diff --git a/.gitignore b/.gitignore
index 8f5b596..c7dd405 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,5 +12,6 @@
 _obj
 _test
 _testmain.go
-protoc-gen-go/testdata/multi/*.pb.go
-_conformance/_conformance
+
+# Conformance test output and transient files.
+conformance/failing_tests.txt
diff --git a/.travis.yml b/.travis.yml
index 93c6780..455fa66 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,17 +2,29 @@
 language: go
 go:
 - 1.6.x
-- 1.7.x
-- 1.8.x
-- 1.9.x
+- 1.10.x
+- 1.x
 
 install:
   - go get -v -d -t github.com/golang/protobuf/...
-  - curl -L https://github.com/google/protobuf/releases/download/v3.3.0/protoc-3.3.0-linux-x86_64.zip -o /tmp/protoc.zip
-  - unzip /tmp/protoc.zip -d $HOME/protoc
+  - curl -L https://github.com/google/protobuf/releases/download/v3.5.1/protoc-3.5.1-linux-x86_64.zip -o /tmp/protoc.zip
+  - unzip /tmp/protoc.zip -d "$HOME"/protoc
+  - mkdir -p "$HOME"/src && ln -s "$HOME"/protoc "$HOME"/src/protobuf
 
 env:
   - PATH=$HOME/protoc/bin:$PATH
 
 script:
-  - make all test
+  - make all
+  - make regenerate
+  # TODO(tamird): When https://github.com/travis-ci/gimme/pull/130 is
+  # released, make this look for "1.x".
+  - if [[ "$TRAVIS_GO_VERSION" == 1.10* ]]; then
+      if [[ "$(git status --porcelain 2>&1)" != "" ]]; then
+        git status >&2;
+        git diff -a >&2;
+        exit 1;
+      fi;
+      echo "git status is clean.";
+    fi;
+  - make test
diff --git a/Make.protobuf b/Make.protobuf
deleted file mode 100644
index 15071de..0000000
--- a/Make.protobuf
+++ /dev/null
@@ -1,40 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-# Includable Makefile to add a rule for generating .pb.go files from .proto files
-# (Google protocol buffer descriptions).
-# Typical use if myproto.proto is a file in package mypackage in this directory:
-#
-#	include $(GOROOT)/src/pkg/github.com/golang/protobuf/Make.protobuf
-
-%.pb.go:	%.proto
-	protoc --go_out=. $<
-
diff --git a/Makefile b/Makefile
index a1421d8..2bc2621 100644
--- a/Makefile
+++ b/Makefile
@@ -29,16 +29,14 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-
 all:	install
 
 install:
-	go install ./proto ./jsonpb ./ptypes
-	go install ./protoc-gen-go
+	go install ./proto ./jsonpb ./ptypes ./protoc-gen-go
 
 test:
-	go test ./proto ./jsonpb ./ptypes
-	make -C protoc-gen-go/testdata test
+	go test ./... ./protoc-gen-go/testdata
+	make -C conformance test
 
 clean:
 	go clean ./...
@@ -47,9 +45,4 @@
 	go clean -i ./...
 
 regenerate:
-	make -C protoc-gen-go/descriptor regenerate
-	make -C protoc-gen-go/plugin regenerate
-	make -C protoc-gen-go/testdata regenerate
-	make -C proto/testdata regenerate
-	make -C jsonpb/jsonpb_test_proto regenerate
-	make -C _conformance regenerate
+	./regenerate.sh
diff --git a/README.md b/README.md
index 9c4c815..01b29da 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 Copyright 2010 The Go Authors.
 https://github.com/golang/protobuf
 
-This package and the code it generates requires at least Go 1.4.
+This package and the code it generates requires at least Go 1.6.
 
 This software implements Go bindings for protocol buffers.  For
 information about protocol buffers themselves, see
@@ -56,13 +56,49 @@
 The generated files will be suffixed .pb.go.  See the Test code below
 for an example using such a file.
 
+## Packages and input paths ##
+
+The protocol buffer language has a concept of "packages" which does not
+correspond well to the Go notion of packages. In generated Go code,
+each source `.proto` file is associated with a single Go package. The
+name and import path for this package is specified with the `go_package`
+proto option:
+
+	option go_package = "github.com/golang/protobuf/ptypes/any";
+
+The protocol buffer compiler will attempt to derive a package name and
+import path if a `go_package` option is not present, but it is
+best to always specify one explicitly.
+
+There is a one-to-one relationship between source `.proto` files and
+generated `.pb.go` files, but any number of `.pb.go` files may be
+contained in the same Go package.
+
+The output name of a generated file is produced by replacing the
+`.proto` suffix with `.pb.go` (e.g., `foo.proto` produces `foo.pb.go`).
+However, the output directory is selected in one of two ways.  Let
+us say we have `inputs/x.proto` with a `go_package` option of
+`github.com/golang/protobuf/p`. The corresponding output file may
+be:
+
+- Relative to the import path:
+
+	protoc --go_out=. inputs/x.proto
+	# writes ./github.com/golang/protobuf/p/x.pb.go
+
+  (This can work well with `--go_out=$GOPATH`.)
+
+- Relative to the input file:
+
+	protoc --go_out=paths=source_relative:. inputs/x.proto
+	# generate ./inputs/x.pb.go
+
+## Generated code ##
 
 The package comment for the proto library contains text describing
 the interface provided in Go for protocol buffers. Here is an edited
 version.
 
-==========
-
 The proto package converts data structures to and from the
 wire format of protocol buffers.  It works in concert with the
 Go source code generated for .proto files by the protocol compiler.
@@ -114,9 +150,9 @@
 ```proto
 	syntax = "proto2";
 	package example;
-	
+
 	enum FOO { X = 17; };
-	
+
 	message Test {
 	  required string label = 1;
 	  optional int32 type = 2 [default=77];
@@ -170,22 +206,25 @@
 To pass extra parameters to the plugin, use a comma-separated
 parameter list separated from the output directory by a colon:
 
-
 	protoc --go_out=plugins=grpc,import_path=mypackage:. *.proto
 
-
-- `import_prefix=xxx` - a prefix that is added onto the beginning of
-  all imports. Useful for things like generating protos in a
-  subdirectory, or regenerating vendored protobufs in-place.
-- `import_path=foo/bar` - used as the package if no input files
-  declare `go_package`. If it contains slashes, everything up to the
-  rightmost slash is ignored.
+- `paths=(import | source_relative)` - specifies how the paths of
+  generated files are structured. See the "Packages and imports paths"
+  section above. The default is `import`.
 - `plugins=plugin1+plugin2` - specifies the list of sub-plugins to
   load. The only plugin in this repo is `grpc`.
 - `Mfoo/bar.proto=quux/shme` - declares that foo/bar.proto is
   associated with Go package quux/shme.  This is subject to the
   import_prefix parameter.
 
+The following parameters are deprecated and should not be used:
+
+- `import_prefix=xxx` - a prefix that is added onto the beginning of
+  all imports.
+- `import_path=foo/bar` - used as the package if no input files
+  declare `go_package`. If it contains slashes, everything up to the
+  rightmost slash is ignored.
+
 ## gRPC Support ##
 
 If a proto file specifies RPC services, protoc-gen-go can be instructed to
diff --git a/_conformance/conformance_proto/conformance.pb.go b/_conformance/conformance_proto/conformance.pb.go
deleted file mode 100644
index ec354ea..0000000
--- a/_conformance/conformance_proto/conformance.pb.go
+++ /dev/null
@@ -1,1885 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: conformance_proto/conformance.proto
-
-/*
-Package conformance is a generated protocol buffer package.
-
-It is generated from these files:
-	conformance_proto/conformance.proto
-
-It has these top-level messages:
-	ConformanceRequest
-	ConformanceResponse
-	TestAllTypes
-	ForeignMessage
-*/
-package conformance
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-import google_protobuf "github.com/golang/protobuf/ptypes/any"
-import google_protobuf1 "github.com/golang/protobuf/ptypes/duration"
-import google_protobuf2 "google.golang.org/genproto/protobuf"
-import google_protobuf3 "github.com/golang/protobuf/ptypes/struct"
-import google_protobuf4 "github.com/golang/protobuf/ptypes/timestamp"
-import google_protobuf5 "github.com/golang/protobuf/ptypes/wrappers"
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type WireFormat int32
-
-const (
-	WireFormat_UNSPECIFIED WireFormat = 0
-	WireFormat_PROTOBUF    WireFormat = 1
-	WireFormat_JSON        WireFormat = 2
-)
-
-var WireFormat_name = map[int32]string{
-	0: "UNSPECIFIED",
-	1: "PROTOBUF",
-	2: "JSON",
-}
-var WireFormat_value = map[string]int32{
-	"UNSPECIFIED": 0,
-	"PROTOBUF":    1,
-	"JSON":        2,
-}
-
-func (x WireFormat) String() string {
-	return proto.EnumName(WireFormat_name, int32(x))
-}
-func (WireFormat) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-
-type ForeignEnum int32
-
-const (
-	ForeignEnum_FOREIGN_FOO ForeignEnum = 0
-	ForeignEnum_FOREIGN_BAR ForeignEnum = 1
-	ForeignEnum_FOREIGN_BAZ ForeignEnum = 2
-)
-
-var ForeignEnum_name = map[int32]string{
-	0: "FOREIGN_FOO",
-	1: "FOREIGN_BAR",
-	2: "FOREIGN_BAZ",
-}
-var ForeignEnum_value = map[string]int32{
-	"FOREIGN_FOO": 0,
-	"FOREIGN_BAR": 1,
-	"FOREIGN_BAZ": 2,
-}
-
-func (x ForeignEnum) String() string {
-	return proto.EnumName(ForeignEnum_name, int32(x))
-}
-func (ForeignEnum) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
-
-type TestAllTypes_NestedEnum int32
-
-const (
-	TestAllTypes_FOO TestAllTypes_NestedEnum = 0
-	TestAllTypes_BAR TestAllTypes_NestedEnum = 1
-	TestAllTypes_BAZ TestAllTypes_NestedEnum = 2
-	TestAllTypes_NEG TestAllTypes_NestedEnum = -1
-)
-
-var TestAllTypes_NestedEnum_name = map[int32]string{
-	0:  "FOO",
-	1:  "BAR",
-	2:  "BAZ",
-	-1: "NEG",
-}
-var TestAllTypes_NestedEnum_value = map[string]int32{
-	"FOO": 0,
-	"BAR": 1,
-	"BAZ": 2,
-	"NEG": -1,
-}
-
-func (x TestAllTypes_NestedEnum) String() string {
-	return proto.EnumName(TestAllTypes_NestedEnum_name, int32(x))
-}
-func (TestAllTypes_NestedEnum) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 0} }
-
-// Represents a single test case's input.  The testee should:
-//
-//   1. parse this proto (which should always succeed)
-//   2. parse the protobuf or JSON payload in "payload" (which may fail)
-//   3. if the parse succeeded, serialize the message in the requested format.
-type ConformanceRequest struct {
-	// The payload (whether protobuf of JSON) is always for a TestAllTypes proto
-	// (see below).
-	//
-	// Types that are valid to be assigned to Payload:
-	//	*ConformanceRequest_ProtobufPayload
-	//	*ConformanceRequest_JsonPayload
-	Payload isConformanceRequest_Payload `protobuf_oneof:"payload"`
-	// Which format should the testee serialize its message to?
-	RequestedOutputFormat WireFormat `protobuf:"varint,3,opt,name=requested_output_format,json=requestedOutputFormat,enum=conformance.WireFormat" json:"requested_output_format,omitempty"`
-}
-
-func (m *ConformanceRequest) Reset()                    { *m = ConformanceRequest{} }
-func (m *ConformanceRequest) String() string            { return proto.CompactTextString(m) }
-func (*ConformanceRequest) ProtoMessage()               {}
-func (*ConformanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-
-type isConformanceRequest_Payload interface {
-	isConformanceRequest_Payload()
-}
-
-type ConformanceRequest_ProtobufPayload struct {
-	ProtobufPayload []byte `protobuf:"bytes,1,opt,name=protobuf_payload,json=protobufPayload,proto3,oneof"`
-}
-type ConformanceRequest_JsonPayload struct {
-	JsonPayload string `protobuf:"bytes,2,opt,name=json_payload,json=jsonPayload,oneof"`
-}
-
-func (*ConformanceRequest_ProtobufPayload) isConformanceRequest_Payload() {}
-func (*ConformanceRequest_JsonPayload) isConformanceRequest_Payload()     {}
-
-func (m *ConformanceRequest) GetPayload() isConformanceRequest_Payload {
-	if m != nil {
-		return m.Payload
-	}
-	return nil
-}
-
-func (m *ConformanceRequest) GetProtobufPayload() []byte {
-	if x, ok := m.GetPayload().(*ConformanceRequest_ProtobufPayload); ok {
-		return x.ProtobufPayload
-	}
-	return nil
-}
-
-func (m *ConformanceRequest) GetJsonPayload() string {
-	if x, ok := m.GetPayload().(*ConformanceRequest_JsonPayload); ok {
-		return x.JsonPayload
-	}
-	return ""
-}
-
-func (m *ConformanceRequest) GetRequestedOutputFormat() WireFormat {
-	if m != nil {
-		return m.RequestedOutputFormat
-	}
-	return WireFormat_UNSPECIFIED
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*ConformanceRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _ConformanceRequest_OneofMarshaler, _ConformanceRequest_OneofUnmarshaler, _ConformanceRequest_OneofSizer, []interface{}{
-		(*ConformanceRequest_ProtobufPayload)(nil),
-		(*ConformanceRequest_JsonPayload)(nil),
-	}
-}
-
-func _ConformanceRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*ConformanceRequest)
-	// payload
-	switch x := m.Payload.(type) {
-	case *ConformanceRequest_ProtobufPayload:
-		b.EncodeVarint(1<<3 | proto.WireBytes)
-		b.EncodeRawBytes(x.ProtobufPayload)
-	case *ConformanceRequest_JsonPayload:
-		b.EncodeVarint(2<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.JsonPayload)
-	case nil:
-	default:
-		return fmt.Errorf("ConformanceRequest.Payload has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _ConformanceRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*ConformanceRequest)
-	switch tag {
-	case 1: // payload.protobuf_payload
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeRawBytes(true)
-		m.Payload = &ConformanceRequest_ProtobufPayload{x}
-		return true, err
-	case 2: // payload.json_payload
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Payload = &ConformanceRequest_JsonPayload{x}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _ConformanceRequest_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*ConformanceRequest)
-	// payload
-	switch x := m.Payload.(type) {
-	case *ConformanceRequest_ProtobufPayload:
-		n += proto.SizeVarint(1<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.ProtobufPayload)))
-		n += len(x.ProtobufPayload)
-	case *ConformanceRequest_JsonPayload:
-		n += proto.SizeVarint(2<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.JsonPayload)))
-		n += len(x.JsonPayload)
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-// Represents a single test case's output.
-type ConformanceResponse struct {
-	// Types that are valid to be assigned to Result:
-	//	*ConformanceResponse_ParseError
-	//	*ConformanceResponse_SerializeError
-	//	*ConformanceResponse_RuntimeError
-	//	*ConformanceResponse_ProtobufPayload
-	//	*ConformanceResponse_JsonPayload
-	//	*ConformanceResponse_Skipped
-	Result isConformanceResponse_Result `protobuf_oneof:"result"`
-}
-
-func (m *ConformanceResponse) Reset()                    { *m = ConformanceResponse{} }
-func (m *ConformanceResponse) String() string            { return proto.CompactTextString(m) }
-func (*ConformanceResponse) ProtoMessage()               {}
-func (*ConformanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
-
-type isConformanceResponse_Result interface {
-	isConformanceResponse_Result()
-}
-
-type ConformanceResponse_ParseError struct {
-	ParseError string `protobuf:"bytes,1,opt,name=parse_error,json=parseError,oneof"`
-}
-type ConformanceResponse_SerializeError struct {
-	SerializeError string `protobuf:"bytes,6,opt,name=serialize_error,json=serializeError,oneof"`
-}
-type ConformanceResponse_RuntimeError struct {
-	RuntimeError string `protobuf:"bytes,2,opt,name=runtime_error,json=runtimeError,oneof"`
-}
-type ConformanceResponse_ProtobufPayload struct {
-	ProtobufPayload []byte `protobuf:"bytes,3,opt,name=protobuf_payload,json=protobufPayload,proto3,oneof"`
-}
-type ConformanceResponse_JsonPayload struct {
-	JsonPayload string `protobuf:"bytes,4,opt,name=json_payload,json=jsonPayload,oneof"`
-}
-type ConformanceResponse_Skipped struct {
-	Skipped string `protobuf:"bytes,5,opt,name=skipped,oneof"`
-}
-
-func (*ConformanceResponse_ParseError) isConformanceResponse_Result()      {}
-func (*ConformanceResponse_SerializeError) isConformanceResponse_Result()  {}
-func (*ConformanceResponse_RuntimeError) isConformanceResponse_Result()    {}
-func (*ConformanceResponse_ProtobufPayload) isConformanceResponse_Result() {}
-func (*ConformanceResponse_JsonPayload) isConformanceResponse_Result()     {}
-func (*ConformanceResponse_Skipped) isConformanceResponse_Result()         {}
-
-func (m *ConformanceResponse) GetResult() isConformanceResponse_Result {
-	if m != nil {
-		return m.Result
-	}
-	return nil
-}
-
-func (m *ConformanceResponse) GetParseError() string {
-	if x, ok := m.GetResult().(*ConformanceResponse_ParseError); ok {
-		return x.ParseError
-	}
-	return ""
-}
-
-func (m *ConformanceResponse) GetSerializeError() string {
-	if x, ok := m.GetResult().(*ConformanceResponse_SerializeError); ok {
-		return x.SerializeError
-	}
-	return ""
-}
-
-func (m *ConformanceResponse) GetRuntimeError() string {
-	if x, ok := m.GetResult().(*ConformanceResponse_RuntimeError); ok {
-		return x.RuntimeError
-	}
-	return ""
-}
-
-func (m *ConformanceResponse) GetProtobufPayload() []byte {
-	if x, ok := m.GetResult().(*ConformanceResponse_ProtobufPayload); ok {
-		return x.ProtobufPayload
-	}
-	return nil
-}
-
-func (m *ConformanceResponse) GetJsonPayload() string {
-	if x, ok := m.GetResult().(*ConformanceResponse_JsonPayload); ok {
-		return x.JsonPayload
-	}
-	return ""
-}
-
-func (m *ConformanceResponse) GetSkipped() string {
-	if x, ok := m.GetResult().(*ConformanceResponse_Skipped); ok {
-		return x.Skipped
-	}
-	return ""
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*ConformanceResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _ConformanceResponse_OneofMarshaler, _ConformanceResponse_OneofUnmarshaler, _ConformanceResponse_OneofSizer, []interface{}{
-		(*ConformanceResponse_ParseError)(nil),
-		(*ConformanceResponse_SerializeError)(nil),
-		(*ConformanceResponse_RuntimeError)(nil),
-		(*ConformanceResponse_ProtobufPayload)(nil),
-		(*ConformanceResponse_JsonPayload)(nil),
-		(*ConformanceResponse_Skipped)(nil),
-	}
-}
-
-func _ConformanceResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*ConformanceResponse)
-	// result
-	switch x := m.Result.(type) {
-	case *ConformanceResponse_ParseError:
-		b.EncodeVarint(1<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.ParseError)
-	case *ConformanceResponse_SerializeError:
-		b.EncodeVarint(6<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.SerializeError)
-	case *ConformanceResponse_RuntimeError:
-		b.EncodeVarint(2<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.RuntimeError)
-	case *ConformanceResponse_ProtobufPayload:
-		b.EncodeVarint(3<<3 | proto.WireBytes)
-		b.EncodeRawBytes(x.ProtobufPayload)
-	case *ConformanceResponse_JsonPayload:
-		b.EncodeVarint(4<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.JsonPayload)
-	case *ConformanceResponse_Skipped:
-		b.EncodeVarint(5<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.Skipped)
-	case nil:
-	default:
-		return fmt.Errorf("ConformanceResponse.Result has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _ConformanceResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*ConformanceResponse)
-	switch tag {
-	case 1: // result.parse_error
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Result = &ConformanceResponse_ParseError{x}
-		return true, err
-	case 6: // result.serialize_error
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Result = &ConformanceResponse_SerializeError{x}
-		return true, err
-	case 2: // result.runtime_error
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Result = &ConformanceResponse_RuntimeError{x}
-		return true, err
-	case 3: // result.protobuf_payload
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeRawBytes(true)
-		m.Result = &ConformanceResponse_ProtobufPayload{x}
-		return true, err
-	case 4: // result.json_payload
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Result = &ConformanceResponse_JsonPayload{x}
-		return true, err
-	case 5: // result.skipped
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Result = &ConformanceResponse_Skipped{x}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _ConformanceResponse_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*ConformanceResponse)
-	// result
-	switch x := m.Result.(type) {
-	case *ConformanceResponse_ParseError:
-		n += proto.SizeVarint(1<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.ParseError)))
-		n += len(x.ParseError)
-	case *ConformanceResponse_SerializeError:
-		n += proto.SizeVarint(6<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.SerializeError)))
-		n += len(x.SerializeError)
-	case *ConformanceResponse_RuntimeError:
-		n += proto.SizeVarint(2<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.RuntimeError)))
-		n += len(x.RuntimeError)
-	case *ConformanceResponse_ProtobufPayload:
-		n += proto.SizeVarint(3<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.ProtobufPayload)))
-		n += len(x.ProtobufPayload)
-	case *ConformanceResponse_JsonPayload:
-		n += proto.SizeVarint(4<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.JsonPayload)))
-		n += len(x.JsonPayload)
-	case *ConformanceResponse_Skipped:
-		n += proto.SizeVarint(5<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.Skipped)))
-		n += len(x.Skipped)
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-// This proto includes every type of field in both singular and repeated
-// forms.
-type TestAllTypes struct {
-	// Singular
-	OptionalInt32          int32                       `protobuf:"varint,1,opt,name=optional_int32,json=optionalInt32" json:"optional_int32,omitempty"`
-	OptionalInt64          int64                       `protobuf:"varint,2,opt,name=optional_int64,json=optionalInt64" json:"optional_int64,omitempty"`
-	OptionalUint32         uint32                      `protobuf:"varint,3,opt,name=optional_uint32,json=optionalUint32" json:"optional_uint32,omitempty"`
-	OptionalUint64         uint64                      `protobuf:"varint,4,opt,name=optional_uint64,json=optionalUint64" json:"optional_uint64,omitempty"`
-	OptionalSint32         int32                       `protobuf:"zigzag32,5,opt,name=optional_sint32,json=optionalSint32" json:"optional_sint32,omitempty"`
-	OptionalSint64         int64                       `protobuf:"zigzag64,6,opt,name=optional_sint64,json=optionalSint64" json:"optional_sint64,omitempty"`
-	OptionalFixed32        uint32                      `protobuf:"fixed32,7,opt,name=optional_fixed32,json=optionalFixed32" json:"optional_fixed32,omitempty"`
-	OptionalFixed64        uint64                      `protobuf:"fixed64,8,opt,name=optional_fixed64,json=optionalFixed64" json:"optional_fixed64,omitempty"`
-	OptionalSfixed32       int32                       `protobuf:"fixed32,9,opt,name=optional_sfixed32,json=optionalSfixed32" json:"optional_sfixed32,omitempty"`
-	OptionalSfixed64       int64                       `protobuf:"fixed64,10,opt,name=optional_sfixed64,json=optionalSfixed64" json:"optional_sfixed64,omitempty"`
-	OptionalFloat          float32                     `protobuf:"fixed32,11,opt,name=optional_float,json=optionalFloat" json:"optional_float,omitempty"`
-	OptionalDouble         float64                     `protobuf:"fixed64,12,opt,name=optional_double,json=optionalDouble" json:"optional_double,omitempty"`
-	OptionalBool           bool                        `protobuf:"varint,13,opt,name=optional_bool,json=optionalBool" json:"optional_bool,omitempty"`
-	OptionalString         string                      `protobuf:"bytes,14,opt,name=optional_string,json=optionalString" json:"optional_string,omitempty"`
-	OptionalBytes          []byte                      `protobuf:"bytes,15,opt,name=optional_bytes,json=optionalBytes,proto3" json:"optional_bytes,omitempty"`
-	OptionalNestedMessage  *TestAllTypes_NestedMessage `protobuf:"bytes,18,opt,name=optional_nested_message,json=optionalNestedMessage" json:"optional_nested_message,omitempty"`
-	OptionalForeignMessage *ForeignMessage             `protobuf:"bytes,19,opt,name=optional_foreign_message,json=optionalForeignMessage" json:"optional_foreign_message,omitempty"`
-	OptionalNestedEnum     TestAllTypes_NestedEnum     `protobuf:"varint,21,opt,name=optional_nested_enum,json=optionalNestedEnum,enum=conformance.TestAllTypes_NestedEnum" json:"optional_nested_enum,omitempty"`
-	OptionalForeignEnum    ForeignEnum                 `protobuf:"varint,22,opt,name=optional_foreign_enum,json=optionalForeignEnum,enum=conformance.ForeignEnum" json:"optional_foreign_enum,omitempty"`
-	OptionalStringPiece    string                      `protobuf:"bytes,24,opt,name=optional_string_piece,json=optionalStringPiece" json:"optional_string_piece,omitempty"`
-	OptionalCord           string                      `protobuf:"bytes,25,opt,name=optional_cord,json=optionalCord" json:"optional_cord,omitempty"`
-	RecursiveMessage       *TestAllTypes               `protobuf:"bytes,27,opt,name=recursive_message,json=recursiveMessage" json:"recursive_message,omitempty"`
-	// Repeated
-	RepeatedInt32          []int32                       `protobuf:"varint,31,rep,packed,name=repeated_int32,json=repeatedInt32" json:"repeated_int32,omitempty"`
-	RepeatedInt64          []int64                       `protobuf:"varint,32,rep,packed,name=repeated_int64,json=repeatedInt64" json:"repeated_int64,omitempty"`
-	RepeatedUint32         []uint32                      `protobuf:"varint,33,rep,packed,name=repeated_uint32,json=repeatedUint32" json:"repeated_uint32,omitempty"`
-	RepeatedUint64         []uint64                      `protobuf:"varint,34,rep,packed,name=repeated_uint64,json=repeatedUint64" json:"repeated_uint64,omitempty"`
-	RepeatedSint32         []int32                       `protobuf:"zigzag32,35,rep,packed,name=repeated_sint32,json=repeatedSint32" json:"repeated_sint32,omitempty"`
-	RepeatedSint64         []int64                       `protobuf:"zigzag64,36,rep,packed,name=repeated_sint64,json=repeatedSint64" json:"repeated_sint64,omitempty"`
-	RepeatedFixed32        []uint32                      `protobuf:"fixed32,37,rep,packed,name=repeated_fixed32,json=repeatedFixed32" json:"repeated_fixed32,omitempty"`
-	RepeatedFixed64        []uint64                      `protobuf:"fixed64,38,rep,packed,name=repeated_fixed64,json=repeatedFixed64" json:"repeated_fixed64,omitempty"`
-	RepeatedSfixed32       []int32                       `protobuf:"fixed32,39,rep,packed,name=repeated_sfixed32,json=repeatedSfixed32" json:"repeated_sfixed32,omitempty"`
-	RepeatedSfixed64       []int64                       `protobuf:"fixed64,40,rep,packed,name=repeated_sfixed64,json=repeatedSfixed64" json:"repeated_sfixed64,omitempty"`
-	RepeatedFloat          []float32                     `protobuf:"fixed32,41,rep,packed,name=repeated_float,json=repeatedFloat" json:"repeated_float,omitempty"`
-	RepeatedDouble         []float64                     `protobuf:"fixed64,42,rep,packed,name=repeated_double,json=repeatedDouble" json:"repeated_double,omitempty"`
-	RepeatedBool           []bool                        `protobuf:"varint,43,rep,packed,name=repeated_bool,json=repeatedBool" json:"repeated_bool,omitempty"`
-	RepeatedString         []string                      `protobuf:"bytes,44,rep,name=repeated_string,json=repeatedString" json:"repeated_string,omitempty"`
-	RepeatedBytes          [][]byte                      `protobuf:"bytes,45,rep,name=repeated_bytes,json=repeatedBytes,proto3" json:"repeated_bytes,omitempty"`
-	RepeatedNestedMessage  []*TestAllTypes_NestedMessage `protobuf:"bytes,48,rep,name=repeated_nested_message,json=repeatedNestedMessage" json:"repeated_nested_message,omitempty"`
-	RepeatedForeignMessage []*ForeignMessage             `protobuf:"bytes,49,rep,name=repeated_foreign_message,json=repeatedForeignMessage" json:"repeated_foreign_message,omitempty"`
-	RepeatedNestedEnum     []TestAllTypes_NestedEnum     `protobuf:"varint,51,rep,packed,name=repeated_nested_enum,json=repeatedNestedEnum,enum=conformance.TestAllTypes_NestedEnum" json:"repeated_nested_enum,omitempty"`
-	RepeatedForeignEnum    []ForeignEnum                 `protobuf:"varint,52,rep,packed,name=repeated_foreign_enum,json=repeatedForeignEnum,enum=conformance.ForeignEnum" json:"repeated_foreign_enum,omitempty"`
-	RepeatedStringPiece    []string                      `protobuf:"bytes,54,rep,name=repeated_string_piece,json=repeatedStringPiece" json:"repeated_string_piece,omitempty"`
-	RepeatedCord           []string                      `protobuf:"bytes,55,rep,name=repeated_cord,json=repeatedCord" json:"repeated_cord,omitempty"`
-	// Map
-	MapInt32Int32           map[int32]int32                        `protobuf:"bytes,56,rep,name=map_int32_int32,json=mapInt32Int32" json:"map_int32_int32,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	MapInt64Int64           map[int64]int64                        `protobuf:"bytes,57,rep,name=map_int64_int64,json=mapInt64Int64" json:"map_int64_int64,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	MapUint32Uint32         map[uint32]uint32                      `protobuf:"bytes,58,rep,name=map_uint32_uint32,json=mapUint32Uint32" json:"map_uint32_uint32,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	MapUint64Uint64         map[uint64]uint64                      `protobuf:"bytes,59,rep,name=map_uint64_uint64,json=mapUint64Uint64" json:"map_uint64_uint64,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	MapSint32Sint32         map[int32]int32                        `protobuf:"bytes,60,rep,name=map_sint32_sint32,json=mapSint32Sint32" json:"map_sint32_sint32,omitempty" protobuf_key:"zigzag32,1,opt,name=key" protobuf_val:"zigzag32,2,opt,name=value"`
-	MapSint64Sint64         map[int64]int64                        `protobuf:"bytes,61,rep,name=map_sint64_sint64,json=mapSint64Sint64" json:"map_sint64_sint64,omitempty" protobuf_key:"zigzag64,1,opt,name=key" protobuf_val:"zigzag64,2,opt,name=value"`
-	MapFixed32Fixed32       map[uint32]uint32                      `protobuf:"bytes,62,rep,name=map_fixed32_fixed32,json=mapFixed32Fixed32" json:"map_fixed32_fixed32,omitempty" protobuf_key:"fixed32,1,opt,name=key" protobuf_val:"fixed32,2,opt,name=value"`
-	MapFixed64Fixed64       map[uint64]uint64                      `protobuf:"bytes,63,rep,name=map_fixed64_fixed64,json=mapFixed64Fixed64" json:"map_fixed64_fixed64,omitempty" protobuf_key:"fixed64,1,opt,name=key" protobuf_val:"fixed64,2,opt,name=value"`
-	MapSfixed32Sfixed32     map[int32]int32                        `protobuf:"bytes,64,rep,name=map_sfixed32_sfixed32,json=mapSfixed32Sfixed32" json:"map_sfixed32_sfixed32,omitempty" protobuf_key:"fixed32,1,opt,name=key" protobuf_val:"fixed32,2,opt,name=value"`
-	MapSfixed64Sfixed64     map[int64]int64                        `protobuf:"bytes,65,rep,name=map_sfixed64_sfixed64,json=mapSfixed64Sfixed64" json:"map_sfixed64_sfixed64,omitempty" protobuf_key:"fixed64,1,opt,name=key" protobuf_val:"fixed64,2,opt,name=value"`
-	MapInt32Float           map[int32]float32                      `protobuf:"bytes,66,rep,name=map_int32_float,json=mapInt32Float" json:"map_int32_float,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"fixed32,2,opt,name=value"`
-	MapInt32Double          map[int32]float64                      `protobuf:"bytes,67,rep,name=map_int32_double,json=mapInt32Double" json:"map_int32_double,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"fixed64,2,opt,name=value"`
-	MapBoolBool             map[bool]bool                          `protobuf:"bytes,68,rep,name=map_bool_bool,json=mapBoolBool" json:"map_bool_bool,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	MapStringString         map[string]string                      `protobuf:"bytes,69,rep,name=map_string_string,json=mapStringString" json:"map_string_string,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	MapStringBytes          map[string][]byte                      `protobuf:"bytes,70,rep,name=map_string_bytes,json=mapStringBytes" json:"map_string_bytes,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value,proto3"`
-	MapStringNestedMessage  map[string]*TestAllTypes_NestedMessage `protobuf:"bytes,71,rep,name=map_string_nested_message,json=mapStringNestedMessage" json:"map_string_nested_message,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	MapStringForeignMessage map[string]*ForeignMessage             `protobuf:"bytes,72,rep,name=map_string_foreign_message,json=mapStringForeignMessage" json:"map_string_foreign_message,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	MapStringNestedEnum     map[string]TestAllTypes_NestedEnum     `protobuf:"bytes,73,rep,name=map_string_nested_enum,json=mapStringNestedEnum" json:"map_string_nested_enum,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"varint,2,opt,name=value,enum=conformance.TestAllTypes_NestedEnum"`
-	MapStringForeignEnum    map[string]ForeignEnum                 `protobuf:"bytes,74,rep,name=map_string_foreign_enum,json=mapStringForeignEnum" json:"map_string_foreign_enum,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"varint,2,opt,name=value,enum=conformance.ForeignEnum"`
-	// Types that are valid to be assigned to OneofField:
-	//	*TestAllTypes_OneofUint32
-	//	*TestAllTypes_OneofNestedMessage
-	//	*TestAllTypes_OneofString
-	//	*TestAllTypes_OneofBytes
-	//	*TestAllTypes_OneofBool
-	//	*TestAllTypes_OneofUint64
-	//	*TestAllTypes_OneofFloat
-	//	*TestAllTypes_OneofDouble
-	//	*TestAllTypes_OneofEnum
-	OneofField isTestAllTypes_OneofField `protobuf_oneof:"oneof_field"`
-	// Well-known types
-	OptionalBoolWrapper   *google_protobuf5.BoolValue     `protobuf:"bytes,201,opt,name=optional_bool_wrapper,json=optionalBoolWrapper" json:"optional_bool_wrapper,omitempty"`
-	OptionalInt32Wrapper  *google_protobuf5.Int32Value    `protobuf:"bytes,202,opt,name=optional_int32_wrapper,json=optionalInt32Wrapper" json:"optional_int32_wrapper,omitempty"`
-	OptionalInt64Wrapper  *google_protobuf5.Int64Value    `protobuf:"bytes,203,opt,name=optional_int64_wrapper,json=optionalInt64Wrapper" json:"optional_int64_wrapper,omitempty"`
-	OptionalUint32Wrapper *google_protobuf5.UInt32Value   `protobuf:"bytes,204,opt,name=optional_uint32_wrapper,json=optionalUint32Wrapper" json:"optional_uint32_wrapper,omitempty"`
-	OptionalUint64Wrapper *google_protobuf5.UInt64Value   `protobuf:"bytes,205,opt,name=optional_uint64_wrapper,json=optionalUint64Wrapper" json:"optional_uint64_wrapper,omitempty"`
-	OptionalFloatWrapper  *google_protobuf5.FloatValue    `protobuf:"bytes,206,opt,name=optional_float_wrapper,json=optionalFloatWrapper" json:"optional_float_wrapper,omitempty"`
-	OptionalDoubleWrapper *google_protobuf5.DoubleValue   `protobuf:"bytes,207,opt,name=optional_double_wrapper,json=optionalDoubleWrapper" json:"optional_double_wrapper,omitempty"`
-	OptionalStringWrapper *google_protobuf5.StringValue   `protobuf:"bytes,208,opt,name=optional_string_wrapper,json=optionalStringWrapper" json:"optional_string_wrapper,omitempty"`
-	OptionalBytesWrapper  *google_protobuf5.BytesValue    `protobuf:"bytes,209,opt,name=optional_bytes_wrapper,json=optionalBytesWrapper" json:"optional_bytes_wrapper,omitempty"`
-	RepeatedBoolWrapper   []*google_protobuf5.BoolValue   `protobuf:"bytes,211,rep,name=repeated_bool_wrapper,json=repeatedBoolWrapper" json:"repeated_bool_wrapper,omitempty"`
-	RepeatedInt32Wrapper  []*google_protobuf5.Int32Value  `protobuf:"bytes,212,rep,name=repeated_int32_wrapper,json=repeatedInt32Wrapper" json:"repeated_int32_wrapper,omitempty"`
-	RepeatedInt64Wrapper  []*google_protobuf5.Int64Value  `protobuf:"bytes,213,rep,name=repeated_int64_wrapper,json=repeatedInt64Wrapper" json:"repeated_int64_wrapper,omitempty"`
-	RepeatedUint32Wrapper []*google_protobuf5.UInt32Value `protobuf:"bytes,214,rep,name=repeated_uint32_wrapper,json=repeatedUint32Wrapper" json:"repeated_uint32_wrapper,omitempty"`
-	RepeatedUint64Wrapper []*google_protobuf5.UInt64Value `protobuf:"bytes,215,rep,name=repeated_uint64_wrapper,json=repeatedUint64Wrapper" json:"repeated_uint64_wrapper,omitempty"`
-	RepeatedFloatWrapper  []*google_protobuf5.FloatValue  `protobuf:"bytes,216,rep,name=repeated_float_wrapper,json=repeatedFloatWrapper" json:"repeated_float_wrapper,omitempty"`
-	RepeatedDoubleWrapper []*google_protobuf5.DoubleValue `protobuf:"bytes,217,rep,name=repeated_double_wrapper,json=repeatedDoubleWrapper" json:"repeated_double_wrapper,omitempty"`
-	RepeatedStringWrapper []*google_protobuf5.StringValue `protobuf:"bytes,218,rep,name=repeated_string_wrapper,json=repeatedStringWrapper" json:"repeated_string_wrapper,omitempty"`
-	RepeatedBytesWrapper  []*google_protobuf5.BytesValue  `protobuf:"bytes,219,rep,name=repeated_bytes_wrapper,json=repeatedBytesWrapper" json:"repeated_bytes_wrapper,omitempty"`
-	OptionalDuration      *google_protobuf1.Duration      `protobuf:"bytes,301,opt,name=optional_duration,json=optionalDuration" json:"optional_duration,omitempty"`
-	OptionalTimestamp     *google_protobuf4.Timestamp     `protobuf:"bytes,302,opt,name=optional_timestamp,json=optionalTimestamp" json:"optional_timestamp,omitempty"`
-	OptionalFieldMask     *google_protobuf2.FieldMask     `protobuf:"bytes,303,opt,name=optional_field_mask,json=optionalFieldMask" json:"optional_field_mask,omitempty"`
-	OptionalStruct        *google_protobuf3.Struct        `protobuf:"bytes,304,opt,name=optional_struct,json=optionalStruct" json:"optional_struct,omitempty"`
-	OptionalAny           *google_protobuf.Any            `protobuf:"bytes,305,opt,name=optional_any,json=optionalAny" json:"optional_any,omitempty"`
-	OptionalValue         *google_protobuf3.Value         `protobuf:"bytes,306,opt,name=optional_value,json=optionalValue" json:"optional_value,omitempty"`
-	RepeatedDuration      []*google_protobuf1.Duration    `protobuf:"bytes,311,rep,name=repeated_duration,json=repeatedDuration" json:"repeated_duration,omitempty"`
-	RepeatedTimestamp     []*google_protobuf4.Timestamp   `protobuf:"bytes,312,rep,name=repeated_timestamp,json=repeatedTimestamp" json:"repeated_timestamp,omitempty"`
-	RepeatedFieldmask     []*google_protobuf2.FieldMask   `protobuf:"bytes,313,rep,name=repeated_fieldmask,json=repeatedFieldmask" json:"repeated_fieldmask,omitempty"`
-	RepeatedStruct        []*google_protobuf3.Struct      `protobuf:"bytes,324,rep,name=repeated_struct,json=repeatedStruct" json:"repeated_struct,omitempty"`
-	RepeatedAny           []*google_protobuf.Any          `protobuf:"bytes,315,rep,name=repeated_any,json=repeatedAny" json:"repeated_any,omitempty"`
-	RepeatedValue         []*google_protobuf3.Value       `protobuf:"bytes,316,rep,name=repeated_value,json=repeatedValue" json:"repeated_value,omitempty"`
-	// Test field-name-to-JSON-name convention.
-	// (protobuf says names can be any valid C/C++ identifier.)
-	Fieldname1    int32 `protobuf:"varint,401,opt,name=fieldname1" json:"fieldname1,omitempty"`
-	FieldName2    int32 `protobuf:"varint,402,opt,name=field_name2,json=fieldName2" json:"field_name2,omitempty"`
-	XFieldName3   int32 `protobuf:"varint,403,opt,name=_field_name3,json=FieldName3" json:"_field_name3,omitempty"`
-	Field_Name4_  int32 `protobuf:"varint,404,opt,name=field__name4_,json=fieldName4" json:"field__name4_,omitempty"`
-	Field0Name5   int32 `protobuf:"varint,405,opt,name=field0name5" json:"field0name5,omitempty"`
-	Field_0Name6  int32 `protobuf:"varint,406,opt,name=field_0_name6,json=field0Name6" json:"field_0_name6,omitempty"`
-	FieldName7    int32 `protobuf:"varint,407,opt,name=fieldName7" json:"fieldName7,omitempty"`
-	FieldName8    int32 `protobuf:"varint,408,opt,name=FieldName8" json:"FieldName8,omitempty"`
-	Field_Name9   int32 `protobuf:"varint,409,opt,name=field_Name9,json=fieldName9" json:"field_Name9,omitempty"`
-	Field_Name10  int32 `protobuf:"varint,410,opt,name=Field_Name10,json=FieldName10" json:"Field_Name10,omitempty"`
-	FIELD_NAME11  int32 `protobuf:"varint,411,opt,name=FIELD_NAME11,json=FIELDNAME11" json:"FIELD_NAME11,omitempty"`
-	FIELDName12   int32 `protobuf:"varint,412,opt,name=FIELD_name12,json=FIELDName12" json:"FIELD_name12,omitempty"`
-	XFieldName13  int32 `protobuf:"varint,413,opt,name=__field_name13,json=FieldName13" json:"__field_name13,omitempty"`
-	X_FieldName14 int32 `protobuf:"varint,414,opt,name=__Field_name14,json=FieldName14" json:"__Field_name14,omitempty"`
-	Field_Name15  int32 `protobuf:"varint,415,opt,name=field__name15,json=fieldName15" json:"field__name15,omitempty"`
-	Field__Name16 int32 `protobuf:"varint,416,opt,name=field__Name16,json=fieldName16" json:"field__Name16,omitempty"`
-	FieldName17__ int32 `protobuf:"varint,417,opt,name=field_name17__,json=fieldName17" json:"field_name17__,omitempty"`
-	FieldName18__ int32 `protobuf:"varint,418,opt,name=Field_name18__,json=FieldName18" json:"Field_name18__,omitempty"`
-}
-
-func (m *TestAllTypes) Reset()                    { *m = TestAllTypes{} }
-func (m *TestAllTypes) String() string            { return proto.CompactTextString(m) }
-func (*TestAllTypes) ProtoMessage()               {}
-func (*TestAllTypes) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
-
-type isTestAllTypes_OneofField interface {
-	isTestAllTypes_OneofField()
-}
-
-type TestAllTypes_OneofUint32 struct {
-	OneofUint32 uint32 `protobuf:"varint,111,opt,name=oneof_uint32,json=oneofUint32,oneof"`
-}
-type TestAllTypes_OneofNestedMessage struct {
-	OneofNestedMessage *TestAllTypes_NestedMessage `protobuf:"bytes,112,opt,name=oneof_nested_message,json=oneofNestedMessage,oneof"`
-}
-type TestAllTypes_OneofString struct {
-	OneofString string `protobuf:"bytes,113,opt,name=oneof_string,json=oneofString,oneof"`
-}
-type TestAllTypes_OneofBytes struct {
-	OneofBytes []byte `protobuf:"bytes,114,opt,name=oneof_bytes,json=oneofBytes,proto3,oneof"`
-}
-type TestAllTypes_OneofBool struct {
-	OneofBool bool `protobuf:"varint,115,opt,name=oneof_bool,json=oneofBool,oneof"`
-}
-type TestAllTypes_OneofUint64 struct {
-	OneofUint64 uint64 `protobuf:"varint,116,opt,name=oneof_uint64,json=oneofUint64,oneof"`
-}
-type TestAllTypes_OneofFloat struct {
-	OneofFloat float32 `protobuf:"fixed32,117,opt,name=oneof_float,json=oneofFloat,oneof"`
-}
-type TestAllTypes_OneofDouble struct {
-	OneofDouble float64 `protobuf:"fixed64,118,opt,name=oneof_double,json=oneofDouble,oneof"`
-}
-type TestAllTypes_OneofEnum struct {
-	OneofEnum TestAllTypes_NestedEnum `protobuf:"varint,119,opt,name=oneof_enum,json=oneofEnum,enum=conformance.TestAllTypes_NestedEnum,oneof"`
-}
-
-func (*TestAllTypes_OneofUint32) isTestAllTypes_OneofField()        {}
-func (*TestAllTypes_OneofNestedMessage) isTestAllTypes_OneofField() {}
-func (*TestAllTypes_OneofString) isTestAllTypes_OneofField()        {}
-func (*TestAllTypes_OneofBytes) isTestAllTypes_OneofField()         {}
-func (*TestAllTypes_OneofBool) isTestAllTypes_OneofField()          {}
-func (*TestAllTypes_OneofUint64) isTestAllTypes_OneofField()        {}
-func (*TestAllTypes_OneofFloat) isTestAllTypes_OneofField()         {}
-func (*TestAllTypes_OneofDouble) isTestAllTypes_OneofField()        {}
-func (*TestAllTypes_OneofEnum) isTestAllTypes_OneofField()          {}
-
-func (m *TestAllTypes) GetOneofField() isTestAllTypes_OneofField {
-	if m != nil {
-		return m.OneofField
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalInt32() int32 {
-	if m != nil {
-		return m.OptionalInt32
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalInt64() int64 {
-	if m != nil {
-		return m.OptionalInt64
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalUint32() uint32 {
-	if m != nil {
-		return m.OptionalUint32
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalUint64() uint64 {
-	if m != nil {
-		return m.OptionalUint64
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalSint32() int32 {
-	if m != nil {
-		return m.OptionalSint32
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalSint64() int64 {
-	if m != nil {
-		return m.OptionalSint64
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalFixed32() uint32 {
-	if m != nil {
-		return m.OptionalFixed32
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalFixed64() uint64 {
-	if m != nil {
-		return m.OptionalFixed64
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalSfixed32() int32 {
-	if m != nil {
-		return m.OptionalSfixed32
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalSfixed64() int64 {
-	if m != nil {
-		return m.OptionalSfixed64
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalFloat() float32 {
-	if m != nil {
-		return m.OptionalFloat
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalDouble() float64 {
-	if m != nil {
-		return m.OptionalDouble
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOptionalBool() bool {
-	if m != nil {
-		return m.OptionalBool
-	}
-	return false
-}
-
-func (m *TestAllTypes) GetOptionalString() string {
-	if m != nil {
-		return m.OptionalString
-	}
-	return ""
-}
-
-func (m *TestAllTypes) GetOptionalBytes() []byte {
-	if m != nil {
-		return m.OptionalBytes
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalNestedMessage() *TestAllTypes_NestedMessage {
-	if m != nil {
-		return m.OptionalNestedMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalForeignMessage() *ForeignMessage {
-	if m != nil {
-		return m.OptionalForeignMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalNestedEnum() TestAllTypes_NestedEnum {
-	if m != nil {
-		return m.OptionalNestedEnum
-	}
-	return TestAllTypes_FOO
-}
-
-func (m *TestAllTypes) GetOptionalForeignEnum() ForeignEnum {
-	if m != nil {
-		return m.OptionalForeignEnum
-	}
-	return ForeignEnum_FOREIGN_FOO
-}
-
-func (m *TestAllTypes) GetOptionalStringPiece() string {
-	if m != nil {
-		return m.OptionalStringPiece
-	}
-	return ""
-}
-
-func (m *TestAllTypes) GetOptionalCord() string {
-	if m != nil {
-		return m.OptionalCord
-	}
-	return ""
-}
-
-func (m *TestAllTypes) GetRecursiveMessage() *TestAllTypes {
-	if m != nil {
-		return m.RecursiveMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedInt32() []int32 {
-	if m != nil {
-		return m.RepeatedInt32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedInt64() []int64 {
-	if m != nil {
-		return m.RepeatedInt64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedUint32() []uint32 {
-	if m != nil {
-		return m.RepeatedUint32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedUint64() []uint64 {
-	if m != nil {
-		return m.RepeatedUint64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedSint32() []int32 {
-	if m != nil {
-		return m.RepeatedSint32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedSint64() []int64 {
-	if m != nil {
-		return m.RepeatedSint64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedFixed32() []uint32 {
-	if m != nil {
-		return m.RepeatedFixed32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedFixed64() []uint64 {
-	if m != nil {
-		return m.RepeatedFixed64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedSfixed32() []int32 {
-	if m != nil {
-		return m.RepeatedSfixed32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedSfixed64() []int64 {
-	if m != nil {
-		return m.RepeatedSfixed64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedFloat() []float32 {
-	if m != nil {
-		return m.RepeatedFloat
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedDouble() []float64 {
-	if m != nil {
-		return m.RepeatedDouble
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedBool() []bool {
-	if m != nil {
-		return m.RepeatedBool
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedString() []string {
-	if m != nil {
-		return m.RepeatedString
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedBytes() [][]byte {
-	if m != nil {
-		return m.RepeatedBytes
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedNestedMessage() []*TestAllTypes_NestedMessage {
-	if m != nil {
-		return m.RepeatedNestedMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedForeignMessage() []*ForeignMessage {
-	if m != nil {
-		return m.RepeatedForeignMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedNestedEnum() []TestAllTypes_NestedEnum {
-	if m != nil {
-		return m.RepeatedNestedEnum
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedForeignEnum() []ForeignEnum {
-	if m != nil {
-		return m.RepeatedForeignEnum
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedStringPiece() []string {
-	if m != nil {
-		return m.RepeatedStringPiece
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedCord() []string {
-	if m != nil {
-		return m.RepeatedCord
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapInt32Int32() map[int32]int32 {
-	if m != nil {
-		return m.MapInt32Int32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapInt64Int64() map[int64]int64 {
-	if m != nil {
-		return m.MapInt64Int64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapUint32Uint32() map[uint32]uint32 {
-	if m != nil {
-		return m.MapUint32Uint32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapUint64Uint64() map[uint64]uint64 {
-	if m != nil {
-		return m.MapUint64Uint64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapSint32Sint32() map[int32]int32 {
-	if m != nil {
-		return m.MapSint32Sint32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapSint64Sint64() map[int64]int64 {
-	if m != nil {
-		return m.MapSint64Sint64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapFixed32Fixed32() map[uint32]uint32 {
-	if m != nil {
-		return m.MapFixed32Fixed32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapFixed64Fixed64() map[uint64]uint64 {
-	if m != nil {
-		return m.MapFixed64Fixed64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapSfixed32Sfixed32() map[int32]int32 {
-	if m != nil {
-		return m.MapSfixed32Sfixed32
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapSfixed64Sfixed64() map[int64]int64 {
-	if m != nil {
-		return m.MapSfixed64Sfixed64
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapInt32Float() map[int32]float32 {
-	if m != nil {
-		return m.MapInt32Float
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapInt32Double() map[int32]float64 {
-	if m != nil {
-		return m.MapInt32Double
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapBoolBool() map[bool]bool {
-	if m != nil {
-		return m.MapBoolBool
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapStringString() map[string]string {
-	if m != nil {
-		return m.MapStringString
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapStringBytes() map[string][]byte {
-	if m != nil {
-		return m.MapStringBytes
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapStringNestedMessage() map[string]*TestAllTypes_NestedMessage {
-	if m != nil {
-		return m.MapStringNestedMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapStringForeignMessage() map[string]*ForeignMessage {
-	if m != nil {
-		return m.MapStringForeignMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapStringNestedEnum() map[string]TestAllTypes_NestedEnum {
-	if m != nil {
-		return m.MapStringNestedEnum
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetMapStringForeignEnum() map[string]ForeignEnum {
-	if m != nil {
-		return m.MapStringForeignEnum
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOneofUint32() uint32 {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofUint32); ok {
-		return x.OneofUint32
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOneofNestedMessage() *TestAllTypes_NestedMessage {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofNestedMessage); ok {
-		return x.OneofNestedMessage
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOneofString() string {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofString); ok {
-		return x.OneofString
-	}
-	return ""
-}
-
-func (m *TestAllTypes) GetOneofBytes() []byte {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofBytes); ok {
-		return x.OneofBytes
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOneofBool() bool {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofBool); ok {
-		return x.OneofBool
-	}
-	return false
-}
-
-func (m *TestAllTypes) GetOneofUint64() uint64 {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofUint64); ok {
-		return x.OneofUint64
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOneofFloat() float32 {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofFloat); ok {
-		return x.OneofFloat
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOneofDouble() float64 {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofDouble); ok {
-		return x.OneofDouble
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetOneofEnum() TestAllTypes_NestedEnum {
-	if x, ok := m.GetOneofField().(*TestAllTypes_OneofEnum); ok {
-		return x.OneofEnum
-	}
-	return TestAllTypes_FOO
-}
-
-func (m *TestAllTypes) GetOptionalBoolWrapper() *google_protobuf5.BoolValue {
-	if m != nil {
-		return m.OptionalBoolWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalInt32Wrapper() *google_protobuf5.Int32Value {
-	if m != nil {
-		return m.OptionalInt32Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalInt64Wrapper() *google_protobuf5.Int64Value {
-	if m != nil {
-		return m.OptionalInt64Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalUint32Wrapper() *google_protobuf5.UInt32Value {
-	if m != nil {
-		return m.OptionalUint32Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalUint64Wrapper() *google_protobuf5.UInt64Value {
-	if m != nil {
-		return m.OptionalUint64Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalFloatWrapper() *google_protobuf5.FloatValue {
-	if m != nil {
-		return m.OptionalFloatWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalDoubleWrapper() *google_protobuf5.DoubleValue {
-	if m != nil {
-		return m.OptionalDoubleWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalStringWrapper() *google_protobuf5.StringValue {
-	if m != nil {
-		return m.OptionalStringWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalBytesWrapper() *google_protobuf5.BytesValue {
-	if m != nil {
-		return m.OptionalBytesWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedBoolWrapper() []*google_protobuf5.BoolValue {
-	if m != nil {
-		return m.RepeatedBoolWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedInt32Wrapper() []*google_protobuf5.Int32Value {
-	if m != nil {
-		return m.RepeatedInt32Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedInt64Wrapper() []*google_protobuf5.Int64Value {
-	if m != nil {
-		return m.RepeatedInt64Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedUint32Wrapper() []*google_protobuf5.UInt32Value {
-	if m != nil {
-		return m.RepeatedUint32Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedUint64Wrapper() []*google_protobuf5.UInt64Value {
-	if m != nil {
-		return m.RepeatedUint64Wrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedFloatWrapper() []*google_protobuf5.FloatValue {
-	if m != nil {
-		return m.RepeatedFloatWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedDoubleWrapper() []*google_protobuf5.DoubleValue {
-	if m != nil {
-		return m.RepeatedDoubleWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedStringWrapper() []*google_protobuf5.StringValue {
-	if m != nil {
-		return m.RepeatedStringWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedBytesWrapper() []*google_protobuf5.BytesValue {
-	if m != nil {
-		return m.RepeatedBytesWrapper
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalDuration() *google_protobuf1.Duration {
-	if m != nil {
-		return m.OptionalDuration
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalTimestamp() *google_protobuf4.Timestamp {
-	if m != nil {
-		return m.OptionalTimestamp
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalFieldMask() *google_protobuf2.FieldMask {
-	if m != nil {
-		return m.OptionalFieldMask
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalStruct() *google_protobuf3.Struct {
-	if m != nil {
-		return m.OptionalStruct
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalAny() *google_protobuf.Any {
-	if m != nil {
-		return m.OptionalAny
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetOptionalValue() *google_protobuf3.Value {
-	if m != nil {
-		return m.OptionalValue
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedDuration() []*google_protobuf1.Duration {
-	if m != nil {
-		return m.RepeatedDuration
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedTimestamp() []*google_protobuf4.Timestamp {
-	if m != nil {
-		return m.RepeatedTimestamp
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedFieldmask() []*google_protobuf2.FieldMask {
-	if m != nil {
-		return m.RepeatedFieldmask
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedStruct() []*google_protobuf3.Struct {
-	if m != nil {
-		return m.RepeatedStruct
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedAny() []*google_protobuf.Any {
-	if m != nil {
-		return m.RepeatedAny
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetRepeatedValue() []*google_protobuf3.Value {
-	if m != nil {
-		return m.RepeatedValue
-	}
-	return nil
-}
-
-func (m *TestAllTypes) GetFieldname1() int32 {
-	if m != nil {
-		return m.Fieldname1
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetFieldName2() int32 {
-	if m != nil {
-		return m.FieldName2
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetXFieldName3() int32 {
-	if m != nil {
-		return m.XFieldName3
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetField_Name4_() int32 {
-	if m != nil {
-		return m.Field_Name4_
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetField0Name5() int32 {
-	if m != nil {
-		return m.Field0Name5
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetField_0Name6() int32 {
-	if m != nil {
-		return m.Field_0Name6
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetFieldName7() int32 {
-	if m != nil {
-		return m.FieldName7
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetFieldName8() int32 {
-	if m != nil {
-		return m.FieldName8
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetField_Name9() int32 {
-	if m != nil {
-		return m.Field_Name9
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetField_Name10() int32 {
-	if m != nil {
-		return m.Field_Name10
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetFIELD_NAME11() int32 {
-	if m != nil {
-		return m.FIELD_NAME11
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetFIELDName12() int32 {
-	if m != nil {
-		return m.FIELDName12
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetXFieldName13() int32 {
-	if m != nil {
-		return m.XFieldName13
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetX_FieldName14() int32 {
-	if m != nil {
-		return m.X_FieldName14
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetField_Name15() int32 {
-	if m != nil {
-		return m.Field_Name15
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetField__Name16() int32 {
-	if m != nil {
-		return m.Field__Name16
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetFieldName17__() int32 {
-	if m != nil {
-		return m.FieldName17__
-	}
-	return 0
-}
-
-func (m *TestAllTypes) GetFieldName18__() int32 {
-	if m != nil {
-		return m.FieldName18__
-	}
-	return 0
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*TestAllTypes) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _TestAllTypes_OneofMarshaler, _TestAllTypes_OneofUnmarshaler, _TestAllTypes_OneofSizer, []interface{}{
-		(*TestAllTypes_OneofUint32)(nil),
-		(*TestAllTypes_OneofNestedMessage)(nil),
-		(*TestAllTypes_OneofString)(nil),
-		(*TestAllTypes_OneofBytes)(nil),
-		(*TestAllTypes_OneofBool)(nil),
-		(*TestAllTypes_OneofUint64)(nil),
-		(*TestAllTypes_OneofFloat)(nil),
-		(*TestAllTypes_OneofDouble)(nil),
-		(*TestAllTypes_OneofEnum)(nil),
-	}
-}
-
-func _TestAllTypes_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*TestAllTypes)
-	// oneof_field
-	switch x := m.OneofField.(type) {
-	case *TestAllTypes_OneofUint32:
-		b.EncodeVarint(111<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.OneofUint32))
-	case *TestAllTypes_OneofNestedMessage:
-		b.EncodeVarint(112<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.OneofNestedMessage); err != nil {
-			return err
-		}
-	case *TestAllTypes_OneofString:
-		b.EncodeVarint(113<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.OneofString)
-	case *TestAllTypes_OneofBytes:
-		b.EncodeVarint(114<<3 | proto.WireBytes)
-		b.EncodeRawBytes(x.OneofBytes)
-	case *TestAllTypes_OneofBool:
-		t := uint64(0)
-		if x.OneofBool {
-			t = 1
-		}
-		b.EncodeVarint(115<<3 | proto.WireVarint)
-		b.EncodeVarint(t)
-	case *TestAllTypes_OneofUint64:
-		b.EncodeVarint(116<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.OneofUint64))
-	case *TestAllTypes_OneofFloat:
-		b.EncodeVarint(117<<3 | proto.WireFixed32)
-		b.EncodeFixed32(uint64(math.Float32bits(x.OneofFloat)))
-	case *TestAllTypes_OneofDouble:
-		b.EncodeVarint(118<<3 | proto.WireFixed64)
-		b.EncodeFixed64(math.Float64bits(x.OneofDouble))
-	case *TestAllTypes_OneofEnum:
-		b.EncodeVarint(119<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.OneofEnum))
-	case nil:
-	default:
-		return fmt.Errorf("TestAllTypes.OneofField has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _TestAllTypes_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*TestAllTypes)
-	switch tag {
-	case 111: // oneof_field.oneof_uint32
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.OneofField = &TestAllTypes_OneofUint32{uint32(x)}
-		return true, err
-	case 112: // oneof_field.oneof_nested_message
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(TestAllTypes_NestedMessage)
-		err := b.DecodeMessage(msg)
-		m.OneofField = &TestAllTypes_OneofNestedMessage{msg}
-		return true, err
-	case 113: // oneof_field.oneof_string
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.OneofField = &TestAllTypes_OneofString{x}
-		return true, err
-	case 114: // oneof_field.oneof_bytes
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeRawBytes(true)
-		m.OneofField = &TestAllTypes_OneofBytes{x}
-		return true, err
-	case 115: // oneof_field.oneof_bool
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.OneofField = &TestAllTypes_OneofBool{x != 0}
-		return true, err
-	case 116: // oneof_field.oneof_uint64
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.OneofField = &TestAllTypes_OneofUint64{x}
-		return true, err
-	case 117: // oneof_field.oneof_float
-		if wire != proto.WireFixed32 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed32()
-		m.OneofField = &TestAllTypes_OneofFloat{math.Float32frombits(uint32(x))}
-		return true, err
-	case 118: // oneof_field.oneof_double
-		if wire != proto.WireFixed64 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed64()
-		m.OneofField = &TestAllTypes_OneofDouble{math.Float64frombits(x)}
-		return true, err
-	case 119: // oneof_field.oneof_enum
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.OneofField = &TestAllTypes_OneofEnum{TestAllTypes_NestedEnum(x)}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _TestAllTypes_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*TestAllTypes)
-	// oneof_field
-	switch x := m.OneofField.(type) {
-	case *TestAllTypes_OneofUint32:
-		n += proto.SizeVarint(111<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.OneofUint32))
-	case *TestAllTypes_OneofNestedMessage:
-		s := proto.Size(x.OneofNestedMessage)
-		n += proto.SizeVarint(112<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case *TestAllTypes_OneofString:
-		n += proto.SizeVarint(113<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.OneofString)))
-		n += len(x.OneofString)
-	case *TestAllTypes_OneofBytes:
-		n += proto.SizeVarint(114<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.OneofBytes)))
-		n += len(x.OneofBytes)
-	case *TestAllTypes_OneofBool:
-		n += proto.SizeVarint(115<<3 | proto.WireVarint)
-		n += 1
-	case *TestAllTypes_OneofUint64:
-		n += proto.SizeVarint(116<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.OneofUint64))
-	case *TestAllTypes_OneofFloat:
-		n += proto.SizeVarint(117<<3 | proto.WireFixed32)
-		n += 4
-	case *TestAllTypes_OneofDouble:
-		n += proto.SizeVarint(118<<3 | proto.WireFixed64)
-		n += 8
-	case *TestAllTypes_OneofEnum:
-		n += proto.SizeVarint(119<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.OneofEnum))
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-type TestAllTypes_NestedMessage struct {
-	A           int32         `protobuf:"varint,1,opt,name=a" json:"a,omitempty"`
-	Corecursive *TestAllTypes `protobuf:"bytes,2,opt,name=corecursive" json:"corecursive,omitempty"`
-}
-
-func (m *TestAllTypes_NestedMessage) Reset()                    { *m = TestAllTypes_NestedMessage{} }
-func (m *TestAllTypes_NestedMessage) String() string            { return proto.CompactTextString(m) }
-func (*TestAllTypes_NestedMessage) ProtoMessage()               {}
-func (*TestAllTypes_NestedMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 0} }
-
-func (m *TestAllTypes_NestedMessage) GetA() int32 {
-	if m != nil {
-		return m.A
-	}
-	return 0
-}
-
-func (m *TestAllTypes_NestedMessage) GetCorecursive() *TestAllTypes {
-	if m != nil {
-		return m.Corecursive
-	}
-	return nil
-}
-
-type ForeignMessage struct {
-	C int32 `protobuf:"varint,1,opt,name=c" json:"c,omitempty"`
-}
-
-func (m *ForeignMessage) Reset()                    { *m = ForeignMessage{} }
-func (m *ForeignMessage) String() string            { return proto.CompactTextString(m) }
-func (*ForeignMessage) ProtoMessage()               {}
-func (*ForeignMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
-
-func (m *ForeignMessage) GetC() int32 {
-	if m != nil {
-		return m.C
-	}
-	return 0
-}
-
-func init() {
-	proto.RegisterType((*ConformanceRequest)(nil), "conformance.ConformanceRequest")
-	proto.RegisterType((*ConformanceResponse)(nil), "conformance.ConformanceResponse")
-	proto.RegisterType((*TestAllTypes)(nil), "conformance.TestAllTypes")
-	proto.RegisterType((*TestAllTypes_NestedMessage)(nil), "conformance.TestAllTypes.NestedMessage")
-	proto.RegisterType((*ForeignMessage)(nil), "conformance.ForeignMessage")
-	proto.RegisterEnum("conformance.WireFormat", WireFormat_name, WireFormat_value)
-	proto.RegisterEnum("conformance.ForeignEnum", ForeignEnum_name, ForeignEnum_value)
-	proto.RegisterEnum("conformance.TestAllTypes_NestedEnum", TestAllTypes_NestedEnum_name, TestAllTypes_NestedEnum_value)
-}
-
-func init() { proto.RegisterFile("conformance_proto/conformance.proto", fileDescriptor0) }
-
-var fileDescriptor0 = []byte{
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-	0xa1, 0x2a, 0xcd, 0xaf, 0x8e, 0x0e, 0xd2, 0x68, 0xb5, 0xe6, 0xff, 0x57, 0x16, 0xad, 0xd2, 0xfc,
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-	0x52, 0xe6, 0x71, 0xa7, 0x51, 0x18, 0x32, 0xc5, 0x5d, 0x50, 0xd4, 0x87, 0x6f, 0xf2, 0xfa, 0xb1,
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-	0x91, 0xa9, 0x5e, 0xe3, 0x7d, 0x95, 0xe4, 0xf3, 0x18, 0x9c, 0xef, 0x37, 0x33, 0x4b, 0x71, 0xba,
-	0xa6, 0x3a, 0xed, 0xfb, 0x0a, 0x4b, 0x72, 0xd4, 0xa4, 0x0d, 0x97, 0x36, 0x2b, 0x4b, 0x71, 0x72,
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-	0xa8, 0xee, 0xb2, 0x5f, 0x75, 0xc5, 0x2e, 0x96, 0x6e, 0x03, 0x20, 0x4d, 0xf6, 0x46, 0x81, 0x59,
-	0xdd, 0xdb, 0x2b, 0x0e, 0xe1, 0x5f, 0xca, 0x5b, 0x6e, 0xd1, 0xa0, 0xbf, 0x3c, 0x2f, 0xe6, 0xb0,
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-	0xf4, 0x06, 0x98, 0xd4, 0x06, 0x92, 0x05, 0x60, 0xd4, 0xf9, 0x81, 0x52, 0xbf, 0x76, 0x13, 0x80,
-	0xf8, 0xdf, 0x30, 0xc1, 0x29, 0x90, 0x3f, 0xd8, 0xdd, 0x7f, 0x52, 0xb9, 0xbf, 0x53, 0xdd, 0xa9,
-	0x3c, 0x28, 0x0e, 0xc1, 0x02, 0x18, 0x7b, 0xe2, 0xee, 0x3d, 0xdd, 0x2b, 0x1f, 0x54, 0x8b, 0x06,
-	0x1c, 0x03, 0xc3, 0x8f, 0xf6, 0xf7, 0x76, 0x8b, 0xb9, 0x6b, 0xf7, 0x40, 0x5e, 0x9e, 0x07, 0x4e,
-	0x81, 0x7c, 0x75, 0xcf, 0xad, 0xec, 0x3c, 0xdc, 0xad, 0xd1, 0x48, 0x25, 0x03, 0x8d, 0x58, 0x31,
-	0x3c, 0x2f, 0xe6, 0xca, 0x17, 0xc1, 0x85, 0x7a, 0xd0, 0x4a, 0xfc, 0x61, 0x26, 0x25, 0xe7, 0xc5,
-	0x08, 0xb1, 0x6e, 0xfc, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x33, 0xc2, 0x0c, 0xb6, 0xeb, 0x26, 0x00,
-	0x00,
-}
diff --git a/_conformance/Makefile b/conformance/Makefile
similarity index 76%
rename from _conformance/Makefile
rename to conformance/Makefile
index 89800e2..b99e4ed 100644
--- a/_conformance/Makefile
+++ b/conformance/Makefile
@@ -29,5 +29,21 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-regenerate:
-	protoc --go_out=Mgoogle/protobuf/any.proto=github.com/golang/protobuf/ptypes/any,Mgoogle/protobuf/duration.proto=github.com/golang/protobuf/ptypes/duration,Mgoogle/protobuf/struct.proto=github.com/golang/protobuf/ptypes/struct,Mgoogle/protobuf/timestamp.proto=github.com/golang/protobuf/ptypes/timestamp,Mgoogle/protobuf/wrappers.proto=github.com/golang/protobuf/ptypes/wrappers,Mgoogle/protobuf/field_mask.proto=google.golang.org/genproto/protobuf:. conformance_proto/conformance.proto
+PROTOBUF_ROOT=$(HOME)/src/protobuf
+
+all:
+	@echo To run the tests in this directory, acquire the main protobuf
+	@echo distribution from:
+	@echo
+	@echo '   https://github.com/google/protobuf'
+	@echo
+	@echo Build the test runner with:
+	@echo
+	@echo '   cd conformance && make conformance-test-runner'
+	@echo
+	@echo And run the tests in this directory with:
+	@echo
+	@echo '   make test PROTOBUF_ROOT=<protobuf distribution>'
+
+test:
+	./test.sh $(PROTOBUF_ROOT)
diff --git a/_conformance/conformance.go b/conformance/conformance.go
similarity index 94%
rename from _conformance/conformance.go
rename to conformance/conformance.go
index c54212c..3029312 100644
--- a/_conformance/conformance.go
+++ b/conformance/conformance.go
@@ -39,7 +39,7 @@
 	"io"
 	"os"
 
-	pb "github.com/golang/protobuf/_conformance/conformance_proto"
+	pb "github.com/golang/protobuf/conformance/internal/conformance_proto"
 	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
 )
@@ -101,13 +101,6 @@
 		err = proto.Unmarshal(p.ProtobufPayload, &msg)
 	case *pb.ConformanceRequest_JsonPayload:
 		err = jsonpb.UnmarshalString(p.JsonPayload, &msg)
-		if err != nil && err.Error() == "unmarshaling Any not supported yet" {
-			return &pb.ConformanceResponse{
-				Result: &pb.ConformanceResponse_Skipped{
-					Skipped: err.Error(),
-				},
-			}
-		}
 	default:
 		return &pb.ConformanceResponse{
 			Result: &pb.ConformanceResponse_RuntimeError{
diff --git a/conformance/conformance.sh b/conformance/conformance.sh
new file mode 100755
index 0000000..8532f57
--- /dev/null
+++ b/conformance/conformance.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd $(dirname $0)
+exec go run conformance.go $*
diff --git a/conformance/failure_list_go.txt b/conformance/failure_list_go.txt
new file mode 100644
index 0000000..d372808
--- /dev/null
+++ b/conformance/failure_list_go.txt
@@ -0,0 +1,61 @@
+# This is the list of conformance tests that are known ot fail right now.
+# TODO: These should be fixed.
+
+DurationProtoInputTooLarge.JsonOutput
+DurationProtoInputTooSmall.JsonOutput
+FieldMaskNumbersDontRoundTrip.JsonOutput
+FieldMaskPathsDontRoundTrip.JsonOutput
+FieldMaskTooManyUnderscore.JsonOutput
+JsonInput.AnyWithFieldMask.JsonOutput
+JsonInput.AnyWithFieldMask.ProtobufOutput
+JsonInput.DoubleFieldQuotedValue.JsonOutput
+JsonInput.DoubleFieldQuotedValue.ProtobufOutput
+JsonInput.DurationHas3FractionalDigits.Validator
+JsonInput.DurationHas6FractionalDigits.Validator
+JsonInput.DurationHas9FractionalDigits.Validator
+JsonInput.DurationHasZeroFractionalDigit.Validator
+JsonInput.DurationMaxValue.JsonOutput
+JsonInput.DurationMaxValue.ProtobufOutput
+JsonInput.DurationMinValue.JsonOutput
+JsonInput.DurationMinValue.ProtobufOutput
+JsonInput.EnumFieldUnknownValue.Validator
+JsonInput.FieldMask.JsonOutput
+JsonInput.FieldMask.ProtobufOutput
+JsonInput.FieldNameInLowerCamelCase.Validator
+JsonInput.FieldNameWithMixedCases.JsonOutput
+JsonInput.FieldNameWithMixedCases.ProtobufOutput
+JsonInput.FieldNameWithMixedCases.Validator
+JsonInput.FieldNameWithNumbers.Validator
+JsonInput.FloatFieldQuotedValue.JsonOutput
+JsonInput.FloatFieldQuotedValue.ProtobufOutput
+JsonInput.Int32FieldExponentialFormat.JsonOutput
+JsonInput.Int32FieldExponentialFormat.ProtobufOutput
+JsonInput.Int32FieldFloatTrailingZero.JsonOutput
+JsonInput.Int32FieldFloatTrailingZero.ProtobufOutput
+JsonInput.Int32FieldMaxFloatValue.JsonOutput
+JsonInput.Int32FieldMaxFloatValue.ProtobufOutput
+JsonInput.Int32FieldMinFloatValue.JsonOutput
+JsonInput.Int32FieldMinFloatValue.ProtobufOutput
+JsonInput.Int32FieldStringValue.JsonOutput
+JsonInput.Int32FieldStringValue.ProtobufOutput
+JsonInput.Int32FieldStringValueEscaped.JsonOutput
+JsonInput.Int32FieldStringValueEscaped.ProtobufOutput
+JsonInput.Int64FieldBeString.Validator
+JsonInput.MapFieldValueIsNull
+JsonInput.OneofFieldDuplicate
+JsonInput.RepeatedFieldMessageElementIsNull
+JsonInput.RepeatedFieldPrimitiveElementIsNull
+JsonInput.StringFieldSurrogateInWrongOrder
+JsonInput.StringFieldUnpairedHighSurrogate
+JsonInput.StringFieldUnpairedLowSurrogate
+JsonInput.TimestampHas3FractionalDigits.Validator
+JsonInput.TimestampHas6FractionalDigits.Validator
+JsonInput.TimestampHas9FractionalDigits.Validator
+JsonInput.TimestampHasZeroFractionalDigit.Validator
+JsonInput.TimestampJsonInputTooSmall
+JsonInput.TimestampZeroNormalized.Validator
+JsonInput.Uint32FieldMaxFloatValue.JsonOutput
+JsonInput.Uint32FieldMaxFloatValue.ProtobufOutput
+JsonInput.Uint64FieldBeString.Validator
+TimestampProtoInputTooLarge.JsonOutput
+TimestampProtoInputTooSmall.JsonOutput
diff --git a/conformance/internal/conformance_proto/conformance.pb.go b/conformance/internal/conformance_proto/conformance.pb.go
new file mode 100644
index 0000000..82d4541
--- /dev/null
+++ b/conformance/internal/conformance_proto/conformance.pb.go
@@ -0,0 +1,1816 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: conformance.proto
+
+package conformance
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import any "github.com/golang/protobuf/ptypes/any"
+import duration "github.com/golang/protobuf/ptypes/duration"
+import _struct "github.com/golang/protobuf/ptypes/struct"
+import timestamp "github.com/golang/protobuf/ptypes/timestamp"
+import wrappers "github.com/golang/protobuf/ptypes/wrappers"
+import field_mask "google.golang.org/genproto/protobuf/field_mask"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type WireFormat int32
+
+const (
+	WireFormat_UNSPECIFIED WireFormat = 0
+	WireFormat_PROTOBUF    WireFormat = 1
+	WireFormat_JSON        WireFormat = 2
+)
+
+var WireFormat_name = map[int32]string{
+	0: "UNSPECIFIED",
+	1: "PROTOBUF",
+	2: "JSON",
+}
+var WireFormat_value = map[string]int32{
+	"UNSPECIFIED": 0,
+	"PROTOBUF":    1,
+	"JSON":        2,
+}
+
+func (x WireFormat) String() string {
+	return proto.EnumName(WireFormat_name, int32(x))
+}
+func (WireFormat) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{0}
+}
+
+type ForeignEnum int32
+
+const (
+	ForeignEnum_FOREIGN_FOO ForeignEnum = 0
+	ForeignEnum_FOREIGN_BAR ForeignEnum = 1
+	ForeignEnum_FOREIGN_BAZ ForeignEnum = 2
+)
+
+var ForeignEnum_name = map[int32]string{
+	0: "FOREIGN_FOO",
+	1: "FOREIGN_BAR",
+	2: "FOREIGN_BAZ",
+}
+var ForeignEnum_value = map[string]int32{
+	"FOREIGN_FOO": 0,
+	"FOREIGN_BAR": 1,
+	"FOREIGN_BAZ": 2,
+}
+
+func (x ForeignEnum) String() string {
+	return proto.EnumName(ForeignEnum_name, int32(x))
+}
+func (ForeignEnum) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{1}
+}
+
+type TestAllTypes_NestedEnum int32
+
+const (
+	TestAllTypes_FOO TestAllTypes_NestedEnum = 0
+	TestAllTypes_BAR TestAllTypes_NestedEnum = 1
+	TestAllTypes_BAZ TestAllTypes_NestedEnum = 2
+	TestAllTypes_NEG TestAllTypes_NestedEnum = -1
+)
+
+var TestAllTypes_NestedEnum_name = map[int32]string{
+	0:  "FOO",
+	1:  "BAR",
+	2:  "BAZ",
+	-1: "NEG",
+}
+var TestAllTypes_NestedEnum_value = map[string]int32{
+	"FOO": 0,
+	"BAR": 1,
+	"BAZ": 2,
+	"NEG": -1,
+}
+
+func (x TestAllTypes_NestedEnum) String() string {
+	return proto.EnumName(TestAllTypes_NestedEnum_name, int32(x))
+}
+func (TestAllTypes_NestedEnum) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{2, 0}
+}
+
+// Represents a single test case's input.  The testee should:
+//
+//   1. parse this proto (which should always succeed)
+//   2. parse the protobuf or JSON payload in "payload" (which may fail)
+//   3. if the parse succeeded, serialize the message in the requested format.
+type ConformanceRequest struct {
+	// The payload (whether protobuf of JSON) is always for a TestAllTypes proto
+	// (see below).
+	//
+	// Types that are valid to be assigned to Payload:
+	//	*ConformanceRequest_ProtobufPayload
+	//	*ConformanceRequest_JsonPayload
+	Payload isConformanceRequest_Payload `protobuf_oneof:"payload"`
+	// Which format should the testee serialize its message to?
+	RequestedOutputFormat WireFormat `protobuf:"varint,3,opt,name=requested_output_format,json=requestedOutputFormat,enum=conformance.WireFormat" json:"requested_output_format,omitempty"`
+	XXX_NoUnkeyedLiteral  struct{}   `json:"-"`
+	XXX_unrecognized      []byte     `json:"-"`
+	XXX_sizecache         int32      `json:"-"`
+}
+
+func (m *ConformanceRequest) Reset()         { *m = ConformanceRequest{} }
+func (m *ConformanceRequest) String() string { return proto.CompactTextString(m) }
+func (*ConformanceRequest) ProtoMessage()    {}
+func (*ConformanceRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{0}
+}
+func (m *ConformanceRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ConformanceRequest.Unmarshal(m, b)
+}
+func (m *ConformanceRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ConformanceRequest.Marshal(b, m, deterministic)
+}
+func (dst *ConformanceRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ConformanceRequest.Merge(dst, src)
+}
+func (m *ConformanceRequest) XXX_Size() int {
+	return xxx_messageInfo_ConformanceRequest.Size(m)
+}
+func (m *ConformanceRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ConformanceRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ConformanceRequest proto.InternalMessageInfo
+
+type isConformanceRequest_Payload interface {
+	isConformanceRequest_Payload()
+}
+
+type ConformanceRequest_ProtobufPayload struct {
+	ProtobufPayload []byte `protobuf:"bytes,1,opt,name=protobuf_payload,json=protobufPayload,proto3,oneof"`
+}
+type ConformanceRequest_JsonPayload struct {
+	JsonPayload string `protobuf:"bytes,2,opt,name=json_payload,json=jsonPayload,oneof"`
+}
+
+func (*ConformanceRequest_ProtobufPayload) isConformanceRequest_Payload() {}
+func (*ConformanceRequest_JsonPayload) isConformanceRequest_Payload()     {}
+
+func (m *ConformanceRequest) GetPayload() isConformanceRequest_Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *ConformanceRequest) GetProtobufPayload() []byte {
+	if x, ok := m.GetPayload().(*ConformanceRequest_ProtobufPayload); ok {
+		return x.ProtobufPayload
+	}
+	return nil
+}
+
+func (m *ConformanceRequest) GetJsonPayload() string {
+	if x, ok := m.GetPayload().(*ConformanceRequest_JsonPayload); ok {
+		return x.JsonPayload
+	}
+	return ""
+}
+
+func (m *ConformanceRequest) GetRequestedOutputFormat() WireFormat {
+	if m != nil {
+		return m.RequestedOutputFormat
+	}
+	return WireFormat_UNSPECIFIED
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ConformanceRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ConformanceRequest_OneofMarshaler, _ConformanceRequest_OneofUnmarshaler, _ConformanceRequest_OneofSizer, []interface{}{
+		(*ConformanceRequest_ProtobufPayload)(nil),
+		(*ConformanceRequest_JsonPayload)(nil),
+	}
+}
+
+func _ConformanceRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ConformanceRequest)
+	// payload
+	switch x := m.Payload.(type) {
+	case *ConformanceRequest_ProtobufPayload:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		b.EncodeRawBytes(x.ProtobufPayload)
+	case *ConformanceRequest_JsonPayload:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.JsonPayload)
+	case nil:
+	default:
+		return fmt.Errorf("ConformanceRequest.Payload has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ConformanceRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ConformanceRequest)
+	switch tag {
+	case 1: // payload.protobuf_payload
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeRawBytes(true)
+		m.Payload = &ConformanceRequest_ProtobufPayload{x}
+		return true, err
+	case 2: // payload.json_payload
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Payload = &ConformanceRequest_JsonPayload{x}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ConformanceRequest_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ConformanceRequest)
+	// payload
+	switch x := m.Payload.(type) {
+	case *ConformanceRequest_ProtobufPayload:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.ProtobufPayload)))
+		n += len(x.ProtobufPayload)
+	case *ConformanceRequest_JsonPayload:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.JsonPayload)))
+		n += len(x.JsonPayload)
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// Represents a single test case's output.
+type ConformanceResponse struct {
+	// Types that are valid to be assigned to Result:
+	//	*ConformanceResponse_ParseError
+	//	*ConformanceResponse_SerializeError
+	//	*ConformanceResponse_RuntimeError
+	//	*ConformanceResponse_ProtobufPayload
+	//	*ConformanceResponse_JsonPayload
+	//	*ConformanceResponse_Skipped
+	Result               isConformanceResponse_Result `protobuf_oneof:"result"`
+	XXX_NoUnkeyedLiteral struct{}                     `json:"-"`
+	XXX_unrecognized     []byte                       `json:"-"`
+	XXX_sizecache        int32                        `json:"-"`
+}
+
+func (m *ConformanceResponse) Reset()         { *m = ConformanceResponse{} }
+func (m *ConformanceResponse) String() string { return proto.CompactTextString(m) }
+func (*ConformanceResponse) ProtoMessage()    {}
+func (*ConformanceResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{1}
+}
+func (m *ConformanceResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ConformanceResponse.Unmarshal(m, b)
+}
+func (m *ConformanceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ConformanceResponse.Marshal(b, m, deterministic)
+}
+func (dst *ConformanceResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ConformanceResponse.Merge(dst, src)
+}
+func (m *ConformanceResponse) XXX_Size() int {
+	return xxx_messageInfo_ConformanceResponse.Size(m)
+}
+func (m *ConformanceResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ConformanceResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ConformanceResponse proto.InternalMessageInfo
+
+type isConformanceResponse_Result interface {
+	isConformanceResponse_Result()
+}
+
+type ConformanceResponse_ParseError struct {
+	ParseError string `protobuf:"bytes,1,opt,name=parse_error,json=parseError,oneof"`
+}
+type ConformanceResponse_SerializeError struct {
+	SerializeError string `protobuf:"bytes,6,opt,name=serialize_error,json=serializeError,oneof"`
+}
+type ConformanceResponse_RuntimeError struct {
+	RuntimeError string `protobuf:"bytes,2,opt,name=runtime_error,json=runtimeError,oneof"`
+}
+type ConformanceResponse_ProtobufPayload struct {
+	ProtobufPayload []byte `protobuf:"bytes,3,opt,name=protobuf_payload,json=protobufPayload,proto3,oneof"`
+}
+type ConformanceResponse_JsonPayload struct {
+	JsonPayload string `protobuf:"bytes,4,opt,name=json_payload,json=jsonPayload,oneof"`
+}
+type ConformanceResponse_Skipped struct {
+	Skipped string `protobuf:"bytes,5,opt,name=skipped,oneof"`
+}
+
+func (*ConformanceResponse_ParseError) isConformanceResponse_Result()      {}
+func (*ConformanceResponse_SerializeError) isConformanceResponse_Result()  {}
+func (*ConformanceResponse_RuntimeError) isConformanceResponse_Result()    {}
+func (*ConformanceResponse_ProtobufPayload) isConformanceResponse_Result() {}
+func (*ConformanceResponse_JsonPayload) isConformanceResponse_Result()     {}
+func (*ConformanceResponse_Skipped) isConformanceResponse_Result()         {}
+
+func (m *ConformanceResponse) GetResult() isConformanceResponse_Result {
+	if m != nil {
+		return m.Result
+	}
+	return nil
+}
+
+func (m *ConformanceResponse) GetParseError() string {
+	if x, ok := m.GetResult().(*ConformanceResponse_ParseError); ok {
+		return x.ParseError
+	}
+	return ""
+}
+
+func (m *ConformanceResponse) GetSerializeError() string {
+	if x, ok := m.GetResult().(*ConformanceResponse_SerializeError); ok {
+		return x.SerializeError
+	}
+	return ""
+}
+
+func (m *ConformanceResponse) GetRuntimeError() string {
+	if x, ok := m.GetResult().(*ConformanceResponse_RuntimeError); ok {
+		return x.RuntimeError
+	}
+	return ""
+}
+
+func (m *ConformanceResponse) GetProtobufPayload() []byte {
+	if x, ok := m.GetResult().(*ConformanceResponse_ProtobufPayload); ok {
+		return x.ProtobufPayload
+	}
+	return nil
+}
+
+func (m *ConformanceResponse) GetJsonPayload() string {
+	if x, ok := m.GetResult().(*ConformanceResponse_JsonPayload); ok {
+		return x.JsonPayload
+	}
+	return ""
+}
+
+func (m *ConformanceResponse) GetSkipped() string {
+	if x, ok := m.GetResult().(*ConformanceResponse_Skipped); ok {
+		return x.Skipped
+	}
+	return ""
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ConformanceResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ConformanceResponse_OneofMarshaler, _ConformanceResponse_OneofUnmarshaler, _ConformanceResponse_OneofSizer, []interface{}{
+		(*ConformanceResponse_ParseError)(nil),
+		(*ConformanceResponse_SerializeError)(nil),
+		(*ConformanceResponse_RuntimeError)(nil),
+		(*ConformanceResponse_ProtobufPayload)(nil),
+		(*ConformanceResponse_JsonPayload)(nil),
+		(*ConformanceResponse_Skipped)(nil),
+	}
+}
+
+func _ConformanceResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ConformanceResponse)
+	// result
+	switch x := m.Result.(type) {
+	case *ConformanceResponse_ParseError:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.ParseError)
+	case *ConformanceResponse_SerializeError:
+		b.EncodeVarint(6<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.SerializeError)
+	case *ConformanceResponse_RuntimeError:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.RuntimeError)
+	case *ConformanceResponse_ProtobufPayload:
+		b.EncodeVarint(3<<3 | proto.WireBytes)
+		b.EncodeRawBytes(x.ProtobufPayload)
+	case *ConformanceResponse_JsonPayload:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.JsonPayload)
+	case *ConformanceResponse_Skipped:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.Skipped)
+	case nil:
+	default:
+		return fmt.Errorf("ConformanceResponse.Result has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ConformanceResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ConformanceResponse)
+	switch tag {
+	case 1: // result.parse_error
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Result = &ConformanceResponse_ParseError{x}
+		return true, err
+	case 6: // result.serialize_error
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Result = &ConformanceResponse_SerializeError{x}
+		return true, err
+	case 2: // result.runtime_error
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Result = &ConformanceResponse_RuntimeError{x}
+		return true, err
+	case 3: // result.protobuf_payload
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeRawBytes(true)
+		m.Result = &ConformanceResponse_ProtobufPayload{x}
+		return true, err
+	case 4: // result.json_payload
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Result = &ConformanceResponse_JsonPayload{x}
+		return true, err
+	case 5: // result.skipped
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Result = &ConformanceResponse_Skipped{x}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ConformanceResponse_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ConformanceResponse)
+	// result
+	switch x := m.Result.(type) {
+	case *ConformanceResponse_ParseError:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.ParseError)))
+		n += len(x.ParseError)
+	case *ConformanceResponse_SerializeError:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.SerializeError)))
+		n += len(x.SerializeError)
+	case *ConformanceResponse_RuntimeError:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.RuntimeError)))
+		n += len(x.RuntimeError)
+	case *ConformanceResponse_ProtobufPayload:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.ProtobufPayload)))
+		n += len(x.ProtobufPayload)
+	case *ConformanceResponse_JsonPayload:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.JsonPayload)))
+		n += len(x.JsonPayload)
+	case *ConformanceResponse_Skipped:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.Skipped)))
+		n += len(x.Skipped)
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// This proto includes every type of field in both singular and repeated
+// forms.
+type TestAllTypes struct {
+	// Singular
+	OptionalInt32          int32                       `protobuf:"varint,1,opt,name=optional_int32,json=optionalInt32" json:"optional_int32,omitempty"`
+	OptionalInt64          int64                       `protobuf:"varint,2,opt,name=optional_int64,json=optionalInt64" json:"optional_int64,omitempty"`
+	OptionalUint32         uint32                      `protobuf:"varint,3,opt,name=optional_uint32,json=optionalUint32" json:"optional_uint32,omitempty"`
+	OptionalUint64         uint64                      `protobuf:"varint,4,opt,name=optional_uint64,json=optionalUint64" json:"optional_uint64,omitempty"`
+	OptionalSint32         int32                       `protobuf:"zigzag32,5,opt,name=optional_sint32,json=optionalSint32" json:"optional_sint32,omitempty"`
+	OptionalSint64         int64                       `protobuf:"zigzag64,6,opt,name=optional_sint64,json=optionalSint64" json:"optional_sint64,omitempty"`
+	OptionalFixed32        uint32                      `protobuf:"fixed32,7,opt,name=optional_fixed32,json=optionalFixed32" json:"optional_fixed32,omitempty"`
+	OptionalFixed64        uint64                      `protobuf:"fixed64,8,opt,name=optional_fixed64,json=optionalFixed64" json:"optional_fixed64,omitempty"`
+	OptionalSfixed32       int32                       `protobuf:"fixed32,9,opt,name=optional_sfixed32,json=optionalSfixed32" json:"optional_sfixed32,omitempty"`
+	OptionalSfixed64       int64                       `protobuf:"fixed64,10,opt,name=optional_sfixed64,json=optionalSfixed64" json:"optional_sfixed64,omitempty"`
+	OptionalFloat          float32                     `protobuf:"fixed32,11,opt,name=optional_float,json=optionalFloat" json:"optional_float,omitempty"`
+	OptionalDouble         float64                     `protobuf:"fixed64,12,opt,name=optional_double,json=optionalDouble" json:"optional_double,omitempty"`
+	OptionalBool           bool                        `protobuf:"varint,13,opt,name=optional_bool,json=optionalBool" json:"optional_bool,omitempty"`
+	OptionalString         string                      `protobuf:"bytes,14,opt,name=optional_string,json=optionalString" json:"optional_string,omitempty"`
+	OptionalBytes          []byte                      `protobuf:"bytes,15,opt,name=optional_bytes,json=optionalBytes,proto3" json:"optional_bytes,omitempty"`
+	OptionalNestedMessage  *TestAllTypes_NestedMessage `protobuf:"bytes,18,opt,name=optional_nested_message,json=optionalNestedMessage" json:"optional_nested_message,omitempty"`
+	OptionalForeignMessage *ForeignMessage             `protobuf:"bytes,19,opt,name=optional_foreign_message,json=optionalForeignMessage" json:"optional_foreign_message,omitempty"`
+	OptionalNestedEnum     TestAllTypes_NestedEnum     `protobuf:"varint,21,opt,name=optional_nested_enum,json=optionalNestedEnum,enum=conformance.TestAllTypes_NestedEnum" json:"optional_nested_enum,omitempty"`
+	OptionalForeignEnum    ForeignEnum                 `protobuf:"varint,22,opt,name=optional_foreign_enum,json=optionalForeignEnum,enum=conformance.ForeignEnum" json:"optional_foreign_enum,omitempty"`
+	OptionalStringPiece    string                      `protobuf:"bytes,24,opt,name=optional_string_piece,json=optionalStringPiece" json:"optional_string_piece,omitempty"`
+	OptionalCord           string                      `protobuf:"bytes,25,opt,name=optional_cord,json=optionalCord" json:"optional_cord,omitempty"`
+	RecursiveMessage       *TestAllTypes               `protobuf:"bytes,27,opt,name=recursive_message,json=recursiveMessage" json:"recursive_message,omitempty"`
+	// Repeated
+	RepeatedInt32          []int32                       `protobuf:"varint,31,rep,packed,name=repeated_int32,json=repeatedInt32" json:"repeated_int32,omitempty"`
+	RepeatedInt64          []int64                       `protobuf:"varint,32,rep,packed,name=repeated_int64,json=repeatedInt64" json:"repeated_int64,omitempty"`
+	RepeatedUint32         []uint32                      `protobuf:"varint,33,rep,packed,name=repeated_uint32,json=repeatedUint32" json:"repeated_uint32,omitempty"`
+	RepeatedUint64         []uint64                      `protobuf:"varint,34,rep,packed,name=repeated_uint64,json=repeatedUint64" json:"repeated_uint64,omitempty"`
+	RepeatedSint32         []int32                       `protobuf:"zigzag32,35,rep,packed,name=repeated_sint32,json=repeatedSint32" json:"repeated_sint32,omitempty"`
+	RepeatedSint64         []int64                       `protobuf:"zigzag64,36,rep,packed,name=repeated_sint64,json=repeatedSint64" json:"repeated_sint64,omitempty"`
+	RepeatedFixed32        []uint32                      `protobuf:"fixed32,37,rep,packed,name=repeated_fixed32,json=repeatedFixed32" json:"repeated_fixed32,omitempty"`
+	RepeatedFixed64        []uint64                      `protobuf:"fixed64,38,rep,packed,name=repeated_fixed64,json=repeatedFixed64" json:"repeated_fixed64,omitempty"`
+	RepeatedSfixed32       []int32                       `protobuf:"fixed32,39,rep,packed,name=repeated_sfixed32,json=repeatedSfixed32" json:"repeated_sfixed32,omitempty"`
+	RepeatedSfixed64       []int64                       `protobuf:"fixed64,40,rep,packed,name=repeated_sfixed64,json=repeatedSfixed64" json:"repeated_sfixed64,omitempty"`
+	RepeatedFloat          []float32                     `protobuf:"fixed32,41,rep,packed,name=repeated_float,json=repeatedFloat" json:"repeated_float,omitempty"`
+	RepeatedDouble         []float64                     `protobuf:"fixed64,42,rep,packed,name=repeated_double,json=repeatedDouble" json:"repeated_double,omitempty"`
+	RepeatedBool           []bool                        `protobuf:"varint,43,rep,packed,name=repeated_bool,json=repeatedBool" json:"repeated_bool,omitempty"`
+	RepeatedString         []string                      `protobuf:"bytes,44,rep,name=repeated_string,json=repeatedString" json:"repeated_string,omitempty"`
+	RepeatedBytes          [][]byte                      `protobuf:"bytes,45,rep,name=repeated_bytes,json=repeatedBytes,proto3" json:"repeated_bytes,omitempty"`
+	RepeatedNestedMessage  []*TestAllTypes_NestedMessage `protobuf:"bytes,48,rep,name=repeated_nested_message,json=repeatedNestedMessage" json:"repeated_nested_message,omitempty"`
+	RepeatedForeignMessage []*ForeignMessage             `protobuf:"bytes,49,rep,name=repeated_foreign_message,json=repeatedForeignMessage" json:"repeated_foreign_message,omitempty"`
+	RepeatedNestedEnum     []TestAllTypes_NestedEnum     `protobuf:"varint,51,rep,packed,name=repeated_nested_enum,json=repeatedNestedEnum,enum=conformance.TestAllTypes_NestedEnum" json:"repeated_nested_enum,omitempty"`
+	RepeatedForeignEnum    []ForeignEnum                 `protobuf:"varint,52,rep,packed,name=repeated_foreign_enum,json=repeatedForeignEnum,enum=conformance.ForeignEnum" json:"repeated_foreign_enum,omitempty"`
+	RepeatedStringPiece    []string                      `protobuf:"bytes,54,rep,name=repeated_string_piece,json=repeatedStringPiece" json:"repeated_string_piece,omitempty"`
+	RepeatedCord           []string                      `protobuf:"bytes,55,rep,name=repeated_cord,json=repeatedCord" json:"repeated_cord,omitempty"`
+	// Map
+	MapInt32Int32           map[int32]int32                        `protobuf:"bytes,56,rep,name=map_int32_int32,json=mapInt32Int32" json:"map_int32_int32,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	MapInt64Int64           map[int64]int64                        `protobuf:"bytes,57,rep,name=map_int64_int64,json=mapInt64Int64" json:"map_int64_int64,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	MapUint32Uint32         map[uint32]uint32                      `protobuf:"bytes,58,rep,name=map_uint32_uint32,json=mapUint32Uint32" json:"map_uint32_uint32,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	MapUint64Uint64         map[uint64]uint64                      `protobuf:"bytes,59,rep,name=map_uint64_uint64,json=mapUint64Uint64" json:"map_uint64_uint64,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	MapSint32Sint32         map[int32]int32                        `protobuf:"bytes,60,rep,name=map_sint32_sint32,json=mapSint32Sint32" json:"map_sint32_sint32,omitempty" protobuf_key:"zigzag32,1,opt,name=key" protobuf_val:"zigzag32,2,opt,name=value"`
+	MapSint64Sint64         map[int64]int64                        `protobuf:"bytes,61,rep,name=map_sint64_sint64,json=mapSint64Sint64" json:"map_sint64_sint64,omitempty" protobuf_key:"zigzag64,1,opt,name=key" protobuf_val:"zigzag64,2,opt,name=value"`
+	MapFixed32Fixed32       map[uint32]uint32                      `protobuf:"bytes,62,rep,name=map_fixed32_fixed32,json=mapFixed32Fixed32" json:"map_fixed32_fixed32,omitempty" protobuf_key:"fixed32,1,opt,name=key" protobuf_val:"fixed32,2,opt,name=value"`
+	MapFixed64Fixed64       map[uint64]uint64                      `protobuf:"bytes,63,rep,name=map_fixed64_fixed64,json=mapFixed64Fixed64" json:"map_fixed64_fixed64,omitempty" protobuf_key:"fixed64,1,opt,name=key" protobuf_val:"fixed64,2,opt,name=value"`
+	MapSfixed32Sfixed32     map[int32]int32                        `protobuf:"bytes,64,rep,name=map_sfixed32_sfixed32,json=mapSfixed32Sfixed32" json:"map_sfixed32_sfixed32,omitempty" protobuf_key:"fixed32,1,opt,name=key" protobuf_val:"fixed32,2,opt,name=value"`
+	MapSfixed64Sfixed64     map[int64]int64                        `protobuf:"bytes,65,rep,name=map_sfixed64_sfixed64,json=mapSfixed64Sfixed64" json:"map_sfixed64_sfixed64,omitempty" protobuf_key:"fixed64,1,opt,name=key" protobuf_val:"fixed64,2,opt,name=value"`
+	MapInt32Float           map[int32]float32                      `protobuf:"bytes,66,rep,name=map_int32_float,json=mapInt32Float" json:"map_int32_float,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"fixed32,2,opt,name=value"`
+	MapInt32Double          map[int32]float64                      `protobuf:"bytes,67,rep,name=map_int32_double,json=mapInt32Double" json:"map_int32_double,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"fixed64,2,opt,name=value"`
+	MapBoolBool             map[bool]bool                          `protobuf:"bytes,68,rep,name=map_bool_bool,json=mapBoolBool" json:"map_bool_bool,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	MapStringString         map[string]string                      `protobuf:"bytes,69,rep,name=map_string_string,json=mapStringString" json:"map_string_string,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	MapStringBytes          map[string][]byte                      `protobuf:"bytes,70,rep,name=map_string_bytes,json=mapStringBytes" json:"map_string_bytes,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	MapStringNestedMessage  map[string]*TestAllTypes_NestedMessage `protobuf:"bytes,71,rep,name=map_string_nested_message,json=mapStringNestedMessage" json:"map_string_nested_message,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	MapStringForeignMessage map[string]*ForeignMessage             `protobuf:"bytes,72,rep,name=map_string_foreign_message,json=mapStringForeignMessage" json:"map_string_foreign_message,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	MapStringNestedEnum     map[string]TestAllTypes_NestedEnum     `protobuf:"bytes,73,rep,name=map_string_nested_enum,json=mapStringNestedEnum" json:"map_string_nested_enum,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"varint,2,opt,name=value,enum=conformance.TestAllTypes_NestedEnum"`
+	MapStringForeignEnum    map[string]ForeignEnum                 `protobuf:"bytes,74,rep,name=map_string_foreign_enum,json=mapStringForeignEnum" json:"map_string_foreign_enum,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"varint,2,opt,name=value,enum=conformance.ForeignEnum"`
+	// Types that are valid to be assigned to OneofField:
+	//	*TestAllTypes_OneofUint32
+	//	*TestAllTypes_OneofNestedMessage
+	//	*TestAllTypes_OneofString
+	//	*TestAllTypes_OneofBytes
+	OneofField isTestAllTypes_OneofField `protobuf_oneof:"oneof_field"`
+	// Well-known types
+	OptionalBoolWrapper   *wrappers.BoolValue     `protobuf:"bytes,201,opt,name=optional_bool_wrapper,json=optionalBoolWrapper" json:"optional_bool_wrapper,omitempty"`
+	OptionalInt32Wrapper  *wrappers.Int32Value    `protobuf:"bytes,202,opt,name=optional_int32_wrapper,json=optionalInt32Wrapper" json:"optional_int32_wrapper,omitempty"`
+	OptionalInt64Wrapper  *wrappers.Int64Value    `protobuf:"bytes,203,opt,name=optional_int64_wrapper,json=optionalInt64Wrapper" json:"optional_int64_wrapper,omitempty"`
+	OptionalUint32Wrapper *wrappers.UInt32Value   `protobuf:"bytes,204,opt,name=optional_uint32_wrapper,json=optionalUint32Wrapper" json:"optional_uint32_wrapper,omitempty"`
+	OptionalUint64Wrapper *wrappers.UInt64Value   `protobuf:"bytes,205,opt,name=optional_uint64_wrapper,json=optionalUint64Wrapper" json:"optional_uint64_wrapper,omitempty"`
+	OptionalFloatWrapper  *wrappers.FloatValue    `protobuf:"bytes,206,opt,name=optional_float_wrapper,json=optionalFloatWrapper" json:"optional_float_wrapper,omitempty"`
+	OptionalDoubleWrapper *wrappers.DoubleValue   `protobuf:"bytes,207,opt,name=optional_double_wrapper,json=optionalDoubleWrapper" json:"optional_double_wrapper,omitempty"`
+	OptionalStringWrapper *wrappers.StringValue   `protobuf:"bytes,208,opt,name=optional_string_wrapper,json=optionalStringWrapper" json:"optional_string_wrapper,omitempty"`
+	OptionalBytesWrapper  *wrappers.BytesValue    `protobuf:"bytes,209,opt,name=optional_bytes_wrapper,json=optionalBytesWrapper" json:"optional_bytes_wrapper,omitempty"`
+	RepeatedBoolWrapper   []*wrappers.BoolValue   `protobuf:"bytes,211,rep,name=repeated_bool_wrapper,json=repeatedBoolWrapper" json:"repeated_bool_wrapper,omitempty"`
+	RepeatedInt32Wrapper  []*wrappers.Int32Value  `protobuf:"bytes,212,rep,name=repeated_int32_wrapper,json=repeatedInt32Wrapper" json:"repeated_int32_wrapper,omitempty"`
+	RepeatedInt64Wrapper  []*wrappers.Int64Value  `protobuf:"bytes,213,rep,name=repeated_int64_wrapper,json=repeatedInt64Wrapper" json:"repeated_int64_wrapper,omitempty"`
+	RepeatedUint32Wrapper []*wrappers.UInt32Value `protobuf:"bytes,214,rep,name=repeated_uint32_wrapper,json=repeatedUint32Wrapper" json:"repeated_uint32_wrapper,omitempty"`
+	RepeatedUint64Wrapper []*wrappers.UInt64Value `protobuf:"bytes,215,rep,name=repeated_uint64_wrapper,json=repeatedUint64Wrapper" json:"repeated_uint64_wrapper,omitempty"`
+	RepeatedFloatWrapper  []*wrappers.FloatValue  `protobuf:"bytes,216,rep,name=repeated_float_wrapper,json=repeatedFloatWrapper" json:"repeated_float_wrapper,omitempty"`
+	RepeatedDoubleWrapper []*wrappers.DoubleValue `protobuf:"bytes,217,rep,name=repeated_double_wrapper,json=repeatedDoubleWrapper" json:"repeated_double_wrapper,omitempty"`
+	RepeatedStringWrapper []*wrappers.StringValue `protobuf:"bytes,218,rep,name=repeated_string_wrapper,json=repeatedStringWrapper" json:"repeated_string_wrapper,omitempty"`
+	RepeatedBytesWrapper  []*wrappers.BytesValue  `protobuf:"bytes,219,rep,name=repeated_bytes_wrapper,json=repeatedBytesWrapper" json:"repeated_bytes_wrapper,omitempty"`
+	OptionalDuration      *duration.Duration      `protobuf:"bytes,301,opt,name=optional_duration,json=optionalDuration" json:"optional_duration,omitempty"`
+	OptionalTimestamp     *timestamp.Timestamp    `protobuf:"bytes,302,opt,name=optional_timestamp,json=optionalTimestamp" json:"optional_timestamp,omitempty"`
+	OptionalFieldMask     *field_mask.FieldMask   `protobuf:"bytes,303,opt,name=optional_field_mask,json=optionalFieldMask" json:"optional_field_mask,omitempty"`
+	OptionalStruct        *_struct.Struct         `protobuf:"bytes,304,opt,name=optional_struct,json=optionalStruct" json:"optional_struct,omitempty"`
+	OptionalAny           *any.Any                `protobuf:"bytes,305,opt,name=optional_any,json=optionalAny" json:"optional_any,omitempty"`
+	OptionalValue         *_struct.Value          `protobuf:"bytes,306,opt,name=optional_value,json=optionalValue" json:"optional_value,omitempty"`
+	RepeatedDuration      []*duration.Duration    `protobuf:"bytes,311,rep,name=repeated_duration,json=repeatedDuration" json:"repeated_duration,omitempty"`
+	RepeatedTimestamp     []*timestamp.Timestamp  `protobuf:"bytes,312,rep,name=repeated_timestamp,json=repeatedTimestamp" json:"repeated_timestamp,omitempty"`
+	RepeatedFieldmask     []*field_mask.FieldMask `protobuf:"bytes,313,rep,name=repeated_fieldmask,json=repeatedFieldmask" json:"repeated_fieldmask,omitempty"`
+	RepeatedStruct        []*_struct.Struct       `protobuf:"bytes,324,rep,name=repeated_struct,json=repeatedStruct" json:"repeated_struct,omitempty"`
+	RepeatedAny           []*any.Any              `protobuf:"bytes,315,rep,name=repeated_any,json=repeatedAny" json:"repeated_any,omitempty"`
+	RepeatedValue         []*_struct.Value        `protobuf:"bytes,316,rep,name=repeated_value,json=repeatedValue" json:"repeated_value,omitempty"`
+	// Test field-name-to-JSON-name convention.
+	Fieldname1           int32    `protobuf:"varint,401,opt,name=fieldname1" json:"fieldname1,omitempty"`
+	FieldName2           int32    `protobuf:"varint,402,opt,name=field_name2,json=fieldName2" json:"field_name2,omitempty"`
+	XFieldName3          int32    `protobuf:"varint,403,opt,name=_field_name3,json=FieldName3" json:"_field_name3,omitempty"`
+	Field_Name4_         int32    `protobuf:"varint,404,opt,name=field__name4_,json=fieldName4" json:"field__name4_,omitempty"`
+	Field0Name5          int32    `protobuf:"varint,405,opt,name=field0name5" json:"field0name5,omitempty"`
+	Field_0Name6         int32    `protobuf:"varint,406,opt,name=field_0_name6,json=field0Name6" json:"field_0_name6,omitempty"`
+	FieldName7           int32    `protobuf:"varint,407,opt,name=fieldName7" json:"fieldName7,omitempty"`
+	FieldName8           int32    `protobuf:"varint,408,opt,name=FieldName8" json:"FieldName8,omitempty"`
+	Field_Name9          int32    `protobuf:"varint,409,opt,name=field_Name9,json=fieldName9" json:"field_Name9,omitempty"`
+	Field_Name10         int32    `protobuf:"varint,410,opt,name=Field_Name10,json=FieldName10" json:"Field_Name10,omitempty"`
+	FIELD_NAME11         int32    `protobuf:"varint,411,opt,name=FIELD_NAME11,json=FIELDNAME11" json:"FIELD_NAME11,omitempty"`
+	FIELDName12          int32    `protobuf:"varint,412,opt,name=FIELD_name12,json=FIELDName12" json:"FIELD_name12,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *TestAllTypes) Reset()         { *m = TestAllTypes{} }
+func (m *TestAllTypes) String() string { return proto.CompactTextString(m) }
+func (*TestAllTypes) ProtoMessage()    {}
+func (*TestAllTypes) Descriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{2}
+}
+func (m *TestAllTypes) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_TestAllTypes.Unmarshal(m, b)
+}
+func (m *TestAllTypes) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_TestAllTypes.Marshal(b, m, deterministic)
+}
+func (dst *TestAllTypes) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_TestAllTypes.Merge(dst, src)
+}
+func (m *TestAllTypes) XXX_Size() int {
+	return xxx_messageInfo_TestAllTypes.Size(m)
+}
+func (m *TestAllTypes) XXX_DiscardUnknown() {
+	xxx_messageInfo_TestAllTypes.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_TestAllTypes proto.InternalMessageInfo
+
+type isTestAllTypes_OneofField interface {
+	isTestAllTypes_OneofField()
+}
+
+type TestAllTypes_OneofUint32 struct {
+	OneofUint32 uint32 `protobuf:"varint,111,opt,name=oneof_uint32,json=oneofUint32,oneof"`
+}
+type TestAllTypes_OneofNestedMessage struct {
+	OneofNestedMessage *TestAllTypes_NestedMessage `protobuf:"bytes,112,opt,name=oneof_nested_message,json=oneofNestedMessage,oneof"`
+}
+type TestAllTypes_OneofString struct {
+	OneofString string `protobuf:"bytes,113,opt,name=oneof_string,json=oneofString,oneof"`
+}
+type TestAllTypes_OneofBytes struct {
+	OneofBytes []byte `protobuf:"bytes,114,opt,name=oneof_bytes,json=oneofBytes,proto3,oneof"`
+}
+
+func (*TestAllTypes_OneofUint32) isTestAllTypes_OneofField()        {}
+func (*TestAllTypes_OneofNestedMessage) isTestAllTypes_OneofField() {}
+func (*TestAllTypes_OneofString) isTestAllTypes_OneofField()        {}
+func (*TestAllTypes_OneofBytes) isTestAllTypes_OneofField()         {}
+
+func (m *TestAllTypes) GetOneofField() isTestAllTypes_OneofField {
+	if m != nil {
+		return m.OneofField
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalInt32() int32 {
+	if m != nil {
+		return m.OptionalInt32
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalInt64() int64 {
+	if m != nil {
+		return m.OptionalInt64
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalUint32() uint32 {
+	if m != nil {
+		return m.OptionalUint32
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalUint64() uint64 {
+	if m != nil {
+		return m.OptionalUint64
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalSint32() int32 {
+	if m != nil {
+		return m.OptionalSint32
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalSint64() int64 {
+	if m != nil {
+		return m.OptionalSint64
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalFixed32() uint32 {
+	if m != nil {
+		return m.OptionalFixed32
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalFixed64() uint64 {
+	if m != nil {
+		return m.OptionalFixed64
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalSfixed32() int32 {
+	if m != nil {
+		return m.OptionalSfixed32
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalSfixed64() int64 {
+	if m != nil {
+		return m.OptionalSfixed64
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalFloat() float32 {
+	if m != nil {
+		return m.OptionalFloat
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalDouble() float64 {
+	if m != nil {
+		return m.OptionalDouble
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOptionalBool() bool {
+	if m != nil {
+		return m.OptionalBool
+	}
+	return false
+}
+
+func (m *TestAllTypes) GetOptionalString() string {
+	if m != nil {
+		return m.OptionalString
+	}
+	return ""
+}
+
+func (m *TestAllTypes) GetOptionalBytes() []byte {
+	if m != nil {
+		return m.OptionalBytes
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalNestedMessage() *TestAllTypes_NestedMessage {
+	if m != nil {
+		return m.OptionalNestedMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalForeignMessage() *ForeignMessage {
+	if m != nil {
+		return m.OptionalForeignMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalNestedEnum() TestAllTypes_NestedEnum {
+	if m != nil {
+		return m.OptionalNestedEnum
+	}
+	return TestAllTypes_FOO
+}
+
+func (m *TestAllTypes) GetOptionalForeignEnum() ForeignEnum {
+	if m != nil {
+		return m.OptionalForeignEnum
+	}
+	return ForeignEnum_FOREIGN_FOO
+}
+
+func (m *TestAllTypes) GetOptionalStringPiece() string {
+	if m != nil {
+		return m.OptionalStringPiece
+	}
+	return ""
+}
+
+func (m *TestAllTypes) GetOptionalCord() string {
+	if m != nil {
+		return m.OptionalCord
+	}
+	return ""
+}
+
+func (m *TestAllTypes) GetRecursiveMessage() *TestAllTypes {
+	if m != nil {
+		return m.RecursiveMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedInt32() []int32 {
+	if m != nil {
+		return m.RepeatedInt32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedInt64() []int64 {
+	if m != nil {
+		return m.RepeatedInt64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedUint32() []uint32 {
+	if m != nil {
+		return m.RepeatedUint32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedUint64() []uint64 {
+	if m != nil {
+		return m.RepeatedUint64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedSint32() []int32 {
+	if m != nil {
+		return m.RepeatedSint32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedSint64() []int64 {
+	if m != nil {
+		return m.RepeatedSint64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedFixed32() []uint32 {
+	if m != nil {
+		return m.RepeatedFixed32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedFixed64() []uint64 {
+	if m != nil {
+		return m.RepeatedFixed64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedSfixed32() []int32 {
+	if m != nil {
+		return m.RepeatedSfixed32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedSfixed64() []int64 {
+	if m != nil {
+		return m.RepeatedSfixed64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedFloat() []float32 {
+	if m != nil {
+		return m.RepeatedFloat
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedDouble() []float64 {
+	if m != nil {
+		return m.RepeatedDouble
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedBool() []bool {
+	if m != nil {
+		return m.RepeatedBool
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedString() []string {
+	if m != nil {
+		return m.RepeatedString
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedBytes() [][]byte {
+	if m != nil {
+		return m.RepeatedBytes
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedNestedMessage() []*TestAllTypes_NestedMessage {
+	if m != nil {
+		return m.RepeatedNestedMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedForeignMessage() []*ForeignMessage {
+	if m != nil {
+		return m.RepeatedForeignMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedNestedEnum() []TestAllTypes_NestedEnum {
+	if m != nil {
+		return m.RepeatedNestedEnum
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedForeignEnum() []ForeignEnum {
+	if m != nil {
+		return m.RepeatedForeignEnum
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedStringPiece() []string {
+	if m != nil {
+		return m.RepeatedStringPiece
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedCord() []string {
+	if m != nil {
+		return m.RepeatedCord
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapInt32Int32() map[int32]int32 {
+	if m != nil {
+		return m.MapInt32Int32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapInt64Int64() map[int64]int64 {
+	if m != nil {
+		return m.MapInt64Int64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapUint32Uint32() map[uint32]uint32 {
+	if m != nil {
+		return m.MapUint32Uint32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapUint64Uint64() map[uint64]uint64 {
+	if m != nil {
+		return m.MapUint64Uint64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapSint32Sint32() map[int32]int32 {
+	if m != nil {
+		return m.MapSint32Sint32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapSint64Sint64() map[int64]int64 {
+	if m != nil {
+		return m.MapSint64Sint64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapFixed32Fixed32() map[uint32]uint32 {
+	if m != nil {
+		return m.MapFixed32Fixed32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapFixed64Fixed64() map[uint64]uint64 {
+	if m != nil {
+		return m.MapFixed64Fixed64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapSfixed32Sfixed32() map[int32]int32 {
+	if m != nil {
+		return m.MapSfixed32Sfixed32
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapSfixed64Sfixed64() map[int64]int64 {
+	if m != nil {
+		return m.MapSfixed64Sfixed64
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapInt32Float() map[int32]float32 {
+	if m != nil {
+		return m.MapInt32Float
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapInt32Double() map[int32]float64 {
+	if m != nil {
+		return m.MapInt32Double
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapBoolBool() map[bool]bool {
+	if m != nil {
+		return m.MapBoolBool
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapStringString() map[string]string {
+	if m != nil {
+		return m.MapStringString
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapStringBytes() map[string][]byte {
+	if m != nil {
+		return m.MapStringBytes
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapStringNestedMessage() map[string]*TestAllTypes_NestedMessage {
+	if m != nil {
+		return m.MapStringNestedMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapStringForeignMessage() map[string]*ForeignMessage {
+	if m != nil {
+		return m.MapStringForeignMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapStringNestedEnum() map[string]TestAllTypes_NestedEnum {
+	if m != nil {
+		return m.MapStringNestedEnum
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetMapStringForeignEnum() map[string]ForeignEnum {
+	if m != nil {
+		return m.MapStringForeignEnum
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOneofUint32() uint32 {
+	if x, ok := m.GetOneofField().(*TestAllTypes_OneofUint32); ok {
+		return x.OneofUint32
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetOneofNestedMessage() *TestAllTypes_NestedMessage {
+	if x, ok := m.GetOneofField().(*TestAllTypes_OneofNestedMessage); ok {
+		return x.OneofNestedMessage
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOneofString() string {
+	if x, ok := m.GetOneofField().(*TestAllTypes_OneofString); ok {
+		return x.OneofString
+	}
+	return ""
+}
+
+func (m *TestAllTypes) GetOneofBytes() []byte {
+	if x, ok := m.GetOneofField().(*TestAllTypes_OneofBytes); ok {
+		return x.OneofBytes
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalBoolWrapper() *wrappers.BoolValue {
+	if m != nil {
+		return m.OptionalBoolWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalInt32Wrapper() *wrappers.Int32Value {
+	if m != nil {
+		return m.OptionalInt32Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalInt64Wrapper() *wrappers.Int64Value {
+	if m != nil {
+		return m.OptionalInt64Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalUint32Wrapper() *wrappers.UInt32Value {
+	if m != nil {
+		return m.OptionalUint32Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalUint64Wrapper() *wrappers.UInt64Value {
+	if m != nil {
+		return m.OptionalUint64Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalFloatWrapper() *wrappers.FloatValue {
+	if m != nil {
+		return m.OptionalFloatWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalDoubleWrapper() *wrappers.DoubleValue {
+	if m != nil {
+		return m.OptionalDoubleWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalStringWrapper() *wrappers.StringValue {
+	if m != nil {
+		return m.OptionalStringWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalBytesWrapper() *wrappers.BytesValue {
+	if m != nil {
+		return m.OptionalBytesWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedBoolWrapper() []*wrappers.BoolValue {
+	if m != nil {
+		return m.RepeatedBoolWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedInt32Wrapper() []*wrappers.Int32Value {
+	if m != nil {
+		return m.RepeatedInt32Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedInt64Wrapper() []*wrappers.Int64Value {
+	if m != nil {
+		return m.RepeatedInt64Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedUint32Wrapper() []*wrappers.UInt32Value {
+	if m != nil {
+		return m.RepeatedUint32Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedUint64Wrapper() []*wrappers.UInt64Value {
+	if m != nil {
+		return m.RepeatedUint64Wrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedFloatWrapper() []*wrappers.FloatValue {
+	if m != nil {
+		return m.RepeatedFloatWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedDoubleWrapper() []*wrappers.DoubleValue {
+	if m != nil {
+		return m.RepeatedDoubleWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedStringWrapper() []*wrappers.StringValue {
+	if m != nil {
+		return m.RepeatedStringWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedBytesWrapper() []*wrappers.BytesValue {
+	if m != nil {
+		return m.RepeatedBytesWrapper
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalDuration() *duration.Duration {
+	if m != nil {
+		return m.OptionalDuration
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalTimestamp() *timestamp.Timestamp {
+	if m != nil {
+		return m.OptionalTimestamp
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalFieldMask() *field_mask.FieldMask {
+	if m != nil {
+		return m.OptionalFieldMask
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalStruct() *_struct.Struct {
+	if m != nil {
+		return m.OptionalStruct
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalAny() *any.Any {
+	if m != nil {
+		return m.OptionalAny
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetOptionalValue() *_struct.Value {
+	if m != nil {
+		return m.OptionalValue
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedDuration() []*duration.Duration {
+	if m != nil {
+		return m.RepeatedDuration
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedTimestamp() []*timestamp.Timestamp {
+	if m != nil {
+		return m.RepeatedTimestamp
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedFieldmask() []*field_mask.FieldMask {
+	if m != nil {
+		return m.RepeatedFieldmask
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedStruct() []*_struct.Struct {
+	if m != nil {
+		return m.RepeatedStruct
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedAny() []*any.Any {
+	if m != nil {
+		return m.RepeatedAny
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetRepeatedValue() []*_struct.Value {
+	if m != nil {
+		return m.RepeatedValue
+	}
+	return nil
+}
+
+func (m *TestAllTypes) GetFieldname1() int32 {
+	if m != nil {
+		return m.Fieldname1
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetFieldName2() int32 {
+	if m != nil {
+		return m.FieldName2
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetXFieldName3() int32 {
+	if m != nil {
+		return m.XFieldName3
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetField_Name4_() int32 {
+	if m != nil {
+		return m.Field_Name4_
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetField0Name5() int32 {
+	if m != nil {
+		return m.Field0Name5
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetField_0Name6() int32 {
+	if m != nil {
+		return m.Field_0Name6
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetFieldName7() int32 {
+	if m != nil {
+		return m.FieldName7
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetFieldName8() int32 {
+	if m != nil {
+		return m.FieldName8
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetField_Name9() int32 {
+	if m != nil {
+		return m.Field_Name9
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetField_Name10() int32 {
+	if m != nil {
+		return m.Field_Name10
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetFIELD_NAME11() int32 {
+	if m != nil {
+		return m.FIELD_NAME11
+	}
+	return 0
+}
+
+func (m *TestAllTypes) GetFIELDName12() int32 {
+	if m != nil {
+		return m.FIELDName12
+	}
+	return 0
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*TestAllTypes) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _TestAllTypes_OneofMarshaler, _TestAllTypes_OneofUnmarshaler, _TestAllTypes_OneofSizer, []interface{}{
+		(*TestAllTypes_OneofUint32)(nil),
+		(*TestAllTypes_OneofNestedMessage)(nil),
+		(*TestAllTypes_OneofString)(nil),
+		(*TestAllTypes_OneofBytes)(nil),
+	}
+}
+
+func _TestAllTypes_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*TestAllTypes)
+	// oneof_field
+	switch x := m.OneofField.(type) {
+	case *TestAllTypes_OneofUint32:
+		b.EncodeVarint(111<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.OneofUint32))
+	case *TestAllTypes_OneofNestedMessage:
+		b.EncodeVarint(112<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.OneofNestedMessage); err != nil {
+			return err
+		}
+	case *TestAllTypes_OneofString:
+		b.EncodeVarint(113<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.OneofString)
+	case *TestAllTypes_OneofBytes:
+		b.EncodeVarint(114<<3 | proto.WireBytes)
+		b.EncodeRawBytes(x.OneofBytes)
+	case nil:
+	default:
+		return fmt.Errorf("TestAllTypes.OneofField has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _TestAllTypes_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*TestAllTypes)
+	switch tag {
+	case 111: // oneof_field.oneof_uint32
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.OneofField = &TestAllTypes_OneofUint32{uint32(x)}
+		return true, err
+	case 112: // oneof_field.oneof_nested_message
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(TestAllTypes_NestedMessage)
+		err := b.DecodeMessage(msg)
+		m.OneofField = &TestAllTypes_OneofNestedMessage{msg}
+		return true, err
+	case 113: // oneof_field.oneof_string
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.OneofField = &TestAllTypes_OneofString{x}
+		return true, err
+	case 114: // oneof_field.oneof_bytes
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeRawBytes(true)
+		m.OneofField = &TestAllTypes_OneofBytes{x}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _TestAllTypes_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*TestAllTypes)
+	// oneof_field
+	switch x := m.OneofField.(type) {
+	case *TestAllTypes_OneofUint32:
+		n += 2 // tag and wire
+		n += proto.SizeVarint(uint64(x.OneofUint32))
+	case *TestAllTypes_OneofNestedMessage:
+		s := proto.Size(x.OneofNestedMessage)
+		n += 2 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *TestAllTypes_OneofString:
+		n += 2 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.OneofString)))
+		n += len(x.OneofString)
+	case *TestAllTypes_OneofBytes:
+		n += 2 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.OneofBytes)))
+		n += len(x.OneofBytes)
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+type TestAllTypes_NestedMessage struct {
+	A                    int32         `protobuf:"varint,1,opt,name=a" json:"a,omitempty"`
+	Corecursive          *TestAllTypes `protobuf:"bytes,2,opt,name=corecursive" json:"corecursive,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}      `json:"-"`
+	XXX_unrecognized     []byte        `json:"-"`
+	XXX_sizecache        int32         `json:"-"`
+}
+
+func (m *TestAllTypes_NestedMessage) Reset()         { *m = TestAllTypes_NestedMessage{} }
+func (m *TestAllTypes_NestedMessage) String() string { return proto.CompactTextString(m) }
+func (*TestAllTypes_NestedMessage) ProtoMessage()    {}
+func (*TestAllTypes_NestedMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{2, 0}
+}
+func (m *TestAllTypes_NestedMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_TestAllTypes_NestedMessage.Unmarshal(m, b)
+}
+func (m *TestAllTypes_NestedMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_TestAllTypes_NestedMessage.Marshal(b, m, deterministic)
+}
+func (dst *TestAllTypes_NestedMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_TestAllTypes_NestedMessage.Merge(dst, src)
+}
+func (m *TestAllTypes_NestedMessage) XXX_Size() int {
+	return xxx_messageInfo_TestAllTypes_NestedMessage.Size(m)
+}
+func (m *TestAllTypes_NestedMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_TestAllTypes_NestedMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_TestAllTypes_NestedMessage proto.InternalMessageInfo
+
+func (m *TestAllTypes_NestedMessage) GetA() int32 {
+	if m != nil {
+		return m.A
+	}
+	return 0
+}
+
+func (m *TestAllTypes_NestedMessage) GetCorecursive() *TestAllTypes {
+	if m != nil {
+		return m.Corecursive
+	}
+	return nil
+}
+
+type ForeignMessage struct {
+	C                    int32    `protobuf:"varint,1,opt,name=c" json:"c,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ForeignMessage) Reset()         { *m = ForeignMessage{} }
+func (m *ForeignMessage) String() string { return proto.CompactTextString(m) }
+func (*ForeignMessage) ProtoMessage()    {}
+func (*ForeignMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_conformance_48ac832451f5d6c3, []int{3}
+}
+func (m *ForeignMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ForeignMessage.Unmarshal(m, b)
+}
+func (m *ForeignMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ForeignMessage.Marshal(b, m, deterministic)
+}
+func (dst *ForeignMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ForeignMessage.Merge(dst, src)
+}
+func (m *ForeignMessage) XXX_Size() int {
+	return xxx_messageInfo_ForeignMessage.Size(m)
+}
+func (m *ForeignMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_ForeignMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ForeignMessage proto.InternalMessageInfo
+
+func (m *ForeignMessage) GetC() int32 {
+	if m != nil {
+		return m.C
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*ConformanceRequest)(nil), "conformance.ConformanceRequest")
+	proto.RegisterType((*ConformanceResponse)(nil), "conformance.ConformanceResponse")
+	proto.RegisterType((*TestAllTypes)(nil), "conformance.TestAllTypes")
+	proto.RegisterMapType((map[bool]bool)(nil), "conformance.TestAllTypes.MapBoolBoolEntry")
+	proto.RegisterMapType((map[uint32]uint32)(nil), "conformance.TestAllTypes.MapFixed32Fixed32Entry")
+	proto.RegisterMapType((map[uint64]uint64)(nil), "conformance.TestAllTypes.MapFixed64Fixed64Entry")
+	proto.RegisterMapType((map[int32]float64)(nil), "conformance.TestAllTypes.MapInt32DoubleEntry")
+	proto.RegisterMapType((map[int32]float32)(nil), "conformance.TestAllTypes.MapInt32FloatEntry")
+	proto.RegisterMapType((map[int32]int32)(nil), "conformance.TestAllTypes.MapInt32Int32Entry")
+	proto.RegisterMapType((map[int64]int64)(nil), "conformance.TestAllTypes.MapInt64Int64Entry")
+	proto.RegisterMapType((map[int32]int32)(nil), "conformance.TestAllTypes.MapSfixed32Sfixed32Entry")
+	proto.RegisterMapType((map[int64]int64)(nil), "conformance.TestAllTypes.MapSfixed64Sfixed64Entry")
+	proto.RegisterMapType((map[int32]int32)(nil), "conformance.TestAllTypes.MapSint32Sint32Entry")
+	proto.RegisterMapType((map[int64]int64)(nil), "conformance.TestAllTypes.MapSint64Sint64Entry")
+	proto.RegisterMapType((map[string][]byte)(nil), "conformance.TestAllTypes.MapStringBytesEntry")
+	proto.RegisterMapType((map[string]ForeignEnum)(nil), "conformance.TestAllTypes.MapStringForeignEnumEntry")
+	proto.RegisterMapType((map[string]*ForeignMessage)(nil), "conformance.TestAllTypes.MapStringForeignMessageEntry")
+	proto.RegisterMapType((map[string]TestAllTypes_NestedEnum)(nil), "conformance.TestAllTypes.MapStringNestedEnumEntry")
+	proto.RegisterMapType((map[string]*TestAllTypes_NestedMessage)(nil), "conformance.TestAllTypes.MapStringNestedMessageEntry")
+	proto.RegisterMapType((map[string]string)(nil), "conformance.TestAllTypes.MapStringStringEntry")
+	proto.RegisterMapType((map[uint32]uint32)(nil), "conformance.TestAllTypes.MapUint32Uint32Entry")
+	proto.RegisterMapType((map[uint64]uint64)(nil), "conformance.TestAllTypes.MapUint64Uint64Entry")
+	proto.RegisterType((*TestAllTypes_NestedMessage)(nil), "conformance.TestAllTypes.NestedMessage")
+	proto.RegisterType((*ForeignMessage)(nil), "conformance.ForeignMessage")
+	proto.RegisterEnum("conformance.WireFormat", WireFormat_name, WireFormat_value)
+	proto.RegisterEnum("conformance.ForeignEnum", ForeignEnum_name, ForeignEnum_value)
+	proto.RegisterEnum("conformance.TestAllTypes_NestedEnum", TestAllTypes_NestedEnum_name, TestAllTypes_NestedEnum_value)
+}
+
+func init() { proto.RegisterFile("conformance.proto", fileDescriptor_conformance_48ac832451f5d6c3) }
+
+var fileDescriptor_conformance_48ac832451f5d6c3 = []byte{
+	// 2600 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x5a, 0x5b, 0x73, 0x13, 0xc9,
+	0x15, 0xf6, 0x68, 0xc0, 0x36, 0x2d, 0xd9, 0x96, 0xdb, 0xb7, 0xc6, 0x50, 0xcb, 0x60, 0x96, 0x20,
+	0x60, 0xd7, 0xeb, 0xcb, 0x30, 0x5c, 0x36, 0x4b, 0xb0, 0xc0, 0x02, 0x93, 0xc5, 0xa2, 0xc6, 0x78,
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+	0xd1, 0x92, 0x69, 0x13, 0xfa, 0xcd, 0x54, 0x69, 0xae, 0xf6, 0x9b, 0x29, 0xbc, 0x05, 0x44, 0x1b,
+	0xae, 0x11, 0x74, 0x8f, 0xd1, 0x8f, 0xe8, 0xfc, 0xf9, 0x81, 0xf9, 0x5b, 0xdd, 0x63, 0xbf, 0xc8,
+	0xa1, 0x5b, 0xdd, 0x63, 0x78, 0x57, 0x6a, 0xcb, 0x7e, 0x8c, 0xb7, 0x01, 0xfd, 0x98, 0xce, 0x5d,
+	0x1c, 0x98, 0x4b, 0x77, 0x49, 0x34, 0x02, 0xc9, 0x57, 0xbc, 0x3d, 0x59, 0x81, 0xf2, 0xed, 0xf9,
+	0x69, 0x81, 0xec, 0xf6, 0xb0, 0xed, 0x11, 0x75, 0x29, 0x6d, 0x8f, 0x20, 0xca, 0xb6, 0xe7, 0x67,
+	0x85, 0x1c, 0x85, 0x93, 0xb6, 0x87, 0x4f, 0xcb, 0xb6, 0x47, 0xe6, 0x22, 0xdb, 0x43, 0x76, 0xe7,
+	0xe7, 0x79, 0x5c, 0xd2, 0xee, 0x64, 0xfd, 0x33, 0x36, 0x0b, 0xef, 0x8e, 0xfc, 0xa8, 0xe0, 0xdd,
+	0xf9, 0x35, 0x25, 0xca, 0xdf, 0x1d, 0xe9, 0xe9, 0x60, 0xbb, 0x23, 0x28, 0xf0, 0xee, 0xfc, 0x82,
+	0xce, 0xcf, 0xd9, 0x1d, 0x0e, 0x65, 0xbb, 0x23, 0x66, 0xd2, 0xdd, 0xf9, 0x25, 0x9d, 0x9b, 0xbb,
+	0x3b, 0x1c, 0x4e, 0x77, 0xe7, 0x02, 0x00, 0x64, 0xfd, 0xdd, 0xa0, 0x13, 0xae, 0xa3, 0x2f, 0xd9,
+	0xe4, 0x8d, 0x8d, 0x64, 0x82, 0x0e, 0x28, 0xd2, 0xfa, 0xc5, 0x5f, 0x37, 0xd0, 0x97, 0x65, 0xc4,
+	0x2e, 0x36, 0xc1, 0x8b, 0xa0, 0xd4, 0xc8, 0x20, 0x9b, 0xe8, 0x2b, 0x0c, 0x52, 0xe3, 0x90, 0x4d,
+	0xb8, 0x02, 0xa6, 0x28, 0x82, 0x40, 0xdc, 0x06, 0xfa, 0xaa, 0x4e, 0xe3, 0xe2, 0xbf, 0xf1, 0xc8,
+	0xb7, 0x35, 0x0c, 0xb9, 0x81, 0xbe, 0x46, 0x11, 0xb2, 0x0d, 0x5e, 0xe2, 0x34, 0x6b, 0x84, 0xc7,
+	0x43, 0x5f, 0x57, 0x40, 0x98, 0xc7, 0x13, 0x2b, 0xc2, 0xdf, 0x6e, 0xa2, 0x6f, 0xe8, 0x8e, 0x6e,
+	0x62, 0x80, 0x08, 0xed, 0x16, 0xfa, 0xa6, 0x1e, 0xed, 0xad, 0x6c, 0xc9, 0xf8, 0xeb, 0x6d, 0xf4,
+	0x2d, 0x9d, 0xe2, 0x36, 0x5c, 0x01, 0xa5, 0x9a, 0x40, 0xac, 0xaf, 0xa1, 0x6f, 0xb3, 0x38, 0x04,
+	0xc9, 0xfa, 0x1a, 0xc1, 0xec, 0x6c, 0xbf, 0xff, 0xa0, 0xb1, 0xbb, 0xf5, 0x64, 0x7b, 0x7d, 0x1d,
+	0x7d, 0x87, 0x63, 0xb0, 0x91, 0xda, 0x32, 0x0c, 0xc9, 0xf5, 0x06, 0xfa, 0xae, 0x82, 0x21, 0xb6,
+	0xe5, 0x17, 0x60, 0x4a, 0xfd, 0x8b, 0xb9, 0x04, 0xac, 0x80, 0xbd, 0x5a, 0xb3, 0x02, 0xf8, 0x2e,
+	0x28, 0x36, 0x23, 0xd1, 0x1d, 0x47, 0x85, 0x93, 0x3a, 0xe9, 0x32, 0x7a, 0xf9, 0x1e, 0x80, 0x83,
+	0xdd, 0x2e, 0x58, 0x06, 0xf6, 0xab, 0xf0, 0x98, 0xb9, 0xc0, 0xbf, 0xc2, 0x79, 0x70, 0x9a, 0x16,
+	0x57, 0x81, 0xd8, 0xe8, 0x97, 0x3b, 0x85, 0x5b, 0x56, 0xc6, 0x20, 0x77, 0xb6, 0x64, 0x06, 0xdb,
+	0xc0, 0x60, 0xcb, 0x0c, 0x55, 0x30, 0x6f, 0xea, 0x61, 0xc9, 0x1c, 0x53, 0x06, 0x8e, 0x29, 0x33,
+	0x87, 0xd2, 0xab, 0x92, 0x39, 0x4e, 0x19, 0x38, 0x4e, 0x0d, 0x72, 0x0c, 0xf4, 0xa4, 0x64, 0x8e,
+	0x59, 0x03, 0xc7, 0xac, 0x99, 0x43, 0xe9, 0x3d, 0xc9, 0x1c, 0xd0, 0xc0, 0x01, 0x65, 0x8e, 0x07,
+	0x60, 0xd1, 0xdc, 0x61, 0x92, 0x59, 0x26, 0x0c, 0x2c, 0x13, 0x39, 0x2c, 0x6a, 0x17, 0x49, 0x66,
+	0x19, 0x37, 0xb0, 0x8c, 0xcb, 0x2c, 0x35, 0x80, 0xf2, 0xfa, 0x44, 0x32, 0xcf, 0x8c, 0x81, 0x67,
+	0x26, 0x8f, 0x47, 0xeb, 0x03, 0xc9, 0x3c, 0x65, 0x03, 0x4f, 0xd9, 0x58, 0x6d, 0x72, 0xb7, 0xe7,
+	0xa4, 0x7a, 0x2d, 0xc8, 0x0c, 0x5b, 0x60, 0xce, 0xd0, 0xd8, 0x39, 0x89, 0xc2, 0x92, 0x29, 0xee,
+	0x82, 0xb2, 0xde, 0xc5, 0x91, 0xe7, 0x4f, 0x1a, 0xe6, 0x4f, 0x1a, 0x8a, 0x44, 0xef, 0xd8, 0xc8,
+	0x1c, 0x67, 0x0c, 0x1c, 0x67, 0x06, 0x97, 0xa1, 0xb7, 0x66, 0x4e, 0xa2, 0x28, 0xc9, 0x14, 0x31,
+	0x38, 0x37, 0xa4, 0xf7, 0x62, 0xa0, 0x7a, 0x4f, 0xa6, 0x7a, 0x8d, 0x17, 0x1f, 0x92, 0xcf, 0x23,
+	0x70, 0x7e, 0x58, 0xf3, 0xc5, 0xe0, 0x74, 0x5d, 0x75, 0x3a, 0xf4, 0x5d, 0x88, 0xe4, 0xa8, 0x4d,
+	0x0b, 0xce, 0xd4, 0x74, 0x31, 0x38, 0xb9, 0x23, 0x3b, 0x19, 0xf5, 0xed, 0x88, 0xe4, 0x2d, 0x00,
+	0x67, 0x73, 0x1b, 0x2f, 0x06, 0x77, 0xab, 0xaa, 0xbb, 0xfc, 0x77, 0x26, 0x99, 0x8b, 0x95, 0xdb,
+	0x00, 0x48, 0x2d, 0xa2, 0x09, 0x60, 0xd7, 0xea, 0xf5, 0xf2, 0x18, 0xfe, 0xa5, 0xba, 0xe5, 0x97,
+	0x2d, 0xfa, 0xcb, 0x8b, 0x72, 0x01, 0xbb, 0xdb, 0xdd, 0x7e, 0x58, 0xfe, 0x1f, 0xff, 0xcf, 0xaa,
+	0x4e, 0xf1, 0xe6, 0x09, 0x39, 0xc0, 0x56, 0xde, 0x00, 0xd3, 0x5a, 0x67, 0xab, 0x04, 0xac, 0x26,
+	0x3f, 0x50, 0x9a, 0xd7, 0x6e, 0x00, 0x90, 0xfd, 0x63, 0x18, 0x38, 0x03, 0x8a, 0xfb, 0xbb, 0x7b,
+	0x4f, 0xb7, 0xef, 0xef, 0xd4, 0x76, 0xb6, 0x1f, 0x94, 0xc7, 0x60, 0x09, 0x4c, 0x3e, 0xf5, 0xeb,
+	0xcf, 0xea, 0xd5, 0xfd, 0x5a, 0xd9, 0x82, 0x93, 0xe0, 0xd4, 0xe3, 0xbd, 0xfa, 0x6e, 0xb9, 0x70,
+	0xed, 0x1e, 0x28, 0xca, 0x8d, 0xa5, 0x19, 0x50, 0xac, 0xd5, 0xfd, 0xed, 0x9d, 0x87, 0xbb, 0x0d,
+	0x1a, 0xa9, 0x64, 0xa0, 0x11, 0x2b, 0x86, 0x17, 0xe5, 0x42, 0xf5, 0x22, 0xb8, 0xd0, 0x8c, 0x3a,
+	0x03, 0x7f, 0xb6, 0x48, 0xc9, 0x79, 0x39, 0x4e, 0xac, 0x9b, 0xff, 0x0f, 0x00, 0x00, 0xff, 0xff,
+	0x29, 0x30, 0x51, 0x54, 0x22, 0x25, 0x00, 0x00,
+}
diff --git a/_conformance/conformance_proto/conformance.proto b/conformance/internal/conformance_proto/conformance.proto
similarity index 96%
rename from _conformance/conformance_proto/conformance.proto
rename to conformance/internal/conformance_proto/conformance.proto
index 95a8fd1..fc96074 100644
--- a/_conformance/conformance_proto/conformance.proto
+++ b/conformance/internal/conformance_proto/conformance.proto
@@ -210,11 +210,6 @@
     NestedMessage oneof_nested_message = 112;
     string oneof_string = 113;
     bytes oneof_bytes = 114;
-    bool oneof_bool = 115;
-    uint64 oneof_uint64 = 116;
-    float oneof_float = 117;
-    double oneof_double = 118;
-    NestedEnum oneof_enum = 119;
   }
 
   // Well-known types
@@ -253,7 +248,6 @@
   repeated google.protobuf.Value repeated_value = 316;
 
   // Test field-name-to-JSON-name convention.
-  // (protobuf says names can be any valid C/C++ identifier.)
   int32 fieldname1 = 401;
   int32 field_name2 = 402;
   int32 _field_name3 = 403;
@@ -266,12 +260,6 @@
   int32 Field_Name10 = 410;
   int32 FIELD_NAME11 = 411;
   int32 FIELD_name12 = 412;
-  int32 __field_name13 = 413;
-  int32 __Field_name14 = 414;
-  int32 field__name15 = 415;
-  int32 field__Name16 = 416;
-  int32 field_name17__ = 417;
-  int32 Field_name18__ = 418;
 }
 
 message ForeignMessage {
diff --git a/conformance/test.sh b/conformance/test.sh
new file mode 100755
index 0000000..e6de29b
--- /dev/null
+++ b/conformance/test.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+PROTOBUF_ROOT=$1
+CONFORMANCE_ROOT=$1/conformance
+CONFORMANCE_TEST_RUNNER=$CONFORMANCE_ROOT/conformance-test-runner
+
+cd $(dirname $0)
+
+if [[ $PROTOBUF_ROOT == "" ]]; then
+  echo "usage: test.sh <protobuf-root>" >/dev/stderr
+  exit 1
+fi
+
+if [[ ! -x $CONFORMANCE_TEST_RUNNER ]]; then
+  echo "SKIP: conformance test runner not installed" >/dev/stderr
+  exit 0
+fi
+
+a=$CONFORMANCE_ROOT/conformance.proto
+b=internal/conformance_proto/conformance.proto
+if [[ $(diff $a $b) != "" ]]; then
+  cp $a $b
+  echo "WARNING: conformance.proto is out of date" >/dev/stderr
+fi
+
+$CONFORMANCE_TEST_RUNNER --failure_list failure_list_go.txt ./conformance.sh
diff --git a/descriptor/descriptor_test.go b/descriptor/descriptor_test.go
index 27b0729..bf5174d 100644
--- a/descriptor/descriptor_test.go
+++ b/descriptor/descriptor_test.go
@@ -5,7 +5,7 @@
 	"testing"
 
 	"github.com/golang/protobuf/descriptor"
-	tpb "github.com/golang/protobuf/proto/testdata"
+	tpb "github.com/golang/protobuf/proto/test_proto"
 	protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor"
 )
 
@@ -20,7 +20,7 @@
 	}
 }
 
-func Example_Options() {
+func Example_options() {
 	var msg *tpb.MyMessageSet
 	_, md := descriptor.ForMessage(msg)
 	if md.GetOptions().GetMessageSetWireFormat() {
diff --git a/jsonpb/jsonpb.go b/jsonpb/jsonpb.go
index 110ae13..ff368f3 100644
--- a/jsonpb/jsonpb.go
+++ b/jsonpb/jsonpb.go
@@ -56,6 +56,8 @@
 	stpb "github.com/golang/protobuf/ptypes/struct"
 )
 
+const secondInNanos = int64(time.Second / time.Nanosecond)
+
 // Marshaler is a configurable object for converting between
 // protocol buffer objects and a JSON representation for them.
 type Marshaler struct {
@@ -118,6 +120,14 @@
 
 // Marshal marshals a protocol buffer into JSON.
 func (m *Marshaler) Marshal(out io.Writer, pb proto.Message) error {
+	v := reflect.ValueOf(pb)
+	if pb == nil || (v.Kind() == reflect.Ptr && v.IsNil()) {
+		return errors.New("Marshal called with nil")
+	}
+	// Check for unset required fields first.
+	if err := checkRequiredFields(pb); err != nil {
+		return err
+	}
 	writer := &errWriter{writer: out}
 	return m.marshalObject(writer, pb, "", "")
 }
@@ -190,13 +200,22 @@
 			// Any is a bit more involved.
 			return m.marshalAny(out, v, indent)
 		case "Duration":
-			// "Generated output always contains 3, 6, or 9 fractional digits,
+			// "Generated output always contains 0, 3, 6, or 9 fractional digits,
 			//  depending on required precision."
 			s, ns := s.Field(0).Int(), s.Field(1).Int()
-			d := time.Duration(s)*time.Second + time.Duration(ns)*time.Nanosecond
-			x := fmt.Sprintf("%.9f", d.Seconds())
+			if ns <= -secondInNanos || ns >= secondInNanos {
+				return fmt.Errorf("ns out of range (%v, %v)", -secondInNanos, secondInNanos)
+			}
+			if (s > 0 && ns < 0) || (s < 0 && ns > 0) {
+				return errors.New("signs of seconds and nanos do not match")
+			}
+			if s < 0 {
+				ns = -ns
+			}
+			x := fmt.Sprintf("%d.%09d", s, ns)
 			x = strings.TrimSuffix(x, "000")
 			x = strings.TrimSuffix(x, "000")
+			x = strings.TrimSuffix(x, ".000")
 			out.write(`"`)
 			out.write(x)
 			out.write(`s"`)
@@ -207,13 +226,17 @@
 			return m.marshalValue(out, &proto.Properties{}, s.Field(0), indent)
 		case "Timestamp":
 			// "RFC 3339, where generated output will always be Z-normalized
-			//  and uses 3, 6 or 9 fractional digits."
+			//  and uses 0, 3, 6 or 9 fractional digits."
 			s, ns := s.Field(0).Int(), s.Field(1).Int()
+			if ns < 0 || ns >= secondInNanos {
+				return fmt.Errorf("ns out of range [0, %v)", secondInNanos)
+			}
 			t := time.Unix(s, ns).UTC()
 			// time.RFC3339Nano isn't exactly right (we need to get 3/6/9 fractional digits).
 			x := t.Format("2006-01-02T15:04:05.000000000")
 			x = strings.TrimSuffix(x, "000")
 			x = strings.TrimSuffix(x, "000")
+			x = strings.TrimSuffix(x, ".000")
 			out.write(`"`)
 			out.write(x)
 			out.write(`Z"`)
@@ -632,7 +655,10 @@
 	if err := dec.Decode(&inputValue); err != nil {
 		return err
 	}
-	return u.unmarshalValue(reflect.ValueOf(pb).Elem(), inputValue, nil)
+	if err := u.unmarshalValue(reflect.ValueOf(pb).Elem(), inputValue, nil); err != nil {
+		return err
+	}
+	return checkRequiredFields(pb)
 }
 
 // Unmarshal unmarshals a JSON object stream into a protocol
@@ -803,7 +829,7 @@
 				return fmt.Errorf("bad ListValue: %v", err)
 			}
 
-			target.Field(0).Set(reflect.ValueOf(make([]*stpb.Value, len(s), len(s))))
+			target.Field(0).Set(reflect.ValueOf(make([]*stpb.Value, len(s))))
 			for i, sv := range s {
 				if err := u.unmarshalValue(target.Field(0).Index(i), sv, prop); err != nil {
 					return err
@@ -973,13 +999,6 @@
 		}
 		if mp != nil {
 			target.Set(reflect.MakeMap(targetType))
-			var keyprop, valprop *proto.Properties
-			if prop != nil {
-				// These could still be nil if the protobuf metadata is broken somehow.
-				// TODO: This won't work because the fields are unexported.
-				// We should probably just reparse them.
-				//keyprop, valprop = prop.mkeyprop, prop.mvalprop
-			}
 			for ks, raw := range mp {
 				// Unmarshal map key. The core json library already decoded the key into a
 				// string, so we handle that specially. Other types were quoted post-serialization.
@@ -988,14 +1007,16 @@
 					k = reflect.ValueOf(ks)
 				} else {
 					k = reflect.New(targetType.Key()).Elem()
-					if err := u.unmarshalValue(k, json.RawMessage(ks), keyprop); err != nil {
+					// TODO: pass the correct Properties if needed.
+					if err := u.unmarshalValue(k, json.RawMessage(ks), nil); err != nil {
 						return err
 					}
 				}
 
 				// Unmarshal map value.
 				v := reflect.New(targetType.Elem()).Elem()
-				if err := u.unmarshalValue(v, raw, valprop); err != nil {
+				// TODO: pass the correct Properties if needed.
+				if err := u.unmarshalValue(v, raw, nil); err != nil {
 					return err
 				}
 				target.SetMapIndex(k, v)
@@ -1081,3 +1102,140 @@
 	}
 	return fmt.Sprint(s[i].Interface()) < fmt.Sprint(s[j].Interface())
 }
+
+// checkRequiredFields returns an error if any required field in the given proto message is not set.
+// This function is used by both Marshal and Unmarshal.  While required fields only exist in a
+// proto2 message, a proto3 message can contain proto2 message(s).
+func checkRequiredFields(pb proto.Message) error {
+	// Most well-known type messages do not contain required fields.  The "Any" type may contain
+	// a message that has required fields.
+	//
+	// When an Any message is being marshaled, the code will invoked proto.Unmarshal on Any.Value
+	// field in order to transform that into JSON, and that should have returned an error if a
+	// required field is not set in the embedded message.
+	//
+	// When an Any message is being unmarshaled, the code will have invoked proto.Marshal on the
+	// embedded message to store the serialized message in Any.Value field, and that should have
+	// returned an error if a required field is not set.
+	if _, ok := pb.(wkt); ok {
+		return nil
+	}
+
+	v := reflect.ValueOf(pb)
+	// Skip message if it is not a struct pointer.
+	if v.Kind() != reflect.Ptr {
+		return nil
+	}
+	v = v.Elem()
+	if v.Kind() != reflect.Struct {
+		return nil
+	}
+
+	for i := 0; i < v.NumField(); i++ {
+		field := v.Field(i)
+		sfield := v.Type().Field(i)
+
+		if sfield.PkgPath != "" {
+			// blank PkgPath means the field is exported; skip if not exported
+			continue
+		}
+
+		if strings.HasPrefix(sfield.Name, "XXX_") {
+			continue
+		}
+
+		// Oneof field is an interface implemented by wrapper structs containing the actual oneof
+		// field, i.e. an interface containing &T{real_value}.
+		if sfield.Tag.Get("protobuf_oneof") != "" {
+			if field.Kind() != reflect.Interface {
+				continue
+			}
+			v := field.Elem()
+			if v.Kind() != reflect.Ptr || v.IsNil() {
+				continue
+			}
+			v = v.Elem()
+			if v.Kind() != reflect.Struct || v.NumField() < 1 {
+				continue
+			}
+			field = v.Field(0)
+			sfield = v.Type().Field(0)
+		}
+
+		protoTag := sfield.Tag.Get("protobuf")
+		if protoTag == "" {
+			continue
+		}
+		var prop proto.Properties
+		prop.Init(sfield.Type, sfield.Name, protoTag, &sfield)
+
+		switch field.Kind() {
+		case reflect.Map:
+			if field.IsNil() {
+				continue
+			}
+			// Check each map value.
+			keys := field.MapKeys()
+			for _, k := range keys {
+				v := field.MapIndex(k)
+				if err := checkRequiredFieldsInValue(v); err != nil {
+					return err
+				}
+			}
+		case reflect.Slice:
+			// Handle non-repeated type, e.g. bytes.
+			if !prop.Repeated {
+				if prop.Required && field.IsNil() {
+					return fmt.Errorf("required field %q is not set", prop.Name)
+				}
+				continue
+			}
+
+			// Handle repeated type.
+			if field.IsNil() {
+				continue
+			}
+			// Check each slice item.
+			for i := 0; i < field.Len(); i++ {
+				v := field.Index(i)
+				if err := checkRequiredFieldsInValue(v); err != nil {
+					return err
+				}
+			}
+		case reflect.Ptr:
+			if field.IsNil() {
+				if prop.Required {
+					return fmt.Errorf("required field %q is not set", prop.Name)
+				}
+				continue
+			}
+			if err := checkRequiredFieldsInValue(field); err != nil {
+				return err
+			}
+		}
+	}
+
+	// Handle proto2 extensions.
+	for _, ext := range proto.RegisteredExtensions(pb) {
+		if !proto.HasExtension(pb, ext) {
+			continue
+		}
+		ep, err := proto.GetExtension(pb, ext)
+		if err != nil {
+			return err
+		}
+		err = checkRequiredFieldsInValue(reflect.ValueOf(ep))
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func checkRequiredFieldsInValue(v reflect.Value) error {
+	if pm, ok := v.Interface().(proto.Message); ok {
+		return checkRequiredFields(pm)
+	}
+	return nil
+}
diff --git a/jsonpb/jsonpb_test.go b/jsonpb/jsonpb_test.go
index 2428d05..c9934d9 100644
--- a/jsonpb/jsonpb_test.go
+++ b/jsonpb/jsonpb_test.go
@@ -406,7 +406,10 @@
 	{"Any with message and indent", marshalerAllOptions, anySimple, anySimplePrettyJSON},
 	{"Any with WKT", marshaler, anyWellKnown, anyWellKnownJSON},
 	{"Any with WKT and indent", marshalerAllOptions, anyWellKnown, anyWellKnownPrettyJSON},
-	{"Duration", marshaler, &pb.KnownTypes{Dur: &durpb.Duration{Seconds: 3}}, `{"dur":"3.000s"}`},
+	{"Duration", marshaler, &pb.KnownTypes{Dur: &durpb.Duration{Seconds: 3}}, `{"dur":"3s"}`},
+	{"Duration", marshaler, &pb.KnownTypes{Dur: &durpb.Duration{Seconds: 3, Nanos: 1e6}}, `{"dur":"3.001s"}`},
+	{"Duration beyond float64 precision", marshaler, &pb.KnownTypes{Dur: &durpb.Duration{Seconds: 100000000, Nanos: 1}}, `{"dur":"100000000.000000001s"}`},
+	{"negative Duration", marshaler, &pb.KnownTypes{Dur: &durpb.Duration{Seconds: -123, Nanos: -456}}, `{"dur":"-123.000000456s"}`},
 	{"Struct", marshaler, &pb.KnownTypes{St: &stpb.Struct{
 		Fields: map[string]*stpb.Value{
 			"one": {Kind: &stpb.Value_StringValue{"loneliest number"}},
@@ -421,6 +424,7 @@
 		{Kind: &stpb.Value_BoolValue{true}},
 	}}}, `{"lv":["x",null,3,true]}`},
 	{"Timestamp", marshaler, &pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: 14e8, Nanos: 21e6}}, `{"ts":"2014-05-13T16:53:20.021Z"}`},
+	{"Timestamp", marshaler, &pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: 14e8, Nanos: 0}}, `{"ts":"2014-05-13T16:53:20Z"}`},
 	{"number Value", marshaler, &pb.KnownTypes{Val: &stpb.Value{Kind: &stpb.Value_NumberValue{1}}}, `{"val":1}`},
 	{"null Value", marshaler, &pb.KnownTypes{Val: &stpb.Value{Kind: &stpb.Value_NullValue{stpb.NullValue_NULL_VALUE}}}, `{"val":null}`},
 	{"string number value", marshaler, &pb.KnownTypes{Val: &stpb.Value{Kind: &stpb.Value_StringValue{"9223372036854775807"}}}, `{"val":"9223372036854775807"}`},
@@ -449,6 +453,9 @@
 	{"BoolValue", marshaler, &pb.KnownTypes{Bool: &wpb.BoolValue{Value: true}}, `{"bool":true}`},
 	{"StringValue", marshaler, &pb.KnownTypes{Str: &wpb.StringValue{Value: "plush"}}, `{"str":"plush"}`},
 	{"BytesValue", marshaler, &pb.KnownTypes{Bytes: &wpb.BytesValue{Value: []byte("wow")}}, `{"bytes":"d293"}`},
+
+	{"required", marshaler, &pb.MsgWithRequired{Str: proto.String("hello")}, `{"str":"hello"}`},
+	{"required bytes", marshaler, &pb.MsgWithRequiredBytes{Byts: []byte{}}, `{"byts":""}`},
 }
 
 func TestMarshaling(t *testing.T) {
@@ -462,6 +469,40 @@
 	}
 }
 
+func TestMarshalingNil(t *testing.T) {
+	var msg *pb.Simple
+	m := &Marshaler{}
+	if _, err := m.MarshalToString(msg); err == nil {
+		t.Errorf("mashaling nil returned no error")
+	}
+}
+
+func TestMarshalIllegalTime(t *testing.T) {
+	tests := []struct {
+		pb   proto.Message
+		fail bool
+	}{
+		{&pb.KnownTypes{Dur: &durpb.Duration{Seconds: 1, Nanos: 0}}, false},
+		{&pb.KnownTypes{Dur: &durpb.Duration{Seconds: -1, Nanos: 0}}, false},
+		{&pb.KnownTypes{Dur: &durpb.Duration{Seconds: 1, Nanos: -1}}, true},
+		{&pb.KnownTypes{Dur: &durpb.Duration{Seconds: -1, Nanos: 1}}, true},
+		{&pb.KnownTypes{Dur: &durpb.Duration{Seconds: 1, Nanos: 1000000000}}, true},
+		{&pb.KnownTypes{Dur: &durpb.Duration{Seconds: -1, Nanos: -1000000000}}, true},
+		{&pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: 1, Nanos: 1}}, false},
+		{&pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: 1, Nanos: -1}}, true},
+		{&pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: 1, Nanos: 1000000000}}, true},
+	}
+	for _, tt := range tests {
+		_, err := marshaler.MarshalToString(tt.pb)
+		if err == nil && tt.fail {
+			t.Errorf("marshaler.MarshalToString(%v) = _, <nil>; want _, <non-nil>", tt.pb)
+		}
+		if err != nil && !tt.fail {
+			t.Errorf("marshaler.MarshalToString(%v) = _, %v; want _, <nil>", tt.pb, err)
+		}
+	}
+}
+
 func TestMarshalJSONPBMarshaler(t *testing.T) {
 	rawJson := `{ "foo": "bar", "baz": [0, 1, 2, 3] }`
 	msg := dynamicMessage{rawJson: rawJson}
@@ -492,6 +533,104 @@
 	}
 }
 
+func TestMarshalWithCustomValidation(t *testing.T) {
+	msg := dynamicMessage{rawJson: `{ "foo": "bar", "baz": [0, 1, 2, 3] }`, dummy: &dynamicMessage{}}
+
+	js, err := new(Marshaler).MarshalToString(&msg)
+	if err != nil {
+		t.Errorf("an unexpected error occurred when marshalling to json: %v", err)
+	}
+	err = Unmarshal(strings.NewReader(js), &msg)
+	if err != nil {
+		t.Errorf("an unexpected error occurred when unmarshalling from json: %v", err)
+	}
+}
+
+// Test marshaling message containing unset required fields should produce error.
+func TestMarshalUnsetRequiredFields(t *testing.T) {
+	msgExt := &pb.Real{}
+	proto.SetExtension(msgExt, pb.E_Extm, &pb.MsgWithRequired{})
+
+	tests := []struct {
+		desc      string
+		marshaler *Marshaler
+		pb        proto.Message
+	}{
+		{
+			desc:      "direct required field",
+			marshaler: &Marshaler{},
+			pb:        &pb.MsgWithRequired{},
+		},
+		{
+			desc:      "direct required field + emit defaults",
+			marshaler: &Marshaler{EmitDefaults: true},
+			pb:        &pb.MsgWithRequired{},
+		},
+		{
+			desc:      "indirect required field",
+			marshaler: &Marshaler{},
+			pb:        &pb.MsgWithIndirectRequired{Subm: &pb.MsgWithRequired{}},
+		},
+		{
+			desc:      "indirect required field + emit defaults",
+			marshaler: &Marshaler{EmitDefaults: true},
+			pb:        &pb.MsgWithIndirectRequired{Subm: &pb.MsgWithRequired{}},
+		},
+		{
+			desc:      "direct required wkt field",
+			marshaler: &Marshaler{},
+			pb:        &pb.MsgWithRequiredWKT{},
+		},
+		{
+			desc:      "direct required wkt field + emit defaults",
+			marshaler: &Marshaler{EmitDefaults: true},
+			pb:        &pb.MsgWithRequiredWKT{},
+		},
+		{
+			desc:      "direct required bytes field",
+			marshaler: &Marshaler{},
+			pb:        &pb.MsgWithRequiredBytes{},
+		},
+		{
+			desc:      "required in map value",
+			marshaler: &Marshaler{},
+			pb: &pb.MsgWithIndirectRequired{
+				MapField: map[string]*pb.MsgWithRequired{
+					"key": {},
+				},
+			},
+		},
+		{
+			desc:      "required in repeated item",
+			marshaler: &Marshaler{},
+			pb: &pb.MsgWithIndirectRequired{
+				SliceField: []*pb.MsgWithRequired{
+					{Str: proto.String("hello")},
+					{},
+				},
+			},
+		},
+		{
+			desc:      "required inside oneof",
+			marshaler: &Marshaler{},
+			pb: &pb.MsgWithOneof{
+				Union: &pb.MsgWithOneof_MsgWithRequired{&pb.MsgWithRequired{}},
+			},
+		},
+		{
+			desc:      "required inside extension",
+			marshaler: &Marshaler{},
+			pb:        msgExt,
+		},
+	}
+
+	for _, tc := range tests {
+		if _, err := tc.marshaler.MarshalToString(tc.pb); err == nil {
+			t.Errorf("%s: expecting error in marshaling with unset required fields %+v", tc.desc, tc.pb)
+		}
+	}
+}
+
 var unmarshalingTests = []struct {
 	desc        string
 	unmarshaler Unmarshaler
@@ -553,8 +692,10 @@
 	{"camelName input", Unmarshaler{}, `{"oBool":true}`, &pb.Simple{OBool: proto.Bool(true)}},
 
 	{"Duration", Unmarshaler{}, `{"dur":"3.000s"}`, &pb.KnownTypes{Dur: &durpb.Duration{Seconds: 3}}},
+	{"Duration", Unmarshaler{}, `{"dur":"4s"}`, &pb.KnownTypes{Dur: &durpb.Duration{Seconds: 4}}},
 	{"null Duration", Unmarshaler{}, `{"dur":null}`, &pb.KnownTypes{Dur: nil}},
 	{"Timestamp", Unmarshaler{}, `{"ts":"2014-05-13T16:53:20.021Z"}`, &pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: 14e8, Nanos: 21e6}}},
+	{"Timestamp", Unmarshaler{}, `{"ts":"2014-05-13T16:53:20Z"}`, &pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: 14e8, Nanos: 0}}},
 	{"PreEpochTimestamp", Unmarshaler{}, `{"ts":"1969-12-31T23:59:58.999999995Z"}`, &pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: -2, Nanos: 999999995}}},
 	{"ZeroTimeTimestamp", Unmarshaler{}, `{"ts":"0001-01-01T00:00:00Z"}`, &pb.KnownTypes{Ts: &tspb.Timestamp{Seconds: -62135596800, Nanos: 0}}},
 	{"null Timestamp", Unmarshaler{}, `{"ts":null}`, &pb.KnownTypes{Ts: nil}},
@@ -623,6 +764,9 @@
 	{"null BoolValue", Unmarshaler{}, `{"bool":null}`, &pb.KnownTypes{Bool: nil}},
 	{"null StringValue", Unmarshaler{}, `{"str":null}`, &pb.KnownTypes{Str: nil}},
 	{"null BytesValue", Unmarshaler{}, `{"bytes":null}`, &pb.KnownTypes{Bytes: nil}},
+
+	{"required", Unmarshaler{}, `{"str":"hello"}`, &pb.MsgWithRequired{Str: proto.String("hello")}},
+	{"required bytes", Unmarshaler{}, `{"byts": []}`, &pb.MsgWithRequiredBytes{Byts: []byte{}}},
 }
 
 func TestUnmarshaling(t *testing.T) {
@@ -821,7 +965,7 @@
 	}
 
 	if !proto.Equal(&got, &want) {
-		t.Errorf("message contents not set correctly after unmarshalling JSON: got %s, wanted %s", got, want)
+		t.Errorf("message contents not set correctly after unmarshalling JSON: got %v, wanted %v", got, want)
 	}
 }
 
@@ -873,6 +1017,10 @@
 // It provides implementations of JSONPBMarshaler and JSONPBUnmarshaler for JSON support.
 type dynamicMessage struct {
 	rawJson string `protobuf:"bytes,1,opt,name=rawJson"`
+
+	// an unexported nested message is present just to ensure that it
+	// won't result in a panic (see issue #509)
+	dummy *dynamicMessage `protobuf:"bytes,2,opt,name=dummy"`
 }
 
 func (m *dynamicMessage) Reset() {
@@ -894,3 +1042,109 @@
 	m.rawJson = string(js)
 	return nil
 }
+
+// Test unmarshaling message containing unset required fields should produce error.
+func TestUnmarshalUnsetRequiredFields(t *testing.T) {
+	tests := []struct {
+		desc string
+		pb   proto.Message
+		json string
+	}{
+		{
+			desc: "direct required field missing",
+			pb:   &pb.MsgWithRequired{},
+			json: `{}`,
+		},
+		{
+			desc: "direct required field set to null",
+			pb:   &pb.MsgWithRequired{},
+			json: `{"str": null}`,
+		},
+		{
+			desc: "indirect required field missing",
+			pb:   &pb.MsgWithIndirectRequired{},
+			json: `{"subm": {}}`,
+		},
+		{
+			desc: "indirect required field set to null",
+			pb:   &pb.MsgWithIndirectRequired{},
+			json: `{"subm": {"str": null}}`,
+		},
+		{
+			desc: "direct required bytes field missing",
+			pb:   &pb.MsgWithRequiredBytes{},
+			json: `{}`,
+		},
+		{
+			desc: "direct required bytes field set to null",
+			pb:   &pb.MsgWithRequiredBytes{},
+			json: `{"byts": null}`,
+		},
+		{
+			desc: "direct required wkt field missing",
+			pb:   &pb.MsgWithRequiredWKT{},
+			json: `{}`,
+		},
+		{
+			desc: "direct required wkt field set to null",
+			pb:   &pb.MsgWithRequiredWKT{},
+			json: `{"str": null}`,
+		},
+		{
+			desc: "any containing message with required field set to null",
+			pb:   &pb.KnownTypes{},
+			json: `{"an": {"@type": "example.com/jsonpb.MsgWithRequired", "str": null}}`,
+		},
+		{
+			desc: "any containing message with missing required field",
+			pb:   &pb.KnownTypes{},
+			json: `{"an": {"@type": "example.com/jsonpb.MsgWithRequired"}}`,
+		},
+		{
+			desc: "missing required in map value",
+			pb:   &pb.MsgWithIndirectRequired{},
+			json: `{"map_field": {"a": {}, "b": {"str": "hi"}}}`,
+		},
+		{
+			desc: "required in map value set to null",
+			pb:   &pb.MsgWithIndirectRequired{},
+			json: `{"map_field": {"a": {"str": "hello"}, "b": {"str": null}}}`,
+		},
+		{
+			desc: "missing required in slice item",
+			pb:   &pb.MsgWithIndirectRequired{},
+			json: `{"slice_field": [{}, {"str": "hi"}]}`,
+		},
+		{
+			desc: "required in slice item set to null",
+			pb:   &pb.MsgWithIndirectRequired{},
+			json: `{"slice_field": [{"str": "hello"}, {"str": null}]}`,
+		},
+		{
+			desc: "required inside oneof missing",
+			pb:   &pb.MsgWithOneof{},
+			json: `{"msgWithRequired": {}}`,
+		},
+		{
+			desc: "required inside oneof set to null",
+			pb:   &pb.MsgWithOneof{},
+			json: `{"msgWithRequired": {"str": null}}`,
+		},
+		{
+			desc: "required field in extension missing",
+			pb:   &pb.Real{},
+			json: `{"[jsonpb.extm]":{}}`,
+		},
+		{
+			desc: "required field in extension set to null",
+			pb:   &pb.Real{},
+			json: `{"[jsonpb.extm]":{"str": null}}`,
+		},
+	}
+
+	for _, tc := range tests {
+		if err := UnmarshalString(tc.json, tc.pb); err == nil {
+			t.Errorf("%s: expecting error in unmarshaling with unset required fields %s", tc.desc, tc.json)
+		}
+	}
+}
diff --git a/jsonpb/jsonpb_test_proto/Makefile b/jsonpb/jsonpb_test_proto/Makefile
deleted file mode 100644
index eeda8ae..0000000
--- a/jsonpb/jsonpb_test_proto/Makefile
+++ /dev/null
@@ -1,33 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2015 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-regenerate:
-	protoc --go_out=Mgoogle/protobuf/any.proto=github.com/golang/protobuf/ptypes/any,Mgoogle/protobuf/duration.proto=github.com/golang/protobuf/ptypes/duration,Mgoogle/protobuf/struct.proto=github.com/golang/protobuf/ptypes/struct,Mgoogle/protobuf/timestamp.proto=github.com/golang/protobuf/ptypes/timestamp,Mgoogle/protobuf/wrappers.proto=github.com/golang/protobuf/ptypes/wrappers:. *.proto
diff --git a/jsonpb/jsonpb_test_proto/more_test_objects.pb.go b/jsonpb/jsonpb_test_proto/more_test_objects.pb.go
index ebb180e..1bcce02 100644
--- a/jsonpb/jsonpb_test_proto/more_test_objects.pb.go
+++ b/jsonpb/jsonpb_test_proto/more_test_objects.pb.go
@@ -1,29 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: more_test_objects.proto
 
-/*
-Package jsonpb is a generated protocol buffer package.
-
-It is generated from these files:
-	more_test_objects.proto
-	test_objects.proto
-
-It has these top-level messages:
-	Simple3
-	SimpleSlice3
-	SimpleMap3
-	SimpleNull3
-	Mappy
-	Simple
-	NonFinites
-	Repeats
-	Widget
-	Maps
-	MsgWithOneof
-	Real
-	Complex
-	KnownTypes
-*/
 package jsonpb
 
 import proto "github.com/golang/protobuf/proto"
@@ -63,16 +40,40 @@
 func (x Numeral) String() string {
 	return proto.EnumName(Numeral_name, int32(x))
 }
-func (Numeral) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-
-type Simple3 struct {
-	Dub float64 `protobuf:"fixed64,1,opt,name=dub" json:"dub,omitempty"`
+func (Numeral) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_more_test_objects_bef0d79b901f4c4a, []int{0}
 }
 
-func (m *Simple3) Reset()                    { *m = Simple3{} }
-func (m *Simple3) String() string            { return proto.CompactTextString(m) }
-func (*Simple3) ProtoMessage()               {}
-func (*Simple3) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+type Simple3 struct {
+	Dub                  float64  `protobuf:"fixed64,1,opt,name=dub" json:"dub,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Simple3) Reset()         { *m = Simple3{} }
+func (m *Simple3) String() string { return proto.CompactTextString(m) }
+func (*Simple3) ProtoMessage()    {}
+func (*Simple3) Descriptor() ([]byte, []int) {
+	return fileDescriptor_more_test_objects_bef0d79b901f4c4a, []int{0}
+}
+func (m *Simple3) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Simple3.Unmarshal(m, b)
+}
+func (m *Simple3) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Simple3.Marshal(b, m, deterministic)
+}
+func (dst *Simple3) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Simple3.Merge(dst, src)
+}
+func (m *Simple3) XXX_Size() int {
+	return xxx_messageInfo_Simple3.Size(m)
+}
+func (m *Simple3) XXX_DiscardUnknown() {
+	xxx_messageInfo_Simple3.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Simple3 proto.InternalMessageInfo
 
 func (m *Simple3) GetDub() float64 {
 	if m != nil {
@@ -82,13 +83,35 @@
 }
 
 type SimpleSlice3 struct {
-	Slices []string `protobuf:"bytes,1,rep,name=slices" json:"slices,omitempty"`
+	Slices               []string `protobuf:"bytes,1,rep,name=slices" json:"slices,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *SimpleSlice3) Reset()                    { *m = SimpleSlice3{} }
-func (m *SimpleSlice3) String() string            { return proto.CompactTextString(m) }
-func (*SimpleSlice3) ProtoMessage()               {}
-func (*SimpleSlice3) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+func (m *SimpleSlice3) Reset()         { *m = SimpleSlice3{} }
+func (m *SimpleSlice3) String() string { return proto.CompactTextString(m) }
+func (*SimpleSlice3) ProtoMessage()    {}
+func (*SimpleSlice3) Descriptor() ([]byte, []int) {
+	return fileDescriptor_more_test_objects_bef0d79b901f4c4a, []int{1}
+}
+func (m *SimpleSlice3) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SimpleSlice3.Unmarshal(m, b)
+}
+func (m *SimpleSlice3) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SimpleSlice3.Marshal(b, m, deterministic)
+}
+func (dst *SimpleSlice3) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SimpleSlice3.Merge(dst, src)
+}
+func (m *SimpleSlice3) XXX_Size() int {
+	return xxx_messageInfo_SimpleSlice3.Size(m)
+}
+func (m *SimpleSlice3) XXX_DiscardUnknown() {
+	xxx_messageInfo_SimpleSlice3.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SimpleSlice3 proto.InternalMessageInfo
 
 func (m *SimpleSlice3) GetSlices() []string {
 	if m != nil {
@@ -98,13 +121,35 @@
 }
 
 type SimpleMap3 struct {
-	Stringy map[string]string `protobuf:"bytes,1,rep,name=stringy" json:"stringy,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Stringy              map[string]string `protobuf:"bytes,1,rep,name=stringy" json:"stringy,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
 }
 
-func (m *SimpleMap3) Reset()                    { *m = SimpleMap3{} }
-func (m *SimpleMap3) String() string            { return proto.CompactTextString(m) }
-func (*SimpleMap3) ProtoMessage()               {}
-func (*SimpleMap3) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+func (m *SimpleMap3) Reset()         { *m = SimpleMap3{} }
+func (m *SimpleMap3) String() string { return proto.CompactTextString(m) }
+func (*SimpleMap3) ProtoMessage()    {}
+func (*SimpleMap3) Descriptor() ([]byte, []int) {
+	return fileDescriptor_more_test_objects_bef0d79b901f4c4a, []int{2}
+}
+func (m *SimpleMap3) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SimpleMap3.Unmarshal(m, b)
+}
+func (m *SimpleMap3) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SimpleMap3.Marshal(b, m, deterministic)
+}
+func (dst *SimpleMap3) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SimpleMap3.Merge(dst, src)
+}
+func (m *SimpleMap3) XXX_Size() int {
+	return xxx_messageInfo_SimpleMap3.Size(m)
+}
+func (m *SimpleMap3) XXX_DiscardUnknown() {
+	xxx_messageInfo_SimpleMap3.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SimpleMap3 proto.InternalMessageInfo
 
 func (m *SimpleMap3) GetStringy() map[string]string {
 	if m != nil {
@@ -114,13 +159,35 @@
 }
 
 type SimpleNull3 struct {
-	Simple *Simple3 `protobuf:"bytes,1,opt,name=simple" json:"simple,omitempty"`
+	Simple               *Simple3 `protobuf:"bytes,1,opt,name=simple" json:"simple,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *SimpleNull3) Reset()                    { *m = SimpleNull3{} }
-func (m *SimpleNull3) String() string            { return proto.CompactTextString(m) }
-func (*SimpleNull3) ProtoMessage()               {}
-func (*SimpleNull3) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+func (m *SimpleNull3) Reset()         { *m = SimpleNull3{} }
+func (m *SimpleNull3) String() string { return proto.CompactTextString(m) }
+func (*SimpleNull3) ProtoMessage()    {}
+func (*SimpleNull3) Descriptor() ([]byte, []int) {
+	return fileDescriptor_more_test_objects_bef0d79b901f4c4a, []int{3}
+}
+func (m *SimpleNull3) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SimpleNull3.Unmarshal(m, b)
+}
+func (m *SimpleNull3) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SimpleNull3.Marshal(b, m, deterministic)
+}
+func (dst *SimpleNull3) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SimpleNull3.Merge(dst, src)
+}
+func (m *SimpleNull3) XXX_Size() int {
+	return xxx_messageInfo_SimpleNull3.Size(m)
+}
+func (m *SimpleNull3) XXX_DiscardUnknown() {
+	xxx_messageInfo_SimpleNull3.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SimpleNull3 proto.InternalMessageInfo
 
 func (m *SimpleNull3) GetSimple() *Simple3 {
 	if m != nil {
@@ -130,22 +197,44 @@
 }
 
 type Mappy struct {
-	Nummy    map[int64]int32    `protobuf:"bytes,1,rep,name=nummy" json:"nummy,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	Strry    map[string]string  `protobuf:"bytes,2,rep,name=strry" json:"strry,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	Objjy    map[int32]*Simple3 `protobuf:"bytes,3,rep,name=objjy" json:"objjy,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	Buggy    map[int64]string   `protobuf:"bytes,4,rep,name=buggy" json:"buggy,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	Booly    map[bool]bool      `protobuf:"bytes,5,rep,name=booly" json:"booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	Enumy    map[string]Numeral `protobuf:"bytes,6,rep,name=enumy" json:"enumy,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"varint,2,opt,name=value,enum=jsonpb.Numeral"`
-	S32Booly map[int32]bool     `protobuf:"bytes,7,rep,name=s32booly" json:"s32booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	S64Booly map[int64]bool     `protobuf:"bytes,8,rep,name=s64booly" json:"s64booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	U32Booly map[uint32]bool    `protobuf:"bytes,9,rep,name=u32booly" json:"u32booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
-	U64Booly map[uint64]bool    `protobuf:"bytes,10,rep,name=u64booly" json:"u64booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	Nummy                map[int64]int32    `protobuf:"bytes,1,rep,name=nummy" json:"nummy,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	Strry                map[string]string  `protobuf:"bytes,2,rep,name=strry" json:"strry,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Objjy                map[int32]*Simple3 `protobuf:"bytes,3,rep,name=objjy" json:"objjy,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Buggy                map[int64]string   `protobuf:"bytes,4,rep,name=buggy" json:"buggy,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Booly                map[bool]bool      `protobuf:"bytes,5,rep,name=booly" json:"booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	Enumy                map[string]Numeral `protobuf:"bytes,6,rep,name=enumy" json:"enumy,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"varint,2,opt,name=value,enum=jsonpb.Numeral"`
+	S32Booly             map[int32]bool     `protobuf:"bytes,7,rep,name=s32booly" json:"s32booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	S64Booly             map[int64]bool     `protobuf:"bytes,8,rep,name=s64booly" json:"s64booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	U32Booly             map[uint32]bool    `protobuf:"bytes,9,rep,name=u32booly" json:"u32booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	U64Booly             map[uint64]bool    `protobuf:"bytes,10,rep,name=u64booly" json:"u64booly,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}           `json:"-"`
+	XXX_unrecognized     []byte             `json:"-"`
+	XXX_sizecache        int32              `json:"-"`
 }
 
-func (m *Mappy) Reset()                    { *m = Mappy{} }
-func (m *Mappy) String() string            { return proto.CompactTextString(m) }
-func (*Mappy) ProtoMessage()               {}
-func (*Mappy) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+func (m *Mappy) Reset()         { *m = Mappy{} }
+func (m *Mappy) String() string { return proto.CompactTextString(m) }
+func (*Mappy) ProtoMessage()    {}
+func (*Mappy) Descriptor() ([]byte, []int) {
+	return fileDescriptor_more_test_objects_bef0d79b901f4c4a, []int{4}
+}
+func (m *Mappy) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Mappy.Unmarshal(m, b)
+}
+func (m *Mappy) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Mappy.Marshal(b, m, deterministic)
+}
+func (dst *Mappy) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Mappy.Merge(dst, src)
+}
+func (m *Mappy) XXX_Size() int {
+	return xxx_messageInfo_Mappy.Size(m)
+}
+func (m *Mappy) XXX_DiscardUnknown() {
+	xxx_messageInfo_Mappy.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Mappy proto.InternalMessageInfo
 
 func (m *Mappy) GetNummy() map[int64]int32 {
 	if m != nil {
@@ -221,14 +310,27 @@
 	proto.RegisterType((*Simple3)(nil), "jsonpb.Simple3")
 	proto.RegisterType((*SimpleSlice3)(nil), "jsonpb.SimpleSlice3")
 	proto.RegisterType((*SimpleMap3)(nil), "jsonpb.SimpleMap3")
+	proto.RegisterMapType((map[string]string)(nil), "jsonpb.SimpleMap3.StringyEntry")
 	proto.RegisterType((*SimpleNull3)(nil), "jsonpb.SimpleNull3")
 	proto.RegisterType((*Mappy)(nil), "jsonpb.Mappy")
+	proto.RegisterMapType((map[bool]bool)(nil), "jsonpb.Mappy.BoolyEntry")
+	proto.RegisterMapType((map[int64]string)(nil), "jsonpb.Mappy.BuggyEntry")
+	proto.RegisterMapType((map[string]Numeral)(nil), "jsonpb.Mappy.EnumyEntry")
+	proto.RegisterMapType((map[int64]int32)(nil), "jsonpb.Mappy.NummyEntry")
+	proto.RegisterMapType((map[int32]*Simple3)(nil), "jsonpb.Mappy.ObjjyEntry")
+	proto.RegisterMapType((map[int32]bool)(nil), "jsonpb.Mappy.S32boolyEntry")
+	proto.RegisterMapType((map[int64]bool)(nil), "jsonpb.Mappy.S64boolyEntry")
+	proto.RegisterMapType((map[string]string)(nil), "jsonpb.Mappy.StrryEntry")
+	proto.RegisterMapType((map[uint32]bool)(nil), "jsonpb.Mappy.U32boolyEntry")
+	proto.RegisterMapType((map[uint64]bool)(nil), "jsonpb.Mappy.U64boolyEntry")
 	proto.RegisterEnum("jsonpb.Numeral", Numeral_name, Numeral_value)
 }
 
-func init() { proto.RegisterFile("more_test_objects.proto", fileDescriptor0) }
+func init() {
+	proto.RegisterFile("more_test_objects.proto", fileDescriptor_more_test_objects_bef0d79b901f4c4a)
+}
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_more_test_objects_bef0d79b901f4c4a = []byte{
 	// 526 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x94, 0xdd, 0x6b, 0xdb, 0x3c,
 	0x14, 0x87, 0x5f, 0x27, 0xf5, 0xd7, 0x49, 0xfb, 0x2e, 0x88, 0xb1, 0x99, 0xf4, 0x62, 0xc5, 0xb0,
diff --git a/jsonpb/jsonpb_test_proto/test_objects.pb.go b/jsonpb/jsonpb_test_proto/test_objects.pb.go
index d413d74..d9e24db 100644
--- a/jsonpb/jsonpb_test_proto/test_objects.pb.go
+++ b/jsonpb/jsonpb_test_proto/test_objects.pb.go
@@ -6,17 +6,23 @@
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
 import math "math"
-import google_protobuf "github.com/golang/protobuf/ptypes/any"
-import google_protobuf1 "github.com/golang/protobuf/ptypes/duration"
-import google_protobuf2 "github.com/golang/protobuf/ptypes/struct"
-import google_protobuf3 "github.com/golang/protobuf/ptypes/timestamp"
-import google_protobuf4 "github.com/golang/protobuf/ptypes/wrappers"
+import any "github.com/golang/protobuf/ptypes/any"
+import duration "github.com/golang/protobuf/ptypes/duration"
+import _struct "github.com/golang/protobuf/ptypes/struct"
+import timestamp "github.com/golang/protobuf/ptypes/timestamp"
+import wrappers "github.com/golang/protobuf/ptypes/wrappers"
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
 var _ = fmt.Errorf
 var _ = math.Inf
 
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
 type Widget_Color int32
 
 const (
@@ -52,28 +58,51 @@
 	*x = Widget_Color(value)
 	return nil
 }
-func (Widget_Color) EnumDescriptor() ([]byte, []int) { return fileDescriptor1, []int{3, 0} }
+func (Widget_Color) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{3, 0}
+}
 
 // Test message for holding primitive types.
 type Simple struct {
-	OBool            *bool    `protobuf:"varint,1,opt,name=o_bool,json=oBool" json:"o_bool,omitempty"`
-	OInt32           *int32   `protobuf:"varint,2,opt,name=o_int32,json=oInt32" json:"o_int32,omitempty"`
-	OInt64           *int64   `protobuf:"varint,3,opt,name=o_int64,json=oInt64" json:"o_int64,omitempty"`
-	OUint32          *uint32  `protobuf:"varint,4,opt,name=o_uint32,json=oUint32" json:"o_uint32,omitempty"`
-	OUint64          *uint64  `protobuf:"varint,5,opt,name=o_uint64,json=oUint64" json:"o_uint64,omitempty"`
-	OSint32          *int32   `protobuf:"zigzag32,6,opt,name=o_sint32,json=oSint32" json:"o_sint32,omitempty"`
-	OSint64          *int64   `protobuf:"zigzag64,7,opt,name=o_sint64,json=oSint64" json:"o_sint64,omitempty"`
-	OFloat           *float32 `protobuf:"fixed32,8,opt,name=o_float,json=oFloat" json:"o_float,omitempty"`
-	ODouble          *float64 `protobuf:"fixed64,9,opt,name=o_double,json=oDouble" json:"o_double,omitempty"`
-	OString          *string  `protobuf:"bytes,10,opt,name=o_string,json=oString" json:"o_string,omitempty"`
-	OBytes           []byte   `protobuf:"bytes,11,opt,name=o_bytes,json=oBytes" json:"o_bytes,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
+	OBool                *bool    `protobuf:"varint,1,opt,name=o_bool,json=oBool" json:"o_bool,omitempty"`
+	OInt32               *int32   `protobuf:"varint,2,opt,name=o_int32,json=oInt32" json:"o_int32,omitempty"`
+	OInt64               *int64   `protobuf:"varint,3,opt,name=o_int64,json=oInt64" json:"o_int64,omitempty"`
+	OUint32              *uint32  `protobuf:"varint,4,opt,name=o_uint32,json=oUint32" json:"o_uint32,omitempty"`
+	OUint64              *uint64  `protobuf:"varint,5,opt,name=o_uint64,json=oUint64" json:"o_uint64,omitempty"`
+	OSint32              *int32   `protobuf:"zigzag32,6,opt,name=o_sint32,json=oSint32" json:"o_sint32,omitempty"`
+	OSint64              *int64   `protobuf:"zigzag64,7,opt,name=o_sint64,json=oSint64" json:"o_sint64,omitempty"`
+	OFloat               *float32 `protobuf:"fixed32,8,opt,name=o_float,json=oFloat" json:"o_float,omitempty"`
+	ODouble              *float64 `protobuf:"fixed64,9,opt,name=o_double,json=oDouble" json:"o_double,omitempty"`
+	OString              *string  `protobuf:"bytes,10,opt,name=o_string,json=oString" json:"o_string,omitempty"`
+	OBytes               []byte   `protobuf:"bytes,11,opt,name=o_bytes,json=oBytes" json:"o_bytes,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *Simple) Reset()                    { *m = Simple{} }
-func (m *Simple) String() string            { return proto.CompactTextString(m) }
-func (*Simple) ProtoMessage()               {}
-func (*Simple) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+func (m *Simple) Reset()         { *m = Simple{} }
+func (m *Simple) String() string { return proto.CompactTextString(m) }
+func (*Simple) ProtoMessage()    {}
+func (*Simple) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{0}
+}
+func (m *Simple) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Simple.Unmarshal(m, b)
+}
+func (m *Simple) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Simple.Marshal(b, m, deterministic)
+}
+func (dst *Simple) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Simple.Merge(dst, src)
+}
+func (m *Simple) XXX_Size() int {
+	return xxx_messageInfo_Simple.Size(m)
+}
+func (m *Simple) XXX_DiscardUnknown() {
+	xxx_messageInfo_Simple.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Simple proto.InternalMessageInfo
 
 func (m *Simple) GetOBool() bool {
 	if m != nil && m.OBool != nil {
@@ -154,19 +183,40 @@
 
 // Test message for holding special non-finites primitives.
 type NonFinites struct {
-	FNan             *float32 `protobuf:"fixed32,1,opt,name=f_nan,json=fNan" json:"f_nan,omitempty"`
-	FPinf            *float32 `protobuf:"fixed32,2,opt,name=f_pinf,json=fPinf" json:"f_pinf,omitempty"`
-	FNinf            *float32 `protobuf:"fixed32,3,opt,name=f_ninf,json=fNinf" json:"f_ninf,omitempty"`
-	DNan             *float64 `protobuf:"fixed64,4,opt,name=d_nan,json=dNan" json:"d_nan,omitempty"`
-	DPinf            *float64 `protobuf:"fixed64,5,opt,name=d_pinf,json=dPinf" json:"d_pinf,omitempty"`
-	DNinf            *float64 `protobuf:"fixed64,6,opt,name=d_ninf,json=dNinf" json:"d_ninf,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
+	FNan                 *float32 `protobuf:"fixed32,1,opt,name=f_nan,json=fNan" json:"f_nan,omitempty"`
+	FPinf                *float32 `protobuf:"fixed32,2,opt,name=f_pinf,json=fPinf" json:"f_pinf,omitempty"`
+	FNinf                *float32 `protobuf:"fixed32,3,opt,name=f_ninf,json=fNinf" json:"f_ninf,omitempty"`
+	DNan                 *float64 `protobuf:"fixed64,4,opt,name=d_nan,json=dNan" json:"d_nan,omitempty"`
+	DPinf                *float64 `protobuf:"fixed64,5,opt,name=d_pinf,json=dPinf" json:"d_pinf,omitempty"`
+	DNinf                *float64 `protobuf:"fixed64,6,opt,name=d_ninf,json=dNinf" json:"d_ninf,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *NonFinites) Reset()                    { *m = NonFinites{} }
-func (m *NonFinites) String() string            { return proto.CompactTextString(m) }
-func (*NonFinites) ProtoMessage()               {}
-func (*NonFinites) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{1} }
+func (m *NonFinites) Reset()         { *m = NonFinites{} }
+func (m *NonFinites) String() string { return proto.CompactTextString(m) }
+func (*NonFinites) ProtoMessage()    {}
+func (*NonFinites) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{1}
+}
+func (m *NonFinites) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NonFinites.Unmarshal(m, b)
+}
+func (m *NonFinites) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NonFinites.Marshal(b, m, deterministic)
+}
+func (dst *NonFinites) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NonFinites.Merge(dst, src)
+}
+func (m *NonFinites) XXX_Size() int {
+	return xxx_messageInfo_NonFinites.Size(m)
+}
+func (m *NonFinites) XXX_DiscardUnknown() {
+	xxx_messageInfo_NonFinites.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NonFinites proto.InternalMessageInfo
 
 func (m *NonFinites) GetFNan() float32 {
 	if m != nil && m.FNan != nil {
@@ -212,24 +262,45 @@
 
 // Test message for holding repeated primitives.
 type Repeats struct {
-	RBool            []bool    `protobuf:"varint,1,rep,name=r_bool,json=rBool" json:"r_bool,omitempty"`
-	RInt32           []int32   `protobuf:"varint,2,rep,name=r_int32,json=rInt32" json:"r_int32,omitempty"`
-	RInt64           []int64   `protobuf:"varint,3,rep,name=r_int64,json=rInt64" json:"r_int64,omitempty"`
-	RUint32          []uint32  `protobuf:"varint,4,rep,name=r_uint32,json=rUint32" json:"r_uint32,omitempty"`
-	RUint64          []uint64  `protobuf:"varint,5,rep,name=r_uint64,json=rUint64" json:"r_uint64,omitempty"`
-	RSint32          []int32   `protobuf:"zigzag32,6,rep,name=r_sint32,json=rSint32" json:"r_sint32,omitempty"`
-	RSint64          []int64   `protobuf:"zigzag64,7,rep,name=r_sint64,json=rSint64" json:"r_sint64,omitempty"`
-	RFloat           []float32 `protobuf:"fixed32,8,rep,name=r_float,json=rFloat" json:"r_float,omitempty"`
-	RDouble          []float64 `protobuf:"fixed64,9,rep,name=r_double,json=rDouble" json:"r_double,omitempty"`
-	RString          []string  `protobuf:"bytes,10,rep,name=r_string,json=rString" json:"r_string,omitempty"`
-	RBytes           [][]byte  `protobuf:"bytes,11,rep,name=r_bytes,json=rBytes" json:"r_bytes,omitempty"`
-	XXX_unrecognized []byte    `json:"-"`
+	RBool                []bool    `protobuf:"varint,1,rep,name=r_bool,json=rBool" json:"r_bool,omitempty"`
+	RInt32               []int32   `protobuf:"varint,2,rep,name=r_int32,json=rInt32" json:"r_int32,omitempty"`
+	RInt64               []int64   `protobuf:"varint,3,rep,name=r_int64,json=rInt64" json:"r_int64,omitempty"`
+	RUint32              []uint32  `protobuf:"varint,4,rep,name=r_uint32,json=rUint32" json:"r_uint32,omitempty"`
+	RUint64              []uint64  `protobuf:"varint,5,rep,name=r_uint64,json=rUint64" json:"r_uint64,omitempty"`
+	RSint32              []int32   `protobuf:"zigzag32,6,rep,name=r_sint32,json=rSint32" json:"r_sint32,omitempty"`
+	RSint64              []int64   `protobuf:"zigzag64,7,rep,name=r_sint64,json=rSint64" json:"r_sint64,omitempty"`
+	RFloat               []float32 `protobuf:"fixed32,8,rep,name=r_float,json=rFloat" json:"r_float,omitempty"`
+	RDouble              []float64 `protobuf:"fixed64,9,rep,name=r_double,json=rDouble" json:"r_double,omitempty"`
+	RString              []string  `protobuf:"bytes,10,rep,name=r_string,json=rString" json:"r_string,omitempty"`
+	RBytes               [][]byte  `protobuf:"bytes,11,rep,name=r_bytes,json=rBytes" json:"r_bytes,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
+	XXX_unrecognized     []byte    `json:"-"`
+	XXX_sizecache        int32     `json:"-"`
 }
 
-func (m *Repeats) Reset()                    { *m = Repeats{} }
-func (m *Repeats) String() string            { return proto.CompactTextString(m) }
-func (*Repeats) ProtoMessage()               {}
-func (*Repeats) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{2} }
+func (m *Repeats) Reset()         { *m = Repeats{} }
+func (m *Repeats) String() string { return proto.CompactTextString(m) }
+func (*Repeats) ProtoMessage()    {}
+func (*Repeats) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{2}
+}
+func (m *Repeats) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Repeats.Unmarshal(m, b)
+}
+func (m *Repeats) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Repeats.Marshal(b, m, deterministic)
+}
+func (dst *Repeats) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Repeats.Merge(dst, src)
+}
+func (m *Repeats) XXX_Size() int {
+	return xxx_messageInfo_Repeats.Size(m)
+}
+func (m *Repeats) XXX_DiscardUnknown() {
+	xxx_messageInfo_Repeats.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Repeats proto.InternalMessageInfo
 
 func (m *Repeats) GetRBool() []bool {
 	if m != nil {
@@ -310,19 +381,40 @@
 
 // Test message for holding enums and nested messages.
 type Widget struct {
-	Color            *Widget_Color  `protobuf:"varint,1,opt,name=color,enum=jsonpb.Widget_Color" json:"color,omitempty"`
-	RColor           []Widget_Color `protobuf:"varint,2,rep,name=r_color,json=rColor,enum=jsonpb.Widget_Color" json:"r_color,omitempty"`
-	Simple           *Simple        `protobuf:"bytes,10,opt,name=simple" json:"simple,omitempty"`
-	RSimple          []*Simple      `protobuf:"bytes,11,rep,name=r_simple,json=rSimple" json:"r_simple,omitempty"`
-	Repeats          *Repeats       `protobuf:"bytes,20,opt,name=repeats" json:"repeats,omitempty"`
-	RRepeats         []*Repeats     `protobuf:"bytes,21,rep,name=r_repeats,json=rRepeats" json:"r_repeats,omitempty"`
-	XXX_unrecognized []byte         `json:"-"`
+	Color                *Widget_Color  `protobuf:"varint,1,opt,name=color,enum=jsonpb.Widget_Color" json:"color,omitempty"`
+	RColor               []Widget_Color `protobuf:"varint,2,rep,name=r_color,json=rColor,enum=jsonpb.Widget_Color" json:"r_color,omitempty"`
+	Simple               *Simple        `protobuf:"bytes,10,opt,name=simple" json:"simple,omitempty"`
+	RSimple              []*Simple      `protobuf:"bytes,11,rep,name=r_simple,json=rSimple" json:"r_simple,omitempty"`
+	Repeats              *Repeats       `protobuf:"bytes,20,opt,name=repeats" json:"repeats,omitempty"`
+	RRepeats             []*Repeats     `protobuf:"bytes,21,rep,name=r_repeats,json=rRepeats" json:"r_repeats,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}       `json:"-"`
+	XXX_unrecognized     []byte         `json:"-"`
+	XXX_sizecache        int32          `json:"-"`
 }
 
-func (m *Widget) Reset()                    { *m = Widget{} }
-func (m *Widget) String() string            { return proto.CompactTextString(m) }
-func (*Widget) ProtoMessage()               {}
-func (*Widget) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{3} }
+func (m *Widget) Reset()         { *m = Widget{} }
+func (m *Widget) String() string { return proto.CompactTextString(m) }
+func (*Widget) ProtoMessage()    {}
+func (*Widget) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{3}
+}
+func (m *Widget) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Widget.Unmarshal(m, b)
+}
+func (m *Widget) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Widget.Marshal(b, m, deterministic)
+}
+func (dst *Widget) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Widget.Merge(dst, src)
+}
+func (m *Widget) XXX_Size() int {
+	return xxx_messageInfo_Widget.Size(m)
+}
+func (m *Widget) XXX_DiscardUnknown() {
+	xxx_messageInfo_Widget.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Widget proto.InternalMessageInfo
 
 func (m *Widget) GetColor() Widget_Color {
 	if m != nil && m.Color != nil {
@@ -367,15 +459,36 @@
 }
 
 type Maps struct {
-	MInt64Str        map[int64]string `protobuf:"bytes,1,rep,name=m_int64_str,json=mInt64Str" json:"m_int64_str,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	MBoolSimple      map[bool]*Simple `protobuf:"bytes,2,rep,name=m_bool_simple,json=mBoolSimple" json:"m_bool_simple,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	XXX_unrecognized []byte           `json:"-"`
+	MInt64Str            map[int64]string `protobuf:"bytes,1,rep,name=m_int64_str,json=mInt64Str" json:"m_int64_str,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	MBoolSimple          map[bool]*Simple `protobuf:"bytes,2,rep,name=m_bool_simple,json=mBoolSimple" json:"m_bool_simple,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
 }
 
-func (m *Maps) Reset()                    { *m = Maps{} }
-func (m *Maps) String() string            { return proto.CompactTextString(m) }
-func (*Maps) ProtoMessage()               {}
-func (*Maps) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{4} }
+func (m *Maps) Reset()         { *m = Maps{} }
+func (m *Maps) String() string { return proto.CompactTextString(m) }
+func (*Maps) ProtoMessage()    {}
+func (*Maps) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{4}
+}
+func (m *Maps) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Maps.Unmarshal(m, b)
+}
+func (m *Maps) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Maps.Marshal(b, m, deterministic)
+}
+func (dst *Maps) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Maps.Merge(dst, src)
+}
+func (m *Maps) XXX_Size() int {
+	return xxx_messageInfo_Maps.Size(m)
+}
+func (m *Maps) XXX_DiscardUnknown() {
+	xxx_messageInfo_Maps.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Maps proto.InternalMessageInfo
 
 func (m *Maps) GetMInt64Str() map[int64]string {
 	if m != nil {
@@ -397,14 +510,36 @@
 	//	*MsgWithOneof_Salary
 	//	*MsgWithOneof_Country
 	//	*MsgWithOneof_HomeAddress
-	Union            isMsgWithOneof_Union `protobuf_oneof:"union"`
-	XXX_unrecognized []byte               `json:"-"`
+	//	*MsgWithOneof_MsgWithRequired
+	Union                isMsgWithOneof_Union `protobuf_oneof:"union"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
 }
 
-func (m *MsgWithOneof) Reset()                    { *m = MsgWithOneof{} }
-func (m *MsgWithOneof) String() string            { return proto.CompactTextString(m) }
-func (*MsgWithOneof) ProtoMessage()               {}
-func (*MsgWithOneof) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{5} }
+func (m *MsgWithOneof) Reset()         { *m = MsgWithOneof{} }
+func (m *MsgWithOneof) String() string { return proto.CompactTextString(m) }
+func (*MsgWithOneof) ProtoMessage()    {}
+func (*MsgWithOneof) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{5}
+}
+func (m *MsgWithOneof) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MsgWithOneof.Unmarshal(m, b)
+}
+func (m *MsgWithOneof) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MsgWithOneof.Marshal(b, m, deterministic)
+}
+func (dst *MsgWithOneof) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MsgWithOneof.Merge(dst, src)
+}
+func (m *MsgWithOneof) XXX_Size() int {
+	return xxx_messageInfo_MsgWithOneof.Size(m)
+}
+func (m *MsgWithOneof) XXX_DiscardUnknown() {
+	xxx_messageInfo_MsgWithOneof.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MsgWithOneof proto.InternalMessageInfo
 
 type isMsgWithOneof_Union interface {
 	isMsgWithOneof_Union()
@@ -422,11 +557,15 @@
 type MsgWithOneof_HomeAddress struct {
 	HomeAddress string `protobuf:"bytes,4,opt,name=home_address,json=homeAddress,oneof"`
 }
+type MsgWithOneof_MsgWithRequired struct {
+	MsgWithRequired *MsgWithRequired `protobuf:"bytes,5,opt,name=msg_with_required,json=msgWithRequired,oneof"`
+}
 
-func (*MsgWithOneof_Title) isMsgWithOneof_Union()       {}
-func (*MsgWithOneof_Salary) isMsgWithOneof_Union()      {}
-func (*MsgWithOneof_Country) isMsgWithOneof_Union()     {}
-func (*MsgWithOneof_HomeAddress) isMsgWithOneof_Union() {}
+func (*MsgWithOneof_Title) isMsgWithOneof_Union()           {}
+func (*MsgWithOneof_Salary) isMsgWithOneof_Union()          {}
+func (*MsgWithOneof_Country) isMsgWithOneof_Union()         {}
+func (*MsgWithOneof_HomeAddress) isMsgWithOneof_Union()     {}
+func (*MsgWithOneof_MsgWithRequired) isMsgWithOneof_Union() {}
 
 func (m *MsgWithOneof) GetUnion() isMsgWithOneof_Union {
 	if m != nil {
@@ -463,6 +602,13 @@
 	return ""
 }
 
+func (m *MsgWithOneof) GetMsgWithRequired() *MsgWithRequired {
+	if x, ok := m.GetUnion().(*MsgWithOneof_MsgWithRequired); ok {
+		return x.MsgWithRequired
+	}
+	return nil
+}
+
 // XXX_OneofFuncs is for the internal use of the proto package.
 func (*MsgWithOneof) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
 	return _MsgWithOneof_OneofMarshaler, _MsgWithOneof_OneofUnmarshaler, _MsgWithOneof_OneofSizer, []interface{}{
@@ -470,6 +616,7 @@
 		(*MsgWithOneof_Salary)(nil),
 		(*MsgWithOneof_Country)(nil),
 		(*MsgWithOneof_HomeAddress)(nil),
+		(*MsgWithOneof_MsgWithRequired)(nil),
 	}
 }
 
@@ -489,6 +636,11 @@
 	case *MsgWithOneof_HomeAddress:
 		b.EncodeVarint(4<<3 | proto.WireBytes)
 		b.EncodeStringBytes(x.HomeAddress)
+	case *MsgWithOneof_MsgWithRequired:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.MsgWithRequired); err != nil {
+			return err
+		}
 	case nil:
 	default:
 		return fmt.Errorf("MsgWithOneof.Union has unexpected type %T", x)
@@ -527,6 +679,14 @@
 		x, err := b.DecodeStringBytes()
 		m.Union = &MsgWithOneof_HomeAddress{x}
 		return true, err
+	case 5: // union.msg_with_required
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(MsgWithRequired)
+		err := b.DecodeMessage(msg)
+		m.Union = &MsgWithOneof_MsgWithRequired{msg}
+		return true, err
 	default:
 		return false, nil
 	}
@@ -537,20 +697,25 @@
 	// union
 	switch x := m.Union.(type) {
 	case *MsgWithOneof_Title:
-		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(len(x.Title)))
 		n += len(x.Title)
 	case *MsgWithOneof_Salary:
-		n += proto.SizeVarint(2<<3 | proto.WireVarint)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(x.Salary))
 	case *MsgWithOneof_Country:
-		n += proto.SizeVarint(3<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(len(x.Country)))
 		n += len(x.Country)
 	case *MsgWithOneof_HomeAddress:
-		n += proto.SizeVarint(4<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(len(x.HomeAddress)))
 		n += len(x.HomeAddress)
+	case *MsgWithOneof_MsgWithRequired:
+		s := proto.Size(x.MsgWithRequired)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
 	case nil:
 	default:
 		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
@@ -560,22 +725,43 @@
 
 type Real struct {
 	Value                        *float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *Real) Reset()                    { *m = Real{} }
-func (m *Real) String() string            { return proto.CompactTextString(m) }
-func (*Real) ProtoMessage()               {}
-func (*Real) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{6} }
+func (m *Real) Reset()         { *m = Real{} }
+func (m *Real) String() string { return proto.CompactTextString(m) }
+func (*Real) ProtoMessage()    {}
+func (*Real) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{6}
+}
 
 var extRange_Real = []proto.ExtensionRange{
-	{100, 536870911},
+	{Start: 100, End: 536870911},
 }
 
 func (*Real) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_Real
 }
+func (m *Real) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Real.Unmarshal(m, b)
+}
+func (m *Real) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Real.Marshal(b, m, deterministic)
+}
+func (dst *Real) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Real.Merge(dst, src)
+}
+func (m *Real) XXX_Size() int {
+	return xxx_messageInfo_Real.Size(m)
+}
+func (m *Real) XXX_DiscardUnknown() {
+	xxx_messageInfo_Real.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Real proto.InternalMessageInfo
 
 func (m *Real) GetValue() float64 {
 	if m != nil && m.Value != nil {
@@ -586,22 +772,43 @@
 
 type Complex struct {
 	Imaginary                    *float64 `protobuf:"fixed64,1,opt,name=imaginary" json:"imaginary,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *Complex) Reset()                    { *m = Complex{} }
-func (m *Complex) String() string            { return proto.CompactTextString(m) }
-func (*Complex) ProtoMessage()               {}
-func (*Complex) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{7} }
+func (m *Complex) Reset()         { *m = Complex{} }
+func (m *Complex) String() string { return proto.CompactTextString(m) }
+func (*Complex) ProtoMessage()    {}
+func (*Complex) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{7}
+}
 
 var extRange_Complex = []proto.ExtensionRange{
-	{100, 536870911},
+	{Start: 100, End: 536870911},
 }
 
 func (*Complex) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_Complex
 }
+func (m *Complex) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Complex.Unmarshal(m, b)
+}
+func (m *Complex) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Complex.Marshal(b, m, deterministic)
+}
+func (dst *Complex) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Complex.Merge(dst, src)
+}
+func (m *Complex) XXX_Size() int {
+	return xxx_messageInfo_Complex.Size(m)
+}
+func (m *Complex) XXX_DiscardUnknown() {
+	xxx_messageInfo_Complex.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Complex proto.InternalMessageInfo
 
 func (m *Complex) GetImaginary() float64 {
 	if m != nil && m.Imaginary != nil {
@@ -620,134 +827,324 @@
 }
 
 type KnownTypes struct {
-	An               *google_protobuf.Any          `protobuf:"bytes,14,opt,name=an" json:"an,omitempty"`
-	Dur              *google_protobuf1.Duration    `protobuf:"bytes,1,opt,name=dur" json:"dur,omitempty"`
-	St               *google_protobuf2.Struct      `protobuf:"bytes,12,opt,name=st" json:"st,omitempty"`
-	Ts               *google_protobuf3.Timestamp   `protobuf:"bytes,2,opt,name=ts" json:"ts,omitempty"`
-	Lv               *google_protobuf2.ListValue   `protobuf:"bytes,15,opt,name=lv" json:"lv,omitempty"`
-	Val              *google_protobuf2.Value       `protobuf:"bytes,16,opt,name=val" json:"val,omitempty"`
-	Dbl              *google_protobuf4.DoubleValue `protobuf:"bytes,3,opt,name=dbl" json:"dbl,omitempty"`
-	Flt              *google_protobuf4.FloatValue  `protobuf:"bytes,4,opt,name=flt" json:"flt,omitempty"`
-	I64              *google_protobuf4.Int64Value  `protobuf:"bytes,5,opt,name=i64" json:"i64,omitempty"`
-	U64              *google_protobuf4.UInt64Value `protobuf:"bytes,6,opt,name=u64" json:"u64,omitempty"`
-	I32              *google_protobuf4.Int32Value  `protobuf:"bytes,7,opt,name=i32" json:"i32,omitempty"`
-	U32              *google_protobuf4.UInt32Value `protobuf:"bytes,8,opt,name=u32" json:"u32,omitempty"`
-	Bool             *google_protobuf4.BoolValue   `protobuf:"bytes,9,opt,name=bool" json:"bool,omitempty"`
-	Str              *google_protobuf4.StringValue `protobuf:"bytes,10,opt,name=str" json:"str,omitempty"`
-	Bytes            *google_protobuf4.BytesValue  `protobuf:"bytes,11,opt,name=bytes" json:"bytes,omitempty"`
-	XXX_unrecognized []byte                        `json:"-"`
+	An                   *any.Any              `protobuf:"bytes,14,opt,name=an" json:"an,omitempty"`
+	Dur                  *duration.Duration    `protobuf:"bytes,1,opt,name=dur" json:"dur,omitempty"`
+	St                   *_struct.Struct       `protobuf:"bytes,12,opt,name=st" json:"st,omitempty"`
+	Ts                   *timestamp.Timestamp  `protobuf:"bytes,2,opt,name=ts" json:"ts,omitempty"`
+	Lv                   *_struct.ListValue    `protobuf:"bytes,15,opt,name=lv" json:"lv,omitempty"`
+	Val                  *_struct.Value        `protobuf:"bytes,16,opt,name=val" json:"val,omitempty"`
+	Dbl                  *wrappers.DoubleValue `protobuf:"bytes,3,opt,name=dbl" json:"dbl,omitempty"`
+	Flt                  *wrappers.FloatValue  `protobuf:"bytes,4,opt,name=flt" json:"flt,omitempty"`
+	I64                  *wrappers.Int64Value  `protobuf:"bytes,5,opt,name=i64" json:"i64,omitempty"`
+	U64                  *wrappers.UInt64Value `protobuf:"bytes,6,opt,name=u64" json:"u64,omitempty"`
+	I32                  *wrappers.Int32Value  `protobuf:"bytes,7,opt,name=i32" json:"i32,omitempty"`
+	U32                  *wrappers.UInt32Value `protobuf:"bytes,8,opt,name=u32" json:"u32,omitempty"`
+	Bool                 *wrappers.BoolValue   `protobuf:"bytes,9,opt,name=bool" json:"bool,omitempty"`
+	Str                  *wrappers.StringValue `protobuf:"bytes,10,opt,name=str" json:"str,omitempty"`
+	Bytes                *wrappers.BytesValue  `protobuf:"bytes,11,opt,name=bytes" json:"bytes,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}              `json:"-"`
+	XXX_unrecognized     []byte                `json:"-"`
+	XXX_sizecache        int32                 `json:"-"`
 }
 
-func (m *KnownTypes) Reset()                    { *m = KnownTypes{} }
-func (m *KnownTypes) String() string            { return proto.CompactTextString(m) }
-func (*KnownTypes) ProtoMessage()               {}
-func (*KnownTypes) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{8} }
+func (m *KnownTypes) Reset()         { *m = KnownTypes{} }
+func (m *KnownTypes) String() string { return proto.CompactTextString(m) }
+func (*KnownTypes) ProtoMessage()    {}
+func (*KnownTypes) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{8}
+}
+func (m *KnownTypes) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_KnownTypes.Unmarshal(m, b)
+}
+func (m *KnownTypes) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_KnownTypes.Marshal(b, m, deterministic)
+}
+func (dst *KnownTypes) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_KnownTypes.Merge(dst, src)
+}
+func (m *KnownTypes) XXX_Size() int {
+	return xxx_messageInfo_KnownTypes.Size(m)
+}
+func (m *KnownTypes) XXX_DiscardUnknown() {
+	xxx_messageInfo_KnownTypes.DiscardUnknown(m)
+}
 
-func (m *KnownTypes) GetAn() *google_protobuf.Any {
+var xxx_messageInfo_KnownTypes proto.InternalMessageInfo
+
+func (m *KnownTypes) GetAn() *any.Any {
 	if m != nil {
 		return m.An
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetDur() *google_protobuf1.Duration {
+func (m *KnownTypes) GetDur() *duration.Duration {
 	if m != nil {
 		return m.Dur
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetSt() *google_protobuf2.Struct {
+func (m *KnownTypes) GetSt() *_struct.Struct {
 	if m != nil {
 		return m.St
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetTs() *google_protobuf3.Timestamp {
+func (m *KnownTypes) GetTs() *timestamp.Timestamp {
 	if m != nil {
 		return m.Ts
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetLv() *google_protobuf2.ListValue {
+func (m *KnownTypes) GetLv() *_struct.ListValue {
 	if m != nil {
 		return m.Lv
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetVal() *google_protobuf2.Value {
+func (m *KnownTypes) GetVal() *_struct.Value {
 	if m != nil {
 		return m.Val
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetDbl() *google_protobuf4.DoubleValue {
+func (m *KnownTypes) GetDbl() *wrappers.DoubleValue {
 	if m != nil {
 		return m.Dbl
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetFlt() *google_protobuf4.FloatValue {
+func (m *KnownTypes) GetFlt() *wrappers.FloatValue {
 	if m != nil {
 		return m.Flt
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetI64() *google_protobuf4.Int64Value {
+func (m *KnownTypes) GetI64() *wrappers.Int64Value {
 	if m != nil {
 		return m.I64
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetU64() *google_protobuf4.UInt64Value {
+func (m *KnownTypes) GetU64() *wrappers.UInt64Value {
 	if m != nil {
 		return m.U64
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetI32() *google_protobuf4.Int32Value {
+func (m *KnownTypes) GetI32() *wrappers.Int32Value {
 	if m != nil {
 		return m.I32
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetU32() *google_protobuf4.UInt32Value {
+func (m *KnownTypes) GetU32() *wrappers.UInt32Value {
 	if m != nil {
 		return m.U32
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetBool() *google_protobuf4.BoolValue {
+func (m *KnownTypes) GetBool() *wrappers.BoolValue {
 	if m != nil {
 		return m.Bool
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetStr() *google_protobuf4.StringValue {
+func (m *KnownTypes) GetStr() *wrappers.StringValue {
 	if m != nil {
 		return m.Str
 	}
 	return nil
 }
 
-func (m *KnownTypes) GetBytes() *google_protobuf4.BytesValue {
+func (m *KnownTypes) GetBytes() *wrappers.BytesValue {
 	if m != nil {
 		return m.Bytes
 	}
 	return nil
 }
 
+// Test messages for marshaling/unmarshaling required fields.
+type MsgWithRequired struct {
+	Str                  *string  `protobuf:"bytes,1,req,name=str" json:"str,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *MsgWithRequired) Reset()         { *m = MsgWithRequired{} }
+func (m *MsgWithRequired) String() string { return proto.CompactTextString(m) }
+func (*MsgWithRequired) ProtoMessage()    {}
+func (*MsgWithRequired) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{9}
+}
+func (m *MsgWithRequired) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MsgWithRequired.Unmarshal(m, b)
+}
+func (m *MsgWithRequired) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MsgWithRequired.Marshal(b, m, deterministic)
+}
+func (dst *MsgWithRequired) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MsgWithRequired.Merge(dst, src)
+}
+func (m *MsgWithRequired) XXX_Size() int {
+	return xxx_messageInfo_MsgWithRequired.Size(m)
+}
+func (m *MsgWithRequired) XXX_DiscardUnknown() {
+	xxx_messageInfo_MsgWithRequired.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MsgWithRequired proto.InternalMessageInfo
+
+func (m *MsgWithRequired) GetStr() string {
+	if m != nil && m.Str != nil {
+		return *m.Str
+	}
+	return ""
+}
+
+type MsgWithIndirectRequired struct {
+	Subm                 *MsgWithRequired            `protobuf:"bytes,1,opt,name=subm" json:"subm,omitempty"`
+	MapField             map[string]*MsgWithRequired `protobuf:"bytes,2,rep,name=map_field,json=mapField" json:"map_field,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	SliceField           []*MsgWithRequired          `protobuf:"bytes,3,rep,name=slice_field,json=sliceField" json:"slice_field,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                    `json:"-"`
+	XXX_unrecognized     []byte                      `json:"-"`
+	XXX_sizecache        int32                       `json:"-"`
+}
+
+func (m *MsgWithIndirectRequired) Reset()         { *m = MsgWithIndirectRequired{} }
+func (m *MsgWithIndirectRequired) String() string { return proto.CompactTextString(m) }
+func (*MsgWithIndirectRequired) ProtoMessage()    {}
+func (*MsgWithIndirectRequired) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{10}
+}
+func (m *MsgWithIndirectRequired) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MsgWithIndirectRequired.Unmarshal(m, b)
+}
+func (m *MsgWithIndirectRequired) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MsgWithIndirectRequired.Marshal(b, m, deterministic)
+}
+func (dst *MsgWithIndirectRequired) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MsgWithIndirectRequired.Merge(dst, src)
+}
+func (m *MsgWithIndirectRequired) XXX_Size() int {
+	return xxx_messageInfo_MsgWithIndirectRequired.Size(m)
+}
+func (m *MsgWithIndirectRequired) XXX_DiscardUnknown() {
+	xxx_messageInfo_MsgWithIndirectRequired.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MsgWithIndirectRequired proto.InternalMessageInfo
+
+func (m *MsgWithIndirectRequired) GetSubm() *MsgWithRequired {
+	if m != nil {
+		return m.Subm
+	}
+	return nil
+}
+
+func (m *MsgWithIndirectRequired) GetMapField() map[string]*MsgWithRequired {
+	if m != nil {
+		return m.MapField
+	}
+	return nil
+}
+
+func (m *MsgWithIndirectRequired) GetSliceField() []*MsgWithRequired {
+	if m != nil {
+		return m.SliceField
+	}
+	return nil
+}
+
+type MsgWithRequiredBytes struct {
+	Byts                 []byte   `protobuf:"bytes,1,req,name=byts" json:"byts,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *MsgWithRequiredBytes) Reset()         { *m = MsgWithRequiredBytes{} }
+func (m *MsgWithRequiredBytes) String() string { return proto.CompactTextString(m) }
+func (*MsgWithRequiredBytes) ProtoMessage()    {}
+func (*MsgWithRequiredBytes) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{11}
+}
+func (m *MsgWithRequiredBytes) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MsgWithRequiredBytes.Unmarshal(m, b)
+}
+func (m *MsgWithRequiredBytes) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MsgWithRequiredBytes.Marshal(b, m, deterministic)
+}
+func (dst *MsgWithRequiredBytes) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MsgWithRequiredBytes.Merge(dst, src)
+}
+func (m *MsgWithRequiredBytes) XXX_Size() int {
+	return xxx_messageInfo_MsgWithRequiredBytes.Size(m)
+}
+func (m *MsgWithRequiredBytes) XXX_DiscardUnknown() {
+	xxx_messageInfo_MsgWithRequiredBytes.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MsgWithRequiredBytes proto.InternalMessageInfo
+
+func (m *MsgWithRequiredBytes) GetByts() []byte {
+	if m != nil {
+		return m.Byts
+	}
+	return nil
+}
+
+type MsgWithRequiredWKT struct {
+	Str                  *wrappers.StringValue `protobuf:"bytes,1,req,name=str" json:"str,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}              `json:"-"`
+	XXX_unrecognized     []byte                `json:"-"`
+	XXX_sizecache        int32                 `json:"-"`
+}
+
+func (m *MsgWithRequiredWKT) Reset()         { *m = MsgWithRequiredWKT{} }
+func (m *MsgWithRequiredWKT) String() string { return proto.CompactTextString(m) }
+func (*MsgWithRequiredWKT) ProtoMessage()    {}
+func (*MsgWithRequiredWKT) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_objects_c6f6c615ab823e65, []int{12}
+}
+func (m *MsgWithRequiredWKT) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MsgWithRequiredWKT.Unmarshal(m, b)
+}
+func (m *MsgWithRequiredWKT) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MsgWithRequiredWKT.Marshal(b, m, deterministic)
+}
+func (dst *MsgWithRequiredWKT) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MsgWithRequiredWKT.Merge(dst, src)
+}
+func (m *MsgWithRequiredWKT) XXX_Size() int {
+	return xxx_messageInfo_MsgWithRequiredWKT.Size(m)
+}
+func (m *MsgWithRequiredWKT) XXX_DiscardUnknown() {
+	xxx_messageInfo_MsgWithRequiredWKT.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MsgWithRequiredWKT proto.InternalMessageInfo
+
+func (m *MsgWithRequiredWKT) GetStr() *wrappers.StringValue {
+	if m != nil {
+		return m.Str
+	}
+	return nil
+}
+
 var E_Name = &proto.ExtensionDesc{
 	ExtendedType:  (*Real)(nil),
 	ExtensionType: (*string)(nil),
@@ -757,96 +1154,125 @@
 	Filename:      "test_objects.proto",
 }
 
+var E_Extm = &proto.ExtensionDesc{
+	ExtendedType:  (*Real)(nil),
+	ExtensionType: (*MsgWithRequired)(nil),
+	Field:         125,
+	Name:          "jsonpb.extm",
+	Tag:           "bytes,125,opt,name=extm",
+	Filename:      "test_objects.proto",
+}
+
 func init() {
 	proto.RegisterType((*Simple)(nil), "jsonpb.Simple")
 	proto.RegisterType((*NonFinites)(nil), "jsonpb.NonFinites")
 	proto.RegisterType((*Repeats)(nil), "jsonpb.Repeats")
 	proto.RegisterType((*Widget)(nil), "jsonpb.Widget")
 	proto.RegisterType((*Maps)(nil), "jsonpb.Maps")
+	proto.RegisterMapType((map[bool]*Simple)(nil), "jsonpb.Maps.MBoolSimpleEntry")
+	proto.RegisterMapType((map[int64]string)(nil), "jsonpb.Maps.MInt64StrEntry")
 	proto.RegisterType((*MsgWithOneof)(nil), "jsonpb.MsgWithOneof")
 	proto.RegisterType((*Real)(nil), "jsonpb.Real")
 	proto.RegisterType((*Complex)(nil), "jsonpb.Complex")
 	proto.RegisterType((*KnownTypes)(nil), "jsonpb.KnownTypes")
+	proto.RegisterType((*MsgWithRequired)(nil), "jsonpb.MsgWithRequired")
+	proto.RegisterType((*MsgWithIndirectRequired)(nil), "jsonpb.MsgWithIndirectRequired")
+	proto.RegisterMapType((map[string]*MsgWithRequired)(nil), "jsonpb.MsgWithIndirectRequired.MapFieldEntry")
+	proto.RegisterType((*MsgWithRequiredBytes)(nil), "jsonpb.MsgWithRequiredBytes")
+	proto.RegisterType((*MsgWithRequiredWKT)(nil), "jsonpb.MsgWithRequiredWKT")
 	proto.RegisterEnum("jsonpb.Widget_Color", Widget_Color_name, Widget_Color_value)
 	proto.RegisterExtension(E_Complex_RealExtension)
 	proto.RegisterExtension(E_Name)
+	proto.RegisterExtension(E_Extm)
 }
 
-func init() { proto.RegisterFile("test_objects.proto", fileDescriptor1) }
+func init() { proto.RegisterFile("test_objects.proto", fileDescriptor_test_objects_c6f6c615ab823e65) }
 
-var fileDescriptor1 = []byte{
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-	0xd5, 0x39, 0x32, 0x09, 0xf9, 0x09, 0x00, 0x00,
+var fileDescriptor_test_objects_c6f6c615ab823e65 = []byte{
+	// 1357 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x56, 0xdd, 0x72, 0x13, 0xc7,
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+	0x38, 0x0a, 0xc4, 0xa2, 0x22, 0xbb, 0x5c, 0x84, 0xe4, 0x06, 0x63, 0x13, 0x08, 0xe0, 0xa4, 0xc6,
+	0x26, 0x5c, 0xaa, 0x56, 0xde, 0x91, 0x59, 0xb2, 0xbb, 0xa3, 0xcc, 0xcc, 0xda, 0xa8, 0x92, 0x54,
+	0xf9, 0x19, 0x52, 0x79, 0x82, 0x54, 0x25, 0x8f, 0x90, 0x8b, 0xbc, 0x45, 0xde, 0x28, 0x35, 0x3d,
+	0xb3, 0x5a, 0x59, 0x42, 0x95, 0x5c, 0x79, 0xbb, 0xfb, 0xeb, 0x4f, 0x33, 0xfd, 0xf5, 0x74, 0x1b,
+	0x88, 0x62, 0x52, 0xf5, 0xf9, 0xe0, 0x1d, 0x3b, 0x51, 0xb2, 0x3b, 0x12, 0x5c, 0x71, 0x52, 0x7d,
+	0x27, 0x79, 0x36, 0x1a, 0x6c, 0xde, 0x3c, 0xe5, 0xfc, 0x34, 0x61, 0x0f, 0xd0, 0x3b, 0xc8, 0x87,
+	0x0f, 0xc2, 0x6c, 0x6c, 0x20, 0x9b, 0xff, 0x99, 0x0d, 0x45, 0xb9, 0x08, 0x55, 0xcc, 0x33, 0x1b,
+	0xbf, 0x35, 0x1b, 0x97, 0x4a, 0xe4, 0x27, 0xca, 0x46, 0xff, 0x3b, 0x1b, 0x55, 0x71, 0xca, 0xa4,
+	0x0a, 0xd3, 0xd1, 0x22, 0xfa, 0x73, 0x11, 0x8e, 0x46, 0x4c, 0xd8, 0x13, 0xb6, 0x7f, 0x75, 0xa1,
+	0x7a, 0x14, 0xa7, 0xa3, 0x84, 0x91, 0x6b, 0x50, 0xe5, 0xfd, 0x01, 0xe7, 0x49, 0xe0, 0xb4, 0x9c,
+	0x4e, 0x9d, 0xfa, 0x7c, 0x8f, 0xf3, 0x84, 0xdc, 0x80, 0x1a, 0xef, 0xc7, 0x99, 0xda, 0xee, 0x05,
+	0x6e, 0xcb, 0xe9, 0xf8, 0xb4, 0xca, 0x9f, 0x6b, 0x6b, 0x12, 0xd8, 0xdd, 0x09, 0xbc, 0x96, 0xd3,
+	0xf1, 0x4c, 0x60, 0x77, 0x87, 0xdc, 0x84, 0x3a, 0xef, 0xe7, 0x26, 0xa5, 0xd2, 0x72, 0x3a, 0x2b,
+	0xb4, 0xc6, 0x5f, 0xa3, 0x59, 0x86, 0x76, 0x77, 0x02, 0xbf, 0xe5, 0x74, 0x2a, 0x36, 0x54, 0x64,
+	0x49, 0x93, 0x55, 0x6d, 0x39, 0x9d, 0x2b, 0xb4, 0xc6, 0x8f, 0xa6, 0xb2, 0xa4, 0xc9, 0xaa, 0xb5,
+	0x9c, 0x0e, 0xb1, 0xa1, 0xdd, 0x1d, 0x73, 0x88, 0x61, 0xc2, 0x43, 0x15, 0xd4, 0x5b, 0x4e, 0xc7,
+	0xa5, 0x55, 0xfe, 0x54, 0x5b, 0x26, 0x27, 0xe2, 0xf9, 0x20, 0x61, 0x41, 0xa3, 0xe5, 0x74, 0x1c,
+	0x5a, 0xe3, 0xfb, 0x68, 0x5a, 0x3a, 0x25, 0xe2, 0xec, 0x34, 0x80, 0x96, 0xd3, 0x69, 0x68, 0x3a,
+	0x34, 0x0d, 0xdd, 0x60, 0xac, 0x98, 0x0c, 0x9a, 0x2d, 0xa7, 0xb3, 0x4c, 0xab, 0x7c, 0x4f, 0x5b,
+	0xed, 0x9f, 0x1c, 0x80, 0x43, 0x9e, 0x3d, 0x8d, 0xb3, 0x58, 0x31, 0x49, 0xae, 0x82, 0x3f, 0xec,
+	0x67, 0x61, 0x86, 0xa5, 0x72, 0x69, 0x65, 0x78, 0x18, 0x66, 0xba, 0x80, 0xc3, 0xfe, 0x28, 0xce,
+	0x86, 0x58, 0x28, 0x97, 0xfa, 0xc3, 0xaf, 0xe3, 0x6c, 0x68, 0xdc, 0x99, 0x76, 0x7b, 0xd6, 0x7d,
+	0xa8, 0xdd, 0x57, 0xc1, 0x8f, 0x90, 0xa2, 0x82, 0xa7, 0xab, 0x44, 0x96, 0x22, 0x32, 0x14, 0x3e,
+	0x7a, 0xfd, 0xa8, 0xa0, 0x88, 0x0c, 0x45, 0xd5, 0xba, 0x35, 0x45, 0xfb, 0x37, 0x17, 0x6a, 0x94,
+	0x8d, 0x58, 0xa8, 0xa4, 0x86, 0x88, 0x42, 0x3d, 0x4f, 0xab, 0x27, 0x0a, 0xf5, 0xc4, 0x44, 0x3d,
+	0x4f, 0xab, 0x27, 0x26, 0xea, 0x89, 0x89, 0x7a, 0x9e, 0x56, 0x4f, 0x4c, 0xd4, 0x13, 0xa5, 0x7a,
+	0x9e, 0x56, 0x4f, 0x94, 0xea, 0x89, 0x52, 0x3d, 0x4f, 0xab, 0x27, 0x4a, 0xf5, 0x44, 0xa9, 0x9e,
+	0xa7, 0xd5, 0x13, 0x47, 0x53, 0x59, 0x13, 0xf5, 0x3c, 0xad, 0x9e, 0x28, 0xd5, 0x13, 0x13, 0xf5,
+	0x3c, 0xad, 0x9e, 0x98, 0xa8, 0x27, 0x4a, 0xf5, 0x3c, 0xad, 0x9e, 0x28, 0xd5, 0x13, 0xa5, 0x7a,
+	0x9e, 0x56, 0x4f, 0x94, 0xea, 0x89, 0x89, 0x7a, 0x9e, 0x56, 0x4f, 0x18, 0xf5, 0x7e, 0x77, 0xa1,
+	0xfa, 0x26, 0x8e, 0x4e, 0x99, 0x22, 0xf7, 0xc0, 0x3f, 0xe1, 0x09, 0x17, 0xa8, 0xdc, 0x6a, 0x6f,
+	0xa3, 0x6b, 0x9e, 0x68, 0xd7, 0x84, 0xbb, 0x4f, 0x74, 0x8c, 0x1a, 0x08, 0xd9, 0xd2, 0x7c, 0x06,
+	0xad, 0x8b, 0xb7, 0x08, 0x5d, 0x15, 0xf8, 0x97, 0xdc, 0x85, 0xaa, 0xc4, 0xa7, 0x84, 0x5d, 0xd5,
+	0xec, 0xad, 0x16, 0x68, 0xf3, 0xc0, 0xa8, 0x8d, 0x92, 0x8f, 0x4c, 0x41, 0x10, 0xa9, 0xcf, 0x39,
+	0x8f, 0xd4, 0x05, 0xb2, 0xd0, 0x9a, 0x30, 0x02, 0x07, 0x1b, 0xc8, 0xb9, 0x56, 0x20, 0xad, 0xee,
+	0xb4, 0x88, 0x93, 0x8f, 0xa1, 0x21, 0xfa, 0x05, 0xf8, 0x1a, 0xd2, 0xce, 0x81, 0xeb, 0xc2, 0x7e,
+	0xb5, 0xff, 0x07, 0xbe, 0x39, 0x74, 0x0d, 0x3c, 0x7a, 0xb0, 0xbf, 0xbe, 0x44, 0x1a, 0xe0, 0x7f,
+	0x41, 0x0f, 0x0e, 0x0e, 0xd7, 0x1d, 0x52, 0x87, 0xca, 0xde, 0xcb, 0xd7, 0x07, 0xeb, 0x6e, 0xfb,
+	0x67, 0x17, 0x2a, 0xaf, 0xc2, 0x91, 0x24, 0x9f, 0x41, 0x33, 0x35, 0xed, 0xa2, 0x6b, 0x8f, 0x3d,
+	0xd6, 0xec, 0xfd, 0xab, 0xe0, 0xd7, 0x90, 0xee, 0x2b, 0xec, 0x9f, 0x23, 0x25, 0x0e, 0x32, 0x25,
+	0xc6, 0xb4, 0x91, 0x16, 0x36, 0x79, 0x0c, 0x2b, 0x29, 0xf6, 0x66, 0x71, 0x6b, 0x17, 0xd3, 0xff,
+	0x7d, 0x39, 0x5d, 0xf7, 0xab, 0xb9, 0xb6, 0x21, 0x68, 0xa6, 0xa5, 0x67, 0xf3, 0x73, 0x58, 0xbd,
+	0xcc, 0x4f, 0xd6, 0xc1, 0xfb, 0x96, 0x8d, 0x51, 0x46, 0x8f, 0xea, 0x4f, 0xb2, 0x01, 0xfe, 0x59,
+	0x98, 0xe4, 0x0c, 0x9f, 0x5f, 0x83, 0x1a, 0xe3, 0x91, 0xfb, 0xd0, 0xd9, 0x3c, 0x84, 0xf5, 0x59,
+	0xfa, 0xe9, 0xfc, 0xba, 0xc9, 0xbf, 0x33, 0x9d, 0x3f, 0x2f, 0x4a, 0xc9, 0xd7, 0xfe, 0xd3, 0x81,
+	0xe5, 0x57, 0xf2, 0xf4, 0x4d, 0xac, 0xde, 0x7e, 0x95, 0x31, 0x3e, 0x24, 0xd7, 0xc1, 0x57, 0xb1,
+	0x4a, 0x18, 0xd2, 0x35, 0x9e, 0x2d, 0x51, 0x63, 0x92, 0x00, 0xaa, 0x32, 0x4c, 0x42, 0x31, 0x46,
+	0x4e, 0xef, 0xd9, 0x12, 0xb5, 0x36, 0xd9, 0x84, 0xda, 0x13, 0x9e, 0xeb, 0x93, 0xe0, 0x58, 0xd0,
+	0x39, 0x85, 0x83, 0xdc, 0x86, 0xe5, 0xb7, 0x3c, 0x65, 0xfd, 0x30, 0x8a, 0x04, 0x93, 0x12, 0x27,
+	0x84, 0x06, 0x34, 0xb5, 0xf7, 0xb1, 0x71, 0x92, 0x03, 0xb8, 0x92, 0xca, 0xd3, 0xfe, 0x79, 0xac,
+	0xde, 0xf6, 0x05, 0xfb, 0x2e, 0x8f, 0x05, 0x8b, 0x70, 0x6a, 0x34, 0x7b, 0x37, 0x26, 0x85, 0x35,
+	0x67, 0xa4, 0x36, 0xfc, 0x6c, 0x89, 0xae, 0xa5, 0x97, 0x5d, 0x7b, 0x35, 0xf0, 0xf3, 0x2c, 0xe6,
+	0x59, 0xfb, 0x2e, 0x54, 0x28, 0x0b, 0x93, 0xb2, 0x8a, 0x8e, 0x19, 0x35, 0x68, 0xdc, 0xab, 0xd7,
+	0xa3, 0xf5, 0x8b, 0x8b, 0x8b, 0x0b, 0xb7, 0x7d, 0xae, 0x0f, 0xae, 0x0b, 0xf2, 0x9e, 0xdc, 0x82,
+	0x46, 0x9c, 0x86, 0xa7, 0x71, 0xa6, 0x2f, 0x68, 0xe0, 0xa5, 0xa3, 0x4c, 0xe9, 0xed, 0xc3, 0xaa,
+	0x60, 0x61, 0xd2, 0x67, 0xef, 0x15, 0xcb, 0x64, 0xcc, 0x33, 0xb2, 0x5c, 0x76, 0x66, 0x98, 0x04,
+	0xdf, 0x5f, 0x6e, 0x6d, 0x4b, 0x4f, 0x57, 0x74, 0xd2, 0x41, 0x91, 0xd3, 0xfe, 0xc3, 0x07, 0x78,
+	0x91, 0xf1, 0xf3, 0xec, 0x78, 0x3c, 0x62, 0x92, 0xdc, 0x01, 0x37, 0xcc, 0x82, 0x55, 0x4c, 0xdd,
+	0xe8, 0x9a, 0x35, 0xd7, 0x2d, 0xd6, 0x5c, 0xf7, 0x71, 0x36, 0xa6, 0x6e, 0x98, 0x91, 0xfb, 0xe0,
+	0x45, 0xb9, 0x79, 0xec, 0xcd, 0xde, 0xcd, 0x39, 0xd8, 0xbe, 0x5d, 0xb6, 0x54, 0xa3, 0xc8, 0xff,
+	0xc1, 0x95, 0x2a, 0x58, 0xb6, 0x35, 0x9c, 0xc5, 0x1e, 0xe1, 0xe2, 0xa5, 0xae, 0xd4, 0x43, 0xc4,
+	0x55, 0xd2, 0xb6, 0xc9, 0xe6, 0x1c, 0xf0, 0xb8, 0xd8, 0xc1, 0xd4, 0x55, 0x52, 0x63, 0x93, 0xb3,
+	0x60, 0x6d, 0x01, 0xf6, 0x65, 0x2c, 0xd5, 0x37, 0xba, 0xc2, 0xd4, 0x4d, 0xce, 0x48, 0x07, 0xbc,
+	0xb3, 0x30, 0x09, 0xd6, 0x11, 0x7c, 0x7d, 0x0e, 0x6c, 0x80, 0x1a, 0x42, 0xba, 0xe0, 0x45, 0x83,
+	0x04, 0x5b, 0xa7, 0xd9, 0xbb, 0x35, 0x7f, 0x2f, 0x9c, 0x95, 0x16, 0x1f, 0x0d, 0x12, 0xb2, 0x05,
+	0xde, 0x30, 0x51, 0xd8, 0x49, 0xfa, 0xdd, 0xce, 0xe2, 0x71, 0xea, 0x5a, 0xf8, 0x30, 0x51, 0x1a,
+	0x1e, 0xdb, 0x15, 0xfd, 0x21, 0x38, 0xbe, 0x44, 0x0b, 0x8f, 0x77, 0x77, 0xf4, 0x69, 0xf2, 0xdd,
+	0x1d, 0x5c, 0x4e, 0x1f, 0x3a, 0xcd, 0xeb, 0x69, 0x7c, 0xbe, 0xbb, 0x83, 0xf4, 0xdb, 0x3d, 0xdc,
+	0xe5, 0x0b, 0xe8, 0xb7, 0x7b, 0x05, 0xfd, 0x76, 0x0f, 0xe9, 0xb7, 0x7b, 0xb8, 0xe0, 0x17, 0xd1,
+	0x4f, 0xf0, 0x39, 0xe2, 0x2b, 0xb8, 0x09, 0x1b, 0x0b, 0x8a, 0xae, 0x47, 0x81, 0x81, 0x23, 0x4e,
+	0xf3, 0xeb, 0xa1, 0x06, 0x0b, 0xf8, 0xcd, 0x76, 0xb1, 0xfc, 0x52, 0x09, 0xf2, 0x09, 0xf8, 0xe5,
+	0xff, 0x08, 0x1f, 0xba, 0x00, 0x6e, 0x1d, 0x93, 0x60, 0x90, 0xed, 0xdb, 0xb0, 0x36, 0xf3, 0x18,
+	0xf5, 0x00, 0x32, 0xa3, 0xd4, 0xed, 0x34, 0x90, 0xb7, 0xfd, 0x8b, 0x0b, 0x37, 0x2c, 0xea, 0x79,
+	0x16, 0xc5, 0x82, 0x9d, 0xa8, 0x09, 0xfa, 0x3e, 0x54, 0x64, 0x3e, 0x48, 0x6d, 0x27, 0x2f, 0x7a,
+	0xe1, 0x14, 0x41, 0xe4, 0x4b, 0x68, 0xa4, 0xe1, 0xa8, 0x3f, 0x8c, 0x59, 0x12, 0xd9, 0x61, 0xbb,
+	0x35, 0x93, 0x31, 0xfb, 0x03, 0x7a, 0x08, 0x3f, 0xd5, 0x78, 0x33, 0x7c, 0xeb, 0xa9, 0x35, 0xc9,
+	0x43, 0x68, 0xca, 0x24, 0x3e, 0x61, 0x96, 0xcd, 0x43, 0xb6, 0x85, 0xbf, 0x0f, 0x88, 0xc5, 0xcc,
+	0xcd, 0x63, 0x58, 0xb9, 0x44, 0x3a, 0x3d, 0x72, 0x1b, 0x66, 0xe4, 0x6e, 0x5d, 0x1e, 0xb9, 0x0b,
+	0x69, 0xa7, 0x66, 0xef, 0x3d, 0xd8, 0x98, 0x89, 0x62, 0xb5, 0x09, 0x81, 0xca, 0x60, 0xac, 0x24,
+	0xd6, 0x73, 0x99, 0xe2, 0x77, 0x7b, 0x1f, 0xc8, 0x0c, 0xf6, 0xcd, 0x8b, 0xe3, 0x42, 0x6e, 0x0d,
+	0xfc, 0x27, 0x72, 0x3f, 0x6a, 0x41, 0x25, 0x0b, 0x53, 0x36, 0x33, 0xb4, 0x7e, 0xc0, 0x5b, 0x60,
+	0xe4, 0xd1, 0xa7, 0x50, 0x61, 0xef, 0x55, 0x3a, 0x83, 0xf8, 0xf1, 0x6f, 0xa4, 0xd2, 0x29, 0x7f,
+	0x05, 0x00, 0x00, 0xff, 0xff, 0xea, 0x06, 0x1a, 0xa9, 0x37, 0x0c, 0x00, 0x00,
 }
diff --git a/jsonpb/jsonpb_test_proto/test_objects.proto b/jsonpb/jsonpb_test_proto/test_objects.proto
index 0d2fc1f..36eb6e8 100644
--- a/jsonpb/jsonpb_test_proto/test_objects.proto
+++ b/jsonpb/jsonpb_test_proto/test_objects.proto
@@ -107,6 +107,7 @@
     int64 salary = 2;
     string Country = 3;
     string home_address = 4;
+    MsgWithRequired msg_with_required = 5;
   }
 }
 
@@ -145,3 +146,26 @@
   optional google.protobuf.StringValue str = 10;
   optional google.protobuf.BytesValue bytes = 11;
 }
+
+// Test messages for marshaling/unmarshaling required fields.
+message MsgWithRequired {
+  required string str = 1;
+}
+
+message MsgWithIndirectRequired {
+  optional MsgWithRequired subm = 1;
+  map<string, MsgWithRequired> map_field = 2;
+  repeated MsgWithRequired slice_field = 3;
+}
+
+message MsgWithRequiredBytes {
+  required bytes byts = 1;
+}
+
+message MsgWithRequiredWKT {
+  required google.protobuf.StringValue str = 1;
+}
+
+extend Real {
+  optional MsgWithRequired extm = 125;
+}
diff --git a/proto/Makefile b/proto/Makefile
deleted file mode 100644
index e2e0651..0000000
--- a/proto/Makefile
+++ /dev/null
@@ -1,43 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-install:
-	go install
-
-test: install generate-test-pbs
-	go test
-
-
-generate-test-pbs:
-	make install
-	make -C testdata
-	protoc --go_out=Mtestdata/test.proto=github.com/golang/protobuf/proto/testdata,Mgoogle/protobuf/any.proto=github.com/golang/protobuf/ptypes/any:. proto3_proto/proto3.proto
-	make
diff --git a/proto/all_test.go b/proto/all_test.go
index 41451a4..361f72f 100644
--- a/proto/all_test.go
+++ b/proto/all_test.go
@@ -41,11 +41,12 @@
 	"reflect"
 	"runtime/debug"
 	"strings"
+	"sync"
 	"testing"
 	"time"
 
 	. "github.com/golang/protobuf/proto"
-	. "github.com/golang/protobuf/proto/testdata"
+	. "github.com/golang/protobuf/proto/test_proto"
 )
 
 var globalO *Buffer
@@ -114,6 +115,8 @@
 		pb.F_BytesDefaulted = Default_GoTest_F_BytesDefaulted
 		pb.F_Sint32Defaulted = Int32(Default_GoTest_F_Sint32Defaulted)
 		pb.F_Sint64Defaulted = Int64(Default_GoTest_F_Sint64Defaulted)
+		pb.F_Sfixed32Defaulted = Int32(Default_GoTest_F_Sfixed32Defaulted)
+		pb.F_Sfixed64Defaulted = Int64(Default_GoTest_F_Sfixed64Defaulted)
 	}
 
 	pb.Kind = GoTest_TIME.Enum()
@@ -131,135 +134,13 @@
 	pb.F_BytesRequired = []byte("bytes")
 	pb.F_Sint32Required = Int32(-32)
 	pb.F_Sint64Required = Int64(-64)
+	pb.F_Sfixed32Required = Int32(-32)
+	pb.F_Sfixed64Required = Int64(-64)
 	pb.Requiredgroup = initGoTest_RequiredGroup()
 
 	return pb
 }
 
-func fail(msg string, b *bytes.Buffer, s string, t *testing.T) {
-	data := b.Bytes()
-	ld := len(data)
-	ls := len(s) / 2
-
-	fmt.Printf("fail %s ld=%d ls=%d\n", msg, ld, ls)
-
-	// find the interesting spot - n
-	n := ls
-	if ld < ls {
-		n = ld
-	}
-	j := 0
-	for i := 0; i < n; i++ {
-		bs := hex(s[j])*16 + hex(s[j+1])
-		j += 2
-		if data[i] == bs {
-			continue
-		}
-		n = i
-		break
-	}
-	l := n - 10
-	if l < 0 {
-		l = 0
-	}
-	h := n + 10
-
-	// find the interesting spot - n
-	fmt.Printf("is[%d]:", l)
-	for i := l; i < h; i++ {
-		if i >= ld {
-			fmt.Printf(" --")
-			continue
-		}
-		fmt.Printf(" %.2x", data[i])
-	}
-	fmt.Printf("\n")
-
-	fmt.Printf("sb[%d]:", l)
-	for i := l; i < h; i++ {
-		if i >= ls {
-			fmt.Printf(" --")
-			continue
-		}
-		bs := hex(s[j])*16 + hex(s[j+1])
-		j += 2
-		fmt.Printf(" %.2x", bs)
-	}
-	fmt.Printf("\n")
-
-	t.Fail()
-
-	//	t.Errorf("%s: \ngood: %s\nbad: %x", msg, s, b.Bytes())
-	// Print the output in a partially-decoded format; can
-	// be helpful when updating the test.  It produces the output
-	// that is pasted, with minor edits, into the argument to verify().
-	//	data := b.Bytes()
-	//	nesting := 0
-	//	for b.Len() > 0 {
-	//		start := len(data) - b.Len()
-	//		var u uint64
-	//		u, err := DecodeVarint(b)
-	//		if err != nil {
-	//			fmt.Printf("decode error on varint:", err)
-	//			return
-	//		}
-	//		wire := u & 0x7
-	//		tag := u >> 3
-	//		switch wire {
-	//		case WireVarint:
-	//			v, err := DecodeVarint(b)
-	//			if err != nil {
-	//				fmt.Printf("decode error on varint:", err)
-	//				return
-	//			}
-	//			fmt.Printf("\t\t\"%x\"  // field %d, encoding %d, value %d\n",
-	//				data[start:len(data)-b.Len()], tag, wire, v)
-	//		case WireFixed32:
-	//			v, err := DecodeFixed32(b)
-	//			if err != nil {
-	//				fmt.Printf("decode error on fixed32:", err)
-	//				return
-	//			}
-	//			fmt.Printf("\t\t\"%x\"  // field %d, encoding %d, value %d\n",
-	//				data[start:len(data)-b.Len()], tag, wire, v)
-	//		case WireFixed64:
-	//			v, err := DecodeFixed64(b)
-	//			if err != nil {
-	//				fmt.Printf("decode error on fixed64:", err)
-	//				return
-	//			}
-	//			fmt.Printf("\t\t\"%x\"  // field %d, encoding %d, value %d\n",
-	//				data[start:len(data)-b.Len()], tag, wire, v)
-	//		case WireBytes:
-	//			nb, err := DecodeVarint(b)
-	//			if err != nil {
-	//				fmt.Printf("decode error on bytes:", err)
-	//				return
-	//			}
-	//			after_tag := len(data) - b.Len()
-	//			str := make([]byte, nb)
-	//			_, err = b.Read(str)
-	//			if err != nil {
-	//				fmt.Printf("decode error on bytes:", err)
-	//				return
-	//			}
-	//			fmt.Printf("\t\t\"%x\" \"%x\"  // field %d, encoding %d (FIELD)\n",
-	//				data[start:after_tag], str, tag, wire)
-	//		case WireStartGroup:
-	//			nesting++
-	//			fmt.Printf("\t\t\"%x\"\t\t// start group field %d level %d\n",
-	//				data[start:len(data)-b.Len()], tag, nesting)
-	//		case WireEndGroup:
-	//			fmt.Printf("\t\t\"%x\"\t\t// end group field %d level %d\n",
-	//				data[start:len(data)-b.Len()], tag, nesting)
-	//			nesting--
-	//		default:
-	//			fmt.Printf("unrecognized wire type %d\n", wire)
-	//			return
-	//		}
-	//	}
-}
-
 func hex(c uint8) uint8 {
 	if '0' <= c && c <= '9' {
 		return c - '0'
@@ -482,6 +363,48 @@
 	}
 }
 
+// Ensure that Buffer.Marshal uses O(N) memory for N messages
+func TestBufferMarshalAllocs(t *testing.T) {
+	value := &OtherMessage{Key: Int64(1)}
+	msg := &MyMessage{Count: Int32(1), Others: []*OtherMessage{value}}
+
+	reallocSize := func(t *testing.T, items int, prealloc int) (int64, int64) {
+		var b Buffer
+		b.SetBuf(make([]byte, 0, prealloc))
+
+		var allocSpace int64
+		prevCap := cap(b.Bytes())
+		for i := 0; i < items; i++ {
+			err := b.Marshal(msg)
+			if err != nil {
+				t.Errorf("Marshal err = %q", err)
+				break
+			}
+			if c := cap(b.Bytes()); prevCap != c {
+				allocSpace += int64(c)
+				prevCap = c
+			}
+		}
+		needSpace := int64(len(b.Bytes()))
+		return allocSpace, needSpace
+	}
+
+	for _, prealloc := range []int{0, 100, 10000} {
+		for _, items := range []int{1, 2, 5, 10, 20, 50, 100, 200, 500, 1000} {
+			runtimeSpace, need := reallocSize(t, items, prealloc)
+			totalSpace := int64(prealloc) + runtimeSpace
+
+			runtimeRatio := float64(runtimeSpace) / float64(need)
+			totalRatio := float64(totalSpace) / float64(need)
+
+			if totalRatio < 1 || runtimeRatio > 4 {
+				t.Errorf("needed %dB, allocated %dB total (ratio %.1f), allocated %dB at runtime (ratio %.1f)",
+					need, totalSpace, totalRatio, runtimeSpace, runtimeRatio)
+			}
+		}
+	}
+}
+
 // Simple tests for bytes
 func TestBytesPrimitives(t *testing.T) {
 	o := old()
@@ -519,7 +442,7 @@
 	err := o.Marshal(pb)
 	if err == nil {
 		t.Error("did not catch missing required fields")
-	} else if strings.Index(err.Error(), "Kind") < 0 {
+	} else if !strings.Contains(err.Error(), "Kind") {
 		t.Error("wrong error type:", err)
 	}
 }
@@ -612,7 +535,9 @@
 			"b404"+ // field 70, encoding 4, end group
 			"aa0605"+"6279746573"+ // field 101, encoding 2, string "bytes"
 			"b0063f"+ // field 102, encoding 0, 0x3f zigzag32
-			"b8067f") // field 103, encoding 0, 0x7f zigzag64
+			"b8067f"+ // field 103, encoding 0, 0x7f zigzag64
+			"c506e0ffffff"+ // field 104, encoding 5, -32 fixed32
+			"c906c0ffffffffffffff") // field 105, encoding 1, -64 fixed64
 }
 
 // All required fields set, defaults provided.
@@ -647,9 +572,13 @@
 			"aa0605"+"6279746573"+ // field 101, encoding 2 string "bytes"
 			"b0063f"+ // field 102, encoding 0, 0x3f zigzag32
 			"b8067f"+ // field 103, encoding 0, 0x7f zigzag64
+			"c506e0ffffff"+ // field 104, encoding 5, -32 fixed32
+			"c906c0ffffffffffffff"+ // field 105, encoding 1, -64 fixed64
 			"8a1907"+"4269676e6f7365"+ // field 401, encoding 2, string "Bignose"
 			"90193f"+ // field 402, encoding 0, value 63
-			"98197f") // field 403, encoding 0, value 127
+			"98197f"+ // field 403, encoding 0, value 127
+			"a519e0ffffff"+ // field 404, encoding 5, -32 fixed32
+			"a919c0ffffffffffffff") // field 405, encoding 1, -64 fixed64
 
 }
 
@@ -669,6 +598,8 @@
 	pb.F_BytesDefaulted = []byte("Bignose")
 	pb.F_Sint32Defaulted = Int32(-32)
 	pb.F_Sint64Defaulted = Int64(-64)
+	pb.F_Sfixed32Defaulted = Int32(-32)
+	pb.F_Sfixed64Defaulted = Int64(-64)
 
 	overify(t, pb,
 		"0807"+ // field 1, encoding 0, value 7
@@ -699,9 +630,13 @@
 			"aa0605"+"6279746573"+ // field 101, encoding 2 string "bytes"
 			"b0063f"+ // field 102, encoding 0, 0x3f zigzag32
 			"b8067f"+ // field 103, encoding 0, 0x7f zigzag64
+			"c506e0ffffff"+ // field 104, encoding 5, -32 fixed32
+			"c906c0ffffffffffffff"+ // field 105, encoding 1, -64 fixed64
 			"8a1907"+"4269676e6f7365"+ // field 401, encoding 2, string "Bignose"
 			"90193f"+ // field 402, encoding 0, value 63
-			"98197f") // field 403, encoding 0, value 127
+			"98197f"+ // field 403, encoding 0, value 127
+			"a519e0ffffff"+ // field 404, encoding 5, -32 fixed32
+			"a919c0ffffffffffffff") // field 405, encoding 1, -64 fixed64
 
 }
 
@@ -724,6 +659,8 @@
 	pb.F_BytesOptional = []byte("Bignose")
 	pb.F_Sint32Optional = Int32(-32)
 	pb.F_Sint64Optional = Int64(-64)
+	pb.F_Sfixed32Optional = Int32(-32)
+	pb.F_Sfixed64Optional = Int64(-64)
 	pb.Optionalgroup = initGoTest_OptionalGroup()
 
 	overify(t, pb,
@@ -771,12 +708,18 @@
 			"aa0605"+"6279746573"+ // field 101, encoding 2 string "bytes"
 			"b0063f"+ // field 102, encoding 0, 0x3f zigzag32
 			"b8067f"+ // field 103, encoding 0, 0x7f zigzag64
+			"c506e0ffffff"+ // field 104, encoding 5, -32 fixed32
+			"c906c0ffffffffffffff"+ // field 105, encoding 1, -64 fixed64
 			"ea1207"+"4269676e6f7365"+ // field 301, encoding 2, string "Bignose"
 			"f0123f"+ // field 302, encoding 0, value 63
 			"f8127f"+ // field 303, encoding 0, value 127
+			"8513e0ffffff"+ // field 304, encoding 5, -32 fixed32
+			"8913c0ffffffffffffff"+ // field 305, encoding 1, -64 fixed64
 			"8a1907"+"4269676e6f7365"+ // field 401, encoding 2, string "Bignose"
 			"90193f"+ // field 402, encoding 0, value 63
-			"98197f") // field 403, encoding 0, value 127
+			"98197f"+ // field 403, encoding 0, value 127
+			"a519e0ffffff"+ // field 404, encoding 5, -32 fixed32
+			"a919c0ffffffffffffff") // field 405, encoding 1, -64 fixed64
 
 }
 
@@ -797,6 +740,8 @@
 	pb.F_BytesRepeated = [][]byte{[]byte("big"), []byte("nose")}
 	pb.F_Sint32Repeated = []int32{32, -32}
 	pb.F_Sint64Repeated = []int64{64, -64}
+	pb.F_Sfixed32Repeated = []int32{32, -32}
+	pb.F_Sfixed64Repeated = []int64{64, -64}
 	pb.Repeatedgroup = []*GoTest_RepeatedGroup{initGoTest_RepeatedGroup(), initGoTest_RepeatedGroup()}
 
 	overify(t, pb,
@@ -856,15 +801,23 @@
 			"aa0605"+"6279746573"+ // field 101, encoding 2 string "bytes"
 			"b0063f"+ // field 102, encoding 0, 0x3f zigzag32
 			"b8067f"+ // field 103, encoding 0, 0x7f zigzag64
+			"c506e0ffffff"+ // field 104, encoding 5, -32 fixed32
+			"c906c0ffffffffffffff"+ // field 105, encoding 1, -64 fixed64
 			"ca0c03"+"626967"+ // field 201, encoding 2, string "big"
 			"ca0c04"+"6e6f7365"+ // field 201, encoding 2, string "nose"
 			"d00c40"+ // field 202, encoding 0, value 32
 			"d00c3f"+ // field 202, encoding 0, value -32
 			"d80c8001"+ // field 203, encoding 0, value 64
 			"d80c7f"+ // field 203, encoding 0, value -64
+			"e50c20000000"+ // field 204, encoding 5, 32 fixed32
+			"e50ce0ffffff"+ // field 204, encoding 5, -32 fixed32
+			"e90c4000000000000000"+ // field 205, encoding 1, 64 fixed64
+			"e90cc0ffffffffffffff"+ // field 205, encoding 1, -64 fixed64
 			"8a1907"+"4269676e6f7365"+ // field 401, encoding 2, string "Bignose"
 			"90193f"+ // field 402, encoding 0, value 63
-			"98197f") // field 403, encoding 0, value 127
+			"98197f"+ // field 403, encoding 0, value 127
+			"a519e0ffffff"+ // field 404, encoding 5, -32 fixed32
+			"a919c0ffffffffffffff") // field 405, encoding 1, -64 fixed64
 
 }
 
@@ -882,6 +835,8 @@
 	pb.F_DoubleRepeatedPacked = []float64{64., 65.}
 	pb.F_Sint32RepeatedPacked = []int32{32, -32}
 	pb.F_Sint64RepeatedPacked = []int64{64, -64}
+	pb.F_Sfixed32RepeatedPacked = []int32{32, -32}
+	pb.F_Sfixed64RepeatedPacked = []int64{64, -64}
 
 	overify(t, pb,
 		"0807"+ // field 1, encoding 0, value 7
@@ -917,10 +872,17 @@
 			"aa0605"+"6279746573"+ // field 101, encoding 2 string "bytes"
 			"b0063f"+ // field 102, encoding 0, 0x3f zigzag32
 			"b8067f"+ // field 103, encoding 0, 0x7f zigzag64
+			"c506e0ffffff"+ // field 104, encoding 5, -32 fixed32
+			"c906c0ffffffffffffff"+ // field 105, encoding 1, -64 fixed64
 			"b21f02"+ // field 502, encoding 2, 2 bytes
 			"403f"+ // value 32, value -32
 			"ba1f03"+ // field 503, encoding 2, 3 bytes
-			"80017f") // value 64, value -64
+			"80017f"+ // value 64, value -64
+			"c21f08"+ // field 504, encoding 2, 8 bytes
+			"20000000e0ffffff"+ // value 32, value -32
+			"ca1f10"+ // field 505, encoding 2, 16 bytes
+			"4000000000000000c0ffffffffffffff") // value 64, value -64
+
 }
 
 // Test that we can encode empty bytes fields.
@@ -1167,13 +1129,10 @@
 		if pbd.Repeatedgroup[i] == nil { // TODO: more checking?
 			t.Error("pbd.Repeatedgroup bad")
 		}
-		var x uint64
-		x = uint64(pbd.F_Sint64Repeated[i])
-		if x != i {
+		if x := uint64(pbd.F_Sint64Repeated[i]); x != i {
 			t.Error("pbd.F_Sint64Repeated bad", x, i)
 		}
-		x = uint64(pbd.F_Sint32Repeated[i])
-		if x != i {
+		if x := uint64(pbd.F_Sint32Repeated[i]); x != i {
 			t.Error("pbd.F_Sint32Repeated bad", x, i)
 		}
 		s := fmt.Sprint(i)
@@ -1181,39 +1140,31 @@
 		if pbd.F_StringRepeated[i] != s {
 			t.Error("pbd.F_Sint32Repeated bad", pbd.F_StringRepeated[i], i)
 		}
-		x = uint64(pbd.F_DoubleRepeated[i])
-		if x != i {
+		if x := uint64(pbd.F_DoubleRepeated[i]); x != i {
 			t.Error("pbd.F_DoubleRepeated bad", x, i)
 		}
-		x = uint64(pbd.F_FloatRepeated[i])
-		if x != i {
+		if x := uint64(pbd.F_FloatRepeated[i]); x != i {
 			t.Error("pbd.F_FloatRepeated bad", x, i)
 		}
-		x = pbd.F_Uint64Repeated[i]
-		if x != i {
+		if x := pbd.F_Uint64Repeated[i]; x != i {
 			t.Error("pbd.F_Uint64Repeated bad", x, i)
 		}
-		x = uint64(pbd.F_Uint32Repeated[i])
-		if x != i {
+		if x := uint64(pbd.F_Uint32Repeated[i]); x != i {
 			t.Error("pbd.F_Uint32Repeated bad", x, i)
 		}
-		x = pbd.F_Fixed64Repeated[i]
-		if x != i {
+		if x := pbd.F_Fixed64Repeated[i]; x != i {
 			t.Error("pbd.F_Fixed64Repeated bad", x, i)
 		}
-		x = uint64(pbd.F_Fixed32Repeated[i])
-		if x != i {
+		if x := uint64(pbd.F_Fixed32Repeated[i]); x != i {
 			t.Error("pbd.F_Fixed32Repeated bad", x, i)
 		}
-		x = uint64(pbd.F_Int64Repeated[i])
-		if x != i {
+		if x := uint64(pbd.F_Int64Repeated[i]); x != i {
 			t.Error("pbd.F_Int64Repeated bad", x, i)
 		}
-		x = uint64(pbd.F_Int32Repeated[i])
-		if x != i {
+		if x := uint64(pbd.F_Int32Repeated[i]); x != i {
 			t.Error("pbd.F_Int32Repeated bad", x, i)
 		}
-		if pbd.F_BoolRepeated[i] != (i%2 == 0) {
+		if x := pbd.F_BoolRepeated[i]; x != (i%2 == 0) {
 			t.Error("pbd.F_BoolRepeated bad", x, i)
 		}
 		if pbd.RepeatedField[i] == nil { // TODO: more checking?
@@ -1222,21 +1173,25 @@
 	}
 }
 
-// Verify we give a useful message when decoding to the wrong structure type.
-func TestTypeMismatch(t *testing.T) {
-	pb1 := initGoTest(true)
+func TestBadWireTypeUnknown(t *testing.T) {
+	var b []byte
+	fmt.Sscanf("0a01780d00000000080b101612036161611521000000202c220362626225370000002203636363214200000000000000584d5a036464645900000000000056405d63000000", "%x", &b)
 
-	// Marshal
-	o := old()
-	o.Marshal(pb1)
+	m := new(MyMessage)
+	if err := Unmarshal(b, m); err != nil {
+		t.Errorf("unexpected Unmarshal error: %v", err)
+	}
 
-	// Now Unmarshal it to the wrong type.
-	pb2 := initGoTestField()
-	err := o.Unmarshal(pb2)
-	if err == nil {
-		t.Error("expected error, got no error")
-	} else if !strings.Contains(err.Error(), "bad wiretype") {
-		t.Error("expected bad wiretype error, got", err)
+	var unknown []byte
+	fmt.Sscanf("0a01780d0000000010161521000000202c2537000000214200000000000000584d5a036464645d63000000", "%x", &unknown)
+	if !bytes.Equal(m.XXX_unrecognized, unknown) {
+		t.Errorf("unknown bytes mismatch:\ngot  %x\nwant %x", m.XXX_unrecognized, unknown)
+	}
+	DiscardUnknown(m)
+
+	want := &MyMessage{Count: Int32(11), Name: String("aaa"), Pet: []string{"bbb", "ccc"}, Bigfloat: Float64(88)}
+	if !Equal(m, want) {
+		t.Errorf("message mismatch:\ngot  %v\nwant %v", m, want)
 	}
 }
 
@@ -1331,7 +1286,8 @@
 	err = Unmarshal(buf, pb)
 	if err == nil {
 		t.Error("unmarshal: expected error, got nil")
-	} else if _, ok := err.(*RequiredNotSetError); !ok || !strings.Contains(err.Error(), "{Unknown}") {
+	} else if _, ok := err.(*RequiredNotSetError); !ok || !strings.Contains(err.Error(), "Type") && !strings.Contains(err.Error(), "{Unknown}") {
+		// TODO: remove unknown cases once we commit to the new unmarshaler.
 		t.Errorf("unmarshal: bad error type: %v", err)
 	}
 }
@@ -1348,7 +1304,7 @@
 	buf := []byte{11, 12}
 	if err := Unmarshal(buf, pb); err == nil {
 		t.Error("unmarshal: expected error, got nil")
-	} else if _, ok := err.(*RequiredNotSetError); !ok || !strings.Contains(err.Error(), "Group.{Unknown}") {
+	} else if _, ok := err.(*RequiredNotSetError); !ok || !strings.Contains(err.Error(), "Group.Field") && !strings.Contains(err.Error(), "Group.{Unknown}") {
 		t.Errorf("unmarshal: bad error type: %v", err)
 	}
 }
@@ -1385,18 +1341,7 @@
 func (*NNIMessage) String() string { return "" }
 func (*NNIMessage) ProtoMessage()  {}
 
-// A type that implements the Marshaler interface and is nillable.
-type nillableMessage struct {
-	x uint64
-}
-
-func (nm *nillableMessage) Marshal() ([]byte, error) {
-	return EncodeVarint(nm.x), nil
-}
-
-type NMMessage struct {
-	nm *nillableMessage
-}
+type NMMessage struct{}
 
 func (*NMMessage) Reset()         {}
 func (*NMMessage) String() string { return "" }
@@ -1595,6 +1540,14 @@
 	}
 }
 
+func TestBytesWithInvalidLengthInGroup(t *testing.T) {
+	// Overflowing a 64-bit length should not be allowed.
+	b := []byte{0xbb, 0x30, 0xb2, 0x30, 0xb0, 0xb2, 0x83, 0xf1, 0xb0, 0xb2, 0xef, 0xbf, 0xbd, 0x01}
+	if err := Unmarshal(b, new(MyMessage)); err == nil {
+		t.Fatalf("Overflowed uint64 length without error")
+	}
+}
+
 func TestUnmarshalFuzz(t *testing.T) {
 	const N = 1000
 	seed := time.Now().UnixNano()
@@ -1668,6 +1621,28 @@
 	}
 }
 
+func TestExtensionMapFieldMarshalDeterministic(t *testing.T) {
+	m := &MyMessage{Count: Int(123)}
+	if err := SetExtension(m, E_Ext_More, &Ext{MapField: map[int32]int32{1: 1, 2: 2, 3: 3, 4: 4}}); err != nil {
+		t.Fatalf("SetExtension: %v", err)
+	}
+	marshal := func(m Message) []byte {
+		var b Buffer
+		b.SetDeterministic(true)
+		if err := b.Marshal(m); err != nil {
+			t.Fatalf("Marshal failed: %v", err)
+		}
+		return b.Bytes()
+	}
+
+	want := marshal(m)
+	for i := 0; i < 100; i++ {
+		if got := marshal(m); !bytes.Equal(got, want) {
+			t.Errorf("Marshal produced inconsistent output with determinism enabled (pass %d).\n got %v\nwant %v", i, got, want)
+		}
+	}
+}
+
 // Many extensions, because small maps might not iterate differently on each iteration.
 var exts = []*ExtensionDesc{
 	E_X201,
@@ -1802,6 +1777,43 @@
 	}
 }
 
+func TestUnmarshalMergesGroups(t *testing.T) {
+	// If a nested group occurs twice in the input,
+	// the fields should be merged when decoding.
+	a := &GroupNew{
+		G: &GroupNew_G{
+			X: Int32(7),
+			Y: Int32(8),
+		},
+	}
+	aData, err := Marshal(a)
+	if err != nil {
+		t.Fatalf("Marshal(a): %v", err)
+	}
+	b := &GroupNew{
+		G: &GroupNew_G{
+			X: Int32(9),
+		},
+	}
+	bData, err := Marshal(b)
+	if err != nil {
+		t.Fatalf("Marshal(b): %v", err)
+	}
+	want := &GroupNew{
+		G: &GroupNew_G{
+			X: Int32(9),
+			Y: Int32(8),
+		},
+	}
+	got := new(GroupNew)
+	if err := Unmarshal(append(aData, bData...), got); err != nil {
+		t.Fatalf("Unmarshal: %v", err)
+	}
+	if !Equal(got, want) {
+		t.Errorf("\n got %v\nwant %v", got, want)
+	}
+}
+
 func TestEncodingSizes(t *testing.T) {
 	tests := []struct {
 		m Message
@@ -1845,7 +1857,9 @@
 		"b404" + // field 70, encoding 4, end group
 		"aa0605" + "6279746573" + // field 101, encoding 2, string "bytes"
 		"b0063f" + // field 102, encoding 0, 0x3f zigzag32
-		"b8067f" // field 103, encoding 0, 0x7f zigzag64
+		"b8067f" + // field 103, encoding 0, 0x7f zigzag64
+		"c506e0ffffff" + // field 104, encoding 5, -32 fixed32
+		"c906c0ffffffffffffff" // field 105, encoding 1, -64 fixed64
 
 	o := old()
 	bytes, err := Marshal(pb)
@@ -1854,7 +1868,7 @@
 		o.DebugPrint("", bytes)
 		t.Fatalf("expected = %s", expected)
 	}
-	if strings.Index(err.Error(), "RequiredField.Label") < 0 {
+	if !strings.Contains(err.Error(), "RequiredField.Label") {
 		t.Errorf("marshal-1 wrong err msg: %v", err)
 	}
 	if !equal(bytes, expected, t) {
@@ -1870,7 +1884,7 @@
 		o.DebugPrint("", bytes)
 		t.Fatalf("string = %s", expected)
 	}
-	if strings.Index(err.Error(), "RequiredField.{Unknown}") < 0 {
+	if !strings.Contains(err.Error(), "RequiredField.Label") && !strings.Contains(err.Error(), "RequiredField.{Unknown}") {
 		t.Errorf("unmarshal wrong err msg: %v", err)
 	}
 	bytes, err = Marshal(pbd)
@@ -1879,7 +1893,7 @@
 		o.DebugPrint("", bytes)
 		t.Fatalf("string = %s", expected)
 	}
-	if strings.Index(err.Error(), "RequiredField.Label") < 0 {
+	if !strings.Contains(err.Error(), "RequiredField.Label") {
 		t.Errorf("marshal-2 wrong err msg: %v", err)
 	}
 	if !equal(bytes, expected, t) {
@@ -1888,6 +1902,25 @@
 	}
 }
 
+func TestRequiredNotSetErrorWithBadWireTypes(t *testing.T) {
+	// Required field expects a varint, and properly found a varint.
+	if err := Unmarshal([]byte{0x08, 0x00}, new(GoEnum)); err != nil {
+		t.Errorf("Unmarshal = %v, want nil", err)
+	}
+	// Required field expects a varint, but found a fixed32 instead.
+	if err := Unmarshal([]byte{0x0d, 0x00, 0x00, 0x00, 0x00}, new(GoEnum)); err == nil {
+		t.Errorf("Unmarshal = nil, want RequiredNotSetError")
+	}
+	// Required field expects a varint, and found both a varint and fixed32 (ignored).
+	m := new(GoEnum)
+	if err := Unmarshal([]byte{0x08, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x00}, m); err != nil {
+		t.Errorf("Unmarshal = %v, want nil", err)
+	}
+	if !bytes.Equal(m.XXX_unrecognized, []byte{0x0d, 0x00, 0x00, 0x00, 0x00}) {
+		t.Errorf("expected fixed32 to appear as unknown bytes: %x", m.XXX_unrecognized)
+	}
+}
+
 func fuzzUnmarshal(t *testing.T, data []byte) {
 	defer func() {
 		if e := recover(); e != nil {
@@ -1946,6 +1979,32 @@
 	(new(Buffer)).DebugPrint("Dump of b", b)
 }
 
+func TestMapFieldDeterministicMarshal(t *testing.T) {
+	m := &MessageWithMap{
+		NameMapping: map[int32]string{
+			1: "Rob",
+			4: "Ian",
+			8: "Dave",
+		},
+	}
+
+	marshal := func(m Message) []byte {
+		var b Buffer
+		b.SetDeterministic(true)
+		if err := b.Marshal(m); err != nil {
+			t.Fatalf("Marshal failed: %v", err)
+		}
+		return b.Bytes()
+	}
+
+	want := marshal(m)
+	for i := 0; i < 10; i++ {
+		if got := marshal(m); !bytes.Equal(got, want) {
+			t.Errorf("Marshal produced inconsistent output with determinism enabled (pass %d).\n got %v\nwant %v", i, got, want)
+		}
+	}
+}
+
 func TestMapFieldRoundTrips(t *testing.T) {
 	m := &MessageWithMap{
 		NameMapping: map[int32]string{
@@ -1954,7 +2013,7 @@
 			8: "Dave",
 		},
 		MsgMapping: map[int64]*FloatingPoint{
-			0x7001: &FloatingPoint{F: Float64(2.0)},
+			0x7001: {F: Float64(2.0)},
 		},
 		ByteMapping: map[bool][]byte{
 			false: []byte("that's not right!"),
@@ -1970,14 +2029,8 @@
 	if err := Unmarshal(b, m2); err != nil {
 		t.Fatalf("Unmarshal: %v", err)
 	}
-	for _, pair := range [][2]interface{}{
-		{m.NameMapping, m2.NameMapping},
-		{m.MsgMapping, m2.MsgMapping},
-		{m.ByteMapping, m2.ByteMapping},
-	} {
-		if !reflect.DeepEqual(pair[0], pair[1]) {
-			t.Errorf("Map did not survive a round trip.\ninitial: %v\n  final: %v", pair[0], pair[1])
-		}
+	if !Equal(m, m2) {
+		t.Errorf("Map did not survive a round trip.\ninitial: %v\n  final: %v", m, m2)
 	}
 }
 
@@ -2005,7 +2058,7 @@
 func TestMapFieldWithNilBytes(t *testing.T) {
 	m1 := &MessageWithMap{
 		ByteMapping: map[bool][]byte{
-			false: []byte{},
+			false: {},
 			true:  nil,
 		},
 	}
@@ -2119,6 +2172,22 @@
 	}
 }
 
+func TestOneofNilBytes(t *testing.T) {
+	// A oneof with nil byte slice should marshal to tag + 0 (size), with no error.
+	m := &Communique{Union: &Communique_Data{Data: nil}}
+	b, err := Marshal(m)
+	if err != nil {
+		t.Fatalf("Marshal failed: %v", err)
+	}
+	want := []byte{
+		7<<3 | 2, // tag 7, wire type 2
+		0,        // size
+	}
+	if !bytes.Equal(b, want) {
+		t.Errorf("Wrong result of Marshal: got %x, want %x", b, want)
+	}
+}
+
 func TestInefficientPackedBool(t *testing.T) {
 	// https://github.com/golang/protobuf/issues/76
 	inp := []byte{
@@ -2132,6 +2201,69 @@
 	}
 }
 
+// Make sure pure-reflect-based implementation handles
+// []int32-[]enum conversion correctly.
+func TestRepeatedEnum2(t *testing.T) {
+	pb := &RepeatedEnum{
+		Color: []RepeatedEnum_Color{RepeatedEnum_RED},
+	}
+	b, err := Marshal(pb)
+	if err != nil {
+		t.Fatalf("Marshal failed: %v", err)
+	}
+	x := new(RepeatedEnum)
+	err = Unmarshal(b, x)
+	if err != nil {
+		t.Fatalf("Unmarshal failed: %v", err)
+	}
+	if !Equal(pb, x) {
+		t.Errorf("Incorrect result: want: %v got: %v", pb, x)
+	}
+}
+
+// TestConcurrentMarshal makes sure that it is safe to marshal
+// same message in multiple goroutines concurrently.
+func TestConcurrentMarshal(t *testing.T) {
+	pb := initGoTest(true)
+	const N = 100
+	b := make([][]byte, N)
+
+	var wg sync.WaitGroup
+	for i := 0; i < N; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			var err error
+			b[i], err = Marshal(pb)
+			if err != nil {
+				t.Errorf("marshal error: %v", err)
+			}
+		}(i)
+	}
+
+	wg.Wait()
+	for i := 1; i < N; i++ {
+		if !bytes.Equal(b[0], b[i]) {
+			t.Errorf("concurrent marshal result not same: b[0] = %v, b[%d] = %v", b[0], i, b[i])
+		}
+	}
+}
+
+func TestInvalidUTF8(t *testing.T) {
+	const wire = "\x12\x04\xde\xea\xca\xfe"
+
+	var m GoTest
+	if err := Unmarshal([]byte(wire), &m); err == nil {
+		t.Errorf("Unmarshal error: got nil, want non-nil")
+	}
+
+	m.Reset()
+	m.Table = String(wire[2:])
+	if _, err := Marshal(&m); err == nil {
+		t.Errorf("Marshal error: got nil, want non-nil")
+	}
+}
+
 // Benchmarks
 
 func testMsg() *GoTest {
diff --git a/proto/any_test.go b/proto/any_test.go
index 1a3c22e..56fc97c 100644
--- a/proto/any_test.go
+++ b/proto/any_test.go
@@ -38,7 +38,7 @@
 	"github.com/golang/protobuf/proto"
 
 	pb "github.com/golang/protobuf/proto/proto3_proto"
-	testpb "github.com/golang/protobuf/proto/testdata"
+	testpb "github.com/golang/protobuf/proto/test_proto"
 	anypb "github.com/golang/protobuf/ptypes/any"
 )
 
@@ -166,33 +166,33 @@
 name: "David"
 result_count: 47
 anything: <
-  [type.googleapis.com/testdata.MyMessage]: <
+  [type.googleapis.com/test_proto.MyMessage]: <
     count: 47
     name: "David"
-    [testdata.Ext.more]: <
+    [test_proto.Ext.more]: <
       data: "foo"
     >
-    [testdata.Ext.text]: "bar"
+    [test_proto.Ext.text]: "bar"
   >
 >
 many_things: <
-  [type.googleapis.com/testdata.MyMessage]: <
+  [type.googleapis.com/test_proto.MyMessage]: <
     count: 42
     bikeshed: GREEN
     rep_bytes: "roboto"
-    [testdata.Ext.more]: <
+    [test_proto.Ext.more]: <
       data: "baz"
     >
   >
 >
 many_things: <
-  [type.googleapis.com/testdata.MyMessage]: <
+  [type.googleapis.com/test_proto.MyMessage]: <
     count: 47
     name: "David"
-    [testdata.Ext.more]: <
+    [test_proto.Ext.more]: <
       data: "foo"
     >
-    [testdata.Ext.text]: "bar"
+    [test_proto.Ext.text]: "bar"
   >
 >
 `
diff --git a/proto/clone.go b/proto/clone.go
index e392575..3cd3249 100644
--- a/proto/clone.go
+++ b/proto/clone.go
@@ -35,22 +35,39 @@
 package proto
 
 import (
+	"fmt"
 	"log"
 	"reflect"
 	"strings"
 )
 
 // Clone returns a deep copy of a protocol buffer.
-func Clone(pb Message) Message {
-	in := reflect.ValueOf(pb)
+func Clone(src Message) Message {
+	in := reflect.ValueOf(src)
 	if in.IsNil() {
-		return pb
+		return src
 	}
-
 	out := reflect.New(in.Type().Elem())
-	// out is empty so a merge is a deep copy.
-	mergeStruct(out.Elem(), in.Elem())
-	return out.Interface().(Message)
+	dst := out.Interface().(Message)
+	Merge(dst, src)
+	return dst
+}
+
+// Merger is the interface representing objects that can merge messages of the same type.
+type Merger interface {
+	// Merge merges src into this message.
+	// Required and optional fields that are set in src will be set to that value in dst.
+	// Elements of repeated fields will be appended.
+	//
+	// Merge may panic if called with a different argument type than the receiver.
+	Merge(src Message)
+}
+
+// generatedMerger is the custom merge method that generated protos will have.
+// We must add this method since a generate Merge method will conflict with
+// many existing protos that have a Merge data field already defined.
+type generatedMerger interface {
+	XXX_Merge(src Message)
 }
 
 // Merge merges src into dst.
@@ -58,17 +75,24 @@
 // Elements of repeated fields will be appended.
 // Merge panics if src and dst are not the same type, or if dst is nil.
 func Merge(dst, src Message) {
+	if m, ok := dst.(Merger); ok {
+		m.Merge(src)
+		return
+	}
+
 	in := reflect.ValueOf(src)
 	out := reflect.ValueOf(dst)
 	if out.IsNil() {
 		panic("proto: nil destination")
 	}
 	if in.Type() != out.Type() {
-		// Explicit test prior to mergeStruct so that mistyped nils will fail
-		panic("proto: type mismatch")
+		panic(fmt.Sprintf("proto.Merge(%T, %T) type mismatch", dst, src))
 	}
 	if in.IsNil() {
-		// Merging nil into non-nil is a quiet no-op
+		return // Merge from nil src is a noop
+	}
+	if m, ok := dst.(generatedMerger); ok {
+		m.XXX_Merge(src)
 		return
 	}
 	mergeStruct(out.Elem(), in.Elem())
@@ -84,7 +108,7 @@
 		mergeAny(out.Field(i), in.Field(i), false, sprop.Prop[i])
 	}
 
-	if emIn, ok := extendable(in.Addr().Interface()); ok {
+	if emIn, err := extendable(in.Addr().Interface()); err == nil {
 		emOut, _ := extendable(out.Addr().Interface())
 		mIn, muIn := emIn.extensionsRead()
 		if mIn != nil {
diff --git a/proto/clone_test.go b/proto/clone_test.go
index f607ff4..0d3b127 100644
--- a/proto/clone_test.go
+++ b/proto/clone_test.go
@@ -37,7 +37,7 @@
 	"github.com/golang/protobuf/proto"
 
 	proto3pb "github.com/golang/protobuf/proto/proto3_proto"
-	pb "github.com/golang/protobuf/proto/testdata"
+	pb "github.com/golang/protobuf/proto/test_proto"
 )
 
 var cloneTestMessage = &pb.MyMessage{
@@ -72,7 +72,7 @@
 func TestClone(t *testing.T) {
 	m := proto.Clone(cloneTestMessage).(*pb.MyMessage)
 	if !proto.Equal(m, cloneTestMessage) {
-		t.Errorf("Clone(%v) = %v", cloneTestMessage, m)
+		t.Fatalf("Clone(%v) = %v", cloneTestMessage, m)
 	}
 
 	// Verify it was a deep copy.
@@ -244,27 +244,45 @@
 			Data:       []byte("texas!"),
 		},
 	},
-	// Oneof fields should merge by assignment.
-	{
-		src: &pb.Communique{
-			Union: &pb.Communique_Number{41},
-		},
-		dst: &pb.Communique{
-			Union: &pb.Communique_Name{"Bobby Tables"},
-		},
-		want: &pb.Communique{
-			Union: &pb.Communique_Number{41},
-		},
+	{ // Oneof fields should merge by assignment.
+		src:  &pb.Communique{Union: &pb.Communique_Number{41}},
+		dst:  &pb.Communique{Union: &pb.Communique_Name{"Bobby Tables"}},
+		want: &pb.Communique{Union: &pb.Communique_Number{41}},
 	},
-	// Oneof nil is the same as not set.
+	{ // Oneof nil is the same as not set.
+		src:  &pb.Communique{},
+		dst:  &pb.Communique{Union: &pb.Communique_Name{"Bobby Tables"}},
+		want: &pb.Communique{Union: &pb.Communique_Name{"Bobby Tables"}},
+	},
 	{
-		src: &pb.Communique{},
-		dst: &pb.Communique{
-			Union: &pb.Communique_Name{"Bobby Tables"},
-		},
-		want: &pb.Communique{
-			Union: &pb.Communique_Name{"Bobby Tables"},
-		},
+		src:  &pb.Communique{Union: &pb.Communique_Number{1337}},
+		dst:  &pb.Communique{},
+		want: &pb.Communique{Union: &pb.Communique_Number{1337}},
+	},
+	{
+		src:  &pb.Communique{Union: &pb.Communique_Col{pb.MyMessage_RED}},
+		dst:  &pb.Communique{},
+		want: &pb.Communique{Union: &pb.Communique_Col{pb.MyMessage_RED}},
+	},
+	{
+		src:  &pb.Communique{Union: &pb.Communique_Data{[]byte("hello")}},
+		dst:  &pb.Communique{},
+		want: &pb.Communique{Union: &pb.Communique_Data{[]byte("hello")}},
+	},
+	{
+		src:  &pb.Communique{Union: &pb.Communique_Msg{&pb.Strings{BytesField: []byte{1, 2, 3}}}},
+		dst:  &pb.Communique{},
+		want: &pb.Communique{Union: &pb.Communique_Msg{&pb.Strings{BytesField: []byte{1, 2, 3}}}},
+	},
+	{
+		src:  &pb.Communique{Union: &pb.Communique_Msg{}},
+		dst:  &pb.Communique{},
+		want: &pb.Communique{Union: &pb.Communique_Msg{}},
+	},
+	{
+		src:  &pb.Communique{Union: &pb.Communique_Msg{&pb.Strings{StringField: proto.String("123")}}},
+		dst:  &pb.Communique{Union: &pb.Communique_Msg{&pb.Strings{BytesField: []byte{1, 2, 3}}}},
+		want: &pb.Communique{Union: &pb.Communique_Msg{&pb.Strings{StringField: proto.String("123"), BytesField: []byte{1, 2, 3}}}},
 	},
 	{
 		src: &proto3pb.Message{
@@ -287,14 +305,86 @@
 			},
 		},
 	},
+	{
+		src: &pb.GoTest{
+			F_BoolRepeated:   []bool{},
+			F_Int32Repeated:  []int32{},
+			F_Int64Repeated:  []int64{},
+			F_Uint32Repeated: []uint32{},
+			F_Uint64Repeated: []uint64{},
+			F_FloatRepeated:  []float32{},
+			F_DoubleRepeated: []float64{},
+			F_StringRepeated: []string{},
+			F_BytesRepeated:  [][]byte{},
+		},
+		dst: &pb.GoTest{},
+		want: &pb.GoTest{
+			F_BoolRepeated:   []bool{},
+			F_Int32Repeated:  []int32{},
+			F_Int64Repeated:  []int64{},
+			F_Uint32Repeated: []uint32{},
+			F_Uint64Repeated: []uint64{},
+			F_FloatRepeated:  []float32{},
+			F_DoubleRepeated: []float64{},
+			F_StringRepeated: []string{},
+			F_BytesRepeated:  [][]byte{},
+		},
+	},
+	{
+		src: &pb.GoTest{},
+		dst: &pb.GoTest{
+			F_BoolRepeated:   []bool{},
+			F_Int32Repeated:  []int32{},
+			F_Int64Repeated:  []int64{},
+			F_Uint32Repeated: []uint32{},
+			F_Uint64Repeated: []uint64{},
+			F_FloatRepeated:  []float32{},
+			F_DoubleRepeated: []float64{},
+			F_StringRepeated: []string{},
+			F_BytesRepeated:  [][]byte{},
+		},
+		want: &pb.GoTest{
+			F_BoolRepeated:   []bool{},
+			F_Int32Repeated:  []int32{},
+			F_Int64Repeated:  []int64{},
+			F_Uint32Repeated: []uint32{},
+			F_Uint64Repeated: []uint64{},
+			F_FloatRepeated:  []float32{},
+			F_DoubleRepeated: []float64{},
+			F_StringRepeated: []string{},
+			F_BytesRepeated:  [][]byte{},
+		},
+	},
+	{
+		src: &pb.GoTest{
+			F_BytesRepeated: [][]byte{nil, []byte{}, []byte{0}},
+		},
+		dst: &pb.GoTest{},
+		want: &pb.GoTest{
+			F_BytesRepeated: [][]byte{nil, []byte{}, []byte{0}},
+		},
+	},
+	{
+		src: &pb.MyMessage{
+			Others: []*pb.OtherMessage{},
+		},
+		dst: &pb.MyMessage{},
+		want: &pb.MyMessage{
+			Others: []*pb.OtherMessage{},
+		},
+	},
 }
 
 func TestMerge(t *testing.T) {
 	for _, m := range mergeTests {
 		got := proto.Clone(m.dst)
+		if !proto.Equal(got, m.dst) {
+			t.Errorf("Clone()\ngot  %v\nwant %v", got, m.dst)
+			continue
+		}
 		proto.Merge(got, m.src)
 		if !proto.Equal(got, m.want) {
-			t.Errorf("Merge(%v, %v)\n got %v\nwant %v\n", m.dst, m.src, got, m.want)
+			t.Errorf("Merge(%v, %v)\ngot  %v\nwant %v", m.dst, m.src, got, m.want)
 		}
 	}
 }
diff --git a/proto/decode.go b/proto/decode.go
index aa20729..d9aa3c4 100644
--- a/proto/decode.go
+++ b/proto/decode.go
@@ -39,8 +39,6 @@
 	"errors"
 	"fmt"
 	"io"
-	"os"
-	"reflect"
 )
 
 // errOverflow is returned when an integer is too large to be represented.
@@ -50,10 +48,6 @@
 // wire type is encountered. It does not get returned to user code.
 var ErrInternalBadWireType = errors.New("proto: internal error: bad wiretype for oneof")
 
-// The fundamental decoders that interpret bytes on the wire.
-// Those that take integer types all return uint64 and are
-// therefore of type valueDecoder.
-
 // DecodeVarint reads a varint-encoded integer from the slice.
 // It returns the integer and the number of bytes consumed, or
 // zero if there is not enough.
@@ -267,9 +261,6 @@
 	return
 }
 
-// These are not ValueDecoders: they produce an array of bytes or a string.
-// bytes, embedded messages
-
 // DecodeRawBytes reads a count-delimited byte buffer from the Buffer.
 // This is the format used for the bytes protocol buffer
 // type and for embedded messages.
@@ -311,81 +302,29 @@
 	return string(buf), nil
 }
 
-// Skip the next item in the buffer. Its wire type is decoded and presented as an argument.
-// If the protocol buffer has extensions, and the field matches, add it as an extension.
-// Otherwise, if the XXX_unrecognized field exists, append the skipped data there.
-func (o *Buffer) skipAndSave(t reflect.Type, tag, wire int, base structPointer, unrecField field) error {
-	oi := o.index
-
-	err := o.skip(t, tag, wire)
-	if err != nil {
-		return err
-	}
-
-	if !unrecField.IsValid() {
-		return nil
-	}
-
-	ptr := structPointer_Bytes(base, unrecField)
-
-	// Add the skipped field to struct field
-	obuf := o.buf
-
-	o.buf = *ptr
-	o.EncodeVarint(uint64(tag<<3 | wire))
-	*ptr = append(o.buf, obuf[oi:o.index]...)
-
-	o.buf = obuf
-
-	return nil
-}
-
-// Skip the next item in the buffer. Its wire type is decoded and presented as an argument.
-func (o *Buffer) skip(t reflect.Type, tag, wire int) error {
-
-	var u uint64
-	var err error
-
-	switch wire {
-	case WireVarint:
-		_, err = o.DecodeVarint()
-	case WireFixed64:
-		_, err = o.DecodeFixed64()
-	case WireBytes:
-		_, err = o.DecodeRawBytes(false)
-	case WireFixed32:
-		_, err = o.DecodeFixed32()
-	case WireStartGroup:
-		for {
-			u, err = o.DecodeVarint()
-			if err != nil {
-				break
-			}
-			fwire := int(u & 0x7)
-			if fwire == WireEndGroup {
-				break
-			}
-			ftag := int(u >> 3)
-			err = o.skip(t, ftag, fwire)
-			if err != nil {
-				break
-			}
-		}
-	default:
-		err = fmt.Errorf("proto: can't skip unknown wire type %d for %s", wire, t)
-	}
-	return err
-}
-
 // Unmarshaler is the interface representing objects that can
-// unmarshal themselves.  The method should reset the receiver before
-// decoding starts.  The argument points to data that may be
+// unmarshal themselves.  The argument points to data that may be
 // overwritten, so implementations should not keep references to the
 // buffer.
+// Unmarshal implementations should not clear the receiver.
+// Any unmarshaled data should be merged into the receiver.
+// Callers of Unmarshal that do not want to retain existing data
+// should Reset the receiver before calling Unmarshal.
 type Unmarshaler interface {
 	Unmarshal([]byte) error
 }
 
+// newUnmarshaler is the interface representing objects that can
+// unmarshal themselves. The semantics are identical to Unmarshaler.
+//
+// This exists to support protoc-gen-go generated messages.
+// The proto package will stop type-asserting to this interface in the future.
+//
+// DO NOT DEPEND ON THIS.
+type newUnmarshaler interface {
+	XXX_Unmarshal([]byte) error
+}
+
 // Unmarshal parses the protocol buffer representation in buf and places the
 // decoded result in pb.  If the struct underlying pb does not match
 // the data in buf, the results can be unpredictable.
@@ -395,7 +334,13 @@
 // to preserve and append to existing data.
 func Unmarshal(buf []byte, pb Message) error {
 	pb.Reset()
-	return UnmarshalMerge(buf, pb)
+	if u, ok := pb.(newUnmarshaler); ok {
+		return u.XXX_Unmarshal(buf)
+	}
+	if u, ok := pb.(Unmarshaler); ok {
+		return u.Unmarshal(buf)
+	}
+	return NewBuffer(buf).Unmarshal(pb)
 }
 
 // UnmarshalMerge parses the protocol buffer representation in buf and
@@ -405,8 +350,16 @@
 // UnmarshalMerge merges into existing data in pb.
 // Most code should use Unmarshal instead.
 func UnmarshalMerge(buf []byte, pb Message) error {
-	// If the object can unmarshal itself, let it.
+	if u, ok := pb.(newUnmarshaler); ok {
+		return u.XXX_Unmarshal(buf)
+	}
 	if u, ok := pb.(Unmarshaler); ok {
+		// NOTE: The history of proto have unfortunately been inconsistent
+		// whether Unmarshaler should or should not implicitly clear itself.
+		// Some implementations do, most do not.
+		// Thus, calling this here may or may not do what people want.
+		//
+		// See https://github.com/golang/protobuf/issues/424
 		return u.Unmarshal(buf)
 	}
 	return NewBuffer(buf).Unmarshal(pb)
@@ -422,12 +375,17 @@
 }
 
 // DecodeGroup reads a tag-delimited group from the Buffer.
+// StartGroup tag is already consumed. This function consumes
+// EndGroup tag.
 func (p *Buffer) DecodeGroup(pb Message) error {
-	typ, base, err := getbase(pb)
-	if err != nil {
-		return err
+	b := p.buf[p.index:]
+	x, y := findEndGroup(b)
+	if x < 0 {
+		return io.ErrUnexpectedEOF
 	}
-	return p.unmarshalType(typ.Elem(), GetProperties(typ.Elem()), true, base)
+	err := Unmarshal(b[:x], pb)
+	p.index += y
+	return err
 }
 
 // Unmarshal parses the protocol buffer representation in the
@@ -438,533 +396,33 @@
 // Unlike proto.Unmarshal, this does not reset pb before starting to unmarshal.
 func (p *Buffer) Unmarshal(pb Message) error {
 	// If the object can unmarshal itself, let it.
+	if u, ok := pb.(newUnmarshaler); ok {
+		err := u.XXX_Unmarshal(p.buf[p.index:])
+		p.index = len(p.buf)
+		return err
+	}
 	if u, ok := pb.(Unmarshaler); ok {
+		// NOTE: The history of proto have unfortunately been inconsistent
+		// whether Unmarshaler should or should not implicitly clear itself.
+		// Some implementations do, most do not.
+		// Thus, calling this here may or may not do what people want.
+		//
+		// See https://github.com/golang/protobuf/issues/424
 		err := u.Unmarshal(p.buf[p.index:])
 		p.index = len(p.buf)
 		return err
 	}
 
-	typ, base, err := getbase(pb)
-	if err != nil {
-		return err
-	}
-
-	err = p.unmarshalType(typ.Elem(), GetProperties(typ.Elem()), false, base)
-
-	if collectStats {
-		stats.Decode++
-	}
-
-	return err
-}
-
-// unmarshalType does the work of unmarshaling a structure.
-func (o *Buffer) unmarshalType(st reflect.Type, prop *StructProperties, is_group bool, base structPointer) error {
-	var state errorState
-	required, reqFields := prop.reqCount, uint64(0)
-
-	var err error
-	for err == nil && o.index < len(o.buf) {
-		oi := o.index
-		var u uint64
-		u, err = o.DecodeVarint()
-		if err != nil {
-			break
-		}
-		wire := int(u & 0x7)
-		if wire == WireEndGroup {
-			if is_group {
-				if required > 0 {
-					// Not enough information to determine the exact field.
-					// (See below.)
-					return &RequiredNotSetError{"{Unknown}"}
-				}
-				return nil // input is satisfied
-			}
-			return fmt.Errorf("proto: %s: wiretype end group for non-group", st)
-		}
-		tag := int(u >> 3)
-		if tag <= 0 {
-			return fmt.Errorf("proto: %s: illegal tag %d (wire type %d)", st, tag, wire)
-		}
-		fieldnum, ok := prop.decoderTags.get(tag)
-		if !ok {
-			// Maybe it's an extension?
-			if prop.extendable {
-				if e, _ := extendable(structPointer_Interface(base, st)); isExtensionField(e, int32(tag)) {
-					if err = o.skip(st, tag, wire); err == nil {
-						extmap := e.extensionsWrite()
-						ext := extmap[int32(tag)] // may be missing
-						ext.enc = append(ext.enc, o.buf[oi:o.index]...)
-						extmap[int32(tag)] = ext
-					}
-					continue
-				}
-			}
-			// Maybe it's a oneof?
-			if prop.oneofUnmarshaler != nil {
-				m := structPointer_Interface(base, st).(Message)
-				// First return value indicates whether tag is a oneof field.
-				ok, err = prop.oneofUnmarshaler(m, tag, wire, o)
-				if err == ErrInternalBadWireType {
-					// Map the error to something more descriptive.
-					// Do the formatting here to save generated code space.
-					err = fmt.Errorf("bad wiretype for oneof field in %T", m)
-				}
-				if ok {
-					continue
-				}
-			}
-			err = o.skipAndSave(st, tag, wire, base, prop.unrecField)
-			continue
-		}
-		p := prop.Prop[fieldnum]
-
-		if p.dec == nil {
-			fmt.Fprintf(os.Stderr, "proto: no protobuf decoder for %s.%s\n", st, st.Field(fieldnum).Name)
-			continue
-		}
-		dec := p.dec
-		if wire != WireStartGroup && wire != p.WireType {
-			if wire == WireBytes && p.packedDec != nil {
-				// a packable field
-				dec = p.packedDec
-			} else {
-				err = fmt.Errorf("proto: bad wiretype for field %s.%s: got wiretype %d, want %d", st, st.Field(fieldnum).Name, wire, p.WireType)
-				continue
-			}
-		}
-		decErr := dec(o, p, base)
-		if decErr != nil && !state.shouldContinue(decErr, p) {
-			err = decErr
-		}
-		if err == nil && p.Required {
-			// Successfully decoded a required field.
-			if tag <= 64 {
-				// use bitmap for fields 1-64 to catch field reuse.
-				var mask uint64 = 1 << uint64(tag-1)
-				if reqFields&mask == 0 {
-					// new required field
-					reqFields |= mask
-					required--
-				}
-			} else {
-				// This is imprecise. It can be fooled by a required field
-				// with a tag > 64 that is encoded twice; that's very rare.
-				// A fully correct implementation would require allocating
-				// a data structure, which we would like to avoid.
-				required--
-			}
-		}
-	}
-	if err == nil {
-		if is_group {
-			return io.ErrUnexpectedEOF
-		}
-		if state.err != nil {
-			return state.err
-		}
-		if required > 0 {
-			// Not enough information to determine the exact field. If we use extra
-			// CPU, we could determine the field only if the missing required field
-			// has a tag <= 64 and we check reqFields.
-			return &RequiredNotSetError{"{Unknown}"}
-		}
-	}
-	return err
-}
-
-// Individual type decoders
-// For each,
-//	u is the decoded value,
-//	v is a pointer to the field (pointer) in the struct
-
-// Sizes of the pools to allocate inside the Buffer.
-// The goal is modest amortization and allocation
-// on at least 16-byte boundaries.
-const (
-	boolPoolSize   = 16
-	uint32PoolSize = 8
-	uint64PoolSize = 4
-)
-
-// Decode a bool.
-func (o *Buffer) dec_bool(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	if len(o.bools) == 0 {
-		o.bools = make([]bool, boolPoolSize)
-	}
-	o.bools[0] = u != 0
-	*structPointer_Bool(base, p.field) = &o.bools[0]
-	o.bools = o.bools[1:]
-	return nil
-}
-
-func (o *Buffer) dec_proto3_bool(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	*structPointer_BoolVal(base, p.field) = u != 0
-	return nil
-}
-
-// Decode an int32.
-func (o *Buffer) dec_int32(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	word32_Set(structPointer_Word32(base, p.field), o, uint32(u))
-	return nil
-}
-
-func (o *Buffer) dec_proto3_int32(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	word32Val_Set(structPointer_Word32Val(base, p.field), uint32(u))
-	return nil
-}
-
-// Decode an int64.
-func (o *Buffer) dec_int64(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	word64_Set(structPointer_Word64(base, p.field), o, u)
-	return nil
-}
-
-func (o *Buffer) dec_proto3_int64(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	word64Val_Set(structPointer_Word64Val(base, p.field), o, u)
-	return nil
-}
-
-// Decode a string.
-func (o *Buffer) dec_string(p *Properties, base structPointer) error {
-	s, err := o.DecodeStringBytes()
-	if err != nil {
-		return err
-	}
-	*structPointer_String(base, p.field) = &s
-	return nil
-}
-
-func (o *Buffer) dec_proto3_string(p *Properties, base structPointer) error {
-	s, err := o.DecodeStringBytes()
-	if err != nil {
-		return err
-	}
-	*structPointer_StringVal(base, p.field) = s
-	return nil
-}
-
-// Decode a slice of bytes ([]byte).
-func (o *Buffer) dec_slice_byte(p *Properties, base structPointer) error {
-	b, err := o.DecodeRawBytes(true)
-	if err != nil {
-		return err
-	}
-	*structPointer_Bytes(base, p.field) = b
-	return nil
-}
-
-// Decode a slice of bools ([]bool).
-func (o *Buffer) dec_slice_bool(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	v := structPointer_BoolSlice(base, p.field)
-	*v = append(*v, u != 0)
-	return nil
-}
-
-// Decode a slice of bools ([]bool) in packed format.
-func (o *Buffer) dec_slice_packed_bool(p *Properties, base structPointer) error {
-	v := structPointer_BoolSlice(base, p.field)
-
-	nn, err := o.DecodeVarint()
-	if err != nil {
-		return err
-	}
-	nb := int(nn) // number of bytes of encoded bools
-	fin := o.index + nb
-	if fin < o.index {
-		return errOverflow
-	}
-
-	y := *v
-	for o.index < fin {
-		u, err := p.valDec(o)
-		if err != nil {
-			return err
-		}
-		y = append(y, u != 0)
-	}
-
-	*v = y
-	return nil
-}
-
-// Decode a slice of int32s ([]int32).
-func (o *Buffer) dec_slice_int32(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-	structPointer_Word32Slice(base, p.field).Append(uint32(u))
-	return nil
-}
-
-// Decode a slice of int32s ([]int32) in packed format.
-func (o *Buffer) dec_slice_packed_int32(p *Properties, base structPointer) error {
-	v := structPointer_Word32Slice(base, p.field)
-
-	nn, err := o.DecodeVarint()
-	if err != nil {
-		return err
-	}
-	nb := int(nn) // number of bytes of encoded int32s
-
-	fin := o.index + nb
-	if fin < o.index {
-		return errOverflow
-	}
-	for o.index < fin {
-		u, err := p.valDec(o)
-		if err != nil {
-			return err
-		}
-		v.Append(uint32(u))
-	}
-	return nil
-}
-
-// Decode a slice of int64s ([]int64).
-func (o *Buffer) dec_slice_int64(p *Properties, base structPointer) error {
-	u, err := p.valDec(o)
-	if err != nil {
-		return err
-	}
-
-	structPointer_Word64Slice(base, p.field).Append(u)
-	return nil
-}
-
-// Decode a slice of int64s ([]int64) in packed format.
-func (o *Buffer) dec_slice_packed_int64(p *Properties, base structPointer) error {
-	v := structPointer_Word64Slice(base, p.field)
-
-	nn, err := o.DecodeVarint()
-	if err != nil {
-		return err
-	}
-	nb := int(nn) // number of bytes of encoded int64s
-
-	fin := o.index + nb
-	if fin < o.index {
-		return errOverflow
-	}
-	for o.index < fin {
-		u, err := p.valDec(o)
-		if err != nil {
-			return err
-		}
-		v.Append(u)
-	}
-	return nil
-}
-
-// Decode a slice of strings ([]string).
-func (o *Buffer) dec_slice_string(p *Properties, base structPointer) error {
-	s, err := o.DecodeStringBytes()
-	if err != nil {
-		return err
-	}
-	v := structPointer_StringSlice(base, p.field)
-	*v = append(*v, s)
-	return nil
-}
-
-// Decode a slice of slice of bytes ([][]byte).
-func (o *Buffer) dec_slice_slice_byte(p *Properties, base structPointer) error {
-	b, err := o.DecodeRawBytes(true)
-	if err != nil {
-		return err
-	}
-	v := structPointer_BytesSlice(base, p.field)
-	*v = append(*v, b)
-	return nil
-}
-
-// Decode a map field.
-func (o *Buffer) dec_new_map(p *Properties, base structPointer) error {
-	raw, err := o.DecodeRawBytes(false)
-	if err != nil {
-		return err
-	}
-	oi := o.index       // index at the end of this map entry
-	o.index -= len(raw) // move buffer back to start of map entry
-
-	mptr := structPointer_NewAt(base, p.field, p.mtype) // *map[K]V
-	if mptr.Elem().IsNil() {
-		mptr.Elem().Set(reflect.MakeMap(mptr.Type().Elem()))
-	}
-	v := mptr.Elem() // map[K]V
-
-	// Prepare addressable doubly-indirect placeholders for the key and value types.
-	// See enc_new_map for why.
-	keyptr := reflect.New(reflect.PtrTo(p.mtype.Key())).Elem() // addressable *K
-	keybase := toStructPointer(keyptr.Addr())                  // **K
-
-	var valbase structPointer
-	var valptr reflect.Value
-	switch p.mtype.Elem().Kind() {
-	case reflect.Slice:
-		// []byte
-		var dummy []byte
-		valptr = reflect.ValueOf(&dummy)  // *[]byte
-		valbase = toStructPointer(valptr) // *[]byte
-	case reflect.Ptr:
-		// message; valptr is **Msg; need to allocate the intermediate pointer
-		valptr = reflect.New(reflect.PtrTo(p.mtype.Elem())).Elem() // addressable *V
-		valptr.Set(reflect.New(valptr.Type().Elem()))
-		valbase = toStructPointer(valptr)
-	default:
-		// everything else
-		valptr = reflect.New(reflect.PtrTo(p.mtype.Elem())).Elem() // addressable *V
-		valbase = toStructPointer(valptr.Addr())                   // **V
-	}
-
-	// Decode.
-	// This parses a restricted wire format, namely the encoding of a message
-	// with two fields. See enc_new_map for the format.
-	for o.index < oi {
-		// tagcode for key and value properties are always a single byte
-		// because they have tags 1 and 2.
-		tagcode := o.buf[o.index]
-		o.index++
-		switch tagcode {
-		case p.mkeyprop.tagcode[0]:
-			if err := p.mkeyprop.dec(o, p.mkeyprop, keybase); err != nil {
-				return err
-			}
-		case p.mvalprop.tagcode[0]:
-			if err := p.mvalprop.dec(o, p.mvalprop, valbase); err != nil {
-				return err
-			}
-		default:
-			// TODO: Should we silently skip this instead?
-			return fmt.Errorf("proto: bad map data tag %d", raw[0])
-		}
-	}
-	keyelem, valelem := keyptr.Elem(), valptr.Elem()
-	if !keyelem.IsValid() {
-		keyelem = reflect.Zero(p.mtype.Key())
-	}
-	if !valelem.IsValid() {
-		valelem = reflect.Zero(p.mtype.Elem())
-	}
-
-	v.SetMapIndex(keyelem, valelem)
-	return nil
-}
-
-// Decode a group.
-func (o *Buffer) dec_struct_group(p *Properties, base structPointer) error {
-	bas := structPointer_GetStructPointer(base, p.field)
-	if structPointer_IsNil(bas) {
-		// allocate new nested message
-		bas = toStructPointer(reflect.New(p.stype))
-		structPointer_SetStructPointer(base, p.field, bas)
-	}
-	return o.unmarshalType(p.stype, p.sprop, true, bas)
-}
-
-// Decode an embedded message.
-func (o *Buffer) dec_struct_message(p *Properties, base structPointer) (err error) {
-	raw, e := o.DecodeRawBytes(false)
-	if e != nil {
-		return e
-	}
-
-	bas := structPointer_GetStructPointer(base, p.field)
-	if structPointer_IsNil(bas) {
-		// allocate new nested message
-		bas = toStructPointer(reflect.New(p.stype))
-		structPointer_SetStructPointer(base, p.field, bas)
-	}
-
-	// If the object can unmarshal itself, let it.
-	if p.isUnmarshaler {
-		iv := structPointer_Interface(bas, p.stype)
-		return iv.(Unmarshaler).Unmarshal(raw)
-	}
-
-	obuf := o.buf
-	oi := o.index
-	o.buf = raw
-	o.index = 0
-
-	err = o.unmarshalType(p.stype, p.sprop, false, bas)
-	o.buf = obuf
-	o.index = oi
-
-	return err
-}
-
-// Decode a slice of embedded messages.
-func (o *Buffer) dec_slice_struct_message(p *Properties, base structPointer) error {
-	return o.dec_slice_struct(p, false, base)
-}
-
-// Decode a slice of embedded groups.
-func (o *Buffer) dec_slice_struct_group(p *Properties, base structPointer) error {
-	return o.dec_slice_struct(p, true, base)
-}
-
-// Decode a slice of structs ([]*struct).
-func (o *Buffer) dec_slice_struct(p *Properties, is_group bool, base structPointer) error {
-	v := reflect.New(p.stype)
-	bas := toStructPointer(v)
-	structPointer_StructPointerSlice(base, p.field).Append(bas)
-
-	if is_group {
-		err := o.unmarshalType(p.stype, p.sprop, is_group, bas)
-		return err
-	}
-
-	raw, err := o.DecodeRawBytes(false)
-	if err != nil {
-		return err
-	}
-
-	// If the object can unmarshal itself, let it.
-	if p.isUnmarshaler {
-		iv := v.Interface()
-		return iv.(Unmarshaler).Unmarshal(raw)
-	}
-
-	obuf := o.buf
-	oi := o.index
-	o.buf = raw
-	o.index = 0
-
-	err = o.unmarshalType(p.stype, p.sprop, is_group, bas)
-
-	o.buf = obuf
-	o.index = oi
-
+	// Slow workaround for messages that aren't Unmarshalers.
+	// This includes some hand-coded .pb.go files and
+	// bootstrap protos.
+	// TODO: fix all of those and then add Unmarshal to
+	// the Message interface. Then:
+	// The cast above and code below can be deleted.
+	// The old unmarshaler can be deleted.
+	// Clients can call Unmarshal directly (can already do that, actually).
+	var info InternalMessageInfo
+	err := info.Unmarshal(pb, p.buf[p.index:])
+	p.index = len(p.buf)
 	return err
 }
diff --git a/proto/decode_test.go b/proto/decode_test.go
index 2c4c31d..949be3a 100644
--- a/proto/decode_test.go
+++ b/proto/decode_test.go
@@ -41,10 +41,7 @@
 	tpb "github.com/golang/protobuf/proto/proto3_proto"
 )
 
-var (
-	bytesBlackhole []byte
-	msgBlackhole   = new(tpb.Message)
-)
+var msgBlackhole = new(tpb.Message)
 
 // BenchmarkVarint32ArraySmall shows the performance on an array of small int32 fields (1 and
 // 2 bytes long).
diff --git a/proto/discard.go b/proto/discard.go
index bd0e3bb..dea2617 100644
--- a/proto/discard.go
+++ b/proto/discard.go
@@ -35,8 +35,14 @@
 	"fmt"
 	"reflect"
 	"strings"
+	"sync"
+	"sync/atomic"
 )
 
+type generatedDiscarder interface {
+	XXX_DiscardUnknown()
+}
+
 // DiscardUnknown recursively discards all unknown fields from this message
 // and all embedded messages.
 //
@@ -49,9 +55,202 @@
 // For proto2 messages, the unknown fields of message extensions are only
 // discarded from messages that have been accessed via GetExtension.
 func DiscardUnknown(m Message) {
+	if m, ok := m.(generatedDiscarder); ok {
+		m.XXX_DiscardUnknown()
+		return
+	}
+	// TODO: Dynamically populate a InternalMessageInfo for legacy messages,
+	// but the master branch has no implementation for InternalMessageInfo,
+	// so it would be more work to replicate that approach.
 	discardLegacy(m)
 }
 
+// DiscardUnknown recursively discards all unknown fields.
+func (a *InternalMessageInfo) DiscardUnknown(m Message) {
+	di := atomicLoadDiscardInfo(&a.discard)
+	if di == nil {
+		di = getDiscardInfo(reflect.TypeOf(m).Elem())
+		atomicStoreDiscardInfo(&a.discard, di)
+	}
+	di.discard(toPointer(&m))
+}
+
+type discardInfo struct {
+	typ reflect.Type
+
+	initialized int32 // 0: only typ is valid, 1: everything is valid
+	lock        sync.Mutex
+
+	fields       []discardFieldInfo
+	unrecognized field
+}
+
+type discardFieldInfo struct {
+	field   field // Offset of field, guaranteed to be valid
+	discard func(src pointer)
+}
+
+var (
+	discardInfoMap  = map[reflect.Type]*discardInfo{}
+	discardInfoLock sync.Mutex
+)
+
+func getDiscardInfo(t reflect.Type) *discardInfo {
+	discardInfoLock.Lock()
+	defer discardInfoLock.Unlock()
+	di := discardInfoMap[t]
+	if di == nil {
+		di = &discardInfo{typ: t}
+		discardInfoMap[t] = di
+	}
+	return di
+}
+
+func (di *discardInfo) discard(src pointer) {
+	if src.isNil() {
+		return // Nothing to do.
+	}
+
+	if atomic.LoadInt32(&di.initialized) == 0 {
+		di.computeDiscardInfo()
+	}
+
+	for _, fi := range di.fields {
+		sfp := src.offset(fi.field)
+		fi.discard(sfp)
+	}
+
+	// For proto2 messages, only discard unknown fields in message extensions
+	// that have been accessed via GetExtension.
+	if em, err := extendable(src.asPointerTo(di.typ).Interface()); err == nil {
+		// Ignore lock since DiscardUnknown is not concurrency safe.
+		emm, _ := em.extensionsRead()
+		for _, mx := range emm {
+			if m, ok := mx.value.(Message); ok {
+				DiscardUnknown(m)
+			}
+		}
+	}
+
+	if di.unrecognized.IsValid() {
+		*src.offset(di.unrecognized).toBytes() = nil
+	}
+}
+
+func (di *discardInfo) computeDiscardInfo() {
+	di.lock.Lock()
+	defer di.lock.Unlock()
+	if di.initialized != 0 {
+		return
+	}
+	t := di.typ
+	n := t.NumField()
+
+	for i := 0; i < n; i++ {
+		f := t.Field(i)
+		if strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+
+		dfi := discardFieldInfo{field: toField(&f)}
+		tf := f.Type
+
+		// Unwrap tf to get its most basic type.
+		var isPointer, isSlice bool
+		if tf.Kind() == reflect.Slice && tf.Elem().Kind() != reflect.Uint8 {
+			isSlice = true
+			tf = tf.Elem()
+		}
+		if tf.Kind() == reflect.Ptr {
+			isPointer = true
+			tf = tf.Elem()
+		}
+		if isPointer && isSlice && tf.Kind() != reflect.Struct {
+			panic(fmt.Sprintf("%v.%s cannot be a slice of pointers to primitive types", t, f.Name))
+		}
+
+		switch tf.Kind() {
+		case reflect.Struct:
+			switch {
+			case !isPointer:
+				panic(fmt.Sprintf("%v.%s cannot be a direct struct value", t, f.Name))
+			case isSlice: // E.g., []*pb.T
+				di := getDiscardInfo(tf)
+				dfi.discard = func(src pointer) {
+					sps := src.getPointerSlice()
+					for _, sp := range sps {
+						if !sp.isNil() {
+							di.discard(sp)
+						}
+					}
+				}
+			default: // E.g., *pb.T
+				di := getDiscardInfo(tf)
+				dfi.discard = func(src pointer) {
+					sp := src.getPointer()
+					if !sp.isNil() {
+						di.discard(sp)
+					}
+				}
+			}
+		case reflect.Map:
+			switch {
+			case isPointer || isSlice:
+				panic(fmt.Sprintf("%v.%s cannot be a pointer to a map or a slice of map values", t, f.Name))
+			default: // E.g., map[K]V
+				if tf.Elem().Kind() == reflect.Ptr { // Proto struct (e.g., *T)
+					dfi.discard = func(src pointer) {
+						sm := src.asPointerTo(tf).Elem()
+						if sm.Len() == 0 {
+							return
+						}
+						for _, key := range sm.MapKeys() {
+							val := sm.MapIndex(key)
+							DiscardUnknown(val.Interface().(Message))
+						}
+					}
+				} else {
+					dfi.discard = func(pointer) {} // Noop
+				}
+			}
+		case reflect.Interface:
+			// Must be oneof field.
+			switch {
+			case isPointer || isSlice:
+				panic(fmt.Sprintf("%v.%s cannot be a pointer to a interface or a slice of interface values", t, f.Name))
+			default: // E.g., interface{}
+				// TODO: Make this faster?
+				dfi.discard = func(src pointer) {
+					su := src.asPointerTo(tf).Elem()
+					if !su.IsNil() {
+						sv := su.Elem().Elem().Field(0)
+						if sv.Kind() == reflect.Ptr && sv.IsNil() {
+							return
+						}
+						switch sv.Type().Kind() {
+						case reflect.Ptr: // Proto struct (e.g., *T)
+							DiscardUnknown(sv.Interface().(Message))
+						}
+					}
+				}
+			}
+		default:
+			continue
+		}
+		di.fields = append(di.fields, dfi)
+	}
+
+	di.unrecognized = invalidField
+	if f, ok := t.FieldByName("XXX_unrecognized"); ok {
+		if f.Type != reflect.TypeOf([]byte{}) {
+			panic("expected XXX_unrecognized to be of type []byte")
+		}
+		di.unrecognized = toField(&f)
+	}
+
+	atomic.StoreInt32(&di.initialized, 1)
+}
+
 func discardLegacy(m Message) {
 	v := reflect.ValueOf(m)
 	if v.Kind() != reflect.Ptr || v.IsNil() {
@@ -139,7 +338,7 @@
 
 	// For proto2 messages, only discard unknown fields in message extensions
 	// that have been accessed via GetExtension.
-	if em, ok := extendable(m); ok {
+	if em, err := extendable(m); err == nil {
 		// Ignore lock since discardLegacy is not concurrency safe.
 		emm, _ := em.extensionsRead()
 		for _, mx := range emm {
diff --git a/proto/discard_test.go b/proto/discard_test.go
new file mode 100644
index 0000000..a2ff550
--- /dev/null
+++ b/proto/discard_test.go
@@ -0,0 +1,170 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2017 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto_test
+
+import (
+	"testing"
+
+	"github.com/golang/protobuf/proto"
+
+	proto3pb "github.com/golang/protobuf/proto/proto3_proto"
+	pb "github.com/golang/protobuf/proto/test_proto"
+)
+
+func TestDiscardUnknown(t *testing.T) {
+	tests := []struct {
+		desc     string
+		in, want proto.Message
+	}{{
+		desc: "Nil",
+		in:   nil, want: nil, // Should not panic
+	}, {
+		desc: "NilPtr",
+		in:   (*proto3pb.Message)(nil), want: (*proto3pb.Message)(nil), // Should not panic
+	}, {
+		desc: "Nested",
+		in: &proto3pb.Message{
+			Name:             "Aaron",
+			Nested:           &proto3pb.Nested{Cute: true, XXX_unrecognized: []byte("blah")},
+			XXX_unrecognized: []byte("blah"),
+		},
+		want: &proto3pb.Message{
+			Name:   "Aaron",
+			Nested: &proto3pb.Nested{Cute: true},
+		},
+	}, {
+		desc: "Slice",
+		in: &proto3pb.Message{
+			Name: "Aaron",
+			Children: []*proto3pb.Message{
+				{Name: "Sarah", XXX_unrecognized: []byte("blah")},
+				{Name: "Abraham", XXX_unrecognized: []byte("blah")},
+			},
+			XXX_unrecognized: []byte("blah"),
+		},
+		want: &proto3pb.Message{
+			Name: "Aaron",
+			Children: []*proto3pb.Message{
+				{Name: "Sarah"},
+				{Name: "Abraham"},
+			},
+		},
+	}, {
+		desc: "OneOf",
+		in: &pb.Communique{
+			Union: &pb.Communique_Msg{&pb.Strings{
+				StringField:      proto.String("123"),
+				XXX_unrecognized: []byte("blah"),
+			}},
+			XXX_unrecognized: []byte("blah"),
+		},
+		want: &pb.Communique{
+			Union: &pb.Communique_Msg{&pb.Strings{StringField: proto.String("123")}},
+		},
+	}, {
+		desc: "Map",
+		in: &pb.MessageWithMap{MsgMapping: map[int64]*pb.FloatingPoint{
+			0x4002: &pb.FloatingPoint{
+				Exact:            proto.Bool(true),
+				XXX_unrecognized: []byte("blah"),
+			},
+		}},
+		want: &pb.MessageWithMap{MsgMapping: map[int64]*pb.FloatingPoint{
+			0x4002: &pb.FloatingPoint{Exact: proto.Bool(true)},
+		}},
+	}, {
+		desc: "Extension",
+		in: func() proto.Message {
+			m := &pb.MyMessage{
+				Count: proto.Int32(42),
+				Somegroup: &pb.MyMessage_SomeGroup{
+					GroupField:       proto.Int32(6),
+					XXX_unrecognized: []byte("blah"),
+				},
+				XXX_unrecognized: []byte("blah"),
+			}
+			proto.SetExtension(m, pb.E_Ext_More, &pb.Ext{
+				Data:             proto.String("extension"),
+				XXX_unrecognized: []byte("blah"),
+			})
+			return m
+		}(),
+		want: func() proto.Message {
+			m := &pb.MyMessage{
+				Count:     proto.Int32(42),
+				Somegroup: &pb.MyMessage_SomeGroup{GroupField: proto.Int32(6)},
+			}
+			proto.SetExtension(m, pb.E_Ext_More, &pb.Ext{Data: proto.String("extension")})
+			return m
+		}(),
+	}}
+
+	// Test the legacy code path.
+	for _, tt := range tests {
+		// Clone the input so that we don't alter the original.
+		in := tt.in
+		if in != nil {
+			in = proto.Clone(tt.in)
+		}
+
+		var m LegacyMessage
+		m.Message, _ = in.(*proto3pb.Message)
+		m.Communique, _ = in.(*pb.Communique)
+		m.MessageWithMap, _ = in.(*pb.MessageWithMap)
+		m.MyMessage, _ = in.(*pb.MyMessage)
+		proto.DiscardUnknown(&m)
+		if !proto.Equal(in, tt.want) {
+			t.Errorf("test %s/Legacy, expected unknown fields to be discarded\ngot  %v\nwant %v", tt.desc, in, tt.want)
+		}
+	}
+
+	for _, tt := range tests {
+		proto.DiscardUnknown(tt.in)
+		if !proto.Equal(tt.in, tt.want) {
+			t.Errorf("test %s, expected unknown fields to be discarded\ngot  %v\nwant %v", tt.desc, tt.in, tt.want)
+		}
+	}
+}
+
+// LegacyMessage is a proto.Message that has several nested messages.
+// This does not have the XXX_DiscardUnknown method and so forces DiscardUnknown
+// to use the legacy fallback logic.
+type LegacyMessage struct {
+	Message        *proto3pb.Message
+	Communique     *pb.Communique
+	MessageWithMap *pb.MessageWithMap
+	MyMessage      *pb.MyMessage
+}
+
+func (m *LegacyMessage) Reset()         { *m = LegacyMessage{} }
+func (m *LegacyMessage) String() string { return proto.CompactTextString(m) }
+func (*LegacyMessage) ProtoMessage()    {}
diff --git a/proto/encode.go b/proto/encode.go
index 8b84d1b..c27d35f 100644
--- a/proto/encode.go
+++ b/proto/encode.go
@@ -39,7 +39,6 @@
 	"errors"
 	"fmt"
 	"reflect"
-	"sort"
 )
 
 // RequiredNotSetError is the error returned if Marshal is called with
@@ -82,10 +81,6 @@
 
 const maxVarintBytes = 10 // maximum length of a varint
 
-// maxMarshalSize is the largest allowed size of an encoded protobuf,
-// since C++ and Java use signed int32s for the size.
-const maxMarshalSize = 1<<31 - 1
-
 // EncodeVarint returns the varint encoding of x.
 // This is the format for the
 // int32, int64, uint32, uint64, bool, and enum
@@ -119,18 +114,27 @@
 
 // SizeVarint returns the varint encoding size of an integer.
 func SizeVarint(x uint64) int {
-	return sizeVarint(x)
-}
-
-func sizeVarint(x uint64) (n int) {
-	for {
-		n++
-		x >>= 7
-		if x == 0 {
-			break
-		}
+	switch {
+	case x < 1<<7:
+		return 1
+	case x < 1<<14:
+		return 2
+	case x < 1<<21:
+		return 3
+	case x < 1<<28:
+		return 4
+	case x < 1<<35:
+		return 5
+	case x < 1<<42:
+		return 6
+	case x < 1<<49:
+		return 7
+	case x < 1<<56:
+		return 8
+	case x < 1<<63:
+		return 9
 	}
-	return n
+	return 10
 }
 
 // EncodeFixed64 writes a 64-bit integer to the Buffer.
@@ -149,10 +153,6 @@
 	return nil
 }
 
-func sizeFixed64(x uint64) int {
-	return 8
-}
-
 // EncodeFixed32 writes a 32-bit integer to the Buffer.
 // This is the format for the
 // fixed32, sfixed32, and float protocol buffer types.
@@ -165,20 +165,12 @@
 	return nil
 }
 
-func sizeFixed32(x uint64) int {
-	return 4
-}
-
 // EncodeZigzag64 writes a zigzag-encoded 64-bit integer
 // to the Buffer.
 // This is the format used for the sint64 protocol buffer type.
 func (p *Buffer) EncodeZigzag64(x uint64) error {
 	// use signed number to get arithmetic right shift.
-	return p.EncodeVarint((x << 1) ^ uint64((int64(x) >> 63)))
-}
-
-func sizeZigzag64(x uint64) int {
-	return sizeVarint((x << 1) ^ uint64((int64(x) >> 63)))
+	return p.EncodeVarint(uint64((x << 1) ^ uint64((int64(x) >> 63))))
 }
 
 // EncodeZigzag32 writes a zigzag-encoded 32-bit integer
@@ -189,10 +181,6 @@
 	return p.EncodeVarint(uint64((uint32(x) << 1) ^ uint32((int32(x) >> 31))))
 }
 
-func sizeZigzag32(x uint64) int {
-	return sizeVarint(uint64((uint32(x) << 1) ^ uint32((int32(x) >> 31))))
-}
-
 // EncodeRawBytes writes a count-delimited byte buffer to the Buffer.
 // This is the format used for the bytes protocol buffer
 // type and for embedded messages.
@@ -202,11 +190,6 @@
 	return nil
 }
 
-func sizeRawBytes(b []byte) int {
-	return sizeVarint(uint64(len(b))) +
-		len(b)
-}
-
 // EncodeStringBytes writes an encoded string to the Buffer.
 // This is the format used for the proto2 string type.
 func (p *Buffer) EncodeStringBytes(s string) error {
@@ -215,319 +198,17 @@
 	return nil
 }
 
-func sizeStringBytes(s string) int {
-	return sizeVarint(uint64(len(s))) +
-		len(s)
-}
-
 // Marshaler is the interface representing objects that can marshal themselves.
 type Marshaler interface {
 	Marshal() ([]byte, error)
 }
 
-// Marshal takes the protocol buffer
-// and encodes it into the wire format, returning the data.
-func Marshal(pb Message) ([]byte, error) {
-	// Can the object marshal itself?
-	if m, ok := pb.(Marshaler); ok {
-		return m.Marshal()
-	}
-	p := NewBuffer(nil)
-	err := p.Marshal(pb)
-	if p.buf == nil && err == nil {
-		// Return a non-nil slice on success.
-		return []byte{}, nil
-	}
-	return p.buf, err
-}
-
 // EncodeMessage writes the protocol buffer to the Buffer,
 // prefixed by a varint-encoded length.
 func (p *Buffer) EncodeMessage(pb Message) error {
-	t, base, err := getbase(pb)
-	if structPointer_IsNil(base) {
-		return ErrNil
-	}
-	if err == nil {
-		var state errorState
-		err = p.enc_len_struct(GetProperties(t.Elem()), base, &state)
-	}
-	return err
-}
-
-// Marshal takes the protocol buffer
-// and encodes it into the wire format, writing the result to the
-// Buffer.
-func (p *Buffer) Marshal(pb Message) error {
-	// Can the object marshal itself?
-	if m, ok := pb.(Marshaler); ok {
-		data, err := m.Marshal()
-		p.buf = append(p.buf, data...)
-		return err
-	}
-
-	t, base, err := getbase(pb)
-	if structPointer_IsNil(base) {
-		return ErrNil
-	}
-	if err == nil {
-		err = p.enc_struct(GetProperties(t.Elem()), base)
-	}
-
-	if collectStats {
-		(stats).Encode++ // Parens are to work around a goimports bug.
-	}
-
-	if len(p.buf) > maxMarshalSize {
-		return ErrTooLarge
-	}
-	return err
-}
-
-// Size returns the encoded size of a protocol buffer.
-func Size(pb Message) (n int) {
-	// Can the object marshal itself?  If so, Size is slow.
-	// TODO: add Size to Marshaler, or add a Sizer interface.
-	if m, ok := pb.(Marshaler); ok {
-		b, _ := m.Marshal()
-		return len(b)
-	}
-
-	t, base, err := getbase(pb)
-	if structPointer_IsNil(base) {
-		return 0
-	}
-	if err == nil {
-		n = size_struct(GetProperties(t.Elem()), base)
-	}
-
-	if collectStats {
-		(stats).Size++ // Parens are to work around a goimports bug.
-	}
-
-	return
-}
-
-// Individual type encoders.
-
-// Encode a bool.
-func (o *Buffer) enc_bool(p *Properties, base structPointer) error {
-	v := *structPointer_Bool(base, p.field)
-	if v == nil {
-		return ErrNil
-	}
-	x := 0
-	if *v {
-		x = 1
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, uint64(x))
-	return nil
-}
-
-func (o *Buffer) enc_proto3_bool(p *Properties, base structPointer) error {
-	v := *structPointer_BoolVal(base, p.field)
-	if !v {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, 1)
-	return nil
-}
-
-func size_bool(p *Properties, base structPointer) int {
-	v := *structPointer_Bool(base, p.field)
-	if v == nil {
-		return 0
-	}
-	return len(p.tagcode) + 1 // each bool takes exactly one byte
-}
-
-func size_proto3_bool(p *Properties, base structPointer) int {
-	v := *structPointer_BoolVal(base, p.field)
-	if !v && !p.oneof {
-		return 0
-	}
-	return len(p.tagcode) + 1 // each bool takes exactly one byte
-}
-
-// Encode an int32.
-func (o *Buffer) enc_int32(p *Properties, base structPointer) error {
-	v := structPointer_Word32(base, p.field)
-	if word32_IsNil(v) {
-		return ErrNil
-	}
-	x := int32(word32_Get(v)) // permit sign extension to use full 64-bit range
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, uint64(x))
-	return nil
-}
-
-func (o *Buffer) enc_proto3_int32(p *Properties, base structPointer) error {
-	v := structPointer_Word32Val(base, p.field)
-	x := int32(word32Val_Get(v)) // permit sign extension to use full 64-bit range
-	if x == 0 {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, uint64(x))
-	return nil
-}
-
-func size_int32(p *Properties, base structPointer) (n int) {
-	v := structPointer_Word32(base, p.field)
-	if word32_IsNil(v) {
-		return 0
-	}
-	x := int32(word32_Get(v)) // permit sign extension to use full 64-bit range
-	n += len(p.tagcode)
-	n += p.valSize(uint64(x))
-	return
-}
-
-func size_proto3_int32(p *Properties, base structPointer) (n int) {
-	v := structPointer_Word32Val(base, p.field)
-	x := int32(word32Val_Get(v)) // permit sign extension to use full 64-bit range
-	if x == 0 && !p.oneof {
-		return 0
-	}
-	n += len(p.tagcode)
-	n += p.valSize(uint64(x))
-	return
-}
-
-// Encode a uint32.
-// Exactly the same as int32, except for no sign extension.
-func (o *Buffer) enc_uint32(p *Properties, base structPointer) error {
-	v := structPointer_Word32(base, p.field)
-	if word32_IsNil(v) {
-		return ErrNil
-	}
-	x := word32_Get(v)
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, uint64(x))
-	return nil
-}
-
-func (o *Buffer) enc_proto3_uint32(p *Properties, base structPointer) error {
-	v := structPointer_Word32Val(base, p.field)
-	x := word32Val_Get(v)
-	if x == 0 {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, uint64(x))
-	return nil
-}
-
-func size_uint32(p *Properties, base structPointer) (n int) {
-	v := structPointer_Word32(base, p.field)
-	if word32_IsNil(v) {
-		return 0
-	}
-	x := word32_Get(v)
-	n += len(p.tagcode)
-	n += p.valSize(uint64(x))
-	return
-}
-
-func size_proto3_uint32(p *Properties, base structPointer) (n int) {
-	v := structPointer_Word32Val(base, p.field)
-	x := word32Val_Get(v)
-	if x == 0 && !p.oneof {
-		return 0
-	}
-	n += len(p.tagcode)
-	n += p.valSize(uint64(x))
-	return
-}
-
-// Encode an int64.
-func (o *Buffer) enc_int64(p *Properties, base structPointer) error {
-	v := structPointer_Word64(base, p.field)
-	if word64_IsNil(v) {
-		return ErrNil
-	}
-	x := word64_Get(v)
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, x)
-	return nil
-}
-
-func (o *Buffer) enc_proto3_int64(p *Properties, base structPointer) error {
-	v := structPointer_Word64Val(base, p.field)
-	x := word64Val_Get(v)
-	if x == 0 {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	p.valEnc(o, x)
-	return nil
-}
-
-func size_int64(p *Properties, base structPointer) (n int) {
-	v := structPointer_Word64(base, p.field)
-	if word64_IsNil(v) {
-		return 0
-	}
-	x := word64_Get(v)
-	n += len(p.tagcode)
-	n += p.valSize(x)
-	return
-}
-
-func size_proto3_int64(p *Properties, base structPointer) (n int) {
-	v := structPointer_Word64Val(base, p.field)
-	x := word64Val_Get(v)
-	if x == 0 && !p.oneof {
-		return 0
-	}
-	n += len(p.tagcode)
-	n += p.valSize(x)
-	return
-}
-
-// Encode a string.
-func (o *Buffer) enc_string(p *Properties, base structPointer) error {
-	v := *structPointer_String(base, p.field)
-	if v == nil {
-		return ErrNil
-	}
-	x := *v
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeStringBytes(x)
-	return nil
-}
-
-func (o *Buffer) enc_proto3_string(p *Properties, base structPointer) error {
-	v := *structPointer_StringVal(base, p.field)
-	if v == "" {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeStringBytes(v)
-	return nil
-}
-
-func size_string(p *Properties, base structPointer) (n int) {
-	v := *structPointer_String(base, p.field)
-	if v == nil {
-		return 0
-	}
-	x := *v
-	n += len(p.tagcode)
-	n += sizeStringBytes(x)
-	return
-}
-
-func size_proto3_string(p *Properties, base structPointer) (n int) {
-	v := *structPointer_StringVal(base, p.field)
-	if v == "" && !p.oneof {
-		return 0
-	}
-	n += len(p.tagcode)
-	n += sizeStringBytes(v)
-	return
+	siz := Size(pb)
+	p.EncodeVarint(uint64(siz))
+	return p.Marshal(pb)
 }
 
 // All protocol buffer fields are nillable, but be careful.
@@ -538,825 +219,3 @@
 	}
 	return false
 }
-
-// Encode a message struct.
-func (o *Buffer) enc_struct_message(p *Properties, base structPointer) error {
-	var state errorState
-	structp := structPointer_GetStructPointer(base, p.field)
-	if structPointer_IsNil(structp) {
-		return ErrNil
-	}
-
-	// Can the object marshal itself?
-	if p.isMarshaler {
-		m := structPointer_Interface(structp, p.stype).(Marshaler)
-		data, err := m.Marshal()
-		if err != nil && !state.shouldContinue(err, nil) {
-			return err
-		}
-		o.buf = append(o.buf, p.tagcode...)
-		o.EncodeRawBytes(data)
-		return state.err
-	}
-
-	o.buf = append(o.buf, p.tagcode...)
-	return o.enc_len_struct(p.sprop, structp, &state)
-}
-
-func size_struct_message(p *Properties, base structPointer) int {
-	structp := structPointer_GetStructPointer(base, p.field)
-	if structPointer_IsNil(structp) {
-		return 0
-	}
-
-	// Can the object marshal itself?
-	if p.isMarshaler {
-		m := structPointer_Interface(structp, p.stype).(Marshaler)
-		data, _ := m.Marshal()
-		n0 := len(p.tagcode)
-		n1 := sizeRawBytes(data)
-		return n0 + n1
-	}
-
-	n0 := len(p.tagcode)
-	n1 := size_struct(p.sprop, structp)
-	n2 := sizeVarint(uint64(n1)) // size of encoded length
-	return n0 + n1 + n2
-}
-
-// Encode a group struct.
-func (o *Buffer) enc_struct_group(p *Properties, base structPointer) error {
-	var state errorState
-	b := structPointer_GetStructPointer(base, p.field)
-	if structPointer_IsNil(b) {
-		return ErrNil
-	}
-
-	o.EncodeVarint(uint64((p.Tag << 3) | WireStartGroup))
-	err := o.enc_struct(p.sprop, b)
-	if err != nil && !state.shouldContinue(err, nil) {
-		return err
-	}
-	o.EncodeVarint(uint64((p.Tag << 3) | WireEndGroup))
-	return state.err
-}
-
-func size_struct_group(p *Properties, base structPointer) (n int) {
-	b := structPointer_GetStructPointer(base, p.field)
-	if structPointer_IsNil(b) {
-		return 0
-	}
-
-	n += sizeVarint(uint64((p.Tag << 3) | WireStartGroup))
-	n += size_struct(p.sprop, b)
-	n += sizeVarint(uint64((p.Tag << 3) | WireEndGroup))
-	return
-}
-
-// Encode a slice of bools ([]bool).
-func (o *Buffer) enc_slice_bool(p *Properties, base structPointer) error {
-	s := *structPointer_BoolSlice(base, p.field)
-	l := len(s)
-	if l == 0 {
-		return ErrNil
-	}
-	for _, x := range s {
-		o.buf = append(o.buf, p.tagcode...)
-		v := uint64(0)
-		if x {
-			v = 1
-		}
-		p.valEnc(o, v)
-	}
-	return nil
-}
-
-func size_slice_bool(p *Properties, base structPointer) int {
-	s := *structPointer_BoolSlice(base, p.field)
-	l := len(s)
-	if l == 0 {
-		return 0
-	}
-	return l * (len(p.tagcode) + 1) // each bool takes exactly one byte
-}
-
-// Encode a slice of bools ([]bool) in packed format.
-func (o *Buffer) enc_slice_packed_bool(p *Properties, base structPointer) error {
-	s := *structPointer_BoolSlice(base, p.field)
-	l := len(s)
-	if l == 0 {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeVarint(uint64(l)) // each bool takes exactly one byte
-	for _, x := range s {
-		v := uint64(0)
-		if x {
-			v = 1
-		}
-		p.valEnc(o, v)
-	}
-	return nil
-}
-
-func size_slice_packed_bool(p *Properties, base structPointer) (n int) {
-	s := *structPointer_BoolSlice(base, p.field)
-	l := len(s)
-	if l == 0 {
-		return 0
-	}
-	n += len(p.tagcode)
-	n += sizeVarint(uint64(l))
-	n += l // each bool takes exactly one byte
-	return
-}
-
-// Encode a slice of bytes ([]byte).
-func (o *Buffer) enc_slice_byte(p *Properties, base structPointer) error {
-	s := *structPointer_Bytes(base, p.field)
-	if s == nil {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeRawBytes(s)
-	return nil
-}
-
-func (o *Buffer) enc_proto3_slice_byte(p *Properties, base structPointer) error {
-	s := *structPointer_Bytes(base, p.field)
-	if len(s) == 0 {
-		return ErrNil
-	}
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeRawBytes(s)
-	return nil
-}
-
-func size_slice_byte(p *Properties, base structPointer) (n int) {
-	s := *structPointer_Bytes(base, p.field)
-	if s == nil && !p.oneof {
-		return 0
-	}
-	n += len(p.tagcode)
-	n += sizeRawBytes(s)
-	return
-}
-
-func size_proto3_slice_byte(p *Properties, base structPointer) (n int) {
-	s := *structPointer_Bytes(base, p.field)
-	if len(s) == 0 && !p.oneof {
-		return 0
-	}
-	n += len(p.tagcode)
-	n += sizeRawBytes(s)
-	return
-}
-
-// Encode a slice of int32s ([]int32).
-func (o *Buffer) enc_slice_int32(p *Properties, base structPointer) error {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return ErrNil
-	}
-	for i := 0; i < l; i++ {
-		o.buf = append(o.buf, p.tagcode...)
-		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
-		p.valEnc(o, uint64(x))
-	}
-	return nil
-}
-
-func size_slice_int32(p *Properties, base structPointer) (n int) {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return 0
-	}
-	for i := 0; i < l; i++ {
-		n += len(p.tagcode)
-		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
-		n += p.valSize(uint64(x))
-	}
-	return
-}
-
-// Encode a slice of int32s ([]int32) in packed format.
-func (o *Buffer) enc_slice_packed_int32(p *Properties, base structPointer) error {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return ErrNil
-	}
-	// TODO: Reuse a Buffer.
-	buf := NewBuffer(nil)
-	for i := 0; i < l; i++ {
-		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
-		p.valEnc(buf, uint64(x))
-	}
-
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeVarint(uint64(len(buf.buf)))
-	o.buf = append(o.buf, buf.buf...)
-	return nil
-}
-
-func size_slice_packed_int32(p *Properties, base structPointer) (n int) {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return 0
-	}
-	var bufSize int
-	for i := 0; i < l; i++ {
-		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
-		bufSize += p.valSize(uint64(x))
-	}
-
-	n += len(p.tagcode)
-	n += sizeVarint(uint64(bufSize))
-	n += bufSize
-	return
-}
-
-// Encode a slice of uint32s ([]uint32).
-// Exactly the same as int32, except for no sign extension.
-func (o *Buffer) enc_slice_uint32(p *Properties, base structPointer) error {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return ErrNil
-	}
-	for i := 0; i < l; i++ {
-		o.buf = append(o.buf, p.tagcode...)
-		x := s.Index(i)
-		p.valEnc(o, uint64(x))
-	}
-	return nil
-}
-
-func size_slice_uint32(p *Properties, base structPointer) (n int) {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return 0
-	}
-	for i := 0; i < l; i++ {
-		n += len(p.tagcode)
-		x := s.Index(i)
-		n += p.valSize(uint64(x))
-	}
-	return
-}
-
-// Encode a slice of uint32s ([]uint32) in packed format.
-// Exactly the same as int32, except for no sign extension.
-func (o *Buffer) enc_slice_packed_uint32(p *Properties, base structPointer) error {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return ErrNil
-	}
-	// TODO: Reuse a Buffer.
-	buf := NewBuffer(nil)
-	for i := 0; i < l; i++ {
-		p.valEnc(buf, uint64(s.Index(i)))
-	}
-
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeVarint(uint64(len(buf.buf)))
-	o.buf = append(o.buf, buf.buf...)
-	return nil
-}
-
-func size_slice_packed_uint32(p *Properties, base structPointer) (n int) {
-	s := structPointer_Word32Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return 0
-	}
-	var bufSize int
-	for i := 0; i < l; i++ {
-		bufSize += p.valSize(uint64(s.Index(i)))
-	}
-
-	n += len(p.tagcode)
-	n += sizeVarint(uint64(bufSize))
-	n += bufSize
-	return
-}
-
-// Encode a slice of int64s ([]int64).
-func (o *Buffer) enc_slice_int64(p *Properties, base structPointer) error {
-	s := structPointer_Word64Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return ErrNil
-	}
-	for i := 0; i < l; i++ {
-		o.buf = append(o.buf, p.tagcode...)
-		p.valEnc(o, s.Index(i))
-	}
-	return nil
-}
-
-func size_slice_int64(p *Properties, base structPointer) (n int) {
-	s := structPointer_Word64Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return 0
-	}
-	for i := 0; i < l; i++ {
-		n += len(p.tagcode)
-		n += p.valSize(s.Index(i))
-	}
-	return
-}
-
-// Encode a slice of int64s ([]int64) in packed format.
-func (o *Buffer) enc_slice_packed_int64(p *Properties, base structPointer) error {
-	s := structPointer_Word64Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return ErrNil
-	}
-	// TODO: Reuse a Buffer.
-	buf := NewBuffer(nil)
-	for i := 0; i < l; i++ {
-		p.valEnc(buf, s.Index(i))
-	}
-
-	o.buf = append(o.buf, p.tagcode...)
-	o.EncodeVarint(uint64(len(buf.buf)))
-	o.buf = append(o.buf, buf.buf...)
-	return nil
-}
-
-func size_slice_packed_int64(p *Properties, base structPointer) (n int) {
-	s := structPointer_Word64Slice(base, p.field)
-	l := s.Len()
-	if l == 0 {
-		return 0
-	}
-	var bufSize int
-	for i := 0; i < l; i++ {
-		bufSize += p.valSize(s.Index(i))
-	}
-
-	n += len(p.tagcode)
-	n += sizeVarint(uint64(bufSize))
-	n += bufSize
-	return
-}
-
-// Encode a slice of slice of bytes ([][]byte).
-func (o *Buffer) enc_slice_slice_byte(p *Properties, base structPointer) error {
-	ss := *structPointer_BytesSlice(base, p.field)
-	l := len(ss)
-	if l == 0 {
-		return ErrNil
-	}
-	for i := 0; i < l; i++ {
-		o.buf = append(o.buf, p.tagcode...)
-		o.EncodeRawBytes(ss[i])
-	}
-	return nil
-}
-
-func size_slice_slice_byte(p *Properties, base structPointer) (n int) {
-	ss := *structPointer_BytesSlice(base, p.field)
-	l := len(ss)
-	if l == 0 {
-		return 0
-	}
-	n += l * len(p.tagcode)
-	for i := 0; i < l; i++ {
-		n += sizeRawBytes(ss[i])
-	}
-	return
-}
-
-// Encode a slice of strings ([]string).
-func (o *Buffer) enc_slice_string(p *Properties, base structPointer) error {
-	ss := *structPointer_StringSlice(base, p.field)
-	l := len(ss)
-	for i := 0; i < l; i++ {
-		o.buf = append(o.buf, p.tagcode...)
-		o.EncodeStringBytes(ss[i])
-	}
-	return nil
-}
-
-func size_slice_string(p *Properties, base structPointer) (n int) {
-	ss := *structPointer_StringSlice(base, p.field)
-	l := len(ss)
-	n += l * len(p.tagcode)
-	for i := 0; i < l; i++ {
-		n += sizeStringBytes(ss[i])
-	}
-	return
-}
-
-// Encode a slice of message structs ([]*struct).
-func (o *Buffer) enc_slice_struct_message(p *Properties, base structPointer) error {
-	var state errorState
-	s := structPointer_StructPointerSlice(base, p.field)
-	l := s.Len()
-
-	for i := 0; i < l; i++ {
-		structp := s.Index(i)
-		if structPointer_IsNil(structp) {
-			return errRepeatedHasNil
-		}
-
-		// Can the object marshal itself?
-		if p.isMarshaler {
-			m := structPointer_Interface(structp, p.stype).(Marshaler)
-			data, err := m.Marshal()
-			if err != nil && !state.shouldContinue(err, nil) {
-				return err
-			}
-			o.buf = append(o.buf, p.tagcode...)
-			o.EncodeRawBytes(data)
-			continue
-		}
-
-		o.buf = append(o.buf, p.tagcode...)
-		err := o.enc_len_struct(p.sprop, structp, &state)
-		if err != nil && !state.shouldContinue(err, nil) {
-			if err == ErrNil {
-				return errRepeatedHasNil
-			}
-			return err
-		}
-	}
-	return state.err
-}
-
-func size_slice_struct_message(p *Properties, base structPointer) (n int) {
-	s := structPointer_StructPointerSlice(base, p.field)
-	l := s.Len()
-	n += l * len(p.tagcode)
-	for i := 0; i < l; i++ {
-		structp := s.Index(i)
-		if structPointer_IsNil(structp) {
-			return // return the size up to this point
-		}
-
-		// Can the object marshal itself?
-		if p.isMarshaler {
-			m := structPointer_Interface(structp, p.stype).(Marshaler)
-			data, _ := m.Marshal()
-			n += sizeRawBytes(data)
-			continue
-		}
-
-		n0 := size_struct(p.sprop, structp)
-		n1 := sizeVarint(uint64(n0)) // size of encoded length
-		n += n0 + n1
-	}
-	return
-}
-
-// Encode a slice of group structs ([]*struct).
-func (o *Buffer) enc_slice_struct_group(p *Properties, base structPointer) error {
-	var state errorState
-	s := structPointer_StructPointerSlice(base, p.field)
-	l := s.Len()
-
-	for i := 0; i < l; i++ {
-		b := s.Index(i)
-		if structPointer_IsNil(b) {
-			return errRepeatedHasNil
-		}
-
-		o.EncodeVarint(uint64((p.Tag << 3) | WireStartGroup))
-
-		err := o.enc_struct(p.sprop, b)
-
-		if err != nil && !state.shouldContinue(err, nil) {
-			if err == ErrNil {
-				return errRepeatedHasNil
-			}
-			return err
-		}
-
-		o.EncodeVarint(uint64((p.Tag << 3) | WireEndGroup))
-	}
-	return state.err
-}
-
-func size_slice_struct_group(p *Properties, base structPointer) (n int) {
-	s := structPointer_StructPointerSlice(base, p.field)
-	l := s.Len()
-
-	n += l * sizeVarint(uint64((p.Tag<<3)|WireStartGroup))
-	n += l * sizeVarint(uint64((p.Tag<<3)|WireEndGroup))
-	for i := 0; i < l; i++ {
-		b := s.Index(i)
-		if structPointer_IsNil(b) {
-			return // return size up to this point
-		}
-
-		n += size_struct(p.sprop, b)
-	}
-	return
-}
-
-// Encode an extension map.
-func (o *Buffer) enc_map(p *Properties, base structPointer) error {
-	exts := structPointer_ExtMap(base, p.field)
-	if err := encodeExtensionsMap(*exts); err != nil {
-		return err
-	}
-
-	return o.enc_map_body(*exts)
-}
-
-func (o *Buffer) enc_exts(p *Properties, base structPointer) error {
-	exts := structPointer_Extensions(base, p.field)
-
-	v, mu := exts.extensionsRead()
-	if v == nil {
-		return nil
-	}
-
-	mu.Lock()
-	defer mu.Unlock()
-	if err := encodeExtensionsMap(v); err != nil {
-		return err
-	}
-
-	return o.enc_map_body(v)
-}
-
-func (o *Buffer) enc_map_body(v map[int32]Extension) error {
-	// Fast-path for common cases: zero or one extensions.
-	if len(v) <= 1 {
-		for _, e := range v {
-			o.buf = append(o.buf, e.enc...)
-		}
-		return nil
-	}
-
-	// Sort keys to provide a deterministic encoding.
-	keys := make([]int, 0, len(v))
-	for k := range v {
-		keys = append(keys, int(k))
-	}
-	sort.Ints(keys)
-
-	for _, k := range keys {
-		o.buf = append(o.buf, v[int32(k)].enc...)
-	}
-	return nil
-}
-
-func size_map(p *Properties, base structPointer) int {
-	v := structPointer_ExtMap(base, p.field)
-	return extensionsMapSize(*v)
-}
-
-func size_exts(p *Properties, base structPointer) int {
-	v := structPointer_Extensions(base, p.field)
-	return extensionsSize(v)
-}
-
-// Encode a map field.
-func (o *Buffer) enc_new_map(p *Properties, base structPointer) error {
-	var state errorState // XXX: or do we need to plumb this through?
-
-	/*
-		A map defined as
-			map<key_type, value_type> map_field = N;
-		is encoded in the same way as
-			message MapFieldEntry {
-				key_type key = 1;
-				value_type value = 2;
-			}
-			repeated MapFieldEntry map_field = N;
-	*/
-
-	v := structPointer_NewAt(base, p.field, p.mtype).Elem() // map[K]V
-	if v.Len() == 0 {
-		return nil
-	}
-
-	keycopy, valcopy, keybase, valbase := mapEncodeScratch(p.mtype)
-
-	enc := func() error {
-		if err := p.mkeyprop.enc(o, p.mkeyprop, keybase); err != nil {
-			return err
-		}
-		if err := p.mvalprop.enc(o, p.mvalprop, valbase); err != nil && err != ErrNil {
-			return err
-		}
-		return nil
-	}
-
-	// Don't sort map keys. It is not required by the spec, and C++ doesn't do it.
-	for _, key := range v.MapKeys() {
-		val := v.MapIndex(key)
-
-		keycopy.Set(key)
-		valcopy.Set(val)
-
-		o.buf = append(o.buf, p.tagcode...)
-		if err := o.enc_len_thing(enc, &state); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func size_new_map(p *Properties, base structPointer) int {
-	v := structPointer_NewAt(base, p.field, p.mtype).Elem() // map[K]V
-
-	keycopy, valcopy, keybase, valbase := mapEncodeScratch(p.mtype)
-
-	n := 0
-	for _, key := range v.MapKeys() {
-		val := v.MapIndex(key)
-		keycopy.Set(key)
-		valcopy.Set(val)
-
-		// Tag codes for key and val are the responsibility of the sub-sizer.
-		keysize := p.mkeyprop.size(p.mkeyprop, keybase)
-		valsize := p.mvalprop.size(p.mvalprop, valbase)
-		entry := keysize + valsize
-		// Add on tag code and length of map entry itself.
-		n += len(p.tagcode) + sizeVarint(uint64(entry)) + entry
-	}
-	return n
-}
-
-// mapEncodeScratch returns a new reflect.Value matching the map's value type,
-// and a structPointer suitable for passing to an encoder or sizer.
-func mapEncodeScratch(mapType reflect.Type) (keycopy, valcopy reflect.Value, keybase, valbase structPointer) {
-	// Prepare addressable doubly-indirect placeholders for the key and value types.
-	// This is needed because the element-type encoders expect **T, but the map iteration produces T.
-
-	keycopy = reflect.New(mapType.Key()).Elem()                 // addressable K
-	keyptr := reflect.New(reflect.PtrTo(keycopy.Type())).Elem() // addressable *K
-	keyptr.Set(keycopy.Addr())                                  //
-	keybase = toStructPointer(keyptr.Addr())                    // **K
-
-	// Value types are more varied and require special handling.
-	switch mapType.Elem().Kind() {
-	case reflect.Slice:
-		// []byte
-		var dummy []byte
-		valcopy = reflect.ValueOf(&dummy).Elem() // addressable []byte
-		valbase = toStructPointer(valcopy.Addr())
-	case reflect.Ptr:
-		// message; the generated field type is map[K]*Msg (so V is *Msg),
-		// so we only need one level of indirection.
-		valcopy = reflect.New(mapType.Elem()).Elem() // addressable V
-		valbase = toStructPointer(valcopy.Addr())
-	default:
-		// everything else
-		valcopy = reflect.New(mapType.Elem()).Elem()                // addressable V
-		valptr := reflect.New(reflect.PtrTo(valcopy.Type())).Elem() // addressable *V
-		valptr.Set(valcopy.Addr())                                  //
-		valbase = toStructPointer(valptr.Addr())                    // **V
-	}
-	return
-}
-
-// Encode a struct.
-func (o *Buffer) enc_struct(prop *StructProperties, base structPointer) error {
-	var state errorState
-	// Encode fields in tag order so that decoders may use optimizations
-	// that depend on the ordering.
-	// https://developers.google.com/protocol-buffers/docs/encoding#order
-	for _, i := range prop.order {
-		p := prop.Prop[i]
-		if p.enc != nil {
-			err := p.enc(o, p, base)
-			if err != nil {
-				if err == ErrNil {
-					if p.Required && state.err == nil {
-						state.err = &RequiredNotSetError{p.Name}
-					}
-				} else if err == errRepeatedHasNil {
-					// Give more context to nil values in repeated fields.
-					return errors.New("repeated field " + p.OrigName + " has nil element")
-				} else if !state.shouldContinue(err, p) {
-					return err
-				}
-			}
-			if len(o.buf) > maxMarshalSize {
-				return ErrTooLarge
-			}
-		}
-	}
-
-	// Do oneof fields.
-	if prop.oneofMarshaler != nil {
-		m := structPointer_Interface(base, prop.stype).(Message)
-		if err := prop.oneofMarshaler(m, o); err == ErrNil {
-			return errOneofHasNil
-		} else if err != nil {
-			return err
-		}
-	}
-
-	// Add unrecognized fields at the end.
-	if prop.unrecField.IsValid() {
-		v := *structPointer_Bytes(base, prop.unrecField)
-		if len(o.buf)+len(v) > maxMarshalSize {
-			return ErrTooLarge
-		}
-		if len(v) > 0 {
-			o.buf = append(o.buf, v...)
-		}
-	}
-
-	return state.err
-}
-
-func size_struct(prop *StructProperties, base structPointer) (n int) {
-	for _, i := range prop.order {
-		p := prop.Prop[i]
-		if p.size != nil {
-			n += p.size(p, base)
-		}
-	}
-
-	// Add unrecognized fields at the end.
-	if prop.unrecField.IsValid() {
-		v := *structPointer_Bytes(base, prop.unrecField)
-		n += len(v)
-	}
-
-	// Factor in any oneof fields.
-	if prop.oneofSizer != nil {
-		m := structPointer_Interface(base, prop.stype).(Message)
-		n += prop.oneofSizer(m)
-	}
-
-	return
-}
-
-var zeroes [20]byte // longer than any conceivable sizeVarint
-
-// Encode a struct, preceded by its encoded length (as a varint).
-func (o *Buffer) enc_len_struct(prop *StructProperties, base structPointer, state *errorState) error {
-	return o.enc_len_thing(func() error { return o.enc_struct(prop, base) }, state)
-}
-
-// Encode something, preceded by its encoded length (as a varint).
-func (o *Buffer) enc_len_thing(enc func() error, state *errorState) error {
-	iLen := len(o.buf)
-	o.buf = append(o.buf, 0, 0, 0, 0) // reserve four bytes for length
-	iMsg := len(o.buf)
-	err := enc()
-	if err != nil && !state.shouldContinue(err, nil) {
-		return err
-	}
-	lMsg := len(o.buf) - iMsg
-	lLen := sizeVarint(uint64(lMsg))
-	switch x := lLen - (iMsg - iLen); {
-	case x > 0: // actual length is x bytes larger than the space we reserved
-		// Move msg x bytes right.
-		o.buf = append(o.buf, zeroes[:x]...)
-		copy(o.buf[iMsg+x:], o.buf[iMsg:iMsg+lMsg])
-	case x < 0: // actual length is x bytes smaller than the space we reserved
-		// Move msg x bytes left.
-		copy(o.buf[iMsg+x:], o.buf[iMsg:iMsg+lMsg])
-		o.buf = o.buf[:len(o.buf)+x] // x is negative
-	}
-	// Encode the length in the reserved space.
-	o.buf = o.buf[:iLen]
-	o.EncodeVarint(uint64(lMsg))
-	o.buf = o.buf[:len(o.buf)+lMsg]
-	return state.err
-}
-
-// errorState maintains the first error that occurs and updates that error
-// with additional context.
-type errorState struct {
-	err error
-}
-
-// shouldContinue reports whether encoding should continue upon encountering the
-// given error. If the error is RequiredNotSetError, shouldContinue returns true
-// and, if this is the first appearance of that error, remembers it for future
-// reporting.
-//
-// If prop is not nil, it may update any error with additional context about the
-// field with the error.
-func (s *errorState) shouldContinue(err error, prop *Properties) bool {
-	// Ignore unset required fields.
-	reqNotSet, ok := err.(*RequiredNotSetError)
-	if !ok {
-		return false
-	}
-	if s.err == nil {
-		if prop != nil {
-			err = &RequiredNotSetError{prop.Name + "." + reqNotSet.field}
-		}
-		s.err = err
-	}
-	return true
-}
diff --git a/proto/equal.go b/proto/equal.go
index 2ed1cf5..d4db5a1 100644
--- a/proto/equal.go
+++ b/proto/equal.go
@@ -109,15 +109,6 @@
 				// set/unset mismatch
 				return false
 			}
-			b1, ok := f1.Interface().(raw)
-			if ok {
-				b2 := f2.Interface().(raw)
-				// RawMessage
-				if !bytes.Equal(b1.Bytes(), b2.Bytes()) {
-					return false
-				}
-				continue
-			}
 			f1, f2 = f1.Elem(), f2.Elem()
 		}
 		if !equalAny(f1, f2, sprop.Prop[i]) {
@@ -146,11 +137,7 @@
 
 	u1 := uf.Bytes()
 	u2 := v2.FieldByName("XXX_unrecognized").Bytes()
-	if !bytes.Equal(u1, u2) {
-		return false
-	}
-
-	return true
+	return bytes.Equal(u1, u2)
 }
 
 // v1 and v2 are known to have the same type.
@@ -261,6 +248,15 @@
 
 		m1, m2 := e1.value, e2.value
 
+		if m1 == nil && m2 == nil {
+			// Both have only encoded form.
+			if bytes.Equal(e1.enc, e2.enc) {
+				continue
+			}
+			// The bytes are different, but the extensions might still be
+			// equal. We need to decode them to compare.
+		}
+
 		if m1 != nil && m2 != nil {
 			// Both are unencoded.
 			if !equalAny(reflect.ValueOf(m1), reflect.ValueOf(m2), nil) {
@@ -276,8 +272,12 @@
 			desc = m[extNum]
 		}
 		if desc == nil {
+			// If both have only encoded form and the bytes are the same,
+			// it is handled above. We get here when the bytes are different.
+			// We don't know how to decode it, so just compare them as byte
+			// slices.
 			log.Printf("proto: don't know how to compare extension %d of %v", extNum, base)
-			continue
+			return false
 		}
 		var err error
 		if m1 == nil {
diff --git a/proto/equal_test.go b/proto/equal_test.go
index a2febb3..93ff88f 100644
--- a/proto/equal_test.go
+++ b/proto/equal_test.go
@@ -36,7 +36,7 @@
 
 	. "github.com/golang/protobuf/proto"
 	proto3pb "github.com/golang/protobuf/proto/proto3_proto"
-	pb "github.com/golang/protobuf/proto/testdata"
+	pb "github.com/golang/protobuf/proto/test_proto"
 )
 
 // Four identical base messages.
@@ -45,6 +45,9 @@
 var messageWithExtension1a = &pb.MyMessage{Count: Int32(7)}
 var messageWithExtension1b = &pb.MyMessage{Count: Int32(7)}
 var messageWithExtension2 = &pb.MyMessage{Count: Int32(7)}
+var messageWithExtension3a = &pb.MyMessage{Count: Int32(7)}
+var messageWithExtension3b = &pb.MyMessage{Count: Int32(7)}
+var messageWithExtension3c = &pb.MyMessage{Count: Int32(7)}
 
 // Two messages with non-message extensions.
 var messageWithInt32Extension1 = &pb.MyMessage{Count: Int32(8)}
@@ -83,6 +86,20 @@
 	if err := SetExtension(messageWithInt32Extension1, pb.E_Ext_Number, Int32(24)); err != nil {
 		panic("SetExtension on Int32-2 failed: " + err.Error())
 	}
+
+	// messageWithExtension3{a,b,c} has unregistered extension.
+	if RegisteredExtensions(messageWithExtension3a)[200] != nil {
+		panic("expect extension 200 unregistered")
+	}
+	bytes := []byte{
+		0xc0, 0x0c, 0x01, // id=200, wiretype=0 (varint), data=1
+	}
+	bytes2 := []byte{
+		0xc0, 0x0c, 0x02, // id=200, wiretype=0 (varint), data=2
+	}
+	SetRawExtension(messageWithExtension3a, 200, bytes)
+	SetRawExtension(messageWithExtension3b, 200, bytes)
+	SetRawExtension(messageWithExtension3c, 200, bytes2)
 }
 
 var EqualTests = []struct {
@@ -142,6 +159,9 @@
 	{"int32 extension vs. itself", messageWithInt32Extension1, messageWithInt32Extension1, true},
 	{"int32 extension vs. a different int32", messageWithInt32Extension1, messageWithInt32Extension2, false},
 
+	{"unregistered extension same", messageWithExtension3a, messageWithExtension3b, true},
+	{"unregistered extension different", messageWithExtension3a, messageWithExtension3c, false},
+
 	{
 		"message with group",
 		&pb.MyMessage{
diff --git a/proto/extensions.go b/proto/extensions.go
index eaad218..816a3b9 100644
--- a/proto/extensions.go
+++ b/proto/extensions.go
@@ -38,6 +38,7 @@
 import (
 	"errors"
 	"fmt"
+	"io"
 	"reflect"
 	"strconv"
 	"sync"
@@ -91,14 +92,29 @@
 // extendable returns the extendableProto interface for the given generated proto message.
 // If the proto message has the old extension format, it returns a wrapper that implements
 // the extendableProto interface.
-func extendable(p interface{}) (extendableProto, bool) {
-	if ep, ok := p.(extendableProto); ok {
-		return ep, ok
+func extendable(p interface{}) (extendableProto, error) {
+	switch p := p.(type) {
+	case extendableProto:
+		if isNilPtr(p) {
+			return nil, fmt.Errorf("proto: nil %T is not extendable", p)
+		}
+		return p, nil
+	case extendableProtoV1:
+		if isNilPtr(p) {
+			return nil, fmt.Errorf("proto: nil %T is not extendable", p)
+		}
+		return extensionAdapter{p}, nil
 	}
-	if ep, ok := p.(extendableProtoV1); ok {
-		return extensionAdapter{ep}, ok
-	}
-	return nil, false
+	// Don't allocate a specific error containing %T:
+	// this is the hot path for Clone and MarshalText.
+	return nil, errNotExtendable
+}
+
+var errNotExtendable = errors.New("proto: not an extendable proto.Message")
+
+func isNilPtr(x interface{}) bool {
+	v := reflect.ValueOf(x)
+	return v.Kind() == reflect.Ptr && v.IsNil()
 }
 
 // XXX_InternalExtensions is an internal representation of proto extensions.
@@ -143,9 +159,6 @@
 	return e.p.extensionMap, &e.p.mu
 }
 
-var extendableProtoType = reflect.TypeOf((*extendableProto)(nil)).Elem()
-var extendableProtoV1Type = reflect.TypeOf((*extendableProtoV1)(nil)).Elem()
-
 // ExtensionDesc represents an extension specification.
 // Used in generated code from the protocol compiler.
 type ExtensionDesc struct {
@@ -179,8 +192,8 @@
 
 // SetRawExtension is for testing only.
 func SetRawExtension(base Message, id int32, b []byte) {
-	epb, ok := extendable(base)
-	if !ok {
+	epb, err := extendable(base)
+	if err != nil {
 		return
 	}
 	extmap := epb.extensionsWrite()
@@ -205,7 +218,7 @@
 		pbi = ea.extendableProtoV1
 	}
 	if a, b := reflect.TypeOf(pbi), reflect.TypeOf(extension.ExtendedType); a != b {
-		return errors.New("proto: bad extended type; " + b.String() + " does not extend " + a.String())
+		return fmt.Errorf("proto: bad extended type; %v does not extend %v", b, a)
 	}
 	// Check the range.
 	if !isExtensionField(pb, extension.Field) {
@@ -250,85 +263,11 @@
 	return prop
 }
 
-// encode encodes any unmarshaled (unencoded) extensions in e.
-func encodeExtensions(e *XXX_InternalExtensions) error {
-	m, mu := e.extensionsRead()
-	if m == nil {
-		return nil // fast path
-	}
-	mu.Lock()
-	defer mu.Unlock()
-	return encodeExtensionsMap(m)
-}
-
-// encode encodes any unmarshaled (unencoded) extensions in e.
-func encodeExtensionsMap(m map[int32]Extension) error {
-	for k, e := range m {
-		if e.value == nil || e.desc == nil {
-			// Extension is only in its encoded form.
-			continue
-		}
-
-		// We don't skip extensions that have an encoded form set,
-		// because the extension value may have been mutated after
-		// the last time this function was called.
-
-		et := reflect.TypeOf(e.desc.ExtensionType)
-		props := extensionProperties(e.desc)
-
-		p := NewBuffer(nil)
-		// If e.value has type T, the encoder expects a *struct{ X T }.
-		// Pass a *T with a zero field and hope it all works out.
-		x := reflect.New(et)
-		x.Elem().Set(reflect.ValueOf(e.value))
-		if err := props.enc(p, props, toStructPointer(x)); err != nil {
-			return err
-		}
-		e.enc = p.buf
-		m[k] = e
-	}
-	return nil
-}
-
-func extensionsSize(e *XXX_InternalExtensions) (n int) {
-	m, mu := e.extensionsRead()
-	if m == nil {
-		return 0
-	}
-	mu.Lock()
-	defer mu.Unlock()
-	return extensionsMapSize(m)
-}
-
-func extensionsMapSize(m map[int32]Extension) (n int) {
-	for _, e := range m {
-		if e.value == nil || e.desc == nil {
-			// Extension is only in its encoded form.
-			n += len(e.enc)
-			continue
-		}
-
-		// We don't skip extensions that have an encoded form set,
-		// because the extension value may have been mutated after
-		// the last time this function was called.
-
-		et := reflect.TypeOf(e.desc.ExtensionType)
-		props := extensionProperties(e.desc)
-
-		// If e.value has type T, the encoder expects a *struct{ X T }.
-		// Pass a *T with a zero field and hope it all works out.
-		x := reflect.New(et)
-		x.Elem().Set(reflect.ValueOf(e.value))
-		n += props.size(props, toStructPointer(x))
-	}
-	return
-}
-
 // HasExtension returns whether the given extension is present in pb.
 func HasExtension(pb Message, extension *ExtensionDesc) bool {
 	// TODO: Check types, field numbers, etc.?
-	epb, ok := extendable(pb)
-	if !ok {
+	epb, err := extendable(pb)
+	if err != nil {
 		return false
 	}
 	extmap, mu := epb.extensionsRead()
@@ -336,15 +275,15 @@
 		return false
 	}
 	mu.Lock()
-	_, ok = extmap[extension.Field]
+	_, ok := extmap[extension.Field]
 	mu.Unlock()
 	return ok
 }
 
 // ClearExtension removes the given extension from pb.
 func ClearExtension(pb Message, extension *ExtensionDesc) {
-	epb, ok := extendable(pb)
-	if !ok {
+	epb, err := extendable(pb)
+	if err != nil {
 		return
 	}
 	// TODO: Check types, field numbers, etc.?
@@ -352,16 +291,26 @@
 	delete(extmap, extension.Field)
 }
 
-// GetExtension parses and returns the given extension of pb.
-// If the extension is not present and has no default value it returns ErrMissingExtension.
+// GetExtension retrieves a proto2 extended field from pb.
+//
+// If the descriptor is type complete (i.e., ExtensionDesc.ExtensionType is non-nil),
+// then GetExtension parses the encoded field and returns a Go value of the specified type.
+// If the field is not present, then the default value is returned (if one is specified),
+// otherwise ErrMissingExtension is reported.
+//
+// If the descriptor is not type complete (i.e., ExtensionDesc.ExtensionType is nil),
+// then GetExtension returns the raw encoded bytes of the field extension.
 func GetExtension(pb Message, extension *ExtensionDesc) (interface{}, error) {
-	epb, ok := extendable(pb)
-	if !ok {
-		return nil, errors.New("proto: not an extendable proto")
+	epb, err := extendable(pb)
+	if err != nil {
+		return nil, err
 	}
 
-	if err := checkExtensionTypes(epb, extension); err != nil {
-		return nil, err
+	if extension.ExtendedType != nil {
+		// can only check type if this is a complete descriptor
+		if err := checkExtensionTypes(epb, extension); err != nil {
+			return nil, err
+		}
 	}
 
 	emap, mu := epb.extensionsRead()
@@ -388,6 +337,11 @@
 		return e.value, nil
 	}
 
+	if extension.ExtensionType == nil {
+		// incomplete descriptor
+		return e.enc, nil
+	}
+
 	v, err := decodeExtension(e.enc, extension)
 	if err != nil {
 		return nil, err
@@ -405,6 +359,11 @@
 // defaultExtensionValue returns the default value for extension.
 // If no default for an extension is defined ErrMissingExtension is returned.
 func defaultExtensionValue(extension *ExtensionDesc) (interface{}, error) {
+	if extension.ExtensionType == nil {
+		// incomplete descriptor, so no default
+		return nil, ErrMissingExtension
+	}
+
 	t := reflect.TypeOf(extension.ExtensionType)
 	props := extensionProperties(extension)
 
@@ -439,31 +398,28 @@
 
 // decodeExtension decodes an extension encoded in b.
 func decodeExtension(b []byte, extension *ExtensionDesc) (interface{}, error) {
-	o := NewBuffer(b)
-
 	t := reflect.TypeOf(extension.ExtensionType)
-
-	props := extensionProperties(extension)
+	unmarshal := typeUnmarshaler(t, extension.Tag)
 
 	// t is a pointer to a struct, pointer to basic type or a slice.
-	// Allocate a "field" to store the pointer/slice itself; the
-	// pointer/slice will be stored here. We pass
-	// the address of this field to props.dec.
-	// This passes a zero field and a *t and lets props.dec
-	// interpret it as a *struct{ x t }.
+	// Allocate space to store the pointer/slice.
 	value := reflect.New(t).Elem()
 
+	var err error
 	for {
-		// Discard wire type and field number varint. It isn't needed.
-		if _, err := o.DecodeVarint(); err != nil {
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		wire := int(x) & 7
+
+		b, err = unmarshal(b, valToPointer(value.Addr()), wire)
+		if err != nil {
 			return nil, err
 		}
 
-		if err := props.dec(o, props, toStructPointer(value.Addr())); err != nil {
-			return nil, err
-		}
-
-		if o.index >= len(o.buf) {
+		if len(b) == 0 {
 			break
 		}
 	}
@@ -473,9 +429,9 @@
 // GetExtensions returns a slice of the extensions present in pb that are also listed in es.
 // The returned slice has the same length as es; missing extensions will appear as nil elements.
 func GetExtensions(pb Message, es []*ExtensionDesc) (extensions []interface{}, err error) {
-	epb, ok := extendable(pb)
-	if !ok {
-		return nil, errors.New("proto: not an extendable proto")
+	epb, err := extendable(pb)
+	if err != nil {
+		return nil, err
 	}
 	extensions = make([]interface{}, len(es))
 	for i, e := range es {
@@ -494,9 +450,9 @@
 // For non-registered extensions, ExtensionDescs returns an incomplete descriptor containing
 // just the Field field, which defines the extension's field number.
 func ExtensionDescs(pb Message) ([]*ExtensionDesc, error) {
-	epb, ok := extendable(pb)
-	if !ok {
-		return nil, fmt.Errorf("proto: %T is not an extendable proto.Message", pb)
+	epb, err := extendable(pb)
+	if err != nil {
+		return nil, err
 	}
 	registeredExtensions := RegisteredExtensions(pb)
 
@@ -523,9 +479,9 @@
 
 // SetExtension sets the specified extension of pb to the specified value.
 func SetExtension(pb Message, extension *ExtensionDesc, value interface{}) error {
-	epb, ok := extendable(pb)
-	if !ok {
-		return errors.New("proto: not an extendable proto")
+	epb, err := extendable(pb)
+	if err != nil {
+		return err
 	}
 	if err := checkExtensionTypes(epb, extension); err != nil {
 		return err
@@ -550,8 +506,8 @@
 
 // ClearAllExtensions clears all extensions from pb.
 func ClearAllExtensions(pb Message) {
-	epb, ok := extendable(pb)
-	if !ok {
+	epb, err := extendable(pb)
+	if err != nil {
 		return
 	}
 	m := epb.extensionsWrite()
diff --git a/proto/extensions_test.go b/proto/extensions_test.go
index a255030..dc69fe9 100644
--- a/proto/extensions_test.go
+++ b/proto/extensions_test.go
@@ -34,12 +34,14 @@
 import (
 	"bytes"
 	"fmt"
+	"io"
 	"reflect"
 	"sort"
+	"strings"
 	"testing"
 
 	"github.com/golang/protobuf/proto"
-	pb "github.com/golang/protobuf/proto/testdata"
+	pb "github.com/golang/protobuf/proto/test_proto"
 	"golang.org/x/sync/errgroup"
 )
 
@@ -64,7 +66,107 @@
 	}
 }
 
-func TestExtensionDescsWithMissingExtensions(t *testing.T) {
+func TestGetExtensionWithEmptyBuffer(t *testing.T) {
+	// Make sure that GetExtension returns an error if its
+	// undecoded buffer is empty.
+	msg := &pb.MyMessage{}
+	proto.SetRawExtension(msg, pb.E_Ext_More.Field, []byte{})
+	_, err := proto.GetExtension(msg, pb.E_Ext_More)
+	if want := io.ErrUnexpectedEOF; err != want {
+		t.Errorf("unexpected error in GetExtension from empty buffer: got %v, want %v", err, want)
+	}
+}
+
+func TestGetExtensionForIncompleteDesc(t *testing.T) {
+	msg := &pb.MyMessage{Count: proto.Int32(0)}
+	extdesc1 := &proto.ExtensionDesc{
+		ExtendedType:  (*pb.MyMessage)(nil),
+		ExtensionType: (*bool)(nil),
+		Field:         123456789,
+		Name:          "a.b",
+		Tag:           "varint,123456789,opt",
+	}
+	ext1 := proto.Bool(true)
+	if err := proto.SetExtension(msg, extdesc1, ext1); err != nil {
+		t.Fatalf("Could not set ext1: %s", err)
+	}
+	extdesc2 := &proto.ExtensionDesc{
+		ExtendedType:  (*pb.MyMessage)(nil),
+		ExtensionType: ([]byte)(nil),
+		Field:         123456790,
+		Name:          "a.c",
+		Tag:           "bytes,123456790,opt",
+	}
+	ext2 := []byte{0, 1, 2, 3, 4, 5, 6, 7}
+	if err := proto.SetExtension(msg, extdesc2, ext2); err != nil {
+		t.Fatalf("Could not set ext2: %s", err)
+	}
+	extdesc3 := &proto.ExtensionDesc{
+		ExtendedType:  (*pb.MyMessage)(nil),
+		ExtensionType: (*pb.Ext)(nil),
+		Field:         123456791,
+		Name:          "a.d",
+		Tag:           "bytes,123456791,opt",
+	}
+	ext3 := &pb.Ext{Data: proto.String("foo")}
+	if err := proto.SetExtension(msg, extdesc3, ext3); err != nil {
+		t.Fatalf("Could not set ext3: %s", err)
+	}
+
+	b, err := proto.Marshal(msg)
+	if err != nil {
+		t.Fatalf("Could not marshal msg: %v", err)
+	}
+	if err := proto.Unmarshal(b, msg); err != nil {
+		t.Fatalf("Could not unmarshal into msg: %v", err)
+	}
+
+	var expected proto.Buffer
+	if err := expected.EncodeVarint(uint64((extdesc1.Field << 3) | proto.WireVarint)); err != nil {
+		t.Fatalf("failed to compute expected prefix for ext1: %s", err)
+	}
+	if err := expected.EncodeVarint(1 /* bool true */); err != nil {
+		t.Fatalf("failed to compute expected value for ext1: %s", err)
+	}
+
+	if b, err := proto.GetExtension(msg, &proto.ExtensionDesc{Field: extdesc1.Field}); err != nil {
+		t.Fatalf("Failed to get raw value for ext1: %s", err)
+	} else if !reflect.DeepEqual(b, expected.Bytes()) {
+		t.Fatalf("Raw value for ext1: got %v, want %v", b, expected.Bytes())
+	}
+
+	expected = proto.Buffer{} // reset
+	if err := expected.EncodeVarint(uint64((extdesc2.Field << 3) | proto.WireBytes)); err != nil {
+		t.Fatalf("failed to compute expected prefix for ext2: %s", err)
+	}
+	if err := expected.EncodeRawBytes(ext2); err != nil {
+		t.Fatalf("failed to compute expected value for ext2: %s", err)
+	}
+
+	if b, err := proto.GetExtension(msg, &proto.ExtensionDesc{Field: extdesc2.Field}); err != nil {
+		t.Fatalf("Failed to get raw value for ext2: %s", err)
+	} else if !reflect.DeepEqual(b, expected.Bytes()) {
+		t.Fatalf("Raw value for ext2: got %v, want %v", b, expected.Bytes())
+	}
+
+	expected = proto.Buffer{} // reset
+	if err := expected.EncodeVarint(uint64((extdesc3.Field << 3) | proto.WireBytes)); err != nil {
+		t.Fatalf("failed to compute expected prefix for ext3: %s", err)
+	}
+	if b, err := proto.Marshal(ext3); err != nil {
+		t.Fatalf("failed to compute expected value for ext3: %s", err)
+	} else if err := expected.EncodeRawBytes(b); err != nil {
+		t.Fatalf("failed to compute expected value for ext3: %s", err)
+	}
+
+	if b, err := proto.GetExtension(msg, &proto.ExtensionDesc{Field: extdesc3.Field}); err != nil {
+		t.Fatalf("Failed to get raw value for ext3: %s", err)
+	} else if !reflect.DeepEqual(b, expected.Bytes()) {
+		t.Fatalf("Raw value for ext3: got %v, want %v", b, expected.Bytes())
+	}
+}
+
+func TestExtensionDescsWithUnregisteredExtensions(t *testing.T) {
 	msg := &pb.MyMessage{Count: proto.Int32(0)}
 	extdesc1 := pb.E_Ext_More
 	if descs, err := proto.ExtensionDescs(msg); len(descs) != 0 || err != nil {
@@ -100,7 +202,7 @@
 		t.Fatalf("proto.ExtensionDescs: got error %v", err)
 	}
 	sortExtDescs(descs)
-	wantDescs := []*proto.ExtensionDesc{extdesc1, &proto.ExtensionDesc{Field: extdesc2.Field}}
+	wantDescs := []*proto.ExtensionDesc{extdesc1, {Field: extdesc2.Field}}
 	if !reflect.DeepEqual(descs, wantDescs) {
 		t.Errorf("proto.ExtensionDescs(msg) sorted extension ids: got %+v, want %+v", descs, wantDescs)
 	}
@@ -200,7 +302,7 @@
 		{pb.E_DefaultSfixed64, setInt64, int64(51)},
 		{pb.E_DefaultBool, setBool, true},
 		{pb.E_DefaultBool, setBool2, true},
-		{pb.E_DefaultString, setString, "Hello, string"},
+		{pb.E_DefaultString, setString, "Hello, string,def=foo"},
 		{pb.E_DefaultBytes, setBytes, []byte("Hello, bytes")},
 		{pb.E_DefaultEnum, setEnum, pb.DefaultsMessage_ONE},
 	}
@@ -287,6 +389,44 @@
 	}
 }
 
+func TestNilMessage(t *testing.T) {
+	name := "nil interface"
+	if got, err := proto.GetExtension(nil, pb.E_Ext_More); err == nil {
+		t.Errorf("%s: got %T %v, expected to fail", name, got, got)
+	} else if !strings.Contains(err.Error(), "extendable") {
+		t.Errorf("%s: got error %v, expected not-extendable error", name, err)
+	}
+
+	// Regression tests: all functions of the Extension API
+	// used to panic when passed (*M)(nil), where M is a concrete message
+	// type.  Now they handle this gracefully as a no-op or reported error.
+	var nilMsg *pb.MyMessage
+	desc := pb.E_Ext_More
+
+	isNotExtendable := func(err error) bool {
+		return strings.Contains(fmt.Sprint(err), "not extendable")
+	}
+
+	if proto.HasExtension(nilMsg, desc) {
+		t.Error("HasExtension(nil) = true")
+	}
+
+	if _, err := proto.GetExtensions(nilMsg, []*proto.ExtensionDesc{desc}); !isNotExtendable(err) {
+		t.Errorf("GetExtensions(nil) = %q (wrong error)", err)
+	}
+
+	if _, err := proto.ExtensionDescs(nilMsg); !isNotExtendable(err) {
+		t.Errorf("ExtensionDescs(nil) = %q (wrong error)", err)
+	}
+
+	if err := proto.SetExtension(nilMsg, desc, nil); !isNotExtendable(err) {
+		t.Errorf("SetExtension(nil) = %q (wrong error)", err)
+	}
+
+	proto.ClearExtension(nilMsg, desc) // no-op
+	proto.ClearAllExtensions(nilMsg)   // no-op
+}
+
 func TestExtensionsRoundTrip(t *testing.T) {
 	msg := &pb.MyMessage{}
 	ext1 := &pb.Ext{
@@ -311,7 +451,7 @@
 	}
 	x, ok := e.(*pb.Ext)
 	if !ok {
-		t.Errorf("e has type %T, expected testdata.Ext", e)
+		t.Errorf("e has type %T, expected test_proto.Ext", e)
 	} else if *x.Data != "there" {
 		t.Errorf("SetExtension failed to overwrite, got %+v, not 'there'", x)
 	}
@@ -339,7 +479,7 @@
 	}
 	if err := proto.SetExtension(msg, pb.E_Ext_More, (*pb.Ext)(nil)); err == nil {
 		t.Error("expected SetExtension to fail due to a nil extension")
-	} else if want := "proto: SetExtension called with nil value of type *testdata.Ext"; err.Error() != want {
+	} else if want := fmt.Sprintf("proto: SetExtension called with nil value of type %T", new(pb.Ext)); err.Error() != want {
 		t.Errorf("expected error %v, got %v", want, err)
 	}
 	// Note: if the behavior of Marshal is ever changed to ignore nil extensions, update
@@ -402,8 +542,13 @@
 		if ext == nil {
 			t.Fatalf("[%s] Invalid extension", test.name)
 		}
-		if !reflect.DeepEqual(ext, test.ext) {
-			t.Errorf("[%s] Wrong value for ComplexExtension: got: %v want: %v\n", test.name, ext, test.ext)
+		if len(ext) != len(test.ext) {
+			t.Errorf("[%s] Wrong length of ComplexExtension: got: %v want: %v\n", test.name, len(ext), len(test.ext))
+		}
+		for i := range test.ext {
+			if !proto.Equal(ext[i], test.ext[i]) {
+				t.Errorf("[%s] Wrong value for ComplexExtension[%d]: got: %v want: %v\n", test.name, i, ext[i], test.ext[i])
+			}
 		}
 	}
 }
@@ -477,7 +622,7 @@
 		if ext == nil {
 			t.Fatalf("[%s] Invalid extension", test.name)
 		}
-		if !reflect.DeepEqual(*ext, want) {
+		if !proto.Equal(ext, &want) {
 			t.Errorf("[%s] Wrong value for ComplexExtension: got: %s want: %s\n", test.name, ext, &want)
 		}
 	}
@@ -509,19 +654,22 @@
 }
 
 func TestMarshalRace(t *testing.T) {
-	// unregistered extension
-	desc := &proto.ExtensionDesc{
-		ExtendedType:  (*pb.MyMessage)(nil),
-		ExtensionType: (*bool)(nil),
-		Field:         101010100,
-		Name:          "emptyextension",
-		Tag:           "varint,0,opt",
+	ext := &pb.Ext{}
+	m := &pb.MyMessage{Count: proto.Int32(4)}
+	if err := proto.SetExtension(m, pb.E_Ext_More, ext); err != nil {
+		t.Fatalf("proto.SetExtension(m, desc, true): got error %q, want nil", err)
 	}
 
-	m := &pb.MyMessage{Count: proto.Int32(4)}
-	if err := proto.SetExtension(m, desc, proto.Bool(true)); err != nil {
-		t.Errorf("proto.SetExtension(m, desc, true): got error %q, want nil", err)
+	b, err := proto.Marshal(m)
+	if err != nil {
+		t.Fatalf("Could not marshal message: %v", err)
 	}
+	if err := proto.Unmarshal(b, m); err != nil {
+		t.Fatalf("Could not unmarshal message: %v", err)
+	}
+	// after Unmarshal, the extension is in undecoded form.
+	// GetExtension will decode it lazily. Make sure this does
+	// not race against Marshal.
 
 	var g errgroup.Group
 	for n := 3; n > 0; n-- {
@@ -529,6 +677,10 @@
 			_, err := proto.Marshal(m)
 			return err
 		})
+		g.Go(func() error {
+			_, err := proto.GetExtension(m, pb.E_Ext_More)
+			return err
+		})
 	}
 	if err := g.Wait(); err != nil {
 		t.Fatal(err)
diff --git a/proto/lib.go b/proto/lib.go
index 1c22550..0e2191b 100644
--- a/proto/lib.go
+++ b/proto/lib.go
@@ -265,6 +265,7 @@
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"log"
 	"reflect"
@@ -273,6 +274,8 @@
 	"sync"
 )
 
+var errInvalidUTF8 = errors.New("proto: invalid UTF-8 string")
+
 // Message is implemented by generated protocol buffer messages.
 type Message interface {
 	Reset()
@@ -309,16 +312,7 @@
 	buf   []byte // encode/decode byte stream
 	index int    // read point
 
-	// pools of basic types to amortize allocation.
-	bools   []bool
-	uint32s []uint32
-	uint64s []uint64
-
-	// extra pools, only used with pointer_reflect.go
-	int32s   []int32
-	int64s   []int64
-	float32s []float32
-	float64s []float64
+	deterministic bool
 }
 
 // NewBuffer allocates a new Buffer and initializes its internal data to
@@ -343,6 +337,30 @@
 // Bytes returns the contents of the Buffer.
 func (p *Buffer) Bytes() []byte { return p.buf }
 
+// SetDeterministic sets whether to use deterministic serialization.
+//
+// Deterministic serialization guarantees that for a given binary, equal
+// messages will always be serialized to the same bytes. This implies:
+//
+//   - Repeated serialization of a message will return the same bytes.
+//   - Different processes of the same binary (which may be executing on
+//     different machines) will serialize equal messages to the same bytes.
+//
+// Note that the deterministic serialization is NOT canonical across
+// languages. It is not guaranteed to remain stable over time. It is unstable
+// across different builds with schema changes due to unknown fields.
+// Users who need canonical serialization (e.g., persistent storage in a
+// canonical form, fingerprinting, etc.) should define their own
+// canonicalization specification and implement their own serializer rather
+// than relying on this API.
+//
+// If deterministic serialization is requested, map entries will be sorted
+// by keys in lexographical order. This is an implementation detail and
+// subject to change.
+func (p *Buffer) SetDeterministic(deterministic bool) {
+	p.deterministic = deterministic
+}
+
 /*
  * Helper routines for simplifying the creation of optional fields of basic type.
  */
@@ -831,22 +849,12 @@
 	return sf, false, nil
 }
 
+// mapKeys returns a sort.Interface to be used for sorting the map keys.
 // Map fields may have key types of non-float scalars, strings and enums.
-// The easiest way to sort them in some deterministic order is to use fmt.
-// If this turns out to be inefficient we can always consider other options,
-// such as doing a Schwartzian transform.
-
 func mapKeys(vs []reflect.Value) sort.Interface {
-	s := mapKeySorter{
-		vs: vs,
-		// default Less function: textual comparison
-		less: func(a, b reflect.Value) bool {
-			return fmt.Sprint(a.Interface()) < fmt.Sprint(b.Interface())
-		},
-	}
+	s := mapKeySorter{vs: vs}
 
-	// Type specialization per https://developers.google.com/protocol-buffers/docs/proto#maps;
-	// numeric keys are sorted numerically.
+	// Type specialization per https://developers.google.com/protocol-buffers/docs/proto#maps.
 	if len(vs) == 0 {
 		return s
 	}
@@ -855,6 +863,12 @@
 		s.less = func(a, b reflect.Value) bool { return a.Int() < b.Int() }
 	case reflect.Uint32, reflect.Uint64:
 		s.less = func(a, b reflect.Value) bool { return a.Uint() < b.Uint() }
+	case reflect.Bool:
+		s.less = func(a, b reflect.Value) bool { return !a.Bool() && b.Bool() } // false < true
+	case reflect.String:
+		s.less = func(a, b reflect.Value) bool { return a.String() < b.String() }
+	default:
+		panic(fmt.Sprintf("unsupported map key type: %v", vs[0].Kind()))
 	}
 
 	return s
@@ -895,3 +909,13 @@
 // ProtoPackageIsVersion1 is referenced from generated protocol buffer files
 // to assert that that code is compatible with this version of the proto package.
 const ProtoPackageIsVersion1 = true
+
+// InternalMessageInfo is a type used internally by generated .pb.go files.
+// This type is not intended to be used by non-generated code.
+// This type is not subject to any compatibility guarantee.
+type InternalMessageInfo struct {
+	marshal   *marshalInfo
+	unmarshal *unmarshalInfo
+	merge     *mergeInfo
+	discard   *discardInfo
+}
diff --git a/proto/map_test.go b/proto/map_test.go
index 313e879..b1e1529 100644
--- a/proto/map_test.go
+++ b/proto/map_test.go
@@ -2,12 +2,36 @@
 
 import (
 	"fmt"
+	"reflect"
 	"testing"
 
 	"github.com/golang/protobuf/proto"
 	ppb "github.com/golang/protobuf/proto/proto3_proto"
 )
 
+func TestMap(t *testing.T) {
+	var b []byte
+	fmt.Sscanf("a2010c0a044b657931120456616c31a201130a044b657932120556616c3261120456616c32a201240a044b6579330d05000000120556616c33621a0556616c3361120456616c331505000000a20100a201260a044b657934130a07536f6d6555524c1209536f6d655469746c651a08536e69707065743114", "%x", &b)
+
+	var m ppb.Message
+	if err := proto.Unmarshal(b, &m); err != nil {
+		t.Fatalf("proto.Unmarshal error: %v", err)
+	}
+
+	got := m.StringMap
+	want := map[string]string{
+		"":     "",
+		"Key1": "Val1",
+		"Key2": "Val2",
+		"Key3": "Val3",
+		"Key4": "",
+	}
+
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("maps differ:\ngot  %#v\nwant %#v", got, want)
+	}
+}
+
 func marshalled() []byte {
 	m := &ppb.IntMaps{}
 	for i := 0; i < 1000; i++ {
diff --git a/proto/message_set.go b/proto/message_set.go
index fd982de..3b6ca41 100644
--- a/proto/message_set.go
+++ b/proto/message_set.go
@@ -42,6 +42,7 @@
 	"fmt"
 	"reflect"
 	"sort"
+	"sync"
 )
 
 // errNoMessageTypeID occurs when a protocol buffer does not have a message type ID.
@@ -94,10 +95,7 @@
 }
 
 func (ms *messageSet) Has(pb Message) bool {
-	if ms.find(pb) != nil {
-		return true
-	}
-	return false
+	return ms.find(pb) != nil
 }
 
 func (ms *messageSet) Unmarshal(pb Message) error {
@@ -150,46 +148,42 @@
 // MarshalMessageSet encodes the extension map represented by m in the message set wire format.
 // It is called by generated Marshal methods on protocol buffer messages with the message_set_wire_format option.
 func MarshalMessageSet(exts interface{}) ([]byte, error) {
-	var m map[int32]Extension
+	return marshalMessageSet(exts, false)
+}
+
+// marshaMessageSet implements above function, with the opt to turn on / off deterministic during Marshal.
+func marshalMessageSet(exts interface{}, deterministic bool) ([]byte, error) {
 	switch exts := exts.(type) {
 	case *XXX_InternalExtensions:
-		if err := encodeExtensions(exts); err != nil {
-			return nil, err
-		}
-		m, _ = exts.extensionsRead()
+		var u marshalInfo
+		siz := u.sizeMessageSet(exts)
+		b := make([]byte, 0, siz)
+		return u.appendMessageSet(b, exts, deterministic)
+
 	case map[int32]Extension:
-		if err := encodeExtensionsMap(exts); err != nil {
-			return nil, err
+		// This is an old-style extension map.
+		// Wrap it in a new-style XXX_InternalExtensions.
+		ie := XXX_InternalExtensions{
+			p: &struct {
+				mu           sync.Mutex
+				extensionMap map[int32]Extension
+			}{
+				extensionMap: exts,
+			},
 		}
-		m = exts
+
+		var u marshalInfo
+		siz := u.sizeMessageSet(&ie)
+		b := make([]byte, 0, siz)
+		return u.appendMessageSet(b, &ie, deterministic)
+
 	default:
 		return nil, errors.New("proto: not an extension map")
 	}
-
-	// Sort extension IDs to provide a deterministic encoding.
-	// See also enc_map in encode.go.
-	ids := make([]int, 0, len(m))
-	for id := range m {
-		ids = append(ids, int(id))
-	}
-	sort.Ints(ids)
-
-	ms := &messageSet{Item: make([]*_MessageSet_Item, 0, len(m))}
-	for _, id := range ids {
-		e := m[int32(id)]
-		// Remove the wire type and field number varint, as well as the length varint.
-		msg := skipVarint(skipVarint(e.enc))
-
-		ms.Item = append(ms.Item, &_MessageSet_Item{
-			TypeId:  Int32(int32(id)),
-			Message: msg,
-		})
-	}
-	return Marshal(ms)
 }
 
 // UnmarshalMessageSet decodes the extension map encoded in buf in the message set wire format.
-// It is called by generated Unmarshal methods on protocol buffer messages with the message_set_wire_format option.
+// It is called by Unmarshal methods on protocol buffer messages with the message_set_wire_format option.
 func UnmarshalMessageSet(buf []byte, exts interface{}) error {
 	var m map[int32]Extension
 	switch exts := exts.(type) {
@@ -235,7 +229,15 @@
 	var m map[int32]Extension
 	switch exts := exts.(type) {
 	case *XXX_InternalExtensions:
-		m, _ = exts.extensionsRead()
+		var mu sync.Locker
+		m, mu = exts.extensionsRead()
+		if m != nil {
+			// Keep the extensions map locked until we're done marshaling to prevent
+			// races between marshaling and unmarshaling the lazily-{en,de}coded
+			// values.
+			mu.Lock()
+			defer mu.Unlock()
+		}
 	case map[int32]Extension:
 		m = exts
 	default:
@@ -253,15 +255,16 @@
 
 	for i, id := range ids {
 		ext := m[id]
-		if i > 0 {
-			b.WriteByte(',')
-		}
-
 		msd, ok := messageSetMap[id]
 		if !ok {
 			// Unknown type; we can't render it, so skip it.
 			continue
 		}
+
+		if i > 0 && b.Len() > 1 {
+			b.WriteByte(',')
+		}
+
 		fmt.Fprintf(&b, `"[%s]":`, msd.name)
 
 		x := ext.value
diff --git a/proto/message_set_test.go b/proto/message_set_test.go
index 353a3ea..2c170c5 100644
--- a/proto/message_set_test.go
+++ b/proto/message_set_test.go
@@ -64,3 +64,14 @@
 		t.Errorf("Combined extension is %q, want %q", got, want)
 	}
 }
+
+func TestMarshalMessageSetJSON_UnknownType(t *testing.T) {
+	extMap := map[int32]Extension{12345: Extension{}}
+	got, err := MarshalMessageSetJSON(extMap)
+	if err != nil {
+		t.Fatalf("MarshalMessageSetJSON: %v", err)
+	}
+	if want := []byte("{}"); !bytes.Equal(got, want) {
+		t.Errorf("MarshalMessageSetJSON(%v) = %q, want %q", extMap, got, want)
+	}
+}
diff --git a/proto/pointer_reflect.go b/proto/pointer_reflect.go
index fb512e2..b6cad90 100644
--- a/proto/pointer_reflect.go
+++ b/proto/pointer_reflect.go
@@ -29,7 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// +build appengine js
+// +build purego appengine js
 
 // This file contains an implementation of proto field accesses using package reflect.
 // It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
@@ -38,32 +38,13 @@
 package proto
 
 import (
-	"math"
 	"reflect"
+	"sync"
 )
 
-// A structPointer is a pointer to a struct.
-type structPointer struct {
-	v reflect.Value
-}
+const unsafeAllowed = false
 
-// toStructPointer returns a structPointer equivalent to the given reflect value.
-// The reflect value must itself be a pointer to a struct.
-func toStructPointer(v reflect.Value) structPointer {
-	return structPointer{v}
-}
-
-// IsNil reports whether p is nil.
-func structPointer_IsNil(p structPointer) bool {
-	return p.v.IsNil()
-}
-
-// Interface returns the struct pointer as an interface value.
-func structPointer_Interface(p structPointer, _ reflect.Type) interface{} {
-	return p.v.Interface()
-}
-
-// A field identifies a field in a struct, accessible from a structPointer.
+// A field identifies a field in a struct, accessible from a pointer.
 // In this implementation, a field is identified by the sequence of field indices
 // passed to reflect's FieldByIndex.
 type field []int
@@ -76,409 +57,301 @@
 // invalidField is an invalid field identifier.
 var invalidField = field(nil)
 
+// zeroField is a noop when calling pointer.offset.
+var zeroField = field([]int{})
+
 // IsValid reports whether the field identifier is valid.
 func (f field) IsValid() bool { return f != nil }
 
-// field returns the given field in the struct as a reflect value.
-func structPointer_field(p structPointer, f field) reflect.Value {
-	// Special case: an extension map entry with a value of type T
-	// passes a *T to the struct-handling code with a zero field,
-	// expecting that it will be treated as equivalent to *struct{ X T },
-	// which has the same memory layout. We have to handle that case
-	// specially, because reflect will panic if we call FieldByIndex on a
-	// non-struct.
-	if f == nil {
-		return p.v.Elem()
-	}
-
-	return p.v.Elem().FieldByIndex(f)
-}
-
-// ifield returns the given field in the struct as an interface value.
-func structPointer_ifield(p structPointer, f field) interface{} {
-	return structPointer_field(p, f).Addr().Interface()
-}
-
-// Bytes returns the address of a []byte field in the struct.
-func structPointer_Bytes(p structPointer, f field) *[]byte {
-	return structPointer_ifield(p, f).(*[]byte)
-}
-
-// BytesSlice returns the address of a [][]byte field in the struct.
-func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
-	return structPointer_ifield(p, f).(*[][]byte)
-}
-
-// Bool returns the address of a *bool field in the struct.
-func structPointer_Bool(p structPointer, f field) **bool {
-	return structPointer_ifield(p, f).(**bool)
-}
-
-// BoolVal returns the address of a bool field in the struct.
-func structPointer_BoolVal(p structPointer, f field) *bool {
-	return structPointer_ifield(p, f).(*bool)
-}
-
-// BoolSlice returns the address of a []bool field in the struct.
-func structPointer_BoolSlice(p structPointer, f field) *[]bool {
-	return structPointer_ifield(p, f).(*[]bool)
-}
-
-// String returns the address of a *string field in the struct.
-func structPointer_String(p structPointer, f field) **string {
-	return structPointer_ifield(p, f).(**string)
-}
-
-// StringVal returns the address of a string field in the struct.
-func structPointer_StringVal(p structPointer, f field) *string {
-	return structPointer_ifield(p, f).(*string)
-}
-
-// StringSlice returns the address of a []string field in the struct.
-func structPointer_StringSlice(p structPointer, f field) *[]string {
-	return structPointer_ifield(p, f).(*[]string)
-}
-
-// Extensions returns the address of an extension map field in the struct.
-func structPointer_Extensions(p structPointer, f field) *XXX_InternalExtensions {
-	return structPointer_ifield(p, f).(*XXX_InternalExtensions)
-}
-
-// ExtMap returns the address of an extension map field in the struct.
-func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
-	return structPointer_ifield(p, f).(*map[int32]Extension)
-}
-
-// NewAt returns the reflect.Value for a pointer to a field in the struct.
-func structPointer_NewAt(p structPointer, f field, typ reflect.Type) reflect.Value {
-	return structPointer_field(p, f).Addr()
-}
-
-// SetStructPointer writes a *struct field in the struct.
-func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
-	structPointer_field(p, f).Set(q.v)
-}
-
-// GetStructPointer reads a *struct field in the struct.
-func structPointer_GetStructPointer(p structPointer, f field) structPointer {
-	return structPointer{structPointer_field(p, f)}
-}
-
-// StructPointerSlice the address of a []*struct field in the struct.
-func structPointer_StructPointerSlice(p structPointer, f field) structPointerSlice {
-	return structPointerSlice{structPointer_field(p, f)}
-}
-
-// A structPointerSlice represents the address of a slice of pointers to structs
-// (themselves messages or groups). That is, v.Type() is *[]*struct{...}.
-type structPointerSlice struct {
+// The pointer type is for the table-driven decoder.
+// The implementation here uses a reflect.Value of pointer type to
+// create a generic pointer. In pointer_unsafe.go we use unsafe
+// instead of reflect to implement the same (but faster) interface.
+type pointer struct {
 	v reflect.Value
 }
 
-func (p structPointerSlice) Len() int                  { return p.v.Len() }
-func (p structPointerSlice) Index(i int) structPointer { return structPointer{p.v.Index(i)} }
-func (p structPointerSlice) Append(q structPointer) {
-	p.v.Set(reflect.Append(p.v, q.v))
+// toPointer converts an interface of pointer type to a pointer
+// that points to the same target.
+func toPointer(i *Message) pointer {
+	return pointer{v: reflect.ValueOf(*i)}
 }
 
-var (
-	int32Type   = reflect.TypeOf(int32(0))
-	uint32Type  = reflect.TypeOf(uint32(0))
-	float32Type = reflect.TypeOf(float32(0))
-	int64Type   = reflect.TypeOf(int64(0))
-	uint64Type  = reflect.TypeOf(uint64(0))
-	float64Type = reflect.TypeOf(float64(0))
-)
-
-// A word32 represents a field of type *int32, *uint32, *float32, or *enum.
-// That is, v.Type() is *int32, *uint32, *float32, or *enum and v is assignable.
-type word32 struct {
-	v reflect.Value
+// toAddrPointer converts an interface to a pointer that points to
+// the interface data.
+func toAddrPointer(i *interface{}, isptr bool) pointer {
+	v := reflect.ValueOf(*i)
+	u := reflect.New(v.Type())
+	u.Elem().Set(v)
+	return pointer{v: u}
 }
 
-// IsNil reports whether p is nil.
-func word32_IsNil(p word32) bool {
+// valToPointer converts v to a pointer.  v must be of pointer type.
+func valToPointer(v reflect.Value) pointer {
+	return pointer{v: v}
+}
+
+// offset converts from a pointer to a structure to a pointer to
+// one of its fields.
+func (p pointer) offset(f field) pointer {
+	return pointer{v: p.v.Elem().FieldByIndex(f).Addr()}
+}
+
+func (p pointer) isNil() bool {
 	return p.v.IsNil()
 }
 
-// Set sets p to point at a newly allocated word with bits set to x.
-func word32_Set(p word32, o *Buffer, x uint32) {
-	t := p.v.Type().Elem()
-	switch t {
-	case int32Type:
-		if len(o.int32s) == 0 {
-			o.int32s = make([]int32, uint32PoolSize)
-		}
-		o.int32s[0] = int32(x)
-		p.v.Set(reflect.ValueOf(&o.int32s[0]))
-		o.int32s = o.int32s[1:]
-		return
-	case uint32Type:
-		if len(o.uint32s) == 0 {
-			o.uint32s = make([]uint32, uint32PoolSize)
-		}
-		o.uint32s[0] = x
-		p.v.Set(reflect.ValueOf(&o.uint32s[0]))
-		o.uint32s = o.uint32s[1:]
-		return
-	case float32Type:
-		if len(o.float32s) == 0 {
-			o.float32s = make([]float32, uint32PoolSize)
-		}
-		o.float32s[0] = math.Float32frombits(x)
-		p.v.Set(reflect.ValueOf(&o.float32s[0]))
-		o.float32s = o.float32s[1:]
-		return
-	}
-
-	// must be enum
-	p.v.Set(reflect.New(t))
-	p.v.Elem().SetInt(int64(int32(x)))
-}
-
-// Get gets the bits pointed at by p, as a uint32.
-func word32_Get(p word32) uint32 {
-	elem := p.v.Elem()
-	switch elem.Kind() {
-	case reflect.Int32:
-		return uint32(elem.Int())
-	case reflect.Uint32:
-		return uint32(elem.Uint())
-	case reflect.Float32:
-		return math.Float32bits(float32(elem.Float()))
-	}
-	panic("unreachable")
-}
-
-// Word32 returns a reference to a *int32, *uint32, *float32, or *enum field in the struct.
-func structPointer_Word32(p structPointer, f field) word32 {
-	return word32{structPointer_field(p, f)}
-}
-
-// A word32Val represents a field of type int32, uint32, float32, or enum.
-// That is, v.Type() is int32, uint32, float32, or enum and v is assignable.
-type word32Val struct {
-	v reflect.Value
-}
-
-// Set sets *p to x.
-func word32Val_Set(p word32Val, x uint32) {
-	switch p.v.Type() {
-	case int32Type:
-		p.v.SetInt(int64(x))
-		return
-	case uint32Type:
-		p.v.SetUint(uint64(x))
-		return
-	case float32Type:
-		p.v.SetFloat(float64(math.Float32frombits(x)))
-		return
-	}
-
-	// must be enum
-	p.v.SetInt(int64(int32(x)))
-}
-
-// Get gets the bits pointed at by p, as a uint32.
-func word32Val_Get(p word32Val) uint32 {
-	elem := p.v
-	switch elem.Kind() {
-	case reflect.Int32:
-		return uint32(elem.Int())
-	case reflect.Uint32:
-		return uint32(elem.Uint())
-	case reflect.Float32:
-		return math.Float32bits(float32(elem.Float()))
-	}
-	panic("unreachable")
-}
-
-// Word32Val returns a reference to a int32, uint32, float32, or enum field in the struct.
-func structPointer_Word32Val(p structPointer, f field) word32Val {
-	return word32Val{structPointer_field(p, f)}
-}
-
-// A word32Slice is a slice of 32-bit values.
-// That is, v.Type() is []int32, []uint32, []float32, or []enum.
-type word32Slice struct {
-	v reflect.Value
-}
-
-func (p word32Slice) Append(x uint32) {
-	n, m := p.v.Len(), p.v.Cap()
+// grow updates the slice s in place to make it one element longer.
+// s must be addressable.
+// Returns the (addressable) new element.
+func grow(s reflect.Value) reflect.Value {
+	n, m := s.Len(), s.Cap()
 	if n < m {
-		p.v.SetLen(n + 1)
+		s.SetLen(n + 1)
 	} else {
-		t := p.v.Type().Elem()
-		p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
+		s.Set(reflect.Append(s, reflect.Zero(s.Type().Elem())))
 	}
-	elem := p.v.Index(n)
-	switch elem.Kind() {
-	case reflect.Int32:
-		elem.SetInt(int64(int32(x)))
-	case reflect.Uint32:
-		elem.SetUint(uint64(x))
-	case reflect.Float32:
-		elem.SetFloat(float64(math.Float32frombits(x)))
+	return s.Index(n)
+}
+
+func (p pointer) toInt64() *int64 {
+	return p.v.Interface().(*int64)
+}
+func (p pointer) toInt64Ptr() **int64 {
+	return p.v.Interface().(**int64)
+}
+func (p pointer) toInt64Slice() *[]int64 {
+	return p.v.Interface().(*[]int64)
+}
+
+var int32ptr = reflect.TypeOf((*int32)(nil))
+
+func (p pointer) toInt32() *int32 {
+	return p.v.Convert(int32ptr).Interface().(*int32)
+}
+
+// The toInt32Ptr/Slice methods don't work because of enums.
+// Instead, we must use set/get methods for the int32ptr/slice case.
+/*
+	func (p pointer) toInt32Ptr() **int32 {
+		return p.v.Interface().(**int32)
+}
+	func (p pointer) toInt32Slice() *[]int32 {
+		return p.v.Interface().(*[]int32)
+}
+*/
+func (p pointer) getInt32Ptr() *int32 {
+	if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
+		// raw int32 type
+		return p.v.Elem().Interface().(*int32)
 	}
+	// an enum
+	return p.v.Elem().Convert(int32PtrType).Interface().(*int32)
+}
+func (p pointer) setInt32Ptr(v int32) {
+	// Allocate value in a *int32. Possibly convert that to a *enum.
+	// Then assign it to a **int32 or **enum.
+	// Note: we can convert *int32 to *enum, but we can't convert
+	// **int32 to **enum!
+	p.v.Elem().Set(reflect.ValueOf(&v).Convert(p.v.Type().Elem()))
 }
 
-func (p word32Slice) Len() int {
-	return p.v.Len()
-}
-
-func (p word32Slice) Index(i int) uint32 {
-	elem := p.v.Index(i)
-	switch elem.Kind() {
-	case reflect.Int32:
-		return uint32(elem.Int())
-	case reflect.Uint32:
-		return uint32(elem.Uint())
-	case reflect.Float32:
-		return math.Float32bits(float32(elem.Float()))
+// getInt32Slice copies []int32 from p as a new slice.
+// This behavior differs from the implementation in pointer_unsafe.go.
+func (p pointer) getInt32Slice() []int32 {
+	if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
+		// raw int32 type
+		return p.v.Elem().Interface().([]int32)
 	}
-	panic("unreachable")
+	// an enum
+	// Allocate a []int32, then assign []enum's values into it.
+	// Note: we can't convert []enum to []int32.
+	slice := p.v.Elem()
+	s := make([]int32, slice.Len())
+	for i := 0; i < slice.Len(); i++ {
+		s[i] = int32(slice.Index(i).Int())
+	}
+	return s
 }
 
-// Word32Slice returns a reference to a []int32, []uint32, []float32, or []enum field in the struct.
-func structPointer_Word32Slice(p structPointer, f field) word32Slice {
-	return word32Slice{structPointer_field(p, f)}
-}
-
-// word64 is like word32 but for 64-bit values.
-type word64 struct {
-	v reflect.Value
-}
-
-func word64_Set(p word64, o *Buffer, x uint64) {
-	t := p.v.Type().Elem()
-	switch t {
-	case int64Type:
-		if len(o.int64s) == 0 {
-			o.int64s = make([]int64, uint64PoolSize)
-		}
-		o.int64s[0] = int64(x)
-		p.v.Set(reflect.ValueOf(&o.int64s[0]))
-		o.int64s = o.int64s[1:]
-		return
-	case uint64Type:
-		if len(o.uint64s) == 0 {
-			o.uint64s = make([]uint64, uint64PoolSize)
-		}
-		o.uint64s[0] = x
-		p.v.Set(reflect.ValueOf(&o.uint64s[0]))
-		o.uint64s = o.uint64s[1:]
-		return
-	case float64Type:
-		if len(o.float64s) == 0 {
-			o.float64s = make([]float64, uint64PoolSize)
-		}
-		o.float64s[0] = math.Float64frombits(x)
-		p.v.Set(reflect.ValueOf(&o.float64s[0]))
-		o.float64s = o.float64s[1:]
+// setInt32Slice copies []int32 into p as a new slice.
+// This behavior differs from the implementation in pointer_unsafe.go.
+func (p pointer) setInt32Slice(v []int32) {
+	if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
+		// raw int32 type
+		p.v.Elem().Set(reflect.ValueOf(v))
 		return
 	}
-	panic("unreachable")
-}
-
-func word64_IsNil(p word64) bool {
-	return p.v.IsNil()
-}
-
-func word64_Get(p word64) uint64 {
-	elem := p.v.Elem()
-	switch elem.Kind() {
-	case reflect.Int64:
-		return uint64(elem.Int())
-	case reflect.Uint64:
-		return elem.Uint()
-	case reflect.Float64:
-		return math.Float64bits(elem.Float())
+	// an enum
+	// Allocate a []enum, then assign []int32's values into it.
+	// Note: we can't convert []enum to []int32.
+	slice := reflect.MakeSlice(p.v.Type().Elem(), len(v), cap(v))
+	for i, x := range v {
+		slice.Index(i).SetInt(int64(x))
 	}
-	panic("unreachable")
+	p.v.Elem().Set(slice)
+}
+func (p pointer) appendInt32Slice(v int32) {
+	grow(p.v.Elem()).SetInt(int64(v))
 }
 
-func structPointer_Word64(p structPointer, f field) word64 {
-	return word64{structPointer_field(p, f)}
+func (p pointer) toUint64() *uint64 {
+	return p.v.Interface().(*uint64)
+}
+func (p pointer) toUint64Ptr() **uint64 {
+	return p.v.Interface().(**uint64)
+}
+func (p pointer) toUint64Slice() *[]uint64 {
+	return p.v.Interface().(*[]uint64)
+}
+func (p pointer) toUint32() *uint32 {
+	return p.v.Interface().(*uint32)
+}
+func (p pointer) toUint32Ptr() **uint32 {
+	return p.v.Interface().(**uint32)
+}
+func (p pointer) toUint32Slice() *[]uint32 {
+	return p.v.Interface().(*[]uint32)
+}
+func (p pointer) toBool() *bool {
+	return p.v.Interface().(*bool)
+}
+func (p pointer) toBoolPtr() **bool {
+	return p.v.Interface().(**bool)
+}
+func (p pointer) toBoolSlice() *[]bool {
+	return p.v.Interface().(*[]bool)
+}
+func (p pointer) toFloat64() *float64 {
+	return p.v.Interface().(*float64)
+}
+func (p pointer) toFloat64Ptr() **float64 {
+	return p.v.Interface().(**float64)
+}
+func (p pointer) toFloat64Slice() *[]float64 {
+	return p.v.Interface().(*[]float64)
+}
+func (p pointer) toFloat32() *float32 {
+	return p.v.Interface().(*float32)
+}
+func (p pointer) toFloat32Ptr() **float32 {
+	return p.v.Interface().(**float32)
+}
+func (p pointer) toFloat32Slice() *[]float32 {
+	return p.v.Interface().(*[]float32)
+}
+func (p pointer) toString() *string {
+	return p.v.Interface().(*string)
+}
+func (p pointer) toStringPtr() **string {
+	return p.v.Interface().(**string)
+}
+func (p pointer) toStringSlice() *[]string {
+	return p.v.Interface().(*[]string)
+}
+func (p pointer) toBytes() *[]byte {
+	return p.v.Interface().(*[]byte)
+}
+func (p pointer) toBytesSlice() *[][]byte {
+	return p.v.Interface().(*[][]byte)
+}
+func (p pointer) toExtensions() *XXX_InternalExtensions {
+	return p.v.Interface().(*XXX_InternalExtensions)
+}
+func (p pointer) toOldExtensions() *map[int32]Extension {
+	return p.v.Interface().(*map[int32]Extension)
+}
+func (p pointer) getPointer() pointer {
+	return pointer{v: p.v.Elem()}
+}
+func (p pointer) setPointer(q pointer) {
+	p.v.Elem().Set(q.v)
+}
+func (p pointer) appendPointer(q pointer) {
+	grow(p.v.Elem()).Set(q.v)
 }
 
-// word64Val is like word32Val but for 64-bit values.
-type word64Val struct {
-	v reflect.Value
+// getPointerSlice copies []*T from p as a new []pointer.
+// This behavior differs from the implementation in pointer_unsafe.go.
+func (p pointer) getPointerSlice() []pointer {
+	if p.v.IsNil() {
+		return nil
+	}
+	n := p.v.Elem().Len()
+	s := make([]pointer, n)
+	for i := 0; i < n; i++ {
+		s[i] = pointer{v: p.v.Elem().Index(i)}
+	}
+	return s
 }
 
-func word64Val_Set(p word64Val, o *Buffer, x uint64) {
-	switch p.v.Type() {
-	case int64Type:
-		p.v.SetInt(int64(x))
-		return
-	case uint64Type:
-		p.v.SetUint(x)
-		return
-	case float64Type:
-		p.v.SetFloat(math.Float64frombits(x))
+// setPointerSlice copies []pointer into p as a new []*T.
+// This behavior differs from the implementation in pointer_unsafe.go.
+func (p pointer) setPointerSlice(v []pointer) {
+	if v == nil {
+		p.v.Elem().Set(reflect.New(p.v.Elem().Type()).Elem())
 		return
 	}
-	panic("unreachable")
-}
-
-func word64Val_Get(p word64Val) uint64 {
-	elem := p.v
-	switch elem.Kind() {
-	case reflect.Int64:
-		return uint64(elem.Int())
-	case reflect.Uint64:
-		return elem.Uint()
-	case reflect.Float64:
-		return math.Float64bits(elem.Float())
+	s := reflect.MakeSlice(p.v.Elem().Type(), 0, len(v))
+	for _, p := range v {
+		s = reflect.Append(s, p.v)
 	}
-	panic("unreachable")
+	p.v.Elem().Set(s)
 }
 
-func structPointer_Word64Val(p structPointer, f field) word64Val {
-	return word64Val{structPointer_field(p, f)}
-}
-
-type word64Slice struct {
-	v reflect.Value
-}
-
-func (p word64Slice) Append(x uint64) {
-	n, m := p.v.Len(), p.v.Cap()
-	if n < m {
-		p.v.SetLen(n + 1)
-	} else {
-		t := p.v.Type().Elem()
-		p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
+// getInterfacePointer returns a pointer that points to the
+// interface data of the interface pointed by p.
+func (p pointer) getInterfacePointer() pointer {
+	if p.v.Elem().IsNil() {
+		return pointer{v: p.v.Elem()}
 	}
-	elem := p.v.Index(n)
-	switch elem.Kind() {
-	case reflect.Int64:
-		elem.SetInt(int64(int64(x)))
-	case reflect.Uint64:
-		elem.SetUint(uint64(x))
-	case reflect.Float64:
-		elem.SetFloat(float64(math.Float64frombits(x)))
-	}
+	return pointer{v: p.v.Elem().Elem().Elem().Field(0).Addr()} // *interface -> interface -> *struct -> struct
 }
 
-func (p word64Slice) Len() int {
-	return p.v.Len()
+func (p pointer) asPointerTo(t reflect.Type) reflect.Value {
+	// TODO: check that p.v.Type().Elem() == t?
+	return p.v
 }
 
-func (p word64Slice) Index(i int) uint64 {
-	elem := p.v.Index(i)
-	switch elem.Kind() {
-	case reflect.Int64:
-		return uint64(elem.Int())
-	case reflect.Uint64:
-		return uint64(elem.Uint())
-	case reflect.Float64:
-		return math.Float64bits(float64(elem.Float()))
-	}
-	panic("unreachable")
+func atomicLoadUnmarshalInfo(p **unmarshalInfo) *unmarshalInfo {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	return *p
+}
+func atomicStoreUnmarshalInfo(p **unmarshalInfo, v *unmarshalInfo) {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	*p = v
+}
+func atomicLoadMarshalInfo(p **marshalInfo) *marshalInfo {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	return *p
+}
+func atomicStoreMarshalInfo(p **marshalInfo, v *marshalInfo) {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	*p = v
+}
+func atomicLoadMergeInfo(p **mergeInfo) *mergeInfo {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	return *p
+}
+func atomicStoreMergeInfo(p **mergeInfo, v *mergeInfo) {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	*p = v
+}
+func atomicLoadDiscardInfo(p **discardInfo) *discardInfo {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	return *p
+}
+func atomicStoreDiscardInfo(p **discardInfo, v *discardInfo) {
+	atomicLock.Lock()
+	defer atomicLock.Unlock()
+	*p = v
 }
 
-func structPointer_Word64Slice(p structPointer, f field) word64Slice {
-	return word64Slice{structPointer_field(p, f)}
-}
+var atomicLock sync.Mutex
diff --git a/proto/pointer_unsafe.go b/proto/pointer_unsafe.go
index 6b5567d..d55a335 100644
--- a/proto/pointer_unsafe.go
+++ b/proto/pointer_unsafe.go
@@ -29,7 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// +build !appengine,!js
+// +build !purego,!appengine,!js
 
 // This file contains the implementation of the proto field accesses using package unsafe.
 
@@ -37,38 +37,13 @@
 
 import (
 	"reflect"
+	"sync/atomic"
 	"unsafe"
 )
 
-// NOTE: These type_Foo functions would more idiomatically be methods,
-// but Go does not allow methods on pointer types, and we must preserve
-// some pointer type for the garbage collector. We use these
-// funcs with clunky names as our poor approximation to methods.
-//
-// An alternative would be
-//	type structPointer struct { p unsafe.Pointer }
-// but that does not registerize as well.
+const unsafeAllowed = true
 
-// A structPointer is a pointer to a struct.
-type structPointer unsafe.Pointer
-
-// toStructPointer returns a structPointer equivalent to the given reflect value.
-func toStructPointer(v reflect.Value) structPointer {
-	return structPointer(unsafe.Pointer(v.Pointer()))
-}
-
-// IsNil reports whether p is nil.
-func structPointer_IsNil(p structPointer) bool {
-	return p == nil
-}
-
-// Interface returns the struct pointer, assumed to have element type t,
-// as an interface value.
-func structPointer_Interface(p structPointer, t reflect.Type) interface{} {
-	return reflect.NewAt(t, unsafe.Pointer(p)).Interface()
-}
-
-// A field identifies a field in a struct, accessible from a structPointer.
+// A field identifies a field in a struct, accessible from a pointer.
 // In this implementation, a field is identified by its byte offset from the start of the struct.
 type field uintptr
 
@@ -80,191 +55,254 @@
 // invalidField is an invalid field identifier.
 const invalidField = ^field(0)
 
+// zeroField is a noop when calling pointer.offset.
+const zeroField = field(0)
+
 // IsValid reports whether the field identifier is valid.
 func (f field) IsValid() bool {
-	return f != ^field(0)
+	return f != invalidField
 }
 
-// Bytes returns the address of a []byte field in the struct.
-func structPointer_Bytes(p structPointer, f field) *[]byte {
-	return (*[]byte)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+// The pointer type below is for the new table-driven encoder/decoder.
+// The implementation here uses unsafe.Pointer to create a generic pointer.
+// In pointer_reflect.go we use reflect instead of unsafe to implement
+// the same (but slower) interface.
+type pointer struct {
+	p unsafe.Pointer
 }
 
-// BytesSlice returns the address of a [][]byte field in the struct.
-func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
-	return (*[][]byte)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+// size of pointer
+var ptrSize = unsafe.Sizeof(uintptr(0))
+
+// toPointer converts an interface of pointer type to a pointer
+// that points to the same target.
+func toPointer(i *Message) pointer {
+	// Super-tricky - read pointer out of data word of interface value.
+	// Saves ~25ns over the equivalent:
+	// return valToPointer(reflect.ValueOf(*i))
+	return pointer{p: (*[2]unsafe.Pointer)(unsafe.Pointer(i))[1]}
 }
 
-// Bool returns the address of a *bool field in the struct.
-func structPointer_Bool(p structPointer, f field) **bool {
-	return (**bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// BoolVal returns the address of a bool field in the struct.
-func structPointer_BoolVal(p structPointer, f field) *bool {
-	return (*bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// BoolSlice returns the address of a []bool field in the struct.
-func structPointer_BoolSlice(p structPointer, f field) *[]bool {
-	return (*[]bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// String returns the address of a *string field in the struct.
-func structPointer_String(p structPointer, f field) **string {
-	return (**string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// StringVal returns the address of a string field in the struct.
-func structPointer_StringVal(p structPointer, f field) *string {
-	return (*string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// StringSlice returns the address of a []string field in the struct.
-func structPointer_StringSlice(p structPointer, f field) *[]string {
-	return (*[]string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// ExtMap returns the address of an extension map field in the struct.
-func structPointer_Extensions(p structPointer, f field) *XXX_InternalExtensions {
-	return (*XXX_InternalExtensions)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
-	return (*map[int32]Extension)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// NewAt returns the reflect.Value for a pointer to a field in the struct.
-func structPointer_NewAt(p structPointer, f field, typ reflect.Type) reflect.Value {
-	return reflect.NewAt(typ, unsafe.Pointer(uintptr(p)+uintptr(f)))
-}
-
-// SetStructPointer writes a *struct field in the struct.
-func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
-	*(*structPointer)(unsafe.Pointer(uintptr(p) + uintptr(f))) = q
-}
-
-// GetStructPointer reads a *struct field in the struct.
-func structPointer_GetStructPointer(p structPointer, f field) structPointer {
-	return *(*structPointer)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// StructPointerSlice the address of a []*struct field in the struct.
-func structPointer_StructPointerSlice(p structPointer, f field) *structPointerSlice {
-	return (*structPointerSlice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// A structPointerSlice represents a slice of pointers to structs (themselves submessages or groups).
-type structPointerSlice []structPointer
-
-func (v *structPointerSlice) Len() int                  { return len(*v) }
-func (v *structPointerSlice) Index(i int) structPointer { return (*v)[i] }
-func (v *structPointerSlice) Append(p structPointer)    { *v = append(*v, p) }
-
-// A word32 is the address of a "pointer to 32-bit value" field.
-type word32 **uint32
-
-// IsNil reports whether *v is nil.
-func word32_IsNil(p word32) bool {
-	return *p == nil
-}
-
-// Set sets *v to point at a newly allocated word set to x.
-func word32_Set(p word32, o *Buffer, x uint32) {
-	if len(o.uint32s) == 0 {
-		o.uint32s = make([]uint32, uint32PoolSize)
+// toAddrPointer converts an interface to a pointer that points to
+// the interface data.
+func toAddrPointer(i *interface{}, isptr bool) pointer {
+	// Super-tricky - read or get the address of data word of interface value.
+	if isptr {
+		// The interface is of pointer type, thus it is a direct interface.
+		// The data word is the pointer data itself. We take its address.
+		return pointer{p: unsafe.Pointer(uintptr(unsafe.Pointer(i)) + ptrSize)}
 	}
-	o.uint32s[0] = x
-	*p = &o.uint32s[0]
-	o.uint32s = o.uint32s[1:]
+	// The interface is not of pointer type. The data word is the pointer
+	// to the data.
+	return pointer{p: (*[2]unsafe.Pointer)(unsafe.Pointer(i))[1]}
 }
 
-// Get gets the value pointed at by *v.
-func word32_Get(p word32) uint32 {
-	return **p
+// valToPointer converts v to a pointer. v must be of pointer type.
+func valToPointer(v reflect.Value) pointer {
+	return pointer{p: unsafe.Pointer(v.Pointer())}
 }
 
-// Word32 returns the address of a *int32, *uint32, *float32, or *enum field in the struct.
-func structPointer_Word32(p structPointer, f field) word32 {
-	return word32((**uint32)(unsafe.Pointer(uintptr(p) + uintptr(f))))
+// offset converts from a pointer to a structure to a pointer to
+// one of its fields.
+func (p pointer) offset(f field) pointer {
+	// For safety, we should panic if !f.IsValid, however calling panic causes
+	// this to no longer be inlineable, which is a serious performance cost.
+	/*
+		if !f.IsValid() {
+			panic("invalid field")
+		}
+	*/
+	return pointer{p: unsafe.Pointer(uintptr(p.p) + uintptr(f))}
 }
 
-// A word32Val is the address of a 32-bit value field.
-type word32Val *uint32
-
-// Set sets *p to x.
-func word32Val_Set(p word32Val, x uint32) {
-	*p = x
+func (p pointer) isNil() bool {
+	return p.p == nil
 }
 
-// Get gets the value pointed at by p.
-func word32Val_Get(p word32Val) uint32 {
-	return *p
+func (p pointer) toInt64() *int64 {
+	return (*int64)(p.p)
+}
+func (p pointer) toInt64Ptr() **int64 {
+	return (**int64)(p.p)
+}
+func (p pointer) toInt64Slice() *[]int64 {
+	return (*[]int64)(p.p)
+}
+func (p pointer) toInt32() *int32 {
+	return (*int32)(p.p)
 }
 
-// Word32Val returns the address of a *int32, *uint32, *float32, or *enum field in the struct.
-func structPointer_Word32Val(p structPointer, f field) word32Val {
-	return word32Val((*uint32)(unsafe.Pointer(uintptr(p) + uintptr(f))))
-}
-
-// A word32Slice is a slice of 32-bit values.
-type word32Slice []uint32
-
-func (v *word32Slice) Append(x uint32)    { *v = append(*v, x) }
-func (v *word32Slice) Len() int           { return len(*v) }
-func (v *word32Slice) Index(i int) uint32 { return (*v)[i] }
-
-// Word32Slice returns the address of a []int32, []uint32, []float32, or []enum field in the struct.
-func structPointer_Word32Slice(p structPointer, f field) *word32Slice {
-	return (*word32Slice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
-}
-
-// word64 is like word32 but for 64-bit values.
-type word64 **uint64
-
-func word64_Set(p word64, o *Buffer, x uint64) {
-	if len(o.uint64s) == 0 {
-		o.uint64s = make([]uint64, uint64PoolSize)
+// See pointer_reflect.go for why toInt32Ptr/Slice doesn't exist.
+/*
+	func (p pointer) toInt32Ptr() **int32 {
+		return (**int32)(p.p)
 	}
-	o.uint64s[0] = x
-	*p = &o.uint64s[0]
-	o.uint64s = o.uint64s[1:]
+	func (p pointer) toInt32Slice() *[]int32 {
+		return (*[]int32)(p.p)
+	}
+*/
+func (p pointer) getInt32Ptr() *int32 {
+	return *(**int32)(p.p)
+}
+func (p pointer) setInt32Ptr(v int32) {
+	*(**int32)(p.p) = &v
 }
 
-func word64_IsNil(p word64) bool {
-	return *p == nil
+// getInt32Slice loads a []int32 from p.
+// The value returned is aliased with the original slice.
+// This behavior differs from the implementation in pointer_reflect.go.
+func (p pointer) getInt32Slice() []int32 {
+	return *(*[]int32)(p.p)
 }
 
-func word64_Get(p word64) uint64 {
-	return **p
+// setInt32Slice stores a []int32 to p.
+// The value set is aliased with the input slice.
+// This behavior differs from the implementation in pointer_reflect.go.
+func (p pointer) setInt32Slice(v []int32) {
+	*(*[]int32)(p.p) = v
 }
 
-func structPointer_Word64(p structPointer, f field) word64 {
-	return word64((**uint64)(unsafe.Pointer(uintptr(p) + uintptr(f))))
+// TODO: Can we get rid of appendInt32Slice and use setInt32Slice instead?
+func (p pointer) appendInt32Slice(v int32) {
+	s := (*[]int32)(p.p)
+	*s = append(*s, v)
 }
 
-// word64Val is like word32Val but for 64-bit values.
-type word64Val *uint64
-
-func word64Val_Set(p word64Val, o *Buffer, x uint64) {
-	*p = x
+func (p pointer) toUint64() *uint64 {
+	return (*uint64)(p.p)
+}
+func (p pointer) toUint64Ptr() **uint64 {
+	return (**uint64)(p.p)
+}
+func (p pointer) toUint64Slice() *[]uint64 {
+	return (*[]uint64)(p.p)
+}
+func (p pointer) toUint32() *uint32 {
+	return (*uint32)(p.p)
+}
+func (p pointer) toUint32Ptr() **uint32 {
+	return (**uint32)(p.p)
+}
+func (p pointer) toUint32Slice() *[]uint32 {
+	return (*[]uint32)(p.p)
+}
+func (p pointer) toBool() *bool {
+	return (*bool)(p.p)
+}
+func (p pointer) toBoolPtr() **bool {
+	return (**bool)(p.p)
+}
+func (p pointer) toBoolSlice() *[]bool {
+	return (*[]bool)(p.p)
+}
+func (p pointer) toFloat64() *float64 {
+	return (*float64)(p.p)
+}
+func (p pointer) toFloat64Ptr() **float64 {
+	return (**float64)(p.p)
+}
+func (p pointer) toFloat64Slice() *[]float64 {
+	return (*[]float64)(p.p)
+}
+func (p pointer) toFloat32() *float32 {
+	return (*float32)(p.p)
+}
+func (p pointer) toFloat32Ptr() **float32 {
+	return (**float32)(p.p)
+}
+func (p pointer) toFloat32Slice() *[]float32 {
+	return (*[]float32)(p.p)
+}
+func (p pointer) toString() *string {
+	return (*string)(p.p)
+}
+func (p pointer) toStringPtr() **string {
+	return (**string)(p.p)
+}
+func (p pointer) toStringSlice() *[]string {
+	return (*[]string)(p.p)
+}
+func (p pointer) toBytes() *[]byte {
+	return (*[]byte)(p.p)
+}
+func (p pointer) toBytesSlice() *[][]byte {
+	return (*[][]byte)(p.p)
+}
+func (p pointer) toExtensions() *XXX_InternalExtensions {
+	return (*XXX_InternalExtensions)(p.p)
+}
+func (p pointer) toOldExtensions() *map[int32]Extension {
+	return (*map[int32]Extension)(p.p)
 }
 
-func word64Val_Get(p word64Val) uint64 {
-	return *p
+// getPointerSlice loads []*T from p as a []pointer.
+// The value returned is aliased with the original slice.
+// This behavior differs from the implementation in pointer_reflect.go.
+func (p pointer) getPointerSlice() []pointer {
+	// Super-tricky - p should point to a []*T where T is a
+	// message type. We load it as []pointer.
+	return *(*[]pointer)(p.p)
 }
 
-func structPointer_Word64Val(p structPointer, f field) word64Val {
-	return word64Val((*uint64)(unsafe.Pointer(uintptr(p) + uintptr(f))))
+// setPointerSlice stores []pointer into p as a []*T.
+// The value set is aliased with the input slice.
+// This behavior differs from the implementation in pointer_reflect.go.
+func (p pointer) setPointerSlice(v []pointer) {
+	// Super-tricky - p should point to a []*T where T is a
+	// message type. We store it as []pointer.
+	*(*[]pointer)(p.p) = v
 }
 
-// word64Slice is like word32Slice but for 64-bit values.
-type word64Slice []uint64
+// getPointer loads the pointer at p and returns it.
+func (p pointer) getPointer() pointer {
+	return pointer{p: *(*unsafe.Pointer)(p.p)}
+}
 
-func (v *word64Slice) Append(x uint64)    { *v = append(*v, x) }
-func (v *word64Slice) Len() int           { return len(*v) }
-func (v *word64Slice) Index(i int) uint64 { return (*v)[i] }
+// setPointer stores the pointer q at p.
+func (p pointer) setPointer(q pointer) {
+	*(*unsafe.Pointer)(p.p) = q.p
+}
 
-func structPointer_Word64Slice(p structPointer, f field) *word64Slice {
-	return (*word64Slice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+// append q to the slice pointed to by p.
+func (p pointer) appendPointer(q pointer) {
+	s := (*[]unsafe.Pointer)(p.p)
+	*s = append(*s, q.p)
+}
+
+// getInterfacePointer returns a pointer that points to the
+// interface data of the interface pointed by p.
+func (p pointer) getInterfacePointer() pointer {
+	// Super-tricky - read pointer out of data word of interface value.
+	return pointer{p: (*(*[2]unsafe.Pointer)(p.p))[1]}
+}
+
+// asPointerTo returns a reflect.Value that is a pointer to an
+// object of type t stored at p.
+func (p pointer) asPointerTo(t reflect.Type) reflect.Value {
+	return reflect.NewAt(t, p.p)
+}
+
+func atomicLoadUnmarshalInfo(p **unmarshalInfo) *unmarshalInfo {
+	return (*unmarshalInfo)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(p))))
+}
+func atomicStoreUnmarshalInfo(p **unmarshalInfo, v *unmarshalInfo) {
+	atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(p)), unsafe.Pointer(v))
+}
+func atomicLoadMarshalInfo(p **marshalInfo) *marshalInfo {
+	return (*marshalInfo)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(p))))
+}
+func atomicStoreMarshalInfo(p **marshalInfo, v *marshalInfo) {
+	atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(p)), unsafe.Pointer(v))
+}
+func atomicLoadMergeInfo(p **mergeInfo) *mergeInfo {
+	return (*mergeInfo)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(p))))
+}
+func atomicStoreMergeInfo(p **mergeInfo, v *mergeInfo) {
+	atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(p)), unsafe.Pointer(v))
+}
+func atomicLoadDiscardInfo(p **discardInfo) *discardInfo {
+	return (*discardInfo)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(p))))
+}
+func atomicStoreDiscardInfo(p **discardInfo, v *discardInfo) {
+	atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(p)), unsafe.Pointer(v))
 }
diff --git a/proto/properties.go b/proto/properties.go
index ec2289c..f710ada 100644
--- a/proto/properties.go
+++ b/proto/properties.go
@@ -58,42 +58,6 @@
 	WireFixed32    = 5
 )
 
-const startSize = 10 // initial slice/string sizes
-
-// Encoders are defined in encode.go
-// An encoder outputs the full representation of a field, including its
-// tag and encoder type.
-type encoder func(p *Buffer, prop *Properties, base structPointer) error
-
-// A valueEncoder encodes a single integer in a particular encoding.
-type valueEncoder func(o *Buffer, x uint64) error
-
-// Sizers are defined in encode.go
-// A sizer returns the encoded size of a field, including its tag and encoder
-// type.
-type sizer func(prop *Properties, base structPointer) int
-
-// A valueSizer returns the encoded size of a single integer in a particular
-// encoding.
-type valueSizer func(x uint64) int
-
-// Decoders are defined in decode.go
-// A decoder creates a value from its wire representation.
-// Unrecognized subelements are saved in unrec.
-type decoder func(p *Buffer, prop *Properties, base structPointer) error
-
-// A valueDecoder decodes a single integer in a particular encoding.
-type valueDecoder func(o *Buffer) (x uint64, err error)
-
-// A oneofMarshaler does the marshaling for all oneof fields in a message.
-type oneofMarshaler func(Message, *Buffer) error
-
-// A oneofUnmarshaler does the unmarshaling for a oneof field in a message.
-type oneofUnmarshaler func(Message, int, int, *Buffer) (bool, error)
-
-// A oneofSizer does the sizing for all oneof fields in a message.
-type oneofSizer func(Message) int
-
 // tagMap is an optimization over map[int]int for typical protocol buffer
 // use-cases. Encoded protocol buffers are often in tag order with small tag
 // numbers.
@@ -140,13 +104,6 @@
 	decoderTags      tagMap         // map from proto tag to struct field number
 	decoderOrigNames map[string]int // map from original name to struct field number
 	order            []int          // list of struct field numbers in tag order
-	unrecField       field          // field id of the XXX_unrecognized []byte field
-	extendable       bool           // is this an extendable proto
-
-	oneofMarshaler   oneofMarshaler
-	oneofUnmarshaler oneofUnmarshaler
-	oneofSizer       oneofSizer
-	stype            reflect.Type
 
 	// OneofTypes contains information about the oneof fields in this message.
 	// It is keyed by the original name of a field.
@@ -187,36 +144,19 @@
 
 	Default    string // default value
 	HasDefault bool   // whether an explicit default was provided
-	def_uint64 uint64
 
-	enc           encoder
-	valEnc        valueEncoder // set for bool and numeric types only
-	field         field
-	tagcode       []byte // encoding of EncodeVarint((Tag<<3)|WireType)
-	tagbuf        [8]byte
-	stype         reflect.Type      // set for struct types only
-	sprop         *StructProperties // set for struct types only
-	isMarshaler   bool
-	isUnmarshaler bool
+	stype reflect.Type      // set for struct types only
+	sprop *StructProperties // set for struct types only
 
 	mtype    reflect.Type // set for map types only
 	mkeyprop *Properties  // set for map types only
 	mvalprop *Properties  // set for map types only
-
-	size    sizer
-	valSize valueSizer // set for bool and numeric types only
-
-	dec    decoder
-	valDec valueDecoder // set for bool and numeric types only
-
-	// If this is a packable field, this will be the decoder for the packed version of the field.
-	packedDec decoder
 }
 
 // String formats the properties in the protobuf struct field tag style.
 func (p *Properties) String() string {
 	s := p.Wire
-	s = ","
+	s += ","
 	s += strconv.Itoa(p.Tag)
 	if p.Required {
 		s += ",req"
@@ -262,29 +202,14 @@
 	switch p.Wire {
 	case "varint":
 		p.WireType = WireVarint
-		p.valEnc = (*Buffer).EncodeVarint
-		p.valDec = (*Buffer).DecodeVarint
-		p.valSize = sizeVarint
 	case "fixed32":
 		p.WireType = WireFixed32
-		p.valEnc = (*Buffer).EncodeFixed32
-		p.valDec = (*Buffer).DecodeFixed32
-		p.valSize = sizeFixed32
 	case "fixed64":
 		p.WireType = WireFixed64
-		p.valEnc = (*Buffer).EncodeFixed64
-		p.valDec = (*Buffer).DecodeFixed64
-		p.valSize = sizeFixed64
 	case "zigzag32":
 		p.WireType = WireVarint
-		p.valEnc = (*Buffer).EncodeZigzag32
-		p.valDec = (*Buffer).DecodeZigzag32
-		p.valSize = sizeZigzag32
 	case "zigzag64":
 		p.WireType = WireVarint
-		p.valEnc = (*Buffer).EncodeZigzag64
-		p.valDec = (*Buffer).DecodeZigzag64
-		p.valSize = sizeZigzag64
 	case "bytes", "group":
 		p.WireType = WireBytes
 		// no numeric converter for non-numeric types
@@ -299,6 +224,7 @@
 		return
 	}
 
+outer:
 	for i := 2; i < len(fields); i++ {
 		f := fields[i]
 		switch {
@@ -326,229 +252,28 @@
 			if i+1 < len(fields) {
 				// Commas aren't escaped, and def is always last.
 				p.Default += "," + strings.Join(fields[i+1:], ",")
-				break
+				break outer
 			}
 		}
 	}
 }
 
-func logNoSliceEnc(t1, t2 reflect.Type) {
-	fmt.Fprintf(os.Stderr, "proto: no slice oenc for %T = []%T\n", t1, t2)
-}
-
 var protoMessageType = reflect.TypeOf((*Message)(nil)).Elem()
 
-// Initialize the fields for encoding and decoding.
-func (p *Properties) setEncAndDec(typ reflect.Type, f *reflect.StructField, lockGetProp bool) {
-	p.enc = nil
-	p.dec = nil
-	p.size = nil
-
+// setFieldProps initializes the field properties for submessages and maps.
+func (p *Properties) setFieldProps(typ reflect.Type, f *reflect.StructField, lockGetProp bool) {
 	switch t1 := typ; t1.Kind() {
-	default:
-		fmt.Fprintf(os.Stderr, "proto: no coders for %v\n", t1)
-
-	// proto3 scalar types
-
-	case reflect.Bool:
-		p.enc = (*Buffer).enc_proto3_bool
-		p.dec = (*Buffer).dec_proto3_bool
-		p.size = size_proto3_bool
-	case reflect.Int32:
-		p.enc = (*Buffer).enc_proto3_int32
-		p.dec = (*Buffer).dec_proto3_int32
-		p.size = size_proto3_int32
-	case reflect.Uint32:
-		p.enc = (*Buffer).enc_proto3_uint32
-		p.dec = (*Buffer).dec_proto3_int32 // can reuse
-		p.size = size_proto3_uint32
-	case reflect.Int64, reflect.Uint64:
-		p.enc = (*Buffer).enc_proto3_int64
-		p.dec = (*Buffer).dec_proto3_int64
-		p.size = size_proto3_int64
-	case reflect.Float32:
-		p.enc = (*Buffer).enc_proto3_uint32 // can just treat them as bits
-		p.dec = (*Buffer).dec_proto3_int32
-		p.size = size_proto3_uint32
-	case reflect.Float64:
-		p.enc = (*Buffer).enc_proto3_int64 // can just treat them as bits
-		p.dec = (*Buffer).dec_proto3_int64
-		p.size = size_proto3_int64
-	case reflect.String:
-		p.enc = (*Buffer).enc_proto3_string
-		p.dec = (*Buffer).dec_proto3_string
-		p.size = size_proto3_string
-
 	case reflect.Ptr:
-		switch t2 := t1.Elem(); t2.Kind() {
-		default:
-			fmt.Fprintf(os.Stderr, "proto: no encoder function for %v -> %v\n", t1, t2)
-			break
-		case reflect.Bool:
-			p.enc = (*Buffer).enc_bool
-			p.dec = (*Buffer).dec_bool
-			p.size = size_bool
-		case reflect.Int32:
-			p.enc = (*Buffer).enc_int32
-			p.dec = (*Buffer).dec_int32
-			p.size = size_int32
-		case reflect.Uint32:
-			p.enc = (*Buffer).enc_uint32
-			p.dec = (*Buffer).dec_int32 // can reuse
-			p.size = size_uint32
-		case reflect.Int64, reflect.Uint64:
-			p.enc = (*Buffer).enc_int64
-			p.dec = (*Buffer).dec_int64
-			p.size = size_int64
-		case reflect.Float32:
-			p.enc = (*Buffer).enc_uint32 // can just treat them as bits
-			p.dec = (*Buffer).dec_int32
-			p.size = size_uint32
-		case reflect.Float64:
-			p.enc = (*Buffer).enc_int64 // can just treat them as bits
-			p.dec = (*Buffer).dec_int64
-			p.size = size_int64
-		case reflect.String:
-			p.enc = (*Buffer).enc_string
-			p.dec = (*Buffer).dec_string
-			p.size = size_string
-		case reflect.Struct:
+		if t1.Elem().Kind() == reflect.Struct {
 			p.stype = t1.Elem()
-			p.isMarshaler = isMarshaler(t1)
-			p.isUnmarshaler = isUnmarshaler(t1)
-			if p.Wire == "bytes" {
-				p.enc = (*Buffer).enc_struct_message
-				p.dec = (*Buffer).dec_struct_message
-				p.size = size_struct_message
-			} else {
-				p.enc = (*Buffer).enc_struct_group
-				p.dec = (*Buffer).dec_struct_group
-				p.size = size_struct_group
-			}
 		}
 
 	case reflect.Slice:
-		switch t2 := t1.Elem(); t2.Kind() {
-		default:
-			logNoSliceEnc(t1, t2)
-			break
-		case reflect.Bool:
-			if p.Packed {
-				p.enc = (*Buffer).enc_slice_packed_bool
-				p.size = size_slice_packed_bool
-			} else {
-				p.enc = (*Buffer).enc_slice_bool
-				p.size = size_slice_bool
-			}
-			p.dec = (*Buffer).dec_slice_bool
-			p.packedDec = (*Buffer).dec_slice_packed_bool
-		case reflect.Int32:
-			if p.Packed {
-				p.enc = (*Buffer).enc_slice_packed_int32
-				p.size = size_slice_packed_int32
-			} else {
-				p.enc = (*Buffer).enc_slice_int32
-				p.size = size_slice_int32
-			}
-			p.dec = (*Buffer).dec_slice_int32
-			p.packedDec = (*Buffer).dec_slice_packed_int32
-		case reflect.Uint32:
-			if p.Packed {
-				p.enc = (*Buffer).enc_slice_packed_uint32
-				p.size = size_slice_packed_uint32
-			} else {
-				p.enc = (*Buffer).enc_slice_uint32
-				p.size = size_slice_uint32
-			}
-			p.dec = (*Buffer).dec_slice_int32
-			p.packedDec = (*Buffer).dec_slice_packed_int32
-		case reflect.Int64, reflect.Uint64:
-			if p.Packed {
-				p.enc = (*Buffer).enc_slice_packed_int64
-				p.size = size_slice_packed_int64
-			} else {
-				p.enc = (*Buffer).enc_slice_int64
-				p.size = size_slice_int64
-			}
-			p.dec = (*Buffer).dec_slice_int64
-			p.packedDec = (*Buffer).dec_slice_packed_int64
-		case reflect.Uint8:
-			p.dec = (*Buffer).dec_slice_byte
-			if p.proto3 {
-				p.enc = (*Buffer).enc_proto3_slice_byte
-				p.size = size_proto3_slice_byte
-			} else {
-				p.enc = (*Buffer).enc_slice_byte
-				p.size = size_slice_byte
-			}
-		case reflect.Float32, reflect.Float64:
-			switch t2.Bits() {
-			case 32:
-				// can just treat them as bits
-				if p.Packed {
-					p.enc = (*Buffer).enc_slice_packed_uint32
-					p.size = size_slice_packed_uint32
-				} else {
-					p.enc = (*Buffer).enc_slice_uint32
-					p.size = size_slice_uint32
-				}
-				p.dec = (*Buffer).dec_slice_int32
-				p.packedDec = (*Buffer).dec_slice_packed_int32
-			case 64:
-				// can just treat them as bits
-				if p.Packed {
-					p.enc = (*Buffer).enc_slice_packed_int64
-					p.size = size_slice_packed_int64
-				} else {
-					p.enc = (*Buffer).enc_slice_int64
-					p.size = size_slice_int64
-				}
-				p.dec = (*Buffer).dec_slice_int64
-				p.packedDec = (*Buffer).dec_slice_packed_int64
-			default:
-				logNoSliceEnc(t1, t2)
-				break
-			}
-		case reflect.String:
-			p.enc = (*Buffer).enc_slice_string
-			p.dec = (*Buffer).dec_slice_string
-			p.size = size_slice_string
-		case reflect.Ptr:
-			switch t3 := t2.Elem(); t3.Kind() {
-			default:
-				fmt.Fprintf(os.Stderr, "proto: no ptr oenc for %T -> %T -> %T\n", t1, t2, t3)
-				break
-			case reflect.Struct:
-				p.stype = t2.Elem()
-				p.isMarshaler = isMarshaler(t2)
-				p.isUnmarshaler = isUnmarshaler(t2)
-				if p.Wire == "bytes" {
-					p.enc = (*Buffer).enc_slice_struct_message
-					p.dec = (*Buffer).dec_slice_struct_message
-					p.size = size_slice_struct_message
-				} else {
-					p.enc = (*Buffer).enc_slice_struct_group
-					p.dec = (*Buffer).dec_slice_struct_group
-					p.size = size_slice_struct_group
-				}
-			}
-		case reflect.Slice:
-			switch t2.Elem().Kind() {
-			default:
-				fmt.Fprintf(os.Stderr, "proto: no slice elem oenc for %T -> %T -> %T\n", t1, t2, t2.Elem())
-				break
-			case reflect.Uint8:
-				p.enc = (*Buffer).enc_slice_slice_byte
-				p.dec = (*Buffer).dec_slice_slice_byte
-				p.size = size_slice_slice_byte
-			}
+		if t2 := t1.Elem(); t2.Kind() == reflect.Ptr && t2.Elem().Kind() == reflect.Struct {
+			p.stype = t2.Elem()
 		}
 
 	case reflect.Map:
-		p.enc = (*Buffer).enc_new_map
-		p.dec = (*Buffer).dec_new_map
-		p.size = size_new_map
-
 		p.mtype = t1
 		p.mkeyprop = &Properties{}
 		p.mkeyprop.init(reflect.PtrTo(p.mtype.Key()), "Key", f.Tag.Get("protobuf_key"), nil, lockGetProp)
@@ -562,20 +287,6 @@
 		p.mvalprop.init(vtype, "Value", f.Tag.Get("protobuf_val"), nil, lockGetProp)
 	}
 
-	// precalculate tag code
-	wire := p.WireType
-	if p.Packed {
-		wire = WireBytes
-	}
-	x := uint32(p.Tag)<<3 | uint32(wire)
-	i := 0
-	for i = 0; x > 127; i++ {
-		p.tagbuf[i] = 0x80 | uint8(x&0x7F)
-		x >>= 7
-	}
-	p.tagbuf[i] = uint8(x)
-	p.tagcode = p.tagbuf[0 : i+1]
-
 	if p.stype != nil {
 		if lockGetProp {
 			p.sprop = GetProperties(p.stype)
@@ -586,32 +297,9 @@
 }
 
 var (
-	marshalerType   = reflect.TypeOf((*Marshaler)(nil)).Elem()
-	unmarshalerType = reflect.TypeOf((*Unmarshaler)(nil)).Elem()
+	marshalerType = reflect.TypeOf((*Marshaler)(nil)).Elem()
 )
 
-// isMarshaler reports whether type t implements Marshaler.
-func isMarshaler(t reflect.Type) bool {
-	// We're checking for (likely) pointer-receiver methods
-	// so if t is not a pointer, something is very wrong.
-	// The calls above only invoke isMarshaler on pointer types.
-	if t.Kind() != reflect.Ptr {
-		panic("proto: misuse of isMarshaler")
-	}
-	return t.Implements(marshalerType)
-}
-
-// isUnmarshaler reports whether type t implements Unmarshaler.
-func isUnmarshaler(t reflect.Type) bool {
-	// We're checking for (likely) pointer-receiver methods
-	// so if t is not a pointer, something is very wrong.
-	// The calls above only invoke isUnmarshaler on pointer types.
-	if t.Kind() != reflect.Ptr {
-		panic("proto: misuse of isUnmarshaler")
-	}
-	return t.Implements(unmarshalerType)
-}
-
 // Init populates the properties from a protocol buffer struct tag.
 func (p *Properties) Init(typ reflect.Type, name, tag string, f *reflect.StructField) {
 	p.init(typ, name, tag, f, true)
@@ -621,14 +309,11 @@
 	// "bytes,49,opt,def=hello!"
 	p.Name = name
 	p.OrigName = name
-	if f != nil {
-		p.field = toField(f)
-	}
 	if tag == "" {
 		return
 	}
 	p.Parse(tag)
-	p.setEncAndDec(typ, f, lockGetProp)
+	p.setFieldProps(typ, f, lockGetProp)
 }
 
 var (
@@ -678,9 +363,6 @@
 	propertiesMap[t] = prop
 
 	// build properties
-	prop.extendable = reflect.PtrTo(t).Implements(extendableProtoType) ||
-		reflect.PtrTo(t).Implements(extendableProtoV1Type)
-	prop.unrecField = invalidField
 	prop.Prop = make([]*Properties, t.NumField())
 	prop.order = make([]int, t.NumField())
 
@@ -690,17 +372,6 @@
 		name := f.Name
 		p.init(f.Type, name, f.Tag.Get("protobuf"), &f, false)
 
-		if f.Name == "XXX_InternalExtensions" { // special case
-			p.enc = (*Buffer).enc_exts
-			p.dec = nil // not needed
-			p.size = size_exts
-		} else if f.Name == "XXX_extensions" { // special case
-			p.enc = (*Buffer).enc_map
-			p.dec = nil // not needed
-			p.size = size_map
-		} else if f.Name == "XXX_unrecognized" { // special case
-			prop.unrecField = toField(&f)
-		}
 		oneof := f.Tag.Get("protobuf_oneof") // special case
 		if oneof != "" {
 			// Oneof fields don't use the traditional protobuf tag.
@@ -715,9 +386,6 @@
 			}
 			print("\n")
 		}
-		if p.enc == nil && !strings.HasPrefix(f.Name, "XXX_") && oneof == "" {
-			fmt.Fprintln(os.Stderr, "proto: no encoder for", f.Name, f.Type.String(), "[GetProperties]")
-		}
 	}
 
 	// Re-order prop.order.
@@ -728,8 +396,7 @@
 	}
 	if om, ok := reflect.Zero(reflect.PtrTo(t)).Interface().(oneofMessage); ok {
 		var oots []interface{}
-		prop.oneofMarshaler, prop.oneofUnmarshaler, prop.oneofSizer, oots = om.XXX_OneofFuncs()
-		prop.stype = t
+		_, _, _, oots = om.XXX_OneofFuncs()
 
 		// Interpret oneof metadata.
 		prop.OneofTypes = make(map[string]*OneofProperties)
@@ -779,30 +446,6 @@
 	return prop
 }
 
-// Return the Properties object for the x[0]'th field of the structure.
-func propByIndex(t reflect.Type, x []int) *Properties {
-	if len(x) != 1 {
-		fmt.Fprintf(os.Stderr, "proto: field index dimension %d (not 1) for type %s\n", len(x), t)
-		return nil
-	}
-	prop := GetProperties(t)
-	return prop.Prop[x[0]]
-}
-
-// Get the address and type of a pointer to a struct from an interface.
-func getbase(pb Message) (t reflect.Type, b structPointer, err error) {
-	if pb == nil {
-		err = ErrNil
-		return
-	}
-	// get the reflect type of the pointer to the struct.
-	t = reflect.TypeOf(pb)
-	// get the address of the struct.
-	value := reflect.ValueOf(pb)
-	b = toStructPointer(value)
-	return
-}
-
 // A global registry of enum types.
 // The generated code will register the generated maps by calling RegisterEnum.
 
@@ -826,20 +469,42 @@
 // A registry of all linked message types.
 // The string is a fully-qualified proto name ("pkg.Message").
 var (
-	protoTypes    = make(map[string]reflect.Type)
-	revProtoTypes = make(map[reflect.Type]string)
+	protoTypedNils = make(map[string]Message)      // a map from proto names to typed nil pointers
+	protoMapTypes  = make(map[string]reflect.Type) // a map from proto names to map types
+	revProtoTypes  = make(map[reflect.Type]string)
 )
 
 // RegisterType is called from generated code and maps from the fully qualified
 // proto name to the type (pointer to struct) of the protocol buffer.
 func RegisterType(x Message, name string) {
-	if _, ok := protoTypes[name]; ok {
+	if _, ok := protoTypedNils[name]; ok {
 		// TODO: Some day, make this a panic.
 		log.Printf("proto: duplicate proto type registered: %s", name)
 		return
 	}
 	t := reflect.TypeOf(x)
-	protoTypes[name] = t
+	if v := reflect.ValueOf(x); v.Kind() == reflect.Ptr && v.Pointer() == 0 {
+		// Generated code always calls RegisterType with nil x.
+		// This check is just for extra safety.
+		protoTypedNils[name] = x
+	} else {
+		protoTypedNils[name] = reflect.Zero(t).Interface().(Message)
+	}
+	revProtoTypes[t] = name
+}
+
+// RegisterMapType is called from generated code and maps from the fully qualified
+// proto name to the native map type of the proto map definition.
+func RegisterMapType(x interface{}, name string) {
+	if reflect.TypeOf(x).Kind() != reflect.Map {
+		panic(fmt.Sprintf("RegisterMapType(%T, %q); want map", x, name))
+	}
+	if _, ok := protoMapTypes[name]; ok {
+		log.Printf("proto: duplicate proto type registered: %s", name)
+		return
+	}
+	t := reflect.TypeOf(x)
+	protoMapTypes[name] = t
 	revProtoTypes[t] = name
 }
 
@@ -855,7 +520,14 @@
 }
 
 // MessageType returns the message type (pointer to struct) for a named message.
-func MessageType(name string) reflect.Type { return protoTypes[name] }
+// The type is not guaranteed to implement proto.Message if the name refers to a
+// map entry.
+func MessageType(name string) reflect.Type {
+	if t, ok := protoTypedNils[name]; ok {
+		return reflect.TypeOf(t)
+	}
+	return protoMapTypes[name]
+}
 
 // A registry of all linked proto files.
 var (
diff --git a/proto/proto3_proto/proto3.pb.go b/proto/proto3_proto/proto3.pb.go
index cc4d048..a80f089 100644
--- a/proto/proto3_proto/proto3.pb.go
+++ b/proto/proto3_proto/proto3.pb.go
@@ -1,27 +1,13 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: proto3_proto/proto3.proto
-// DO NOT EDIT!
 
-/*
-Package proto3_proto is a generated protocol buffer package.
-
-It is generated from these files:
-	proto3_proto/proto3.proto
-
-It has these top-level messages:
-	Message
-	Nested
-	MessageWithMap
-	IntMap
-	IntMaps
-*/
 package proto3_proto
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
 import math "math"
-import google_protobuf "github.com/golang/protobuf/ptypes/any"
-import testdata "github.com/golang/protobuf/proto/testdata"
+import test_proto "github.com/golang/protobuf/proto/test_proto"
+import any "github.com/golang/protobuf/ptypes/any"
 
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
@@ -59,33 +45,58 @@
 func (x Message_Humour) String() string {
 	return proto.EnumName(Message_Humour_name, int32(x))
 }
-func (Message_Humour) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0, 0} }
-
-type Message struct {
-	Name         string                           `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	Hilarity     Message_Humour                   `protobuf:"varint,2,opt,name=hilarity,enum=proto3_proto.Message_Humour" json:"hilarity,omitempty"`
-	HeightInCm   uint32                           `protobuf:"varint,3,opt,name=height_in_cm,json=heightInCm" json:"height_in_cm,omitempty"`
-	Data         []byte                           `protobuf:"bytes,4,opt,name=data,proto3" json:"data,omitempty"`
-	ResultCount  int64                            `protobuf:"varint,7,opt,name=result_count,json=resultCount" json:"result_count,omitempty"`
-	TrueScotsman bool                             `protobuf:"varint,8,opt,name=true_scotsman,json=trueScotsman" json:"true_scotsman,omitempty"`
-	Score        float32                          `protobuf:"fixed32,9,opt,name=score" json:"score,omitempty"`
-	Key          []uint64                         `protobuf:"varint,5,rep,packed,name=key" json:"key,omitempty"`
-	ShortKey     []int32                          `protobuf:"varint,19,rep,packed,name=short_key,json=shortKey" json:"short_key,omitempty"`
-	Nested       *Nested                          `protobuf:"bytes,6,opt,name=nested" json:"nested,omitempty"`
-	RFunny       []Message_Humour                 `protobuf:"varint,16,rep,packed,name=r_funny,json=rFunny,enum=proto3_proto.Message_Humour" json:"r_funny,omitempty"`
-	Terrain      map[string]*Nested               `protobuf:"bytes,10,rep,name=terrain" json:"terrain,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	Proto2Field  *testdata.SubDefaults            `protobuf:"bytes,11,opt,name=proto2_field,json=proto2Field" json:"proto2_field,omitempty"`
-	Proto2Value  map[string]*testdata.SubDefaults `protobuf:"bytes,13,rep,name=proto2_value,json=proto2Value" json:"proto2_value,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	Anything     *google_protobuf.Any             `protobuf:"bytes,14,opt,name=anything" json:"anything,omitempty"`
-	ManyThings   []*google_protobuf.Any           `protobuf:"bytes,15,rep,name=many_things,json=manyThings" json:"many_things,omitempty"`
-	Submessage   *Message                         `protobuf:"bytes,17,opt,name=submessage" json:"submessage,omitempty"`
-	Children     []*Message                       `protobuf:"bytes,18,rep,name=children" json:"children,omitempty"`
+func (Message_Humour) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_e706e4ff19a5dbea, []int{0, 0}
 }
 
-func (m *Message) Reset()                    { *m = Message{} }
-func (m *Message) String() string            { return proto.CompactTextString(m) }
-func (*Message) ProtoMessage()               {}
-func (*Message) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+type Message struct {
+	Name                 string                             `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Hilarity             Message_Humour                     `protobuf:"varint,2,opt,name=hilarity,enum=proto3_proto.Message_Humour" json:"hilarity,omitempty"`
+	HeightInCm           uint32                             `protobuf:"varint,3,opt,name=height_in_cm,json=heightInCm" json:"height_in_cm,omitempty"`
+	Data                 []byte                             `protobuf:"bytes,4,opt,name=data,proto3" json:"data,omitempty"`
+	ResultCount          int64                              `protobuf:"varint,7,opt,name=result_count,json=resultCount" json:"result_count,omitempty"`
+	TrueScotsman         bool                               `protobuf:"varint,8,opt,name=true_scotsman,json=trueScotsman" json:"true_scotsman,omitempty"`
+	Score                float32                            `protobuf:"fixed32,9,opt,name=score" json:"score,omitempty"`
+	Key                  []uint64                           `protobuf:"varint,5,rep,packed,name=key" json:"key,omitempty"`
+	ShortKey             []int32                            `protobuf:"varint,19,rep,packed,name=short_key,json=shortKey" json:"short_key,omitempty"`
+	Nested               *Nested                            `protobuf:"bytes,6,opt,name=nested" json:"nested,omitempty"`
+	RFunny               []Message_Humour                   `protobuf:"varint,16,rep,packed,name=r_funny,json=rFunny,enum=proto3_proto.Message_Humour" json:"r_funny,omitempty"`
+	Terrain              map[string]*Nested                 `protobuf:"bytes,10,rep,name=terrain" json:"terrain,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Proto2Field          *test_proto.SubDefaults            `protobuf:"bytes,11,opt,name=proto2_field,json=proto2Field" json:"proto2_field,omitempty"`
+	Proto2Value          map[string]*test_proto.SubDefaults `protobuf:"bytes,13,rep,name=proto2_value,json=proto2Value" json:"proto2_value,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Anything             *any.Any                           `protobuf:"bytes,14,opt,name=anything" json:"anything,omitempty"`
+	ManyThings           []*any.Any                         `protobuf:"bytes,15,rep,name=many_things,json=manyThings" json:"many_things,omitempty"`
+	Submessage           *Message                           `protobuf:"bytes,17,opt,name=submessage" json:"submessage,omitempty"`
+	Children             []*Message                         `protobuf:"bytes,18,rep,name=children" json:"children,omitempty"`
+	StringMap            map[string]string                  `protobuf:"bytes,20,rep,name=string_map,json=stringMap" json:"string_map,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}                           `json:"-"`
+	XXX_unrecognized     []byte                             `json:"-"`
+	XXX_sizecache        int32                              `json:"-"`
+}
+
+func (m *Message) Reset()         { *m = Message{} }
+func (m *Message) String() string { return proto.CompactTextString(m) }
+func (*Message) ProtoMessage()    {}
+func (*Message) Descriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_e706e4ff19a5dbea, []int{0}
+}
+func (m *Message) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Message.Unmarshal(m, b)
+}
+func (m *Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Message.Marshal(b, m, deterministic)
+}
+func (dst *Message) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Message.Merge(dst, src)
+}
+func (m *Message) XXX_Size() int {
+	return xxx_messageInfo_Message.Size(m)
+}
+func (m *Message) XXX_DiscardUnknown() {
+	xxx_messageInfo_Message.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Message proto.InternalMessageInfo
 
 func (m *Message) GetName() string {
 	if m != nil {
@@ -171,28 +182,28 @@
 	return nil
 }
 
-func (m *Message) GetProto2Field() *testdata.SubDefaults {
+func (m *Message) GetProto2Field() *test_proto.SubDefaults {
 	if m != nil {
 		return m.Proto2Field
 	}
 	return nil
 }
 
-func (m *Message) GetProto2Value() map[string]*testdata.SubDefaults {
+func (m *Message) GetProto2Value() map[string]*test_proto.SubDefaults {
 	if m != nil {
 		return m.Proto2Value
 	}
 	return nil
 }
 
-func (m *Message) GetAnything() *google_protobuf.Any {
+func (m *Message) GetAnything() *any.Any {
 	if m != nil {
 		return m.Anything
 	}
 	return nil
 }
 
-func (m *Message) GetManyThings() []*google_protobuf.Any {
+func (m *Message) GetManyThings() []*any.Any {
 	if m != nil {
 		return m.ManyThings
 	}
@@ -213,15 +224,44 @@
 	return nil
 }
 
-type Nested struct {
-	Bunny string `protobuf:"bytes,1,opt,name=bunny" json:"bunny,omitempty"`
-	Cute  bool   `protobuf:"varint,2,opt,name=cute" json:"cute,omitempty"`
+func (m *Message) GetStringMap() map[string]string {
+	if m != nil {
+		return m.StringMap
+	}
+	return nil
 }
 
-func (m *Nested) Reset()                    { *m = Nested{} }
-func (m *Nested) String() string            { return proto.CompactTextString(m) }
-func (*Nested) ProtoMessage()               {}
-func (*Nested) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+type Nested struct {
+	Bunny                string   `protobuf:"bytes,1,opt,name=bunny" json:"bunny,omitempty"`
+	Cute                 bool     `protobuf:"varint,2,opt,name=cute" json:"cute,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Nested) Reset()         { *m = Nested{} }
+func (m *Nested) String() string { return proto.CompactTextString(m) }
+func (*Nested) ProtoMessage()    {}
+func (*Nested) Descriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_e706e4ff19a5dbea, []int{1}
+}
+func (m *Nested) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Nested.Unmarshal(m, b)
+}
+func (m *Nested) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Nested.Marshal(b, m, deterministic)
+}
+func (dst *Nested) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Nested.Merge(dst, src)
+}
+func (m *Nested) XXX_Size() int {
+	return xxx_messageInfo_Nested.Size(m)
+}
+func (m *Nested) XXX_DiscardUnknown() {
+	xxx_messageInfo_Nested.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Nested proto.InternalMessageInfo
 
 func (m *Nested) GetBunny() string {
 	if m != nil {
@@ -238,13 +278,35 @@
 }
 
 type MessageWithMap struct {
-	ByteMapping map[bool][]byte `protobuf:"bytes,1,rep,name=byte_mapping,json=byteMapping" json:"byte_mapping,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	ByteMapping          map[bool][]byte `protobuf:"bytes,1,rep,name=byte_mapping,json=byteMapping" json:"byte_mapping,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
 }
 
-func (m *MessageWithMap) Reset()                    { *m = MessageWithMap{} }
-func (m *MessageWithMap) String() string            { return proto.CompactTextString(m) }
-func (*MessageWithMap) ProtoMessage()               {}
-func (*MessageWithMap) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+func (m *MessageWithMap) Reset()         { *m = MessageWithMap{} }
+func (m *MessageWithMap) String() string { return proto.CompactTextString(m) }
+func (*MessageWithMap) ProtoMessage()    {}
+func (*MessageWithMap) Descriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_e706e4ff19a5dbea, []int{2}
+}
+func (m *MessageWithMap) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MessageWithMap.Unmarshal(m, b)
+}
+func (m *MessageWithMap) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MessageWithMap.Marshal(b, m, deterministic)
+}
+func (dst *MessageWithMap) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MessageWithMap.Merge(dst, src)
+}
+func (m *MessageWithMap) XXX_Size() int {
+	return xxx_messageInfo_MessageWithMap.Size(m)
+}
+func (m *MessageWithMap) XXX_DiscardUnknown() {
+	xxx_messageInfo_MessageWithMap.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MessageWithMap proto.InternalMessageInfo
 
 func (m *MessageWithMap) GetByteMapping() map[bool][]byte {
 	if m != nil {
@@ -254,13 +316,35 @@
 }
 
 type IntMap struct {
-	Rtt map[int32]int32 `protobuf:"bytes,1,rep,name=rtt" json:"rtt,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	Rtt                  map[int32]int32 `protobuf:"bytes,1,rep,name=rtt" json:"rtt,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
 }
 
-func (m *IntMap) Reset()                    { *m = IntMap{} }
-func (m *IntMap) String() string            { return proto.CompactTextString(m) }
-func (*IntMap) ProtoMessage()               {}
-func (*IntMap) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+func (m *IntMap) Reset()         { *m = IntMap{} }
+func (m *IntMap) String() string { return proto.CompactTextString(m) }
+func (*IntMap) ProtoMessage()    {}
+func (*IntMap) Descriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_e706e4ff19a5dbea, []int{3}
+}
+func (m *IntMap) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_IntMap.Unmarshal(m, b)
+}
+func (m *IntMap) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_IntMap.Marshal(b, m, deterministic)
+}
+func (dst *IntMap) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_IntMap.Merge(dst, src)
+}
+func (m *IntMap) XXX_Size() int {
+	return xxx_messageInfo_IntMap.Size(m)
+}
+func (m *IntMap) XXX_DiscardUnknown() {
+	xxx_messageInfo_IntMap.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_IntMap proto.InternalMessageInfo
 
 func (m *IntMap) GetRtt() map[int32]int32 {
 	if m != nil {
@@ -270,13 +354,35 @@
 }
 
 type IntMaps struct {
-	Maps []*IntMap `protobuf:"bytes,1,rep,name=maps" json:"maps,omitempty"`
+	Maps                 []*IntMap `protobuf:"bytes,1,rep,name=maps" json:"maps,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
+	XXX_unrecognized     []byte    `json:"-"`
+	XXX_sizecache        int32     `json:"-"`
 }
 
-func (m *IntMaps) Reset()                    { *m = IntMaps{} }
-func (m *IntMaps) String() string            { return proto.CompactTextString(m) }
-func (*IntMaps) ProtoMessage()               {}
-func (*IntMaps) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+func (m *IntMaps) Reset()         { *m = IntMaps{} }
+func (m *IntMaps) String() string { return proto.CompactTextString(m) }
+func (*IntMaps) ProtoMessage()    {}
+func (*IntMaps) Descriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_e706e4ff19a5dbea, []int{4}
+}
+func (m *IntMaps) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_IntMaps.Unmarshal(m, b)
+}
+func (m *IntMaps) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_IntMaps.Marshal(b, m, deterministic)
+}
+func (dst *IntMaps) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_IntMaps.Merge(dst, src)
+}
+func (m *IntMaps) XXX_Size() int {
+	return xxx_messageInfo_IntMaps.Size(m)
+}
+func (m *IntMaps) XXX_DiscardUnknown() {
+	xxx_messageInfo_IntMaps.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_IntMaps proto.InternalMessageInfo
 
 func (m *IntMaps) GetMaps() []*IntMap {
 	if m != nil {
@@ -287,61 +393,69 @@
 
 func init() {
 	proto.RegisterType((*Message)(nil), "proto3_proto.Message")
+	proto.RegisterMapType((map[string]*test_proto.SubDefaults)(nil), "proto3_proto.Message.Proto2ValueEntry")
+	proto.RegisterMapType((map[string]string)(nil), "proto3_proto.Message.StringMapEntry")
+	proto.RegisterMapType((map[string]*Nested)(nil), "proto3_proto.Message.TerrainEntry")
 	proto.RegisterType((*Nested)(nil), "proto3_proto.Nested")
 	proto.RegisterType((*MessageWithMap)(nil), "proto3_proto.MessageWithMap")
+	proto.RegisterMapType((map[bool][]byte)(nil), "proto3_proto.MessageWithMap.ByteMappingEntry")
 	proto.RegisterType((*IntMap)(nil), "proto3_proto.IntMap")
+	proto.RegisterMapType((map[int32]int32)(nil), "proto3_proto.IntMap.RttEntry")
 	proto.RegisterType((*IntMaps)(nil), "proto3_proto.IntMaps")
 	proto.RegisterEnum("proto3_proto.Message_Humour", Message_Humour_name, Message_Humour_value)
 }
 
-func init() { proto.RegisterFile("proto3_proto/proto3.proto", fileDescriptor0) }
+func init() { proto.RegisterFile("proto3_proto/proto3.proto", fileDescriptor_proto3_e706e4ff19a5dbea) }
 
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+var fileDescriptor_proto3_e706e4ff19a5dbea = []byte{
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+	0x1f, 0x72, 0xc6, 0x31, 0xd2, 0x56, 0xef, 0x09, 0x3a, 0x60, 0xe8, 0x0a, 0x40, 0xc8, 0x3c, 0xe1,
+	0xeb, 0x38, 0xa5, 0x3b, 0x3c, 0xd0, 0x41, 0x5f, 0x37, 0xf7, 0x66, 0xae, 0xb9, 0x5b, 0xba, 0x33,
+	0x9d, 0xe9, 0x8b, 0xfd, 0x7d, 0x38, 0x03, 0xaf, 0x3e, 0xb7, 0xfd, 0x02, 0x9a, 0x2f, 0x4c, 0x2f,
+	0xe0, 0xb7, 0xd0, 0x31, 0xdd, 0x6f, 0xfd, 0xcf, 0x8a, 0x19, 0xe4, 0x45, 0xeb, 0xb9, 0x35, 0xbc,
+	0x07, 0xff, 0xdd, 0x51, 0x34, 0x64, 0x7d, 0x7a, 0x9c, 0xf5, 0xbd, 0xfb, 0x50, 0x4b, 0xfc, 0x12,
+	0x4e, 0x8f, 0xdf, 0xa3, 0x21, 0xed, 0xa0, 0x9e, 0xb6, 0x5f, 0x8b, 0x1e, 0xfd, 0x0c, 0x5d, 0xb3,
+	0xd7, 0xc8, 0x85, 0xde, 0x9b, 0xe9, 0xf5, 0xf4, 0xb7, 0xfb, 0xa9, 0xff, 0x11, 0x72, 0xa0, 0x3d,
+	0x7b, 0x33, 0x9d, 0xfb, 0x16, 0x3a, 0x81, 0xfe, 0xfc, 0xe6, 0x62, 0x36, 0xbf, 0x9b, 0x5c, 0x5d,
+	0xfb, 0x2d, 0xf4, 0x08, 0xdc, 0xcb, 0xc9, 0xcd, 0x4d, 0x7c, 0x79, 0x31, 0xb9, 0x79, 0xf5, 0x87,
+	0x6f, 0x8f, 0xc6, 0xd0, 0x35, 0x2f, 0xab, 0x4c, 0x16, 0xfa, 0x2b, 0x32, 0xc6, 0xe6, 0xa2, 0xfe,
+	0x2c, 0x96, 0x85, 0x34, 0xce, 0x0e, 0xd1, 0xe7, 0xd1, 0xbf, 0x16, 0x9c, 0x56, 0x33, 0xb8, 0x4f,
+	0xe4, 0xe6, 0x96, 0xee, 0xd0, 0x0c, 0xbc, 0x45, 0x29, 0x99, 0x9a, 0xd9, 0x4e, 0x2d, 0xa3, 0xa5,
+	0xe7, 0xf6, 0xb4, 0x71, 0x6e, 0x55, 0x4c, 0x74, 0x59, 0x4a, 0x76, 0x6b, 0xf8, 0x6a, 0xb5, 0x17,
+	0x6f, 0x95, 0xe1, 0x4f, 0xe0, 0xbf, 0x0b, 0xd4, 0x3b, 0xe3, 0x34, 0x74, 0xc6, 0xab, 0x77, 0xe6,
+	0x2f, 0xe8, 0x4e, 0xb8, 0x54, 0xb5, 0x9d, 0x81, 0x9d, 0x4b, 0x59, 0x95, 0xf4, 0xc5, 0x71, 0x49,
+	0x06, 0x89, 0x88, 0x94, 0xa6, 0x04, 0x45, 0x0e, 0x7f, 0x04, 0x67, 0x2f, 0xd4, 0x2d, 0x3b, 0x0d,
+	0x96, 0x9d, 0xba, 0xe5, 0x33, 0xe8, 0x99, 0x7c, 0x02, 0x85, 0xd0, 0x4e, 0xe9, 0x4e, 0x54, 0xa6,
+	0x83, 0x26, 0x53, 0xa2, 0x89, 0x45, 0xd7, 0x3c, 0xfa, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x99, 0x24,
+	0x6b, 0x12, 0x6d, 0x06, 0x00, 0x00,
 }
diff --git a/proto/proto3_proto/proto3.proto b/proto/proto3_proto/proto3.proto
index 2048655..c81fe1e 100644
--- a/proto/proto3_proto/proto3.proto
+++ b/proto/proto3_proto/proto3.proto
@@ -32,7 +32,7 @@
 syntax = "proto3";
 
 import "google/protobuf/any.proto";
-import "testdata/test.proto";
+import "test_proto/test.proto";
 
 package proto3_proto;
 
@@ -58,14 +58,16 @@
   repeated Humour r_funny = 16;
 
   map<string, Nested> terrain = 10;
-  testdata.SubDefaults proto2_field = 11;
-  map<string, testdata.SubDefaults> proto2_value = 13;
+  test_proto.SubDefaults proto2_field = 11;
+  map<string, test_proto.SubDefaults> proto2_value = 13;
 
   google.protobuf.Any anything = 14;
   repeated google.protobuf.Any many_things = 15;
 
   Message submessage = 17;
   repeated Message children = 18;
+
+  map<string, string> string_map = 20;
 }
 
 message Nested {
diff --git a/proto/proto3_test.go b/proto/proto3_test.go
index 735837f..73eed6c 100644
--- a/proto/proto3_test.go
+++ b/proto/proto3_test.go
@@ -32,11 +32,12 @@
 package proto_test
 
 import (
+	"bytes"
 	"testing"
 
 	"github.com/golang/protobuf/proto"
 	pb "github.com/golang/protobuf/proto/proto3_proto"
-	tpb "github.com/golang/protobuf/proto/testdata"
+	tpb "github.com/golang/protobuf/proto/test_proto"
 )
 
 func TestProto3ZeroValues(t *testing.T) {
@@ -133,3 +134,18 @@
 		t.Errorf("with in = %v\nproto.SetDefaults(in) =>\ngot %v\nwant %v", in, got, want)
 	}
 }
+
+func TestUnknownFieldPreservation(t *testing.T) {
+	b1 := "\x0a\x05David"      // Known tag 1
+	b2 := "\xc2\x0c\x06Google" // Unknown tag 200
+	b := []byte(b1 + b2)
+
+	m := new(pb.Message)
+	if err := proto.Unmarshal(b, m); err != nil {
+		t.Fatalf("proto.Unmarshal: %v", err)
+	}
+
+	if !bytes.Equal(m.XXX_unrecognized, []byte(b2)) {
+		t.Fatalf("mismatching unknown fields:\ngot  %q\nwant %q", m.XXX_unrecognized, b2)
+	}
+}
diff --git a/proto/size2_test.go b/proto/size2_test.go
index a2729c3..7846b06 100644
--- a/proto/size2_test.go
+++ b/proto/size2_test.go
@@ -55,7 +55,7 @@
 		{1 << 63, 10},
 	}
 	for _, tc := range testCases {
-		size := sizeVarint(tc.n)
+		size := SizeVarint(tc.n)
 		if size != tc.size {
 			t.Errorf("sizeVarint(%d) = %d, want %d", tc.n, size, tc.size)
 		}
diff --git a/proto/size_test.go b/proto/size_test.go
index af1034d..3abac41 100644
--- a/proto/size_test.go
+++ b/proto/size_test.go
@@ -38,7 +38,7 @@
 
 	. "github.com/golang/protobuf/proto"
 	proto3pb "github.com/golang/protobuf/proto/proto3_proto"
-	pb "github.com/golang/protobuf/proto/testdata"
+	pb "github.com/golang/protobuf/proto/test_proto"
 )
 
 var messageWithExtension1 = &pb.MyMessage{Count: Int32(7)}
@@ -59,6 +59,30 @@
 
 }
 
+// non-pointer custom message
+type nonptrMessage struct{}
+
+func (m nonptrMessage) ProtoMessage()  {}
+func (m nonptrMessage) Reset()         {}
+func (m nonptrMessage) String() string { return "" }
+
+func (m nonptrMessage) Marshal() ([]byte, error) {
+	return []byte{42}, nil
+}
+
+// custom message embedding a proto.Message
+type messageWithEmbedding struct {
+	*pb.OtherMessage
+}
+
+func (m *messageWithEmbedding) ProtoMessage()  {}
+func (m *messageWithEmbedding) Reset()         {}
+func (m *messageWithEmbedding) String() string { return "" }
+
+func (m *messageWithEmbedding) Marshal() ([]byte, error) {
+	return []byte{42}, nil
+}
+
 var SizeTests = []struct {
 	desc string
 	pb   Message
@@ -146,6 +170,9 @@
 	{"oneof group", &pb.Oneof{Union: &pb.Oneof_FGroup{&pb.Oneof_F_Group{X: Int32(52)}}}},
 	{"oneof largest tag", &pb.Oneof{Union: &pb.Oneof_F_Largest_Tag{1}}},
 	{"multiple oneofs", &pb.Oneof{Union: &pb.Oneof_F_Int32{1}, Tormato: &pb.Oneof_Value{2}}},
+
+	{"non-pointer message", nonptrMessage{}},
+	{"custom message with embedding", &messageWithEmbedding{&pb.OtherMessage{}}},
 }
 
 func TestSize(t *testing.T) {
diff --git a/proto/table_marshal.go b/proto/table_marshal.go
new file mode 100644
index 0000000..0f212b3
--- /dev/null
+++ b/proto/table_marshal.go
@@ -0,0 +1,2681 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+import (
+	"errors"
+	"fmt"
+	"math"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"unicode/utf8"
+)
+
+// a sizer takes a pointer to a field and the size of its tag, computes the size of
+// the encoded data.
+type sizer func(pointer, int) int
+
+// a marshaler takes a byte slice, a pointer to a field, and its tag (in wire format),
+// marshals the field to the end of the slice, returns the slice and error (if any).
+type marshaler func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error)
+
+// marshalInfo is the information used for marshaling a message.
+type marshalInfo struct {
+	typ          reflect.Type
+	fields       []*marshalFieldInfo
+	unrecognized field                      // offset of XXX_unrecognized
+	extensions   field                      // offset of XXX_InternalExtensions
+	v1extensions field                      // offset of XXX_extensions
+	sizecache    field                      // offset of XXX_sizecache
+	initialized  int32                      // 0 -- only typ is set, 1 -- fully initialized
+	messageset   bool                       // uses message set wire format
+	hasmarshaler bool                       // has custom marshaler
+	sync.RWMutex                            // protect extElems map, also for initialization
+	extElems     map[int32]*marshalElemInfo // info of extension elements
+}
+
+// marshalFieldInfo is the information used for marshaling a field of a message.
+type marshalFieldInfo struct {
+	field      field
+	wiretag    uint64 // tag in wire format
+	tagsize    int    // size of tag in wire format
+	sizer      sizer
+	marshaler  marshaler
+	isPointer  bool
+	required   bool                              // field is required
+	name       string                            // name of the field, for error reporting
+	oneofElems map[reflect.Type]*marshalElemInfo // info of oneof elements
+}
+
+// marshalElemInfo is the information used for marshaling an extension or oneof element.
+type marshalElemInfo struct {
+	wiretag   uint64 // tag in wire format
+	tagsize   int    // size of tag in wire format
+	sizer     sizer
+	marshaler marshaler
+	isptr     bool // elem is pointer typed, thus interface of this type is a direct interface (extension only)
+}
+
+var (
+	marshalInfoMap  = map[reflect.Type]*marshalInfo{}
+	marshalInfoLock sync.Mutex
+)
+
+// getMarshalInfo returns the information to marshal a given type of message.
+// The info it returns may not necessarily initialized.
+// t is the type of the message (NOT the pointer to it).
+func getMarshalInfo(t reflect.Type) *marshalInfo {
+	marshalInfoLock.Lock()
+	u, ok := marshalInfoMap[t]
+	if !ok {
+		u = &marshalInfo{typ: t}
+		marshalInfoMap[t] = u
+	}
+	marshalInfoLock.Unlock()
+	return u
+}
+
+// Size is the entry point from generated code,
+// and should be ONLY called by generated code.
+// It computes the size of encoded data of msg.
+// a is a pointer to a place to store cached marshal info.
+func (a *InternalMessageInfo) Size(msg Message) int {
+	u := getMessageMarshalInfo(msg, a)
+	ptr := toPointer(&msg)
+	if ptr.isNil() {
+		// We get here if msg is a typed nil ((*SomeMessage)(nil)),
+		// so it satisfies the interface, and msg == nil wouldn't
+		// catch it. We don't want crash in this case.
+		return 0
+	}
+	return u.size(ptr)
+}
+
+// Marshal is the entry point from generated code,
+// and should be ONLY called by generated code.
+// It marshals msg to the end of b.
+// a is a pointer to a place to store cached marshal info.
+func (a *InternalMessageInfo) Marshal(b []byte, msg Message, deterministic bool) ([]byte, error) {
+	u := getMessageMarshalInfo(msg, a)
+	ptr := toPointer(&msg)
+	if ptr.isNil() {
+		// We get here if msg is a typed nil ((*SomeMessage)(nil)),
+		// so it satisfies the interface, and msg == nil wouldn't
+		// catch it. We don't want crash in this case.
+		return b, ErrNil
+	}
+	return u.marshal(b, ptr, deterministic)
+}
+
+func getMessageMarshalInfo(msg interface{}, a *InternalMessageInfo) *marshalInfo {
+	// u := a.marshal, but atomically.
+	// We use an atomic here to ensure memory consistency.
+	u := atomicLoadMarshalInfo(&a.marshal)
+	if u == nil {
+		// Get marshal information from type of message.
+		t := reflect.ValueOf(msg).Type()
+		if t.Kind() != reflect.Ptr {
+			panic(fmt.Sprintf("cannot handle non-pointer message type %v", t))
+		}
+		u = getMarshalInfo(t.Elem())
+		// Store it in the cache for later users.
+		// a.marshal = u, but atomically.
+		atomicStoreMarshalInfo(&a.marshal, u)
+	}
+	return u
+}
+
+// size is the main function to compute the size of the encoded data of a message.
+// ptr is the pointer to the message.
+func (u *marshalInfo) size(ptr pointer) int {
+	if atomic.LoadInt32(&u.initialized) == 0 {
+		u.computeMarshalInfo()
+	}
+
+	// If the message can marshal itself, let it do it, for compatibility.
+	// NOTE: This is not efficient.
+	if u.hasmarshaler {
+		m := ptr.asPointerTo(u.typ).Interface().(Marshaler)
+		b, _ := m.Marshal()
+		return len(b)
+	}
+
+	n := 0
+	for _, f := range u.fields {
+		if f.isPointer && ptr.offset(f.field).getPointer().isNil() {
+			// nil pointer always marshals to nothing
+			continue
+		}
+		n += f.sizer(ptr.offset(f.field), f.tagsize)
+	}
+	if u.extensions.IsValid() {
+		e := ptr.offset(u.extensions).toExtensions()
+		if u.messageset {
+			n += u.sizeMessageSet(e)
+		} else {
+			n += u.sizeExtensions(e)
+		}
+	}
+	if u.v1extensions.IsValid() {
+		m := *ptr.offset(u.v1extensions).toOldExtensions()
+		n += u.sizeV1Extensions(m)
+	}
+	if u.unrecognized.IsValid() {
+		s := *ptr.offset(u.unrecognized).toBytes()
+		n += len(s)
+	}
+	// cache the result for use in marshal
+	if u.sizecache.IsValid() {
+		atomic.StoreInt32(ptr.offset(u.sizecache).toInt32(), int32(n))
+	}
+	return n
+}
+
+// cachedsize gets the size from cache. If there is no cache (i.e. message is not generated),
+// fall back to compute the size.
+func (u *marshalInfo) cachedsize(ptr pointer) int {
+	if u.sizecache.IsValid() {
+		return int(atomic.LoadInt32(ptr.offset(u.sizecache).toInt32()))
+	}
+	return u.size(ptr)
+}
+
+// marshal is the main function to marshal a message. It takes a byte slice and appends
+// the encoded data to the end of the slice, returns the slice and error (if any).
+// ptr is the pointer to the message.
+// If deterministic is true, map is marshaled in deterministic order.
+func (u *marshalInfo) marshal(b []byte, ptr pointer, deterministic bool) ([]byte, error) {
+	if atomic.LoadInt32(&u.initialized) == 0 {
+		u.computeMarshalInfo()
+	}
+
+	// If the message can marshal itself, let it do it, for compatibility.
+	// NOTE: This is not efficient.
+	if u.hasmarshaler {
+		m := ptr.asPointerTo(u.typ).Interface().(Marshaler)
+		b1, err := m.Marshal()
+		b = append(b, b1...)
+		return b, err
+	}
+
+	var err, errreq error
+	// The old marshaler encodes extensions at beginning.
+	if u.extensions.IsValid() {
+		e := ptr.offset(u.extensions).toExtensions()
+		if u.messageset {
+			b, err = u.appendMessageSet(b, e, deterministic)
+		} else {
+			b, err = u.appendExtensions(b, e, deterministic)
+		}
+		if err != nil {
+			return b, err
+		}
+	}
+	if u.v1extensions.IsValid() {
+		m := *ptr.offset(u.v1extensions).toOldExtensions()
+		b, err = u.appendV1Extensions(b, m, deterministic)
+		if err != nil {
+			return b, err
+		}
+	}
+	for _, f := range u.fields {
+		if f.required && errreq == nil {
+			if ptr.offset(f.field).getPointer().isNil() {
+				// Required field is not set.
+				// We record the error but keep going, to give a complete marshaling.
+				errreq = &RequiredNotSetError{f.name}
+				continue
+			}
+		}
+		if f.isPointer && ptr.offset(f.field).getPointer().isNil() {
+			// nil pointer always marshals to nothing
+			continue
+		}
+		b, err = f.marshaler(b, ptr.offset(f.field), f.wiretag, deterministic)
+		if err != nil {
+			if err1, ok := err.(*RequiredNotSetError); ok {
+				// Required field in submessage is not set.
+				// We record the error but keep going, to give a complete marshaling.
+				if errreq == nil {
+					errreq = &RequiredNotSetError{f.name + "." + err1.field}
+				}
+				continue
+			}
+			if err == errRepeatedHasNil {
+				err = errors.New("proto: repeated field " + f.name + " has nil element")
+			}
+			return b, err
+		}
+	}
+	if u.unrecognized.IsValid() {
+		s := *ptr.offset(u.unrecognized).toBytes()
+		b = append(b, s...)
+	}
+	return b, errreq
+}
+
+// computeMarshalInfo initializes the marshal info.
+func (u *marshalInfo) computeMarshalInfo() {
+	u.Lock()
+	defer u.Unlock()
+	if u.initialized != 0 { // non-atomic read is ok as it is protected by the lock
+		return
+	}
+
+	t := u.typ
+	u.unrecognized = invalidField
+	u.extensions = invalidField
+	u.v1extensions = invalidField
+	u.sizecache = invalidField
+
+	// If the message can marshal itself, let it do it, for compatibility.
+	// NOTE: This is not efficient.
+	if reflect.PtrTo(t).Implements(marshalerType) {
+		u.hasmarshaler = true
+		atomic.StoreInt32(&u.initialized, 1)
+		return
+	}
+
+	// get oneof implementers
+	var oneofImplementers []interface{}
+	if m, ok := reflect.Zero(reflect.PtrTo(t)).Interface().(oneofMessage); ok {
+		_, _, _, oneofImplementers = m.XXX_OneofFuncs()
+	}
+
+	n := t.NumField()
+
+	// deal with XXX fields first
+	for i := 0; i < t.NumField(); i++ {
+		f := t.Field(i)
+		if !strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+		switch f.Name {
+		case "XXX_sizecache":
+			u.sizecache = toField(&f)
+		case "XXX_unrecognized":
+			u.unrecognized = toField(&f)
+		case "XXX_InternalExtensions":
+			u.extensions = toField(&f)
+			u.messageset = f.Tag.Get("protobuf_messageset") == "1"
+		case "XXX_extensions":
+			u.v1extensions = toField(&f)
+		case "XXX_NoUnkeyedLiteral":
+			// nothing to do
+		default:
+			panic("unknown XXX field: " + f.Name)
+		}
+		n--
+	}
+
+	// normal fields
+	fields := make([]marshalFieldInfo, n) // batch allocation
+	u.fields = make([]*marshalFieldInfo, 0, n)
+	for i, j := 0, 0; i < t.NumField(); i++ {
+		f := t.Field(i)
+
+		if strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+		field := &fields[j]
+		j++
+		field.name = f.Name
+		u.fields = append(u.fields, field)
+		if f.Tag.Get("protobuf_oneof") != "" {
+			field.computeOneofFieldInfo(&f, oneofImplementers)
+			continue
+		}
+		if f.Tag.Get("protobuf") == "" {
+			// field has no tag (not in generated message), ignore it
+			u.fields = u.fields[:len(u.fields)-1]
+			j--
+			continue
+		}
+		field.computeMarshalFieldInfo(&f)
+	}
+
+	// fields are marshaled in tag order on the wire.
+	sort.Sort(byTag(u.fields))
+
+	atomic.StoreInt32(&u.initialized, 1)
+}
+
+// helper for sorting fields by tag
+type byTag []*marshalFieldInfo
+
+func (a byTag) Len() int           { return len(a) }
+func (a byTag) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a byTag) Less(i, j int) bool { return a[i].wiretag < a[j].wiretag }
+
+// getExtElemInfo returns the information to marshal an extension element.
+// The info it returns is initialized.
+func (u *marshalInfo) getExtElemInfo(desc *ExtensionDesc) *marshalElemInfo {
+	// get from cache first
+	u.RLock()
+	e, ok := u.extElems[desc.Field]
+	u.RUnlock()
+	if ok {
+		return e
+	}
+
+	t := reflect.TypeOf(desc.ExtensionType) // pointer or slice to basic type or struct
+	tags := strings.Split(desc.Tag, ",")
+	tag, err := strconv.Atoi(tags[1])
+	if err != nil {
+		panic("tag is not an integer")
+	}
+	wt := wiretype(tags[0])
+	sizer, marshaler := typeMarshaler(t, tags, false, false)
+	e = &marshalElemInfo{
+		wiretag:   uint64(tag)<<3 | wt,
+		tagsize:   SizeVarint(uint64(tag) << 3),
+		sizer:     sizer,
+		marshaler: marshaler,
+		isptr:     t.Kind() == reflect.Ptr,
+	}
+
+	// update cache
+	u.Lock()
+	if u.extElems == nil {
+		u.extElems = make(map[int32]*marshalElemInfo)
+	}
+	u.extElems[desc.Field] = e
+	u.Unlock()
+	return e
+}
+
+// computeMarshalFieldInfo fills up the information to marshal a field.
+func (fi *marshalFieldInfo) computeMarshalFieldInfo(f *reflect.StructField) {
+	// parse protobuf tag of the field.
+	// tag has format of "bytes,49,opt,name=foo,def=hello!"
+	tags := strings.Split(f.Tag.Get("protobuf"), ",")
+	if tags[0] == "" {
+		return
+	}
+	tag, err := strconv.Atoi(tags[1])
+	if err != nil {
+		panic("tag is not an integer")
+	}
+	wt := wiretype(tags[0])
+	if tags[2] == "req" {
+		fi.required = true
+	}
+	fi.setTag(f, tag, wt)
+	fi.setMarshaler(f, tags)
+}
+
+func (fi *marshalFieldInfo) computeOneofFieldInfo(f *reflect.StructField, oneofImplementers []interface{}) {
+	fi.field = toField(f)
+	fi.wiretag = 1<<31 - 1 // Use a large tag number, make oneofs sorted at the end. This tag will not appear on the wire.
+	fi.isPointer = true
+	fi.sizer, fi.marshaler = makeOneOfMarshaler(fi, f)
+	fi.oneofElems = make(map[reflect.Type]*marshalElemInfo)
+
+	ityp := f.Type // interface type
+	for _, o := range oneofImplementers {
+		t := reflect.TypeOf(o)
+		if !t.Implements(ityp) {
+			continue
+		}
+		sf := t.Elem().Field(0) // oneof implementer is a struct with a single field
+		tags := strings.Split(sf.Tag.Get("protobuf"), ",")
+		tag, err := strconv.Atoi(tags[1])
+		if err != nil {
+			panic("tag is not an integer")
+		}
+		wt := wiretype(tags[0])
+		sizer, marshaler := typeMarshaler(sf.Type, tags, false, true) // oneof should not omit any zero value
+		fi.oneofElems[t.Elem()] = &marshalElemInfo{
+			wiretag:   uint64(tag)<<3 | wt,
+			tagsize:   SizeVarint(uint64(tag) << 3),
+			sizer:     sizer,
+			marshaler: marshaler,
+		}
+	}
+}
+
+type oneofMessage interface {
+	XXX_OneofFuncs() (func(Message, *Buffer) error, func(Message, int, int, *Buffer) (bool, error), func(Message) int, []interface{})
+}
+
+// wiretype returns the wire encoding of the type.
+func wiretype(encoding string) uint64 {
+	switch encoding {
+	case "fixed32":
+		return WireFixed32
+	case "fixed64":
+		return WireFixed64
+	case "varint", "zigzag32", "zigzag64":
+		return WireVarint
+	case "bytes":
+		return WireBytes
+	case "group":
+		return WireStartGroup
+	}
+	panic("unknown wire type " + encoding)
+}
+
+// setTag fills up the tag (in wire format) and its size in the info of a field.
+func (fi *marshalFieldInfo) setTag(f *reflect.StructField, tag int, wt uint64) {
+	fi.field = toField(f)
+	fi.wiretag = uint64(tag)<<3 | wt
+	fi.tagsize = SizeVarint(uint64(tag) << 3)
+}
+
+// setMarshaler fills up the sizer and marshaler in the info of a field.
+func (fi *marshalFieldInfo) setMarshaler(f *reflect.StructField, tags []string) {
+	switch f.Type.Kind() {
+	case reflect.Map:
+		// map field
+		fi.isPointer = true
+		fi.sizer, fi.marshaler = makeMapMarshaler(f)
+		return
+	case reflect.Ptr, reflect.Slice:
+		fi.isPointer = true
+	}
+	fi.sizer, fi.marshaler = typeMarshaler(f.Type, tags, true, false)
+}
+
+// typeMarshaler returns the sizer and marshaler of a given field.
+// t is the type of the field.
+// tags is the generated "protobuf" tag of the field.
+// If nozero is true, zero value is not marshaled to the wire.
+// If oneof is true, it is a oneof field.
+func typeMarshaler(t reflect.Type, tags []string, nozero, oneof bool) (sizer, marshaler) {
+	encoding := tags[0]
+
+	pointer := false
+	slice := false
+	if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 {
+		slice = true
+		t = t.Elem()
+	}
+	if t.Kind() == reflect.Ptr {
+		pointer = true
+		t = t.Elem()
+	}
+
+	packed := false
+	proto3 := false
+	for i := 2; i < len(tags); i++ {
+		if tags[i] == "packed" {
+			packed = true
+		}
+		if tags[i] == "proto3" {
+			proto3 = true
+		}
+	}
+
+	switch t.Kind() {
+	case reflect.Bool:
+		if pointer {
+			return sizeBoolPtr, appendBoolPtr
+		}
+		if slice {
+			if packed {
+				return sizeBoolPackedSlice, appendBoolPackedSlice
+			}
+			return sizeBoolSlice, appendBoolSlice
+		}
+		if nozero {
+			return sizeBoolValueNoZero, appendBoolValueNoZero
+		}
+		return sizeBoolValue, appendBoolValue
+	case reflect.Uint32:
+		switch encoding {
+		case "fixed32":
+			if pointer {
+				return sizeFixed32Ptr, appendFixed32Ptr
+			}
+			if slice {
+				if packed {
+					return sizeFixed32PackedSlice, appendFixed32PackedSlice
+				}
+				return sizeFixed32Slice, appendFixed32Slice
+			}
+			if nozero {
+				return sizeFixed32ValueNoZero, appendFixed32ValueNoZero
+			}
+			return sizeFixed32Value, appendFixed32Value
+		case "varint":
+			if pointer {
+				return sizeVarint32Ptr, appendVarint32Ptr
+			}
+			if slice {
+				if packed {
+					return sizeVarint32PackedSlice, appendVarint32PackedSlice
+				}
+				return sizeVarint32Slice, appendVarint32Slice
+			}
+			if nozero {
+				return sizeVarint32ValueNoZero, appendVarint32ValueNoZero
+			}
+			return sizeVarint32Value, appendVarint32Value
+		}
+	case reflect.Int32:
+		switch encoding {
+		case "fixed32":
+			if pointer {
+				return sizeFixedS32Ptr, appendFixedS32Ptr
+			}
+			if slice {
+				if packed {
+					return sizeFixedS32PackedSlice, appendFixedS32PackedSlice
+				}
+				return sizeFixedS32Slice, appendFixedS32Slice
+			}
+			if nozero {
+				return sizeFixedS32ValueNoZero, appendFixedS32ValueNoZero
+			}
+			return sizeFixedS32Value, appendFixedS32Value
+		case "varint":
+			if pointer {
+				return sizeVarintS32Ptr, appendVarintS32Ptr
+			}
+			if slice {
+				if packed {
+					return sizeVarintS32PackedSlice, appendVarintS32PackedSlice
+				}
+				return sizeVarintS32Slice, appendVarintS32Slice
+			}
+			if nozero {
+				return sizeVarintS32ValueNoZero, appendVarintS32ValueNoZero
+			}
+			return sizeVarintS32Value, appendVarintS32Value
+		case "zigzag32":
+			if pointer {
+				return sizeZigzag32Ptr, appendZigzag32Ptr
+			}
+			if slice {
+				if packed {
+					return sizeZigzag32PackedSlice, appendZigzag32PackedSlice
+				}
+				return sizeZigzag32Slice, appendZigzag32Slice
+			}
+			if nozero {
+				return sizeZigzag32ValueNoZero, appendZigzag32ValueNoZero
+			}
+			return sizeZigzag32Value, appendZigzag32Value
+		}
+	case reflect.Uint64:
+		switch encoding {
+		case "fixed64":
+			if pointer {
+				return sizeFixed64Ptr, appendFixed64Ptr
+			}
+			if slice {
+				if packed {
+					return sizeFixed64PackedSlice, appendFixed64PackedSlice
+				}
+				return sizeFixed64Slice, appendFixed64Slice
+			}
+			if nozero {
+				return sizeFixed64ValueNoZero, appendFixed64ValueNoZero
+			}
+			return sizeFixed64Value, appendFixed64Value
+		case "varint":
+			if pointer {
+				return sizeVarint64Ptr, appendVarint64Ptr
+			}
+			if slice {
+				if packed {
+					return sizeVarint64PackedSlice, appendVarint64PackedSlice
+				}
+				return sizeVarint64Slice, appendVarint64Slice
+			}
+			if nozero {
+				return sizeVarint64ValueNoZero, appendVarint64ValueNoZero
+			}
+			return sizeVarint64Value, appendVarint64Value
+		}
+	case reflect.Int64:
+		switch encoding {
+		case "fixed64":
+			if pointer {
+				return sizeFixedS64Ptr, appendFixedS64Ptr
+			}
+			if slice {
+				if packed {
+					return sizeFixedS64PackedSlice, appendFixedS64PackedSlice
+				}
+				return sizeFixedS64Slice, appendFixedS64Slice
+			}
+			if nozero {
+				return sizeFixedS64ValueNoZero, appendFixedS64ValueNoZero
+			}
+			return sizeFixedS64Value, appendFixedS64Value
+		case "varint":
+			if pointer {
+				return sizeVarintS64Ptr, appendVarintS64Ptr
+			}
+			if slice {
+				if packed {
+					return sizeVarintS64PackedSlice, appendVarintS64PackedSlice
+				}
+				return sizeVarintS64Slice, appendVarintS64Slice
+			}
+			if nozero {
+				return sizeVarintS64ValueNoZero, appendVarintS64ValueNoZero
+			}
+			return sizeVarintS64Value, appendVarintS64Value
+		case "zigzag64":
+			if pointer {
+				return sizeZigzag64Ptr, appendZigzag64Ptr
+			}
+			if slice {
+				if packed {
+					return sizeZigzag64PackedSlice, appendZigzag64PackedSlice
+				}
+				return sizeZigzag64Slice, appendZigzag64Slice
+			}
+			if nozero {
+				return sizeZigzag64ValueNoZero, appendZigzag64ValueNoZero
+			}
+			return sizeZigzag64Value, appendZigzag64Value
+		}
+	case reflect.Float32:
+		if pointer {
+			return sizeFloat32Ptr, appendFloat32Ptr
+		}
+		if slice {
+			if packed {
+				return sizeFloat32PackedSlice, appendFloat32PackedSlice
+			}
+			return sizeFloat32Slice, appendFloat32Slice
+		}
+		if nozero {
+			return sizeFloat32ValueNoZero, appendFloat32ValueNoZero
+		}
+		return sizeFloat32Value, appendFloat32Value
+	case reflect.Float64:
+		if pointer {
+			return sizeFloat64Ptr, appendFloat64Ptr
+		}
+		if slice {
+			if packed {
+				return sizeFloat64PackedSlice, appendFloat64PackedSlice
+			}
+			return sizeFloat64Slice, appendFloat64Slice
+		}
+		if nozero {
+			return sizeFloat64ValueNoZero, appendFloat64ValueNoZero
+		}
+		return sizeFloat64Value, appendFloat64Value
+	case reflect.String:
+		if pointer {
+			return sizeStringPtr, appendStringPtr
+		}
+		if slice {
+			return sizeStringSlice, appendStringSlice
+		}
+		if nozero {
+			return sizeStringValueNoZero, appendStringValueNoZero
+		}
+		return sizeStringValue, appendStringValue
+	case reflect.Slice:
+		if slice {
+			return sizeBytesSlice, appendBytesSlice
+		}
+		if oneof {
+			// Oneof bytes field may also have "proto3" tag.
+			// We want to marshal it as a oneof field. Do this
+			// check before the proto3 check.
+			return sizeBytesOneof, appendBytesOneof
+		}
+		if proto3 {
+			return sizeBytes3, appendBytes3
+		}
+		return sizeBytes, appendBytes
+	case reflect.Struct:
+		switch encoding {
+		case "group":
+			if slice {
+				return makeGroupSliceMarshaler(getMarshalInfo(t))
+			}
+			return makeGroupMarshaler(getMarshalInfo(t))
+		case "bytes":
+			if slice {
+				return makeMessageSliceMarshaler(getMarshalInfo(t))
+			}
+			return makeMessageMarshaler(getMarshalInfo(t))
+		}
+	}
+	panic(fmt.Sprintf("unknown or mismatched type: type: %v, wire type: %v", t, encoding))
+}
+
+// Below are functions to size/marshal a specific type of a field.
+// They are stored in the field's info, and called by function pointers.
+// They have type sizer or marshaler.
+
+func sizeFixed32Value(_ pointer, tagsize int) int {
+	return 4 + tagsize
+}
+func sizeFixed32ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toUint32()
+	if v == 0 {
+		return 0
+	}
+	return 4 + tagsize
+}
+func sizeFixed32Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toUint32Ptr()
+	if p == nil {
+		return 0
+	}
+	return 4 + tagsize
+}
+func sizeFixed32Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint32Slice()
+	return (4 + tagsize) * len(s)
+}
+func sizeFixed32PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint32Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	return 4*len(s) + SizeVarint(uint64(4*len(s))) + tagsize
+}
+func sizeFixedS32Value(_ pointer, tagsize int) int {
+	return 4 + tagsize
+}
+func sizeFixedS32ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toInt32()
+	if v == 0 {
+		return 0
+	}
+	return 4 + tagsize
+}
+func sizeFixedS32Ptr(ptr pointer, tagsize int) int {
+	p := ptr.getInt32Ptr()
+	if p == nil {
+		return 0
+	}
+	return 4 + tagsize
+}
+func sizeFixedS32Slice(ptr pointer, tagsize int) int {
+	s := ptr.getInt32Slice()
+	return (4 + tagsize) * len(s)
+}
+func sizeFixedS32PackedSlice(ptr pointer, tagsize int) int {
+	s := ptr.getInt32Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	return 4*len(s) + SizeVarint(uint64(4*len(s))) + tagsize
+}
+func sizeFloat32Value(_ pointer, tagsize int) int {
+	return 4 + tagsize
+}
+func sizeFloat32ValueNoZero(ptr pointer, tagsize int) int {
+	v := math.Float32bits(*ptr.toFloat32())
+	if v == 0 {
+		return 0
+	}
+	return 4 + tagsize
+}
+func sizeFloat32Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toFloat32Ptr()
+	if p == nil {
+		return 0
+	}
+	return 4 + tagsize
+}
+func sizeFloat32Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toFloat32Slice()
+	return (4 + tagsize) * len(s)
+}
+func sizeFloat32PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toFloat32Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	return 4*len(s) + SizeVarint(uint64(4*len(s))) + tagsize
+}
+func sizeFixed64Value(_ pointer, tagsize int) int {
+	return 8 + tagsize
+}
+func sizeFixed64ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toUint64()
+	if v == 0 {
+		return 0
+	}
+	return 8 + tagsize
+}
+func sizeFixed64Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toUint64Ptr()
+	if p == nil {
+		return 0
+	}
+	return 8 + tagsize
+}
+func sizeFixed64Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint64Slice()
+	return (8 + tagsize) * len(s)
+}
+func sizeFixed64PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint64Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	return 8*len(s) + SizeVarint(uint64(8*len(s))) + tagsize
+}
+func sizeFixedS64Value(_ pointer, tagsize int) int {
+	return 8 + tagsize
+}
+func sizeFixedS64ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toInt64()
+	if v == 0 {
+		return 0
+	}
+	return 8 + tagsize
+}
+func sizeFixedS64Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toInt64Ptr()
+	if p == nil {
+		return 0
+	}
+	return 8 + tagsize
+}
+func sizeFixedS64Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toInt64Slice()
+	return (8 + tagsize) * len(s)
+}
+func sizeFixedS64PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toInt64Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	return 8*len(s) + SizeVarint(uint64(8*len(s))) + tagsize
+}
+func sizeFloat64Value(_ pointer, tagsize int) int {
+	return 8 + tagsize
+}
+func sizeFloat64ValueNoZero(ptr pointer, tagsize int) int {
+	v := math.Float64bits(*ptr.toFloat64())
+	if v == 0 {
+		return 0
+	}
+	return 8 + tagsize
+}
+func sizeFloat64Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toFloat64Ptr()
+	if p == nil {
+		return 0
+	}
+	return 8 + tagsize
+}
+func sizeFloat64Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toFloat64Slice()
+	return (8 + tagsize) * len(s)
+}
+func sizeFloat64PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toFloat64Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	return 8*len(s) + SizeVarint(uint64(8*len(s))) + tagsize
+}
+func sizeVarint32Value(ptr pointer, tagsize int) int {
+	v := *ptr.toUint32()
+	return SizeVarint(uint64(v)) + tagsize
+}
+func sizeVarint32ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toUint32()
+	if v == 0 {
+		return 0
+	}
+	return SizeVarint(uint64(v)) + tagsize
+}
+func sizeVarint32Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toUint32Ptr()
+	if p == nil {
+		return 0
+	}
+	return SizeVarint(uint64(*p)) + tagsize
+}
+func sizeVarint32Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint32Slice()
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v)) + tagsize
+	}
+	return n
+}
+func sizeVarint32PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint32Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v))
+	}
+	return n + SizeVarint(uint64(n)) + tagsize
+}
+func sizeVarintS32Value(ptr pointer, tagsize int) int {
+	v := *ptr.toInt32()
+	return SizeVarint(uint64(v)) + tagsize
+}
+func sizeVarintS32ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toInt32()
+	if v == 0 {
+		return 0
+	}
+	return SizeVarint(uint64(v)) + tagsize
+}
+func sizeVarintS32Ptr(ptr pointer, tagsize int) int {
+	p := ptr.getInt32Ptr()
+	if p == nil {
+		return 0
+	}
+	return SizeVarint(uint64(*p)) + tagsize
+}
+func sizeVarintS32Slice(ptr pointer, tagsize int) int {
+	s := ptr.getInt32Slice()
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v)) + tagsize
+	}
+	return n
+}
+func sizeVarintS32PackedSlice(ptr pointer, tagsize int) int {
+	s := ptr.getInt32Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v))
+	}
+	return n + SizeVarint(uint64(n)) + tagsize
+}
+func sizeVarint64Value(ptr pointer, tagsize int) int {
+	v := *ptr.toUint64()
+	return SizeVarint(v) + tagsize
+}
+func sizeVarint64ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toUint64()
+	if v == 0 {
+		return 0
+	}
+	return SizeVarint(v) + tagsize
+}
+func sizeVarint64Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toUint64Ptr()
+	if p == nil {
+		return 0
+	}
+	return SizeVarint(*p) + tagsize
+}
+func sizeVarint64Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint64Slice()
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(v) + tagsize
+	}
+	return n
+}
+func sizeVarint64PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toUint64Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(v)
+	}
+	return n + SizeVarint(uint64(n)) + tagsize
+}
+func sizeVarintS64Value(ptr pointer, tagsize int) int {
+	v := *ptr.toInt64()
+	return SizeVarint(uint64(v)) + tagsize
+}
+func sizeVarintS64ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toInt64()
+	if v == 0 {
+		return 0
+	}
+	return SizeVarint(uint64(v)) + tagsize
+}
+func sizeVarintS64Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toInt64Ptr()
+	if p == nil {
+		return 0
+	}
+	return SizeVarint(uint64(*p)) + tagsize
+}
+func sizeVarintS64Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toInt64Slice()
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v)) + tagsize
+	}
+	return n
+}
+func sizeVarintS64PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toInt64Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v))
+	}
+	return n + SizeVarint(uint64(n)) + tagsize
+}
+func sizeZigzag32Value(ptr pointer, tagsize int) int {
+	v := *ptr.toInt32()
+	return SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
+}
+func sizeZigzag32ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toInt32()
+	if v == 0 {
+		return 0
+	}
+	return SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
+}
+func sizeZigzag32Ptr(ptr pointer, tagsize int) int {
+	p := ptr.getInt32Ptr()
+	if p == nil {
+		return 0
+	}
+	v := *p
+	return SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
+}
+func sizeZigzag32Slice(ptr pointer, tagsize int) int {
+	s := ptr.getInt32Slice()
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64((uint32(v)<<1)^uint32((int32(v)>>31)))) + tagsize
+	}
+	return n
+}
+func sizeZigzag32PackedSlice(ptr pointer, tagsize int) int {
+	s := ptr.getInt32Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64((uint32(v) << 1) ^ uint32((int32(v) >> 31))))
+	}
+	return n + SizeVarint(uint64(n)) + tagsize
+}
+func sizeZigzag64Value(ptr pointer, tagsize int) int {
+	v := *ptr.toInt64()
+	return SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
+}
+func sizeZigzag64ValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toInt64()
+	if v == 0 {
+		return 0
+	}
+	return SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
+}
+func sizeZigzag64Ptr(ptr pointer, tagsize int) int {
+	p := *ptr.toInt64Ptr()
+	if p == nil {
+		return 0
+	}
+	v := *p
+	return SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
+}
+func sizeZigzag64Slice(ptr pointer, tagsize int) int {
+	s := *ptr.toInt64Slice()
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v<<1)^uint64((int64(v)>>63))) + tagsize
+	}
+	return n
+}
+func sizeZigzag64PackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toInt64Slice()
+	if len(s) == 0 {
+		return 0
+	}
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v<<1) ^ uint64((int64(v) >> 63)))
+	}
+	return n + SizeVarint(uint64(n)) + tagsize
+}
+func sizeBoolValue(_ pointer, tagsize int) int {
+	return 1 + tagsize
+}
+func sizeBoolValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toBool()
+	if !v {
+		return 0
+	}
+	return 1 + tagsize
+}
+func sizeBoolPtr(ptr pointer, tagsize int) int {
+	p := *ptr.toBoolPtr()
+	if p == nil {
+		return 0
+	}
+	return 1 + tagsize
+}
+func sizeBoolSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toBoolSlice()
+	return (1 + tagsize) * len(s)
+}
+func sizeBoolPackedSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toBoolSlice()
+	if len(s) == 0 {
+		return 0
+	}
+	return len(s) + SizeVarint(uint64(len(s))) + tagsize
+}
+func sizeStringValue(ptr pointer, tagsize int) int {
+	v := *ptr.toString()
+	return len(v) + SizeVarint(uint64(len(v))) + tagsize
+}
+func sizeStringValueNoZero(ptr pointer, tagsize int) int {
+	v := *ptr.toString()
+	if v == "" {
+		return 0
+	}
+	return len(v) + SizeVarint(uint64(len(v))) + tagsize
+}
+func sizeStringPtr(ptr pointer, tagsize int) int {
+	p := *ptr.toStringPtr()
+	if p == nil {
+		return 0
+	}
+	v := *p
+	return len(v) + SizeVarint(uint64(len(v))) + tagsize
+}
+func sizeStringSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toStringSlice()
+	n := 0
+	for _, v := range s {
+		n += len(v) + SizeVarint(uint64(len(v))) + tagsize
+	}
+	return n
+}
+func sizeBytes(ptr pointer, tagsize int) int {
+	v := *ptr.toBytes()
+	if v == nil {
+		return 0
+	}
+	return len(v) + SizeVarint(uint64(len(v))) + tagsize
+}
+func sizeBytes3(ptr pointer, tagsize int) int {
+	v := *ptr.toBytes()
+	if len(v) == 0 {
+		return 0
+	}
+	return len(v) + SizeVarint(uint64(len(v))) + tagsize
+}
+func sizeBytesOneof(ptr pointer, tagsize int) int {
+	v := *ptr.toBytes()
+	return len(v) + SizeVarint(uint64(len(v))) + tagsize
+}
+func sizeBytesSlice(ptr pointer, tagsize int) int {
+	s := *ptr.toBytesSlice()
+	n := 0
+	for _, v := range s {
+		n += len(v) + SizeVarint(uint64(len(v))) + tagsize
+	}
+	return n
+}
+
+// appendFixed32 appends an encoded fixed32 to b.
+func appendFixed32(b []byte, v uint32) []byte {
+	b = append(b,
+		byte(v),
+		byte(v>>8),
+		byte(v>>16),
+		byte(v>>24))
+	return b
+}
+
+// appendFixed64 appends an encoded fixed64 to b.
+func appendFixed64(b []byte, v uint64) []byte {
+	b = append(b,
+		byte(v),
+		byte(v>>8),
+		byte(v>>16),
+		byte(v>>24),
+		byte(v>>32),
+		byte(v>>40),
+		byte(v>>48),
+		byte(v>>56))
+	return b
+}
+
+// appendVarint appends an encoded varint to b.
+func appendVarint(b []byte, v uint64) []byte {
+	// TODO: make 1-byte (maybe 2-byte) case inline-able, once we
+	// have non-leaf inliner.
+	switch {
+	case v < 1<<7:
+		b = append(b, byte(v))
+	case v < 1<<14:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte(v>>7))
+	case v < 1<<21:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte(v>>14))
+	case v < 1<<28:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte((v>>14)&0x7f|0x80),
+			byte(v>>21))
+	case v < 1<<35:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte((v>>14)&0x7f|0x80),
+			byte((v>>21)&0x7f|0x80),
+			byte(v>>28))
+	case v < 1<<42:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte((v>>14)&0x7f|0x80),
+			byte((v>>21)&0x7f|0x80),
+			byte((v>>28)&0x7f|0x80),
+			byte(v>>35))
+	case v < 1<<49:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte((v>>14)&0x7f|0x80),
+			byte((v>>21)&0x7f|0x80),
+			byte((v>>28)&0x7f|0x80),
+			byte((v>>35)&0x7f|0x80),
+			byte(v>>42))
+	case v < 1<<56:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte((v>>14)&0x7f|0x80),
+			byte((v>>21)&0x7f|0x80),
+			byte((v>>28)&0x7f|0x80),
+			byte((v>>35)&0x7f|0x80),
+			byte((v>>42)&0x7f|0x80),
+			byte(v>>49))
+	case v < 1<<63:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte((v>>14)&0x7f|0x80),
+			byte((v>>21)&0x7f|0x80),
+			byte((v>>28)&0x7f|0x80),
+			byte((v>>35)&0x7f|0x80),
+			byte((v>>42)&0x7f|0x80),
+			byte((v>>49)&0x7f|0x80),
+			byte(v>>56))
+	default:
+		b = append(b,
+			byte(v&0x7f|0x80),
+			byte((v>>7)&0x7f|0x80),
+			byte((v>>14)&0x7f|0x80),
+			byte((v>>21)&0x7f|0x80),
+			byte((v>>28)&0x7f|0x80),
+			byte((v>>35)&0x7f|0x80),
+			byte((v>>42)&0x7f|0x80),
+			byte((v>>49)&0x7f|0x80),
+			byte((v>>56)&0x7f|0x80),
+			1)
+	}
+	return b
+}
+
+func appendFixed32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint32()
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, v)
+	return b, nil
+}
+func appendFixed32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint32()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, v)
+	return b, nil
+}
+func appendFixed32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toUint32Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, *p)
+	return b, nil
+}
+func appendFixed32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint32Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendFixed32(b, v)
+	}
+	return b, nil
+}
+func appendFixed32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint32Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	b = appendVarint(b, uint64(4*len(s)))
+	for _, v := range s {
+		b = appendFixed32(b, v)
+	}
+	return b, nil
+}
+func appendFixedS32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt32()
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, uint32(v))
+	return b, nil
+}
+func appendFixedS32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt32()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, uint32(v))
+	return b, nil
+}
+func appendFixedS32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := ptr.getInt32Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, uint32(*p))
+	return b, nil
+}
+func appendFixedS32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := ptr.getInt32Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendFixed32(b, uint32(v))
+	}
+	return b, nil
+}
+func appendFixedS32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := ptr.getInt32Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	b = appendVarint(b, uint64(4*len(s)))
+	for _, v := range s {
+		b = appendFixed32(b, uint32(v))
+	}
+	return b, nil
+}
+func appendFloat32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := math.Float32bits(*ptr.toFloat32())
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, v)
+	return b, nil
+}
+func appendFloat32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := math.Float32bits(*ptr.toFloat32())
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, v)
+	return b, nil
+}
+func appendFloat32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toFloat32Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed32(b, math.Float32bits(*p))
+	return b, nil
+}
+func appendFloat32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toFloat32Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendFixed32(b, math.Float32bits(v))
+	}
+	return b, nil
+}
+func appendFloat32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toFloat32Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	b = appendVarint(b, uint64(4*len(s)))
+	for _, v := range s {
+		b = appendFixed32(b, math.Float32bits(v))
+	}
+	return b, nil
+}
+func appendFixed64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint64()
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, v)
+	return b, nil
+}
+func appendFixed64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint64()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, v)
+	return b, nil
+}
+func appendFixed64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toUint64Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, *p)
+	return b, nil
+}
+func appendFixed64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint64Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendFixed64(b, v)
+	}
+	return b, nil
+}
+func appendFixed64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint64Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	b = appendVarint(b, uint64(8*len(s)))
+	for _, v := range s {
+		b = appendFixed64(b, v)
+	}
+	return b, nil
+}
+func appendFixedS64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt64()
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, uint64(v))
+	return b, nil
+}
+func appendFixedS64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt64()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, uint64(v))
+	return b, nil
+}
+func appendFixedS64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toInt64Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, uint64(*p))
+	return b, nil
+}
+func appendFixedS64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toInt64Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendFixed64(b, uint64(v))
+	}
+	return b, nil
+}
+func appendFixedS64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toInt64Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	b = appendVarint(b, uint64(8*len(s)))
+	for _, v := range s {
+		b = appendFixed64(b, uint64(v))
+	}
+	return b, nil
+}
+func appendFloat64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := math.Float64bits(*ptr.toFloat64())
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, v)
+	return b, nil
+}
+func appendFloat64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := math.Float64bits(*ptr.toFloat64())
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, v)
+	return b, nil
+}
+func appendFloat64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toFloat64Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendFixed64(b, math.Float64bits(*p))
+	return b, nil
+}
+func appendFloat64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toFloat64Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendFixed64(b, math.Float64bits(v))
+	}
+	return b, nil
+}
+func appendFloat64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toFloat64Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	b = appendVarint(b, uint64(8*len(s)))
+	for _, v := range s {
+		b = appendFixed64(b, math.Float64bits(v))
+	}
+	return b, nil
+}
+func appendVarint32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint32()
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v))
+	return b, nil
+}
+func appendVarint32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint32()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v))
+	return b, nil
+}
+func appendVarint32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toUint32Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(*p))
+	return b, nil
+}
+func appendVarint32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint32Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, uint64(v))
+	}
+	return b, nil
+}
+func appendVarint32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint32Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	// compute size
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v))
+	}
+	b = appendVarint(b, uint64(n))
+	for _, v := range s {
+		b = appendVarint(b, uint64(v))
+	}
+	return b, nil
+}
+func appendVarintS32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt32()
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v))
+	return b, nil
+}
+func appendVarintS32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt32()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v))
+	return b, nil
+}
+func appendVarintS32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := ptr.getInt32Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(*p))
+	return b, nil
+}
+func appendVarintS32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := ptr.getInt32Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, uint64(v))
+	}
+	return b, nil
+}
+func appendVarintS32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := ptr.getInt32Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	// compute size
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v))
+	}
+	b = appendVarint(b, uint64(n))
+	for _, v := range s {
+		b = appendVarint(b, uint64(v))
+	}
+	return b, nil
+}
+func appendVarint64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint64()
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, v)
+	return b, nil
+}
+func appendVarint64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toUint64()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, v)
+	return b, nil
+}
+func appendVarint64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toUint64Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, *p)
+	return b, nil
+}
+func appendVarint64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint64Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, v)
+	}
+	return b, nil
+}
+func appendVarint64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toUint64Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	// compute size
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(v)
+	}
+	b = appendVarint(b, uint64(n))
+	for _, v := range s {
+		b = appendVarint(b, v)
+	}
+	return b, nil
+}
+func appendVarintS64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt64()
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v))
+	return b, nil
+}
+func appendVarintS64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt64()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v))
+	return b, nil
+}
+func appendVarintS64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toInt64Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(*p))
+	return b, nil
+}
+func appendVarintS64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toInt64Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, uint64(v))
+	}
+	return b, nil
+}
+func appendVarintS64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toInt64Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	// compute size
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v))
+	}
+	b = appendVarint(b, uint64(n))
+	for _, v := range s {
+		b = appendVarint(b, uint64(v))
+	}
+	return b, nil
+}
+func appendZigzag32Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt32()
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
+	return b, nil
+}
+func appendZigzag32ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt32()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
+	return b, nil
+}
+func appendZigzag32Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := ptr.getInt32Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	v := *p
+	b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
+	return b, nil
+}
+func appendZigzag32Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := ptr.getInt32Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
+	}
+	return b, nil
+}
+func appendZigzag32PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := ptr.getInt32Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	// compute size
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64((uint32(v) << 1) ^ uint32((int32(v) >> 31))))
+	}
+	b = appendVarint(b, uint64(n))
+	for _, v := range s {
+		b = appendVarint(b, uint64((uint32(v)<<1)^uint32((int32(v)>>31))))
+	}
+	return b, nil
+}
+func appendZigzag64Value(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt64()
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
+	return b, nil
+}
+func appendZigzag64ValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toInt64()
+	if v == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
+	return b, nil
+}
+func appendZigzag64Ptr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toInt64Ptr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	v := *p
+	b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
+	return b, nil
+}
+func appendZigzag64Slice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toInt64Slice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
+	}
+	return b, nil
+}
+func appendZigzag64PackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toInt64Slice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	// compute size
+	n := 0
+	for _, v := range s {
+		n += SizeVarint(uint64(v<<1) ^ uint64((int64(v) >> 63)))
+	}
+	b = appendVarint(b, uint64(n))
+	for _, v := range s {
+		b = appendVarint(b, uint64(v<<1)^uint64((int64(v)>>63)))
+	}
+	return b, nil
+}
+func appendBoolValue(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toBool()
+	b = appendVarint(b, wiretag)
+	if v {
+		b = append(b, 1)
+	} else {
+		b = append(b, 0)
+	}
+	return b, nil
+}
+func appendBoolValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toBool()
+	if !v {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = append(b, 1)
+	return b, nil
+}
+
+func appendBoolPtr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toBoolPtr()
+	if p == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	if *p {
+		b = append(b, 1)
+	} else {
+		b = append(b, 0)
+	}
+	return b, nil
+}
+func appendBoolSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toBoolSlice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		if v {
+			b = append(b, 1)
+		} else {
+			b = append(b, 0)
+		}
+	}
+	return b, nil
+}
+func appendBoolPackedSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toBoolSlice()
+	if len(s) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag&^7|WireBytes)
+	b = appendVarint(b, uint64(len(s)))
+	for _, v := range s {
+		if v {
+			b = append(b, 1)
+		} else {
+			b = append(b, 0)
+		}
+	}
+	return b, nil
+}
+func appendStringValue(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toString()
+	if !utf8.ValidString(v) {
+		return nil, errInvalidUTF8
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(len(v)))
+	b = append(b, v...)
+	return b, nil
+}
+func appendStringValueNoZero(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toString()
+	if v == "" {
+		return b, nil
+	}
+	if !utf8.ValidString(v) {
+		return nil, errInvalidUTF8
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(len(v)))
+	b = append(b, v...)
+	return b, nil
+}
+func appendStringPtr(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	p := *ptr.toStringPtr()
+	if p == nil {
+		return b, nil
+	}
+	v := *p
+	if !utf8.ValidString(v) {
+		return nil, errInvalidUTF8
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(len(v)))
+	b = append(b, v...)
+	return b, nil
+}
+func appendStringSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toStringSlice()
+	for _, v := range s {
+		if !utf8.ValidString(v) {
+			return nil, errInvalidUTF8
+		}
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, uint64(len(v)))
+		b = append(b, v...)
+	}
+	return b, nil
+}
+func appendBytes(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toBytes()
+	if v == nil {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(len(v)))
+	b = append(b, v...)
+	return b, nil
+}
+func appendBytes3(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toBytes()
+	if len(v) == 0 {
+		return b, nil
+	}
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(len(v)))
+	b = append(b, v...)
+	return b, nil
+}
+func appendBytesOneof(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	v := *ptr.toBytes()
+	b = appendVarint(b, wiretag)
+	b = appendVarint(b, uint64(len(v)))
+	b = append(b, v...)
+	return b, nil
+}
+func appendBytesSlice(b []byte, ptr pointer, wiretag uint64, _ bool) ([]byte, error) {
+	s := *ptr.toBytesSlice()
+	for _, v := range s {
+		b = appendVarint(b, wiretag)
+		b = appendVarint(b, uint64(len(v)))
+		b = append(b, v...)
+	}
+	return b, nil
+}
+
+// makeGroupMarshaler returns the sizer and marshaler for a group.
+// u is the marshal info of the underlying message.
+func makeGroupMarshaler(u *marshalInfo) (sizer, marshaler) {
+	return func(ptr pointer, tagsize int) int {
+			p := ptr.getPointer()
+			if p.isNil() {
+				return 0
+			}
+			return u.size(p) + 2*tagsize
+		},
+		func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
+			p := ptr.getPointer()
+			if p.isNil() {
+				return b, nil
+			}
+			var err error
+			b = appendVarint(b, wiretag) // start group
+			b, err = u.marshal(b, p, deterministic)
+			b = appendVarint(b, wiretag+(WireEndGroup-WireStartGroup)) // end group
+			return b, err
+		}
+}
+
+// makeGroupSliceMarshaler returns the sizer and marshaler for a group slice.
+// u is the marshal info of the underlying message.
+func makeGroupSliceMarshaler(u *marshalInfo) (sizer, marshaler) {
+	return func(ptr pointer, tagsize int) int {
+			s := ptr.getPointerSlice()
+			n := 0
+			for _, v := range s {
+				if v.isNil() {
+					continue
+				}
+				n += u.size(v) + 2*tagsize
+			}
+			return n
+		},
+		func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
+			s := ptr.getPointerSlice()
+			var err, errreq error
+			for _, v := range s {
+				if v.isNil() {
+					return b, errRepeatedHasNil
+				}
+				b = appendVarint(b, wiretag) // start group
+				b, err = u.marshal(b, v, deterministic)
+				b = appendVarint(b, wiretag+(WireEndGroup-WireStartGroup)) // end group
+				if err != nil {
+					if _, ok := err.(*RequiredNotSetError); ok {
+						// Required field in submessage is not set.
+						// We record the error but keep going, to give a complete marshaling.
+						if errreq == nil {
+							errreq = err
+						}
+						continue
+					}
+					if err == ErrNil {
+						err = errRepeatedHasNil
+					}
+					return b, err
+				}
+			}
+			return b, errreq
+		}
+}
+
+// makeMessageMarshaler returns the sizer and marshaler for a message field.
+// u is the marshal info of the message.
+func makeMessageMarshaler(u *marshalInfo) (sizer, marshaler) {
+	return func(ptr pointer, tagsize int) int {
+			p := ptr.getPointer()
+			if p.isNil() {
+				return 0
+			}
+			siz := u.size(p)
+			return siz + SizeVarint(uint64(siz)) + tagsize
+		},
+		func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
+			p := ptr.getPointer()
+			if p.isNil() {
+				return b, nil
+			}
+			b = appendVarint(b, wiretag)
+			siz := u.cachedsize(p)
+			b = appendVarint(b, uint64(siz))
+			return u.marshal(b, p, deterministic)
+		}
+}
+
+// makeMessageSliceMarshaler returns the sizer and marshaler for a message slice.
+// u is the marshal info of the message.
+func makeMessageSliceMarshaler(u *marshalInfo) (sizer, marshaler) {
+	return func(ptr pointer, tagsize int) int {
+			s := ptr.getPointerSlice()
+			n := 0
+			for _, v := range s {
+				if v.isNil() {
+					continue
+				}
+				siz := u.size(v)
+				n += siz + SizeVarint(uint64(siz)) + tagsize
+			}
+			return n
+		},
+		func(b []byte, ptr pointer, wiretag uint64, deterministic bool) ([]byte, error) {
+			s := ptr.getPointerSlice()
+			var err, errreq error
+			for _, v := range s {
+				if v.isNil() {
+					return b, errRepeatedHasNil
+				}
+				b = appendVarint(b, wiretag)
+				siz := u.cachedsize(v)
+				b = appendVarint(b, uint64(siz))
+				b, err = u.marshal(b, v, deterministic)
+
+				if err != nil {
+					if _, ok := err.(*RequiredNotSetError); ok {
+						// Required field in submessage is not set.
+						// We record the error but keep going, to give a complete marshaling.
+						if errreq == nil {
+							errreq = err
+						}
+						continue
+					}
+					if err == ErrNil {
+						err = errRepeatedHasNil
+					}
+					return b, err
+				}
+			}
+			return b, errreq
+		}
+}
+
+// makeMapMarshaler returns the sizer and marshaler for a map field.
+// f is the pointer to the reflect data structure of the field.
+func makeMapMarshaler(f *reflect.StructField) (sizer, marshaler) {
+	// figure out key and value type
+	t := f.Type
+	keyType := t.Key()
+	valType := t.Elem()
+	keyTags := strings.Split(f.Tag.Get("protobuf_key"), ",")
+	valTags := strings.Split(f.Tag.Get("protobuf_val"), ",")
+	keySizer, keyMarshaler := typeMarshaler(keyType, keyTags, false, false) // don't omit zero value in map
+	valSizer, valMarshaler := typeMarshaler(valType, valTags, false, false) // don't omit zero value in map
+	keyWireTag := 1<<3 | wiretype(keyTags[0])
+	valWireTag := 2<<3 | wiretype(valTags[0])
+
+	// We create an interface to get the addresses of the map key and value.
+	// If value is pointer-typed, the interface is a direct interface, the
+	// idata itself is the value. Otherwise, the idata is the pointer to the
+	// value.
+	// Key cannot be pointer-typed.
+	valIsPtr := valType.Kind() == reflect.Ptr
+	return func(ptr pointer, tagsize int) int {
+			m := ptr.asPointerTo(t).Elem() // the map
+			n := 0
+			for _, k := range m.MapKeys() {
+				ki := k.Interface()
+				vi := m.MapIndex(k).Interface()
+				kaddr := toAddrPointer(&ki, false)             // pointer to key
+				vaddr := toAddrPointer(&vi, valIsPtr)          // pointer to value
+				siz := keySizer(kaddr, 1) + valSizer(vaddr, 1) // tag of key = 1 (size=1), tag of val = 2 (size=1)
+				n += siz + SizeVarint(uint64(siz)) + tagsize
+			}
+			return n
+		},
+		func(b []byte, ptr pointer, tag uint64, deterministic bool) ([]byte, error) {
+			m := ptr.asPointerTo(t).Elem() // the map
+			var err error
+			keys := m.MapKeys()
+			if len(keys) > 1 && deterministic {
+				sort.Sort(mapKeys(keys))
+			}
+			for _, k := range keys {
+				ki := k.Interface()
+				vi := m.MapIndex(k).Interface()
+				kaddr := toAddrPointer(&ki, false)    // pointer to key
+				vaddr := toAddrPointer(&vi, valIsPtr) // pointer to value
+				b = appendVarint(b, tag)
+				siz := keySizer(kaddr, 1) + valSizer(vaddr, 1) // tag of key = 1 (size=1), tag of val = 2 (size=1)
+				b = appendVarint(b, uint64(siz))
+				b, err = keyMarshaler(b, kaddr, keyWireTag, deterministic)
+				if err != nil {
+					return b, err
+				}
+				b, err = valMarshaler(b, vaddr, valWireTag, deterministic)
+				if err != nil && err != ErrNil { // allow nil value in map
+					return b, err
+				}
+			}
+			return b, nil
+		}
+}
+
+// makeOneOfMarshaler returns the sizer and marshaler for a oneof field.
+// fi is the marshal info of the field.
+// f is the pointer to the reflect data structure of the field.
+func makeOneOfMarshaler(fi *marshalFieldInfo, f *reflect.StructField) (sizer, marshaler) {
+	// Oneof field is an interface. We need to get the actual data type on the fly.
+	t := f.Type
+	return func(ptr pointer, _ int) int {
+			p := ptr.getInterfacePointer()
+			if p.isNil() {
+				return 0
+			}
+			v := ptr.asPointerTo(t).Elem().Elem().Elem() // *interface -> interface -> *struct -> struct
+			telem := v.Type()
+			e := fi.oneofElems[telem]
+			return e.sizer(p, e.tagsize)
+		},
+		func(b []byte, ptr pointer, _ uint64, deterministic bool) ([]byte, error) {
+			p := ptr.getInterfacePointer()
+			if p.isNil() {
+				return b, nil
+			}
+			v := ptr.asPointerTo(t).Elem().Elem().Elem() // *interface -> interface -> *struct -> struct
+			telem := v.Type()
+			if telem.Field(0).Type.Kind() == reflect.Ptr && p.getPointer().isNil() {
+				return b, errOneofHasNil
+			}
+			e := fi.oneofElems[telem]
+			return e.marshaler(b, p, e.wiretag, deterministic)
+		}
+}
+
+// sizeExtensions computes the size of encoded data for a XXX_InternalExtensions field.
+func (u *marshalInfo) sizeExtensions(ext *XXX_InternalExtensions) int {
+	m, mu := ext.extensionsRead()
+	if m == nil {
+		return 0
+	}
+	mu.Lock()
+
+	n := 0
+	for _, e := range m {
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			n += len(e.enc)
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+		ei := u.getExtElemInfo(e.desc)
+		v := e.value
+		p := toAddrPointer(&v, ei.isptr)
+		n += ei.sizer(p, ei.tagsize)
+	}
+	mu.Unlock()
+	return n
+}
+
+// appendExtensions marshals a XXX_InternalExtensions field to the end of byte slice b.
+func (u *marshalInfo) appendExtensions(b []byte, ext *XXX_InternalExtensions, deterministic bool) ([]byte, error) {
+	m, mu := ext.extensionsRead()
+	if m == nil {
+		return b, nil
+	}
+	mu.Lock()
+	defer mu.Unlock()
+
+	var err error
+
+	// Fast-path for common cases: zero or one extensions.
+	// Don't bother sorting the keys.
+	if len(m) <= 1 {
+		for _, e := range m {
+			if e.value == nil || e.desc == nil {
+				// Extension is only in its encoded form.
+				b = append(b, e.enc...)
+				continue
+			}
+
+			// We don't skip extensions that have an encoded form set,
+			// because the extension value may have been mutated after
+			// the last time this function was called.
+
+			ei := u.getExtElemInfo(e.desc)
+			v := e.value
+			p := toAddrPointer(&v, ei.isptr)
+			b, err = ei.marshaler(b, p, ei.wiretag, deterministic)
+			if err != nil {
+				return b, err
+			}
+		}
+		return b, nil
+	}
+
+	// Sort the keys to provide a deterministic encoding.
+	// Not sure this is required, but the old code does it.
+	keys := make([]int, 0, len(m))
+	for k := range m {
+		keys = append(keys, int(k))
+	}
+	sort.Ints(keys)
+
+	for _, k := range keys {
+		e := m[int32(k)]
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			b = append(b, e.enc...)
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+
+		ei := u.getExtElemInfo(e.desc)
+		v := e.value
+		p := toAddrPointer(&v, ei.isptr)
+		b, err = ei.marshaler(b, p, ei.wiretag, deterministic)
+		if err != nil {
+			return b, err
+		}
+	}
+	return b, nil
+}
+
+// message set format is:
+//   message MessageSet {
+//     repeated group Item = 1 {
+//       required int32 type_id = 2;
+//       required string message = 3;
+//     };
+//   }
+
+// sizeMessageSet computes the size of encoded data for a XXX_InternalExtensions field
+// in message set format (above).
+func (u *marshalInfo) sizeMessageSet(ext *XXX_InternalExtensions) int {
+	m, mu := ext.extensionsRead()
+	if m == nil {
+		return 0
+	}
+	mu.Lock()
+
+	n := 0
+	for id, e := range m {
+		n += 2                          // start group, end group. tag = 1 (size=1)
+		n += SizeVarint(uint64(id)) + 1 // type_id, tag = 2 (size=1)
+
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			msgWithLen := skipVarint(e.enc) // skip old tag, but leave the length varint
+			siz := len(msgWithLen)
+			n += siz + 1 // message, tag = 3 (size=1)
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+
+		ei := u.getExtElemInfo(e.desc)
+		v := e.value
+		p := toAddrPointer(&v, ei.isptr)
+		n += ei.sizer(p, 1) // message, tag = 3 (size=1)
+	}
+	mu.Unlock()
+	return n
+}
+
+// appendMessageSet marshals a XXX_InternalExtensions field in message set format (above)
+// to the end of byte slice b.
+func (u *marshalInfo) appendMessageSet(b []byte, ext *XXX_InternalExtensions, deterministic bool) ([]byte, error) {
+	m, mu := ext.extensionsRead()
+	if m == nil {
+		return b, nil
+	}
+	mu.Lock()
+	defer mu.Unlock()
+
+	var err error
+
+	// Fast-path for common cases: zero or one extensions.
+	// Don't bother sorting the keys.
+	if len(m) <= 1 {
+		for id, e := range m {
+			b = append(b, 1<<3|WireStartGroup)
+			b = append(b, 2<<3|WireVarint)
+			b = appendVarint(b, uint64(id))
+
+			if e.value == nil || e.desc == nil {
+				// Extension is only in its encoded form.
+				msgWithLen := skipVarint(e.enc) // skip old tag, but leave the length varint
+				b = append(b, 3<<3|WireBytes)
+				b = append(b, msgWithLen...)
+				b = append(b, 1<<3|WireEndGroup)
+				continue
+			}
+
+			// We don't skip extensions that have an encoded form set,
+			// because the extension value may have been mutated after
+			// the last time this function was called.
+
+			ei := u.getExtElemInfo(e.desc)
+			v := e.value
+			p := toAddrPointer(&v, ei.isptr)
+			b, err = ei.marshaler(b, p, 3<<3|WireBytes, deterministic)
+			if err != nil {
+				return b, err
+			}
+			b = append(b, 1<<3|WireEndGroup)
+		}
+		return b, nil
+	}
+
+	// Sort the keys to provide a deterministic encoding.
+	keys := make([]int, 0, len(m))
+	for k := range m {
+		keys = append(keys, int(k))
+	}
+	sort.Ints(keys)
+
+	for _, id := range keys {
+		e := m[int32(id)]
+		b = append(b, 1<<3|WireStartGroup)
+		b = append(b, 2<<3|WireVarint)
+		b = appendVarint(b, uint64(id))
+
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			msgWithLen := skipVarint(e.enc) // skip old tag, but leave the length varint
+			b = append(b, 3<<3|WireBytes)
+			b = append(b, msgWithLen...)
+			b = append(b, 1<<3|WireEndGroup)
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+
+		ei := u.getExtElemInfo(e.desc)
+		v := e.value
+		p := toAddrPointer(&v, ei.isptr)
+		b, err = ei.marshaler(b, p, 3<<3|WireBytes, deterministic)
+		b = append(b, 1<<3|WireEndGroup)
+		if err != nil {
+			return b, err
+		}
+	}
+	return b, nil
+}
+
+// sizeV1Extensions computes the size of encoded data for a V1-API extension field.
+func (u *marshalInfo) sizeV1Extensions(m map[int32]Extension) int {
+	if m == nil {
+		return 0
+	}
+
+	n := 0
+	for _, e := range m {
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			n += len(e.enc)
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+
+		ei := u.getExtElemInfo(e.desc)
+		v := e.value
+		p := toAddrPointer(&v, ei.isptr)
+		n += ei.sizer(p, ei.tagsize)
+	}
+	return n
+}
+
+// appendV1Extensions marshals a V1-API extension field to the end of byte slice b.
+func (u *marshalInfo) appendV1Extensions(b []byte, m map[int32]Extension, deterministic bool) ([]byte, error) {
+	if m == nil {
+		return b, nil
+	}
+
+	// Sort the keys to provide a deterministic encoding.
+	keys := make([]int, 0, len(m))
+	for k := range m {
+		keys = append(keys, int(k))
+	}
+	sort.Ints(keys)
+
+	var err error
+	for _, k := range keys {
+		e := m[int32(k)]
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			b = append(b, e.enc...)
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+
+		ei := u.getExtElemInfo(e.desc)
+		v := e.value
+		p := toAddrPointer(&v, ei.isptr)
+		b, err = ei.marshaler(b, p, ei.wiretag, deterministic)
+		if err != nil {
+			return b, err
+		}
+	}
+	return b, nil
+}
+
+// newMarshaler is the interface representing objects that can marshal themselves.
+//
+// This exists to support protoc-gen-go generated messages.
+// The proto package will stop type-asserting to this interface in the future.
+//
+// DO NOT DEPEND ON THIS.
+type newMarshaler interface {
+	XXX_Size() int
+	XXX_Marshal(b []byte, deterministic bool) ([]byte, error)
+}
+
+// Size returns the encoded size of a protocol buffer message.
+// This is the main entry point.
+func Size(pb Message) int {
+	if m, ok := pb.(newMarshaler); ok {
+		return m.XXX_Size()
+	}
+	if m, ok := pb.(Marshaler); ok {
+		// If the message can marshal itself, let it do it, for compatibility.
+		// NOTE: This is not efficient.
+		b, _ := m.Marshal()
+		return len(b)
+	}
+	// in case somehow we didn't generate the wrapper
+	if pb == nil {
+		return 0
+	}
+	var info InternalMessageInfo
+	return info.Size(pb)
+}
+
+// Marshal takes a protocol buffer message
+// and encodes it into the wire format, returning the data.
+// This is the main entry point.
+func Marshal(pb Message) ([]byte, error) {
+	if m, ok := pb.(newMarshaler); ok {
+		siz := m.XXX_Size()
+		b := make([]byte, 0, siz)
+		return m.XXX_Marshal(b, false)
+	}
+	if m, ok := pb.(Marshaler); ok {
+		// If the message can marshal itself, let it do it, for compatibility.
+		// NOTE: This is not efficient.
+		return m.Marshal()
+	}
+	// in case somehow we didn't generate the wrapper
+	if pb == nil {
+		return nil, ErrNil
+	}
+	var info InternalMessageInfo
+	siz := info.Size(pb)
+	b := make([]byte, 0, siz)
+	return info.Marshal(b, pb, false)
+}
+
+// Marshal takes a protocol buffer message
+// and encodes it into the wire format, writing the result to the
+// Buffer.
+// This is an alternative entry point. It is not necessary to use
+// a Buffer for most applications.
+func (p *Buffer) Marshal(pb Message) error {
+	var err error
+	if m, ok := pb.(newMarshaler); ok {
+		siz := m.XXX_Size()
+		p.grow(siz) // make sure buf has enough capacity
+		p.buf, err = m.XXX_Marshal(p.buf, p.deterministic)
+		return err
+	}
+	if m, ok := pb.(Marshaler); ok {
+		// If the message can marshal itself, let it do it, for compatibility.
+		// NOTE: This is not efficient.
+		b, err := m.Marshal()
+		p.buf = append(p.buf, b...)
+		return err
+	}
+	// in case somehow we didn't generate the wrapper
+	if pb == nil {
+		return ErrNil
+	}
+	var info InternalMessageInfo
+	siz := info.Size(pb)
+	p.grow(siz) // make sure buf has enough capacity
+	p.buf, err = info.Marshal(p.buf, pb, p.deterministic)
+	return err
+}
+
+// grow grows the buffer's capacity, if necessary, to guarantee space for
+// another n bytes. After grow(n), at least n bytes can be written to the
+// buffer without another allocation.
+func (p *Buffer) grow(n int) {
+	need := len(p.buf) + n
+	if need <= cap(p.buf) {
+		return
+	}
+	newCap := len(p.buf) * 2
+	if newCap < need {
+		newCap = need
+	}
+	p.buf = append(make([]byte, 0, newCap), p.buf...)
+}
diff --git a/proto/table_merge.go b/proto/table_merge.go
new file mode 100644
index 0000000..5525def
--- /dev/null
+++ b/proto/table_merge.go
@@ -0,0 +1,654 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"sync"
+	"sync/atomic"
+)
+
+// Merge merges the src message into dst.
+// This assumes that dst and src of the same type and are non-nil.
+func (a *InternalMessageInfo) Merge(dst, src Message) {
+	mi := atomicLoadMergeInfo(&a.merge)
+	if mi == nil {
+		mi = getMergeInfo(reflect.TypeOf(dst).Elem())
+		atomicStoreMergeInfo(&a.merge, mi)
+	}
+	mi.merge(toPointer(&dst), toPointer(&src))
+}
+
+type mergeInfo struct {
+	typ reflect.Type
+
+	initialized int32 // 0: only typ is valid, 1: everything is valid
+	lock        sync.Mutex
+
+	fields       []mergeFieldInfo
+	unrecognized field // Offset of XXX_unrecognized
+}
+
+type mergeFieldInfo struct {
+	field field // Offset of field, guaranteed to be valid
+
+	// isPointer reports whether the value in the field is a pointer.
+	// This is true for the following situations:
+	//	* Pointer to struct
+	//	* Pointer to basic type (proto2 only)
+	//	* Slice (first value in slice header is a pointer)
+	//	* String (first value in string header is a pointer)
+	isPointer bool
+
+	// basicWidth reports the width of the field assuming that it is directly
+	// embedded in the struct (as is the case for basic types in proto3).
+	// The possible values are:
+	// 	0: invalid
+	//	1: bool
+	//	4: int32, uint32, float32
+	//	8: int64, uint64, float64
+	basicWidth int
+
+	// Where dst and src are pointers to the types being merged.
+	merge func(dst, src pointer)
+}
+
+var (
+	mergeInfoMap  = map[reflect.Type]*mergeInfo{}
+	mergeInfoLock sync.Mutex
+)
+
+func getMergeInfo(t reflect.Type) *mergeInfo {
+	mergeInfoLock.Lock()
+	defer mergeInfoLock.Unlock()
+	mi := mergeInfoMap[t]
+	if mi == nil {
+		mi = &mergeInfo{typ: t}
+		mergeInfoMap[t] = mi
+	}
+	return mi
+}
+
+// merge merges src into dst assuming they are both of type *mi.typ.
+func (mi *mergeInfo) merge(dst, src pointer) {
+	if dst.isNil() {
+		panic("proto: nil destination")
+	}
+	if src.isNil() {
+		return // Nothing to do.
+	}
+
+	if atomic.LoadInt32(&mi.initialized) == 0 {
+		mi.computeMergeInfo()
+	}
+
+	for _, fi := range mi.fields {
+		sfp := src.offset(fi.field)
+
+		// As an optimization, we can avoid the merge function call cost
+		// if we know for sure that the source will have no effect
+		// by checking if it is the zero value.
+		if unsafeAllowed {
+			if fi.isPointer && sfp.getPointer().isNil() { // Could be slice or string
+				continue
+			}
+			if fi.basicWidth > 0 {
+				switch {
+				case fi.basicWidth == 1 && !*sfp.toBool():
+					continue
+				case fi.basicWidth == 4 && *sfp.toUint32() == 0:
+					continue
+				case fi.basicWidth == 8 && *sfp.toUint64() == 0:
+					continue
+				}
+			}
+		}
+
+		dfp := dst.offset(fi.field)
+		fi.merge(dfp, sfp)
+	}
+
+	// TODO: Make this faster?
+	out := dst.asPointerTo(mi.typ).Elem()
+	in := src.asPointerTo(mi.typ).Elem()
+	if emIn, err := extendable(in.Addr().Interface()); err == nil {
+		emOut, _ := extendable(out.Addr().Interface())
+		mIn, muIn := emIn.extensionsRead()
+		if mIn != nil {
+			mOut := emOut.extensionsWrite()
+			muIn.Lock()
+			mergeExtension(mOut, mIn)
+			muIn.Unlock()
+		}
+	}
+
+	if mi.unrecognized.IsValid() {
+		if b := *src.offset(mi.unrecognized).toBytes(); len(b) > 0 {
+			*dst.offset(mi.unrecognized).toBytes() = append([]byte(nil), b...)
+		}
+	}
+}
+
+func (mi *mergeInfo) computeMergeInfo() {
+	mi.lock.Lock()
+	defer mi.lock.Unlock()
+	if mi.initialized != 0 {
+		return
+	}
+	t := mi.typ
+	n := t.NumField()
+
+	props := GetProperties(t)
+	for i := 0; i < n; i++ {
+		f := t.Field(i)
+		if strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+
+		mfi := mergeFieldInfo{field: toField(&f)}
+		tf := f.Type
+
+		// As an optimization, we can avoid the merge function call cost
+		// if we know for sure that the source will have no effect
+		// by checking if it is the zero value.
+		if unsafeAllowed {
+			switch tf.Kind() {
+			case reflect.Ptr, reflect.Slice, reflect.String:
+				// As a special case, we assume slices and strings are pointers
+				// since we know that the first field in the SliceSlice or
+				// StringHeader is a data pointer.
+				mfi.isPointer = true
+			case reflect.Bool:
+				mfi.basicWidth = 1
+			case reflect.Int32, reflect.Uint32, reflect.Float32:
+				mfi.basicWidth = 4
+			case reflect.Int64, reflect.Uint64, reflect.Float64:
+				mfi.basicWidth = 8
+			}
+		}
+
+		// Unwrap tf to get at its most basic type.
+		var isPointer, isSlice bool
+		if tf.Kind() == reflect.Slice && tf.Elem().Kind() != reflect.Uint8 {
+			isSlice = true
+			tf = tf.Elem()
+		}
+		if tf.Kind() == reflect.Ptr {
+			isPointer = true
+			tf = tf.Elem()
+		}
+		if isPointer && isSlice && tf.Kind() != reflect.Struct {
+			panic("both pointer and slice for basic type in " + tf.Name())
+		}
+
+		switch tf.Kind() {
+		case reflect.Int32:
+			switch {
+			case isSlice: // E.g., []int32
+				mfi.merge = func(dst, src pointer) {
+					// NOTE: toInt32Slice is not defined (see pointer_reflect.go).
+					/*
+						sfsp := src.toInt32Slice()
+						if *sfsp != nil {
+							dfsp := dst.toInt32Slice()
+							*dfsp = append(*dfsp, *sfsp...)
+							if *dfsp == nil {
+								*dfsp = []int64{}
+							}
+						}
+					*/
+					sfs := src.getInt32Slice()
+					if sfs != nil {
+						dfs := dst.getInt32Slice()
+						dfs = append(dfs, sfs...)
+						if dfs == nil {
+							dfs = []int32{}
+						}
+						dst.setInt32Slice(dfs)
+					}
+				}
+			case isPointer: // E.g., *int32
+				mfi.merge = func(dst, src pointer) {
+					// NOTE: toInt32Ptr is not defined (see pointer_reflect.go).
+					/*
+						sfpp := src.toInt32Ptr()
+						if *sfpp != nil {
+							dfpp := dst.toInt32Ptr()
+							if *dfpp == nil {
+								*dfpp = Int32(**sfpp)
+							} else {
+								**dfpp = **sfpp
+							}
+						}
+					*/
+					sfp := src.getInt32Ptr()
+					if sfp != nil {
+						dfp := dst.getInt32Ptr()
+						if dfp == nil {
+							dst.setInt32Ptr(*sfp)
+						} else {
+							*dfp = *sfp
+						}
+					}
+				}
+			default: // E.g., int32
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toInt32(); v != 0 {
+						*dst.toInt32() = v
+					}
+				}
+			}
+		case reflect.Int64:
+			switch {
+			case isSlice: // E.g., []int64
+				mfi.merge = func(dst, src pointer) {
+					sfsp := src.toInt64Slice()
+					if *sfsp != nil {
+						dfsp := dst.toInt64Slice()
+						*dfsp = append(*dfsp, *sfsp...)
+						if *dfsp == nil {
+							*dfsp = []int64{}
+						}
+					}
+				}
+			case isPointer: // E.g., *int64
+				mfi.merge = func(dst, src pointer) {
+					sfpp := src.toInt64Ptr()
+					if *sfpp != nil {
+						dfpp := dst.toInt64Ptr()
+						if *dfpp == nil {
+							*dfpp = Int64(**sfpp)
+						} else {
+							**dfpp = **sfpp
+						}
+					}
+				}
+			default: // E.g., int64
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toInt64(); v != 0 {
+						*dst.toInt64() = v
+					}
+				}
+			}
+		case reflect.Uint32:
+			switch {
+			case isSlice: // E.g., []uint32
+				mfi.merge = func(dst, src pointer) {
+					sfsp := src.toUint32Slice()
+					if *sfsp != nil {
+						dfsp := dst.toUint32Slice()
+						*dfsp = append(*dfsp, *sfsp...)
+						if *dfsp == nil {
+							*dfsp = []uint32{}
+						}
+					}
+				}
+			case isPointer: // E.g., *uint32
+				mfi.merge = func(dst, src pointer) {
+					sfpp := src.toUint32Ptr()
+					if *sfpp != nil {
+						dfpp := dst.toUint32Ptr()
+						if *dfpp == nil {
+							*dfpp = Uint32(**sfpp)
+						} else {
+							**dfpp = **sfpp
+						}
+					}
+				}
+			default: // E.g., uint32
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toUint32(); v != 0 {
+						*dst.toUint32() = v
+					}
+				}
+			}
+		case reflect.Uint64:
+			switch {
+			case isSlice: // E.g., []uint64
+				mfi.merge = func(dst, src pointer) {
+					sfsp := src.toUint64Slice()
+					if *sfsp != nil {
+						dfsp := dst.toUint64Slice()
+						*dfsp = append(*dfsp, *sfsp...)
+						if *dfsp == nil {
+							*dfsp = []uint64{}
+						}
+					}
+				}
+			case isPointer: // E.g., *uint64
+				mfi.merge = func(dst, src pointer) {
+					sfpp := src.toUint64Ptr()
+					if *sfpp != nil {
+						dfpp := dst.toUint64Ptr()
+						if *dfpp == nil {
+							*dfpp = Uint64(**sfpp)
+						} else {
+							**dfpp = **sfpp
+						}
+					}
+				}
+			default: // E.g., uint64
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toUint64(); v != 0 {
+						*dst.toUint64() = v
+					}
+				}
+			}
+		case reflect.Float32:
+			switch {
+			case isSlice: // E.g., []float32
+				mfi.merge = func(dst, src pointer) {
+					sfsp := src.toFloat32Slice()
+					if *sfsp != nil {
+						dfsp := dst.toFloat32Slice()
+						*dfsp = append(*dfsp, *sfsp...)
+						if *dfsp == nil {
+							*dfsp = []float32{}
+						}
+					}
+				}
+			case isPointer: // E.g., *float32
+				mfi.merge = func(dst, src pointer) {
+					sfpp := src.toFloat32Ptr()
+					if *sfpp != nil {
+						dfpp := dst.toFloat32Ptr()
+						if *dfpp == nil {
+							*dfpp = Float32(**sfpp)
+						} else {
+							**dfpp = **sfpp
+						}
+					}
+				}
+			default: // E.g., float32
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toFloat32(); v != 0 {
+						*dst.toFloat32() = v
+					}
+				}
+			}
+		case reflect.Float64:
+			switch {
+			case isSlice: // E.g., []float64
+				mfi.merge = func(dst, src pointer) {
+					sfsp := src.toFloat64Slice()
+					if *sfsp != nil {
+						dfsp := dst.toFloat64Slice()
+						*dfsp = append(*dfsp, *sfsp...)
+						if *dfsp == nil {
+							*dfsp = []float64{}
+						}
+					}
+				}
+			case isPointer: // E.g., *float64
+				mfi.merge = func(dst, src pointer) {
+					sfpp := src.toFloat64Ptr()
+					if *sfpp != nil {
+						dfpp := dst.toFloat64Ptr()
+						if *dfpp == nil {
+							*dfpp = Float64(**sfpp)
+						} else {
+							**dfpp = **sfpp
+						}
+					}
+				}
+			default: // E.g., float64
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toFloat64(); v != 0 {
+						*dst.toFloat64() = v
+					}
+				}
+			}
+		case reflect.Bool:
+			switch {
+			case isSlice: // E.g., []bool
+				mfi.merge = func(dst, src pointer) {
+					sfsp := src.toBoolSlice()
+					if *sfsp != nil {
+						dfsp := dst.toBoolSlice()
+						*dfsp = append(*dfsp, *sfsp...)
+						if *dfsp == nil {
+							*dfsp = []bool{}
+						}
+					}
+				}
+			case isPointer: // E.g., *bool
+				mfi.merge = func(dst, src pointer) {
+					sfpp := src.toBoolPtr()
+					if *sfpp != nil {
+						dfpp := dst.toBoolPtr()
+						if *dfpp == nil {
+							*dfpp = Bool(**sfpp)
+						} else {
+							**dfpp = **sfpp
+						}
+					}
+				}
+			default: // E.g., bool
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toBool(); v {
+						*dst.toBool() = v
+					}
+				}
+			}
+		case reflect.String:
+			switch {
+			case isSlice: // E.g., []string
+				mfi.merge = func(dst, src pointer) {
+					sfsp := src.toStringSlice()
+					if *sfsp != nil {
+						dfsp := dst.toStringSlice()
+						*dfsp = append(*dfsp, *sfsp...)
+						if *dfsp == nil {
+							*dfsp = []string{}
+						}
+					}
+				}
+			case isPointer: // E.g., *string
+				mfi.merge = func(dst, src pointer) {
+					sfpp := src.toStringPtr()
+					if *sfpp != nil {
+						dfpp := dst.toStringPtr()
+						if *dfpp == nil {
+							*dfpp = String(**sfpp)
+						} else {
+							**dfpp = **sfpp
+						}
+					}
+				}
+			default: // E.g., string
+				mfi.merge = func(dst, src pointer) {
+					if v := *src.toString(); v != "" {
+						*dst.toString() = v
+					}
+				}
+			}
+		case reflect.Slice:
+			isProto3 := props.Prop[i].proto3
+			switch {
+			case isPointer:
+				panic("bad pointer in byte slice case in " + tf.Name())
+			case tf.Elem().Kind() != reflect.Uint8:
+				panic("bad element kind in byte slice case in " + tf.Name())
+			case isSlice: // E.g., [][]byte
+				mfi.merge = func(dst, src pointer) {
+					sbsp := src.toBytesSlice()
+					if *sbsp != nil {
+						dbsp := dst.toBytesSlice()
+						for _, sb := range *sbsp {
+							if sb == nil {
+								*dbsp = append(*dbsp, nil)
+							} else {
+								*dbsp = append(*dbsp, append([]byte{}, sb...))
+							}
+						}
+						if *dbsp == nil {
+							*dbsp = [][]byte{}
+						}
+					}
+				}
+			default: // E.g., []byte
+				mfi.merge = func(dst, src pointer) {
+					sbp := src.toBytes()
+					if *sbp != nil {
+						dbp := dst.toBytes()
+						if !isProto3 || len(*sbp) > 0 {
+							*dbp = append([]byte{}, *sbp...)
+						}
+					}
+				}
+			}
+		case reflect.Struct:
+			switch {
+			case !isPointer:
+				panic(fmt.Sprintf("message field %s without pointer", tf))
+			case isSlice: // E.g., []*pb.T
+				mi := getMergeInfo(tf)
+				mfi.merge = func(dst, src pointer) {
+					sps := src.getPointerSlice()
+					if sps != nil {
+						dps := dst.getPointerSlice()
+						for _, sp := range sps {
+							var dp pointer
+							if !sp.isNil() {
+								dp = valToPointer(reflect.New(tf))
+								mi.merge(dp, sp)
+							}
+							dps = append(dps, dp)
+						}
+						if dps == nil {
+							dps = []pointer{}
+						}
+						dst.setPointerSlice(dps)
+					}
+				}
+			default: // E.g., *pb.T
+				mi := getMergeInfo(tf)
+				mfi.merge = func(dst, src pointer) {
+					sp := src.getPointer()
+					if !sp.isNil() {
+						dp := dst.getPointer()
+						if dp.isNil() {
+							dp = valToPointer(reflect.New(tf))
+							dst.setPointer(dp)
+						}
+						mi.merge(dp, sp)
+					}
+				}
+			}
+		case reflect.Map:
+			switch {
+			case isPointer || isSlice:
+				panic("bad pointer or slice in map case in " + tf.Name())
+			default: // E.g., map[K]V
+				mfi.merge = func(dst, src pointer) {
+					sm := src.asPointerTo(tf).Elem()
+					if sm.Len() == 0 {
+						return
+					}
+					dm := dst.asPointerTo(tf).Elem()
+					if dm.IsNil() {
+						dm.Set(reflect.MakeMap(tf))
+					}
+
+					switch tf.Elem().Kind() {
+					case reflect.Ptr: // Proto struct (e.g., *T)
+						for _, key := range sm.MapKeys() {
+							val := sm.MapIndex(key)
+							val = reflect.ValueOf(Clone(val.Interface().(Message)))
+							dm.SetMapIndex(key, val)
+						}
+					case reflect.Slice: // E.g. Bytes type (e.g., []byte)
+						for _, key := range sm.MapKeys() {
+							val := sm.MapIndex(key)
+							val = reflect.ValueOf(append([]byte{}, val.Bytes()...))
+							dm.SetMapIndex(key, val)
+						}
+					default: // Basic type (e.g., string)
+						for _, key := range sm.MapKeys() {
+							val := sm.MapIndex(key)
+							dm.SetMapIndex(key, val)
+						}
+					}
+				}
+			}
+		case reflect.Interface:
+			// Must be oneof field.
+			switch {
+			case isPointer || isSlice:
+				panic("bad pointer or slice in interface case in " + tf.Name())
+			default: // E.g., interface{}
+				// TODO: Make this faster?
+				mfi.merge = func(dst, src pointer) {
+					su := src.asPointerTo(tf).Elem()
+					if !su.IsNil() {
+						du := dst.asPointerTo(tf).Elem()
+						typ := su.Elem().Type()
+						if du.IsNil() || du.Elem().Type() != typ {
+							du.Set(reflect.New(typ.Elem())) // Initialize interface if empty
+						}
+						sv := su.Elem().Elem().Field(0)
+						if sv.Kind() == reflect.Ptr && sv.IsNil() {
+							return
+						}
+						dv := du.Elem().Elem().Field(0)
+						if dv.Kind() == reflect.Ptr && dv.IsNil() {
+							dv.Set(reflect.New(sv.Type().Elem())) // Initialize proto message if empty
+						}
+						switch sv.Type().Kind() {
+						case reflect.Ptr: // Proto struct (e.g., *T)
+							Merge(dv.Interface().(Message), sv.Interface().(Message))
+						case reflect.Slice: // E.g. Bytes type (e.g., []byte)
+							dv.Set(reflect.ValueOf(append([]byte{}, sv.Bytes()...)))
+						default: // Basic type (e.g., string)
+							dv.Set(sv)
+						}
+					}
+				}
+			}
+		default:
+			panic(fmt.Sprintf("merger not found for type:%s", tf))
+		}
+		mi.fields = append(mi.fields, mfi)
+	}
+
+	mi.unrecognized = invalidField
+	if f, ok := t.FieldByName("XXX_unrecognized"); ok {
+		if f.Type != reflect.TypeOf([]byte{}) {
+			panic("expected XXX_unrecognized to be of type []byte")
+		}
+		mi.unrecognized = toField(&f)
+	}
+
+	atomic.StoreInt32(&mi.initialized, 1)
+}
diff --git a/proto/table_unmarshal.go b/proto/table_unmarshal.go
new file mode 100644
index 0000000..55f0340
--- /dev/null
+++ b/proto/table_unmarshal.go
@@ -0,0 +1,1967 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2016 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"reflect"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"unicode/utf8"
+)
+
+// Unmarshal is the entry point from the generated .pb.go files.
+// This function is not intended to be used by non-generated code.
+// This function is not subject to any compatibility guarantee.
+// msg contains a pointer to a protocol buffer struct.
+// b is the data to be unmarshaled into the protocol buffer.
+// a is a pointer to a place to store cached unmarshal information.
+func (a *InternalMessageInfo) Unmarshal(msg Message, b []byte) error {
+	// Load the unmarshal information for this message type.
+	// The atomic load ensures memory consistency.
+	u := atomicLoadUnmarshalInfo(&a.unmarshal)
+	if u == nil {
+		// Slow path: find unmarshal info for msg, update a with it.
+		u = getUnmarshalInfo(reflect.TypeOf(msg).Elem())
+		atomicStoreUnmarshalInfo(&a.unmarshal, u)
+	}
+	// Then do the unmarshaling.
+	err := u.unmarshal(toPointer(&msg), b)
+	return err
+}
+
+type unmarshalInfo struct {
+	typ reflect.Type // type of the protobuf struct
+
+	// 0 = only typ field is initialized
+	// 1 = completely initialized
+	initialized     int32
+	lock            sync.Mutex                    // prevents double initialization
+	dense           []unmarshalFieldInfo          // fields indexed by tag #
+	sparse          map[uint64]unmarshalFieldInfo // fields indexed by tag #
+	reqFields       []string                      // names of required fields
+	reqMask         uint64                        // 1<<len(reqFields)-1
+	unrecognized    field                         // offset of []byte to put unrecognized data (or invalidField if we should throw it away)
+	extensions      field                         // offset of extensions field (of type proto.XXX_InternalExtensions), or invalidField if it does not exist
+	oldExtensions   field                         // offset of old-form extensions field (of type map[int]Extension)
+	extensionRanges []ExtensionRange              // if non-nil, implies extensions field is valid
+	isMessageSet    bool                          // if true, implies extensions field is valid
+}
+
+// An unmarshaler takes a stream of bytes and a pointer to a field of a message.
+// It decodes the field, stores it at f, and returns the unused bytes.
+// w is the wire encoding.
+// b is the data after the tag and wire encoding have been read.
+type unmarshaler func(b []byte, f pointer, w int) ([]byte, error)
+
+type unmarshalFieldInfo struct {
+	// location of the field in the proto message structure.
+	field field
+
+	// function to unmarshal the data for the field.
+	unmarshal unmarshaler
+
+	// if a required field, contains a single set bit at this field's index in the required field list.
+	reqMask uint64
+}
+
+var (
+	unmarshalInfoMap  = map[reflect.Type]*unmarshalInfo{}
+	unmarshalInfoLock sync.Mutex
+)
+
+// getUnmarshalInfo returns the data structure which can be
+// subsequently used to unmarshal a message of the given type.
+// t is the type of the message (note: not pointer to message).
+func getUnmarshalInfo(t reflect.Type) *unmarshalInfo {
+	// It would be correct to return a new unmarshalInfo
+	// unconditionally. We would end up allocating one
+	// per occurrence of that type as a message or submessage.
+	// We use a cache here just to reduce memory usage.
+	unmarshalInfoLock.Lock()
+	defer unmarshalInfoLock.Unlock()
+	u := unmarshalInfoMap[t]
+	if u == nil {
+		u = &unmarshalInfo{typ: t}
+		// Note: we just set the type here. The rest of the fields
+		// will be initialized on first use.
+		unmarshalInfoMap[t] = u
+	}
+	return u
+}
+
+// unmarshal does the main work of unmarshaling a message.
+// u provides type information used to unmarshal the message.
+// m is a pointer to a protocol buffer message.
+// b is a byte stream to unmarshal into m.
+// This is top routine used when recursively unmarshaling submessages.
+func (u *unmarshalInfo) unmarshal(m pointer, b []byte) error {
+	if atomic.LoadInt32(&u.initialized) == 0 {
+		u.computeUnmarshalInfo()
+	}
+	if u.isMessageSet {
+		return UnmarshalMessageSet(b, m.offset(u.extensions).toExtensions())
+	}
+	var reqMask uint64            // bitmask of required fields we've seen.
+	var rnse *RequiredNotSetError // an instance of a RequiredNotSetError returned by a submessage.
+	for len(b) > 0 {
+		// Read tag and wire type.
+		// Special case 1 and 2 byte varints.
+		var x uint64
+		if b[0] < 128 {
+			x = uint64(b[0])
+			b = b[1:]
+		} else if len(b) >= 2 && b[1] < 128 {
+			x = uint64(b[0]&0x7f) + uint64(b[1])<<7
+			b = b[2:]
+		} else {
+			var n int
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return io.ErrUnexpectedEOF
+			}
+			b = b[n:]
+		}
+		tag := x >> 3
+		wire := int(x) & 7
+
+		// Dispatch on the tag to one of the unmarshal* functions below.
+		var f unmarshalFieldInfo
+		if tag < uint64(len(u.dense)) {
+			f = u.dense[tag]
+		} else {
+			f = u.sparse[tag]
+		}
+		if fn := f.unmarshal; fn != nil {
+			var err error
+			b, err = fn(b, m.offset(f.field), wire)
+			if err == nil {
+				reqMask |= f.reqMask
+				continue
+			}
+			if r, ok := err.(*RequiredNotSetError); ok {
+				// Remember this error, but keep parsing. We need to produce
+				// a full parse even if a required field is missing.
+				rnse = r
+				reqMask |= f.reqMask
+				continue
+			}
+			if err != errInternalBadWireType {
+				return err
+			}
+			// Fragments with bad wire type are treated as unknown fields.
+		}
+
+		// Unknown tag.
+		if !u.unrecognized.IsValid() {
+			// Don't keep unrecognized data; just skip it.
+			var err error
+			b, err = skipField(b, wire)
+			if err != nil {
+				return err
+			}
+			continue
+		}
+		// Keep unrecognized data around.
+		// maybe in extensions, maybe in the unrecognized field.
+		z := m.offset(u.unrecognized).toBytes()
+		var emap map[int32]Extension
+		var e Extension
+		for _, r := range u.extensionRanges {
+			if uint64(r.Start) <= tag && tag <= uint64(r.End) {
+				if u.extensions.IsValid() {
+					mp := m.offset(u.extensions).toExtensions()
+					emap = mp.extensionsWrite()
+					e = emap[int32(tag)]
+					z = &e.enc
+					break
+				}
+				if u.oldExtensions.IsValid() {
+					p := m.offset(u.oldExtensions).toOldExtensions()
+					emap = *p
+					if emap == nil {
+						emap = map[int32]Extension{}
+						*p = emap
+					}
+					e = emap[int32(tag)]
+					z = &e.enc
+					break
+				}
+				panic("no extensions field available")
+			}
+		}
+
+		// Use wire type to skip data.
+		var err error
+		b0 := b
+		b, err = skipField(b, wire)
+		if err != nil {
+			return err
+		}
+		*z = encodeVarint(*z, tag<<3|uint64(wire))
+		*z = append(*z, b0[:len(b0)-len(b)]...)
+
+		if emap != nil {
+			emap[int32(tag)] = e
+		}
+	}
+	if rnse != nil {
+		// A required field of a submessage/group is missing. Return that error.
+		return rnse
+	}
+	if reqMask != u.reqMask {
+		// A required field of this message is missing.
+		for _, n := range u.reqFields {
+			if reqMask&1 == 0 {
+				return &RequiredNotSetError{n}
+			}
+			reqMask >>= 1
+		}
+	}
+	return nil
+}
+
+// computeUnmarshalInfo fills in u with information for use
+// in unmarshaling protocol buffers of type u.typ.
+func (u *unmarshalInfo) computeUnmarshalInfo() {
+	u.lock.Lock()
+	defer u.lock.Unlock()
+	if u.initialized != 0 {
+		return
+	}
+	t := u.typ
+	n := t.NumField()
+
+	// Set up the "not found" value for the unrecognized byte buffer.
+	// This is the default for proto3.
+	u.unrecognized = invalidField
+	u.extensions = invalidField
+	u.oldExtensions = invalidField
+
+	// List of the generated type and offset for each oneof field.
+	type oneofField struct {
+		ityp  reflect.Type // interface type of oneof field
+		field field        // offset in containing message
+	}
+	var oneofFields []oneofField
+
+	for i := 0; i < n; i++ {
+		f := t.Field(i)
+		if f.Name == "XXX_unrecognized" {
+			// The byte slice used to hold unrecognized input is special.
+			if f.Type != reflect.TypeOf(([]byte)(nil)) {
+				panic("bad type for XXX_unrecognized field: " + f.Type.Name())
+			}
+			u.unrecognized = toField(&f)
+			continue
+		}
+		if f.Name == "XXX_InternalExtensions" {
+			// Ditto here.
+			if f.Type != reflect.TypeOf(XXX_InternalExtensions{}) {
+				panic("bad type for XXX_InternalExtensions field: " + f.Type.Name())
+			}
+			u.extensions = toField(&f)
+			if f.Tag.Get("protobuf_messageset") == "1" {
+				u.isMessageSet = true
+			}
+			continue
+		}
+		if f.Name == "XXX_extensions" {
+			// An older form of the extensions field.
+			if f.Type != reflect.TypeOf((map[int32]Extension)(nil)) {
+				panic("bad type for XXX_extensions field: " + f.Type.Name())
+			}
+			u.oldExtensions = toField(&f)
+			continue
+		}
+		if f.Name == "XXX_NoUnkeyedLiteral" || f.Name == "XXX_sizecache" {
+			continue
+		}
+
+		oneof := f.Tag.Get("protobuf_oneof")
+		if oneof != "" {
+			oneofFields = append(oneofFields, oneofField{f.Type, toField(&f)})
+			// The rest of oneof processing happens below.
+			continue
+		}
+
+		tags := f.Tag.Get("protobuf")
+		tagArray := strings.Split(tags, ",")
+		if len(tagArray) < 2 {
+			panic("protobuf tag not enough fields in " + t.Name() + "." + f.Name + ": " + tags)
+		}
+		tag, err := strconv.Atoi(tagArray[1])
+		if err != nil {
+			panic("protobuf tag field not an integer: " + tagArray[1])
+		}
+
+		name := ""
+		for _, tag := range tagArray[3:] {
+			if strings.HasPrefix(tag, "name=") {
+				name = tag[5:]
+			}
+		}
+
+		// Extract unmarshaling function from the field (its type and tags).
+		unmarshal := fieldUnmarshaler(&f)
+
+		// Required field?
+		var reqMask uint64
+		if tagArray[2] == "req" {
+			bit := len(u.reqFields)
+			u.reqFields = append(u.reqFields, name)
+			reqMask = uint64(1) << uint(bit)
+			// TODO: if we have more than 64 required fields, we end up
+			// not verifying that all required fields are present.
+			// Fix this, perhaps using a count of required fields?
+		}
+
+		// Store the info in the correct slot in the message.
+		u.setTag(tag, toField(&f), unmarshal, reqMask)
+	}
+
+	// Find any types associated with oneof fields.
+	// TODO: XXX_OneofFuncs returns more info than we need.  Get rid of some of it?
+	fn := reflect.Zero(reflect.PtrTo(t)).MethodByName("XXX_OneofFuncs")
+	if fn.IsValid() {
+		res := fn.Call(nil)[3] // last return value from XXX_OneofFuncs: []interface{}
+		for i := res.Len() - 1; i >= 0; i-- {
+			v := res.Index(i)                             // interface{}
+			tptr := reflect.ValueOf(v.Interface()).Type() // *Msg_X
+			typ := tptr.Elem()                            // Msg_X
+
+			f := typ.Field(0) // oneof implementers have one field
+			baseUnmarshal := fieldUnmarshaler(&f)
+			tagstr := strings.Split(f.Tag.Get("protobuf"), ",")[1]
+			tag, err := strconv.Atoi(tagstr)
+			if err != nil {
+				panic("protobuf tag field not an integer: " + tagstr)
+			}
+
+			// Find the oneof field that this struct implements.
+			// Might take O(n^2) to process all of the oneofs, but who cares.
+			for _, of := range oneofFields {
+				if tptr.Implements(of.ityp) {
+					// We have found the corresponding interface for this struct.
+					// That lets us know where this struct should be stored
+					// when we encounter it during unmarshaling.
+					unmarshal := makeUnmarshalOneof(typ, of.ityp, baseUnmarshal)
+					u.setTag(tag, of.field, unmarshal, 0)
+				}
+			}
+		}
+	}
+
+	// Get extension ranges, if any.
+	fn = reflect.Zero(reflect.PtrTo(t)).MethodByName("ExtensionRangeArray")
+	if fn.IsValid() {
+		if !u.extensions.IsValid() && !u.oldExtensions.IsValid() {
+			panic("a message with extensions, but no extensions field in " + t.Name())
+		}
+		u.extensionRanges = fn.Call(nil)[0].Interface().([]ExtensionRange)
+	}
+
+	// Explicitly disallow tag 0. This will ensure we flag an error
+	// when decoding a buffer of all zeros. Without this code, we
+	// would decode and skip an all-zero buffer of even length.
+	// [0 0] is [tag=0/wiretype=varint varint-encoded-0].
+	u.setTag(0, zeroField, func(b []byte, f pointer, w int) ([]byte, error) {
+		return nil, fmt.Errorf("proto: %s: illegal tag 0 (wire type %d)", t, w)
+	}, 0)
+
+	// Set mask for required field check.
+	u.reqMask = uint64(1)<<uint(len(u.reqFields)) - 1
+
+	atomic.StoreInt32(&u.initialized, 1)
+}
+
+// setTag stores the unmarshal information for the given tag.
+// tag = tag # for field
+// field/unmarshal = unmarshal info for that field.
+// reqMask = if required, bitmask for field position in required field list. 0 otherwise.
+func (u *unmarshalInfo) setTag(tag int, field field, unmarshal unmarshaler, reqMask uint64) {
+	i := unmarshalFieldInfo{field: field, unmarshal: unmarshal, reqMask: reqMask}
+	n := u.typ.NumField()
+	if tag >= 0 && (tag < 16 || tag < 2*n) { // TODO: what are the right numbers here?
+		for len(u.dense) <= tag {
+			u.dense = append(u.dense, unmarshalFieldInfo{})
+		}
+		u.dense[tag] = i
+		return
+	}
+	if u.sparse == nil {
+		u.sparse = map[uint64]unmarshalFieldInfo{}
+	}
+	u.sparse[uint64(tag)] = i
+}
+
+// fieldUnmarshaler returns an unmarshaler for the given field.
+func fieldUnmarshaler(f *reflect.StructField) unmarshaler {
+	if f.Type.Kind() == reflect.Map {
+		return makeUnmarshalMap(f)
+	}
+	return typeUnmarshaler(f.Type, f.Tag.Get("protobuf"))
+}
+
+// typeUnmarshaler returns an unmarshaler for the given field type / field tag pair.
+func typeUnmarshaler(t reflect.Type, tags string) unmarshaler {
+	tagArray := strings.Split(tags, ",")
+	encoding := tagArray[0]
+	name := "unknown"
+	for _, tag := range tagArray[3:] {
+		if strings.HasPrefix(tag, "name=") {
+			name = tag[5:]
+		}
+	}
+
+	// Figure out packaging (pointer, slice, or both)
+	slice := false
+	pointer := false
+	if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 {
+		slice = true
+		t = t.Elem()
+	}
+	if t.Kind() == reflect.Ptr {
+		pointer = true
+		t = t.Elem()
+	}
+
+	// We'll never have both pointer and slice for basic types.
+	if pointer && slice && t.Kind() != reflect.Struct {
+		panic("both pointer and slice for basic type in " + t.Name())
+	}
+
+	switch t.Kind() {
+	case reflect.Bool:
+		if pointer {
+			return unmarshalBoolPtr
+		}
+		if slice {
+			return unmarshalBoolSlice
+		}
+		return unmarshalBoolValue
+	case reflect.Int32:
+		switch encoding {
+		case "fixed32":
+			if pointer {
+				return unmarshalFixedS32Ptr
+			}
+			if slice {
+				return unmarshalFixedS32Slice
+			}
+			return unmarshalFixedS32Value
+		case "varint":
+			// this could be int32 or enum
+			if pointer {
+				return unmarshalInt32Ptr
+			}
+			if slice {
+				return unmarshalInt32Slice
+			}
+			return unmarshalInt32Value
+		case "zigzag32":
+			if pointer {
+				return unmarshalSint32Ptr
+			}
+			if slice {
+				return unmarshalSint32Slice
+			}
+			return unmarshalSint32Value
+		}
+	case reflect.Int64:
+		switch encoding {
+		case "fixed64":
+			if pointer {
+				return unmarshalFixedS64Ptr
+			}
+			if slice {
+				return unmarshalFixedS64Slice
+			}
+			return unmarshalFixedS64Value
+		case "varint":
+			if pointer {
+				return unmarshalInt64Ptr
+			}
+			if slice {
+				return unmarshalInt64Slice
+			}
+			return unmarshalInt64Value
+		case "zigzag64":
+			if pointer {
+				return unmarshalSint64Ptr
+			}
+			if slice {
+				return unmarshalSint64Slice
+			}
+			return unmarshalSint64Value
+		}
+	case reflect.Uint32:
+		switch encoding {
+		case "fixed32":
+			if pointer {
+				return unmarshalFixed32Ptr
+			}
+			if slice {
+				return unmarshalFixed32Slice
+			}
+			return unmarshalFixed32Value
+		case "varint":
+			if pointer {
+				return unmarshalUint32Ptr
+			}
+			if slice {
+				return unmarshalUint32Slice
+			}
+			return unmarshalUint32Value
+		}
+	case reflect.Uint64:
+		switch encoding {
+		case "fixed64":
+			if pointer {
+				return unmarshalFixed64Ptr
+			}
+			if slice {
+				return unmarshalFixed64Slice
+			}
+			return unmarshalFixed64Value
+		case "varint":
+			if pointer {
+				return unmarshalUint64Ptr
+			}
+			if slice {
+				return unmarshalUint64Slice
+			}
+			return unmarshalUint64Value
+		}
+	case reflect.Float32:
+		if pointer {
+			return unmarshalFloat32Ptr
+		}
+		if slice {
+			return unmarshalFloat32Slice
+		}
+		return unmarshalFloat32Value
+	case reflect.Float64:
+		if pointer {
+			return unmarshalFloat64Ptr
+		}
+		if slice {
+			return unmarshalFloat64Slice
+		}
+		return unmarshalFloat64Value
+	case reflect.Map:
+		panic("map type in typeUnmarshaler in " + t.Name())
+	case reflect.Slice:
+		if pointer {
+			panic("bad pointer in slice case in " + t.Name())
+		}
+		if slice {
+			return unmarshalBytesSlice
+		}
+		return unmarshalBytesValue
+	case reflect.String:
+		if pointer {
+			return unmarshalStringPtr
+		}
+		if slice {
+			return unmarshalStringSlice
+		}
+		return unmarshalStringValue
+	case reflect.Struct:
+		// message or group field
+		if !pointer {
+			panic(fmt.Sprintf("message/group field %s:%s without pointer", t, encoding))
+		}
+		switch encoding {
+		case "bytes":
+			if slice {
+				return makeUnmarshalMessageSlicePtr(getUnmarshalInfo(t), name)
+			}
+			return makeUnmarshalMessagePtr(getUnmarshalInfo(t), name)
+		case "group":
+			if slice {
+				return makeUnmarshalGroupSlicePtr(getUnmarshalInfo(t), name)
+			}
+			return makeUnmarshalGroupPtr(getUnmarshalInfo(t), name)
+		}
+	}
+	panic(fmt.Sprintf("unmarshaler not found type:%s encoding:%s", t, encoding))
+}
+
+// Below are all the unmarshalers for individual fields of various types.
+
+func unmarshalInt64Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int64(x)
+	*f.toInt64() = v
+	return b, nil
+}
+
+func unmarshalInt64Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int64(x)
+	*f.toInt64Ptr() = &v
+	return b, nil
+}
+
+func unmarshalInt64Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			b = b[n:]
+			v := int64(x)
+			s := f.toInt64Slice()
+			*s = append(*s, v)
+		}
+		return res, nil
+	}
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int64(x)
+	s := f.toInt64Slice()
+	*s = append(*s, v)
+	return b, nil
+}
+
+func unmarshalSint64Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int64(x>>1) ^ int64(x)<<63>>63
+	*f.toInt64() = v
+	return b, nil
+}
+
+func unmarshalSint64Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int64(x>>1) ^ int64(x)<<63>>63
+	*f.toInt64Ptr() = &v
+	return b, nil
+}
+
+func unmarshalSint64Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			b = b[n:]
+			v := int64(x>>1) ^ int64(x)<<63>>63
+			s := f.toInt64Slice()
+			*s = append(*s, v)
+		}
+		return res, nil
+	}
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int64(x>>1) ^ int64(x)<<63>>63
+	s := f.toInt64Slice()
+	*s = append(*s, v)
+	return b, nil
+}
+
+func unmarshalUint64Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := uint64(x)
+	*f.toUint64() = v
+	return b, nil
+}
+
+func unmarshalUint64Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := uint64(x)
+	*f.toUint64Ptr() = &v
+	return b, nil
+}
+
+func unmarshalUint64Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			b = b[n:]
+			v := uint64(x)
+			s := f.toUint64Slice()
+			*s = append(*s, v)
+		}
+		return res, nil
+	}
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := uint64(x)
+	s := f.toUint64Slice()
+	*s = append(*s, v)
+	return b, nil
+}
+
+func unmarshalInt32Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int32(x)
+	*f.toInt32() = v
+	return b, nil
+}
+
+func unmarshalInt32Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int32(x)
+	f.setInt32Ptr(v)
+	return b, nil
+}
+
+func unmarshalInt32Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			b = b[n:]
+			v := int32(x)
+			f.appendInt32Slice(v)
+		}
+		return res, nil
+	}
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int32(x)
+	f.appendInt32Slice(v)
+	return b, nil
+}
+
+func unmarshalSint32Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int32(x>>1) ^ int32(x)<<31>>31
+	*f.toInt32() = v
+	return b, nil
+}
+
+func unmarshalSint32Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int32(x>>1) ^ int32(x)<<31>>31
+	f.setInt32Ptr(v)
+	return b, nil
+}
+
+func unmarshalSint32Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			b = b[n:]
+			v := int32(x>>1) ^ int32(x)<<31>>31
+			f.appendInt32Slice(v)
+		}
+		return res, nil
+	}
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := int32(x>>1) ^ int32(x)<<31>>31
+	f.appendInt32Slice(v)
+	return b, nil
+}
+
+func unmarshalUint32Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := uint32(x)
+	*f.toUint32() = v
+	return b, nil
+}
+
+func unmarshalUint32Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := uint32(x)
+	*f.toUint32Ptr() = &v
+	return b, nil
+}
+
+func unmarshalUint32Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			b = b[n:]
+			v := uint32(x)
+			s := f.toUint32Slice()
+			*s = append(*s, v)
+		}
+		return res, nil
+	}
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	v := uint32(x)
+	s := f.toUint32Slice()
+	*s = append(*s, v)
+	return b, nil
+}
+
+func unmarshalFixed64Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
+	*f.toUint64() = v
+	return b[8:], nil
+}
+
+func unmarshalFixed64Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
+	*f.toUint64Ptr() = &v
+	return b[8:], nil
+}
+
+func unmarshalFixed64Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			if len(b) < 8 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
+			s := f.toUint64Slice()
+			*s = append(*s, v)
+			b = b[8:]
+		}
+		return res, nil
+	}
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
+	s := f.toUint64Slice()
+	*s = append(*s, v)
+	return b[8:], nil
+}
+
+func unmarshalFixedS64Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56
+	*f.toInt64() = v
+	return b[8:], nil
+}
+
+func unmarshalFixedS64Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56
+	*f.toInt64Ptr() = &v
+	return b[8:], nil
+}
+
+func unmarshalFixedS64Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			if len(b) < 8 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56
+			s := f.toInt64Slice()
+			*s = append(*s, v)
+			b = b[8:]
+		}
+		return res, nil
+	}
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56
+	s := f.toInt64Slice()
+	*s = append(*s, v)
+	return b[8:], nil
+}
+
+func unmarshalFixed32Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+	*f.toUint32() = v
+	return b[4:], nil
+}
+
+func unmarshalFixed32Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+	*f.toUint32Ptr() = &v
+	return b[4:], nil
+}
+
+func unmarshalFixed32Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			if len(b) < 4 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+			s := f.toUint32Slice()
+			*s = append(*s, v)
+			b = b[4:]
+		}
+		return res, nil
+	}
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+	s := f.toUint32Slice()
+	*s = append(*s, v)
+	return b[4:], nil
+}
+
+func unmarshalFixedS32Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24
+	*f.toInt32() = v
+	return b[4:], nil
+}
+
+func unmarshalFixedS32Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24
+	f.setInt32Ptr(v)
+	return b[4:], nil
+}
+
+func unmarshalFixedS32Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			if len(b) < 4 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24
+			f.appendInt32Slice(v)
+			b = b[4:]
+		}
+		return res, nil
+	}
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24
+	f.appendInt32Slice(v)
+	return b[4:], nil
+}
+
+func unmarshalBoolValue(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	// Note: any length varint is allowed, even though any sane
+	// encoder will use one byte.
+	// See https://github.com/golang/protobuf/issues/76
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	// TODO: check if x>1? Tests seem to indicate no.
+	v := x != 0
+	*f.toBool() = v
+	return b[n:], nil
+}
+
+func unmarshalBoolPtr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := x != 0
+	*f.toBoolPtr() = &v
+	return b[n:], nil
+}
+
+func unmarshalBoolSlice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			x, n = decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			v := x != 0
+			s := f.toBoolSlice()
+			*s = append(*s, v)
+			b = b[n:]
+		}
+		return res, nil
+	}
+	if w != WireVarint {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := x != 0
+	s := f.toBoolSlice()
+	*s = append(*s, v)
+	return b[n:], nil
+}
+
+func unmarshalFloat64Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56)
+	*f.toFloat64() = v
+	return b[8:], nil
+}
+
+func unmarshalFloat64Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56)
+	*f.toFloat64Ptr() = &v
+	return b[8:], nil
+}
+
+func unmarshalFloat64Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			if len(b) < 8 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56)
+			s := f.toFloat64Slice()
+			*s = append(*s, v)
+			b = b[8:]
+		}
+		return res, nil
+	}
+	if w != WireFixed64 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 8 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56)
+	s := f.toFloat64Slice()
+	*s = append(*s, v)
+	return b[8:], nil
+}
+
+func unmarshalFloat32Value(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24)
+	*f.toFloat32() = v
+	return b[4:], nil
+}
+
+func unmarshalFloat32Ptr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24)
+	*f.toFloat32Ptr() = &v
+	return b[4:], nil
+}
+
+func unmarshalFloat32Slice(b []byte, f pointer, w int) ([]byte, error) {
+	if w == WireBytes { // packed
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		res := b[x:]
+		b = b[:x]
+		for len(b) > 0 {
+			if len(b) < 4 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24)
+			s := f.toFloat32Slice()
+			*s = append(*s, v)
+			b = b[4:]
+		}
+		return res, nil
+	}
+	if w != WireFixed32 {
+		return b, errInternalBadWireType
+	}
+	if len(b) < 4 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24)
+	s := f.toFloat32Slice()
+	*s = append(*s, v)
+	return b[4:], nil
+}
+
+func unmarshalStringValue(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireBytes {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	if x > uint64(len(b)) {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := string(b[:x])
+	if !utf8.ValidString(v) {
+		return nil, errInvalidUTF8
+	}
+	*f.toString() = v
+	return b[x:], nil
+}
+
+func unmarshalStringPtr(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireBytes {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	if x > uint64(len(b)) {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := string(b[:x])
+	if !utf8.ValidString(v) {
+		return nil, errInvalidUTF8
+	}
+	*f.toStringPtr() = &v
+	return b[x:], nil
+}
+
+func unmarshalStringSlice(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireBytes {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	if x > uint64(len(b)) {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := string(b[:x])
+	if !utf8.ValidString(v) {
+		return nil, errInvalidUTF8
+	}
+	s := f.toStringSlice()
+	*s = append(*s, v)
+	return b[x:], nil
+}
+
+var emptyBuf [0]byte
+
+func unmarshalBytesValue(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireBytes {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	if x > uint64(len(b)) {
+		return nil, io.ErrUnexpectedEOF
+	}
+	// The use of append here is a trick which avoids the zeroing
+	// that would be required if we used a make/copy pair.
+	// We append to emptyBuf instead of nil because we want
+	// a non-nil result even when the length is 0.
+	v := append(emptyBuf[:], b[:x]...)
+	*f.toBytes() = v
+	return b[x:], nil
+}
+
+func unmarshalBytesSlice(b []byte, f pointer, w int) ([]byte, error) {
+	if w != WireBytes {
+		return b, errInternalBadWireType
+	}
+	x, n := decodeVarint(b)
+	if n == 0 {
+		return nil, io.ErrUnexpectedEOF
+	}
+	b = b[n:]
+	if x > uint64(len(b)) {
+		return nil, io.ErrUnexpectedEOF
+	}
+	v := append(emptyBuf[:], b[:x]...)
+	s := f.toBytesSlice()
+	*s = append(*s, v)
+	return b[x:], nil
+}
+
+func makeUnmarshalMessagePtr(sub *unmarshalInfo, name string) unmarshaler {
+	return func(b []byte, f pointer, w int) ([]byte, error) {
+		if w != WireBytes {
+			return b, errInternalBadWireType
+		}
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		// First read the message field to see if something is there.
+		// The semantics of multiple submessages are weird.  Instead of
+		// the last one winning (as it is for all other fields), multiple
+		// submessages are merged.
+		v := f.getPointer()
+		if v.isNil() {
+			v = valToPointer(reflect.New(sub.typ))
+			f.setPointer(v)
+		}
+		err := sub.unmarshal(v, b[:x])
+		if err != nil {
+			if r, ok := err.(*RequiredNotSetError); ok {
+				r.field = name + "." + r.field
+			} else {
+				return nil, err
+			}
+		}
+		return b[x:], err
+	}
+}
+
+func makeUnmarshalMessageSlicePtr(sub *unmarshalInfo, name string) unmarshaler {
+	return func(b []byte, f pointer, w int) ([]byte, error) {
+		if w != WireBytes {
+			return b, errInternalBadWireType
+		}
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		v := valToPointer(reflect.New(sub.typ))
+		err := sub.unmarshal(v, b[:x])
+		if err != nil {
+			if r, ok := err.(*RequiredNotSetError); ok {
+				r.field = name + "." + r.field
+			} else {
+				return nil, err
+			}
+		}
+		f.appendPointer(v)
+		return b[x:], err
+	}
+}
+
+func makeUnmarshalGroupPtr(sub *unmarshalInfo, name string) unmarshaler {
+	return func(b []byte, f pointer, w int) ([]byte, error) {
+		if w != WireStartGroup {
+			return b, errInternalBadWireType
+		}
+		x, y := findEndGroup(b)
+		if x < 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		v := f.getPointer()
+		if v.isNil() {
+			v = valToPointer(reflect.New(sub.typ))
+			f.setPointer(v)
+		}
+		err := sub.unmarshal(v, b[:x])
+		if err != nil {
+			if r, ok := err.(*RequiredNotSetError); ok {
+				r.field = name + "." + r.field
+			} else {
+				return nil, err
+			}
+		}
+		return b[y:], err
+	}
+}
+
+func makeUnmarshalGroupSlicePtr(sub *unmarshalInfo, name string) unmarshaler {
+	return func(b []byte, f pointer, w int) ([]byte, error) {
+		if w != WireStartGroup {
+			return b, errInternalBadWireType
+		}
+		x, y := findEndGroup(b)
+		if x < 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		v := valToPointer(reflect.New(sub.typ))
+		err := sub.unmarshal(v, b[:x])
+		if err != nil {
+			if r, ok := err.(*RequiredNotSetError); ok {
+				r.field = name + "." + r.field
+			} else {
+				return nil, err
+			}
+		}
+		f.appendPointer(v)
+		return b[y:], err
+	}
+}
+
+func makeUnmarshalMap(f *reflect.StructField) unmarshaler {
+	t := f.Type
+	kt := t.Key()
+	vt := t.Elem()
+	unmarshalKey := typeUnmarshaler(kt, f.Tag.Get("protobuf_key"))
+	unmarshalVal := typeUnmarshaler(vt, f.Tag.Get("protobuf_val"))
+	return func(b []byte, f pointer, w int) ([]byte, error) {
+		// The map entry is a submessage. Figure out how big it is.
+		if w != WireBytes {
+			return nil, fmt.Errorf("proto: bad wiretype for map field: got %d want %d", w, WireBytes)
+		}
+		x, n := decodeVarint(b)
+		if n == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		b = b[n:]
+		if x > uint64(len(b)) {
+			return nil, io.ErrUnexpectedEOF
+		}
+		r := b[x:] // unused data to return
+		b = b[:x]  // data for map entry
+
+		// Note: we could use #keys * #values ~= 200 functions
+		// to do map decoding without reflection. Probably not worth it.
+		// Maps will be somewhat slow. Oh well.
+
+		// Read key and value from data.
+		k := reflect.New(kt)
+		v := reflect.New(vt)
+		for len(b) > 0 {
+			x, n := decodeVarint(b)
+			if n == 0 {
+				return nil, io.ErrUnexpectedEOF
+			}
+			wire := int(x) & 7
+			b = b[n:]
+
+			var err error
+			switch x >> 3 {
+			case 1:
+				b, err = unmarshalKey(b, valToPointer(k), wire)
+			case 2:
+				b, err = unmarshalVal(b, valToPointer(v), wire)
+			default:
+				err = errInternalBadWireType // skip unknown tag
+			}
+
+			if err == nil {
+				continue
+			}
+			if err != errInternalBadWireType {
+				return nil, err
+			}
+
+			// Skip past unknown fields.
+			b, err = skipField(b, wire)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		// Get map, allocate if needed.
+		m := f.asPointerTo(t).Elem() // an addressable map[K]T
+		if m.IsNil() {
+			m.Set(reflect.MakeMap(t))
+		}
+
+		// Insert into map.
+		m.SetMapIndex(k.Elem(), v.Elem())
+
+		return r, nil
+	}
+}
+
+// makeUnmarshalOneof makes an unmarshaler for oneof fields.
+// for:
+// message Msg {
+//   oneof F {
+//     int64 X = 1;
+//     float64 Y = 2;
+//   }
+// }
+// typ is the type of the concrete entry for a oneof case (e.g. Msg_X).
+// ityp is the interface type of the oneof field (e.g. isMsg_F).
+// unmarshal is the unmarshaler for the base type of the oneof case (e.g. int64).
+// Note that this function will be called once for each case in the oneof.
+func makeUnmarshalOneof(typ, ityp reflect.Type, unmarshal unmarshaler) unmarshaler {
+	sf := typ.Field(0)
+	field0 := toField(&sf)
+	return func(b []byte, f pointer, w int) ([]byte, error) {
+		// Allocate holder for value.
+		v := reflect.New(typ)
+
+		// Unmarshal data into holder.
+		// We unmarshal into the first field of the holder object.
+		var err error
+		b, err = unmarshal(b, valToPointer(v).offset(field0), w)
+		if err != nil {
+			return nil, err
+		}
+
+		// Write pointer to holder into target field.
+		f.asPointerTo(ityp).Elem().Set(v)
+
+		return b, nil
+	}
+}
+
+// Error used by decode internally.
+var errInternalBadWireType = errors.New("proto: internal error: bad wiretype")
+
+// skipField skips past a field of type wire and returns the remaining bytes.
+func skipField(b []byte, wire int) ([]byte, error) {
+	switch wire {
+	case WireVarint:
+		_, k := decodeVarint(b)
+		if k == 0 {
+			return b, io.ErrUnexpectedEOF
+		}
+		b = b[k:]
+	case WireFixed32:
+		if len(b) < 4 {
+			return b, io.ErrUnexpectedEOF
+		}
+		b = b[4:]
+	case WireFixed64:
+		if len(b) < 8 {
+			return b, io.ErrUnexpectedEOF
+		}
+		b = b[8:]
+	case WireBytes:
+		m, k := decodeVarint(b)
+		if k == 0 || uint64(len(b)-k) < m {
+			return b, io.ErrUnexpectedEOF
+		}
+		b = b[uint64(k)+m:]
+	case WireStartGroup:
+		_, i := findEndGroup(b)
+		if i == -1 {
+			return b, io.ErrUnexpectedEOF
+		}
+		b = b[i:]
+	default:
+		return b, fmt.Errorf("proto: can't skip unknown wire type %d", wire)
+	}
+	return b, nil
+}
+
+// findEndGroup finds the index of the next EndGroup tag.
+// Groups may be nested, so the "next" EndGroup tag is the first
+// unpaired EndGroup.
+// findEndGroup returns the indexes of the start and end of the EndGroup tag.
+// Returns (-1,-1) if it can't find one.
+func findEndGroup(b []byte) (int, int) {
+	depth := 1
+	i := 0
+	for {
+		x, n := decodeVarint(b[i:])
+		if n == 0 {
+			return -1, -1
+		}
+		j := i
+		i += n
+		switch x & 7 {
+		case WireVarint:
+			_, k := decodeVarint(b[i:])
+			if k == 0 {
+				return -1, -1
+			}
+			i += k
+		case WireFixed32:
+			if len(b)-4 < i {
+				return -1, -1
+			}
+			i += 4
+		case WireFixed64:
+			if len(b)-8 < i {
+				return -1, -1
+			}
+			i += 8
+		case WireBytes:
+			m, k := decodeVarint(b[i:])
+			if k == 0 {
+				return -1, -1
+			}
+			i += k
+			if uint64(len(b)-i) < m {
+				return -1, -1
+			}
+			i += int(m)
+		case WireStartGroup:
+			depth++
+		case WireEndGroup:
+			depth--
+			if depth == 0 {
+				return j, i
+			}
+		default:
+			return -1, -1
+		}
+	}
+}
+
+// encodeVarint appends a varint-encoded integer to b and returns the result.
+func encodeVarint(b []byte, x uint64) []byte {
+	for x >= 1<<7 {
+		b = append(b, byte(x&0x7f|0x80))
+		x >>= 7
+	}
+	return append(b, byte(x))
+}
+
+// decodeVarint reads a varint-encoded integer from b.
+// Returns the decoded integer and the number of bytes read.
+// If there is an error, it returns 0,0.
+func decodeVarint(b []byte) (uint64, int) {
+	var x, y uint64
+	if len(b) <= 0 {
+		goto bad
+	}
+	x = uint64(b[0])
+	if x < 0x80 {
+		return x, 1
+	}
+	x -= 0x80
+
+	if len(b) <= 1 {
+		goto bad
+	}
+	y = uint64(b[1])
+	x += y << 7
+	if y < 0x80 {
+		return x, 2
+	}
+	x -= 0x80 << 7
+
+	if len(b) <= 2 {
+		goto bad
+	}
+	y = uint64(b[2])
+	x += y << 14
+	if y < 0x80 {
+		return x, 3
+	}
+	x -= 0x80 << 14
+
+	if len(b) <= 3 {
+		goto bad
+	}
+	y = uint64(b[3])
+	x += y << 21
+	if y < 0x80 {
+		return x, 4
+	}
+	x -= 0x80 << 21
+
+	if len(b) <= 4 {
+		goto bad
+	}
+	y = uint64(b[4])
+	x += y << 28
+	if y < 0x80 {
+		return x, 5
+	}
+	x -= 0x80 << 28
+
+	if len(b) <= 5 {
+		goto bad
+	}
+	y = uint64(b[5])
+	x += y << 35
+	if y < 0x80 {
+		return x, 6
+	}
+	x -= 0x80 << 35
+
+	if len(b) <= 6 {
+		goto bad
+	}
+	y = uint64(b[6])
+	x += y << 42
+	if y < 0x80 {
+		return x, 7
+	}
+	x -= 0x80 << 42
+
+	if len(b) <= 7 {
+		goto bad
+	}
+	y = uint64(b[7])
+	x += y << 49
+	if y < 0x80 {
+		return x, 8
+	}
+	x -= 0x80 << 49
+
+	if len(b) <= 8 {
+		goto bad
+	}
+	y = uint64(b[8])
+	x += y << 56
+	if y < 0x80 {
+		return x, 9
+	}
+	x -= 0x80 << 56
+
+	if len(b) <= 9 {
+		goto bad
+	}
+	y = uint64(b[9])
+	x += y << 63
+	if y < 2 {
+		return x, 10
+	}
+
+bad:
+	return 0, 0
+}
diff --git a/proto/test_proto/test.pb.go b/proto/test_proto/test.pb.go
new file mode 100644
index 0000000..049b5dd
--- /dev/null
+++ b/proto/test_proto/test.pb.go
@@ -0,0 +1,5118 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: test_proto/test.proto
+
+package test_proto // import "github.com/golang/protobuf/proto/test_proto"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type FOO int32
+
+const (
+	FOO_FOO1 FOO = 1
+)
+
+var FOO_name = map[int32]string{
+	1: "FOO1",
+}
+var FOO_value = map[string]int32{
+	"FOO1": 1,
+}
+
+func (x FOO) Enum() *FOO {
+	p := new(FOO)
+	*p = x
+	return p
+}
+func (x FOO) String() string {
+	return proto.EnumName(FOO_name, int32(x))
+}
+func (x *FOO) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(FOO_value, data, "FOO")
+	if err != nil {
+		return err
+	}
+	*x = FOO(value)
+	return nil
+}
+func (FOO) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{0}
+}
+
+// An enum, for completeness.
+type GoTest_KIND int32
+
+const (
+	GoTest_VOID GoTest_KIND = 0
+	// Basic types
+	GoTest_BOOL        GoTest_KIND = 1
+	GoTest_BYTES       GoTest_KIND = 2
+	GoTest_FINGERPRINT GoTest_KIND = 3
+	GoTest_FLOAT       GoTest_KIND = 4
+	GoTest_INT         GoTest_KIND = 5
+	GoTest_STRING      GoTest_KIND = 6
+	GoTest_TIME        GoTest_KIND = 7
+	// Groupings
+	GoTest_TUPLE GoTest_KIND = 8
+	GoTest_ARRAY GoTest_KIND = 9
+	GoTest_MAP   GoTest_KIND = 10
+	// Table types
+	GoTest_TABLE GoTest_KIND = 11
+	// Functions
+	GoTest_FUNCTION GoTest_KIND = 12
+)
+
+var GoTest_KIND_name = map[int32]string{
+	0:  "VOID",
+	1:  "BOOL",
+	2:  "BYTES",
+	3:  "FINGERPRINT",
+	4:  "FLOAT",
+	5:  "INT",
+	6:  "STRING",
+	7:  "TIME",
+	8:  "TUPLE",
+	9:  "ARRAY",
+	10: "MAP",
+	11: "TABLE",
+	12: "FUNCTION",
+}
+var GoTest_KIND_value = map[string]int32{
+	"VOID":        0,
+	"BOOL":        1,
+	"BYTES":       2,
+	"FINGERPRINT": 3,
+	"FLOAT":       4,
+	"INT":         5,
+	"STRING":      6,
+	"TIME":        7,
+	"TUPLE":       8,
+	"ARRAY":       9,
+	"MAP":         10,
+	"TABLE":       11,
+	"FUNCTION":    12,
+}
+
+func (x GoTest_KIND) Enum() *GoTest_KIND {
+	p := new(GoTest_KIND)
+	*p = x
+	return p
+}
+func (x GoTest_KIND) String() string {
+	return proto.EnumName(GoTest_KIND_name, int32(x))
+}
+func (x *GoTest_KIND) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(GoTest_KIND_value, data, "GoTest_KIND")
+	if err != nil {
+		return err
+	}
+	*x = GoTest_KIND(value)
+	return nil
+}
+func (GoTest_KIND) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{2, 0}
+}
+
+type MyMessage_Color int32
+
+const (
+	MyMessage_RED   MyMessage_Color = 0
+	MyMessage_GREEN MyMessage_Color = 1
+	MyMessage_BLUE  MyMessage_Color = 2
+)
+
+var MyMessage_Color_name = map[int32]string{
+	0: "RED",
+	1: "GREEN",
+	2: "BLUE",
+}
+var MyMessage_Color_value = map[string]int32{
+	"RED":   0,
+	"GREEN": 1,
+	"BLUE":  2,
+}
+
+func (x MyMessage_Color) Enum() *MyMessage_Color {
+	p := new(MyMessage_Color)
+	*p = x
+	return p
+}
+func (x MyMessage_Color) String() string {
+	return proto.EnumName(MyMessage_Color_name, int32(x))
+}
+func (x *MyMessage_Color) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MyMessage_Color_value, data, "MyMessage_Color")
+	if err != nil {
+		return err
+	}
+	*x = MyMessage_Color(value)
+	return nil
+}
+func (MyMessage_Color) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{13, 0}
+}
+
+type DefaultsMessage_DefaultsEnum int32
+
+const (
+	DefaultsMessage_ZERO DefaultsMessage_DefaultsEnum = 0
+	DefaultsMessage_ONE  DefaultsMessage_DefaultsEnum = 1
+	DefaultsMessage_TWO  DefaultsMessage_DefaultsEnum = 2
+)
+
+var DefaultsMessage_DefaultsEnum_name = map[int32]string{
+	0: "ZERO",
+	1: "ONE",
+	2: "TWO",
+}
+var DefaultsMessage_DefaultsEnum_value = map[string]int32{
+	"ZERO": 0,
+	"ONE":  1,
+	"TWO":  2,
+}
+
+func (x DefaultsMessage_DefaultsEnum) Enum() *DefaultsMessage_DefaultsEnum {
+	p := new(DefaultsMessage_DefaultsEnum)
+	*p = x
+	return p
+}
+func (x DefaultsMessage_DefaultsEnum) String() string {
+	return proto.EnumName(DefaultsMessage_DefaultsEnum_name, int32(x))
+}
+func (x *DefaultsMessage_DefaultsEnum) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(DefaultsMessage_DefaultsEnum_value, data, "DefaultsMessage_DefaultsEnum")
+	if err != nil {
+		return err
+	}
+	*x = DefaultsMessage_DefaultsEnum(value)
+	return nil
+}
+func (DefaultsMessage_DefaultsEnum) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{16, 0}
+}
+
+type Defaults_Color int32
+
+const (
+	Defaults_RED   Defaults_Color = 0
+	Defaults_GREEN Defaults_Color = 1
+	Defaults_BLUE  Defaults_Color = 2
+)
+
+var Defaults_Color_name = map[int32]string{
+	0: "RED",
+	1: "GREEN",
+	2: "BLUE",
+}
+var Defaults_Color_value = map[string]int32{
+	"RED":   0,
+	"GREEN": 1,
+	"BLUE":  2,
+}
+
+func (x Defaults_Color) Enum() *Defaults_Color {
+	p := new(Defaults_Color)
+	*p = x
+	return p
+}
+func (x Defaults_Color) String() string {
+	return proto.EnumName(Defaults_Color_name, int32(x))
+}
+func (x *Defaults_Color) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(Defaults_Color_value, data, "Defaults_Color")
+	if err != nil {
+		return err
+	}
+	*x = Defaults_Color(value)
+	return nil
+}
+func (Defaults_Color) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{21, 0}
+}
+
+type RepeatedEnum_Color int32
+
+const (
+	RepeatedEnum_RED RepeatedEnum_Color = 1
+)
+
+var RepeatedEnum_Color_name = map[int32]string{
+	1: "RED",
+}
+var RepeatedEnum_Color_value = map[string]int32{
+	"RED": 1,
+}
+
+func (x RepeatedEnum_Color) Enum() *RepeatedEnum_Color {
+	p := new(RepeatedEnum_Color)
+	*p = x
+	return p
+}
+func (x RepeatedEnum_Color) String() string {
+	return proto.EnumName(RepeatedEnum_Color_name, int32(x))
+}
+func (x *RepeatedEnum_Color) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(RepeatedEnum_Color_value, data, "RepeatedEnum_Color")
+	if err != nil {
+		return err
+	}
+	*x = RepeatedEnum_Color(value)
+	return nil
+}
+func (RepeatedEnum_Color) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{23, 0}
+}
+
+type GoEnum struct {
+	Foo                  *FOO     `protobuf:"varint,1,req,name=foo,enum=test_proto.FOO" json:"foo,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GoEnum) Reset()         { *m = GoEnum{} }
+func (m *GoEnum) String() string { return proto.CompactTextString(m) }
+func (*GoEnum) ProtoMessage()    {}
+func (*GoEnum) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{0}
+}
+func (m *GoEnum) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoEnum.Unmarshal(m, b)
+}
+func (m *GoEnum) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoEnum.Marshal(b, m, deterministic)
+}
+func (dst *GoEnum) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoEnum.Merge(dst, src)
+}
+func (m *GoEnum) XXX_Size() int {
+	return xxx_messageInfo_GoEnum.Size(m)
+}
+func (m *GoEnum) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoEnum.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoEnum proto.InternalMessageInfo
+
+func (m *GoEnum) GetFoo() FOO {
+	if m != nil && m.Foo != nil {
+		return *m.Foo
+	}
+	return FOO_FOO1
+}
+
+type GoTestField struct {
+	Label                *string  `protobuf:"bytes,1,req,name=Label" json:"Label,omitempty"`
+	Type                 *string  `protobuf:"bytes,2,req,name=Type" json:"Type,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GoTestField) Reset()         { *m = GoTestField{} }
+func (m *GoTestField) String() string { return proto.CompactTextString(m) }
+func (*GoTestField) ProtoMessage()    {}
+func (*GoTestField) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{1}
+}
+func (m *GoTestField) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoTestField.Unmarshal(m, b)
+}
+func (m *GoTestField) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoTestField.Marshal(b, m, deterministic)
+}
+func (dst *GoTestField) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoTestField.Merge(dst, src)
+}
+func (m *GoTestField) XXX_Size() int {
+	return xxx_messageInfo_GoTestField.Size(m)
+}
+func (m *GoTestField) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoTestField.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoTestField proto.InternalMessageInfo
+
+func (m *GoTestField) GetLabel() string {
+	if m != nil && m.Label != nil {
+		return *m.Label
+	}
+	return ""
+}
+
+func (m *GoTestField) GetType() string {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return ""
+}
+
+type GoTest struct {
+	// Some typical parameters
+	Kind  *GoTest_KIND `protobuf:"varint,1,req,name=Kind,enum=test_proto.GoTest_KIND" json:"Kind,omitempty"`
+	Table *string      `protobuf:"bytes,2,opt,name=Table" json:"Table,omitempty"`
+	Param *int32       `protobuf:"varint,3,opt,name=Param" json:"Param,omitempty"`
+	// Required, repeated and optional foreign fields.
+	RequiredField *GoTestField   `protobuf:"bytes,4,req,name=RequiredField" json:"RequiredField,omitempty"`
+	RepeatedField []*GoTestField `protobuf:"bytes,5,rep,name=RepeatedField" json:"RepeatedField,omitempty"`
+	OptionalField *GoTestField   `protobuf:"bytes,6,opt,name=OptionalField" json:"OptionalField,omitempty"`
+	// Required fields of all basic types
+	F_BoolRequired     *bool    `protobuf:"varint,10,req,name=F_Bool_required,json=FBoolRequired" json:"F_Bool_required,omitempty"`
+	F_Int32Required    *int32   `protobuf:"varint,11,req,name=F_Int32_required,json=FInt32Required" json:"F_Int32_required,omitempty"`
+	F_Int64Required    *int64   `protobuf:"varint,12,req,name=F_Int64_required,json=FInt64Required" json:"F_Int64_required,omitempty"`
+	F_Fixed32Required  *uint32  `protobuf:"fixed32,13,req,name=F_Fixed32_required,json=FFixed32Required" json:"F_Fixed32_required,omitempty"`
+	F_Fixed64Required  *uint64  `protobuf:"fixed64,14,req,name=F_Fixed64_required,json=FFixed64Required" json:"F_Fixed64_required,omitempty"`
+	F_Uint32Required   *uint32  `protobuf:"varint,15,req,name=F_Uint32_required,json=FUint32Required" json:"F_Uint32_required,omitempty"`
+	F_Uint64Required   *uint64  `protobuf:"varint,16,req,name=F_Uint64_required,json=FUint64Required" json:"F_Uint64_required,omitempty"`
+	F_FloatRequired    *float32 `protobuf:"fixed32,17,req,name=F_Float_required,json=FFloatRequired" json:"F_Float_required,omitempty"`
+	F_DoubleRequired   *float64 `protobuf:"fixed64,18,req,name=F_Double_required,json=FDoubleRequired" json:"F_Double_required,omitempty"`
+	F_StringRequired   *string  `protobuf:"bytes,19,req,name=F_String_required,json=FStringRequired" json:"F_String_required,omitempty"`
+	F_BytesRequired    []byte   `protobuf:"bytes,101,req,name=F_Bytes_required,json=FBytesRequired" json:"F_Bytes_required,omitempty"`
+	F_Sint32Required   *int32   `protobuf:"zigzag32,102,req,name=F_Sint32_required,json=FSint32Required" json:"F_Sint32_required,omitempty"`
+	F_Sint64Required   *int64   `protobuf:"zigzag64,103,req,name=F_Sint64_required,json=FSint64Required" json:"F_Sint64_required,omitempty"`
+	F_Sfixed32Required *int32   `protobuf:"fixed32,104,req,name=F_Sfixed32_required,json=FSfixed32Required" json:"F_Sfixed32_required,omitempty"`
+	F_Sfixed64Required *int64   `protobuf:"fixed64,105,req,name=F_Sfixed64_required,json=FSfixed64Required" json:"F_Sfixed64_required,omitempty"`
+	// Repeated fields of all basic types
+	F_BoolRepeated     []bool    `protobuf:"varint,20,rep,name=F_Bool_repeated,json=FBoolRepeated" json:"F_Bool_repeated,omitempty"`
+	F_Int32Repeated    []int32   `protobuf:"varint,21,rep,name=F_Int32_repeated,json=FInt32Repeated" json:"F_Int32_repeated,omitempty"`
+	F_Int64Repeated    []int64   `protobuf:"varint,22,rep,name=F_Int64_repeated,json=FInt64Repeated" json:"F_Int64_repeated,omitempty"`
+	F_Fixed32Repeated  []uint32  `protobuf:"fixed32,23,rep,name=F_Fixed32_repeated,json=FFixed32Repeated" json:"F_Fixed32_repeated,omitempty"`
+	F_Fixed64Repeated  []uint64  `protobuf:"fixed64,24,rep,name=F_Fixed64_repeated,json=FFixed64Repeated" json:"F_Fixed64_repeated,omitempty"`
+	F_Uint32Repeated   []uint32  `protobuf:"varint,25,rep,name=F_Uint32_repeated,json=FUint32Repeated" json:"F_Uint32_repeated,omitempty"`
+	F_Uint64Repeated   []uint64  `protobuf:"varint,26,rep,name=F_Uint64_repeated,json=FUint64Repeated" json:"F_Uint64_repeated,omitempty"`
+	F_FloatRepeated    []float32 `protobuf:"fixed32,27,rep,name=F_Float_repeated,json=FFloatRepeated" json:"F_Float_repeated,omitempty"`
+	F_DoubleRepeated   []float64 `protobuf:"fixed64,28,rep,name=F_Double_repeated,json=FDoubleRepeated" json:"F_Double_repeated,omitempty"`
+	F_StringRepeated   []string  `protobuf:"bytes,29,rep,name=F_String_repeated,json=FStringRepeated" json:"F_String_repeated,omitempty"`
+	F_BytesRepeated    [][]byte  `protobuf:"bytes,201,rep,name=F_Bytes_repeated,json=FBytesRepeated" json:"F_Bytes_repeated,omitempty"`
+	F_Sint32Repeated   []int32   `protobuf:"zigzag32,202,rep,name=F_Sint32_repeated,json=FSint32Repeated" json:"F_Sint32_repeated,omitempty"`
+	F_Sint64Repeated   []int64   `protobuf:"zigzag64,203,rep,name=F_Sint64_repeated,json=FSint64Repeated" json:"F_Sint64_repeated,omitempty"`
+	F_Sfixed32Repeated []int32   `protobuf:"fixed32,204,rep,name=F_Sfixed32_repeated,json=FSfixed32Repeated" json:"F_Sfixed32_repeated,omitempty"`
+	F_Sfixed64Repeated []int64   `protobuf:"fixed64,205,rep,name=F_Sfixed64_repeated,json=FSfixed64Repeated" json:"F_Sfixed64_repeated,omitempty"`
+	// Optional fields of all basic types
+	F_BoolOptional     *bool    `protobuf:"varint,30,opt,name=F_Bool_optional,json=FBoolOptional" json:"F_Bool_optional,omitempty"`
+	F_Int32Optional    *int32   `protobuf:"varint,31,opt,name=F_Int32_optional,json=FInt32Optional" json:"F_Int32_optional,omitempty"`
+	F_Int64Optional    *int64   `protobuf:"varint,32,opt,name=F_Int64_optional,json=FInt64Optional" json:"F_Int64_optional,omitempty"`
+	F_Fixed32Optional  *uint32  `protobuf:"fixed32,33,opt,name=F_Fixed32_optional,json=FFixed32Optional" json:"F_Fixed32_optional,omitempty"`
+	F_Fixed64Optional  *uint64  `protobuf:"fixed64,34,opt,name=F_Fixed64_optional,json=FFixed64Optional" json:"F_Fixed64_optional,omitempty"`
+	F_Uint32Optional   *uint32  `protobuf:"varint,35,opt,name=F_Uint32_optional,json=FUint32Optional" json:"F_Uint32_optional,omitempty"`
+	F_Uint64Optional   *uint64  `protobuf:"varint,36,opt,name=F_Uint64_optional,json=FUint64Optional" json:"F_Uint64_optional,omitempty"`
+	F_FloatOptional    *float32 `protobuf:"fixed32,37,opt,name=F_Float_optional,json=FFloatOptional" json:"F_Float_optional,omitempty"`
+	F_DoubleOptional   *float64 `protobuf:"fixed64,38,opt,name=F_Double_optional,json=FDoubleOptional" json:"F_Double_optional,omitempty"`
+	F_StringOptional   *string  `protobuf:"bytes,39,opt,name=F_String_optional,json=FStringOptional" json:"F_String_optional,omitempty"`
+	F_BytesOptional    []byte   `protobuf:"bytes,301,opt,name=F_Bytes_optional,json=FBytesOptional" json:"F_Bytes_optional,omitempty"`
+	F_Sint32Optional   *int32   `protobuf:"zigzag32,302,opt,name=F_Sint32_optional,json=FSint32Optional" json:"F_Sint32_optional,omitempty"`
+	F_Sint64Optional   *int64   `protobuf:"zigzag64,303,opt,name=F_Sint64_optional,json=FSint64Optional" json:"F_Sint64_optional,omitempty"`
+	F_Sfixed32Optional *int32   `protobuf:"fixed32,304,opt,name=F_Sfixed32_optional,json=FSfixed32Optional" json:"F_Sfixed32_optional,omitempty"`
+	F_Sfixed64Optional *int64   `protobuf:"fixed64,305,opt,name=F_Sfixed64_optional,json=FSfixed64Optional" json:"F_Sfixed64_optional,omitempty"`
+	// Default-valued fields of all basic types
+	F_BoolDefaulted     *bool    `protobuf:"varint,40,opt,name=F_Bool_defaulted,json=FBoolDefaulted,def=1" json:"F_Bool_defaulted,omitempty"`
+	F_Int32Defaulted    *int32   `protobuf:"varint,41,opt,name=F_Int32_defaulted,json=FInt32Defaulted,def=32" json:"F_Int32_defaulted,omitempty"`
+	F_Int64Defaulted    *int64   `protobuf:"varint,42,opt,name=F_Int64_defaulted,json=FInt64Defaulted,def=64" json:"F_Int64_defaulted,omitempty"`
+	F_Fixed32Defaulted  *uint32  `protobuf:"fixed32,43,opt,name=F_Fixed32_defaulted,json=FFixed32Defaulted,def=320" json:"F_Fixed32_defaulted,omitempty"`
+	F_Fixed64Defaulted  *uint64  `protobuf:"fixed64,44,opt,name=F_Fixed64_defaulted,json=FFixed64Defaulted,def=640" json:"F_Fixed64_defaulted,omitempty"`
+	F_Uint32Defaulted   *uint32  `protobuf:"varint,45,opt,name=F_Uint32_defaulted,json=FUint32Defaulted,def=3200" json:"F_Uint32_defaulted,omitempty"`
+	F_Uint64Defaulted   *uint64  `protobuf:"varint,46,opt,name=F_Uint64_defaulted,json=FUint64Defaulted,def=6400" json:"F_Uint64_defaulted,omitempty"`
+	F_FloatDefaulted    *float32 `protobuf:"fixed32,47,opt,name=F_Float_defaulted,json=FFloatDefaulted,def=314159" json:"F_Float_defaulted,omitempty"`
+	F_DoubleDefaulted   *float64 `protobuf:"fixed64,48,opt,name=F_Double_defaulted,json=FDoubleDefaulted,def=271828" json:"F_Double_defaulted,omitempty"`
+	F_StringDefaulted   *string  `protobuf:"bytes,49,opt,name=F_String_defaulted,json=FStringDefaulted,def=hello, \"world!\"\n" json:"F_String_defaulted,omitempty"`
+	F_BytesDefaulted    []byte   `protobuf:"bytes,401,opt,name=F_Bytes_defaulted,json=FBytesDefaulted,def=Bignose" json:"F_Bytes_defaulted,omitempty"`
+	F_Sint32Defaulted   *int32   `protobuf:"zigzag32,402,opt,name=F_Sint32_defaulted,json=FSint32Defaulted,def=-32" json:"F_Sint32_defaulted,omitempty"`
+	F_Sint64Defaulted   *int64   `protobuf:"zigzag64,403,opt,name=F_Sint64_defaulted,json=FSint64Defaulted,def=-64" json:"F_Sint64_defaulted,omitempty"`
+	F_Sfixed32Defaulted *int32   `protobuf:"fixed32,404,opt,name=F_Sfixed32_defaulted,json=FSfixed32Defaulted,def=-32" json:"F_Sfixed32_defaulted,omitempty"`
+	F_Sfixed64Defaulted *int64   `protobuf:"fixed64,405,opt,name=F_Sfixed64_defaulted,json=FSfixed64Defaulted,def=-64" json:"F_Sfixed64_defaulted,omitempty"`
+	// Packed repeated fields (no string or bytes).
+	F_BoolRepeatedPacked     []bool                  `protobuf:"varint,50,rep,packed,name=F_Bool_repeated_packed,json=FBoolRepeatedPacked" json:"F_Bool_repeated_packed,omitempty"`
+	F_Int32RepeatedPacked    []int32                 `protobuf:"varint,51,rep,packed,name=F_Int32_repeated_packed,json=FInt32RepeatedPacked" json:"F_Int32_repeated_packed,omitempty"`
+	F_Int64RepeatedPacked    []int64                 `protobuf:"varint,52,rep,packed,name=F_Int64_repeated_packed,json=FInt64RepeatedPacked" json:"F_Int64_repeated_packed,omitempty"`
+	F_Fixed32RepeatedPacked  []uint32                `protobuf:"fixed32,53,rep,packed,name=F_Fixed32_repeated_packed,json=FFixed32RepeatedPacked" json:"F_Fixed32_repeated_packed,omitempty"`
+	F_Fixed64RepeatedPacked  []uint64                `protobuf:"fixed64,54,rep,packed,name=F_Fixed64_repeated_packed,json=FFixed64RepeatedPacked" json:"F_Fixed64_repeated_packed,omitempty"`
+	F_Uint32RepeatedPacked   []uint32                `protobuf:"varint,55,rep,packed,name=F_Uint32_repeated_packed,json=FUint32RepeatedPacked" json:"F_Uint32_repeated_packed,omitempty"`
+	F_Uint64RepeatedPacked   []uint64                `protobuf:"varint,56,rep,packed,name=F_Uint64_repeated_packed,json=FUint64RepeatedPacked" json:"F_Uint64_repeated_packed,omitempty"`
+	F_FloatRepeatedPacked    []float32               `protobuf:"fixed32,57,rep,packed,name=F_Float_repeated_packed,json=FFloatRepeatedPacked" json:"F_Float_repeated_packed,omitempty"`
+	F_DoubleRepeatedPacked   []float64               `protobuf:"fixed64,58,rep,packed,name=F_Double_repeated_packed,json=FDoubleRepeatedPacked" json:"F_Double_repeated_packed,omitempty"`
+	F_Sint32RepeatedPacked   []int32                 `protobuf:"zigzag32,502,rep,packed,name=F_Sint32_repeated_packed,json=FSint32RepeatedPacked" json:"F_Sint32_repeated_packed,omitempty"`
+	F_Sint64RepeatedPacked   []int64                 `protobuf:"zigzag64,503,rep,packed,name=F_Sint64_repeated_packed,json=FSint64RepeatedPacked" json:"F_Sint64_repeated_packed,omitempty"`
+	F_Sfixed32RepeatedPacked []int32                 `protobuf:"fixed32,504,rep,packed,name=F_Sfixed32_repeated_packed,json=FSfixed32RepeatedPacked" json:"F_Sfixed32_repeated_packed,omitempty"`
+	F_Sfixed64RepeatedPacked []int64                 `protobuf:"fixed64,505,rep,packed,name=F_Sfixed64_repeated_packed,json=FSfixed64RepeatedPacked" json:"F_Sfixed64_repeated_packed,omitempty"`
+	Requiredgroup            *GoTest_RequiredGroup   `protobuf:"group,70,req,name=RequiredGroup,json=requiredgroup" json:"requiredgroup,omitempty"`
+	Repeatedgroup            []*GoTest_RepeatedGroup `protobuf:"group,80,rep,name=RepeatedGroup,json=repeatedgroup" json:"repeatedgroup,omitempty"`
+	Optionalgroup            *GoTest_OptionalGroup   `protobuf:"group,90,opt,name=OptionalGroup,json=optionalgroup" json:"optionalgroup,omitempty"`
+	XXX_NoUnkeyedLiteral     struct{}                `json:"-"`
+	XXX_unrecognized         []byte                  `json:"-"`
+	XXX_sizecache            int32                   `json:"-"`
+}
+
+func (m *GoTest) Reset()         { *m = GoTest{} }
+func (m *GoTest) String() string { return proto.CompactTextString(m) }
+func (*GoTest) ProtoMessage()    {}
+func (*GoTest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{2}
+}
+func (m *GoTest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoTest.Unmarshal(m, b)
+}
+func (m *GoTest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoTest.Marshal(b, m, deterministic)
+}
+func (dst *GoTest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoTest.Merge(dst, src)
+}
+func (m *GoTest) XXX_Size() int {
+	return xxx_messageInfo_GoTest.Size(m)
+}
+func (m *GoTest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoTest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoTest proto.InternalMessageInfo
+
+const Default_GoTest_F_BoolDefaulted bool = true
+const Default_GoTest_F_Int32Defaulted int32 = 32
+const Default_GoTest_F_Int64Defaulted int64 = 64
+const Default_GoTest_F_Fixed32Defaulted uint32 = 320
+const Default_GoTest_F_Fixed64Defaulted uint64 = 640
+const Default_GoTest_F_Uint32Defaulted uint32 = 3200
+const Default_GoTest_F_Uint64Defaulted uint64 = 6400
+const Default_GoTest_F_FloatDefaulted float32 = 314159
+const Default_GoTest_F_DoubleDefaulted float64 = 271828
+const Default_GoTest_F_StringDefaulted string = "hello, \"world!\"\n"
+
+var Default_GoTest_F_BytesDefaulted []byte = []byte("Bignose")
+
+const Default_GoTest_F_Sint32Defaulted int32 = -32
+const Default_GoTest_F_Sint64Defaulted int64 = -64
+const Default_GoTest_F_Sfixed32Defaulted int32 = -32
+const Default_GoTest_F_Sfixed64Defaulted int64 = -64
+
+func (m *GoTest) GetKind() GoTest_KIND {
+	if m != nil && m.Kind != nil {
+		return *m.Kind
+	}
+	return GoTest_VOID
+}
+
+func (m *GoTest) GetTable() string {
+	if m != nil && m.Table != nil {
+		return *m.Table
+	}
+	return ""
+}
+
+func (m *GoTest) GetParam() int32 {
+	if m != nil && m.Param != nil {
+		return *m.Param
+	}
+	return 0
+}
+
+func (m *GoTest) GetRequiredField() *GoTestField {
+	if m != nil {
+		return m.RequiredField
+	}
+	return nil
+}
+
+func (m *GoTest) GetRepeatedField() []*GoTestField {
+	if m != nil {
+		return m.RepeatedField
+	}
+	return nil
+}
+
+func (m *GoTest) GetOptionalField() *GoTestField {
+	if m != nil {
+		return m.OptionalField
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_BoolRequired() bool {
+	if m != nil && m.F_BoolRequired != nil {
+		return *m.F_BoolRequired
+	}
+	return false
+}
+
+func (m *GoTest) GetF_Int32Required() int32 {
+	if m != nil && m.F_Int32Required != nil {
+		return *m.F_Int32Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Int64Required() int64 {
+	if m != nil && m.F_Int64Required != nil {
+		return *m.F_Int64Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Fixed32Required() uint32 {
+	if m != nil && m.F_Fixed32Required != nil {
+		return *m.F_Fixed32Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Fixed64Required() uint64 {
+	if m != nil && m.F_Fixed64Required != nil {
+		return *m.F_Fixed64Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Uint32Required() uint32 {
+	if m != nil && m.F_Uint32Required != nil {
+		return *m.F_Uint32Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Uint64Required() uint64 {
+	if m != nil && m.F_Uint64Required != nil {
+		return *m.F_Uint64Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_FloatRequired() float32 {
+	if m != nil && m.F_FloatRequired != nil {
+		return *m.F_FloatRequired
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_DoubleRequired() float64 {
+	if m != nil && m.F_DoubleRequired != nil {
+		return *m.F_DoubleRequired
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_StringRequired() string {
+	if m != nil && m.F_StringRequired != nil {
+		return *m.F_StringRequired
+	}
+	return ""
+}
+
+func (m *GoTest) GetF_BytesRequired() []byte {
+	if m != nil {
+		return m.F_BytesRequired
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sint32Required() int32 {
+	if m != nil && m.F_Sint32Required != nil {
+		return *m.F_Sint32Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Sint64Required() int64 {
+	if m != nil && m.F_Sint64Required != nil {
+		return *m.F_Sint64Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Sfixed32Required() int32 {
+	if m != nil && m.F_Sfixed32Required != nil {
+		return *m.F_Sfixed32Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Sfixed64Required() int64 {
+	if m != nil && m.F_Sfixed64Required != nil {
+		return *m.F_Sfixed64Required
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_BoolRepeated() []bool {
+	if m != nil {
+		return m.F_BoolRepeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Int32Repeated() []int32 {
+	if m != nil {
+		return m.F_Int32Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Int64Repeated() []int64 {
+	if m != nil {
+		return m.F_Int64Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Fixed32Repeated() []uint32 {
+	if m != nil {
+		return m.F_Fixed32Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Fixed64Repeated() []uint64 {
+	if m != nil {
+		return m.F_Fixed64Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Uint32Repeated() []uint32 {
+	if m != nil {
+		return m.F_Uint32Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Uint64Repeated() []uint64 {
+	if m != nil {
+		return m.F_Uint64Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_FloatRepeated() []float32 {
+	if m != nil {
+		return m.F_FloatRepeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_DoubleRepeated() []float64 {
+	if m != nil {
+		return m.F_DoubleRepeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_StringRepeated() []string {
+	if m != nil {
+		return m.F_StringRepeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_BytesRepeated() [][]byte {
+	if m != nil {
+		return m.F_BytesRepeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sint32Repeated() []int32 {
+	if m != nil {
+		return m.F_Sint32Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sint64Repeated() []int64 {
+	if m != nil {
+		return m.F_Sint64Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sfixed32Repeated() []int32 {
+	if m != nil {
+		return m.F_Sfixed32Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sfixed64Repeated() []int64 {
+	if m != nil {
+		return m.F_Sfixed64Repeated
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_BoolOptional() bool {
+	if m != nil && m.F_BoolOptional != nil {
+		return *m.F_BoolOptional
+	}
+	return false
+}
+
+func (m *GoTest) GetF_Int32Optional() int32 {
+	if m != nil && m.F_Int32Optional != nil {
+		return *m.F_Int32Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Int64Optional() int64 {
+	if m != nil && m.F_Int64Optional != nil {
+		return *m.F_Int64Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Fixed32Optional() uint32 {
+	if m != nil && m.F_Fixed32Optional != nil {
+		return *m.F_Fixed32Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Fixed64Optional() uint64 {
+	if m != nil && m.F_Fixed64Optional != nil {
+		return *m.F_Fixed64Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Uint32Optional() uint32 {
+	if m != nil && m.F_Uint32Optional != nil {
+		return *m.F_Uint32Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Uint64Optional() uint64 {
+	if m != nil && m.F_Uint64Optional != nil {
+		return *m.F_Uint64Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_FloatOptional() float32 {
+	if m != nil && m.F_FloatOptional != nil {
+		return *m.F_FloatOptional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_DoubleOptional() float64 {
+	if m != nil && m.F_DoubleOptional != nil {
+		return *m.F_DoubleOptional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_StringOptional() string {
+	if m != nil && m.F_StringOptional != nil {
+		return *m.F_StringOptional
+	}
+	return ""
+}
+
+func (m *GoTest) GetF_BytesOptional() []byte {
+	if m != nil {
+		return m.F_BytesOptional
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sint32Optional() int32 {
+	if m != nil && m.F_Sint32Optional != nil {
+		return *m.F_Sint32Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Sint64Optional() int64 {
+	if m != nil && m.F_Sint64Optional != nil {
+		return *m.F_Sint64Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Sfixed32Optional() int32 {
+	if m != nil && m.F_Sfixed32Optional != nil {
+		return *m.F_Sfixed32Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_Sfixed64Optional() int64 {
+	if m != nil && m.F_Sfixed64Optional != nil {
+		return *m.F_Sfixed64Optional
+	}
+	return 0
+}
+
+func (m *GoTest) GetF_BoolDefaulted() bool {
+	if m != nil && m.F_BoolDefaulted != nil {
+		return *m.F_BoolDefaulted
+	}
+	return Default_GoTest_F_BoolDefaulted
+}
+
+func (m *GoTest) GetF_Int32Defaulted() int32 {
+	if m != nil && m.F_Int32Defaulted != nil {
+		return *m.F_Int32Defaulted
+	}
+	return Default_GoTest_F_Int32Defaulted
+}
+
+func (m *GoTest) GetF_Int64Defaulted() int64 {
+	if m != nil && m.F_Int64Defaulted != nil {
+		return *m.F_Int64Defaulted
+	}
+	return Default_GoTest_F_Int64Defaulted
+}
+
+func (m *GoTest) GetF_Fixed32Defaulted() uint32 {
+	if m != nil && m.F_Fixed32Defaulted != nil {
+		return *m.F_Fixed32Defaulted
+	}
+	return Default_GoTest_F_Fixed32Defaulted
+}
+
+func (m *GoTest) GetF_Fixed64Defaulted() uint64 {
+	if m != nil && m.F_Fixed64Defaulted != nil {
+		return *m.F_Fixed64Defaulted
+	}
+	return Default_GoTest_F_Fixed64Defaulted
+}
+
+func (m *GoTest) GetF_Uint32Defaulted() uint32 {
+	if m != nil && m.F_Uint32Defaulted != nil {
+		return *m.F_Uint32Defaulted
+	}
+	return Default_GoTest_F_Uint32Defaulted
+}
+
+func (m *GoTest) GetF_Uint64Defaulted() uint64 {
+	if m != nil && m.F_Uint64Defaulted != nil {
+		return *m.F_Uint64Defaulted
+	}
+	return Default_GoTest_F_Uint64Defaulted
+}
+
+func (m *GoTest) GetF_FloatDefaulted() float32 {
+	if m != nil && m.F_FloatDefaulted != nil {
+		return *m.F_FloatDefaulted
+	}
+	return Default_GoTest_F_FloatDefaulted
+}
+
+func (m *GoTest) GetF_DoubleDefaulted() float64 {
+	if m != nil && m.F_DoubleDefaulted != nil {
+		return *m.F_DoubleDefaulted
+	}
+	return Default_GoTest_F_DoubleDefaulted
+}
+
+func (m *GoTest) GetF_StringDefaulted() string {
+	if m != nil && m.F_StringDefaulted != nil {
+		return *m.F_StringDefaulted
+	}
+	return Default_GoTest_F_StringDefaulted
+}
+
+func (m *GoTest) GetF_BytesDefaulted() []byte {
+	if m != nil && m.F_BytesDefaulted != nil {
+		return m.F_BytesDefaulted
+	}
+	return append([]byte(nil), Default_GoTest_F_BytesDefaulted...)
+}
+
+func (m *GoTest) GetF_Sint32Defaulted() int32 {
+	if m != nil && m.F_Sint32Defaulted != nil {
+		return *m.F_Sint32Defaulted
+	}
+	return Default_GoTest_F_Sint32Defaulted
+}
+
+func (m *GoTest) GetF_Sint64Defaulted() int64 {
+	if m != nil && m.F_Sint64Defaulted != nil {
+		return *m.F_Sint64Defaulted
+	}
+	return Default_GoTest_F_Sint64Defaulted
+}
+
+func (m *GoTest) GetF_Sfixed32Defaulted() int32 {
+	if m != nil && m.F_Sfixed32Defaulted != nil {
+		return *m.F_Sfixed32Defaulted
+	}
+	return Default_GoTest_F_Sfixed32Defaulted
+}
+
+func (m *GoTest) GetF_Sfixed64Defaulted() int64 {
+	if m != nil && m.F_Sfixed64Defaulted != nil {
+		return *m.F_Sfixed64Defaulted
+	}
+	return Default_GoTest_F_Sfixed64Defaulted
+}
+
+func (m *GoTest) GetF_BoolRepeatedPacked() []bool {
+	if m != nil {
+		return m.F_BoolRepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Int32RepeatedPacked() []int32 {
+	if m != nil {
+		return m.F_Int32RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Int64RepeatedPacked() []int64 {
+	if m != nil {
+		return m.F_Int64RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Fixed32RepeatedPacked() []uint32 {
+	if m != nil {
+		return m.F_Fixed32RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Fixed64RepeatedPacked() []uint64 {
+	if m != nil {
+		return m.F_Fixed64RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Uint32RepeatedPacked() []uint32 {
+	if m != nil {
+		return m.F_Uint32RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Uint64RepeatedPacked() []uint64 {
+	if m != nil {
+		return m.F_Uint64RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_FloatRepeatedPacked() []float32 {
+	if m != nil {
+		return m.F_FloatRepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_DoubleRepeatedPacked() []float64 {
+	if m != nil {
+		return m.F_DoubleRepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sint32RepeatedPacked() []int32 {
+	if m != nil {
+		return m.F_Sint32RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sint64RepeatedPacked() []int64 {
+	if m != nil {
+		return m.F_Sint64RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sfixed32RepeatedPacked() []int32 {
+	if m != nil {
+		return m.F_Sfixed32RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetF_Sfixed64RepeatedPacked() []int64 {
+	if m != nil {
+		return m.F_Sfixed64RepeatedPacked
+	}
+	return nil
+}
+
+func (m *GoTest) GetRequiredgroup() *GoTest_RequiredGroup {
+	if m != nil {
+		return m.Requiredgroup
+	}
+	return nil
+}
+
+func (m *GoTest) GetRepeatedgroup() []*GoTest_RepeatedGroup {
+	if m != nil {
+		return m.Repeatedgroup
+	}
+	return nil
+}
+
+func (m *GoTest) GetOptionalgroup() *GoTest_OptionalGroup {
+	if m != nil {
+		return m.Optionalgroup
+	}
+	return nil
+}
+
+// Required, repeated, and optional groups.
+type GoTest_RequiredGroup struct {
+	RequiredField        *string  `protobuf:"bytes,71,req,name=RequiredField" json:"RequiredField,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GoTest_RequiredGroup) Reset()         { *m = GoTest_RequiredGroup{} }
+func (m *GoTest_RequiredGroup) String() string { return proto.CompactTextString(m) }
+func (*GoTest_RequiredGroup) ProtoMessage()    {}
+func (*GoTest_RequiredGroup) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{2, 0}
+}
+func (m *GoTest_RequiredGroup) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoTest_RequiredGroup.Unmarshal(m, b)
+}
+func (m *GoTest_RequiredGroup) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoTest_RequiredGroup.Marshal(b, m, deterministic)
+}
+func (dst *GoTest_RequiredGroup) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoTest_RequiredGroup.Merge(dst, src)
+}
+func (m *GoTest_RequiredGroup) XXX_Size() int {
+	return xxx_messageInfo_GoTest_RequiredGroup.Size(m)
+}
+func (m *GoTest_RequiredGroup) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoTest_RequiredGroup.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoTest_RequiredGroup proto.InternalMessageInfo
+
+func (m *GoTest_RequiredGroup) GetRequiredField() string {
+	if m != nil && m.RequiredField != nil {
+		return *m.RequiredField
+	}
+	return ""
+}
+
+type GoTest_RepeatedGroup struct {
+	RequiredField        *string  `protobuf:"bytes,81,req,name=RequiredField" json:"RequiredField,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GoTest_RepeatedGroup) Reset()         { *m = GoTest_RepeatedGroup{} }
+func (m *GoTest_RepeatedGroup) String() string { return proto.CompactTextString(m) }
+func (*GoTest_RepeatedGroup) ProtoMessage()    {}
+func (*GoTest_RepeatedGroup) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{2, 1}
+}
+func (m *GoTest_RepeatedGroup) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoTest_RepeatedGroup.Unmarshal(m, b)
+}
+func (m *GoTest_RepeatedGroup) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoTest_RepeatedGroup.Marshal(b, m, deterministic)
+}
+func (dst *GoTest_RepeatedGroup) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoTest_RepeatedGroup.Merge(dst, src)
+}
+func (m *GoTest_RepeatedGroup) XXX_Size() int {
+	return xxx_messageInfo_GoTest_RepeatedGroup.Size(m)
+}
+func (m *GoTest_RepeatedGroup) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoTest_RepeatedGroup.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoTest_RepeatedGroup proto.InternalMessageInfo
+
+func (m *GoTest_RepeatedGroup) GetRequiredField() string {
+	if m != nil && m.RequiredField != nil {
+		return *m.RequiredField
+	}
+	return ""
+}
+
+type GoTest_OptionalGroup struct {
+	RequiredField        *string  `protobuf:"bytes,91,req,name=RequiredField" json:"RequiredField,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GoTest_OptionalGroup) Reset()         { *m = GoTest_OptionalGroup{} }
+func (m *GoTest_OptionalGroup) String() string { return proto.CompactTextString(m) }
+func (*GoTest_OptionalGroup) ProtoMessage()    {}
+func (*GoTest_OptionalGroup) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{2, 2}
+}
+func (m *GoTest_OptionalGroup) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoTest_OptionalGroup.Unmarshal(m, b)
+}
+func (m *GoTest_OptionalGroup) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoTest_OptionalGroup.Marshal(b, m, deterministic)
+}
+func (dst *GoTest_OptionalGroup) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoTest_OptionalGroup.Merge(dst, src)
+}
+func (m *GoTest_OptionalGroup) XXX_Size() int {
+	return xxx_messageInfo_GoTest_OptionalGroup.Size(m)
+}
+func (m *GoTest_OptionalGroup) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoTest_OptionalGroup.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoTest_OptionalGroup proto.InternalMessageInfo
+
+func (m *GoTest_OptionalGroup) GetRequiredField() string {
+	if m != nil && m.RequiredField != nil {
+		return *m.RequiredField
+	}
+	return ""
+}
+
+// For testing a group containing a required field.
+type GoTestRequiredGroupField struct {
+	Group                *GoTestRequiredGroupField_Group `protobuf:"group,1,req,name=Group,json=group" json:"group,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                        `json:"-"`
+	XXX_unrecognized     []byte                          `json:"-"`
+	XXX_sizecache        int32                           `json:"-"`
+}
+
+func (m *GoTestRequiredGroupField) Reset()         { *m = GoTestRequiredGroupField{} }
+func (m *GoTestRequiredGroupField) String() string { return proto.CompactTextString(m) }
+func (*GoTestRequiredGroupField) ProtoMessage()    {}
+func (*GoTestRequiredGroupField) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{3}
+}
+func (m *GoTestRequiredGroupField) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoTestRequiredGroupField.Unmarshal(m, b)
+}
+func (m *GoTestRequiredGroupField) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoTestRequiredGroupField.Marshal(b, m, deterministic)
+}
+func (dst *GoTestRequiredGroupField) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoTestRequiredGroupField.Merge(dst, src)
+}
+func (m *GoTestRequiredGroupField) XXX_Size() int {
+	return xxx_messageInfo_GoTestRequiredGroupField.Size(m)
+}
+func (m *GoTestRequiredGroupField) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoTestRequiredGroupField.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoTestRequiredGroupField proto.InternalMessageInfo
+
+func (m *GoTestRequiredGroupField) GetGroup() *GoTestRequiredGroupField_Group {
+	if m != nil {
+		return m.Group
+	}
+	return nil
+}
+
+type GoTestRequiredGroupField_Group struct {
+	Field                *int32   `protobuf:"varint,2,req,name=Field" json:"Field,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GoTestRequiredGroupField_Group) Reset()         { *m = GoTestRequiredGroupField_Group{} }
+func (m *GoTestRequiredGroupField_Group) String() string { return proto.CompactTextString(m) }
+func (*GoTestRequiredGroupField_Group) ProtoMessage()    {}
+func (*GoTestRequiredGroupField_Group) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{3, 0}
+}
+func (m *GoTestRequiredGroupField_Group) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoTestRequiredGroupField_Group.Unmarshal(m, b)
+}
+func (m *GoTestRequiredGroupField_Group) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoTestRequiredGroupField_Group.Marshal(b, m, deterministic)
+}
+func (dst *GoTestRequiredGroupField_Group) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoTestRequiredGroupField_Group.Merge(dst, src)
+}
+func (m *GoTestRequiredGroupField_Group) XXX_Size() int {
+	return xxx_messageInfo_GoTestRequiredGroupField_Group.Size(m)
+}
+func (m *GoTestRequiredGroupField_Group) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoTestRequiredGroupField_Group.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoTestRequiredGroupField_Group proto.InternalMessageInfo
+
+func (m *GoTestRequiredGroupField_Group) GetField() int32 {
+	if m != nil && m.Field != nil {
+		return *m.Field
+	}
+	return 0
+}
+
+// For testing skipping of unrecognized fields.
+// Numbers are all big, larger than tag numbers in GoTestField,
+// the message used in the corresponding test.
+type GoSkipTest struct {
+	SkipInt32            *int32                `protobuf:"varint,11,req,name=skip_int32,json=skipInt32" json:"skip_int32,omitempty"`
+	SkipFixed32          *uint32               `protobuf:"fixed32,12,req,name=skip_fixed32,json=skipFixed32" json:"skip_fixed32,omitempty"`
+	SkipFixed64          *uint64               `protobuf:"fixed64,13,req,name=skip_fixed64,json=skipFixed64" json:"skip_fixed64,omitempty"`
+	SkipString           *string               `protobuf:"bytes,14,req,name=skip_string,json=skipString" json:"skip_string,omitempty"`
+	Skipgroup            *GoSkipTest_SkipGroup `protobuf:"group,15,req,name=SkipGroup,json=skipgroup" json:"skipgroup,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}              `json:"-"`
+	XXX_unrecognized     []byte                `json:"-"`
+	XXX_sizecache        int32                 `json:"-"`
+}
+
+func (m *GoSkipTest) Reset()         { *m = GoSkipTest{} }
+func (m *GoSkipTest) String() string { return proto.CompactTextString(m) }
+func (*GoSkipTest) ProtoMessage()    {}
+func (*GoSkipTest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{4}
+}
+func (m *GoSkipTest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoSkipTest.Unmarshal(m, b)
+}
+func (m *GoSkipTest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoSkipTest.Marshal(b, m, deterministic)
+}
+func (dst *GoSkipTest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoSkipTest.Merge(dst, src)
+}
+func (m *GoSkipTest) XXX_Size() int {
+	return xxx_messageInfo_GoSkipTest.Size(m)
+}
+func (m *GoSkipTest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoSkipTest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoSkipTest proto.InternalMessageInfo
+
+func (m *GoSkipTest) GetSkipInt32() int32 {
+	if m != nil && m.SkipInt32 != nil {
+		return *m.SkipInt32
+	}
+	return 0
+}
+
+func (m *GoSkipTest) GetSkipFixed32() uint32 {
+	if m != nil && m.SkipFixed32 != nil {
+		return *m.SkipFixed32
+	}
+	return 0
+}
+
+func (m *GoSkipTest) GetSkipFixed64() uint64 {
+	if m != nil && m.SkipFixed64 != nil {
+		return *m.SkipFixed64
+	}
+	return 0
+}
+
+func (m *GoSkipTest) GetSkipString() string {
+	if m != nil && m.SkipString != nil {
+		return *m.SkipString
+	}
+	return ""
+}
+
+func (m *GoSkipTest) GetSkipgroup() *GoSkipTest_SkipGroup {
+	if m != nil {
+		return m.Skipgroup
+	}
+	return nil
+}
+
+type GoSkipTest_SkipGroup struct {
+	GroupInt32           *int32   `protobuf:"varint,16,req,name=group_int32,json=groupInt32" json:"group_int32,omitempty"`
+	GroupString          *string  `protobuf:"bytes,17,req,name=group_string,json=groupString" json:"group_string,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GoSkipTest_SkipGroup) Reset()         { *m = GoSkipTest_SkipGroup{} }
+func (m *GoSkipTest_SkipGroup) String() string { return proto.CompactTextString(m) }
+func (*GoSkipTest_SkipGroup) ProtoMessage()    {}
+func (*GoSkipTest_SkipGroup) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{4, 0}
+}
+func (m *GoSkipTest_SkipGroup) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GoSkipTest_SkipGroup.Unmarshal(m, b)
+}
+func (m *GoSkipTest_SkipGroup) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GoSkipTest_SkipGroup.Marshal(b, m, deterministic)
+}
+func (dst *GoSkipTest_SkipGroup) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GoSkipTest_SkipGroup.Merge(dst, src)
+}
+func (m *GoSkipTest_SkipGroup) XXX_Size() int {
+	return xxx_messageInfo_GoSkipTest_SkipGroup.Size(m)
+}
+func (m *GoSkipTest_SkipGroup) XXX_DiscardUnknown() {
+	xxx_messageInfo_GoSkipTest_SkipGroup.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GoSkipTest_SkipGroup proto.InternalMessageInfo
+
+func (m *GoSkipTest_SkipGroup) GetGroupInt32() int32 {
+	if m != nil && m.GroupInt32 != nil {
+		return *m.GroupInt32
+	}
+	return 0
+}
+
+func (m *GoSkipTest_SkipGroup) GetGroupString() string {
+	if m != nil && m.GroupString != nil {
+		return *m.GroupString
+	}
+	return ""
+}
+
+// For testing packed/non-packed decoder switching.
+// A serialized instance of one should be deserializable as the other.
+type NonPackedTest struct {
+	A                    []int32  `protobuf:"varint,1,rep,name=a" json:"a,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *NonPackedTest) Reset()         { *m = NonPackedTest{} }
+func (m *NonPackedTest) String() string { return proto.CompactTextString(m) }
+func (*NonPackedTest) ProtoMessage()    {}
+func (*NonPackedTest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{5}
+}
+func (m *NonPackedTest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NonPackedTest.Unmarshal(m, b)
+}
+func (m *NonPackedTest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NonPackedTest.Marshal(b, m, deterministic)
+}
+func (dst *NonPackedTest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NonPackedTest.Merge(dst, src)
+}
+func (m *NonPackedTest) XXX_Size() int {
+	return xxx_messageInfo_NonPackedTest.Size(m)
+}
+func (m *NonPackedTest) XXX_DiscardUnknown() {
+	xxx_messageInfo_NonPackedTest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NonPackedTest proto.InternalMessageInfo
+
+func (m *NonPackedTest) GetA() []int32 {
+	if m != nil {
+		return m.A
+	}
+	return nil
+}
+
+type PackedTest struct {
+	B                    []int32  `protobuf:"varint,1,rep,packed,name=b" json:"b,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *PackedTest) Reset()         { *m = PackedTest{} }
+func (m *PackedTest) String() string { return proto.CompactTextString(m) }
+func (*PackedTest) ProtoMessage()    {}
+func (*PackedTest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{6}
+}
+func (m *PackedTest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_PackedTest.Unmarshal(m, b)
+}
+func (m *PackedTest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_PackedTest.Marshal(b, m, deterministic)
+}
+func (dst *PackedTest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_PackedTest.Merge(dst, src)
+}
+func (m *PackedTest) XXX_Size() int {
+	return xxx_messageInfo_PackedTest.Size(m)
+}
+func (m *PackedTest) XXX_DiscardUnknown() {
+	xxx_messageInfo_PackedTest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_PackedTest proto.InternalMessageInfo
+
+func (m *PackedTest) GetB() []int32 {
+	if m != nil {
+		return m.B
+	}
+	return nil
+}
+
+type MaxTag struct {
+	// Maximum possible tag number.
+	LastField            *string  `protobuf:"bytes,536870911,opt,name=last_field,json=lastField" json:"last_field,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *MaxTag) Reset()         { *m = MaxTag{} }
+func (m *MaxTag) String() string { return proto.CompactTextString(m) }
+func (*MaxTag) ProtoMessage()    {}
+func (*MaxTag) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{7}
+}
+func (m *MaxTag) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MaxTag.Unmarshal(m, b)
+}
+func (m *MaxTag) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MaxTag.Marshal(b, m, deterministic)
+}
+func (dst *MaxTag) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MaxTag.Merge(dst, src)
+}
+func (m *MaxTag) XXX_Size() int {
+	return xxx_messageInfo_MaxTag.Size(m)
+}
+func (m *MaxTag) XXX_DiscardUnknown() {
+	xxx_messageInfo_MaxTag.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MaxTag proto.InternalMessageInfo
+
+func (m *MaxTag) GetLastField() string {
+	if m != nil && m.LastField != nil {
+		return *m.LastField
+	}
+	return ""
+}
+
+type OldMessage struct {
+	Nested               *OldMessage_Nested `protobuf:"bytes,1,opt,name=nested" json:"nested,omitempty"`
+	Num                  *int32             `protobuf:"varint,2,opt,name=num" json:"num,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}           `json:"-"`
+	XXX_unrecognized     []byte             `json:"-"`
+	XXX_sizecache        int32              `json:"-"`
+}
+
+func (m *OldMessage) Reset()         { *m = OldMessage{} }
+func (m *OldMessage) String() string { return proto.CompactTextString(m) }
+func (*OldMessage) ProtoMessage()    {}
+func (*OldMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{8}
+}
+func (m *OldMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OldMessage.Unmarshal(m, b)
+}
+func (m *OldMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OldMessage.Marshal(b, m, deterministic)
+}
+func (dst *OldMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OldMessage.Merge(dst, src)
+}
+func (m *OldMessage) XXX_Size() int {
+	return xxx_messageInfo_OldMessage.Size(m)
+}
+func (m *OldMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_OldMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OldMessage proto.InternalMessageInfo
+
+func (m *OldMessage) GetNested() *OldMessage_Nested {
+	if m != nil {
+		return m.Nested
+	}
+	return nil
+}
+
+func (m *OldMessage) GetNum() int32 {
+	if m != nil && m.Num != nil {
+		return *m.Num
+	}
+	return 0
+}
+
+type OldMessage_Nested struct {
+	Name                 *string  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *OldMessage_Nested) Reset()         { *m = OldMessage_Nested{} }
+func (m *OldMessage_Nested) String() string { return proto.CompactTextString(m) }
+func (*OldMessage_Nested) ProtoMessage()    {}
+func (*OldMessage_Nested) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{8, 0}
+}
+func (m *OldMessage_Nested) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OldMessage_Nested.Unmarshal(m, b)
+}
+func (m *OldMessage_Nested) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OldMessage_Nested.Marshal(b, m, deterministic)
+}
+func (dst *OldMessage_Nested) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OldMessage_Nested.Merge(dst, src)
+}
+func (m *OldMessage_Nested) XXX_Size() int {
+	return xxx_messageInfo_OldMessage_Nested.Size(m)
+}
+func (m *OldMessage_Nested) XXX_DiscardUnknown() {
+	xxx_messageInfo_OldMessage_Nested.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OldMessage_Nested proto.InternalMessageInfo
+
+func (m *OldMessage_Nested) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+// NewMessage is wire compatible with OldMessage;
+// imagine it as a future version.
+type NewMessage struct {
+	Nested *NewMessage_Nested `protobuf:"bytes,1,opt,name=nested" json:"nested,omitempty"`
+	// This is an int32 in OldMessage.
+	Num                  *int64   `protobuf:"varint,2,opt,name=num" json:"num,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *NewMessage) Reset()         { *m = NewMessage{} }
+func (m *NewMessage) String() string { return proto.CompactTextString(m) }
+func (*NewMessage) ProtoMessage()    {}
+func (*NewMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{9}
+}
+func (m *NewMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NewMessage.Unmarshal(m, b)
+}
+func (m *NewMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NewMessage.Marshal(b, m, deterministic)
+}
+func (dst *NewMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NewMessage.Merge(dst, src)
+}
+func (m *NewMessage) XXX_Size() int {
+	return xxx_messageInfo_NewMessage.Size(m)
+}
+func (m *NewMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_NewMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NewMessage proto.InternalMessageInfo
+
+func (m *NewMessage) GetNested() *NewMessage_Nested {
+	if m != nil {
+		return m.Nested
+	}
+	return nil
+}
+
+func (m *NewMessage) GetNum() int64 {
+	if m != nil && m.Num != nil {
+		return *m.Num
+	}
+	return 0
+}
+
+type NewMessage_Nested struct {
+	Name                 *string  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	FoodGroup            *string  `protobuf:"bytes,2,opt,name=food_group,json=foodGroup" json:"food_group,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *NewMessage_Nested) Reset()         { *m = NewMessage_Nested{} }
+func (m *NewMessage_Nested) String() string { return proto.CompactTextString(m) }
+func (*NewMessage_Nested) ProtoMessage()    {}
+func (*NewMessage_Nested) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{9, 0}
+}
+func (m *NewMessage_Nested) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NewMessage_Nested.Unmarshal(m, b)
+}
+func (m *NewMessage_Nested) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NewMessage_Nested.Marshal(b, m, deterministic)
+}
+func (dst *NewMessage_Nested) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NewMessage_Nested.Merge(dst, src)
+}
+func (m *NewMessage_Nested) XXX_Size() int {
+	return xxx_messageInfo_NewMessage_Nested.Size(m)
+}
+func (m *NewMessage_Nested) XXX_DiscardUnknown() {
+	xxx_messageInfo_NewMessage_Nested.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NewMessage_Nested proto.InternalMessageInfo
+
+func (m *NewMessage_Nested) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *NewMessage_Nested) GetFoodGroup() string {
+	if m != nil && m.FoodGroup != nil {
+		return *m.FoodGroup
+	}
+	return ""
+}
+
+type InnerMessage struct {
+	Host                 *string  `protobuf:"bytes,1,req,name=host" json:"host,omitempty"`
+	Port                 *int32   `protobuf:"varint,2,opt,name=port,def=4000" json:"port,omitempty"`
+	Connected            *bool    `protobuf:"varint,3,opt,name=connected" json:"connected,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *InnerMessage) Reset()         { *m = InnerMessage{} }
+func (m *InnerMessage) String() string { return proto.CompactTextString(m) }
+func (*InnerMessage) ProtoMessage()    {}
+func (*InnerMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{10}
+}
+func (m *InnerMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_InnerMessage.Unmarshal(m, b)
+}
+func (m *InnerMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_InnerMessage.Marshal(b, m, deterministic)
+}
+func (dst *InnerMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_InnerMessage.Merge(dst, src)
+}
+func (m *InnerMessage) XXX_Size() int {
+	return xxx_messageInfo_InnerMessage.Size(m)
+}
+func (m *InnerMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_InnerMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_InnerMessage proto.InternalMessageInfo
+
+const Default_InnerMessage_Port int32 = 4000
+
+func (m *InnerMessage) GetHost() string {
+	if m != nil && m.Host != nil {
+		return *m.Host
+	}
+	return ""
+}
+
+func (m *InnerMessage) GetPort() int32 {
+	if m != nil && m.Port != nil {
+		return *m.Port
+	}
+	return Default_InnerMessage_Port
+}
+
+func (m *InnerMessage) GetConnected() bool {
+	if m != nil && m.Connected != nil {
+		return *m.Connected
+	}
+	return false
+}
+
+type OtherMessage struct {
+	Key                          *int64        `protobuf:"varint,1,opt,name=key" json:"key,omitempty"`
+	Value                        []byte        `protobuf:"bytes,2,opt,name=value" json:"value,omitempty"`
+	Weight                       *float32      `protobuf:"fixed32,3,opt,name=weight" json:"weight,omitempty"`
+	Inner                        *InnerMessage `protobuf:"bytes,4,opt,name=inner" json:"inner,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}      `json:"-"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
+}
+
+func (m *OtherMessage) Reset()         { *m = OtherMessage{} }
+func (m *OtherMessage) String() string { return proto.CompactTextString(m) }
+func (*OtherMessage) ProtoMessage()    {}
+func (*OtherMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{11}
+}
+
+var extRange_OtherMessage = []proto.ExtensionRange{
+	{Start: 100, End: 536870911},
+}
+
+func (*OtherMessage) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_OtherMessage
+}
+func (m *OtherMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OtherMessage.Unmarshal(m, b)
+}
+func (m *OtherMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OtherMessage.Marshal(b, m, deterministic)
+}
+func (dst *OtherMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OtherMessage.Merge(dst, src)
+}
+func (m *OtherMessage) XXX_Size() int {
+	return xxx_messageInfo_OtherMessage.Size(m)
+}
+func (m *OtherMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_OtherMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OtherMessage proto.InternalMessageInfo
+
+func (m *OtherMessage) GetKey() int64 {
+	if m != nil && m.Key != nil {
+		return *m.Key
+	}
+	return 0
+}
+
+func (m *OtherMessage) GetValue() []byte {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+func (m *OtherMessage) GetWeight() float32 {
+	if m != nil && m.Weight != nil {
+		return *m.Weight
+	}
+	return 0
+}
+
+func (m *OtherMessage) GetInner() *InnerMessage {
+	if m != nil {
+		return m.Inner
+	}
+	return nil
+}
+
+type RequiredInnerMessage struct {
+	LeoFinallyWonAnOscar *InnerMessage `protobuf:"bytes,1,req,name=leo_finally_won_an_oscar,json=leoFinallyWonAnOscar" json:"leo_finally_won_an_oscar,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}      `json:"-"`
+	XXX_unrecognized     []byte        `json:"-"`
+	XXX_sizecache        int32         `json:"-"`
+}
+
+func (m *RequiredInnerMessage) Reset()         { *m = RequiredInnerMessage{} }
+func (m *RequiredInnerMessage) String() string { return proto.CompactTextString(m) }
+func (*RequiredInnerMessage) ProtoMessage()    {}
+func (*RequiredInnerMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{12}
+}
+func (m *RequiredInnerMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RequiredInnerMessage.Unmarshal(m, b)
+}
+func (m *RequiredInnerMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RequiredInnerMessage.Marshal(b, m, deterministic)
+}
+func (dst *RequiredInnerMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RequiredInnerMessage.Merge(dst, src)
+}
+func (m *RequiredInnerMessage) XXX_Size() int {
+	return xxx_messageInfo_RequiredInnerMessage.Size(m)
+}
+func (m *RequiredInnerMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_RequiredInnerMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RequiredInnerMessage proto.InternalMessageInfo
+
+func (m *RequiredInnerMessage) GetLeoFinallyWonAnOscar() *InnerMessage {
+	if m != nil {
+		return m.LeoFinallyWonAnOscar
+	}
+	return nil
+}
+
+type MyMessage struct {
+	Count          *int32                `protobuf:"varint,1,req,name=count" json:"count,omitempty"`
+	Name           *string               `protobuf:"bytes,2,opt,name=name" json:"name,omitempty"`
+	Quote          *string               `protobuf:"bytes,3,opt,name=quote" json:"quote,omitempty"`
+	Pet            []string              `protobuf:"bytes,4,rep,name=pet" json:"pet,omitempty"`
+	Inner          *InnerMessage         `protobuf:"bytes,5,opt,name=inner" json:"inner,omitempty"`
+	Others         []*OtherMessage       `protobuf:"bytes,6,rep,name=others" json:"others,omitempty"`
+	WeMustGoDeeper *RequiredInnerMessage `protobuf:"bytes,13,opt,name=we_must_go_deeper,json=weMustGoDeeper" json:"we_must_go_deeper,omitempty"`
+	RepInner       []*InnerMessage       `protobuf:"bytes,12,rep,name=rep_inner,json=repInner" json:"rep_inner,omitempty"`
+	Bikeshed       *MyMessage_Color      `protobuf:"varint,7,opt,name=bikeshed,enum=test_proto.MyMessage_Color" json:"bikeshed,omitempty"`
+	Somegroup      *MyMessage_SomeGroup  `protobuf:"group,8,opt,name=SomeGroup,json=somegroup" json:"somegroup,omitempty"`
+	// This field becomes [][]byte in the generated code.
+	RepBytes                     [][]byte `protobuf:"bytes,10,rep,name=rep_bytes,json=repBytes" json:"rep_bytes,omitempty"`
+	Bigfloat                     *float64 `protobuf:"fixed64,11,opt,name=bigfloat" json:"bigfloat,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
+}
+
+func (m *MyMessage) Reset()         { *m = MyMessage{} }
+func (m *MyMessage) String() string { return proto.CompactTextString(m) }
+func (*MyMessage) ProtoMessage()    {}
+func (*MyMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{13}
+}
+
+var extRange_MyMessage = []proto.ExtensionRange{
+	{Start: 100, End: 536870911},
+}
+
+func (*MyMessage) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_MyMessage
+}
+func (m *MyMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MyMessage.Unmarshal(m, b)
+}
+func (m *MyMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MyMessage.Marshal(b, m, deterministic)
+}
+func (dst *MyMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MyMessage.Merge(dst, src)
+}
+func (m *MyMessage) XXX_Size() int {
+	return xxx_messageInfo_MyMessage.Size(m)
+}
+func (m *MyMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_MyMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MyMessage proto.InternalMessageInfo
+
+func (m *MyMessage) GetCount() int32 {
+	if m != nil && m.Count != nil {
+		return *m.Count
+	}
+	return 0
+}
+
+func (m *MyMessage) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *MyMessage) GetQuote() string {
+	if m != nil && m.Quote != nil {
+		return *m.Quote
+	}
+	return ""
+}
+
+func (m *MyMessage) GetPet() []string {
+	if m != nil {
+		return m.Pet
+	}
+	return nil
+}
+
+func (m *MyMessage) GetInner() *InnerMessage {
+	if m != nil {
+		return m.Inner
+	}
+	return nil
+}
+
+func (m *MyMessage) GetOthers() []*OtherMessage {
+	if m != nil {
+		return m.Others
+	}
+	return nil
+}
+
+func (m *MyMessage) GetWeMustGoDeeper() *RequiredInnerMessage {
+	if m != nil {
+		return m.WeMustGoDeeper
+	}
+	return nil
+}
+
+func (m *MyMessage) GetRepInner() []*InnerMessage {
+	if m != nil {
+		return m.RepInner
+	}
+	return nil
+}
+
+func (m *MyMessage) GetBikeshed() MyMessage_Color {
+	if m != nil && m.Bikeshed != nil {
+		return *m.Bikeshed
+	}
+	return MyMessage_RED
+}
+
+func (m *MyMessage) GetSomegroup() *MyMessage_SomeGroup {
+	if m != nil {
+		return m.Somegroup
+	}
+	return nil
+}
+
+func (m *MyMessage) GetRepBytes() [][]byte {
+	if m != nil {
+		return m.RepBytes
+	}
+	return nil
+}
+
+func (m *MyMessage) GetBigfloat() float64 {
+	if m != nil && m.Bigfloat != nil {
+		return *m.Bigfloat
+	}
+	return 0
+}
+
+type MyMessage_SomeGroup struct {
+	GroupField           *int32   `protobuf:"varint,9,opt,name=group_field,json=groupField" json:"group_field,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *MyMessage_SomeGroup) Reset()         { *m = MyMessage_SomeGroup{} }
+func (m *MyMessage_SomeGroup) String() string { return proto.CompactTextString(m) }
+func (*MyMessage_SomeGroup) ProtoMessage()    {}
+func (*MyMessage_SomeGroup) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{13, 0}
+}
+func (m *MyMessage_SomeGroup) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MyMessage_SomeGroup.Unmarshal(m, b)
+}
+func (m *MyMessage_SomeGroup) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MyMessage_SomeGroup.Marshal(b, m, deterministic)
+}
+func (dst *MyMessage_SomeGroup) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MyMessage_SomeGroup.Merge(dst, src)
+}
+func (m *MyMessage_SomeGroup) XXX_Size() int {
+	return xxx_messageInfo_MyMessage_SomeGroup.Size(m)
+}
+func (m *MyMessage_SomeGroup) XXX_DiscardUnknown() {
+	xxx_messageInfo_MyMessage_SomeGroup.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MyMessage_SomeGroup proto.InternalMessageInfo
+
+func (m *MyMessage_SomeGroup) GetGroupField() int32 {
+	if m != nil && m.GroupField != nil {
+		return *m.GroupField
+	}
+	return 0
+}
+
+type Ext struct {
+	Data                 *string         `protobuf:"bytes,1,opt,name=data" json:"data,omitempty"`
+	MapField             map[int32]int32 `protobuf:"bytes,2,rep,name=map_field,json=mapField" json:"map_field,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"varint,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
+}
+
+func (m *Ext) Reset()         { *m = Ext{} }
+func (m *Ext) String() string { return proto.CompactTextString(m) }
+func (*Ext) ProtoMessage()    {}
+func (*Ext) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{14}
+}
+func (m *Ext) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Ext.Unmarshal(m, b)
+}
+func (m *Ext) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Ext.Marshal(b, m, deterministic)
+}
+func (dst *Ext) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Ext.Merge(dst, src)
+}
+func (m *Ext) XXX_Size() int {
+	return xxx_messageInfo_Ext.Size(m)
+}
+func (m *Ext) XXX_DiscardUnknown() {
+	xxx_messageInfo_Ext.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Ext proto.InternalMessageInfo
+
+func (m *Ext) GetData() string {
+	if m != nil && m.Data != nil {
+		return *m.Data
+	}
+	return ""
+}
+
+func (m *Ext) GetMapField() map[int32]int32 {
+	if m != nil {
+		return m.MapField
+	}
+	return nil
+}
+
+var E_Ext_More = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessage)(nil),
+	ExtensionType: (*Ext)(nil),
+	Field:         103,
+	Name:          "test_proto.Ext.more",
+	Tag:           "bytes,103,opt,name=more",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_Ext_Text = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessage)(nil),
+	ExtensionType: (*string)(nil),
+	Field:         104,
+	Name:          "test_proto.Ext.text",
+	Tag:           "bytes,104,opt,name=text",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_Ext_Number = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         105,
+	Name:          "test_proto.Ext.number",
+	Tag:           "varint,105,opt,name=number",
+	Filename:      "test_proto/test.proto",
+}
+
+type ComplexExtension struct {
+	First                *int32   `protobuf:"varint,1,opt,name=first" json:"first,omitempty"`
+	Second               *int32   `protobuf:"varint,2,opt,name=second" json:"second,omitempty"`
+	Third                []int32  `protobuf:"varint,3,rep,name=third" json:"third,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ComplexExtension) Reset()         { *m = ComplexExtension{} }
+func (m *ComplexExtension) String() string { return proto.CompactTextString(m) }
+func (*ComplexExtension) ProtoMessage()    {}
+func (*ComplexExtension) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{15}
+}
+func (m *ComplexExtension) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ComplexExtension.Unmarshal(m, b)
+}
+func (m *ComplexExtension) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ComplexExtension.Marshal(b, m, deterministic)
+}
+func (dst *ComplexExtension) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ComplexExtension.Merge(dst, src)
+}
+func (m *ComplexExtension) XXX_Size() int {
+	return xxx_messageInfo_ComplexExtension.Size(m)
+}
+func (m *ComplexExtension) XXX_DiscardUnknown() {
+	xxx_messageInfo_ComplexExtension.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ComplexExtension proto.InternalMessageInfo
+
+func (m *ComplexExtension) GetFirst() int32 {
+	if m != nil && m.First != nil {
+		return *m.First
+	}
+	return 0
+}
+
+func (m *ComplexExtension) GetSecond() int32 {
+	if m != nil && m.Second != nil {
+		return *m.Second
+	}
+	return 0
+}
+
+func (m *ComplexExtension) GetThird() []int32 {
+	if m != nil {
+		return m.Third
+	}
+	return nil
+}
+
+type DefaultsMessage struct {
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
+}
+
+func (m *DefaultsMessage) Reset()         { *m = DefaultsMessage{} }
+func (m *DefaultsMessage) String() string { return proto.CompactTextString(m) }
+func (*DefaultsMessage) ProtoMessage()    {}
+func (*DefaultsMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{16}
+}
+
+var extRange_DefaultsMessage = []proto.ExtensionRange{
+	{Start: 100, End: 536870911},
+}
+
+func (*DefaultsMessage) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_DefaultsMessage
+}
+func (m *DefaultsMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DefaultsMessage.Unmarshal(m, b)
+}
+func (m *DefaultsMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DefaultsMessage.Marshal(b, m, deterministic)
+}
+func (dst *DefaultsMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DefaultsMessage.Merge(dst, src)
+}
+func (m *DefaultsMessage) XXX_Size() int {
+	return xxx_messageInfo_DefaultsMessage.Size(m)
+}
+func (m *DefaultsMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_DefaultsMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DefaultsMessage proto.InternalMessageInfo
+
+type MyMessageSet struct {
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
+	proto.XXX_InternalExtensions `protobuf_messageset:"1" json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
+}
+
+func (m *MyMessageSet) Reset()         { *m = MyMessageSet{} }
+func (m *MyMessageSet) String() string { return proto.CompactTextString(m) }
+func (*MyMessageSet) ProtoMessage()    {}
+func (*MyMessageSet) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{17}
+}
+
+func (m *MyMessageSet) MarshalJSON() ([]byte, error) {
+	return proto.MarshalMessageSetJSON(&m.XXX_InternalExtensions)
+}
+func (m *MyMessageSet) UnmarshalJSON(buf []byte) error {
+	return proto.UnmarshalMessageSetJSON(buf, &m.XXX_InternalExtensions)
+}
+
+var extRange_MyMessageSet = []proto.ExtensionRange{
+	{Start: 100, End: 2147483646},
+}
+
+func (*MyMessageSet) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_MyMessageSet
+}
+func (m *MyMessageSet) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MyMessageSet.Unmarshal(m, b)
+}
+func (m *MyMessageSet) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MyMessageSet.Marshal(b, m, deterministic)
+}
+func (dst *MyMessageSet) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MyMessageSet.Merge(dst, src)
+}
+func (m *MyMessageSet) XXX_Size() int {
+	return xxx_messageInfo_MyMessageSet.Size(m)
+}
+func (m *MyMessageSet) XXX_DiscardUnknown() {
+	xxx_messageInfo_MyMessageSet.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MyMessageSet proto.InternalMessageInfo
+
+type Empty struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Empty) Reset()         { *m = Empty{} }
+func (m *Empty) String() string { return proto.CompactTextString(m) }
+func (*Empty) ProtoMessage()    {}
+func (*Empty) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{18}
+}
+func (m *Empty) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Empty.Unmarshal(m, b)
+}
+func (m *Empty) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Empty.Marshal(b, m, deterministic)
+}
+func (dst *Empty) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Empty.Merge(dst, src)
+}
+func (m *Empty) XXX_Size() int {
+	return xxx_messageInfo_Empty.Size(m)
+}
+func (m *Empty) XXX_DiscardUnknown() {
+	xxx_messageInfo_Empty.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Empty proto.InternalMessageInfo
+
+type MessageList struct {
+	Message              []*MessageList_Message `protobuf:"group,1,rep,name=Message,json=message" json:"message,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}               `json:"-"`
+	XXX_unrecognized     []byte                 `json:"-"`
+	XXX_sizecache        int32                  `json:"-"`
+}
+
+func (m *MessageList) Reset()         { *m = MessageList{} }
+func (m *MessageList) String() string { return proto.CompactTextString(m) }
+func (*MessageList) ProtoMessage()    {}
+func (*MessageList) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{19}
+}
+func (m *MessageList) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MessageList.Unmarshal(m, b)
+}
+func (m *MessageList) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MessageList.Marshal(b, m, deterministic)
+}
+func (dst *MessageList) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MessageList.Merge(dst, src)
+}
+func (m *MessageList) XXX_Size() int {
+	return xxx_messageInfo_MessageList.Size(m)
+}
+func (m *MessageList) XXX_DiscardUnknown() {
+	xxx_messageInfo_MessageList.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MessageList proto.InternalMessageInfo
+
+func (m *MessageList) GetMessage() []*MessageList_Message {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+type MessageList_Message struct {
+	Name                 *string  `protobuf:"bytes,2,req,name=name" json:"name,omitempty"`
+	Count                *int32   `protobuf:"varint,3,req,name=count" json:"count,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *MessageList_Message) Reset()         { *m = MessageList_Message{} }
+func (m *MessageList_Message) String() string { return proto.CompactTextString(m) }
+func (*MessageList_Message) ProtoMessage()    {}
+func (*MessageList_Message) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{19, 0}
+}
+func (m *MessageList_Message) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MessageList_Message.Unmarshal(m, b)
+}
+func (m *MessageList_Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MessageList_Message.Marshal(b, m, deterministic)
+}
+func (dst *MessageList_Message) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MessageList_Message.Merge(dst, src)
+}
+func (m *MessageList_Message) XXX_Size() int {
+	return xxx_messageInfo_MessageList_Message.Size(m)
+}
+func (m *MessageList_Message) XXX_DiscardUnknown() {
+	xxx_messageInfo_MessageList_Message.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MessageList_Message proto.InternalMessageInfo
+
+func (m *MessageList_Message) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *MessageList_Message) GetCount() int32 {
+	if m != nil && m.Count != nil {
+		return *m.Count
+	}
+	return 0
+}
+
+type Strings struct {
+	StringField          *string  `protobuf:"bytes,1,opt,name=string_field,json=stringField" json:"string_field,omitempty"`
+	BytesField           []byte   `protobuf:"bytes,2,opt,name=bytes_field,json=bytesField" json:"bytes_field,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Strings) Reset()         { *m = Strings{} }
+func (m *Strings) String() string { return proto.CompactTextString(m) }
+func (*Strings) ProtoMessage()    {}
+func (*Strings) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{20}
+}
+func (m *Strings) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Strings.Unmarshal(m, b)
+}
+func (m *Strings) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Strings.Marshal(b, m, deterministic)
+}
+func (dst *Strings) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Strings.Merge(dst, src)
+}
+func (m *Strings) XXX_Size() int {
+	return xxx_messageInfo_Strings.Size(m)
+}
+func (m *Strings) XXX_DiscardUnknown() {
+	xxx_messageInfo_Strings.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Strings proto.InternalMessageInfo
+
+func (m *Strings) GetStringField() string {
+	if m != nil && m.StringField != nil {
+		return *m.StringField
+	}
+	return ""
+}
+
+func (m *Strings) GetBytesField() []byte {
+	if m != nil {
+		return m.BytesField
+	}
+	return nil
+}
+
+type Defaults struct {
+	// Default-valued fields of all basic types.
+	// Same as GoTest, but copied here to make testing easier.
+	F_Bool    *bool           `protobuf:"varint,1,opt,name=F_Bool,json=FBool,def=1" json:"F_Bool,omitempty"`
+	F_Int32   *int32          `protobuf:"varint,2,opt,name=F_Int32,json=FInt32,def=32" json:"F_Int32,omitempty"`
+	F_Int64   *int64          `protobuf:"varint,3,opt,name=F_Int64,json=FInt64,def=64" json:"F_Int64,omitempty"`
+	F_Fixed32 *uint32         `protobuf:"fixed32,4,opt,name=F_Fixed32,json=FFixed32,def=320" json:"F_Fixed32,omitempty"`
+	F_Fixed64 *uint64         `protobuf:"fixed64,5,opt,name=F_Fixed64,json=FFixed64,def=640" json:"F_Fixed64,omitempty"`
+	F_Uint32  *uint32         `protobuf:"varint,6,opt,name=F_Uint32,json=FUint32,def=3200" json:"F_Uint32,omitempty"`
+	F_Uint64  *uint64         `protobuf:"varint,7,opt,name=F_Uint64,json=FUint64,def=6400" json:"F_Uint64,omitempty"`
+	F_Float   *float32        `protobuf:"fixed32,8,opt,name=F_Float,json=FFloat,def=314159" json:"F_Float,omitempty"`
+	F_Double  *float64        `protobuf:"fixed64,9,opt,name=F_Double,json=FDouble,def=271828" json:"F_Double,omitempty"`
+	F_String  *string         `protobuf:"bytes,10,opt,name=F_String,json=FString,def=hello, \"world!\"\n" json:"F_String,omitempty"`
+	F_Bytes   []byte          `protobuf:"bytes,11,opt,name=F_Bytes,json=FBytes,def=Bignose" json:"F_Bytes,omitempty"`
+	F_Sint32  *int32          `protobuf:"zigzag32,12,opt,name=F_Sint32,json=FSint32,def=-32" json:"F_Sint32,omitempty"`
+	F_Sint64  *int64          `protobuf:"zigzag64,13,opt,name=F_Sint64,json=FSint64,def=-64" json:"F_Sint64,omitempty"`
+	F_Enum    *Defaults_Color `protobuf:"varint,14,opt,name=F_Enum,json=FEnum,enum=test_proto.Defaults_Color,def=1" json:"F_Enum,omitempty"`
+	// More fields with crazy defaults.
+	F_Pinf *float32 `protobuf:"fixed32,15,opt,name=F_Pinf,json=FPinf,def=inf" json:"F_Pinf,omitempty"`
+	F_Ninf *float32 `protobuf:"fixed32,16,opt,name=F_Ninf,json=FNinf,def=-inf" json:"F_Ninf,omitempty"`
+	F_Nan  *float32 `protobuf:"fixed32,17,opt,name=F_Nan,json=FNan,def=nan" json:"F_Nan,omitempty"`
+	// Sub-message.
+	Sub *SubDefaults `protobuf:"bytes,18,opt,name=sub" json:"sub,omitempty"`
+	// Redundant but explicit defaults.
+	StrZero              *string  `protobuf:"bytes,19,opt,name=str_zero,json=strZero,def=" json:"str_zero,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Defaults) Reset()         { *m = Defaults{} }
+func (m *Defaults) String() string { return proto.CompactTextString(m) }
+func (*Defaults) ProtoMessage()    {}
+func (*Defaults) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{21}
+}
+func (m *Defaults) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Defaults.Unmarshal(m, b)
+}
+func (m *Defaults) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Defaults.Marshal(b, m, deterministic)
+}
+func (dst *Defaults) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Defaults.Merge(dst, src)
+}
+func (m *Defaults) XXX_Size() int {
+	return xxx_messageInfo_Defaults.Size(m)
+}
+func (m *Defaults) XXX_DiscardUnknown() {
+	xxx_messageInfo_Defaults.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Defaults proto.InternalMessageInfo
+
+const Default_Defaults_F_Bool bool = true
+const Default_Defaults_F_Int32 int32 = 32
+const Default_Defaults_F_Int64 int64 = 64
+const Default_Defaults_F_Fixed32 uint32 = 320
+const Default_Defaults_F_Fixed64 uint64 = 640
+const Default_Defaults_F_Uint32 uint32 = 3200
+const Default_Defaults_F_Uint64 uint64 = 6400
+const Default_Defaults_F_Float float32 = 314159
+const Default_Defaults_F_Double float64 = 271828
+const Default_Defaults_F_String string = "hello, \"world!\"\n"
+
+var Default_Defaults_F_Bytes []byte = []byte("Bignose")
+
+const Default_Defaults_F_Sint32 int32 = -32
+const Default_Defaults_F_Sint64 int64 = -64
+const Default_Defaults_F_Enum Defaults_Color = Defaults_GREEN
+
+var Default_Defaults_F_Pinf float32 = float32(math.Inf(1))
+var Default_Defaults_F_Ninf float32 = float32(math.Inf(-1))
+var Default_Defaults_F_Nan float32 = float32(math.NaN())
+
+func (m *Defaults) GetF_Bool() bool {
+	if m != nil && m.F_Bool != nil {
+		return *m.F_Bool
+	}
+	return Default_Defaults_F_Bool
+}
+
+func (m *Defaults) GetF_Int32() int32 {
+	if m != nil && m.F_Int32 != nil {
+		return *m.F_Int32
+	}
+	return Default_Defaults_F_Int32
+}
+
+func (m *Defaults) GetF_Int64() int64 {
+	if m != nil && m.F_Int64 != nil {
+		return *m.F_Int64
+	}
+	return Default_Defaults_F_Int64
+}
+
+func (m *Defaults) GetF_Fixed32() uint32 {
+	if m != nil && m.F_Fixed32 != nil {
+		return *m.F_Fixed32
+	}
+	return Default_Defaults_F_Fixed32
+}
+
+func (m *Defaults) GetF_Fixed64() uint64 {
+	if m != nil && m.F_Fixed64 != nil {
+		return *m.F_Fixed64
+	}
+	return Default_Defaults_F_Fixed64
+}
+
+func (m *Defaults) GetF_Uint32() uint32 {
+	if m != nil && m.F_Uint32 != nil {
+		return *m.F_Uint32
+	}
+	return Default_Defaults_F_Uint32
+}
+
+func (m *Defaults) GetF_Uint64() uint64 {
+	if m != nil && m.F_Uint64 != nil {
+		return *m.F_Uint64
+	}
+	return Default_Defaults_F_Uint64
+}
+
+func (m *Defaults) GetF_Float() float32 {
+	if m != nil && m.F_Float != nil {
+		return *m.F_Float
+	}
+	return Default_Defaults_F_Float
+}
+
+func (m *Defaults) GetF_Double() float64 {
+	if m != nil && m.F_Double != nil {
+		return *m.F_Double
+	}
+	return Default_Defaults_F_Double
+}
+
+func (m *Defaults) GetF_String() string {
+	if m != nil && m.F_String != nil {
+		return *m.F_String
+	}
+	return Default_Defaults_F_String
+}
+
+func (m *Defaults) GetF_Bytes() []byte {
+	if m != nil && m.F_Bytes != nil {
+		return m.F_Bytes
+	}
+	return append([]byte(nil), Default_Defaults_F_Bytes...)
+}
+
+func (m *Defaults) GetF_Sint32() int32 {
+	if m != nil && m.F_Sint32 != nil {
+		return *m.F_Sint32
+	}
+	return Default_Defaults_F_Sint32
+}
+
+func (m *Defaults) GetF_Sint64() int64 {
+	if m != nil && m.F_Sint64 != nil {
+		return *m.F_Sint64
+	}
+	return Default_Defaults_F_Sint64
+}
+
+func (m *Defaults) GetF_Enum() Defaults_Color {
+	if m != nil && m.F_Enum != nil {
+		return *m.F_Enum
+	}
+	return Default_Defaults_F_Enum
+}
+
+func (m *Defaults) GetF_Pinf() float32 {
+	if m != nil && m.F_Pinf != nil {
+		return *m.F_Pinf
+	}
+	return Default_Defaults_F_Pinf
+}
+
+func (m *Defaults) GetF_Ninf() float32 {
+	if m != nil && m.F_Ninf != nil {
+		return *m.F_Ninf
+	}
+	return Default_Defaults_F_Ninf
+}
+
+func (m *Defaults) GetF_Nan() float32 {
+	if m != nil && m.F_Nan != nil {
+		return *m.F_Nan
+	}
+	return Default_Defaults_F_Nan
+}
+
+func (m *Defaults) GetSub() *SubDefaults {
+	if m != nil {
+		return m.Sub
+	}
+	return nil
+}
+
+func (m *Defaults) GetStrZero() string {
+	if m != nil && m.StrZero != nil {
+		return *m.StrZero
+	}
+	return ""
+}
+
+type SubDefaults struct {
+	N                    *int64   `protobuf:"varint,1,opt,name=n,def=7" json:"n,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SubDefaults) Reset()         { *m = SubDefaults{} }
+func (m *SubDefaults) String() string { return proto.CompactTextString(m) }
+func (*SubDefaults) ProtoMessage()    {}
+func (*SubDefaults) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{22}
+}
+func (m *SubDefaults) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SubDefaults.Unmarshal(m, b)
+}
+func (m *SubDefaults) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SubDefaults.Marshal(b, m, deterministic)
+}
+func (dst *SubDefaults) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SubDefaults.Merge(dst, src)
+}
+func (m *SubDefaults) XXX_Size() int {
+	return xxx_messageInfo_SubDefaults.Size(m)
+}
+func (m *SubDefaults) XXX_DiscardUnknown() {
+	xxx_messageInfo_SubDefaults.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SubDefaults proto.InternalMessageInfo
+
+const Default_SubDefaults_N int64 = 7
+
+func (m *SubDefaults) GetN() int64 {
+	if m != nil && m.N != nil {
+		return *m.N
+	}
+	return Default_SubDefaults_N
+}
+
+type RepeatedEnum struct {
+	Color                []RepeatedEnum_Color `protobuf:"varint,1,rep,name=color,enum=test_proto.RepeatedEnum_Color" json:"color,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
+}
+
+func (m *RepeatedEnum) Reset()         { *m = RepeatedEnum{} }
+func (m *RepeatedEnum) String() string { return proto.CompactTextString(m) }
+func (*RepeatedEnum) ProtoMessage()    {}
+func (*RepeatedEnum) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{23}
+}
+func (m *RepeatedEnum) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RepeatedEnum.Unmarshal(m, b)
+}
+func (m *RepeatedEnum) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RepeatedEnum.Marshal(b, m, deterministic)
+}
+func (dst *RepeatedEnum) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RepeatedEnum.Merge(dst, src)
+}
+func (m *RepeatedEnum) XXX_Size() int {
+	return xxx_messageInfo_RepeatedEnum.Size(m)
+}
+func (m *RepeatedEnum) XXX_DiscardUnknown() {
+	xxx_messageInfo_RepeatedEnum.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RepeatedEnum proto.InternalMessageInfo
+
+func (m *RepeatedEnum) GetColor() []RepeatedEnum_Color {
+	if m != nil {
+		return m.Color
+	}
+	return nil
+}
+
+type MoreRepeated struct {
+	Bools                []bool   `protobuf:"varint,1,rep,name=bools" json:"bools,omitempty"`
+	BoolsPacked          []bool   `protobuf:"varint,2,rep,packed,name=bools_packed,json=boolsPacked" json:"bools_packed,omitempty"`
+	Ints                 []int32  `protobuf:"varint,3,rep,name=ints" json:"ints,omitempty"`
+	IntsPacked           []int32  `protobuf:"varint,4,rep,packed,name=ints_packed,json=intsPacked" json:"ints_packed,omitempty"`
+	Int64SPacked         []int64  `protobuf:"varint,7,rep,packed,name=int64s_packed,json=int64sPacked" json:"int64s_packed,omitempty"`
+	Strings              []string `protobuf:"bytes,5,rep,name=strings" json:"strings,omitempty"`
+	Fixeds               []uint32 `protobuf:"fixed32,6,rep,name=fixeds" json:"fixeds,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *MoreRepeated) Reset()         { *m = MoreRepeated{} }
+func (m *MoreRepeated) String() string { return proto.CompactTextString(m) }
+func (*MoreRepeated) ProtoMessage()    {}
+func (*MoreRepeated) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{24}
+}
+func (m *MoreRepeated) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MoreRepeated.Unmarshal(m, b)
+}
+func (m *MoreRepeated) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MoreRepeated.Marshal(b, m, deterministic)
+}
+func (dst *MoreRepeated) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MoreRepeated.Merge(dst, src)
+}
+func (m *MoreRepeated) XXX_Size() int {
+	return xxx_messageInfo_MoreRepeated.Size(m)
+}
+func (m *MoreRepeated) XXX_DiscardUnknown() {
+	xxx_messageInfo_MoreRepeated.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MoreRepeated proto.InternalMessageInfo
+
+func (m *MoreRepeated) GetBools() []bool {
+	if m != nil {
+		return m.Bools
+	}
+	return nil
+}
+
+func (m *MoreRepeated) GetBoolsPacked() []bool {
+	if m != nil {
+		return m.BoolsPacked
+	}
+	return nil
+}
+
+func (m *MoreRepeated) GetInts() []int32 {
+	if m != nil {
+		return m.Ints
+	}
+	return nil
+}
+
+func (m *MoreRepeated) GetIntsPacked() []int32 {
+	if m != nil {
+		return m.IntsPacked
+	}
+	return nil
+}
+
+func (m *MoreRepeated) GetInt64SPacked() []int64 {
+	if m != nil {
+		return m.Int64SPacked
+	}
+	return nil
+}
+
+func (m *MoreRepeated) GetStrings() []string {
+	if m != nil {
+		return m.Strings
+	}
+	return nil
+}
+
+func (m *MoreRepeated) GetFixeds() []uint32 {
+	if m != nil {
+		return m.Fixeds
+	}
+	return nil
+}
+
+type GroupOld struct {
+	G                    *GroupOld_G `protobuf:"group,101,opt,name=G,json=g" json:"g,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
+}
+
+func (m *GroupOld) Reset()         { *m = GroupOld{} }
+func (m *GroupOld) String() string { return proto.CompactTextString(m) }
+func (*GroupOld) ProtoMessage()    {}
+func (*GroupOld) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{25}
+}
+func (m *GroupOld) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GroupOld.Unmarshal(m, b)
+}
+func (m *GroupOld) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GroupOld.Marshal(b, m, deterministic)
+}
+func (dst *GroupOld) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GroupOld.Merge(dst, src)
+}
+func (m *GroupOld) XXX_Size() int {
+	return xxx_messageInfo_GroupOld.Size(m)
+}
+func (m *GroupOld) XXX_DiscardUnknown() {
+	xxx_messageInfo_GroupOld.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GroupOld proto.InternalMessageInfo
+
+func (m *GroupOld) GetG() *GroupOld_G {
+	if m != nil {
+		return m.G
+	}
+	return nil
+}
+
+type GroupOld_G struct {
+	X                    *int32   `protobuf:"varint,2,opt,name=x" json:"x,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GroupOld_G) Reset()         { *m = GroupOld_G{} }
+func (m *GroupOld_G) String() string { return proto.CompactTextString(m) }
+func (*GroupOld_G) ProtoMessage()    {}
+func (*GroupOld_G) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{25, 0}
+}
+func (m *GroupOld_G) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GroupOld_G.Unmarshal(m, b)
+}
+func (m *GroupOld_G) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GroupOld_G.Marshal(b, m, deterministic)
+}
+func (dst *GroupOld_G) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GroupOld_G.Merge(dst, src)
+}
+func (m *GroupOld_G) XXX_Size() int {
+	return xxx_messageInfo_GroupOld_G.Size(m)
+}
+func (m *GroupOld_G) XXX_DiscardUnknown() {
+	xxx_messageInfo_GroupOld_G.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GroupOld_G proto.InternalMessageInfo
+
+func (m *GroupOld_G) GetX() int32 {
+	if m != nil && m.X != nil {
+		return *m.X
+	}
+	return 0
+}
+
+type GroupNew struct {
+	G                    *GroupNew_G `protobuf:"group,101,opt,name=G,json=g" json:"g,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
+}
+
+func (m *GroupNew) Reset()         { *m = GroupNew{} }
+func (m *GroupNew) String() string { return proto.CompactTextString(m) }
+func (*GroupNew) ProtoMessage()    {}
+func (*GroupNew) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{26}
+}
+func (m *GroupNew) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GroupNew.Unmarshal(m, b)
+}
+func (m *GroupNew) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GroupNew.Marshal(b, m, deterministic)
+}
+func (dst *GroupNew) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GroupNew.Merge(dst, src)
+}
+func (m *GroupNew) XXX_Size() int {
+	return xxx_messageInfo_GroupNew.Size(m)
+}
+func (m *GroupNew) XXX_DiscardUnknown() {
+	xxx_messageInfo_GroupNew.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GroupNew proto.InternalMessageInfo
+
+func (m *GroupNew) GetG() *GroupNew_G {
+	if m != nil {
+		return m.G
+	}
+	return nil
+}
+
+type GroupNew_G struct {
+	X                    *int32   `protobuf:"varint,2,opt,name=x" json:"x,omitempty"`
+	Y                    *int32   `protobuf:"varint,3,opt,name=y" json:"y,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GroupNew_G) Reset()         { *m = GroupNew_G{} }
+func (m *GroupNew_G) String() string { return proto.CompactTextString(m) }
+func (*GroupNew_G) ProtoMessage()    {}
+func (*GroupNew_G) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{26, 0}
+}
+func (m *GroupNew_G) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GroupNew_G.Unmarshal(m, b)
+}
+func (m *GroupNew_G) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GroupNew_G.Marshal(b, m, deterministic)
+}
+func (dst *GroupNew_G) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GroupNew_G.Merge(dst, src)
+}
+func (m *GroupNew_G) XXX_Size() int {
+	return xxx_messageInfo_GroupNew_G.Size(m)
+}
+func (m *GroupNew_G) XXX_DiscardUnknown() {
+	xxx_messageInfo_GroupNew_G.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GroupNew_G proto.InternalMessageInfo
+
+func (m *GroupNew_G) GetX() int32 {
+	if m != nil && m.X != nil {
+		return *m.X
+	}
+	return 0
+}
+
+func (m *GroupNew_G) GetY() int32 {
+	if m != nil && m.Y != nil {
+		return *m.Y
+	}
+	return 0
+}
+
+type FloatingPoint struct {
+	F                    *float64 `protobuf:"fixed64,1,req,name=f" json:"f,omitempty"`
+	Exact                *bool    `protobuf:"varint,2,opt,name=exact" json:"exact,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *FloatingPoint) Reset()         { *m = FloatingPoint{} }
+func (m *FloatingPoint) String() string { return proto.CompactTextString(m) }
+func (*FloatingPoint) ProtoMessage()    {}
+func (*FloatingPoint) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{27}
+}
+func (m *FloatingPoint) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FloatingPoint.Unmarshal(m, b)
+}
+func (m *FloatingPoint) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FloatingPoint.Marshal(b, m, deterministic)
+}
+func (dst *FloatingPoint) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FloatingPoint.Merge(dst, src)
+}
+func (m *FloatingPoint) XXX_Size() int {
+	return xxx_messageInfo_FloatingPoint.Size(m)
+}
+func (m *FloatingPoint) XXX_DiscardUnknown() {
+	xxx_messageInfo_FloatingPoint.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FloatingPoint proto.InternalMessageInfo
+
+func (m *FloatingPoint) GetF() float64 {
+	if m != nil && m.F != nil {
+		return *m.F
+	}
+	return 0
+}
+
+func (m *FloatingPoint) GetExact() bool {
+	if m != nil && m.Exact != nil {
+		return *m.Exact
+	}
+	return false
+}
+
+type MessageWithMap struct {
+	NameMapping          map[int32]string         `protobuf:"bytes,1,rep,name=name_mapping,json=nameMapping" json:"name_mapping,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	MsgMapping           map[int64]*FloatingPoint `protobuf:"bytes,2,rep,name=msg_mapping,json=msgMapping" json:"msg_mapping,omitempty" protobuf_key:"zigzag64,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	ByteMapping          map[bool][]byte          `protobuf:"bytes,3,rep,name=byte_mapping,json=byteMapping" json:"byte_mapping,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	StrToStr             map[string]string        `protobuf:"bytes,4,rep,name=str_to_str,json=strToStr" json:"str_to_str,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}                 `json:"-"`
+	XXX_unrecognized     []byte                   `json:"-"`
+	XXX_sizecache        int32                    `json:"-"`
+}
+
+func (m *MessageWithMap) Reset()         { *m = MessageWithMap{} }
+func (m *MessageWithMap) String() string { return proto.CompactTextString(m) }
+func (*MessageWithMap) ProtoMessage()    {}
+func (*MessageWithMap) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{28}
+}
+func (m *MessageWithMap) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MessageWithMap.Unmarshal(m, b)
+}
+func (m *MessageWithMap) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MessageWithMap.Marshal(b, m, deterministic)
+}
+func (dst *MessageWithMap) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MessageWithMap.Merge(dst, src)
+}
+func (m *MessageWithMap) XXX_Size() int {
+	return xxx_messageInfo_MessageWithMap.Size(m)
+}
+func (m *MessageWithMap) XXX_DiscardUnknown() {
+	xxx_messageInfo_MessageWithMap.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MessageWithMap proto.InternalMessageInfo
+
+func (m *MessageWithMap) GetNameMapping() map[int32]string {
+	if m != nil {
+		return m.NameMapping
+	}
+	return nil
+}
+
+func (m *MessageWithMap) GetMsgMapping() map[int64]*FloatingPoint {
+	if m != nil {
+		return m.MsgMapping
+	}
+	return nil
+}
+
+func (m *MessageWithMap) GetByteMapping() map[bool][]byte {
+	if m != nil {
+		return m.ByteMapping
+	}
+	return nil
+}
+
+func (m *MessageWithMap) GetStrToStr() map[string]string {
+	if m != nil {
+		return m.StrToStr
+	}
+	return nil
+}
+
+type Oneof struct {
+	// Types that are valid to be assigned to Union:
+	//	*Oneof_F_Bool
+	//	*Oneof_F_Int32
+	//	*Oneof_F_Int64
+	//	*Oneof_F_Fixed32
+	//	*Oneof_F_Fixed64
+	//	*Oneof_F_Uint32
+	//	*Oneof_F_Uint64
+	//	*Oneof_F_Float
+	//	*Oneof_F_Double
+	//	*Oneof_F_String
+	//	*Oneof_F_Bytes
+	//	*Oneof_F_Sint32
+	//	*Oneof_F_Sint64
+	//	*Oneof_F_Enum
+	//	*Oneof_F_Message
+	//	*Oneof_FGroup
+	//	*Oneof_F_Largest_Tag
+	Union isOneof_Union `protobuf_oneof:"union"`
+	// Types that are valid to be assigned to Tormato:
+	//	*Oneof_Value
+	Tormato              isOneof_Tormato `protobuf_oneof:"tormato"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
+}
+
+func (m *Oneof) Reset()         { *m = Oneof{} }
+func (m *Oneof) String() string { return proto.CompactTextString(m) }
+func (*Oneof) ProtoMessage()    {}
+func (*Oneof) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{29}
+}
+func (m *Oneof) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Oneof.Unmarshal(m, b)
+}
+func (m *Oneof) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Oneof.Marshal(b, m, deterministic)
+}
+func (dst *Oneof) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Oneof.Merge(dst, src)
+}
+func (m *Oneof) XXX_Size() int {
+	return xxx_messageInfo_Oneof.Size(m)
+}
+func (m *Oneof) XXX_DiscardUnknown() {
+	xxx_messageInfo_Oneof.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Oneof proto.InternalMessageInfo
+
+type isOneof_Union interface {
+	isOneof_Union()
+}
+type isOneof_Tormato interface {
+	isOneof_Tormato()
+}
+
+type Oneof_F_Bool struct {
+	F_Bool bool `protobuf:"varint,1,opt,name=F_Bool,json=FBool,oneof"`
+}
+type Oneof_F_Int32 struct {
+	F_Int32 int32 `protobuf:"varint,2,opt,name=F_Int32,json=FInt32,oneof"`
+}
+type Oneof_F_Int64 struct {
+	F_Int64 int64 `protobuf:"varint,3,opt,name=F_Int64,json=FInt64,oneof"`
+}
+type Oneof_F_Fixed32 struct {
+	F_Fixed32 uint32 `protobuf:"fixed32,4,opt,name=F_Fixed32,json=FFixed32,oneof"`
+}
+type Oneof_F_Fixed64 struct {
+	F_Fixed64 uint64 `protobuf:"fixed64,5,opt,name=F_Fixed64,json=FFixed64,oneof"`
+}
+type Oneof_F_Uint32 struct {
+	F_Uint32 uint32 `protobuf:"varint,6,opt,name=F_Uint32,json=FUint32,oneof"`
+}
+type Oneof_F_Uint64 struct {
+	F_Uint64 uint64 `protobuf:"varint,7,opt,name=F_Uint64,json=FUint64,oneof"`
+}
+type Oneof_F_Float struct {
+	F_Float float32 `protobuf:"fixed32,8,opt,name=F_Float,json=FFloat,oneof"`
+}
+type Oneof_F_Double struct {
+	F_Double float64 `protobuf:"fixed64,9,opt,name=F_Double,json=FDouble,oneof"`
+}
+type Oneof_F_String struct {
+	F_String string `protobuf:"bytes,10,opt,name=F_String,json=FString,oneof"`
+}
+type Oneof_F_Bytes struct {
+	F_Bytes []byte `protobuf:"bytes,11,opt,name=F_Bytes,json=FBytes,oneof"`
+}
+type Oneof_F_Sint32 struct {
+	F_Sint32 int32 `protobuf:"zigzag32,12,opt,name=F_Sint32,json=FSint32,oneof"`
+}
+type Oneof_F_Sint64 struct {
+	F_Sint64 int64 `protobuf:"zigzag64,13,opt,name=F_Sint64,json=FSint64,oneof"`
+}
+type Oneof_F_Enum struct {
+	F_Enum MyMessage_Color `protobuf:"varint,14,opt,name=F_Enum,json=FEnum,enum=test_proto.MyMessage_Color,oneof"`
+}
+type Oneof_F_Message struct {
+	F_Message *GoTestField `protobuf:"bytes,15,opt,name=F_Message,json=FMessage,oneof"`
+}
+type Oneof_FGroup struct {
+	FGroup *Oneof_F_Group `protobuf:"group,16,opt,name=F_Group,json=fGroup,oneof"`
+}
+type Oneof_F_Largest_Tag struct {
+	F_Largest_Tag int32 `protobuf:"varint,536870911,opt,name=F_Largest_Tag,json=FLargestTag,oneof"`
+}
+type Oneof_Value struct {
+	Value int32 `protobuf:"varint,100,opt,name=value,oneof"`
+}
+
+func (*Oneof_F_Bool) isOneof_Union()        {}
+func (*Oneof_F_Int32) isOneof_Union()       {}
+func (*Oneof_F_Int64) isOneof_Union()       {}
+func (*Oneof_F_Fixed32) isOneof_Union()     {}
+func (*Oneof_F_Fixed64) isOneof_Union()     {}
+func (*Oneof_F_Uint32) isOneof_Union()      {}
+func (*Oneof_F_Uint64) isOneof_Union()      {}
+func (*Oneof_F_Float) isOneof_Union()       {}
+func (*Oneof_F_Double) isOneof_Union()      {}
+func (*Oneof_F_String) isOneof_Union()      {}
+func (*Oneof_F_Bytes) isOneof_Union()       {}
+func (*Oneof_F_Sint32) isOneof_Union()      {}
+func (*Oneof_F_Sint64) isOneof_Union()      {}
+func (*Oneof_F_Enum) isOneof_Union()        {}
+func (*Oneof_F_Message) isOneof_Union()     {}
+func (*Oneof_FGroup) isOneof_Union()        {}
+func (*Oneof_F_Largest_Tag) isOneof_Union() {}
+func (*Oneof_Value) isOneof_Tormato()       {}
+
+func (m *Oneof) GetUnion() isOneof_Union {
+	if m != nil {
+		return m.Union
+	}
+	return nil
+}
+func (m *Oneof) GetTormato() isOneof_Tormato {
+	if m != nil {
+		return m.Tormato
+	}
+	return nil
+}
+
+func (m *Oneof) GetF_Bool() bool {
+	if x, ok := m.GetUnion().(*Oneof_F_Bool); ok {
+		return x.F_Bool
+	}
+	return false
+}
+
+func (m *Oneof) GetF_Int32() int32 {
+	if x, ok := m.GetUnion().(*Oneof_F_Int32); ok {
+		return x.F_Int32
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Int64() int64 {
+	if x, ok := m.GetUnion().(*Oneof_F_Int64); ok {
+		return x.F_Int64
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Fixed32() uint32 {
+	if x, ok := m.GetUnion().(*Oneof_F_Fixed32); ok {
+		return x.F_Fixed32
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Fixed64() uint64 {
+	if x, ok := m.GetUnion().(*Oneof_F_Fixed64); ok {
+		return x.F_Fixed64
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Uint32() uint32 {
+	if x, ok := m.GetUnion().(*Oneof_F_Uint32); ok {
+		return x.F_Uint32
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Uint64() uint64 {
+	if x, ok := m.GetUnion().(*Oneof_F_Uint64); ok {
+		return x.F_Uint64
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Float() float32 {
+	if x, ok := m.GetUnion().(*Oneof_F_Float); ok {
+		return x.F_Float
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Double() float64 {
+	if x, ok := m.GetUnion().(*Oneof_F_Double); ok {
+		return x.F_Double
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_String() string {
+	if x, ok := m.GetUnion().(*Oneof_F_String); ok {
+		return x.F_String
+	}
+	return ""
+}
+
+func (m *Oneof) GetF_Bytes() []byte {
+	if x, ok := m.GetUnion().(*Oneof_F_Bytes); ok {
+		return x.F_Bytes
+	}
+	return nil
+}
+
+func (m *Oneof) GetF_Sint32() int32 {
+	if x, ok := m.GetUnion().(*Oneof_F_Sint32); ok {
+		return x.F_Sint32
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Sint64() int64 {
+	if x, ok := m.GetUnion().(*Oneof_F_Sint64); ok {
+		return x.F_Sint64
+	}
+	return 0
+}
+
+func (m *Oneof) GetF_Enum() MyMessage_Color {
+	if x, ok := m.GetUnion().(*Oneof_F_Enum); ok {
+		return x.F_Enum
+	}
+	return MyMessage_RED
+}
+
+func (m *Oneof) GetF_Message() *GoTestField {
+	if x, ok := m.GetUnion().(*Oneof_F_Message); ok {
+		return x.F_Message
+	}
+	return nil
+}
+
+func (m *Oneof) GetFGroup() *Oneof_F_Group {
+	if x, ok := m.GetUnion().(*Oneof_FGroup); ok {
+		return x.FGroup
+	}
+	return nil
+}
+
+func (m *Oneof) GetF_Largest_Tag() int32 {
+	if x, ok := m.GetUnion().(*Oneof_F_Largest_Tag); ok {
+		return x.F_Largest_Tag
+	}
+	return 0
+}
+
+func (m *Oneof) GetValue() int32 {
+	if x, ok := m.GetTormato().(*Oneof_Value); ok {
+		return x.Value
+	}
+	return 0
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*Oneof) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _Oneof_OneofMarshaler, _Oneof_OneofUnmarshaler, _Oneof_OneofSizer, []interface{}{
+		(*Oneof_F_Bool)(nil),
+		(*Oneof_F_Int32)(nil),
+		(*Oneof_F_Int64)(nil),
+		(*Oneof_F_Fixed32)(nil),
+		(*Oneof_F_Fixed64)(nil),
+		(*Oneof_F_Uint32)(nil),
+		(*Oneof_F_Uint64)(nil),
+		(*Oneof_F_Float)(nil),
+		(*Oneof_F_Double)(nil),
+		(*Oneof_F_String)(nil),
+		(*Oneof_F_Bytes)(nil),
+		(*Oneof_F_Sint32)(nil),
+		(*Oneof_F_Sint64)(nil),
+		(*Oneof_F_Enum)(nil),
+		(*Oneof_F_Message)(nil),
+		(*Oneof_FGroup)(nil),
+		(*Oneof_F_Largest_Tag)(nil),
+		(*Oneof_Value)(nil),
+	}
+}
+
+func _Oneof_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*Oneof)
+	// union
+	switch x := m.Union.(type) {
+	case *Oneof_F_Bool:
+		t := uint64(0)
+		if x.F_Bool {
+			t = 1
+		}
+		b.EncodeVarint(1<<3 | proto.WireVarint)
+		b.EncodeVarint(t)
+	case *Oneof_F_Int32:
+		b.EncodeVarint(2<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.F_Int32))
+	case *Oneof_F_Int64:
+		b.EncodeVarint(3<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.F_Int64))
+	case *Oneof_F_Fixed32:
+		b.EncodeVarint(4<<3 | proto.WireFixed32)
+		b.EncodeFixed32(uint64(x.F_Fixed32))
+	case *Oneof_F_Fixed64:
+		b.EncodeVarint(5<<3 | proto.WireFixed64)
+		b.EncodeFixed64(uint64(x.F_Fixed64))
+	case *Oneof_F_Uint32:
+		b.EncodeVarint(6<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.F_Uint32))
+	case *Oneof_F_Uint64:
+		b.EncodeVarint(7<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.F_Uint64))
+	case *Oneof_F_Float:
+		b.EncodeVarint(8<<3 | proto.WireFixed32)
+		b.EncodeFixed32(uint64(math.Float32bits(x.F_Float)))
+	case *Oneof_F_Double:
+		b.EncodeVarint(9<<3 | proto.WireFixed64)
+		b.EncodeFixed64(math.Float64bits(x.F_Double))
+	case *Oneof_F_String:
+		b.EncodeVarint(10<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.F_String)
+	case *Oneof_F_Bytes:
+		b.EncodeVarint(11<<3 | proto.WireBytes)
+		b.EncodeRawBytes(x.F_Bytes)
+	case *Oneof_F_Sint32:
+		b.EncodeVarint(12<<3 | proto.WireVarint)
+		b.EncodeZigzag32(uint64(x.F_Sint32))
+	case *Oneof_F_Sint64:
+		b.EncodeVarint(13<<3 | proto.WireVarint)
+		b.EncodeZigzag64(uint64(x.F_Sint64))
+	case *Oneof_F_Enum:
+		b.EncodeVarint(14<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.F_Enum))
+	case *Oneof_F_Message:
+		b.EncodeVarint(15<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.F_Message); err != nil {
+			return err
+		}
+	case *Oneof_FGroup:
+		b.EncodeVarint(16<<3 | proto.WireStartGroup)
+		if err := b.Marshal(x.FGroup); err != nil {
+			return err
+		}
+		b.EncodeVarint(16<<3 | proto.WireEndGroup)
+	case *Oneof_F_Largest_Tag:
+		b.EncodeVarint(536870911<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.F_Largest_Tag))
+	case nil:
+	default:
+		return fmt.Errorf("Oneof.Union has unexpected type %T", x)
+	}
+	// tormato
+	switch x := m.Tormato.(type) {
+	case *Oneof_Value:
+		b.EncodeVarint(100<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.Value))
+	case nil:
+	default:
+		return fmt.Errorf("Oneof.Tormato has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _Oneof_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*Oneof)
+	switch tag {
+	case 1: // union.F_Bool
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Oneof_F_Bool{x != 0}
+		return true, err
+	case 2: // union.F_Int32
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Oneof_F_Int32{int32(x)}
+		return true, err
+	case 3: // union.F_Int64
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Oneof_F_Int64{int64(x)}
+		return true, err
+	case 4: // union.F_Fixed32
+		if wire != proto.WireFixed32 {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeFixed32()
+		m.Union = &Oneof_F_Fixed32{uint32(x)}
+		return true, err
+	case 5: // union.F_Fixed64
+		if wire != proto.WireFixed64 {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeFixed64()
+		m.Union = &Oneof_F_Fixed64{x}
+		return true, err
+	case 6: // union.F_Uint32
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Oneof_F_Uint32{uint32(x)}
+		return true, err
+	case 7: // union.F_Uint64
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Oneof_F_Uint64{x}
+		return true, err
+	case 8: // union.F_Float
+		if wire != proto.WireFixed32 {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeFixed32()
+		m.Union = &Oneof_F_Float{math.Float32frombits(uint32(x))}
+		return true, err
+	case 9: // union.F_Double
+		if wire != proto.WireFixed64 {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeFixed64()
+		m.Union = &Oneof_F_Double{math.Float64frombits(x)}
+		return true, err
+	case 10: // union.F_String
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Union = &Oneof_F_String{x}
+		return true, err
+	case 11: // union.F_Bytes
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeRawBytes(true)
+		m.Union = &Oneof_F_Bytes{x}
+		return true, err
+	case 12: // union.F_Sint32
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeZigzag32()
+		m.Union = &Oneof_F_Sint32{int32(x)}
+		return true, err
+	case 13: // union.F_Sint64
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeZigzag64()
+		m.Union = &Oneof_F_Sint64{int64(x)}
+		return true, err
+	case 14: // union.F_Enum
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Oneof_F_Enum{MyMessage_Color(x)}
+		return true, err
+	case 15: // union.F_Message
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(GoTestField)
+		err := b.DecodeMessage(msg)
+		m.Union = &Oneof_F_Message{msg}
+		return true, err
+	case 16: // union.f_group
+		if wire != proto.WireStartGroup {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(Oneof_F_Group)
+		err := b.DecodeGroup(msg)
+		m.Union = &Oneof_FGroup{msg}
+		return true, err
+	case 536870911: // union.F_Largest_Tag
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Oneof_F_Largest_Tag{int32(x)}
+		return true, err
+	case 100: // tormato.value
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Tormato = &Oneof_Value{int32(x)}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _Oneof_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*Oneof)
+	// union
+	switch x := m.Union.(type) {
+	case *Oneof_F_Bool:
+		n += 1 // tag and wire
+		n += 1
+	case *Oneof_F_Int32:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(x.F_Int32))
+	case *Oneof_F_Int64:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(x.F_Int64))
+	case *Oneof_F_Fixed32:
+		n += 1 // tag and wire
+		n += 4
+	case *Oneof_F_Fixed64:
+		n += 1 // tag and wire
+		n += 8
+	case *Oneof_F_Uint32:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(x.F_Uint32))
+	case *Oneof_F_Uint64:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(x.F_Uint64))
+	case *Oneof_F_Float:
+		n += 1 // tag and wire
+		n += 4
+	case *Oneof_F_Double:
+		n += 1 // tag and wire
+		n += 8
+	case *Oneof_F_String:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.F_String)))
+		n += len(x.F_String)
+	case *Oneof_F_Bytes:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.F_Bytes)))
+		n += len(x.F_Bytes)
+	case *Oneof_F_Sint32:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64((uint32(x.F_Sint32) << 1) ^ uint32((int32(x.F_Sint32) >> 31))))
+	case *Oneof_F_Sint64:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(uint64(x.F_Sint64<<1) ^ uint64((int64(x.F_Sint64) >> 63))))
+	case *Oneof_F_Enum:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(x.F_Enum))
+	case *Oneof_F_Message:
+		s := proto.Size(x.F_Message)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *Oneof_FGroup:
+		n += 2 // tag and wire
+		n += proto.Size(x.FGroup)
+		n += 2 // tag and wire
+	case *Oneof_F_Largest_Tag:
+		n += 10 // tag and wire
+		n += proto.SizeVarint(uint64(x.F_Largest_Tag))
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	// tormato
+	switch x := m.Tormato.(type) {
+	case *Oneof_Value:
+		n += 2 // tag and wire
+		n += proto.SizeVarint(uint64(x.Value))
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+type Oneof_F_Group struct {
+	X                    *int32   `protobuf:"varint,17,opt,name=x" json:"x,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Oneof_F_Group) Reset()         { *m = Oneof_F_Group{} }
+func (m *Oneof_F_Group) String() string { return proto.CompactTextString(m) }
+func (*Oneof_F_Group) ProtoMessage()    {}
+func (*Oneof_F_Group) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{29, 0}
+}
+func (m *Oneof_F_Group) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Oneof_F_Group.Unmarshal(m, b)
+}
+func (m *Oneof_F_Group) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Oneof_F_Group.Marshal(b, m, deterministic)
+}
+func (dst *Oneof_F_Group) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Oneof_F_Group.Merge(dst, src)
+}
+func (m *Oneof_F_Group) XXX_Size() int {
+	return xxx_messageInfo_Oneof_F_Group.Size(m)
+}
+func (m *Oneof_F_Group) XXX_DiscardUnknown() {
+	xxx_messageInfo_Oneof_F_Group.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Oneof_F_Group proto.InternalMessageInfo
+
+func (m *Oneof_F_Group) GetX() int32 {
+	if m != nil && m.X != nil {
+		return *m.X
+	}
+	return 0
+}
+
+type Communique struct {
+	MakeMeCry *bool `protobuf:"varint,1,opt,name=make_me_cry,json=makeMeCry" json:"make_me_cry,omitempty"`
+	// This is a oneof, called "union".
+	//
+	// Types that are valid to be assigned to Union:
+	//	*Communique_Number
+	//	*Communique_Name
+	//	*Communique_Data
+	//	*Communique_TempC
+	//	*Communique_Col
+	//	*Communique_Msg
+	Union                isCommunique_Union `protobuf_oneof:"union"`
+	XXX_NoUnkeyedLiteral struct{}           `json:"-"`
+	XXX_unrecognized     []byte             `json:"-"`
+	XXX_sizecache        int32              `json:"-"`
+}
+
+func (m *Communique) Reset()         { *m = Communique{} }
+func (m *Communique) String() string { return proto.CompactTextString(m) }
+func (*Communique) ProtoMessage()    {}
+func (*Communique) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_74787bfc6550f8a7, []int{30}
+}
+func (m *Communique) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Communique.Unmarshal(m, b)
+}
+func (m *Communique) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Communique.Marshal(b, m, deterministic)
+}
+func (dst *Communique) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Communique.Merge(dst, src)
+}
+func (m *Communique) XXX_Size() int {
+	return xxx_messageInfo_Communique.Size(m)
+}
+func (m *Communique) XXX_DiscardUnknown() {
+	xxx_messageInfo_Communique.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Communique proto.InternalMessageInfo
+
+type isCommunique_Union interface {
+	isCommunique_Union()
+}
+
+type Communique_Number struct {
+	Number int32 `protobuf:"varint,5,opt,name=number,oneof"`
+}
+type Communique_Name struct {
+	Name string `protobuf:"bytes,6,opt,name=name,oneof"`
+}
+type Communique_Data struct {
+	Data []byte `protobuf:"bytes,7,opt,name=data,oneof"`
+}
+type Communique_TempC struct {
+	TempC float64 `protobuf:"fixed64,8,opt,name=temp_c,json=tempC,oneof"`
+}
+type Communique_Col struct {
+	Col MyMessage_Color `protobuf:"varint,9,opt,name=col,enum=test_proto.MyMessage_Color,oneof"`
+}
+type Communique_Msg struct {
+	Msg *Strings `protobuf:"bytes,10,opt,name=msg,oneof"`
+}
+
+func (*Communique_Number) isCommunique_Union() {}
+func (*Communique_Name) isCommunique_Union()   {}
+func (*Communique_Data) isCommunique_Union()   {}
+func (*Communique_TempC) isCommunique_Union()  {}
+func (*Communique_Col) isCommunique_Union()    {}
+func (*Communique_Msg) isCommunique_Union()    {}
+
+func (m *Communique) GetUnion() isCommunique_Union {
+	if m != nil {
+		return m.Union
+	}
+	return nil
+}
+
+func (m *Communique) GetMakeMeCry() bool {
+	if m != nil && m.MakeMeCry != nil {
+		return *m.MakeMeCry
+	}
+	return false
+}
+
+func (m *Communique) GetNumber() int32 {
+	if x, ok := m.GetUnion().(*Communique_Number); ok {
+		return x.Number
+	}
+	return 0
+}
+
+func (m *Communique) GetName() string {
+	if x, ok := m.GetUnion().(*Communique_Name); ok {
+		return x.Name
+	}
+	return ""
+}
+
+func (m *Communique) GetData() []byte {
+	if x, ok := m.GetUnion().(*Communique_Data); ok {
+		return x.Data
+	}
+	return nil
+}
+
+func (m *Communique) GetTempC() float64 {
+	if x, ok := m.GetUnion().(*Communique_TempC); ok {
+		return x.TempC
+	}
+	return 0
+}
+
+func (m *Communique) GetCol() MyMessage_Color {
+	if x, ok := m.GetUnion().(*Communique_Col); ok {
+		return x.Col
+	}
+	return MyMessage_RED
+}
+
+func (m *Communique) GetMsg() *Strings {
+	if x, ok := m.GetUnion().(*Communique_Msg); ok {
+		return x.Msg
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*Communique) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _Communique_OneofMarshaler, _Communique_OneofUnmarshaler, _Communique_OneofSizer, []interface{}{
+		(*Communique_Number)(nil),
+		(*Communique_Name)(nil),
+		(*Communique_Data)(nil),
+		(*Communique_TempC)(nil),
+		(*Communique_Col)(nil),
+		(*Communique_Msg)(nil),
+	}
+}
+
+func _Communique_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*Communique)
+	// union
+	switch x := m.Union.(type) {
+	case *Communique_Number:
+		b.EncodeVarint(5<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.Number))
+	case *Communique_Name:
+		b.EncodeVarint(6<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.Name)
+	case *Communique_Data:
+		b.EncodeVarint(7<<3 | proto.WireBytes)
+		b.EncodeRawBytes(x.Data)
+	case *Communique_TempC:
+		b.EncodeVarint(8<<3 | proto.WireFixed64)
+		b.EncodeFixed64(math.Float64bits(x.TempC))
+	case *Communique_Col:
+		b.EncodeVarint(9<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.Col))
+	case *Communique_Msg:
+		b.EncodeVarint(10<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Msg); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("Communique.Union has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _Communique_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*Communique)
+	switch tag {
+	case 5: // union.number
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Communique_Number{int32(x)}
+		return true, err
+	case 6: // union.name
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Union = &Communique_Name{x}
+		return true, err
+	case 7: // union.data
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeRawBytes(true)
+		m.Union = &Communique_Data{x}
+		return true, err
+	case 8: // union.temp_c
+		if wire != proto.WireFixed64 {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeFixed64()
+		m.Union = &Communique_TempC{math.Float64frombits(x)}
+		return true, err
+	case 9: // union.col
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Union = &Communique_Col{MyMessage_Color(x)}
+		return true, err
+	case 10: // union.msg
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(Strings)
+		err := b.DecodeMessage(msg)
+		m.Union = &Communique_Msg{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _Communique_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*Communique)
+	// union
+	switch x := m.Union.(type) {
+	case *Communique_Number:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(x.Number))
+	case *Communique_Name:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.Name)))
+		n += len(x.Name)
+	case *Communique_Data:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.Data)))
+		n += len(x.Data)
+	case *Communique_TempC:
+		n += 1 // tag and wire
+		n += 8
+	case *Communique_Col:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(x.Col))
+	case *Communique_Msg:
+		s := proto.Size(x.Msg)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+var E_Greeting = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessage)(nil),
+	ExtensionType: ([]string)(nil),
+	Field:         106,
+	Name:          "test_proto.greeting",
+	Tag:           "bytes,106,rep,name=greeting",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_Complex = &proto.ExtensionDesc{
+	ExtendedType:  (*OtherMessage)(nil),
+	ExtensionType: (*ComplexExtension)(nil),
+	Field:         200,
+	Name:          "test_proto.complex",
+	Tag:           "bytes,200,opt,name=complex",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_RComplex = &proto.ExtensionDesc{
+	ExtendedType:  (*OtherMessage)(nil),
+	ExtensionType: ([]*ComplexExtension)(nil),
+	Field:         201,
+	Name:          "test_proto.r_complex",
+	Tag:           "bytes,201,rep,name=r_complex,json=rComplex",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultDouble = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*float64)(nil),
+	Field:         101,
+	Name:          "test_proto.no_default_double",
+	Tag:           "fixed64,101,opt,name=no_default_double,json=noDefaultDouble",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultFloat = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*float32)(nil),
+	Field:         102,
+	Name:          "test_proto.no_default_float",
+	Tag:           "fixed32,102,opt,name=no_default_float,json=noDefaultFloat",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultInt32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         103,
+	Name:          "test_proto.no_default_int32",
+	Tag:           "varint,103,opt,name=no_default_int32,json=noDefaultInt32",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultInt64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int64)(nil),
+	Field:         104,
+	Name:          "test_proto.no_default_int64",
+	Tag:           "varint,104,opt,name=no_default_int64,json=noDefaultInt64",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultUint32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint32)(nil),
+	Field:         105,
+	Name:          "test_proto.no_default_uint32",
+	Tag:           "varint,105,opt,name=no_default_uint32,json=noDefaultUint32",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultUint64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint64)(nil),
+	Field:         106,
+	Name:          "test_proto.no_default_uint64",
+	Tag:           "varint,106,opt,name=no_default_uint64,json=noDefaultUint64",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultSint32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         107,
+	Name:          "test_proto.no_default_sint32",
+	Tag:           "zigzag32,107,opt,name=no_default_sint32,json=noDefaultSint32",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultSint64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int64)(nil),
+	Field:         108,
+	Name:          "test_proto.no_default_sint64",
+	Tag:           "zigzag64,108,opt,name=no_default_sint64,json=noDefaultSint64",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultFixed32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint32)(nil),
+	Field:         109,
+	Name:          "test_proto.no_default_fixed32",
+	Tag:           "fixed32,109,opt,name=no_default_fixed32,json=noDefaultFixed32",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultFixed64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint64)(nil),
+	Field:         110,
+	Name:          "test_proto.no_default_fixed64",
+	Tag:           "fixed64,110,opt,name=no_default_fixed64,json=noDefaultFixed64",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultSfixed32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         111,
+	Name:          "test_proto.no_default_sfixed32",
+	Tag:           "fixed32,111,opt,name=no_default_sfixed32,json=noDefaultSfixed32",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultSfixed64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int64)(nil),
+	Field:         112,
+	Name:          "test_proto.no_default_sfixed64",
+	Tag:           "fixed64,112,opt,name=no_default_sfixed64,json=noDefaultSfixed64",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultBool = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         113,
+	Name:          "test_proto.no_default_bool",
+	Tag:           "varint,113,opt,name=no_default_bool,json=noDefaultBool",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultString = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*string)(nil),
+	Field:         114,
+	Name:          "test_proto.no_default_string",
+	Tag:           "bytes,114,opt,name=no_default_string,json=noDefaultString",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultBytes = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: ([]byte)(nil),
+	Field:         115,
+	Name:          "test_proto.no_default_bytes",
+	Tag:           "bytes,115,opt,name=no_default_bytes,json=noDefaultBytes",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_NoDefaultEnum = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*DefaultsMessage_DefaultsEnum)(nil),
+	Field:         116,
+	Name:          "test_proto.no_default_enum",
+	Tag:           "varint,116,opt,name=no_default_enum,json=noDefaultEnum,enum=test_proto.DefaultsMessage_DefaultsEnum",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultDouble = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*float64)(nil),
+	Field:         201,
+	Name:          "test_proto.default_double",
+	Tag:           "fixed64,201,opt,name=default_double,json=defaultDouble,def=3.1415",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultFloat = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*float32)(nil),
+	Field:         202,
+	Name:          "test_proto.default_float",
+	Tag:           "fixed32,202,opt,name=default_float,json=defaultFloat,def=3.14",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultInt32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         203,
+	Name:          "test_proto.default_int32",
+	Tag:           "varint,203,opt,name=default_int32,json=defaultInt32,def=42",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultInt64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int64)(nil),
+	Field:         204,
+	Name:          "test_proto.default_int64",
+	Tag:           "varint,204,opt,name=default_int64,json=defaultInt64,def=43",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultUint32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint32)(nil),
+	Field:         205,
+	Name:          "test_proto.default_uint32",
+	Tag:           "varint,205,opt,name=default_uint32,json=defaultUint32,def=44",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultUint64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint64)(nil),
+	Field:         206,
+	Name:          "test_proto.default_uint64",
+	Tag:           "varint,206,opt,name=default_uint64,json=defaultUint64,def=45",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultSint32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         207,
+	Name:          "test_proto.default_sint32",
+	Tag:           "zigzag32,207,opt,name=default_sint32,json=defaultSint32,def=46",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultSint64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int64)(nil),
+	Field:         208,
+	Name:          "test_proto.default_sint64",
+	Tag:           "zigzag64,208,opt,name=default_sint64,json=defaultSint64,def=47",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultFixed32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint32)(nil),
+	Field:         209,
+	Name:          "test_proto.default_fixed32",
+	Tag:           "fixed32,209,opt,name=default_fixed32,json=defaultFixed32,def=48",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultFixed64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*uint64)(nil),
+	Field:         210,
+	Name:          "test_proto.default_fixed64",
+	Tag:           "fixed64,210,opt,name=default_fixed64,json=defaultFixed64,def=49",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultSfixed32 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         211,
+	Name:          "test_proto.default_sfixed32",
+	Tag:           "fixed32,211,opt,name=default_sfixed32,json=defaultSfixed32,def=50",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultSfixed64 = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*int64)(nil),
+	Field:         212,
+	Name:          "test_proto.default_sfixed64",
+	Tag:           "fixed64,212,opt,name=default_sfixed64,json=defaultSfixed64,def=51",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultBool = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         213,
+	Name:          "test_proto.default_bool",
+	Tag:           "varint,213,opt,name=default_bool,json=defaultBool,def=1",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultString = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*string)(nil),
+	Field:         214,
+	Name:          "test_proto.default_string",
+	Tag:           "bytes,214,opt,name=default_string,json=defaultString,def=Hello, string,def=foo",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultBytes = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: ([]byte)(nil),
+	Field:         215,
+	Name:          "test_proto.default_bytes",
+	Tag:           "bytes,215,opt,name=default_bytes,json=defaultBytes,def=Hello, bytes",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_DefaultEnum = &proto.ExtensionDesc{
+	ExtendedType:  (*DefaultsMessage)(nil),
+	ExtensionType: (*DefaultsMessage_DefaultsEnum)(nil),
+	Field:         216,
+	Name:          "test_proto.default_enum",
+	Tag:           "varint,216,opt,name=default_enum,json=defaultEnum,enum=test_proto.DefaultsMessage_DefaultsEnum,def=1",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X201 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         201,
+	Name:          "test_proto.x201",
+	Tag:           "bytes,201,opt,name=x201",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X202 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         202,
+	Name:          "test_proto.x202",
+	Tag:           "bytes,202,opt,name=x202",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X203 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         203,
+	Name:          "test_proto.x203",
+	Tag:           "bytes,203,opt,name=x203",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X204 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         204,
+	Name:          "test_proto.x204",
+	Tag:           "bytes,204,opt,name=x204",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X205 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         205,
+	Name:          "test_proto.x205",
+	Tag:           "bytes,205,opt,name=x205",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X206 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         206,
+	Name:          "test_proto.x206",
+	Tag:           "bytes,206,opt,name=x206",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X207 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         207,
+	Name:          "test_proto.x207",
+	Tag:           "bytes,207,opt,name=x207",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X208 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         208,
+	Name:          "test_proto.x208",
+	Tag:           "bytes,208,opt,name=x208",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X209 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         209,
+	Name:          "test_proto.x209",
+	Tag:           "bytes,209,opt,name=x209",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X210 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         210,
+	Name:          "test_proto.x210",
+	Tag:           "bytes,210,opt,name=x210",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X211 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         211,
+	Name:          "test_proto.x211",
+	Tag:           "bytes,211,opt,name=x211",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X212 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         212,
+	Name:          "test_proto.x212",
+	Tag:           "bytes,212,opt,name=x212",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X213 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         213,
+	Name:          "test_proto.x213",
+	Tag:           "bytes,213,opt,name=x213",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X214 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         214,
+	Name:          "test_proto.x214",
+	Tag:           "bytes,214,opt,name=x214",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X215 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         215,
+	Name:          "test_proto.x215",
+	Tag:           "bytes,215,opt,name=x215",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X216 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         216,
+	Name:          "test_proto.x216",
+	Tag:           "bytes,216,opt,name=x216",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X217 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         217,
+	Name:          "test_proto.x217",
+	Tag:           "bytes,217,opt,name=x217",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X218 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         218,
+	Name:          "test_proto.x218",
+	Tag:           "bytes,218,opt,name=x218",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X219 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         219,
+	Name:          "test_proto.x219",
+	Tag:           "bytes,219,opt,name=x219",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X220 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         220,
+	Name:          "test_proto.x220",
+	Tag:           "bytes,220,opt,name=x220",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X221 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         221,
+	Name:          "test_proto.x221",
+	Tag:           "bytes,221,opt,name=x221",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X222 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         222,
+	Name:          "test_proto.x222",
+	Tag:           "bytes,222,opt,name=x222",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X223 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         223,
+	Name:          "test_proto.x223",
+	Tag:           "bytes,223,opt,name=x223",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X224 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         224,
+	Name:          "test_proto.x224",
+	Tag:           "bytes,224,opt,name=x224",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X225 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         225,
+	Name:          "test_proto.x225",
+	Tag:           "bytes,225,opt,name=x225",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X226 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         226,
+	Name:          "test_proto.x226",
+	Tag:           "bytes,226,opt,name=x226",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X227 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         227,
+	Name:          "test_proto.x227",
+	Tag:           "bytes,227,opt,name=x227",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X228 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         228,
+	Name:          "test_proto.x228",
+	Tag:           "bytes,228,opt,name=x228",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X229 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         229,
+	Name:          "test_proto.x229",
+	Tag:           "bytes,229,opt,name=x229",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X230 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         230,
+	Name:          "test_proto.x230",
+	Tag:           "bytes,230,opt,name=x230",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X231 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         231,
+	Name:          "test_proto.x231",
+	Tag:           "bytes,231,opt,name=x231",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X232 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         232,
+	Name:          "test_proto.x232",
+	Tag:           "bytes,232,opt,name=x232",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X233 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         233,
+	Name:          "test_proto.x233",
+	Tag:           "bytes,233,opt,name=x233",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X234 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         234,
+	Name:          "test_proto.x234",
+	Tag:           "bytes,234,opt,name=x234",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X235 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         235,
+	Name:          "test_proto.x235",
+	Tag:           "bytes,235,opt,name=x235",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X236 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         236,
+	Name:          "test_proto.x236",
+	Tag:           "bytes,236,opt,name=x236",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X237 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         237,
+	Name:          "test_proto.x237",
+	Tag:           "bytes,237,opt,name=x237",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X238 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         238,
+	Name:          "test_proto.x238",
+	Tag:           "bytes,238,opt,name=x238",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X239 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         239,
+	Name:          "test_proto.x239",
+	Tag:           "bytes,239,opt,name=x239",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X240 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         240,
+	Name:          "test_proto.x240",
+	Tag:           "bytes,240,opt,name=x240",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X241 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         241,
+	Name:          "test_proto.x241",
+	Tag:           "bytes,241,opt,name=x241",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X242 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         242,
+	Name:          "test_proto.x242",
+	Tag:           "bytes,242,opt,name=x242",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X243 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         243,
+	Name:          "test_proto.x243",
+	Tag:           "bytes,243,opt,name=x243",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X244 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         244,
+	Name:          "test_proto.x244",
+	Tag:           "bytes,244,opt,name=x244",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X245 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         245,
+	Name:          "test_proto.x245",
+	Tag:           "bytes,245,opt,name=x245",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X246 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         246,
+	Name:          "test_proto.x246",
+	Tag:           "bytes,246,opt,name=x246",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X247 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         247,
+	Name:          "test_proto.x247",
+	Tag:           "bytes,247,opt,name=x247",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X248 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         248,
+	Name:          "test_proto.x248",
+	Tag:           "bytes,248,opt,name=x248",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X249 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         249,
+	Name:          "test_proto.x249",
+	Tag:           "bytes,249,opt,name=x249",
+	Filename:      "test_proto/test.proto",
+}
+
+var E_X250 = &proto.ExtensionDesc{
+	ExtendedType:  (*MyMessageSet)(nil),
+	ExtensionType: (*Empty)(nil),
+	Field:         250,
+	Name:          "test_proto.x250",
+	Tag:           "bytes,250,opt,name=x250",
+	Filename:      "test_proto/test.proto",
+}
+
+func init() {
+	proto.RegisterType((*GoEnum)(nil), "test_proto.GoEnum")
+	proto.RegisterType((*GoTestField)(nil), "test_proto.GoTestField")
+	proto.RegisterType((*GoTest)(nil), "test_proto.GoTest")
+	proto.RegisterType((*GoTest_RequiredGroup)(nil), "test_proto.GoTest.RequiredGroup")
+	proto.RegisterType((*GoTest_RepeatedGroup)(nil), "test_proto.GoTest.RepeatedGroup")
+	proto.RegisterType((*GoTest_OptionalGroup)(nil), "test_proto.GoTest.OptionalGroup")
+	proto.RegisterType((*GoTestRequiredGroupField)(nil), "test_proto.GoTestRequiredGroupField")
+	proto.RegisterType((*GoTestRequiredGroupField_Group)(nil), "test_proto.GoTestRequiredGroupField.Group")
+	proto.RegisterType((*GoSkipTest)(nil), "test_proto.GoSkipTest")
+	proto.RegisterType((*GoSkipTest_SkipGroup)(nil), "test_proto.GoSkipTest.SkipGroup")
+	proto.RegisterType((*NonPackedTest)(nil), "test_proto.NonPackedTest")
+	proto.RegisterType((*PackedTest)(nil), "test_proto.PackedTest")
+	proto.RegisterType((*MaxTag)(nil), "test_proto.MaxTag")
+	proto.RegisterType((*OldMessage)(nil), "test_proto.OldMessage")
+	proto.RegisterType((*OldMessage_Nested)(nil), "test_proto.OldMessage.Nested")
+	proto.RegisterType((*NewMessage)(nil), "test_proto.NewMessage")
+	proto.RegisterType((*NewMessage_Nested)(nil), "test_proto.NewMessage.Nested")
+	proto.RegisterType((*InnerMessage)(nil), "test_proto.InnerMessage")
+	proto.RegisterType((*OtherMessage)(nil), "test_proto.OtherMessage")
+	proto.RegisterType((*RequiredInnerMessage)(nil), "test_proto.RequiredInnerMessage")
+	proto.RegisterType((*MyMessage)(nil), "test_proto.MyMessage")
+	proto.RegisterType((*MyMessage_SomeGroup)(nil), "test_proto.MyMessage.SomeGroup")
+	proto.RegisterType((*Ext)(nil), "test_proto.Ext")
+	proto.RegisterMapType((map[int32]int32)(nil), "test_proto.Ext.MapFieldEntry")
+	proto.RegisterType((*ComplexExtension)(nil), "test_proto.ComplexExtension")
+	proto.RegisterType((*DefaultsMessage)(nil), "test_proto.DefaultsMessage")
+	proto.RegisterType((*MyMessageSet)(nil), "test_proto.MyMessageSet")
+	proto.RegisterType((*Empty)(nil), "test_proto.Empty")
+	proto.RegisterType((*MessageList)(nil), "test_proto.MessageList")
+	proto.RegisterType((*MessageList_Message)(nil), "test_proto.MessageList.Message")
+	proto.RegisterType((*Strings)(nil), "test_proto.Strings")
+	proto.RegisterType((*Defaults)(nil), "test_proto.Defaults")
+	proto.RegisterType((*SubDefaults)(nil), "test_proto.SubDefaults")
+	proto.RegisterType((*RepeatedEnum)(nil), "test_proto.RepeatedEnum")
+	proto.RegisterType((*MoreRepeated)(nil), "test_proto.MoreRepeated")
+	proto.RegisterType((*GroupOld)(nil), "test_proto.GroupOld")
+	proto.RegisterType((*GroupOld_G)(nil), "test_proto.GroupOld.G")
+	proto.RegisterType((*GroupNew)(nil), "test_proto.GroupNew")
+	proto.RegisterType((*GroupNew_G)(nil), "test_proto.GroupNew.G")
+	proto.RegisterType((*FloatingPoint)(nil), "test_proto.FloatingPoint")
+	proto.RegisterType((*MessageWithMap)(nil), "test_proto.MessageWithMap")
+	proto.RegisterMapType((map[bool][]byte)(nil), "test_proto.MessageWithMap.ByteMappingEntry")
+	proto.RegisterMapType((map[int64]*FloatingPoint)(nil), "test_proto.MessageWithMap.MsgMappingEntry")
+	proto.RegisterMapType((map[int32]string)(nil), "test_proto.MessageWithMap.NameMappingEntry")
+	proto.RegisterMapType((map[string]string)(nil), "test_proto.MessageWithMap.StrToStrEntry")
+	proto.RegisterType((*Oneof)(nil), "test_proto.Oneof")
+	proto.RegisterType((*Oneof_F_Group)(nil), "test_proto.Oneof.F_Group")
+	proto.RegisterType((*Communique)(nil), "test_proto.Communique")
+	proto.RegisterEnum("test_proto.FOO", FOO_name, FOO_value)
+	proto.RegisterEnum("test_proto.GoTest_KIND", GoTest_KIND_name, GoTest_KIND_value)
+	proto.RegisterEnum("test_proto.MyMessage_Color", MyMessage_Color_name, MyMessage_Color_value)
+	proto.RegisterEnum("test_proto.DefaultsMessage_DefaultsEnum", DefaultsMessage_DefaultsEnum_name, DefaultsMessage_DefaultsEnum_value)
+	proto.RegisterEnum("test_proto.Defaults_Color", Defaults_Color_name, Defaults_Color_value)
+	proto.RegisterEnum("test_proto.RepeatedEnum_Color", RepeatedEnum_Color_name, RepeatedEnum_Color_value)
+	proto.RegisterExtension(E_Ext_More)
+	proto.RegisterExtension(E_Ext_Text)
+	proto.RegisterExtension(E_Ext_Number)
+	proto.RegisterExtension(E_Greeting)
+	proto.RegisterExtension(E_Complex)
+	proto.RegisterExtension(E_RComplex)
+	proto.RegisterExtension(E_NoDefaultDouble)
+	proto.RegisterExtension(E_NoDefaultFloat)
+	proto.RegisterExtension(E_NoDefaultInt32)
+	proto.RegisterExtension(E_NoDefaultInt64)
+	proto.RegisterExtension(E_NoDefaultUint32)
+	proto.RegisterExtension(E_NoDefaultUint64)
+	proto.RegisterExtension(E_NoDefaultSint32)
+	proto.RegisterExtension(E_NoDefaultSint64)
+	proto.RegisterExtension(E_NoDefaultFixed32)
+	proto.RegisterExtension(E_NoDefaultFixed64)
+	proto.RegisterExtension(E_NoDefaultSfixed32)
+	proto.RegisterExtension(E_NoDefaultSfixed64)
+	proto.RegisterExtension(E_NoDefaultBool)
+	proto.RegisterExtension(E_NoDefaultString)
+	proto.RegisterExtension(E_NoDefaultBytes)
+	proto.RegisterExtension(E_NoDefaultEnum)
+	proto.RegisterExtension(E_DefaultDouble)
+	proto.RegisterExtension(E_DefaultFloat)
+	proto.RegisterExtension(E_DefaultInt32)
+	proto.RegisterExtension(E_DefaultInt64)
+	proto.RegisterExtension(E_DefaultUint32)
+	proto.RegisterExtension(E_DefaultUint64)
+	proto.RegisterExtension(E_DefaultSint32)
+	proto.RegisterExtension(E_DefaultSint64)
+	proto.RegisterExtension(E_DefaultFixed32)
+	proto.RegisterExtension(E_DefaultFixed64)
+	proto.RegisterExtension(E_DefaultSfixed32)
+	proto.RegisterExtension(E_DefaultSfixed64)
+	proto.RegisterExtension(E_DefaultBool)
+	proto.RegisterExtension(E_DefaultString)
+	proto.RegisterExtension(E_DefaultBytes)
+	proto.RegisterExtension(E_DefaultEnum)
+	proto.RegisterExtension(E_X201)
+	proto.RegisterExtension(E_X202)
+	proto.RegisterExtension(E_X203)
+	proto.RegisterExtension(E_X204)
+	proto.RegisterExtension(E_X205)
+	proto.RegisterExtension(E_X206)
+	proto.RegisterExtension(E_X207)
+	proto.RegisterExtension(E_X208)
+	proto.RegisterExtension(E_X209)
+	proto.RegisterExtension(E_X210)
+	proto.RegisterExtension(E_X211)
+	proto.RegisterExtension(E_X212)
+	proto.RegisterExtension(E_X213)
+	proto.RegisterExtension(E_X214)
+	proto.RegisterExtension(E_X215)
+	proto.RegisterExtension(E_X216)
+	proto.RegisterExtension(E_X217)
+	proto.RegisterExtension(E_X218)
+	proto.RegisterExtension(E_X219)
+	proto.RegisterExtension(E_X220)
+	proto.RegisterExtension(E_X221)
+	proto.RegisterExtension(E_X222)
+	proto.RegisterExtension(E_X223)
+	proto.RegisterExtension(E_X224)
+	proto.RegisterExtension(E_X225)
+	proto.RegisterExtension(E_X226)
+	proto.RegisterExtension(E_X227)
+	proto.RegisterExtension(E_X228)
+	proto.RegisterExtension(E_X229)
+	proto.RegisterExtension(E_X230)
+	proto.RegisterExtension(E_X231)
+	proto.RegisterExtension(E_X232)
+	proto.RegisterExtension(E_X233)
+	proto.RegisterExtension(E_X234)
+	proto.RegisterExtension(E_X235)
+	proto.RegisterExtension(E_X236)
+	proto.RegisterExtension(E_X237)
+	proto.RegisterExtension(E_X238)
+	proto.RegisterExtension(E_X239)
+	proto.RegisterExtension(E_X240)
+	proto.RegisterExtension(E_X241)
+	proto.RegisterExtension(E_X242)
+	proto.RegisterExtension(E_X243)
+	proto.RegisterExtension(E_X244)
+	proto.RegisterExtension(E_X245)
+	proto.RegisterExtension(E_X246)
+	proto.RegisterExtension(E_X247)
+	proto.RegisterExtension(E_X248)
+	proto.RegisterExtension(E_X249)
+	proto.RegisterExtension(E_X250)
+}
+
+func init() { proto.RegisterFile("test_proto/test.proto", fileDescriptor_test_74787bfc6550f8a7) }
+
+var fileDescriptor_test_74787bfc6550f8a7 = []byte{
+	// 4680 bytes of a gzipped FileDescriptorProto
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+	0xa7, 0x82, 0x48, 0x79, 0x3e, 0x1a, 0x29, 0xfd, 0xca, 0xaa, 0xc1, 0xba, 0x24, 0x44, 0x49, 0xec,
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+	0x2a, 0xc6, 0x3f, 0xbf, 0xb2, 0x6a, 0x10, 0x23, 0x12, 0xfc, 0x64, 0x89, 0x08, 0xae, 0x06, 0x86,
+	0x81, 0x2a, 0x9d, 0x38, 0xef, 0x80, 0x9a, 0x97, 0x7e, 0xc2, 0x82, 0x33, 0xea, 0x1d, 0xd0, 0x0c,
+	0x48, 0x75, 0x78, 0xae, 0xae, 0xa1, 0x27, 0x0b, 0x89, 0x13, 0x25, 0xb0, 0x5c, 0x6f, 0xa2, 0x47,
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+	0xad, 0xae, 0x7f, 0xeb, 0x41, 0x55, 0x90, 0xad, 0xf3, 0x9a, 0xdd, 0x56, 0x97, 0x9c, 0xf1, 0x24,
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+	0xac, 0xbb, 0xa3, 0x23, 0x52, 0xf0, 0x0e, 0xf0, 0xa8, 0x20, 0x14, 0x26, 0x3f, 0xd0, 0x2f, 0xf2,
+	0xe3, 0x68, 0x92, 0xaf, 0xa4, 0x77, 0x20, 0x65, 0x49, 0x4e, 0x8a, 0xaf, 0x21, 0x4b, 0x73, 0xce,
+	0x42, 0xd2, 0xb5, 0x06, 0xc3, 0xe6, 0x3e, 0x0a, 0x86, 0x8a, 0x22, 0x41, 0xdf, 0xef, 0x92, 0xeb,
+	0x10, 0xdb, 0x77, 0xfa, 0x28, 0x95, 0xe7, 0xae, 0x0e, 0x45, 0x92, 0x57, 0x20, 0x36, 0x18, 0x33,
+	0xf9, 0x64, 0xcb, 0xa7, 0x43, 0x27, 0x08, 0x16, 0xb2, 0x28, 0x70, 0x30, 0xee, 0xfa, 0x63, 0xbf,
+	0x92, 0x87, 0x58, 0xbd, 0xd1, 0xa0, 0xa7, 0x82, 0x7a, 0xa3, 0xb1, 0xaa, 0x29, 0xb5, 0x55, 0x48,
+	0x77, 0x47, 0x96, 0x45, 0x1d, 0xc5, 0xb3, 0xb2, 0x92, 0x2f, 0x63, 0x14, 0xf4, 0x61, 0xb5, 0xb7,
+	0x21, 0xb5, 0xcf, 0xf2, 0x12, 0xf2, 0xcc, 0x1c, 0xbc, 0xf0, 0xc7, 0xec, 0x2e, 0xe8, 0x45, 0x11,
+	0x10, 0xcd, 0x66, 0x4c, 0x8f, 0xa7, 0xb6, 0x0b, 0x99, 0x51, 0xf3, 0xf9, 0xa4, 0x1f, 0xb2, 0xc8,
+	0x23, 0x27, 0x4d, 0x8f, 0x78, 0x51, 0x6d, 0x03, 0x16, 0x6c, 0xc7, 0xfb, 0x49, 0xaa, 0xd9, 0xe6,
+	0xfb, 0x6e, 0xd6, 0x91, 0xcf, 0x6b, 0xc0, 0x62, 0x3f, 0x6c, 0xdb, 0x0e, 0xaf, 0x60, 0x7b, 0xb5,
+	0xb6, 0x0e, 0x9a, 0x40, 0xd4, 0x61, 0x9b, 0x5b, 0xc6, 0xd3, 0x61, 0xbf, 0xa5, 0xfb, 0x3c, 0xe8,
+	0x0f, 0x22, 0x34, 0x7c, 0xc7, 0xca, 0x68, 0xba, 0xec, 0xd3, 0x04, 0x9f, 0x06, 0x9d, 0xe0, 0x34,
+	0x0d, 0xf5, 0x5f, 0x32, 0x9a, 0x03, 0xf6, 0xdd, 0x82, 0x48, 0x53, 0x35, 0x22, 0xb3, 0x33, 0x39,
+	0x46, 0x77, 0x7a, 0xec, 0xc3, 0x03, 0x9f, 0x87, 0xb9, 0xc7, 0x19, 0x44, 0xcf, 0xeb, 0xd0, 0x97,
+	0xd9, 0x57, 0x09, 0x21, 0xa2, 0xa9, 0x1e, 0x8d, 0x8f, 0xd1, 0xa3, 0x27, 0xec, 0x23, 0x00, 0x9f,
+	0x68, 0x67, 0x56, 0x8f, 0xc6, 0xc7, 0xe8, 0x51, 0x9f, 0x7d, 0x20, 0x10, 0x22, 0xaa, 0x1a, 0xb5,
+	0x4d, 0x20, 0xe2, 0xc2, 0xf3, 0x58, 0x22, 0x65, 0x1a, 0xb0, 0x0f, 0x3f, 0x82, 0xa5, 0x67, 0x46,
+	0xb3, 0xa8, 0x9e, 0xd7, 0x29, 0x9b, 0x7d, 0x15, 0x12, 0xa6, 0xaa, 0x1a, 0xb5, 0x07, 0x70, 0x5a,
+	0x1c, 0xde, 0xb1, 0xba, 0xe5, 0xb0, 0x4f, 0x1a, 0x82, 0x01, 0x72, 0xab, 0x99, 0x64, 0xcf, 0xeb,
+	0xd8, 0x90, 0x7d, 0xee, 0x10, 0x21, 0xab, 0x1a, 0xb5, 0xbb, 0x90, 0x17, 0xc8, 0xf6, 0x30, 0x0b,
+	0x96, 0x11, 0xbd, 0xcf, 0x3e, 0xd2, 0xf1, 0x89, 0x68, 0xfc, 0x8f, 0xae, 0x1e, 0x8b, 0x88, 0x52,
+	0x9a, 0x11, 0xfb, 0xc6, 0x24, 0xe8, 0x0f, 0xda, 0x44, 0x36, 0xca, 0x1e, 0x0b, 0x9f, 0x32, 0x9e,
+	0x31, 0xfb, 0xfe, 0x24, 0xe8, 0x0e, 0x35, 0xa9, 0x0d, 0x42, 0x83, 0xb2, 0x68, 0x50, 0x94, 0xb2,
+	0xb8, 0xe8, 0xbf, 0x4b, 0x12, 0xc8, 0xb2, 0x78, 0xd9, 0x22, 0x0c, 0x9f, 0xbe, 0xd6, 0x1e, 0xc0,
+	0xfc, 0x49, 0x5c, 0xd6, 0x87, 0x0a, 0xcb, 0xbc, 0x2b, 0xcb, 0x34, 0x39, 0x37, 0xe7, 0xda, 0x21,
+	0xcf, 0xb5, 0x01, 0x73, 0x27, 0x70, 0x5b, 0x1f, 0x29, 0x2c, 0x7f, 0xa5, 0x5c, 0x66, 0xae, 0x1d,
+	0xf6, 0x5d, 0x73, 0x27, 0x70, 0x5c, 0x1f, 0x2b, 0xec, 0xc2, 0xc3, 0x28, 0xfb, 0x34, 0x9e, 0xef,
+	0x9a, 0x3b, 0x81, 0xe3, 0xfa, 0x84, 0xe5, 0xa7, 0xaa, 0x51, 0x11, 0x69, 0xd0, 0x53, 0xcc, 0x9f,
+	0xc4, 0x71, 0x7d, 0xaa, 0xe0, 0x05, 0x88, 0x6a, 0x18, 0xfe, 0xfc, 0xf8, 0xbe, 0x6b, 0xfe, 0x24,
+	0x8e, 0xeb, 0xab, 0x0a, 0x5e, 0x94, 0xa8, 0xc6, 0x5a, 0x88, 0x28, 0xdc, 0xa3, 0xe3, 0x38, 0xae,
+	0xaf, 0x29, 0x78, 0x7b, 0xa1, 0x1a, 0x55, 0x9f, 0x68, 0x67, 0xaa, 0x47, 0xc7, 0x71, 0x5c, 0x5f,
+	0xc7, 0x6c, 0xa0, 0xa6, 0x1a, 0x37, 0x42, 0x44, 0xe8, 0xbb, 0xf2, 0x27, 0x72, 0x5c, 0xdf, 0x50,
+	0xf0, 0xa2, 0x49, 0x35, 0x6e, 0x9a, 0x5e, 0x0f, 0x02, 0xdf, 0x95, 0x3f, 0x91, 0xe3, 0xfa, 0xa6,
+	0x82, 0x37, 0x52, 0xaa, 0x71, 0x2b, 0x4c, 0x85, 0xbe, 0x4b, 0x3b, 0x99, 0xe3, 0xfa, 0x4c, 0xc1,
+	0xef, 0x4f, 0xd4, 0xb5, 0x15, 0xd3, 0xeb, 0x84, 0xe0, 0xbb, 0xb4, 0x93, 0x39, 0xae, 0x6f, 0x29,
+	0xf8, 0x51, 0x8a, 0xba, 0xb6, 0x1a, 0x21, 0xab, 0x1a, 0xb5, 0x75, 0xc8, 0x1d, 0xdf, 0x71, 0x7d,
+	0x5b, 0xbc, 0xef, 0xcb, 0xb6, 0x05, 0xef, 0xf5, 0x58, 0x58, 0xbf, 0x63, 0xb8, 0xae, 0xef, 0x60,
+	0xd6, 0x54, 0x7b, 0xe1, 0x3e, 0xbb, 0x15, 0x63, 0x26, 0xaf, 0xb5, 0xad, 0xce, 0x1b, 0x1d, 0xc7,
+	0x09, 0x96, 0x94, 0x39, 0xb4, 0x46, 0xb0, 0x7b, 0x8e, 0xe1, 0xcd, 0xbe, 0xab, 0xe0, 0x25, 0x5a,
+	0x8e, 0x53, 0xa3, 0x85, 0xbf, 0x8f, 0x98, 0x6b, 0xb3, 0x83, 0x31, 0x3f, 0xdf, 0xaf, 0x7d, 0x4f,
+	0x39, 0x99, 0x63, 0xab, 0xc5, 0x1a, 0xdb, 0xeb, 0xfe, 0xe4, 0x60, 0xc9, 0x5b, 0x10, 0x3f, 0x2c,
+	0xaf, 0xac, 0x86, 0x8f, 0x78, 0xe2, 0x1d, 0x32, 0x73, 0x67, 0xd9, 0xf2, 0x42, 0xe8, 0xb2, 0x7d,
+	0x30, 0x74, 0x8f, 0x4c, 0xb4, 0xe4, 0x0c, 0x65, 0x09, 0xc3, 0x47, 0x52, 0x86, 0x32, 0x67, 0xa8,
+	0x48, 0x18, 0x3e, 0x96, 0x32, 0x54, 0x38, 0x83, 0x21, 0x61, 0xf8, 0x44, 0xca, 0x60, 0x70, 0x86,
+	0x35, 0x09, 0xc3, 0xa7, 0x52, 0x86, 0x35, 0xce, 0x50, 0x95, 0x30, 0x7c, 0x55, 0xca, 0x50, 0xe5,
+	0x0c, 0x37, 0x24, 0x0c, 0x5f, 0x93, 0x32, 0xdc, 0xe0, 0x0c, 0x37, 0x25, 0x0c, 0x5f, 0x97, 0x32,
+	0xdc, 0xe4, 0x0c, 0xb7, 0x24, 0x0c, 0xdf, 0x90, 0x32, 0xdc, 0x62, 0x0c, 0xab, 0x2b, 0x12, 0x86,
+	0x6f, 0xca, 0x18, 0x56, 0x57, 0x38, 0x83, 0x4c, 0x93, 0x9f, 0x49, 0x19, 0xb8, 0x26, 0x57, 0x65,
+	0x9a, 0xfc, 0x96, 0x94, 0x81, 0x6b, 0x72, 0x55, 0xa6, 0xc9, 0x6f, 0x4b, 0x19, 0xb8, 0x26, 0x57,
+	0x65, 0x9a, 0xfc, 0x8e, 0x94, 0x81, 0x6b, 0x72, 0x55, 0xa6, 0xc9, 0xef, 0x4a, 0x19, 0xb8, 0x26,
+	0x57, 0x65, 0x9a, 0xfc, 0x9e, 0x94, 0x81, 0x6b, 0x72, 0x55, 0xa6, 0xc9, 0x3f, 0x91, 0x32, 0x70,
+	0x4d, 0xae, 0xca, 0x34, 0xf9, 0xa7, 0x52, 0x06, 0xae, 0xc9, 0x55, 0x99, 0x26, 0xff, 0x4c, 0xca,
+	0xc0, 0x35, 0x59, 0x96, 0x69, 0xf2, 0xfb, 0x32, 0x86, 0x32, 0xd7, 0x64, 0x59, 0xa6, 0xc9, 0x3f,
+	0x97, 0x32, 0x70, 0x4d, 0x96, 0x65, 0x9a, 0xfc, 0x0b, 0x29, 0x03, 0xd7, 0x64, 0x59, 0xa6, 0xc9,
+	0x1f, 0x48, 0x19, 0xb8, 0x26, 0xcb, 0x32, 0x4d, 0xfe, 0xa5, 0x94, 0x81, 0x6b, 0xb2, 0x2c, 0xd3,
+	0xe4, 0x5f, 0x49, 0x19, 0xb8, 0x26, 0xcb, 0x32, 0x4d, 0xfe, 0xb5, 0x94, 0x81, 0x6b, 0xb2, 0x2c,
+	0xd3, 0xe4, 0xdf, 0x48, 0x19, 0xb8, 0x26, 0xcb, 0x32, 0x4d, 0xfe, 0xad, 0x94, 0x81, 0x6b, 0xb2,
+	0x2c, 0xd3, 0xe4, 0xdf, 0x49, 0x19, 0xb8, 0x26, 0x2b, 0x32, 0x4d, 0xfe, 0xbd, 0x8c, 0xa1, 0xc2,
+	0x35, 0x59, 0x91, 0x69, 0xf2, 0x1f, 0xa4, 0x0c, 0x5c, 0x93, 0x15, 0x99, 0x26, 0xff, 0x51, 0xca,
+	0xc0, 0x35, 0x59, 0x91, 0x69, 0xf2, 0x9f, 0xa4, 0x0c, 0x5c, 0x93, 0x15, 0x99, 0x26, 0xff, 0x59,
+	0xca, 0xc0, 0x35, 0x59, 0x91, 0x69, 0xf2, 0x5f, 0xa4, 0x0c, 0x5c, 0x93, 0x15, 0x99, 0x26, 0xff,
+	0x55, 0xca, 0xc0, 0x35, 0x59, 0x91, 0x69, 0xf2, 0xdf, 0xa4, 0x0c, 0x5c, 0x93, 0x15, 0x99, 0x26,
+	0x7f, 0x28, 0x65, 0xe0, 0x9a, 0xac, 0xc8, 0x34, 0xf9, 0xef, 0x52, 0x06, 0xae, 0x49, 0x43, 0xa6,
+	0xc9, 0xff, 0x90, 0x31, 0x18, 0x5c, 0x93, 0x86, 0x4c, 0x93, 0xff, 0x29, 0x65, 0xe0, 0x9a, 0x34,
+	0x64, 0x9a, 0xfc, 0x2f, 0x29, 0x03, 0xd7, 0xa4, 0x21, 0xd3, 0xe4, 0x7f, 0x4b, 0x19, 0xb8, 0x26,
+	0x0d, 0x99, 0x26, 0xff, 0x47, 0xca, 0xc0, 0x35, 0x69, 0xc8, 0x34, 0xf9, 0xbf, 0x52, 0x06, 0xae,
+	0x49, 0x43, 0xa6, 0xc9, 0x1f, 0x49, 0x19, 0xb8, 0x26, 0x0d, 0x99, 0x26, 0x7f, 0x2c, 0x65, 0xe0,
+	0x9a, 0x34, 0x64, 0x9a, 0xfc, 0x89, 0x94, 0x81, 0x6b, 0xd2, 0x90, 0x69, 0xf2, 0xa7, 0x52, 0x06,
+	0xae, 0xc9, 0x35, 0x99, 0x26, 0xff, 0x4f, 0xc6, 0xb0, 0xb6, 0x72, 0xe7, 0xda, 0xe3, 0xab, 0xdd,
+	0x9e, 0x7b, 0x30, 0xd9, 0x5b, 0xde, 0x77, 0x06, 0xd7, 0xbb, 0x4e, 0xbf, 0x65, 0x77, 0xaf, 0x23,
+	0x6c, 0x6f, 0xd2, 0xb9, 0x1e, 0xfc, 0xeb, 0x35, 0x33, 0xfd, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff,
+	0x46, 0xc7, 0xb3, 0x38, 0x92, 0x3d, 0x00, 0x00,
+}
diff --git a/proto/testdata/test.proto b/proto/test_proto/test.proto
similarity index 95%
rename from proto/testdata/test.proto
rename to proto/test_proto/test.proto
index 70e3cfc..22068a9 100644
--- a/proto/testdata/test.proto
+++ b/proto/test_proto/test.proto
@@ -33,7 +33,9 @@
 
 syntax = "proto2";
 
-package testdata;
+option go_package = "github.com/golang/protobuf/proto/test_proto";
+
+package test_proto;
 
 enum FOO { FOO1 = 1; };
 
@@ -96,6 +98,8 @@
   required bytes F_Bytes_required = 101;
   required sint32 F_Sint32_required = 102;
   required sint64 F_Sint64_required = 103;
+  required sfixed32 F_Sfixed32_required = 104;
+  required sfixed64 F_Sfixed64_required = 105;
 
   // Repeated fields of all basic types
   repeated bool F_Bool_repeated = 20;
@@ -111,6 +115,8 @@
   repeated bytes F_Bytes_repeated = 201;
   repeated sint32 F_Sint32_repeated = 202;
   repeated sint64 F_Sint64_repeated = 203;
+  repeated sfixed32 F_Sfixed32_repeated = 204;
+  repeated sfixed64 F_Sfixed64_repeated = 205;
 
   // Optional fields of all basic types
   optional bool F_Bool_optional = 30;
@@ -126,6 +132,8 @@
   optional bytes F_Bytes_optional = 301;
   optional sint32 F_Sint32_optional = 302;
   optional sint64 F_Sint64_optional = 303;
+  optional sfixed32 F_Sfixed32_optional = 304;
+  optional sfixed64 F_Sfixed64_optional = 305;
 
   // Default-valued fields of all basic types
   optional bool F_Bool_defaulted = 40 [default=true];
@@ -141,6 +149,8 @@
   optional bytes F_Bytes_defaulted = 401 [default="Bignose"];
   optional sint32 F_Sint32_defaulted = 402 [default = -32];
   optional sint64 F_Sint64_defaulted = 403 [default = -64];
+  optional sfixed32 F_Sfixed32_defaulted = 404 [default = -32];
+  optional sfixed64 F_Sfixed64_defaulted = 405 [default = -64];
 
   // Packed repeated fields (no string or bytes).
   repeated bool F_Bool_repeated_packed = 50 [packed=true];
@@ -154,6 +164,8 @@
   repeated double F_Double_repeated_packed = 58 [packed=true];
   repeated sint32 F_Sint32_repeated_packed = 502 [packed=true];
   repeated sint64 F_Sint64_repeated_packed = 503 [packed=true];
+  repeated sfixed32 F_Sfixed32_repeated_packed = 504 [packed=true];
+  repeated sfixed64 F_Sfixed64_repeated_packed = 505 [packed=true];
 
   // Required, repeated, and optional groups.
   required group RequiredGroup = 70 {
@@ -285,10 +297,12 @@
   }
 
   optional string data = 1;
+  map<int32, int32> map_field = 2;
 }
 
 extend MyMessage {
   repeated string greeting = 106;
+  // leave field 200 unregistered for testing
 }
 
 message ComplexExtension {
@@ -342,7 +356,7 @@
   optional sfixed32 default_sfixed32 = 211 [default = 50];
   optional sfixed64 default_sfixed64 = 212 [default = 51];
   optional bool default_bool = 213 [default = true];
-  optional string default_string = 214 [default = "Hello, string"];
+  optional string default_string = 214 [default = "Hello, string,def=foo"];
   optional bytes default_bytes = 215 [default = "Hello, bytes"];
   optional DefaultsMessage.DefaultsEnum default_enum = 216 [default = ONE];
 }
diff --git a/proto/testdata/Makefile b/proto/testdata/Makefile
deleted file mode 100644
index fc28862..0000000
--- a/proto/testdata/Makefile
+++ /dev/null
@@ -1,50 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-include ../../Make.protobuf
-
-all:	regenerate
-
-regenerate:
-	rm -f test.pb.go
-	make test.pb.go
-
-# The following rules are just aids to development. Not needed for typical testing.
-
-diff:	regenerate
-	git diff test.pb.go
-
-restore:
-	cp test.pb.go.golden test.pb.go
-
-preserve:
-	cp test.pb.go test.pb.go.golden
diff --git a/proto/testdata/golden_test.go b/proto/testdata/golden_test.go
deleted file mode 100644
index 7172d0e..0000000
--- a/proto/testdata/golden_test.go
+++ /dev/null
@@ -1,86 +0,0 @@
-// Go support for Protocol Buffers - Google's data interchange format
-//
-// Copyright 2012 The Go Authors.  All rights reserved.
-// https://github.com/golang/protobuf
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Verify that the compiler output for test.proto is unchanged.
-
-package testdata
-
-import (
-	"crypto/sha1"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"testing"
-)
-
-// sum returns in string form (for easy comparison) the SHA-1 hash of the named file.
-func sum(t *testing.T, name string) string {
-	data, err := ioutil.ReadFile(name)
-	if err != nil {
-		t.Fatal(err)
-	}
-	t.Logf("sum(%q): length is %d", name, len(data))
-	hash := sha1.New()
-	_, err = hash.Write(data)
-	if err != nil {
-		t.Fatal(err)
-	}
-	return fmt.Sprintf("% x", hash.Sum(nil))
-}
-
-func run(t *testing.T, name string, args ...string) {
-	cmd := exec.Command(name, args...)
-	cmd.Stdin = os.Stdin
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	err := cmd.Run()
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
-func TestGolden(t *testing.T) {
-	// Compute the original checksum.
-	goldenSum := sum(t, "test.pb.go")
-	// Run the proto compiler.
-	run(t, "protoc", "--go_out="+os.TempDir(), "test.proto")
-	newFile := filepath.Join(os.TempDir(), "test.pb.go")
-	defer os.Remove(newFile)
-	// Compute the new checksum.
-	newSum := sum(t, newFile)
-	// Verify
-	if newSum != goldenSum {
-		run(t, "diff", "-u", "test.pb.go", newFile)
-		t.Fatal("Code generated by protoc-gen-go has changed; update test.pb.go")
-	}
-}
diff --git a/proto/testdata/test.pb.go b/proto/testdata/test.pb.go
deleted file mode 100644
index e980d1a..0000000
--- a/proto/testdata/test.pb.go
+++ /dev/null
@@ -1,4147 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: test.proto
-
-/*
-Package testdata is a generated protocol buffer package.
-
-It is generated from these files:
-	test.proto
-
-It has these top-level messages:
-	GoEnum
-	GoTestField
-	GoTest
-	GoTestRequiredGroupField
-	GoSkipTest
-	NonPackedTest
-	PackedTest
-	MaxTag
-	OldMessage
-	NewMessage
-	InnerMessage
-	OtherMessage
-	RequiredInnerMessage
-	MyMessage
-	Ext
-	ComplexExtension
-	DefaultsMessage
-	MyMessageSet
-	Empty
-	MessageList
-	Strings
-	Defaults
-	SubDefaults
-	RepeatedEnum
-	MoreRepeated
-	GroupOld
-	GroupNew
-	FloatingPoint
-	MessageWithMap
-	Oneof
-	Communique
-*/
-package testdata
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type FOO int32
-
-const (
-	FOO_FOO1 FOO = 1
-)
-
-var FOO_name = map[int32]string{
-	1: "FOO1",
-}
-var FOO_value = map[string]int32{
-	"FOO1": 1,
-}
-
-func (x FOO) Enum() *FOO {
-	p := new(FOO)
-	*p = x
-	return p
-}
-func (x FOO) String() string {
-	return proto.EnumName(FOO_name, int32(x))
-}
-func (x *FOO) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(FOO_value, data, "FOO")
-	if err != nil {
-		return err
-	}
-	*x = FOO(value)
-	return nil
-}
-func (FOO) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-
-// An enum, for completeness.
-type GoTest_KIND int32
-
-const (
-	GoTest_VOID GoTest_KIND = 0
-	// Basic types
-	GoTest_BOOL        GoTest_KIND = 1
-	GoTest_BYTES       GoTest_KIND = 2
-	GoTest_FINGERPRINT GoTest_KIND = 3
-	GoTest_FLOAT       GoTest_KIND = 4
-	GoTest_INT         GoTest_KIND = 5
-	GoTest_STRING      GoTest_KIND = 6
-	GoTest_TIME        GoTest_KIND = 7
-	// Groupings
-	GoTest_TUPLE GoTest_KIND = 8
-	GoTest_ARRAY GoTest_KIND = 9
-	GoTest_MAP   GoTest_KIND = 10
-	// Table types
-	GoTest_TABLE GoTest_KIND = 11
-	// Functions
-	GoTest_FUNCTION GoTest_KIND = 12
-)
-
-var GoTest_KIND_name = map[int32]string{
-	0:  "VOID",
-	1:  "BOOL",
-	2:  "BYTES",
-	3:  "FINGERPRINT",
-	4:  "FLOAT",
-	5:  "INT",
-	6:  "STRING",
-	7:  "TIME",
-	8:  "TUPLE",
-	9:  "ARRAY",
-	10: "MAP",
-	11: "TABLE",
-	12: "FUNCTION",
-}
-var GoTest_KIND_value = map[string]int32{
-	"VOID":        0,
-	"BOOL":        1,
-	"BYTES":       2,
-	"FINGERPRINT": 3,
-	"FLOAT":       4,
-	"INT":         5,
-	"STRING":      6,
-	"TIME":        7,
-	"TUPLE":       8,
-	"ARRAY":       9,
-	"MAP":         10,
-	"TABLE":       11,
-	"FUNCTION":    12,
-}
-
-func (x GoTest_KIND) Enum() *GoTest_KIND {
-	p := new(GoTest_KIND)
-	*p = x
-	return p
-}
-func (x GoTest_KIND) String() string {
-	return proto.EnumName(GoTest_KIND_name, int32(x))
-}
-func (x *GoTest_KIND) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(GoTest_KIND_value, data, "GoTest_KIND")
-	if err != nil {
-		return err
-	}
-	*x = GoTest_KIND(value)
-	return nil
-}
-func (GoTest_KIND) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 0} }
-
-type MyMessage_Color int32
-
-const (
-	MyMessage_RED   MyMessage_Color = 0
-	MyMessage_GREEN MyMessage_Color = 1
-	MyMessage_BLUE  MyMessage_Color = 2
-)
-
-var MyMessage_Color_name = map[int32]string{
-	0: "RED",
-	1: "GREEN",
-	2: "BLUE",
-}
-var MyMessage_Color_value = map[string]int32{
-	"RED":   0,
-	"GREEN": 1,
-	"BLUE":  2,
-}
-
-func (x MyMessage_Color) Enum() *MyMessage_Color {
-	p := new(MyMessage_Color)
-	*p = x
-	return p
-}
-func (x MyMessage_Color) String() string {
-	return proto.EnumName(MyMessage_Color_name, int32(x))
-}
-func (x *MyMessage_Color) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(MyMessage_Color_value, data, "MyMessage_Color")
-	if err != nil {
-		return err
-	}
-	*x = MyMessage_Color(value)
-	return nil
-}
-func (MyMessage_Color) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{13, 0} }
-
-type DefaultsMessage_DefaultsEnum int32
-
-const (
-	DefaultsMessage_ZERO DefaultsMessage_DefaultsEnum = 0
-	DefaultsMessage_ONE  DefaultsMessage_DefaultsEnum = 1
-	DefaultsMessage_TWO  DefaultsMessage_DefaultsEnum = 2
-)
-
-var DefaultsMessage_DefaultsEnum_name = map[int32]string{
-	0: "ZERO",
-	1: "ONE",
-	2: "TWO",
-}
-var DefaultsMessage_DefaultsEnum_value = map[string]int32{
-	"ZERO": 0,
-	"ONE":  1,
-	"TWO":  2,
-}
-
-func (x DefaultsMessage_DefaultsEnum) Enum() *DefaultsMessage_DefaultsEnum {
-	p := new(DefaultsMessage_DefaultsEnum)
-	*p = x
-	return p
-}
-func (x DefaultsMessage_DefaultsEnum) String() string {
-	return proto.EnumName(DefaultsMessage_DefaultsEnum_name, int32(x))
-}
-func (x *DefaultsMessage_DefaultsEnum) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(DefaultsMessage_DefaultsEnum_value, data, "DefaultsMessage_DefaultsEnum")
-	if err != nil {
-		return err
-	}
-	*x = DefaultsMessage_DefaultsEnum(value)
-	return nil
-}
-func (DefaultsMessage_DefaultsEnum) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{16, 0}
-}
-
-type Defaults_Color int32
-
-const (
-	Defaults_RED   Defaults_Color = 0
-	Defaults_GREEN Defaults_Color = 1
-	Defaults_BLUE  Defaults_Color = 2
-)
-
-var Defaults_Color_name = map[int32]string{
-	0: "RED",
-	1: "GREEN",
-	2: "BLUE",
-}
-var Defaults_Color_value = map[string]int32{
-	"RED":   0,
-	"GREEN": 1,
-	"BLUE":  2,
-}
-
-func (x Defaults_Color) Enum() *Defaults_Color {
-	p := new(Defaults_Color)
-	*p = x
-	return p
-}
-func (x Defaults_Color) String() string {
-	return proto.EnumName(Defaults_Color_name, int32(x))
-}
-func (x *Defaults_Color) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(Defaults_Color_value, data, "Defaults_Color")
-	if err != nil {
-		return err
-	}
-	*x = Defaults_Color(value)
-	return nil
-}
-func (Defaults_Color) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{21, 0} }
-
-type RepeatedEnum_Color int32
-
-const (
-	RepeatedEnum_RED RepeatedEnum_Color = 1
-)
-
-var RepeatedEnum_Color_name = map[int32]string{
-	1: "RED",
-}
-var RepeatedEnum_Color_value = map[string]int32{
-	"RED": 1,
-}
-
-func (x RepeatedEnum_Color) Enum() *RepeatedEnum_Color {
-	p := new(RepeatedEnum_Color)
-	*p = x
-	return p
-}
-func (x RepeatedEnum_Color) String() string {
-	return proto.EnumName(RepeatedEnum_Color_name, int32(x))
-}
-func (x *RepeatedEnum_Color) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(RepeatedEnum_Color_value, data, "RepeatedEnum_Color")
-	if err != nil {
-		return err
-	}
-	*x = RepeatedEnum_Color(value)
-	return nil
-}
-func (RepeatedEnum_Color) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{23, 0} }
-
-type GoEnum struct {
-	Foo              *FOO   `protobuf:"varint,1,req,name=foo,enum=testdata.FOO" json:"foo,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *GoEnum) Reset()                    { *m = GoEnum{} }
-func (m *GoEnum) String() string            { return proto.CompactTextString(m) }
-func (*GoEnum) ProtoMessage()               {}
-func (*GoEnum) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-
-func (m *GoEnum) GetFoo() FOO {
-	if m != nil && m.Foo != nil {
-		return *m.Foo
-	}
-	return FOO_FOO1
-}
-
-type GoTestField struct {
-	Label            *string `protobuf:"bytes,1,req,name=Label" json:"Label,omitempty"`
-	Type             *string `protobuf:"bytes,2,req,name=Type" json:"Type,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *GoTestField) Reset()                    { *m = GoTestField{} }
-func (m *GoTestField) String() string            { return proto.CompactTextString(m) }
-func (*GoTestField) ProtoMessage()               {}
-func (*GoTestField) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
-
-func (m *GoTestField) GetLabel() string {
-	if m != nil && m.Label != nil {
-		return *m.Label
-	}
-	return ""
-}
-
-func (m *GoTestField) GetType() string {
-	if m != nil && m.Type != nil {
-		return *m.Type
-	}
-	return ""
-}
-
-type GoTest struct {
-	// Some typical parameters
-	Kind  *GoTest_KIND `protobuf:"varint,1,req,name=Kind,enum=testdata.GoTest_KIND" json:"Kind,omitempty"`
-	Table *string      `protobuf:"bytes,2,opt,name=Table" json:"Table,omitempty"`
-	Param *int32       `protobuf:"varint,3,opt,name=Param" json:"Param,omitempty"`
-	// Required, repeated and optional foreign fields.
-	RequiredField *GoTestField   `protobuf:"bytes,4,req,name=RequiredField" json:"RequiredField,omitempty"`
-	RepeatedField []*GoTestField `protobuf:"bytes,5,rep,name=RepeatedField" json:"RepeatedField,omitempty"`
-	OptionalField *GoTestField   `protobuf:"bytes,6,opt,name=OptionalField" json:"OptionalField,omitempty"`
-	// Required fields of all basic types
-	F_BoolRequired    *bool    `protobuf:"varint,10,req,name=F_Bool_required,json=FBoolRequired" json:"F_Bool_required,omitempty"`
-	F_Int32Required   *int32   `protobuf:"varint,11,req,name=F_Int32_required,json=FInt32Required" json:"F_Int32_required,omitempty"`
-	F_Int64Required   *int64   `protobuf:"varint,12,req,name=F_Int64_required,json=FInt64Required" json:"F_Int64_required,omitempty"`
-	F_Fixed32Required *uint32  `protobuf:"fixed32,13,req,name=F_Fixed32_required,json=FFixed32Required" json:"F_Fixed32_required,omitempty"`
-	F_Fixed64Required *uint64  `protobuf:"fixed64,14,req,name=F_Fixed64_required,json=FFixed64Required" json:"F_Fixed64_required,omitempty"`
-	F_Uint32Required  *uint32  `protobuf:"varint,15,req,name=F_Uint32_required,json=FUint32Required" json:"F_Uint32_required,omitempty"`
-	F_Uint64Required  *uint64  `protobuf:"varint,16,req,name=F_Uint64_required,json=FUint64Required" json:"F_Uint64_required,omitempty"`
-	F_FloatRequired   *float32 `protobuf:"fixed32,17,req,name=F_Float_required,json=FFloatRequired" json:"F_Float_required,omitempty"`
-	F_DoubleRequired  *float64 `protobuf:"fixed64,18,req,name=F_Double_required,json=FDoubleRequired" json:"F_Double_required,omitempty"`
-	F_StringRequired  *string  `protobuf:"bytes,19,req,name=F_String_required,json=FStringRequired" json:"F_String_required,omitempty"`
-	F_BytesRequired   []byte   `protobuf:"bytes,101,req,name=F_Bytes_required,json=FBytesRequired" json:"F_Bytes_required,omitempty"`
-	F_Sint32Required  *int32   `protobuf:"zigzag32,102,req,name=F_Sint32_required,json=FSint32Required" json:"F_Sint32_required,omitempty"`
-	F_Sint64Required  *int64   `protobuf:"zigzag64,103,req,name=F_Sint64_required,json=FSint64Required" json:"F_Sint64_required,omitempty"`
-	// Repeated fields of all basic types
-	F_BoolRepeated    []bool    `protobuf:"varint,20,rep,name=F_Bool_repeated,json=FBoolRepeated" json:"F_Bool_repeated,omitempty"`
-	F_Int32Repeated   []int32   `protobuf:"varint,21,rep,name=F_Int32_repeated,json=FInt32Repeated" json:"F_Int32_repeated,omitempty"`
-	F_Int64Repeated   []int64   `protobuf:"varint,22,rep,name=F_Int64_repeated,json=FInt64Repeated" json:"F_Int64_repeated,omitempty"`
-	F_Fixed32Repeated []uint32  `protobuf:"fixed32,23,rep,name=F_Fixed32_repeated,json=FFixed32Repeated" json:"F_Fixed32_repeated,omitempty"`
-	F_Fixed64Repeated []uint64  `protobuf:"fixed64,24,rep,name=F_Fixed64_repeated,json=FFixed64Repeated" json:"F_Fixed64_repeated,omitempty"`
-	F_Uint32Repeated  []uint32  `protobuf:"varint,25,rep,name=F_Uint32_repeated,json=FUint32Repeated" json:"F_Uint32_repeated,omitempty"`
-	F_Uint64Repeated  []uint64  `protobuf:"varint,26,rep,name=F_Uint64_repeated,json=FUint64Repeated" json:"F_Uint64_repeated,omitempty"`
-	F_FloatRepeated   []float32 `protobuf:"fixed32,27,rep,name=F_Float_repeated,json=FFloatRepeated" json:"F_Float_repeated,omitempty"`
-	F_DoubleRepeated  []float64 `protobuf:"fixed64,28,rep,name=F_Double_repeated,json=FDoubleRepeated" json:"F_Double_repeated,omitempty"`
-	F_StringRepeated  []string  `protobuf:"bytes,29,rep,name=F_String_repeated,json=FStringRepeated" json:"F_String_repeated,omitempty"`
-	F_BytesRepeated   [][]byte  `protobuf:"bytes,201,rep,name=F_Bytes_repeated,json=FBytesRepeated" json:"F_Bytes_repeated,omitempty"`
-	F_Sint32Repeated  []int32   `protobuf:"zigzag32,202,rep,name=F_Sint32_repeated,json=FSint32Repeated" json:"F_Sint32_repeated,omitempty"`
-	F_Sint64Repeated  []int64   `protobuf:"zigzag64,203,rep,name=F_Sint64_repeated,json=FSint64Repeated" json:"F_Sint64_repeated,omitempty"`
-	// Optional fields of all basic types
-	F_BoolOptional    *bool    `protobuf:"varint,30,opt,name=F_Bool_optional,json=FBoolOptional" json:"F_Bool_optional,omitempty"`
-	F_Int32Optional   *int32   `protobuf:"varint,31,opt,name=F_Int32_optional,json=FInt32Optional" json:"F_Int32_optional,omitempty"`
-	F_Int64Optional   *int64   `protobuf:"varint,32,opt,name=F_Int64_optional,json=FInt64Optional" json:"F_Int64_optional,omitempty"`
-	F_Fixed32Optional *uint32  `protobuf:"fixed32,33,opt,name=F_Fixed32_optional,json=FFixed32Optional" json:"F_Fixed32_optional,omitempty"`
-	F_Fixed64Optional *uint64  `protobuf:"fixed64,34,opt,name=F_Fixed64_optional,json=FFixed64Optional" json:"F_Fixed64_optional,omitempty"`
-	F_Uint32Optional  *uint32  `protobuf:"varint,35,opt,name=F_Uint32_optional,json=FUint32Optional" json:"F_Uint32_optional,omitempty"`
-	F_Uint64Optional  *uint64  `protobuf:"varint,36,opt,name=F_Uint64_optional,json=FUint64Optional" json:"F_Uint64_optional,omitempty"`
-	F_FloatOptional   *float32 `protobuf:"fixed32,37,opt,name=F_Float_optional,json=FFloatOptional" json:"F_Float_optional,omitempty"`
-	F_DoubleOptional  *float64 `protobuf:"fixed64,38,opt,name=F_Double_optional,json=FDoubleOptional" json:"F_Double_optional,omitempty"`
-	F_StringOptional  *string  `protobuf:"bytes,39,opt,name=F_String_optional,json=FStringOptional" json:"F_String_optional,omitempty"`
-	F_BytesOptional   []byte   `protobuf:"bytes,301,opt,name=F_Bytes_optional,json=FBytesOptional" json:"F_Bytes_optional,omitempty"`
-	F_Sint32Optional  *int32   `protobuf:"zigzag32,302,opt,name=F_Sint32_optional,json=FSint32Optional" json:"F_Sint32_optional,omitempty"`
-	F_Sint64Optional  *int64   `protobuf:"zigzag64,303,opt,name=F_Sint64_optional,json=FSint64Optional" json:"F_Sint64_optional,omitempty"`
-	// Default-valued fields of all basic types
-	F_BoolDefaulted    *bool    `protobuf:"varint,40,opt,name=F_Bool_defaulted,json=FBoolDefaulted,def=1" json:"F_Bool_defaulted,omitempty"`
-	F_Int32Defaulted   *int32   `protobuf:"varint,41,opt,name=F_Int32_defaulted,json=FInt32Defaulted,def=32" json:"F_Int32_defaulted,omitempty"`
-	F_Int64Defaulted   *int64   `protobuf:"varint,42,opt,name=F_Int64_defaulted,json=FInt64Defaulted,def=64" json:"F_Int64_defaulted,omitempty"`
-	F_Fixed32Defaulted *uint32  `protobuf:"fixed32,43,opt,name=F_Fixed32_defaulted,json=FFixed32Defaulted,def=320" json:"F_Fixed32_defaulted,omitempty"`
-	F_Fixed64Defaulted *uint64  `protobuf:"fixed64,44,opt,name=F_Fixed64_defaulted,json=FFixed64Defaulted,def=640" json:"F_Fixed64_defaulted,omitempty"`
-	F_Uint32Defaulted  *uint32  `protobuf:"varint,45,opt,name=F_Uint32_defaulted,json=FUint32Defaulted,def=3200" json:"F_Uint32_defaulted,omitempty"`
-	F_Uint64Defaulted  *uint64  `protobuf:"varint,46,opt,name=F_Uint64_defaulted,json=FUint64Defaulted,def=6400" json:"F_Uint64_defaulted,omitempty"`
-	F_FloatDefaulted   *float32 `protobuf:"fixed32,47,opt,name=F_Float_defaulted,json=FFloatDefaulted,def=314159" json:"F_Float_defaulted,omitempty"`
-	F_DoubleDefaulted  *float64 `protobuf:"fixed64,48,opt,name=F_Double_defaulted,json=FDoubleDefaulted,def=271828" json:"F_Double_defaulted,omitempty"`
-	F_StringDefaulted  *string  `protobuf:"bytes,49,opt,name=F_String_defaulted,json=FStringDefaulted,def=hello, \"world!\"\n" json:"F_String_defaulted,omitempty"`
-	F_BytesDefaulted   []byte   `protobuf:"bytes,401,opt,name=F_Bytes_defaulted,json=FBytesDefaulted,def=Bignose" json:"F_Bytes_defaulted,omitempty"`
-	F_Sint32Defaulted  *int32   `protobuf:"zigzag32,402,opt,name=F_Sint32_defaulted,json=FSint32Defaulted,def=-32" json:"F_Sint32_defaulted,omitempty"`
-	F_Sint64Defaulted  *int64   `protobuf:"zigzag64,403,opt,name=F_Sint64_defaulted,json=FSint64Defaulted,def=-64" json:"F_Sint64_defaulted,omitempty"`
-	// Packed repeated fields (no string or bytes).
-	F_BoolRepeatedPacked    []bool                  `protobuf:"varint,50,rep,packed,name=F_Bool_repeated_packed,json=FBoolRepeatedPacked" json:"F_Bool_repeated_packed,omitempty"`
-	F_Int32RepeatedPacked   []int32                 `protobuf:"varint,51,rep,packed,name=F_Int32_repeated_packed,json=FInt32RepeatedPacked" json:"F_Int32_repeated_packed,omitempty"`
-	F_Int64RepeatedPacked   []int64                 `protobuf:"varint,52,rep,packed,name=F_Int64_repeated_packed,json=FInt64RepeatedPacked" json:"F_Int64_repeated_packed,omitempty"`
-	F_Fixed32RepeatedPacked []uint32                `protobuf:"fixed32,53,rep,packed,name=F_Fixed32_repeated_packed,json=FFixed32RepeatedPacked" json:"F_Fixed32_repeated_packed,omitempty"`
-	F_Fixed64RepeatedPacked []uint64                `protobuf:"fixed64,54,rep,packed,name=F_Fixed64_repeated_packed,json=FFixed64RepeatedPacked" json:"F_Fixed64_repeated_packed,omitempty"`
-	F_Uint32RepeatedPacked  []uint32                `protobuf:"varint,55,rep,packed,name=F_Uint32_repeated_packed,json=FUint32RepeatedPacked" json:"F_Uint32_repeated_packed,omitempty"`
-	F_Uint64RepeatedPacked  []uint64                `protobuf:"varint,56,rep,packed,name=F_Uint64_repeated_packed,json=FUint64RepeatedPacked" json:"F_Uint64_repeated_packed,omitempty"`
-	F_FloatRepeatedPacked   []float32               `protobuf:"fixed32,57,rep,packed,name=F_Float_repeated_packed,json=FFloatRepeatedPacked" json:"F_Float_repeated_packed,omitempty"`
-	F_DoubleRepeatedPacked  []float64               `protobuf:"fixed64,58,rep,packed,name=F_Double_repeated_packed,json=FDoubleRepeatedPacked" json:"F_Double_repeated_packed,omitempty"`
-	F_Sint32RepeatedPacked  []int32                 `protobuf:"zigzag32,502,rep,packed,name=F_Sint32_repeated_packed,json=FSint32RepeatedPacked" json:"F_Sint32_repeated_packed,omitempty"`
-	F_Sint64RepeatedPacked  []int64                 `protobuf:"zigzag64,503,rep,packed,name=F_Sint64_repeated_packed,json=FSint64RepeatedPacked" json:"F_Sint64_repeated_packed,omitempty"`
-	Requiredgroup           *GoTest_RequiredGroup   `protobuf:"group,70,req,name=RequiredGroup,json=requiredgroup" json:"requiredgroup,omitempty"`
-	Repeatedgroup           []*GoTest_RepeatedGroup `protobuf:"group,80,rep,name=RepeatedGroup,json=repeatedgroup" json:"repeatedgroup,omitempty"`
-	Optionalgroup           *GoTest_OptionalGroup   `protobuf:"group,90,opt,name=OptionalGroup,json=optionalgroup" json:"optionalgroup,omitempty"`
-	XXX_unrecognized        []byte                  `json:"-"`
-}
-
-func (m *GoTest) Reset()                    { *m = GoTest{} }
-func (m *GoTest) String() string            { return proto.CompactTextString(m) }
-func (*GoTest) ProtoMessage()               {}
-func (*GoTest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
-
-const Default_GoTest_F_BoolDefaulted bool = true
-const Default_GoTest_F_Int32Defaulted int32 = 32
-const Default_GoTest_F_Int64Defaulted int64 = 64
-const Default_GoTest_F_Fixed32Defaulted uint32 = 320
-const Default_GoTest_F_Fixed64Defaulted uint64 = 640
-const Default_GoTest_F_Uint32Defaulted uint32 = 3200
-const Default_GoTest_F_Uint64Defaulted uint64 = 6400
-const Default_GoTest_F_FloatDefaulted float32 = 314159
-const Default_GoTest_F_DoubleDefaulted float64 = 271828
-const Default_GoTest_F_StringDefaulted string = "hello, \"world!\"\n"
-
-var Default_GoTest_F_BytesDefaulted []byte = []byte("Bignose")
-
-const Default_GoTest_F_Sint32Defaulted int32 = -32
-const Default_GoTest_F_Sint64Defaulted int64 = -64
-
-func (m *GoTest) GetKind() GoTest_KIND {
-	if m != nil && m.Kind != nil {
-		return *m.Kind
-	}
-	return GoTest_VOID
-}
-
-func (m *GoTest) GetTable() string {
-	if m != nil && m.Table != nil {
-		return *m.Table
-	}
-	return ""
-}
-
-func (m *GoTest) GetParam() int32 {
-	if m != nil && m.Param != nil {
-		return *m.Param
-	}
-	return 0
-}
-
-func (m *GoTest) GetRequiredField() *GoTestField {
-	if m != nil {
-		return m.RequiredField
-	}
-	return nil
-}
-
-func (m *GoTest) GetRepeatedField() []*GoTestField {
-	if m != nil {
-		return m.RepeatedField
-	}
-	return nil
-}
-
-func (m *GoTest) GetOptionalField() *GoTestField {
-	if m != nil {
-		return m.OptionalField
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_BoolRequired() bool {
-	if m != nil && m.F_BoolRequired != nil {
-		return *m.F_BoolRequired
-	}
-	return false
-}
-
-func (m *GoTest) GetF_Int32Required() int32 {
-	if m != nil && m.F_Int32Required != nil {
-		return *m.F_Int32Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Int64Required() int64 {
-	if m != nil && m.F_Int64Required != nil {
-		return *m.F_Int64Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Fixed32Required() uint32 {
-	if m != nil && m.F_Fixed32Required != nil {
-		return *m.F_Fixed32Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Fixed64Required() uint64 {
-	if m != nil && m.F_Fixed64Required != nil {
-		return *m.F_Fixed64Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Uint32Required() uint32 {
-	if m != nil && m.F_Uint32Required != nil {
-		return *m.F_Uint32Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Uint64Required() uint64 {
-	if m != nil && m.F_Uint64Required != nil {
-		return *m.F_Uint64Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_FloatRequired() float32 {
-	if m != nil && m.F_FloatRequired != nil {
-		return *m.F_FloatRequired
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_DoubleRequired() float64 {
-	if m != nil && m.F_DoubleRequired != nil {
-		return *m.F_DoubleRequired
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_StringRequired() string {
-	if m != nil && m.F_StringRequired != nil {
-		return *m.F_StringRequired
-	}
-	return ""
-}
-
-func (m *GoTest) GetF_BytesRequired() []byte {
-	if m != nil {
-		return m.F_BytesRequired
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Sint32Required() int32 {
-	if m != nil && m.F_Sint32Required != nil {
-		return *m.F_Sint32Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Sint64Required() int64 {
-	if m != nil && m.F_Sint64Required != nil {
-		return *m.F_Sint64Required
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_BoolRepeated() []bool {
-	if m != nil {
-		return m.F_BoolRepeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Int32Repeated() []int32 {
-	if m != nil {
-		return m.F_Int32Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Int64Repeated() []int64 {
-	if m != nil {
-		return m.F_Int64Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Fixed32Repeated() []uint32 {
-	if m != nil {
-		return m.F_Fixed32Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Fixed64Repeated() []uint64 {
-	if m != nil {
-		return m.F_Fixed64Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Uint32Repeated() []uint32 {
-	if m != nil {
-		return m.F_Uint32Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Uint64Repeated() []uint64 {
-	if m != nil {
-		return m.F_Uint64Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_FloatRepeated() []float32 {
-	if m != nil {
-		return m.F_FloatRepeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_DoubleRepeated() []float64 {
-	if m != nil {
-		return m.F_DoubleRepeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_StringRepeated() []string {
-	if m != nil {
-		return m.F_StringRepeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_BytesRepeated() [][]byte {
-	if m != nil {
-		return m.F_BytesRepeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Sint32Repeated() []int32 {
-	if m != nil {
-		return m.F_Sint32Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Sint64Repeated() []int64 {
-	if m != nil {
-		return m.F_Sint64Repeated
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_BoolOptional() bool {
-	if m != nil && m.F_BoolOptional != nil {
-		return *m.F_BoolOptional
-	}
-	return false
-}
-
-func (m *GoTest) GetF_Int32Optional() int32 {
-	if m != nil && m.F_Int32Optional != nil {
-		return *m.F_Int32Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Int64Optional() int64 {
-	if m != nil && m.F_Int64Optional != nil {
-		return *m.F_Int64Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Fixed32Optional() uint32 {
-	if m != nil && m.F_Fixed32Optional != nil {
-		return *m.F_Fixed32Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Fixed64Optional() uint64 {
-	if m != nil && m.F_Fixed64Optional != nil {
-		return *m.F_Fixed64Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Uint32Optional() uint32 {
-	if m != nil && m.F_Uint32Optional != nil {
-		return *m.F_Uint32Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Uint64Optional() uint64 {
-	if m != nil && m.F_Uint64Optional != nil {
-		return *m.F_Uint64Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_FloatOptional() float32 {
-	if m != nil && m.F_FloatOptional != nil {
-		return *m.F_FloatOptional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_DoubleOptional() float64 {
-	if m != nil && m.F_DoubleOptional != nil {
-		return *m.F_DoubleOptional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_StringOptional() string {
-	if m != nil && m.F_StringOptional != nil {
-		return *m.F_StringOptional
-	}
-	return ""
-}
-
-func (m *GoTest) GetF_BytesOptional() []byte {
-	if m != nil {
-		return m.F_BytesOptional
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Sint32Optional() int32 {
-	if m != nil && m.F_Sint32Optional != nil {
-		return *m.F_Sint32Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_Sint64Optional() int64 {
-	if m != nil && m.F_Sint64Optional != nil {
-		return *m.F_Sint64Optional
-	}
-	return 0
-}
-
-func (m *GoTest) GetF_BoolDefaulted() bool {
-	if m != nil && m.F_BoolDefaulted != nil {
-		return *m.F_BoolDefaulted
-	}
-	return Default_GoTest_F_BoolDefaulted
-}
-
-func (m *GoTest) GetF_Int32Defaulted() int32 {
-	if m != nil && m.F_Int32Defaulted != nil {
-		return *m.F_Int32Defaulted
-	}
-	return Default_GoTest_F_Int32Defaulted
-}
-
-func (m *GoTest) GetF_Int64Defaulted() int64 {
-	if m != nil && m.F_Int64Defaulted != nil {
-		return *m.F_Int64Defaulted
-	}
-	return Default_GoTest_F_Int64Defaulted
-}
-
-func (m *GoTest) GetF_Fixed32Defaulted() uint32 {
-	if m != nil && m.F_Fixed32Defaulted != nil {
-		return *m.F_Fixed32Defaulted
-	}
-	return Default_GoTest_F_Fixed32Defaulted
-}
-
-func (m *GoTest) GetF_Fixed64Defaulted() uint64 {
-	if m != nil && m.F_Fixed64Defaulted != nil {
-		return *m.F_Fixed64Defaulted
-	}
-	return Default_GoTest_F_Fixed64Defaulted
-}
-
-func (m *GoTest) GetF_Uint32Defaulted() uint32 {
-	if m != nil && m.F_Uint32Defaulted != nil {
-		return *m.F_Uint32Defaulted
-	}
-	return Default_GoTest_F_Uint32Defaulted
-}
-
-func (m *GoTest) GetF_Uint64Defaulted() uint64 {
-	if m != nil && m.F_Uint64Defaulted != nil {
-		return *m.F_Uint64Defaulted
-	}
-	return Default_GoTest_F_Uint64Defaulted
-}
-
-func (m *GoTest) GetF_FloatDefaulted() float32 {
-	if m != nil && m.F_FloatDefaulted != nil {
-		return *m.F_FloatDefaulted
-	}
-	return Default_GoTest_F_FloatDefaulted
-}
-
-func (m *GoTest) GetF_DoubleDefaulted() float64 {
-	if m != nil && m.F_DoubleDefaulted != nil {
-		return *m.F_DoubleDefaulted
-	}
-	return Default_GoTest_F_DoubleDefaulted
-}
-
-func (m *GoTest) GetF_StringDefaulted() string {
-	if m != nil && m.F_StringDefaulted != nil {
-		return *m.F_StringDefaulted
-	}
-	return Default_GoTest_F_StringDefaulted
-}
-
-func (m *GoTest) GetF_BytesDefaulted() []byte {
-	if m != nil && m.F_BytesDefaulted != nil {
-		return m.F_BytesDefaulted
-	}
-	return append([]byte(nil), Default_GoTest_F_BytesDefaulted...)
-}
-
-func (m *GoTest) GetF_Sint32Defaulted() int32 {
-	if m != nil && m.F_Sint32Defaulted != nil {
-		return *m.F_Sint32Defaulted
-	}
-	return Default_GoTest_F_Sint32Defaulted
-}
-
-func (m *GoTest) GetF_Sint64Defaulted() int64 {
-	if m != nil && m.F_Sint64Defaulted != nil {
-		return *m.F_Sint64Defaulted
-	}
-	return Default_GoTest_F_Sint64Defaulted
-}
-
-func (m *GoTest) GetF_BoolRepeatedPacked() []bool {
-	if m != nil {
-		return m.F_BoolRepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Int32RepeatedPacked() []int32 {
-	if m != nil {
-		return m.F_Int32RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Int64RepeatedPacked() []int64 {
-	if m != nil {
-		return m.F_Int64RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Fixed32RepeatedPacked() []uint32 {
-	if m != nil {
-		return m.F_Fixed32RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Fixed64RepeatedPacked() []uint64 {
-	if m != nil {
-		return m.F_Fixed64RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Uint32RepeatedPacked() []uint32 {
-	if m != nil {
-		return m.F_Uint32RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Uint64RepeatedPacked() []uint64 {
-	if m != nil {
-		return m.F_Uint64RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_FloatRepeatedPacked() []float32 {
-	if m != nil {
-		return m.F_FloatRepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_DoubleRepeatedPacked() []float64 {
-	if m != nil {
-		return m.F_DoubleRepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Sint32RepeatedPacked() []int32 {
-	if m != nil {
-		return m.F_Sint32RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetF_Sint64RepeatedPacked() []int64 {
-	if m != nil {
-		return m.F_Sint64RepeatedPacked
-	}
-	return nil
-}
-
-func (m *GoTest) GetRequiredgroup() *GoTest_RequiredGroup {
-	if m != nil {
-		return m.Requiredgroup
-	}
-	return nil
-}
-
-func (m *GoTest) GetRepeatedgroup() []*GoTest_RepeatedGroup {
-	if m != nil {
-		return m.Repeatedgroup
-	}
-	return nil
-}
-
-func (m *GoTest) GetOptionalgroup() *GoTest_OptionalGroup {
-	if m != nil {
-		return m.Optionalgroup
-	}
-	return nil
-}
-
-// Required, repeated, and optional groups.
-type GoTest_RequiredGroup struct {
-	RequiredField    *string `protobuf:"bytes,71,req,name=RequiredField" json:"RequiredField,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *GoTest_RequiredGroup) Reset()                    { *m = GoTest_RequiredGroup{} }
-func (m *GoTest_RequiredGroup) String() string            { return proto.CompactTextString(m) }
-func (*GoTest_RequiredGroup) ProtoMessage()               {}
-func (*GoTest_RequiredGroup) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 0} }
-
-func (m *GoTest_RequiredGroup) GetRequiredField() string {
-	if m != nil && m.RequiredField != nil {
-		return *m.RequiredField
-	}
-	return ""
-}
-
-type GoTest_RepeatedGroup struct {
-	RequiredField    *string `protobuf:"bytes,81,req,name=RequiredField" json:"RequiredField,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *GoTest_RepeatedGroup) Reset()                    { *m = GoTest_RepeatedGroup{} }
-func (m *GoTest_RepeatedGroup) String() string            { return proto.CompactTextString(m) }
-func (*GoTest_RepeatedGroup) ProtoMessage()               {}
-func (*GoTest_RepeatedGroup) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 1} }
-
-func (m *GoTest_RepeatedGroup) GetRequiredField() string {
-	if m != nil && m.RequiredField != nil {
-		return *m.RequiredField
-	}
-	return ""
-}
-
-type GoTest_OptionalGroup struct {
-	RequiredField    *string `protobuf:"bytes,91,req,name=RequiredField" json:"RequiredField,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *GoTest_OptionalGroup) Reset()                    { *m = GoTest_OptionalGroup{} }
-func (m *GoTest_OptionalGroup) String() string            { return proto.CompactTextString(m) }
-func (*GoTest_OptionalGroup) ProtoMessage()               {}
-func (*GoTest_OptionalGroup) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 2} }
-
-func (m *GoTest_OptionalGroup) GetRequiredField() string {
-	if m != nil && m.RequiredField != nil {
-		return *m.RequiredField
-	}
-	return ""
-}
-
-// For testing a group containing a required field.
-type GoTestRequiredGroupField struct {
-	Group            *GoTestRequiredGroupField_Group `protobuf:"group,1,req,name=Group,json=group" json:"group,omitempty"`
-	XXX_unrecognized []byte                          `json:"-"`
-}
-
-func (m *GoTestRequiredGroupField) Reset()                    { *m = GoTestRequiredGroupField{} }
-func (m *GoTestRequiredGroupField) String() string            { return proto.CompactTextString(m) }
-func (*GoTestRequiredGroupField) ProtoMessage()               {}
-func (*GoTestRequiredGroupField) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
-
-func (m *GoTestRequiredGroupField) GetGroup() *GoTestRequiredGroupField_Group {
-	if m != nil {
-		return m.Group
-	}
-	return nil
-}
-
-type GoTestRequiredGroupField_Group struct {
-	Field            *int32 `protobuf:"varint,2,req,name=Field" json:"Field,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *GoTestRequiredGroupField_Group) Reset()         { *m = GoTestRequiredGroupField_Group{} }
-func (m *GoTestRequiredGroupField_Group) String() string { return proto.CompactTextString(m) }
-func (*GoTestRequiredGroupField_Group) ProtoMessage()    {}
-func (*GoTestRequiredGroupField_Group) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{3, 0}
-}
-
-func (m *GoTestRequiredGroupField_Group) GetField() int32 {
-	if m != nil && m.Field != nil {
-		return *m.Field
-	}
-	return 0
-}
-
-// For testing skipping of unrecognized fields.
-// Numbers are all big, larger than tag numbers in GoTestField,
-// the message used in the corresponding test.
-type GoSkipTest struct {
-	SkipInt32        *int32                `protobuf:"varint,11,req,name=skip_int32,json=skipInt32" json:"skip_int32,omitempty"`
-	SkipFixed32      *uint32               `protobuf:"fixed32,12,req,name=skip_fixed32,json=skipFixed32" json:"skip_fixed32,omitempty"`
-	SkipFixed64      *uint64               `protobuf:"fixed64,13,req,name=skip_fixed64,json=skipFixed64" json:"skip_fixed64,omitempty"`
-	SkipString       *string               `protobuf:"bytes,14,req,name=skip_string,json=skipString" json:"skip_string,omitempty"`
-	Skipgroup        *GoSkipTest_SkipGroup `protobuf:"group,15,req,name=SkipGroup,json=skipgroup" json:"skipgroup,omitempty"`
-	XXX_unrecognized []byte                `json:"-"`
-}
-
-func (m *GoSkipTest) Reset()                    { *m = GoSkipTest{} }
-func (m *GoSkipTest) String() string            { return proto.CompactTextString(m) }
-func (*GoSkipTest) ProtoMessage()               {}
-func (*GoSkipTest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
-
-func (m *GoSkipTest) GetSkipInt32() int32 {
-	if m != nil && m.SkipInt32 != nil {
-		return *m.SkipInt32
-	}
-	return 0
-}
-
-func (m *GoSkipTest) GetSkipFixed32() uint32 {
-	if m != nil && m.SkipFixed32 != nil {
-		return *m.SkipFixed32
-	}
-	return 0
-}
-
-func (m *GoSkipTest) GetSkipFixed64() uint64 {
-	if m != nil && m.SkipFixed64 != nil {
-		return *m.SkipFixed64
-	}
-	return 0
-}
-
-func (m *GoSkipTest) GetSkipString() string {
-	if m != nil && m.SkipString != nil {
-		return *m.SkipString
-	}
-	return ""
-}
-
-func (m *GoSkipTest) GetSkipgroup() *GoSkipTest_SkipGroup {
-	if m != nil {
-		return m.Skipgroup
-	}
-	return nil
-}
-
-type GoSkipTest_SkipGroup struct {
-	GroupInt32       *int32  `protobuf:"varint,16,req,name=group_int32,json=groupInt32" json:"group_int32,omitempty"`
-	GroupString      *string `protobuf:"bytes,17,req,name=group_string,json=groupString" json:"group_string,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *GoSkipTest_SkipGroup) Reset()                    { *m = GoSkipTest_SkipGroup{} }
-func (m *GoSkipTest_SkipGroup) String() string            { return proto.CompactTextString(m) }
-func (*GoSkipTest_SkipGroup) ProtoMessage()               {}
-func (*GoSkipTest_SkipGroup) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4, 0} }
-
-func (m *GoSkipTest_SkipGroup) GetGroupInt32() int32 {
-	if m != nil && m.GroupInt32 != nil {
-		return *m.GroupInt32
-	}
-	return 0
-}
-
-func (m *GoSkipTest_SkipGroup) GetGroupString() string {
-	if m != nil && m.GroupString != nil {
-		return *m.GroupString
-	}
-	return ""
-}
-
-// For testing packed/non-packed decoder switching.
-// A serialized instance of one should be deserializable as the other.
-type NonPackedTest struct {
-	A                []int32 `protobuf:"varint,1,rep,name=a" json:"a,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *NonPackedTest) Reset()                    { *m = NonPackedTest{} }
-func (m *NonPackedTest) String() string            { return proto.CompactTextString(m) }
-func (*NonPackedTest) ProtoMessage()               {}
-func (*NonPackedTest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
-
-func (m *NonPackedTest) GetA() []int32 {
-	if m != nil {
-		return m.A
-	}
-	return nil
-}
-
-type PackedTest struct {
-	B                []int32 `protobuf:"varint,1,rep,packed,name=b" json:"b,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *PackedTest) Reset()                    { *m = PackedTest{} }
-func (m *PackedTest) String() string            { return proto.CompactTextString(m) }
-func (*PackedTest) ProtoMessage()               {}
-func (*PackedTest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
-
-func (m *PackedTest) GetB() []int32 {
-	if m != nil {
-		return m.B
-	}
-	return nil
-}
-
-type MaxTag struct {
-	// Maximum possible tag number.
-	LastField        *string `protobuf:"bytes,536870911,opt,name=last_field,json=lastField" json:"last_field,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *MaxTag) Reset()                    { *m = MaxTag{} }
-func (m *MaxTag) String() string            { return proto.CompactTextString(m) }
-func (*MaxTag) ProtoMessage()               {}
-func (*MaxTag) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
-
-func (m *MaxTag) GetLastField() string {
-	if m != nil && m.LastField != nil {
-		return *m.LastField
-	}
-	return ""
-}
-
-type OldMessage struct {
-	Nested           *OldMessage_Nested `protobuf:"bytes,1,opt,name=nested" json:"nested,omitempty"`
-	Num              *int32             `protobuf:"varint,2,opt,name=num" json:"num,omitempty"`
-	XXX_unrecognized []byte             `json:"-"`
-}
-
-func (m *OldMessage) Reset()                    { *m = OldMessage{} }
-func (m *OldMessage) String() string            { return proto.CompactTextString(m) }
-func (*OldMessage) ProtoMessage()               {}
-func (*OldMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
-
-func (m *OldMessage) GetNested() *OldMessage_Nested {
-	if m != nil {
-		return m.Nested
-	}
-	return nil
-}
-
-func (m *OldMessage) GetNum() int32 {
-	if m != nil && m.Num != nil {
-		return *m.Num
-	}
-	return 0
-}
-
-type OldMessage_Nested struct {
-	Name             *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *OldMessage_Nested) Reset()                    { *m = OldMessage_Nested{} }
-func (m *OldMessage_Nested) String() string            { return proto.CompactTextString(m) }
-func (*OldMessage_Nested) ProtoMessage()               {}
-func (*OldMessage_Nested) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8, 0} }
-
-func (m *OldMessage_Nested) GetName() string {
-	if m != nil && m.Name != nil {
-		return *m.Name
-	}
-	return ""
-}
-
-// NewMessage is wire compatible with OldMessage;
-// imagine it as a future version.
-type NewMessage struct {
-	Nested *NewMessage_Nested `protobuf:"bytes,1,opt,name=nested" json:"nested,omitempty"`
-	// This is an int32 in OldMessage.
-	Num              *int64 `protobuf:"varint,2,opt,name=num" json:"num,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *NewMessage) Reset()                    { *m = NewMessage{} }
-func (m *NewMessage) String() string            { return proto.CompactTextString(m) }
-func (*NewMessage) ProtoMessage()               {}
-func (*NewMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
-
-func (m *NewMessage) GetNested() *NewMessage_Nested {
-	if m != nil {
-		return m.Nested
-	}
-	return nil
-}
-
-func (m *NewMessage) GetNum() int64 {
-	if m != nil && m.Num != nil {
-		return *m.Num
-	}
-	return 0
-}
-
-type NewMessage_Nested struct {
-	Name             *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	FoodGroup        *string `protobuf:"bytes,2,opt,name=food_group,json=foodGroup" json:"food_group,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *NewMessage_Nested) Reset()                    { *m = NewMessage_Nested{} }
-func (m *NewMessage_Nested) String() string            { return proto.CompactTextString(m) }
-func (*NewMessage_Nested) ProtoMessage()               {}
-func (*NewMessage_Nested) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9, 0} }
-
-func (m *NewMessage_Nested) GetName() string {
-	if m != nil && m.Name != nil {
-		return *m.Name
-	}
-	return ""
-}
-
-func (m *NewMessage_Nested) GetFoodGroup() string {
-	if m != nil && m.FoodGroup != nil {
-		return *m.FoodGroup
-	}
-	return ""
-}
-
-type InnerMessage struct {
-	Host             *string `protobuf:"bytes,1,req,name=host" json:"host,omitempty"`
-	Port             *int32  `protobuf:"varint,2,opt,name=port,def=4000" json:"port,omitempty"`
-	Connected        *bool   `protobuf:"varint,3,opt,name=connected" json:"connected,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *InnerMessage) Reset()                    { *m = InnerMessage{} }
-func (m *InnerMessage) String() string            { return proto.CompactTextString(m) }
-func (*InnerMessage) ProtoMessage()               {}
-func (*InnerMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
-
-const Default_InnerMessage_Port int32 = 4000
-
-func (m *InnerMessage) GetHost() string {
-	if m != nil && m.Host != nil {
-		return *m.Host
-	}
-	return ""
-}
-
-func (m *InnerMessage) GetPort() int32 {
-	if m != nil && m.Port != nil {
-		return *m.Port
-	}
-	return Default_InnerMessage_Port
-}
-
-func (m *InnerMessage) GetConnected() bool {
-	if m != nil && m.Connected != nil {
-		return *m.Connected
-	}
-	return false
-}
-
-type OtherMessage struct {
-	Key                          *int64        `protobuf:"varint,1,opt,name=key" json:"key,omitempty"`
-	Value                        []byte        `protobuf:"bytes,2,opt,name=value" json:"value,omitempty"`
-	Weight                       *float32      `protobuf:"fixed32,3,opt,name=weight" json:"weight,omitempty"`
-	Inner                        *InnerMessage `protobuf:"bytes,4,opt,name=inner" json:"inner,omitempty"`
-	proto.XXX_InternalExtensions `json:"-"`
-	XXX_unrecognized             []byte `json:"-"`
-}
-
-func (m *OtherMessage) Reset()                    { *m = OtherMessage{} }
-func (m *OtherMessage) String() string            { return proto.CompactTextString(m) }
-func (*OtherMessage) ProtoMessage()               {}
-func (*OtherMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
-
-var extRange_OtherMessage = []proto.ExtensionRange{
-	{100, 536870911},
-}
-
-func (*OtherMessage) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_OtherMessage
-}
-
-func (m *OtherMessage) GetKey() int64 {
-	if m != nil && m.Key != nil {
-		return *m.Key
-	}
-	return 0
-}
-
-func (m *OtherMessage) GetValue() []byte {
-	if m != nil {
-		return m.Value
-	}
-	return nil
-}
-
-func (m *OtherMessage) GetWeight() float32 {
-	if m != nil && m.Weight != nil {
-		return *m.Weight
-	}
-	return 0
-}
-
-func (m *OtherMessage) GetInner() *InnerMessage {
-	if m != nil {
-		return m.Inner
-	}
-	return nil
-}
-
-type RequiredInnerMessage struct {
-	LeoFinallyWonAnOscar *InnerMessage `protobuf:"bytes,1,req,name=leo_finally_won_an_oscar,json=leoFinallyWonAnOscar" json:"leo_finally_won_an_oscar,omitempty"`
-	XXX_unrecognized     []byte        `json:"-"`
-}
-
-func (m *RequiredInnerMessage) Reset()                    { *m = RequiredInnerMessage{} }
-func (m *RequiredInnerMessage) String() string            { return proto.CompactTextString(m) }
-func (*RequiredInnerMessage) ProtoMessage()               {}
-func (*RequiredInnerMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{12} }
-
-func (m *RequiredInnerMessage) GetLeoFinallyWonAnOscar() *InnerMessage {
-	if m != nil {
-		return m.LeoFinallyWonAnOscar
-	}
-	return nil
-}
-
-type MyMessage struct {
-	Count          *int32                `protobuf:"varint,1,req,name=count" json:"count,omitempty"`
-	Name           *string               `protobuf:"bytes,2,opt,name=name" json:"name,omitempty"`
-	Quote          *string               `protobuf:"bytes,3,opt,name=quote" json:"quote,omitempty"`
-	Pet            []string              `protobuf:"bytes,4,rep,name=pet" json:"pet,omitempty"`
-	Inner          *InnerMessage         `protobuf:"bytes,5,opt,name=inner" json:"inner,omitempty"`
-	Others         []*OtherMessage       `protobuf:"bytes,6,rep,name=others" json:"others,omitempty"`
-	WeMustGoDeeper *RequiredInnerMessage `protobuf:"bytes,13,opt,name=we_must_go_deeper,json=weMustGoDeeper" json:"we_must_go_deeper,omitempty"`
-	RepInner       []*InnerMessage       `protobuf:"bytes,12,rep,name=rep_inner,json=repInner" json:"rep_inner,omitempty"`
-	Bikeshed       *MyMessage_Color      `protobuf:"varint,7,opt,name=bikeshed,enum=testdata.MyMessage_Color" json:"bikeshed,omitempty"`
-	Somegroup      *MyMessage_SomeGroup  `protobuf:"group,8,opt,name=SomeGroup,json=somegroup" json:"somegroup,omitempty"`
-	// This field becomes [][]byte in the generated code.
-	RepBytes                     [][]byte `protobuf:"bytes,10,rep,name=rep_bytes,json=repBytes" json:"rep_bytes,omitempty"`
-	Bigfloat                     *float64 `protobuf:"fixed64,11,opt,name=bigfloat" json:"bigfloat,omitempty"`
-	proto.XXX_InternalExtensions `json:"-"`
-	XXX_unrecognized             []byte `json:"-"`
-}
-
-func (m *MyMessage) Reset()                    { *m = MyMessage{} }
-func (m *MyMessage) String() string            { return proto.CompactTextString(m) }
-func (*MyMessage) ProtoMessage()               {}
-func (*MyMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{13} }
-
-var extRange_MyMessage = []proto.ExtensionRange{
-	{100, 536870911},
-}
-
-func (*MyMessage) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_MyMessage
-}
-
-func (m *MyMessage) GetCount() int32 {
-	if m != nil && m.Count != nil {
-		return *m.Count
-	}
-	return 0
-}
-
-func (m *MyMessage) GetName() string {
-	if m != nil && m.Name != nil {
-		return *m.Name
-	}
-	return ""
-}
-
-func (m *MyMessage) GetQuote() string {
-	if m != nil && m.Quote != nil {
-		return *m.Quote
-	}
-	return ""
-}
-
-func (m *MyMessage) GetPet() []string {
-	if m != nil {
-		return m.Pet
-	}
-	return nil
-}
-
-func (m *MyMessage) GetInner() *InnerMessage {
-	if m != nil {
-		return m.Inner
-	}
-	return nil
-}
-
-func (m *MyMessage) GetOthers() []*OtherMessage {
-	if m != nil {
-		return m.Others
-	}
-	return nil
-}
-
-func (m *MyMessage) GetWeMustGoDeeper() *RequiredInnerMessage {
-	if m != nil {
-		return m.WeMustGoDeeper
-	}
-	return nil
-}
-
-func (m *MyMessage) GetRepInner() []*InnerMessage {
-	if m != nil {
-		return m.RepInner
-	}
-	return nil
-}
-
-func (m *MyMessage) GetBikeshed() MyMessage_Color {
-	if m != nil && m.Bikeshed != nil {
-		return *m.Bikeshed
-	}
-	return MyMessage_RED
-}
-
-func (m *MyMessage) GetSomegroup() *MyMessage_SomeGroup {
-	if m != nil {
-		return m.Somegroup
-	}
-	return nil
-}
-
-func (m *MyMessage) GetRepBytes() [][]byte {
-	if m != nil {
-		return m.RepBytes
-	}
-	return nil
-}
-
-func (m *MyMessage) GetBigfloat() float64 {
-	if m != nil && m.Bigfloat != nil {
-		return *m.Bigfloat
-	}
-	return 0
-}
-
-type MyMessage_SomeGroup struct {
-	GroupField       *int32 `protobuf:"varint,9,opt,name=group_field,json=groupField" json:"group_field,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *MyMessage_SomeGroup) Reset()                    { *m = MyMessage_SomeGroup{} }
-func (m *MyMessage_SomeGroup) String() string            { return proto.CompactTextString(m) }
-func (*MyMessage_SomeGroup) ProtoMessage()               {}
-func (*MyMessage_SomeGroup) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{13, 0} }
-
-func (m *MyMessage_SomeGroup) GetGroupField() int32 {
-	if m != nil && m.GroupField != nil {
-		return *m.GroupField
-	}
-	return 0
-}
-
-type Ext struct {
-	Data             *string `protobuf:"bytes,1,opt,name=data" json:"data,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *Ext) Reset()                    { *m = Ext{} }
-func (m *Ext) String() string            { return proto.CompactTextString(m) }
-func (*Ext) ProtoMessage()               {}
-func (*Ext) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{14} }
-
-func (m *Ext) GetData() string {
-	if m != nil && m.Data != nil {
-		return *m.Data
-	}
-	return ""
-}
-
-var E_Ext_More = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessage)(nil),
-	ExtensionType: (*Ext)(nil),
-	Field:         103,
-	Name:          "testdata.Ext.more",
-	Tag:           "bytes,103,opt,name=more",
-	Filename:      "test.proto",
-}
-
-var E_Ext_Text = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessage)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         104,
-	Name:          "testdata.Ext.text",
-	Tag:           "bytes,104,opt,name=text",
-	Filename:      "test.proto",
-}
-
-var E_Ext_Number = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessage)(nil),
-	ExtensionType: (*int32)(nil),
-	Field:         105,
-	Name:          "testdata.Ext.number",
-	Tag:           "varint,105,opt,name=number",
-	Filename:      "test.proto",
-}
-
-type ComplexExtension struct {
-	First            *int32  `protobuf:"varint,1,opt,name=first" json:"first,omitempty"`
-	Second           *int32  `protobuf:"varint,2,opt,name=second" json:"second,omitempty"`
-	Third            []int32 `protobuf:"varint,3,rep,name=third" json:"third,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *ComplexExtension) Reset()                    { *m = ComplexExtension{} }
-func (m *ComplexExtension) String() string            { return proto.CompactTextString(m) }
-func (*ComplexExtension) ProtoMessage()               {}
-func (*ComplexExtension) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{15} }
-
-func (m *ComplexExtension) GetFirst() int32 {
-	if m != nil && m.First != nil {
-		return *m.First
-	}
-	return 0
-}
-
-func (m *ComplexExtension) GetSecond() int32 {
-	if m != nil && m.Second != nil {
-		return *m.Second
-	}
-	return 0
-}
-
-func (m *ComplexExtension) GetThird() []int32 {
-	if m != nil {
-		return m.Third
-	}
-	return nil
-}
-
-type DefaultsMessage struct {
-	proto.XXX_InternalExtensions `json:"-"`
-	XXX_unrecognized             []byte `json:"-"`
-}
-
-func (m *DefaultsMessage) Reset()                    { *m = DefaultsMessage{} }
-func (m *DefaultsMessage) String() string            { return proto.CompactTextString(m) }
-func (*DefaultsMessage) ProtoMessage()               {}
-func (*DefaultsMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{16} }
-
-var extRange_DefaultsMessage = []proto.ExtensionRange{
-	{100, 536870911},
-}
-
-func (*DefaultsMessage) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_DefaultsMessage
-}
-
-type MyMessageSet struct {
-	proto.XXX_InternalExtensions `json:"-"`
-	XXX_unrecognized             []byte `json:"-"`
-}
-
-func (m *MyMessageSet) Reset()                    { *m = MyMessageSet{} }
-func (m *MyMessageSet) String() string            { return proto.CompactTextString(m) }
-func (*MyMessageSet) ProtoMessage()               {}
-func (*MyMessageSet) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{17} }
-
-func (m *MyMessageSet) Marshal() ([]byte, error) {
-	return proto.MarshalMessageSet(&m.XXX_InternalExtensions)
-}
-func (m *MyMessageSet) Unmarshal(buf []byte) error {
-	return proto.UnmarshalMessageSet(buf, &m.XXX_InternalExtensions)
-}
-func (m *MyMessageSet) MarshalJSON() ([]byte, error) {
-	return proto.MarshalMessageSetJSON(&m.XXX_InternalExtensions)
-}
-func (m *MyMessageSet) UnmarshalJSON(buf []byte) error {
-	return proto.UnmarshalMessageSetJSON(buf, &m.XXX_InternalExtensions)
-}
-
-// ensure MyMessageSet satisfies proto.Marshaler and proto.Unmarshaler
-var _ proto.Marshaler = (*MyMessageSet)(nil)
-var _ proto.Unmarshaler = (*MyMessageSet)(nil)
-
-var extRange_MyMessageSet = []proto.ExtensionRange{
-	{100, 2147483646},
-}
-
-func (*MyMessageSet) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_MyMessageSet
-}
-
-type Empty struct {
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *Empty) Reset()                    { *m = Empty{} }
-func (m *Empty) String() string            { return proto.CompactTextString(m) }
-func (*Empty) ProtoMessage()               {}
-func (*Empty) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} }
-
-type MessageList struct {
-	Message          []*MessageList_Message `protobuf:"group,1,rep,name=Message,json=message" json:"message,omitempty"`
-	XXX_unrecognized []byte                 `json:"-"`
-}
-
-func (m *MessageList) Reset()                    { *m = MessageList{} }
-func (m *MessageList) String() string            { return proto.CompactTextString(m) }
-func (*MessageList) ProtoMessage()               {}
-func (*MessageList) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19} }
-
-func (m *MessageList) GetMessage() []*MessageList_Message {
-	if m != nil {
-		return m.Message
-	}
-	return nil
-}
-
-type MessageList_Message struct {
-	Name             *string `protobuf:"bytes,2,req,name=name" json:"name,omitempty"`
-	Count            *int32  `protobuf:"varint,3,req,name=count" json:"count,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *MessageList_Message) Reset()                    { *m = MessageList_Message{} }
-func (m *MessageList_Message) String() string            { return proto.CompactTextString(m) }
-func (*MessageList_Message) ProtoMessage()               {}
-func (*MessageList_Message) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19, 0} }
-
-func (m *MessageList_Message) GetName() string {
-	if m != nil && m.Name != nil {
-		return *m.Name
-	}
-	return ""
-}
-
-func (m *MessageList_Message) GetCount() int32 {
-	if m != nil && m.Count != nil {
-		return *m.Count
-	}
-	return 0
-}
-
-type Strings struct {
-	StringField      *string `protobuf:"bytes,1,opt,name=string_field,json=stringField" json:"string_field,omitempty"`
-	BytesField       []byte  `protobuf:"bytes,2,opt,name=bytes_field,json=bytesField" json:"bytes_field,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *Strings) Reset()                    { *m = Strings{} }
-func (m *Strings) String() string            { return proto.CompactTextString(m) }
-func (*Strings) ProtoMessage()               {}
-func (*Strings) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{20} }
-
-func (m *Strings) GetStringField() string {
-	if m != nil && m.StringField != nil {
-		return *m.StringField
-	}
-	return ""
-}
-
-func (m *Strings) GetBytesField() []byte {
-	if m != nil {
-		return m.BytesField
-	}
-	return nil
-}
-
-type Defaults struct {
-	// Default-valued fields of all basic types.
-	// Same as GoTest, but copied here to make testing easier.
-	F_Bool    *bool           `protobuf:"varint,1,opt,name=F_Bool,json=FBool,def=1" json:"F_Bool,omitempty"`
-	F_Int32   *int32          `protobuf:"varint,2,opt,name=F_Int32,json=FInt32,def=32" json:"F_Int32,omitempty"`
-	F_Int64   *int64          `protobuf:"varint,3,opt,name=F_Int64,json=FInt64,def=64" json:"F_Int64,omitempty"`
-	F_Fixed32 *uint32         `protobuf:"fixed32,4,opt,name=F_Fixed32,json=FFixed32,def=320" json:"F_Fixed32,omitempty"`
-	F_Fixed64 *uint64         `protobuf:"fixed64,5,opt,name=F_Fixed64,json=FFixed64,def=640" json:"F_Fixed64,omitempty"`
-	F_Uint32  *uint32         `protobuf:"varint,6,opt,name=F_Uint32,json=FUint32,def=3200" json:"F_Uint32,omitempty"`
-	F_Uint64  *uint64         `protobuf:"varint,7,opt,name=F_Uint64,json=FUint64,def=6400" json:"F_Uint64,omitempty"`
-	F_Float   *float32        `protobuf:"fixed32,8,opt,name=F_Float,json=FFloat,def=314159" json:"F_Float,omitempty"`
-	F_Double  *float64        `protobuf:"fixed64,9,opt,name=F_Double,json=FDouble,def=271828" json:"F_Double,omitempty"`
-	F_String  *string         `protobuf:"bytes,10,opt,name=F_String,json=FString,def=hello, \"world!\"\n" json:"F_String,omitempty"`
-	F_Bytes   []byte          `protobuf:"bytes,11,opt,name=F_Bytes,json=FBytes,def=Bignose" json:"F_Bytes,omitempty"`
-	F_Sint32  *int32          `protobuf:"zigzag32,12,opt,name=F_Sint32,json=FSint32,def=-32" json:"F_Sint32,omitempty"`
-	F_Sint64  *int64          `protobuf:"zigzag64,13,opt,name=F_Sint64,json=FSint64,def=-64" json:"F_Sint64,omitempty"`
-	F_Enum    *Defaults_Color `protobuf:"varint,14,opt,name=F_Enum,json=FEnum,enum=testdata.Defaults_Color,def=1" json:"F_Enum,omitempty"`
-	// More fields with crazy defaults.
-	F_Pinf *float32 `protobuf:"fixed32,15,opt,name=F_Pinf,json=FPinf,def=inf" json:"F_Pinf,omitempty"`
-	F_Ninf *float32 `protobuf:"fixed32,16,opt,name=F_Ninf,json=FNinf,def=-inf" json:"F_Ninf,omitempty"`
-	F_Nan  *float32 `protobuf:"fixed32,17,opt,name=F_Nan,json=FNan,def=nan" json:"F_Nan,omitempty"`
-	// Sub-message.
-	Sub *SubDefaults `protobuf:"bytes,18,opt,name=sub" json:"sub,omitempty"`
-	// Redundant but explicit defaults.
-	StrZero          *string `protobuf:"bytes,19,opt,name=str_zero,json=strZero,def=" json:"str_zero,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *Defaults) Reset()                    { *m = Defaults{} }
-func (m *Defaults) String() string            { return proto.CompactTextString(m) }
-func (*Defaults) ProtoMessage()               {}
-func (*Defaults) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{21} }
-
-const Default_Defaults_F_Bool bool = true
-const Default_Defaults_F_Int32 int32 = 32
-const Default_Defaults_F_Int64 int64 = 64
-const Default_Defaults_F_Fixed32 uint32 = 320
-const Default_Defaults_F_Fixed64 uint64 = 640
-const Default_Defaults_F_Uint32 uint32 = 3200
-const Default_Defaults_F_Uint64 uint64 = 6400
-const Default_Defaults_F_Float float32 = 314159
-const Default_Defaults_F_Double float64 = 271828
-const Default_Defaults_F_String string = "hello, \"world!\"\n"
-
-var Default_Defaults_F_Bytes []byte = []byte("Bignose")
-
-const Default_Defaults_F_Sint32 int32 = -32
-const Default_Defaults_F_Sint64 int64 = -64
-const Default_Defaults_F_Enum Defaults_Color = Defaults_GREEN
-
-var Default_Defaults_F_Pinf float32 = float32(math.Inf(1))
-var Default_Defaults_F_Ninf float32 = float32(math.Inf(-1))
-var Default_Defaults_F_Nan float32 = float32(math.NaN())
-
-func (m *Defaults) GetF_Bool() bool {
-	if m != nil && m.F_Bool != nil {
-		return *m.F_Bool
-	}
-	return Default_Defaults_F_Bool
-}
-
-func (m *Defaults) GetF_Int32() int32 {
-	if m != nil && m.F_Int32 != nil {
-		return *m.F_Int32
-	}
-	return Default_Defaults_F_Int32
-}
-
-func (m *Defaults) GetF_Int64() int64 {
-	if m != nil && m.F_Int64 != nil {
-		return *m.F_Int64
-	}
-	return Default_Defaults_F_Int64
-}
-
-func (m *Defaults) GetF_Fixed32() uint32 {
-	if m != nil && m.F_Fixed32 != nil {
-		return *m.F_Fixed32
-	}
-	return Default_Defaults_F_Fixed32
-}
-
-func (m *Defaults) GetF_Fixed64() uint64 {
-	if m != nil && m.F_Fixed64 != nil {
-		return *m.F_Fixed64
-	}
-	return Default_Defaults_F_Fixed64
-}
-
-func (m *Defaults) GetF_Uint32() uint32 {
-	if m != nil && m.F_Uint32 != nil {
-		return *m.F_Uint32
-	}
-	return Default_Defaults_F_Uint32
-}
-
-func (m *Defaults) GetF_Uint64() uint64 {
-	if m != nil && m.F_Uint64 != nil {
-		return *m.F_Uint64
-	}
-	return Default_Defaults_F_Uint64
-}
-
-func (m *Defaults) GetF_Float() float32 {
-	if m != nil && m.F_Float != nil {
-		return *m.F_Float
-	}
-	return Default_Defaults_F_Float
-}
-
-func (m *Defaults) GetF_Double() float64 {
-	if m != nil && m.F_Double != nil {
-		return *m.F_Double
-	}
-	return Default_Defaults_F_Double
-}
-
-func (m *Defaults) GetF_String() string {
-	if m != nil && m.F_String != nil {
-		return *m.F_String
-	}
-	return Default_Defaults_F_String
-}
-
-func (m *Defaults) GetF_Bytes() []byte {
-	if m != nil && m.F_Bytes != nil {
-		return m.F_Bytes
-	}
-	return append([]byte(nil), Default_Defaults_F_Bytes...)
-}
-
-func (m *Defaults) GetF_Sint32() int32 {
-	if m != nil && m.F_Sint32 != nil {
-		return *m.F_Sint32
-	}
-	return Default_Defaults_F_Sint32
-}
-
-func (m *Defaults) GetF_Sint64() int64 {
-	if m != nil && m.F_Sint64 != nil {
-		return *m.F_Sint64
-	}
-	return Default_Defaults_F_Sint64
-}
-
-func (m *Defaults) GetF_Enum() Defaults_Color {
-	if m != nil && m.F_Enum != nil {
-		return *m.F_Enum
-	}
-	return Default_Defaults_F_Enum
-}
-
-func (m *Defaults) GetF_Pinf() float32 {
-	if m != nil && m.F_Pinf != nil {
-		return *m.F_Pinf
-	}
-	return Default_Defaults_F_Pinf
-}
-
-func (m *Defaults) GetF_Ninf() float32 {
-	if m != nil && m.F_Ninf != nil {
-		return *m.F_Ninf
-	}
-	return Default_Defaults_F_Ninf
-}
-
-func (m *Defaults) GetF_Nan() float32 {
-	if m != nil && m.F_Nan != nil {
-		return *m.F_Nan
-	}
-	return Default_Defaults_F_Nan
-}
-
-func (m *Defaults) GetSub() *SubDefaults {
-	if m != nil {
-		return m.Sub
-	}
-	return nil
-}
-
-func (m *Defaults) GetStrZero() string {
-	if m != nil && m.StrZero != nil {
-		return *m.StrZero
-	}
-	return ""
-}
-
-type SubDefaults struct {
-	N                *int64 `protobuf:"varint,1,opt,name=n,def=7" json:"n,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *SubDefaults) Reset()                    { *m = SubDefaults{} }
-func (m *SubDefaults) String() string            { return proto.CompactTextString(m) }
-func (*SubDefaults) ProtoMessage()               {}
-func (*SubDefaults) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{22} }
-
-const Default_SubDefaults_N int64 = 7
-
-func (m *SubDefaults) GetN() int64 {
-	if m != nil && m.N != nil {
-		return *m.N
-	}
-	return Default_SubDefaults_N
-}
-
-type RepeatedEnum struct {
-	Color            []RepeatedEnum_Color `protobuf:"varint,1,rep,name=color,enum=testdata.RepeatedEnum_Color" json:"color,omitempty"`
-	XXX_unrecognized []byte               `json:"-"`
-}
-
-func (m *RepeatedEnum) Reset()                    { *m = RepeatedEnum{} }
-func (m *RepeatedEnum) String() string            { return proto.CompactTextString(m) }
-func (*RepeatedEnum) ProtoMessage()               {}
-func (*RepeatedEnum) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{23} }
-
-func (m *RepeatedEnum) GetColor() []RepeatedEnum_Color {
-	if m != nil {
-		return m.Color
-	}
-	return nil
-}
-
-type MoreRepeated struct {
-	Bools            []bool   `protobuf:"varint,1,rep,name=bools" json:"bools,omitempty"`
-	BoolsPacked      []bool   `protobuf:"varint,2,rep,packed,name=bools_packed,json=boolsPacked" json:"bools_packed,omitempty"`
-	Ints             []int32  `protobuf:"varint,3,rep,name=ints" json:"ints,omitempty"`
-	IntsPacked       []int32  `protobuf:"varint,4,rep,packed,name=ints_packed,json=intsPacked" json:"ints_packed,omitempty"`
-	Int64SPacked     []int64  `protobuf:"varint,7,rep,packed,name=int64s_packed,json=int64sPacked" json:"int64s_packed,omitempty"`
-	Strings          []string `protobuf:"bytes,5,rep,name=strings" json:"strings,omitempty"`
-	Fixeds           []uint32 `protobuf:"fixed32,6,rep,name=fixeds" json:"fixeds,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
-}
-
-func (m *MoreRepeated) Reset()                    { *m = MoreRepeated{} }
-func (m *MoreRepeated) String() string            { return proto.CompactTextString(m) }
-func (*MoreRepeated) ProtoMessage()               {}
-func (*MoreRepeated) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{24} }
-
-func (m *MoreRepeated) GetBools() []bool {
-	if m != nil {
-		return m.Bools
-	}
-	return nil
-}
-
-func (m *MoreRepeated) GetBoolsPacked() []bool {
-	if m != nil {
-		return m.BoolsPacked
-	}
-	return nil
-}
-
-func (m *MoreRepeated) GetInts() []int32 {
-	if m != nil {
-		return m.Ints
-	}
-	return nil
-}
-
-func (m *MoreRepeated) GetIntsPacked() []int32 {
-	if m != nil {
-		return m.IntsPacked
-	}
-	return nil
-}
-
-func (m *MoreRepeated) GetInt64SPacked() []int64 {
-	if m != nil {
-		return m.Int64SPacked
-	}
-	return nil
-}
-
-func (m *MoreRepeated) GetStrings() []string {
-	if m != nil {
-		return m.Strings
-	}
-	return nil
-}
-
-func (m *MoreRepeated) GetFixeds() []uint32 {
-	if m != nil {
-		return m.Fixeds
-	}
-	return nil
-}
-
-type GroupOld struct {
-	G                *GroupOld_G `protobuf:"group,101,opt,name=G,json=g" json:"g,omitempty"`
-	XXX_unrecognized []byte      `json:"-"`
-}
-
-func (m *GroupOld) Reset()                    { *m = GroupOld{} }
-func (m *GroupOld) String() string            { return proto.CompactTextString(m) }
-func (*GroupOld) ProtoMessage()               {}
-func (*GroupOld) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25} }
-
-func (m *GroupOld) GetG() *GroupOld_G {
-	if m != nil {
-		return m.G
-	}
-	return nil
-}
-
-type GroupOld_G struct {
-	X                *int32 `protobuf:"varint,2,opt,name=x" json:"x,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *GroupOld_G) Reset()                    { *m = GroupOld_G{} }
-func (m *GroupOld_G) String() string            { return proto.CompactTextString(m) }
-func (*GroupOld_G) ProtoMessage()               {}
-func (*GroupOld_G) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{25, 0} }
-
-func (m *GroupOld_G) GetX() int32 {
-	if m != nil && m.X != nil {
-		return *m.X
-	}
-	return 0
-}
-
-type GroupNew struct {
-	G                *GroupNew_G `protobuf:"group,101,opt,name=G,json=g" json:"g,omitempty"`
-	XXX_unrecognized []byte      `json:"-"`
-}
-
-func (m *GroupNew) Reset()                    { *m = GroupNew{} }
-func (m *GroupNew) String() string            { return proto.CompactTextString(m) }
-func (*GroupNew) ProtoMessage()               {}
-func (*GroupNew) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26} }
-
-func (m *GroupNew) GetG() *GroupNew_G {
-	if m != nil {
-		return m.G
-	}
-	return nil
-}
-
-type GroupNew_G struct {
-	X                *int32 `protobuf:"varint,2,opt,name=x" json:"x,omitempty"`
-	Y                *int32 `protobuf:"varint,3,opt,name=y" json:"y,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *GroupNew_G) Reset()                    { *m = GroupNew_G{} }
-func (m *GroupNew_G) String() string            { return proto.CompactTextString(m) }
-func (*GroupNew_G) ProtoMessage()               {}
-func (*GroupNew_G) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{26, 0} }
-
-func (m *GroupNew_G) GetX() int32 {
-	if m != nil && m.X != nil {
-		return *m.X
-	}
-	return 0
-}
-
-func (m *GroupNew_G) GetY() int32 {
-	if m != nil && m.Y != nil {
-		return *m.Y
-	}
-	return 0
-}
-
-type FloatingPoint struct {
-	F                *float64 `protobuf:"fixed64,1,req,name=f" json:"f,omitempty"`
-	Exact            *bool    `protobuf:"varint,2,opt,name=exact" json:"exact,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
-}
-
-func (m *FloatingPoint) Reset()                    { *m = FloatingPoint{} }
-func (m *FloatingPoint) String() string            { return proto.CompactTextString(m) }
-func (*FloatingPoint) ProtoMessage()               {}
-func (*FloatingPoint) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{27} }
-
-func (m *FloatingPoint) GetF() float64 {
-	if m != nil && m.F != nil {
-		return *m.F
-	}
-	return 0
-}
-
-func (m *FloatingPoint) GetExact() bool {
-	if m != nil && m.Exact != nil {
-		return *m.Exact
-	}
-	return false
-}
-
-type MessageWithMap struct {
-	NameMapping      map[int32]string         `protobuf:"bytes,1,rep,name=name_mapping,json=nameMapping" json:"name_mapping,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	MsgMapping       map[int64]*FloatingPoint `protobuf:"bytes,2,rep,name=msg_mapping,json=msgMapping" json:"msg_mapping,omitempty" protobuf_key:"zigzag64,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	ByteMapping      map[bool][]byte          `protobuf:"bytes,3,rep,name=byte_mapping,json=byteMapping" json:"byte_mapping,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	StrToStr         map[string]string        `protobuf:"bytes,4,rep,name=str_to_str,json=strToStr" json:"str_to_str,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	XXX_unrecognized []byte                   `json:"-"`
-}
-
-func (m *MessageWithMap) Reset()                    { *m = MessageWithMap{} }
-func (m *MessageWithMap) String() string            { return proto.CompactTextString(m) }
-func (*MessageWithMap) ProtoMessage()               {}
-func (*MessageWithMap) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{28} }
-
-func (m *MessageWithMap) GetNameMapping() map[int32]string {
-	if m != nil {
-		return m.NameMapping
-	}
-	return nil
-}
-
-func (m *MessageWithMap) GetMsgMapping() map[int64]*FloatingPoint {
-	if m != nil {
-		return m.MsgMapping
-	}
-	return nil
-}
-
-func (m *MessageWithMap) GetByteMapping() map[bool][]byte {
-	if m != nil {
-		return m.ByteMapping
-	}
-	return nil
-}
-
-func (m *MessageWithMap) GetStrToStr() map[string]string {
-	if m != nil {
-		return m.StrToStr
-	}
-	return nil
-}
-
-type Oneof struct {
-	// Types that are valid to be assigned to Union:
-	//	*Oneof_F_Bool
-	//	*Oneof_F_Int32
-	//	*Oneof_F_Int64
-	//	*Oneof_F_Fixed32
-	//	*Oneof_F_Fixed64
-	//	*Oneof_F_Uint32
-	//	*Oneof_F_Uint64
-	//	*Oneof_F_Float
-	//	*Oneof_F_Double
-	//	*Oneof_F_String
-	//	*Oneof_F_Bytes
-	//	*Oneof_F_Sint32
-	//	*Oneof_F_Sint64
-	//	*Oneof_F_Enum
-	//	*Oneof_F_Message
-	//	*Oneof_FGroup
-	//	*Oneof_F_Largest_Tag
-	Union isOneof_Union `protobuf_oneof:"union"`
-	// Types that are valid to be assigned to Tormato:
-	//	*Oneof_Value
-	Tormato          isOneof_Tormato `protobuf_oneof:"tormato"`
-	XXX_unrecognized []byte          `json:"-"`
-}
-
-func (m *Oneof) Reset()                    { *m = Oneof{} }
-func (m *Oneof) String() string            { return proto.CompactTextString(m) }
-func (*Oneof) ProtoMessage()               {}
-func (*Oneof) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29} }
-
-type isOneof_Union interface {
-	isOneof_Union()
-}
-type isOneof_Tormato interface {
-	isOneof_Tormato()
-}
-
-type Oneof_F_Bool struct {
-	F_Bool bool `protobuf:"varint,1,opt,name=F_Bool,json=FBool,oneof"`
-}
-type Oneof_F_Int32 struct {
-	F_Int32 int32 `protobuf:"varint,2,opt,name=F_Int32,json=FInt32,oneof"`
-}
-type Oneof_F_Int64 struct {
-	F_Int64 int64 `protobuf:"varint,3,opt,name=F_Int64,json=FInt64,oneof"`
-}
-type Oneof_F_Fixed32 struct {
-	F_Fixed32 uint32 `protobuf:"fixed32,4,opt,name=F_Fixed32,json=FFixed32,oneof"`
-}
-type Oneof_F_Fixed64 struct {
-	F_Fixed64 uint64 `protobuf:"fixed64,5,opt,name=F_Fixed64,json=FFixed64,oneof"`
-}
-type Oneof_F_Uint32 struct {
-	F_Uint32 uint32 `protobuf:"varint,6,opt,name=F_Uint32,json=FUint32,oneof"`
-}
-type Oneof_F_Uint64 struct {
-	F_Uint64 uint64 `protobuf:"varint,7,opt,name=F_Uint64,json=FUint64,oneof"`
-}
-type Oneof_F_Float struct {
-	F_Float float32 `protobuf:"fixed32,8,opt,name=F_Float,json=FFloat,oneof"`
-}
-type Oneof_F_Double struct {
-	F_Double float64 `protobuf:"fixed64,9,opt,name=F_Double,json=FDouble,oneof"`
-}
-type Oneof_F_String struct {
-	F_String string `protobuf:"bytes,10,opt,name=F_String,json=FString,oneof"`
-}
-type Oneof_F_Bytes struct {
-	F_Bytes []byte `protobuf:"bytes,11,opt,name=F_Bytes,json=FBytes,oneof"`
-}
-type Oneof_F_Sint32 struct {
-	F_Sint32 int32 `protobuf:"zigzag32,12,opt,name=F_Sint32,json=FSint32,oneof"`
-}
-type Oneof_F_Sint64 struct {
-	F_Sint64 int64 `protobuf:"zigzag64,13,opt,name=F_Sint64,json=FSint64,oneof"`
-}
-type Oneof_F_Enum struct {
-	F_Enum MyMessage_Color `protobuf:"varint,14,opt,name=F_Enum,json=FEnum,enum=testdata.MyMessage_Color,oneof"`
-}
-type Oneof_F_Message struct {
-	F_Message *GoTestField `protobuf:"bytes,15,opt,name=F_Message,json=FMessage,oneof"`
-}
-type Oneof_FGroup struct {
-	FGroup *Oneof_F_Group `protobuf:"group,16,opt,name=F_Group,json=fGroup,oneof"`
-}
-type Oneof_F_Largest_Tag struct {
-	F_Largest_Tag int32 `protobuf:"varint,536870911,opt,name=F_Largest_Tag,json=FLargestTag,oneof"`
-}
-type Oneof_Value struct {
-	Value int32 `protobuf:"varint,100,opt,name=value,oneof"`
-}
-
-func (*Oneof_F_Bool) isOneof_Union()        {}
-func (*Oneof_F_Int32) isOneof_Union()       {}
-func (*Oneof_F_Int64) isOneof_Union()       {}
-func (*Oneof_F_Fixed32) isOneof_Union()     {}
-func (*Oneof_F_Fixed64) isOneof_Union()     {}
-func (*Oneof_F_Uint32) isOneof_Union()      {}
-func (*Oneof_F_Uint64) isOneof_Union()      {}
-func (*Oneof_F_Float) isOneof_Union()       {}
-func (*Oneof_F_Double) isOneof_Union()      {}
-func (*Oneof_F_String) isOneof_Union()      {}
-func (*Oneof_F_Bytes) isOneof_Union()       {}
-func (*Oneof_F_Sint32) isOneof_Union()      {}
-func (*Oneof_F_Sint64) isOneof_Union()      {}
-func (*Oneof_F_Enum) isOneof_Union()        {}
-func (*Oneof_F_Message) isOneof_Union()     {}
-func (*Oneof_FGroup) isOneof_Union()        {}
-func (*Oneof_F_Largest_Tag) isOneof_Union() {}
-func (*Oneof_Value) isOneof_Tormato()       {}
-
-func (m *Oneof) GetUnion() isOneof_Union {
-	if m != nil {
-		return m.Union
-	}
-	return nil
-}
-func (m *Oneof) GetTormato() isOneof_Tormato {
-	if m != nil {
-		return m.Tormato
-	}
-	return nil
-}
-
-func (m *Oneof) GetF_Bool() bool {
-	if x, ok := m.GetUnion().(*Oneof_F_Bool); ok {
-		return x.F_Bool
-	}
-	return false
-}
-
-func (m *Oneof) GetF_Int32() int32 {
-	if x, ok := m.GetUnion().(*Oneof_F_Int32); ok {
-		return x.F_Int32
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Int64() int64 {
-	if x, ok := m.GetUnion().(*Oneof_F_Int64); ok {
-		return x.F_Int64
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Fixed32() uint32 {
-	if x, ok := m.GetUnion().(*Oneof_F_Fixed32); ok {
-		return x.F_Fixed32
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Fixed64() uint64 {
-	if x, ok := m.GetUnion().(*Oneof_F_Fixed64); ok {
-		return x.F_Fixed64
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Uint32() uint32 {
-	if x, ok := m.GetUnion().(*Oneof_F_Uint32); ok {
-		return x.F_Uint32
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Uint64() uint64 {
-	if x, ok := m.GetUnion().(*Oneof_F_Uint64); ok {
-		return x.F_Uint64
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Float() float32 {
-	if x, ok := m.GetUnion().(*Oneof_F_Float); ok {
-		return x.F_Float
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Double() float64 {
-	if x, ok := m.GetUnion().(*Oneof_F_Double); ok {
-		return x.F_Double
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_String() string {
-	if x, ok := m.GetUnion().(*Oneof_F_String); ok {
-		return x.F_String
-	}
-	return ""
-}
-
-func (m *Oneof) GetF_Bytes() []byte {
-	if x, ok := m.GetUnion().(*Oneof_F_Bytes); ok {
-		return x.F_Bytes
-	}
-	return nil
-}
-
-func (m *Oneof) GetF_Sint32() int32 {
-	if x, ok := m.GetUnion().(*Oneof_F_Sint32); ok {
-		return x.F_Sint32
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Sint64() int64 {
-	if x, ok := m.GetUnion().(*Oneof_F_Sint64); ok {
-		return x.F_Sint64
-	}
-	return 0
-}
-
-func (m *Oneof) GetF_Enum() MyMessage_Color {
-	if x, ok := m.GetUnion().(*Oneof_F_Enum); ok {
-		return x.F_Enum
-	}
-	return MyMessage_RED
-}
-
-func (m *Oneof) GetF_Message() *GoTestField {
-	if x, ok := m.GetUnion().(*Oneof_F_Message); ok {
-		return x.F_Message
-	}
-	return nil
-}
-
-func (m *Oneof) GetFGroup() *Oneof_F_Group {
-	if x, ok := m.GetUnion().(*Oneof_FGroup); ok {
-		return x.FGroup
-	}
-	return nil
-}
-
-func (m *Oneof) GetF_Largest_Tag() int32 {
-	if x, ok := m.GetUnion().(*Oneof_F_Largest_Tag); ok {
-		return x.F_Largest_Tag
-	}
-	return 0
-}
-
-func (m *Oneof) GetValue() int32 {
-	if x, ok := m.GetTormato().(*Oneof_Value); ok {
-		return x.Value
-	}
-	return 0
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*Oneof) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _Oneof_OneofMarshaler, _Oneof_OneofUnmarshaler, _Oneof_OneofSizer, []interface{}{
-		(*Oneof_F_Bool)(nil),
-		(*Oneof_F_Int32)(nil),
-		(*Oneof_F_Int64)(nil),
-		(*Oneof_F_Fixed32)(nil),
-		(*Oneof_F_Fixed64)(nil),
-		(*Oneof_F_Uint32)(nil),
-		(*Oneof_F_Uint64)(nil),
-		(*Oneof_F_Float)(nil),
-		(*Oneof_F_Double)(nil),
-		(*Oneof_F_String)(nil),
-		(*Oneof_F_Bytes)(nil),
-		(*Oneof_F_Sint32)(nil),
-		(*Oneof_F_Sint64)(nil),
-		(*Oneof_F_Enum)(nil),
-		(*Oneof_F_Message)(nil),
-		(*Oneof_FGroup)(nil),
-		(*Oneof_F_Largest_Tag)(nil),
-		(*Oneof_Value)(nil),
-	}
-}
-
-func _Oneof_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*Oneof)
-	// union
-	switch x := m.Union.(type) {
-	case *Oneof_F_Bool:
-		t := uint64(0)
-		if x.F_Bool {
-			t = 1
-		}
-		b.EncodeVarint(1<<3 | proto.WireVarint)
-		b.EncodeVarint(t)
-	case *Oneof_F_Int32:
-		b.EncodeVarint(2<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.F_Int32))
-	case *Oneof_F_Int64:
-		b.EncodeVarint(3<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.F_Int64))
-	case *Oneof_F_Fixed32:
-		b.EncodeVarint(4<<3 | proto.WireFixed32)
-		b.EncodeFixed32(uint64(x.F_Fixed32))
-	case *Oneof_F_Fixed64:
-		b.EncodeVarint(5<<3 | proto.WireFixed64)
-		b.EncodeFixed64(uint64(x.F_Fixed64))
-	case *Oneof_F_Uint32:
-		b.EncodeVarint(6<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.F_Uint32))
-	case *Oneof_F_Uint64:
-		b.EncodeVarint(7<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.F_Uint64))
-	case *Oneof_F_Float:
-		b.EncodeVarint(8<<3 | proto.WireFixed32)
-		b.EncodeFixed32(uint64(math.Float32bits(x.F_Float)))
-	case *Oneof_F_Double:
-		b.EncodeVarint(9<<3 | proto.WireFixed64)
-		b.EncodeFixed64(math.Float64bits(x.F_Double))
-	case *Oneof_F_String:
-		b.EncodeVarint(10<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.F_String)
-	case *Oneof_F_Bytes:
-		b.EncodeVarint(11<<3 | proto.WireBytes)
-		b.EncodeRawBytes(x.F_Bytes)
-	case *Oneof_F_Sint32:
-		b.EncodeVarint(12<<3 | proto.WireVarint)
-		b.EncodeZigzag32(uint64(x.F_Sint32))
-	case *Oneof_F_Sint64:
-		b.EncodeVarint(13<<3 | proto.WireVarint)
-		b.EncodeZigzag64(uint64(x.F_Sint64))
-	case *Oneof_F_Enum:
-		b.EncodeVarint(14<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.F_Enum))
-	case *Oneof_F_Message:
-		b.EncodeVarint(15<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.F_Message); err != nil {
-			return err
-		}
-	case *Oneof_FGroup:
-		b.EncodeVarint(16<<3 | proto.WireStartGroup)
-		if err := b.Marshal(x.FGroup); err != nil {
-			return err
-		}
-		b.EncodeVarint(16<<3 | proto.WireEndGroup)
-	case *Oneof_F_Largest_Tag:
-		b.EncodeVarint(536870911<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.F_Largest_Tag))
-	case nil:
-	default:
-		return fmt.Errorf("Oneof.Union has unexpected type %T", x)
-	}
-	// tormato
-	switch x := m.Tormato.(type) {
-	case *Oneof_Value:
-		b.EncodeVarint(100<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.Value))
-	case nil:
-	default:
-		return fmt.Errorf("Oneof.Tormato has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _Oneof_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*Oneof)
-	switch tag {
-	case 1: // union.F_Bool
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Oneof_F_Bool{x != 0}
-		return true, err
-	case 2: // union.F_Int32
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Oneof_F_Int32{int32(x)}
-		return true, err
-	case 3: // union.F_Int64
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Oneof_F_Int64{int64(x)}
-		return true, err
-	case 4: // union.F_Fixed32
-		if wire != proto.WireFixed32 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed32()
-		m.Union = &Oneof_F_Fixed32{uint32(x)}
-		return true, err
-	case 5: // union.F_Fixed64
-		if wire != proto.WireFixed64 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed64()
-		m.Union = &Oneof_F_Fixed64{x}
-		return true, err
-	case 6: // union.F_Uint32
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Oneof_F_Uint32{uint32(x)}
-		return true, err
-	case 7: // union.F_Uint64
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Oneof_F_Uint64{x}
-		return true, err
-	case 8: // union.F_Float
-		if wire != proto.WireFixed32 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed32()
-		m.Union = &Oneof_F_Float{math.Float32frombits(uint32(x))}
-		return true, err
-	case 9: // union.F_Double
-		if wire != proto.WireFixed64 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed64()
-		m.Union = &Oneof_F_Double{math.Float64frombits(x)}
-		return true, err
-	case 10: // union.F_String
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Union = &Oneof_F_String{x}
-		return true, err
-	case 11: // union.F_Bytes
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeRawBytes(true)
-		m.Union = &Oneof_F_Bytes{x}
-		return true, err
-	case 12: // union.F_Sint32
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeZigzag32()
-		m.Union = &Oneof_F_Sint32{int32(x)}
-		return true, err
-	case 13: // union.F_Sint64
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeZigzag64()
-		m.Union = &Oneof_F_Sint64{int64(x)}
-		return true, err
-	case 14: // union.F_Enum
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Oneof_F_Enum{MyMessage_Color(x)}
-		return true, err
-	case 15: // union.F_Message
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(GoTestField)
-		err := b.DecodeMessage(msg)
-		m.Union = &Oneof_F_Message{msg}
-		return true, err
-	case 16: // union.f_group
-		if wire != proto.WireStartGroup {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(Oneof_F_Group)
-		err := b.DecodeGroup(msg)
-		m.Union = &Oneof_FGroup{msg}
-		return true, err
-	case 536870911: // union.F_Largest_Tag
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Oneof_F_Largest_Tag{int32(x)}
-		return true, err
-	case 100: // tormato.value
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Tormato = &Oneof_Value{int32(x)}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _Oneof_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*Oneof)
-	// union
-	switch x := m.Union.(type) {
-	case *Oneof_F_Bool:
-		n += proto.SizeVarint(1<<3 | proto.WireVarint)
-		n += 1
-	case *Oneof_F_Int32:
-		n += proto.SizeVarint(2<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.F_Int32))
-	case *Oneof_F_Int64:
-		n += proto.SizeVarint(3<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.F_Int64))
-	case *Oneof_F_Fixed32:
-		n += proto.SizeVarint(4<<3 | proto.WireFixed32)
-		n += 4
-	case *Oneof_F_Fixed64:
-		n += proto.SizeVarint(5<<3 | proto.WireFixed64)
-		n += 8
-	case *Oneof_F_Uint32:
-		n += proto.SizeVarint(6<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.F_Uint32))
-	case *Oneof_F_Uint64:
-		n += proto.SizeVarint(7<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.F_Uint64))
-	case *Oneof_F_Float:
-		n += proto.SizeVarint(8<<3 | proto.WireFixed32)
-		n += 4
-	case *Oneof_F_Double:
-		n += proto.SizeVarint(9<<3 | proto.WireFixed64)
-		n += 8
-	case *Oneof_F_String:
-		n += proto.SizeVarint(10<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.F_String)))
-		n += len(x.F_String)
-	case *Oneof_F_Bytes:
-		n += proto.SizeVarint(11<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.F_Bytes)))
-		n += len(x.F_Bytes)
-	case *Oneof_F_Sint32:
-		n += proto.SizeVarint(12<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64((uint32(x.F_Sint32) << 1) ^ uint32((int32(x.F_Sint32) >> 31))))
-	case *Oneof_F_Sint64:
-		n += proto.SizeVarint(13<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(uint64(x.F_Sint64<<1) ^ uint64((int64(x.F_Sint64) >> 63))))
-	case *Oneof_F_Enum:
-		n += proto.SizeVarint(14<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.F_Enum))
-	case *Oneof_F_Message:
-		s := proto.Size(x.F_Message)
-		n += proto.SizeVarint(15<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case *Oneof_FGroup:
-		n += proto.SizeVarint(16<<3 | proto.WireStartGroup)
-		n += proto.Size(x.FGroup)
-		n += proto.SizeVarint(16<<3 | proto.WireEndGroup)
-	case *Oneof_F_Largest_Tag:
-		n += proto.SizeVarint(536870911<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.F_Largest_Tag))
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	// tormato
-	switch x := m.Tormato.(type) {
-	case *Oneof_Value:
-		n += proto.SizeVarint(100<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.Value))
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-type Oneof_F_Group struct {
-	X                *int32 `protobuf:"varint,17,opt,name=x" json:"x,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *Oneof_F_Group) Reset()                    { *m = Oneof_F_Group{} }
-func (m *Oneof_F_Group) String() string            { return proto.CompactTextString(m) }
-func (*Oneof_F_Group) ProtoMessage()               {}
-func (*Oneof_F_Group) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{29, 0} }
-
-func (m *Oneof_F_Group) GetX() int32 {
-	if m != nil && m.X != nil {
-		return *m.X
-	}
-	return 0
-}
-
-type Communique struct {
-	MakeMeCry *bool `protobuf:"varint,1,opt,name=make_me_cry,json=makeMeCry" json:"make_me_cry,omitempty"`
-	// This is a oneof, called "union".
-	//
-	// Types that are valid to be assigned to Union:
-	//	*Communique_Number
-	//	*Communique_Name
-	//	*Communique_Data
-	//	*Communique_TempC
-	//	*Communique_Col
-	//	*Communique_Msg
-	Union            isCommunique_Union `protobuf_oneof:"union"`
-	XXX_unrecognized []byte             `json:"-"`
-}
-
-func (m *Communique) Reset()                    { *m = Communique{} }
-func (m *Communique) String() string            { return proto.CompactTextString(m) }
-func (*Communique) ProtoMessage()               {}
-func (*Communique) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{30} }
-
-type isCommunique_Union interface {
-	isCommunique_Union()
-}
-
-type Communique_Number struct {
-	Number int32 `protobuf:"varint,5,opt,name=number,oneof"`
-}
-type Communique_Name struct {
-	Name string `protobuf:"bytes,6,opt,name=name,oneof"`
-}
-type Communique_Data struct {
-	Data []byte `protobuf:"bytes,7,opt,name=data,oneof"`
-}
-type Communique_TempC struct {
-	TempC float64 `protobuf:"fixed64,8,opt,name=temp_c,json=tempC,oneof"`
-}
-type Communique_Col struct {
-	Col MyMessage_Color `protobuf:"varint,9,opt,name=col,enum=testdata.MyMessage_Color,oneof"`
-}
-type Communique_Msg struct {
-	Msg *Strings `protobuf:"bytes,10,opt,name=msg,oneof"`
-}
-
-func (*Communique_Number) isCommunique_Union() {}
-func (*Communique_Name) isCommunique_Union()   {}
-func (*Communique_Data) isCommunique_Union()   {}
-func (*Communique_TempC) isCommunique_Union()  {}
-func (*Communique_Col) isCommunique_Union()    {}
-func (*Communique_Msg) isCommunique_Union()    {}
-
-func (m *Communique) GetUnion() isCommunique_Union {
-	if m != nil {
-		return m.Union
-	}
-	return nil
-}
-
-func (m *Communique) GetMakeMeCry() bool {
-	if m != nil && m.MakeMeCry != nil {
-		return *m.MakeMeCry
-	}
-	return false
-}
-
-func (m *Communique) GetNumber() int32 {
-	if x, ok := m.GetUnion().(*Communique_Number); ok {
-		return x.Number
-	}
-	return 0
-}
-
-func (m *Communique) GetName() string {
-	if x, ok := m.GetUnion().(*Communique_Name); ok {
-		return x.Name
-	}
-	return ""
-}
-
-func (m *Communique) GetData() []byte {
-	if x, ok := m.GetUnion().(*Communique_Data); ok {
-		return x.Data
-	}
-	return nil
-}
-
-func (m *Communique) GetTempC() float64 {
-	if x, ok := m.GetUnion().(*Communique_TempC); ok {
-		return x.TempC
-	}
-	return 0
-}
-
-func (m *Communique) GetCol() MyMessage_Color {
-	if x, ok := m.GetUnion().(*Communique_Col); ok {
-		return x.Col
-	}
-	return MyMessage_RED
-}
-
-func (m *Communique) GetMsg() *Strings {
-	if x, ok := m.GetUnion().(*Communique_Msg); ok {
-		return x.Msg
-	}
-	return nil
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*Communique) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _Communique_OneofMarshaler, _Communique_OneofUnmarshaler, _Communique_OneofSizer, []interface{}{
-		(*Communique_Number)(nil),
-		(*Communique_Name)(nil),
-		(*Communique_Data)(nil),
-		(*Communique_TempC)(nil),
-		(*Communique_Col)(nil),
-		(*Communique_Msg)(nil),
-	}
-}
-
-func _Communique_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*Communique)
-	// union
-	switch x := m.Union.(type) {
-	case *Communique_Number:
-		b.EncodeVarint(5<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.Number))
-	case *Communique_Name:
-		b.EncodeVarint(6<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.Name)
-	case *Communique_Data:
-		b.EncodeVarint(7<<3 | proto.WireBytes)
-		b.EncodeRawBytes(x.Data)
-	case *Communique_TempC:
-		b.EncodeVarint(8<<3 | proto.WireFixed64)
-		b.EncodeFixed64(math.Float64bits(x.TempC))
-	case *Communique_Col:
-		b.EncodeVarint(9<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.Col))
-	case *Communique_Msg:
-		b.EncodeVarint(10<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.Msg); err != nil {
-			return err
-		}
-	case nil:
-	default:
-		return fmt.Errorf("Communique.Union has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _Communique_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*Communique)
-	switch tag {
-	case 5: // union.number
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Communique_Number{int32(x)}
-		return true, err
-	case 6: // union.name
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Union = &Communique_Name{x}
-		return true, err
-	case 7: // union.data
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeRawBytes(true)
-		m.Union = &Communique_Data{x}
-		return true, err
-	case 8: // union.temp_c
-		if wire != proto.WireFixed64 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed64()
-		m.Union = &Communique_TempC{math.Float64frombits(x)}
-		return true, err
-	case 9: // union.col
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Communique_Col{MyMessage_Color(x)}
-		return true, err
-	case 10: // union.msg
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(Strings)
-		err := b.DecodeMessage(msg)
-		m.Union = &Communique_Msg{msg}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _Communique_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*Communique)
-	// union
-	switch x := m.Union.(type) {
-	case *Communique_Number:
-		n += proto.SizeVarint(5<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.Number))
-	case *Communique_Name:
-		n += proto.SizeVarint(6<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.Name)))
-		n += len(x.Name)
-	case *Communique_Data:
-		n += proto.SizeVarint(7<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.Data)))
-		n += len(x.Data)
-	case *Communique_TempC:
-		n += proto.SizeVarint(8<<3 | proto.WireFixed64)
-		n += 8
-	case *Communique_Col:
-		n += proto.SizeVarint(9<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.Col))
-	case *Communique_Msg:
-		s := proto.Size(x.Msg)
-		n += proto.SizeVarint(10<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-var E_Greeting = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessage)(nil),
-	ExtensionType: ([]string)(nil),
-	Field:         106,
-	Name:          "testdata.greeting",
-	Tag:           "bytes,106,rep,name=greeting",
-	Filename:      "test.proto",
-}
-
-var E_Complex = &proto.ExtensionDesc{
-	ExtendedType:  (*OtherMessage)(nil),
-	ExtensionType: (*ComplexExtension)(nil),
-	Field:         200,
-	Name:          "testdata.complex",
-	Tag:           "bytes,200,opt,name=complex",
-	Filename:      "test.proto",
-}
-
-var E_RComplex = &proto.ExtensionDesc{
-	ExtendedType:  (*OtherMessage)(nil),
-	ExtensionType: ([]*ComplexExtension)(nil),
-	Field:         201,
-	Name:          "testdata.r_complex",
-	Tag:           "bytes,201,rep,name=r_complex,json=rComplex",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultDouble = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*float64)(nil),
-	Field:         101,
-	Name:          "testdata.no_default_double",
-	Tag:           "fixed64,101,opt,name=no_default_double,json=noDefaultDouble",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultFloat = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*float32)(nil),
-	Field:         102,
-	Name:          "testdata.no_default_float",
-	Tag:           "fixed32,102,opt,name=no_default_float,json=noDefaultFloat",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultInt32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int32)(nil),
-	Field:         103,
-	Name:          "testdata.no_default_int32",
-	Tag:           "varint,103,opt,name=no_default_int32,json=noDefaultInt32",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultInt64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int64)(nil),
-	Field:         104,
-	Name:          "testdata.no_default_int64",
-	Tag:           "varint,104,opt,name=no_default_int64,json=noDefaultInt64",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultUint32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint32)(nil),
-	Field:         105,
-	Name:          "testdata.no_default_uint32",
-	Tag:           "varint,105,opt,name=no_default_uint32,json=noDefaultUint32",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultUint64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint64)(nil),
-	Field:         106,
-	Name:          "testdata.no_default_uint64",
-	Tag:           "varint,106,opt,name=no_default_uint64,json=noDefaultUint64",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultSint32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int32)(nil),
-	Field:         107,
-	Name:          "testdata.no_default_sint32",
-	Tag:           "zigzag32,107,opt,name=no_default_sint32,json=noDefaultSint32",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultSint64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int64)(nil),
-	Field:         108,
-	Name:          "testdata.no_default_sint64",
-	Tag:           "zigzag64,108,opt,name=no_default_sint64,json=noDefaultSint64",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultFixed32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint32)(nil),
-	Field:         109,
-	Name:          "testdata.no_default_fixed32",
-	Tag:           "fixed32,109,opt,name=no_default_fixed32,json=noDefaultFixed32",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultFixed64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint64)(nil),
-	Field:         110,
-	Name:          "testdata.no_default_fixed64",
-	Tag:           "fixed64,110,opt,name=no_default_fixed64,json=noDefaultFixed64",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultSfixed32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int32)(nil),
-	Field:         111,
-	Name:          "testdata.no_default_sfixed32",
-	Tag:           "fixed32,111,opt,name=no_default_sfixed32,json=noDefaultSfixed32",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultSfixed64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int64)(nil),
-	Field:         112,
-	Name:          "testdata.no_default_sfixed64",
-	Tag:           "fixed64,112,opt,name=no_default_sfixed64,json=noDefaultSfixed64",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultBool = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*bool)(nil),
-	Field:         113,
-	Name:          "testdata.no_default_bool",
-	Tag:           "varint,113,opt,name=no_default_bool,json=noDefaultBool",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultString = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         114,
-	Name:          "testdata.no_default_string",
-	Tag:           "bytes,114,opt,name=no_default_string,json=noDefaultString",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultBytes = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: ([]byte)(nil),
-	Field:         115,
-	Name:          "testdata.no_default_bytes",
-	Tag:           "bytes,115,opt,name=no_default_bytes,json=noDefaultBytes",
-	Filename:      "test.proto",
-}
-
-var E_NoDefaultEnum = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*DefaultsMessage_DefaultsEnum)(nil),
-	Field:         116,
-	Name:          "testdata.no_default_enum",
-	Tag:           "varint,116,opt,name=no_default_enum,json=noDefaultEnum,enum=testdata.DefaultsMessage_DefaultsEnum",
-	Filename:      "test.proto",
-}
-
-var E_DefaultDouble = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*float64)(nil),
-	Field:         201,
-	Name:          "testdata.default_double",
-	Tag:           "fixed64,201,opt,name=default_double,json=defaultDouble,def=3.1415",
-	Filename:      "test.proto",
-}
-
-var E_DefaultFloat = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*float32)(nil),
-	Field:         202,
-	Name:          "testdata.default_float",
-	Tag:           "fixed32,202,opt,name=default_float,json=defaultFloat,def=3.14",
-	Filename:      "test.proto",
-}
-
-var E_DefaultInt32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int32)(nil),
-	Field:         203,
-	Name:          "testdata.default_int32",
-	Tag:           "varint,203,opt,name=default_int32,json=defaultInt32,def=42",
-	Filename:      "test.proto",
-}
-
-var E_DefaultInt64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int64)(nil),
-	Field:         204,
-	Name:          "testdata.default_int64",
-	Tag:           "varint,204,opt,name=default_int64,json=defaultInt64,def=43",
-	Filename:      "test.proto",
-}
-
-var E_DefaultUint32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint32)(nil),
-	Field:         205,
-	Name:          "testdata.default_uint32",
-	Tag:           "varint,205,opt,name=default_uint32,json=defaultUint32,def=44",
-	Filename:      "test.proto",
-}
-
-var E_DefaultUint64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint64)(nil),
-	Field:         206,
-	Name:          "testdata.default_uint64",
-	Tag:           "varint,206,opt,name=default_uint64,json=defaultUint64,def=45",
-	Filename:      "test.proto",
-}
-
-var E_DefaultSint32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int32)(nil),
-	Field:         207,
-	Name:          "testdata.default_sint32",
-	Tag:           "zigzag32,207,opt,name=default_sint32,json=defaultSint32,def=46",
-	Filename:      "test.proto",
-}
-
-var E_DefaultSint64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int64)(nil),
-	Field:         208,
-	Name:          "testdata.default_sint64",
-	Tag:           "zigzag64,208,opt,name=default_sint64,json=defaultSint64,def=47",
-	Filename:      "test.proto",
-}
-
-var E_DefaultFixed32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint32)(nil),
-	Field:         209,
-	Name:          "testdata.default_fixed32",
-	Tag:           "fixed32,209,opt,name=default_fixed32,json=defaultFixed32,def=48",
-	Filename:      "test.proto",
-}
-
-var E_DefaultFixed64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*uint64)(nil),
-	Field:         210,
-	Name:          "testdata.default_fixed64",
-	Tag:           "fixed64,210,opt,name=default_fixed64,json=defaultFixed64,def=49",
-	Filename:      "test.proto",
-}
-
-var E_DefaultSfixed32 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int32)(nil),
-	Field:         211,
-	Name:          "testdata.default_sfixed32",
-	Tag:           "fixed32,211,opt,name=default_sfixed32,json=defaultSfixed32,def=50",
-	Filename:      "test.proto",
-}
-
-var E_DefaultSfixed64 = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*int64)(nil),
-	Field:         212,
-	Name:          "testdata.default_sfixed64",
-	Tag:           "fixed64,212,opt,name=default_sfixed64,json=defaultSfixed64,def=51",
-	Filename:      "test.proto",
-}
-
-var E_DefaultBool = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*bool)(nil),
-	Field:         213,
-	Name:          "testdata.default_bool",
-	Tag:           "varint,213,opt,name=default_bool,json=defaultBool,def=1",
-	Filename:      "test.proto",
-}
-
-var E_DefaultString = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         214,
-	Name:          "testdata.default_string",
-	Tag:           "bytes,214,opt,name=default_string,json=defaultString,def=Hello, string",
-	Filename:      "test.proto",
-}
-
-var E_DefaultBytes = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: ([]byte)(nil),
-	Field:         215,
-	Name:          "testdata.default_bytes",
-	Tag:           "bytes,215,opt,name=default_bytes,json=defaultBytes,def=Hello, bytes",
-	Filename:      "test.proto",
-}
-
-var E_DefaultEnum = &proto.ExtensionDesc{
-	ExtendedType:  (*DefaultsMessage)(nil),
-	ExtensionType: (*DefaultsMessage_DefaultsEnum)(nil),
-	Field:         216,
-	Name:          "testdata.default_enum",
-	Tag:           "varint,216,opt,name=default_enum,json=defaultEnum,enum=testdata.DefaultsMessage_DefaultsEnum,def=1",
-	Filename:      "test.proto",
-}
-
-var E_X201 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         201,
-	Name:          "testdata.x201",
-	Tag:           "bytes,201,opt,name=x201",
-	Filename:      "test.proto",
-}
-
-var E_X202 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         202,
-	Name:          "testdata.x202",
-	Tag:           "bytes,202,opt,name=x202",
-	Filename:      "test.proto",
-}
-
-var E_X203 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         203,
-	Name:          "testdata.x203",
-	Tag:           "bytes,203,opt,name=x203",
-	Filename:      "test.proto",
-}
-
-var E_X204 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         204,
-	Name:          "testdata.x204",
-	Tag:           "bytes,204,opt,name=x204",
-	Filename:      "test.proto",
-}
-
-var E_X205 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         205,
-	Name:          "testdata.x205",
-	Tag:           "bytes,205,opt,name=x205",
-	Filename:      "test.proto",
-}
-
-var E_X206 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         206,
-	Name:          "testdata.x206",
-	Tag:           "bytes,206,opt,name=x206",
-	Filename:      "test.proto",
-}
-
-var E_X207 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         207,
-	Name:          "testdata.x207",
-	Tag:           "bytes,207,opt,name=x207",
-	Filename:      "test.proto",
-}
-
-var E_X208 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         208,
-	Name:          "testdata.x208",
-	Tag:           "bytes,208,opt,name=x208",
-	Filename:      "test.proto",
-}
-
-var E_X209 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         209,
-	Name:          "testdata.x209",
-	Tag:           "bytes,209,opt,name=x209",
-	Filename:      "test.proto",
-}
-
-var E_X210 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         210,
-	Name:          "testdata.x210",
-	Tag:           "bytes,210,opt,name=x210",
-	Filename:      "test.proto",
-}
-
-var E_X211 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         211,
-	Name:          "testdata.x211",
-	Tag:           "bytes,211,opt,name=x211",
-	Filename:      "test.proto",
-}
-
-var E_X212 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         212,
-	Name:          "testdata.x212",
-	Tag:           "bytes,212,opt,name=x212",
-	Filename:      "test.proto",
-}
-
-var E_X213 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         213,
-	Name:          "testdata.x213",
-	Tag:           "bytes,213,opt,name=x213",
-	Filename:      "test.proto",
-}
-
-var E_X214 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         214,
-	Name:          "testdata.x214",
-	Tag:           "bytes,214,opt,name=x214",
-	Filename:      "test.proto",
-}
-
-var E_X215 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         215,
-	Name:          "testdata.x215",
-	Tag:           "bytes,215,opt,name=x215",
-	Filename:      "test.proto",
-}
-
-var E_X216 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         216,
-	Name:          "testdata.x216",
-	Tag:           "bytes,216,opt,name=x216",
-	Filename:      "test.proto",
-}
-
-var E_X217 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         217,
-	Name:          "testdata.x217",
-	Tag:           "bytes,217,opt,name=x217",
-	Filename:      "test.proto",
-}
-
-var E_X218 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         218,
-	Name:          "testdata.x218",
-	Tag:           "bytes,218,opt,name=x218",
-	Filename:      "test.proto",
-}
-
-var E_X219 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         219,
-	Name:          "testdata.x219",
-	Tag:           "bytes,219,opt,name=x219",
-	Filename:      "test.proto",
-}
-
-var E_X220 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         220,
-	Name:          "testdata.x220",
-	Tag:           "bytes,220,opt,name=x220",
-	Filename:      "test.proto",
-}
-
-var E_X221 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         221,
-	Name:          "testdata.x221",
-	Tag:           "bytes,221,opt,name=x221",
-	Filename:      "test.proto",
-}
-
-var E_X222 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         222,
-	Name:          "testdata.x222",
-	Tag:           "bytes,222,opt,name=x222",
-	Filename:      "test.proto",
-}
-
-var E_X223 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         223,
-	Name:          "testdata.x223",
-	Tag:           "bytes,223,opt,name=x223",
-	Filename:      "test.proto",
-}
-
-var E_X224 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         224,
-	Name:          "testdata.x224",
-	Tag:           "bytes,224,opt,name=x224",
-	Filename:      "test.proto",
-}
-
-var E_X225 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         225,
-	Name:          "testdata.x225",
-	Tag:           "bytes,225,opt,name=x225",
-	Filename:      "test.proto",
-}
-
-var E_X226 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         226,
-	Name:          "testdata.x226",
-	Tag:           "bytes,226,opt,name=x226",
-	Filename:      "test.proto",
-}
-
-var E_X227 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         227,
-	Name:          "testdata.x227",
-	Tag:           "bytes,227,opt,name=x227",
-	Filename:      "test.proto",
-}
-
-var E_X228 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         228,
-	Name:          "testdata.x228",
-	Tag:           "bytes,228,opt,name=x228",
-	Filename:      "test.proto",
-}
-
-var E_X229 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         229,
-	Name:          "testdata.x229",
-	Tag:           "bytes,229,opt,name=x229",
-	Filename:      "test.proto",
-}
-
-var E_X230 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         230,
-	Name:          "testdata.x230",
-	Tag:           "bytes,230,opt,name=x230",
-	Filename:      "test.proto",
-}
-
-var E_X231 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         231,
-	Name:          "testdata.x231",
-	Tag:           "bytes,231,opt,name=x231",
-	Filename:      "test.proto",
-}
-
-var E_X232 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         232,
-	Name:          "testdata.x232",
-	Tag:           "bytes,232,opt,name=x232",
-	Filename:      "test.proto",
-}
-
-var E_X233 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         233,
-	Name:          "testdata.x233",
-	Tag:           "bytes,233,opt,name=x233",
-	Filename:      "test.proto",
-}
-
-var E_X234 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         234,
-	Name:          "testdata.x234",
-	Tag:           "bytes,234,opt,name=x234",
-	Filename:      "test.proto",
-}
-
-var E_X235 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         235,
-	Name:          "testdata.x235",
-	Tag:           "bytes,235,opt,name=x235",
-	Filename:      "test.proto",
-}
-
-var E_X236 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         236,
-	Name:          "testdata.x236",
-	Tag:           "bytes,236,opt,name=x236",
-	Filename:      "test.proto",
-}
-
-var E_X237 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         237,
-	Name:          "testdata.x237",
-	Tag:           "bytes,237,opt,name=x237",
-	Filename:      "test.proto",
-}
-
-var E_X238 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         238,
-	Name:          "testdata.x238",
-	Tag:           "bytes,238,opt,name=x238",
-	Filename:      "test.proto",
-}
-
-var E_X239 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         239,
-	Name:          "testdata.x239",
-	Tag:           "bytes,239,opt,name=x239",
-	Filename:      "test.proto",
-}
-
-var E_X240 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         240,
-	Name:          "testdata.x240",
-	Tag:           "bytes,240,opt,name=x240",
-	Filename:      "test.proto",
-}
-
-var E_X241 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         241,
-	Name:          "testdata.x241",
-	Tag:           "bytes,241,opt,name=x241",
-	Filename:      "test.proto",
-}
-
-var E_X242 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         242,
-	Name:          "testdata.x242",
-	Tag:           "bytes,242,opt,name=x242",
-	Filename:      "test.proto",
-}
-
-var E_X243 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         243,
-	Name:          "testdata.x243",
-	Tag:           "bytes,243,opt,name=x243",
-	Filename:      "test.proto",
-}
-
-var E_X244 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         244,
-	Name:          "testdata.x244",
-	Tag:           "bytes,244,opt,name=x244",
-	Filename:      "test.proto",
-}
-
-var E_X245 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         245,
-	Name:          "testdata.x245",
-	Tag:           "bytes,245,opt,name=x245",
-	Filename:      "test.proto",
-}
-
-var E_X246 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         246,
-	Name:          "testdata.x246",
-	Tag:           "bytes,246,opt,name=x246",
-	Filename:      "test.proto",
-}
-
-var E_X247 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         247,
-	Name:          "testdata.x247",
-	Tag:           "bytes,247,opt,name=x247",
-	Filename:      "test.proto",
-}
-
-var E_X248 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         248,
-	Name:          "testdata.x248",
-	Tag:           "bytes,248,opt,name=x248",
-	Filename:      "test.proto",
-}
-
-var E_X249 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         249,
-	Name:          "testdata.x249",
-	Tag:           "bytes,249,opt,name=x249",
-	Filename:      "test.proto",
-}
-
-var E_X250 = &proto.ExtensionDesc{
-	ExtendedType:  (*MyMessageSet)(nil),
-	ExtensionType: (*Empty)(nil),
-	Field:         250,
-	Name:          "testdata.x250",
-	Tag:           "bytes,250,opt,name=x250",
-	Filename:      "test.proto",
-}
-
-func init() {
-	proto.RegisterType((*GoEnum)(nil), "testdata.GoEnum")
-	proto.RegisterType((*GoTestField)(nil), "testdata.GoTestField")
-	proto.RegisterType((*GoTest)(nil), "testdata.GoTest")
-	proto.RegisterType((*GoTest_RequiredGroup)(nil), "testdata.GoTest.RequiredGroup")
-	proto.RegisterType((*GoTest_RepeatedGroup)(nil), "testdata.GoTest.RepeatedGroup")
-	proto.RegisterType((*GoTest_OptionalGroup)(nil), "testdata.GoTest.OptionalGroup")
-	proto.RegisterType((*GoTestRequiredGroupField)(nil), "testdata.GoTestRequiredGroupField")
-	proto.RegisterType((*GoTestRequiredGroupField_Group)(nil), "testdata.GoTestRequiredGroupField.Group")
-	proto.RegisterType((*GoSkipTest)(nil), "testdata.GoSkipTest")
-	proto.RegisterType((*GoSkipTest_SkipGroup)(nil), "testdata.GoSkipTest.SkipGroup")
-	proto.RegisterType((*NonPackedTest)(nil), "testdata.NonPackedTest")
-	proto.RegisterType((*PackedTest)(nil), "testdata.PackedTest")
-	proto.RegisterType((*MaxTag)(nil), "testdata.MaxTag")
-	proto.RegisterType((*OldMessage)(nil), "testdata.OldMessage")
-	proto.RegisterType((*OldMessage_Nested)(nil), "testdata.OldMessage.Nested")
-	proto.RegisterType((*NewMessage)(nil), "testdata.NewMessage")
-	proto.RegisterType((*NewMessage_Nested)(nil), "testdata.NewMessage.Nested")
-	proto.RegisterType((*InnerMessage)(nil), "testdata.InnerMessage")
-	proto.RegisterType((*OtherMessage)(nil), "testdata.OtherMessage")
-	proto.RegisterType((*RequiredInnerMessage)(nil), "testdata.RequiredInnerMessage")
-	proto.RegisterType((*MyMessage)(nil), "testdata.MyMessage")
-	proto.RegisterType((*MyMessage_SomeGroup)(nil), "testdata.MyMessage.SomeGroup")
-	proto.RegisterType((*Ext)(nil), "testdata.Ext")
-	proto.RegisterType((*ComplexExtension)(nil), "testdata.ComplexExtension")
-	proto.RegisterType((*DefaultsMessage)(nil), "testdata.DefaultsMessage")
-	proto.RegisterType((*MyMessageSet)(nil), "testdata.MyMessageSet")
-	proto.RegisterType((*Empty)(nil), "testdata.Empty")
-	proto.RegisterType((*MessageList)(nil), "testdata.MessageList")
-	proto.RegisterType((*MessageList_Message)(nil), "testdata.MessageList.Message")
-	proto.RegisterType((*Strings)(nil), "testdata.Strings")
-	proto.RegisterType((*Defaults)(nil), "testdata.Defaults")
-	proto.RegisterType((*SubDefaults)(nil), "testdata.SubDefaults")
-	proto.RegisterType((*RepeatedEnum)(nil), "testdata.RepeatedEnum")
-	proto.RegisterType((*MoreRepeated)(nil), "testdata.MoreRepeated")
-	proto.RegisterType((*GroupOld)(nil), "testdata.GroupOld")
-	proto.RegisterType((*GroupOld_G)(nil), "testdata.GroupOld.G")
-	proto.RegisterType((*GroupNew)(nil), "testdata.GroupNew")
-	proto.RegisterType((*GroupNew_G)(nil), "testdata.GroupNew.G")
-	proto.RegisterType((*FloatingPoint)(nil), "testdata.FloatingPoint")
-	proto.RegisterType((*MessageWithMap)(nil), "testdata.MessageWithMap")
-	proto.RegisterType((*Oneof)(nil), "testdata.Oneof")
-	proto.RegisterType((*Oneof_F_Group)(nil), "testdata.Oneof.F_Group")
-	proto.RegisterType((*Communique)(nil), "testdata.Communique")
-	proto.RegisterEnum("testdata.FOO", FOO_name, FOO_value)
-	proto.RegisterEnum("testdata.GoTest_KIND", GoTest_KIND_name, GoTest_KIND_value)
-	proto.RegisterEnum("testdata.MyMessage_Color", MyMessage_Color_name, MyMessage_Color_value)
-	proto.RegisterEnum("testdata.DefaultsMessage_DefaultsEnum", DefaultsMessage_DefaultsEnum_name, DefaultsMessage_DefaultsEnum_value)
-	proto.RegisterEnum("testdata.Defaults_Color", Defaults_Color_name, Defaults_Color_value)
-	proto.RegisterEnum("testdata.RepeatedEnum_Color", RepeatedEnum_Color_name, RepeatedEnum_Color_value)
-	proto.RegisterExtension(E_Ext_More)
-	proto.RegisterExtension(E_Ext_Text)
-	proto.RegisterExtension(E_Ext_Number)
-	proto.RegisterExtension(E_Greeting)
-	proto.RegisterExtension(E_Complex)
-	proto.RegisterExtension(E_RComplex)
-	proto.RegisterExtension(E_NoDefaultDouble)
-	proto.RegisterExtension(E_NoDefaultFloat)
-	proto.RegisterExtension(E_NoDefaultInt32)
-	proto.RegisterExtension(E_NoDefaultInt64)
-	proto.RegisterExtension(E_NoDefaultUint32)
-	proto.RegisterExtension(E_NoDefaultUint64)
-	proto.RegisterExtension(E_NoDefaultSint32)
-	proto.RegisterExtension(E_NoDefaultSint64)
-	proto.RegisterExtension(E_NoDefaultFixed32)
-	proto.RegisterExtension(E_NoDefaultFixed64)
-	proto.RegisterExtension(E_NoDefaultSfixed32)
-	proto.RegisterExtension(E_NoDefaultSfixed64)
-	proto.RegisterExtension(E_NoDefaultBool)
-	proto.RegisterExtension(E_NoDefaultString)
-	proto.RegisterExtension(E_NoDefaultBytes)
-	proto.RegisterExtension(E_NoDefaultEnum)
-	proto.RegisterExtension(E_DefaultDouble)
-	proto.RegisterExtension(E_DefaultFloat)
-	proto.RegisterExtension(E_DefaultInt32)
-	proto.RegisterExtension(E_DefaultInt64)
-	proto.RegisterExtension(E_DefaultUint32)
-	proto.RegisterExtension(E_DefaultUint64)
-	proto.RegisterExtension(E_DefaultSint32)
-	proto.RegisterExtension(E_DefaultSint64)
-	proto.RegisterExtension(E_DefaultFixed32)
-	proto.RegisterExtension(E_DefaultFixed64)
-	proto.RegisterExtension(E_DefaultSfixed32)
-	proto.RegisterExtension(E_DefaultSfixed64)
-	proto.RegisterExtension(E_DefaultBool)
-	proto.RegisterExtension(E_DefaultString)
-	proto.RegisterExtension(E_DefaultBytes)
-	proto.RegisterExtension(E_DefaultEnum)
-	proto.RegisterExtension(E_X201)
-	proto.RegisterExtension(E_X202)
-	proto.RegisterExtension(E_X203)
-	proto.RegisterExtension(E_X204)
-	proto.RegisterExtension(E_X205)
-	proto.RegisterExtension(E_X206)
-	proto.RegisterExtension(E_X207)
-	proto.RegisterExtension(E_X208)
-	proto.RegisterExtension(E_X209)
-	proto.RegisterExtension(E_X210)
-	proto.RegisterExtension(E_X211)
-	proto.RegisterExtension(E_X212)
-	proto.RegisterExtension(E_X213)
-	proto.RegisterExtension(E_X214)
-	proto.RegisterExtension(E_X215)
-	proto.RegisterExtension(E_X216)
-	proto.RegisterExtension(E_X217)
-	proto.RegisterExtension(E_X218)
-	proto.RegisterExtension(E_X219)
-	proto.RegisterExtension(E_X220)
-	proto.RegisterExtension(E_X221)
-	proto.RegisterExtension(E_X222)
-	proto.RegisterExtension(E_X223)
-	proto.RegisterExtension(E_X224)
-	proto.RegisterExtension(E_X225)
-	proto.RegisterExtension(E_X226)
-	proto.RegisterExtension(E_X227)
-	proto.RegisterExtension(E_X228)
-	proto.RegisterExtension(E_X229)
-	proto.RegisterExtension(E_X230)
-	proto.RegisterExtension(E_X231)
-	proto.RegisterExtension(E_X232)
-	proto.RegisterExtension(E_X233)
-	proto.RegisterExtension(E_X234)
-	proto.RegisterExtension(E_X235)
-	proto.RegisterExtension(E_X236)
-	proto.RegisterExtension(E_X237)
-	proto.RegisterExtension(E_X238)
-	proto.RegisterExtension(E_X239)
-	proto.RegisterExtension(E_X240)
-	proto.RegisterExtension(E_X241)
-	proto.RegisterExtension(E_X242)
-	proto.RegisterExtension(E_X243)
-	proto.RegisterExtension(E_X244)
-	proto.RegisterExtension(E_X245)
-	proto.RegisterExtension(E_X246)
-	proto.RegisterExtension(E_X247)
-	proto.RegisterExtension(E_X248)
-	proto.RegisterExtension(E_X249)
-	proto.RegisterExtension(E_X250)
-}
-
-func init() { proto.RegisterFile("test.proto", fileDescriptor0) }
-
-var fileDescriptor0 = []byte{
-	// 4453 bytes of a gzipped FileDescriptorProto
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-	0x3f, 0xc6, 0xb0, 0xb9, 0xd6, 0xaa, 0xd1, 0x5a, 0xfb, 0x51, 0x0c, 0x9b, 0x6b, 0xad, 0x1a, 0xad,
-	0xb5, 0x7f, 0x8a, 0x61, 0x73, 0xad, 0x55, 0xa3, 0xb5, 0xf6, 0xcf, 0x31, 0x6c, 0xae, 0xb5, 0x6a,
-	0xb4, 0xd6, 0xfe, 0x25, 0x86, 0xcd, 0xb5, 0x56, 0x8d, 0xd6, 0xda, 0xbf, 0xc6, 0xb0, 0xb9, 0xd6,
-	0xaa, 0xd1, 0x5a, 0xfb, 0xb7, 0x18, 0x36, 0xd7, 0x9a, 0x1e, 0xad, 0xb5, 0x7f, 0x8f, 0x66, 0xeb,
-	0x5c, 0x6b, 0x7a, 0xb4, 0xd6, 0xfe, 0x23, 0x86, 0xcd, 0xb5, 0xa6, 0x47, 0x6b, 0xed, 0x3f, 0x63,
-	0xd8, 0x5c, 0x6b, 0x7a, 0xb4, 0xd6, 0xfe, 0x2b, 0x86, 0xcd, 0xb5, 0xa6, 0x47, 0x6b, 0xed, 0xbf,
-	0x63, 0xd8, 0x5c, 0x6b, 0x7a, 0xb4, 0xd6, 0xfe, 0x27, 0x86, 0xcd, 0xb5, 0xa6, 0x47, 0x6b, 0xed,
-	0xc7, 0x31, 0x6c, 0xae, 0x35, 0x3d, 0x5a, 0x6b, 0x3f, 0x89, 0x61, 0x73, 0xad, 0xe9, 0xd1, 0x5a,
-	0xfb, 0xdf, 0x18, 0x36, 0xd7, 0x9a, 0x1e, 0xad, 0xb5, 0xff, 0x8b, 0x61, 0x73, 0xad, 0xad, 0x47,
-	0x6b, 0xed, 0xff, 0xa3, 0xd9, 0xeb, 0xab, 0x3f, 0x0d, 0x00, 0x00, 0xff, 0xff, 0xaa, 0x00, 0xcd,
-	0x32, 0x57, 0x39, 0x00, 0x00,
-}
diff --git a/proto/text.go b/proto/text.go
index 965876b..2205fda 100644
--- a/proto/text.go
+++ b/proto/text.go
@@ -50,7 +50,6 @@
 var (
 	newline         = []byte("\n")
 	spaces          = []byte("                                        ")
-	gtNewline       = []byte(">\n")
 	endBraceNewline = []byte("}\n")
 	backslashN      = []byte{'\\', 'n'}
 	backslashR      = []byte{'\\', 'r'}
@@ -170,11 +169,6 @@
 	return nil
 }
 
-// raw is the interface satisfied by RawMessage.
-type raw interface {
-	Bytes() []byte
-}
-
 func requiresQuotes(u string) bool {
 	// When type URL contains any characters except [0-9A-Za-z./\-]*, it must be quoted.
 	for _, ch := range u {
@@ -269,6 +263,10 @@
 		props := sprops.Prop[i]
 		name := st.Field(i).Name
 
+		if name == "XXX_NoUnkeyedLiteral" {
+			continue
+		}
+
 		if strings.HasPrefix(name, "XXX_") {
 			// There are two XXX_ fields:
 			//   XXX_unrecognized []byte
@@ -436,12 +434,6 @@
 				return err
 			}
 		}
-		if b, ok := fv.Interface().(raw); ok {
-			if err := writeRaw(w, b.Bytes()); err != nil {
-				return err
-			}
-			continue
-		}
 
 		// Enums have a String method, so writeAny will work fine.
 		if err := tm.writeAny(w, fv, props); err != nil {
@@ -455,7 +447,7 @@
 
 	// Extensions (the XXX_extensions field).
 	pv := sv.Addr()
-	if _, ok := extendable(pv.Interface()); ok {
+	if _, err := extendable(pv.Interface()); err == nil {
 		if err := tm.writeExtensions(w, pv); err != nil {
 			return err
 		}
@@ -464,27 +456,6 @@
 	return nil
 }
 
-// writeRaw writes an uninterpreted raw message.
-func writeRaw(w *textWriter, b []byte) error {
-	if err := w.WriteByte('<'); err != nil {
-		return err
-	}
-	if !w.compact {
-		if err := w.WriteByte('\n'); err != nil {
-			return err
-		}
-	}
-	w.indent()
-	if err := writeUnknownStruct(w, b); err != nil {
-		return err
-	}
-	w.unindent()
-	if err := w.WriteByte('>'); err != nil {
-		return err
-	}
-	return nil
-}
-
 // writeAny writes an arbitrary field.
 func (tm *TextMarshaler) writeAny(w *textWriter, v reflect.Value, props *Properties) error {
 	v = reflect.Indirect(v)
@@ -535,6 +506,19 @@
 			}
 		}
 		w.indent()
+		if v.CanAddr() {
+			// Calling v.Interface on a struct causes the reflect package to
+			// copy the entire struct. This is racy with the new Marshaler
+			// since we atomically update the XXX_sizecache.
+			//
+			// Thus, we retrieve a pointer to the struct if possible to avoid
+			// a race since v.Interface on the pointer doesn't copy the struct.
+			//
+			// If v is not addressable, then we are not worried about a race
+			// since it implies that the binary Marshaler cannot possibly be
+			// mutating this value.
+			v = v.Addr()
+		}
 		if etm, ok := v.Interface().(encoding.TextMarshaler); ok {
 			text, err := etm.MarshalText()
 			if err != nil {
@@ -543,8 +527,13 @@
 			if _, err = w.Write(text); err != nil {
 				return err
 			}
-		} else if err := tm.writeStruct(w, v); err != nil {
-			return err
+		} else {
+			if v.Kind() == reflect.Ptr {
+				v = v.Elem()
+			}
+			if err := tm.writeStruct(w, v); err != nil {
+				return err
+			}
 		}
 		w.unindent()
 		if err := w.WriteByte(ket); err != nil {
diff --git a/proto/text_parser.go b/proto/text_parser.go
index 5e14513..0685bae 100644
--- a/proto/text_parser.go
+++ b/proto/text_parser.go
@@ -206,7 +206,6 @@
 
 var (
 	errBadUTF8 = errors.New("proto: bad UTF-8")
-	errBadHex  = errors.New("proto: bad hexadecimal")
 )
 
 func unquoteC(s string, quote rune) (string, error) {
@@ -277,60 +276,47 @@
 		return "?", s, nil // trigraph workaround
 	case '\'', '"', '\\':
 		return string(r), s, nil
-	case '0', '1', '2', '3', '4', '5', '6', '7', 'x', 'X':
+	case '0', '1', '2', '3', '4', '5', '6', '7':
 		if len(s) < 2 {
 			return "", "", fmt.Errorf(`\%c requires 2 following digits`, r)
 		}
-		base := 8
-		ss := s[:2]
+		ss := string(r) + s[:2]
 		s = s[2:]
-		if r == 'x' || r == 'X' {
-			base = 16
-		} else {
-			ss = string(r) + ss
-		}
-		i, err := strconv.ParseUint(ss, base, 8)
+		i, err := strconv.ParseUint(ss, 8, 8)
 		if err != nil {
-			return "", "", err
+			return "", "", fmt.Errorf(`\%s contains non-octal digits`, ss)
 		}
 		return string([]byte{byte(i)}), s, nil
-	case 'u', 'U':
-		n := 4
-		if r == 'U' {
+	case 'x', 'X', 'u', 'U':
+		var n int
+		switch r {
+		case 'x', 'X':
+			n = 2
+		case 'u':
+			n = 4
+		case 'U':
 			n = 8
 		}
 		if len(s) < n {
-			return "", "", fmt.Errorf(`\%c requires %d digits`, r, n)
+			return "", "", fmt.Errorf(`\%c requires %d following digits`, r, n)
 		}
-
-		bs := make([]byte, n/2)
-		for i := 0; i < n; i += 2 {
-			a, ok1 := unhex(s[i])
-			b, ok2 := unhex(s[i+1])
-			if !ok1 || !ok2 {
-				return "", "", errBadHex
-			}
-			bs[i/2] = a<<4 | b
-		}
+		ss := s[:n]
 		s = s[n:]
-		return string(bs), s, nil
+		i, err := strconv.ParseUint(ss, 16, 64)
+		if err != nil {
+			return "", "", fmt.Errorf(`\%c%s contains non-hexadecimal digits`, r, ss)
+		}
+		if r == 'x' || r == 'X' {
+			return string([]byte{byte(i)}), s, nil
+		}
+		if i > utf8.MaxRune {
+			return "", "", fmt.Errorf(`\%c%s is not a valid Unicode code point`, r, ss)
+		}
+		return string(i), s, nil
 	}
 	return "", "", fmt.Errorf(`unknown escape \%c`, r)
 }
 
-// Adapted from src/pkg/strconv/quote.go.
-func unhex(b byte) (v byte, ok bool) {
-	switch {
-	case '0' <= b && b <= '9':
-		return b - '0', true
-	case 'a' <= b && b <= 'f':
-		return b - 'a' + 10, true
-	case 'A' <= b && b <= 'F':
-		return b - 'A' + 10, true
-	}
-	return 0, false
-}
-
 // Back off the parser by one token. Can only be done between calls to next().
 // It makes the next advance() a no-op.
 func (p *textParser) back() { p.backed = true }
@@ -728,6 +714,9 @@
 		if tok.err != nil {
 			return "", p.errorf("unrecognized type_url or extension name: %s", tok.err)
 		}
+		if p.done && tok.value != "]" {
+			return "", p.errorf("unclosed type_url or extension name")
+		}
 	}
 	return strings.Join(parts, ""), nil
 }
@@ -865,7 +854,7 @@
 		return p.readStruct(fv, terminator)
 	case reflect.Uint32:
 		if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
-			fv.SetUint(x)
+			fv.SetUint(uint64(x))
 			return nil
 		}
 	case reflect.Uint64:
@@ -883,13 +872,9 @@
 // UnmarshalText returns *RequiredNotSetError.
 func UnmarshalText(s string, pb Message) error {
 	if um, ok := pb.(encoding.TextUnmarshaler); ok {
-		err := um.UnmarshalText([]byte(s))
-		return err
+		return um.UnmarshalText([]byte(s))
 	}
 	pb.Reset()
 	v := reflect.ValueOf(pb)
-	if pe := newTextParser(s).readStruct(v.Elem(), ""); pe != nil {
-		return pe
-	}
-	return nil
+	return newTextParser(s).readStruct(v.Elem(), "")
 }
diff --git a/proto/text_parser_test.go b/proto/text_parser_test.go
index 8f7cb4d..a819808 100644
--- a/proto/text_parser_test.go
+++ b/proto/text_parser_test.go
@@ -32,13 +32,13 @@
 package proto_test
 
 import (
+	"fmt"
 	"math"
-	"reflect"
 	"testing"
 
 	. "github.com/golang/protobuf/proto"
 	proto3pb "github.com/golang/protobuf/proto/proto3_proto"
-	. "github.com/golang/protobuf/proto/testdata"
+	. "github.com/golang/protobuf/proto/test_proto"
 )
 
 type UnmarshalTextTest struct {
@@ -167,10 +167,19 @@
 
 	// Quoted string with UTF-8 bytes.
 	{
-		in: "count:42 name: '\303\277\302\201\xAB'",
+		in: "count:42 name: '\303\277\302\201\x00\xAB\xCD\xEF'",
 		out: &MyMessage{
 			Count: Int32(42),
-			Name:  String("\303\277\302\201\xAB"),
+			Name:  String("\303\277\302\201\x00\xAB\xCD\xEF"),
+		},
+	},
+
+	// Quoted string with unicode escapes.
+	{
+		in: `count: 42 name: "\u0047\U00000047\uffff\U0010ffff"`,
+		out: &MyMessage{
+			Count: Int32(42),
+			Name:  String("GG\uffff\U0010ffff"),
 		},
 	},
 
@@ -180,6 +189,24 @@
 		err: `line 1.15: invalid quoted string "\0": \0 requires 2 following digits`,
 	},
 
+	// Bad \u escape
+	{
+		in:  `count: 42 name: "\u000"`,
+		err: `line 1.16: invalid quoted string "\u000": \u requires 4 following digits`,
+	},
+
+	// Bad \U escape
+	{
+		in:  `count: 42 name: "\U0000000"`,
+		err: `line 1.16: invalid quoted string "\U0000000": \U requires 8 following digits`,
+	},
+
+	// Bad \U escape
+	{
+		in:  `count: 42 name: "\xxx"`,
+		err: `line 1.16: invalid quoted string "\xxx": \xxx contains non-hexadecimal digits`,
+	},
+
 	// Number too large for int64
 	{
 		in:  "count: 1 others { key: 123456789012345678901 }",
@@ -263,6 +290,12 @@
 		err: `line 1.17: invalid float32: "17.4"`,
 	},
 
+	// unclosed bracket doesn't cause infinite loop
+	{
+		in:  `[`,
+		err: `line 1.0: unclosed type_url or extension name`,
+	},
+
 	// Enum
 	{
 		in: `count:42 bikeshed: BLUE`,
@@ -330,7 +363,7 @@
 	// Missing required field
 	{
 		in:  `name: "Pawel"`,
-		err: `proto: required field "testdata.MyMessage.count" not set`,
+		err: fmt.Sprintf(`proto: required field "%T.count" not set`, MyMessage{}),
 		out: &MyMessage{
 			Name: String("Pawel"),
 		},
@@ -339,7 +372,7 @@
 	// Missing required field in a required submessage
 	{
 		in:  `count: 42 we_must_go_deeper < leo_finally_won_an_oscar <> >`,
-		err: `proto: required field "testdata.InnerMessage.host" not set`,
+		err: fmt.Sprintf(`proto: required field "%T.host" not set`, InnerMessage{}),
 		out: &MyMessage{
 			Count:          Int32(42),
 			WeMustGoDeeper: &RequiredInnerMessage{LeoFinallyWonAnOscar: &InnerMessage{}},
@@ -470,10 +503,10 @@
 	},
 
 	// Extension
-	buildExtStructTest(`count: 42 [testdata.Ext.more]:<data:"Hello, world!" >`),
-	buildExtStructTest(`count: 42 [testdata.Ext.more] {data:"Hello, world!"}`),
-	buildExtDataTest(`count: 42 [testdata.Ext.text]:"Hello, world!" [testdata.Ext.number]:1729`),
-	buildExtRepStringTest(`count: 42 [testdata.greeting]:"bula" [testdata.greeting]:"hola"`),
+	buildExtStructTest(`count: 42 [test_proto.Ext.more]:<data:"Hello, world!" >`),
+	buildExtStructTest(`count: 42 [test_proto.Ext.more] {data:"Hello, world!"}`),
+	buildExtDataTest(`count: 42 [test_proto.Ext.text]:"Hello, world!" [test_proto.Ext.number]:1729`),
+	buildExtRepStringTest(`count: 42 [test_proto.greeting]:"bula" [test_proto.greeting]:"hola"`),
 
 	// Big all-in-one
 	{
@@ -534,7 +567,7 @@
 			// We don't expect failure.
 			if err != nil {
 				t.Errorf("Test %d: Unexpected error: %v", i, err)
-			} else if !reflect.DeepEqual(pb, test.out) {
+			} else if !Equal(pb, test.out) {
 				t.Errorf("Test %d: Incorrect populated \nHave: %v\nWant: %v",
 					i, pb, test.out)
 			}
@@ -545,7 +578,7 @@
 			} else if err.Error() != test.err {
 				t.Errorf("Test %d: Incorrect error.\nHave: %v\nWant: %v",
 					i, err.Error(), test.err)
-			} else if _, ok := err.(*RequiredNotSetError); ok && test.out != nil && !reflect.DeepEqual(pb, test.out) {
+			} else if _, ok := err.(*RequiredNotSetError); ok && test.out != nil && !Equal(pb, test.out) {
 				t.Errorf("Test %d: Incorrect populated \nHave: %v\nWant: %v",
 					i, pb, test.out)
 			}
diff --git a/proto/text_test.go b/proto/text_test.go
index 3eabaca..3c8b033 100644
--- a/proto/text_test.go
+++ b/proto/text_test.go
@@ -37,12 +37,14 @@
 	"io/ioutil"
 	"math"
 	"strings"
+	"sync"
 	"testing"
 
 	"github.com/golang/protobuf/proto"
 
 	proto3pb "github.com/golang/protobuf/proto/proto3_proto"
-	pb "github.com/golang/protobuf/proto/testdata"
+	pb "github.com/golang/protobuf/proto/test_proto"
+	anypb "github.com/golang/protobuf/ptypes/any"
 )
 
 // textMessage implements the methods that allow it to marshal and unmarshal
@@ -151,12 +153,12 @@
 }
 /* 2 unknown bytes */
 13: 4
-[testdata.Ext.more]: <
+[test_proto.Ext.more]: <
   data: "Big gobs for big rats"
 >
-[testdata.greeting]: "adg"
-[testdata.greeting]: "easy"
-[testdata.greeting]: "cow"
+[test_proto.greeting]: "adg"
+[test_proto.greeting]: "easy"
+[test_proto.greeting]: "cow"
 /* 13 unknown bytes */
 201: "\t3G skiing"
 /* 3 unknown bytes */
@@ -472,3 +474,45 @@
 		}
 	}
 }
+
+func TestRacyMarshal(t *testing.T) {
+	// This test should be run with the race detector.
+
+	any := &pb.MyMessage{Count: proto.Int32(47), Name: proto.String("David")}
+	proto.SetExtension(any, pb.E_Ext_Text, proto.String("bar"))
+	b, err := proto.Marshal(any)
+	if err != nil {
+		panic(err)
+	}
+	m := &proto3pb.Message{
+		Name:        "David",
+		ResultCount: 47,
+		Anything:    &anypb.Any{TypeUrl: "type.googleapis.com/" + proto.MessageName(any), Value: b},
+	}
+
+	wantText := proto.MarshalTextString(m)
+	wantBytes, err := proto.Marshal(m)
+	if err != nil {
+		t.Fatalf("proto.Marshal error: %v", err)
+	}
+
+	var wg sync.WaitGroup
+	defer wg.Wait()
+	wg.Add(20)
+	for i := 0; i < 10; i++ {
+		go func() {
+			defer wg.Done()
+			got := proto.MarshalTextString(m)
+			if got != wantText {
+				t.Errorf("proto.MarshalTextString = %q, want %q", got, wantText)
+			}
+		}()
+		go func() {
+			defer wg.Done()
+			got, err := proto.Marshal(m)
+			if !bytes.Equal(got, wantBytes) || err != nil {
+				t.Errorf("proto.Marshal = (%x, %v), want (%x, nil)", got, err, wantBytes)
+			}
+		}()
+	}
+}
diff --git a/protoc-gen-go/Makefile b/protoc-gen-go/Makefile
deleted file mode 100644
index a42cc37..0000000
--- a/protoc-gen-go/Makefile
+++ /dev/null
@@ -1,33 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-test:
-	cd testdata && make test
diff --git a/protoc-gen-go/descriptor/Makefile b/protoc-gen-go/descriptor/Makefile
deleted file mode 100644
index f706871..0000000
--- a/protoc-gen-go/descriptor/Makefile
+++ /dev/null
@@ -1,37 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-# Not stored here, but descriptor.proto is in https://github.com/google/protobuf/
-# at src/google/protobuf/descriptor.proto
-regenerate:
-	@echo WARNING! THIS RULE IS PROBABLY NOT RIGHT FOR YOUR INSTALLATION
-	cp $(HOME)/src/protobuf/include/google/protobuf/descriptor.proto .
-	protoc --go_out=../../../../.. -I$(HOME)/src/protobuf/include $(HOME)/src/protobuf/include/google/protobuf/descriptor.proto
diff --git a/protoc-gen-go/descriptor/descriptor.pb.go b/protoc-gen-go/descriptor/descriptor.pb.go
index c6a91bc..e855b1f 100644
--- a/protoc-gen-go/descriptor/descriptor.pb.go
+++ b/protoc-gen-go/descriptor/descriptor.pb.go
@@ -1,36 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: google/protobuf/descriptor.proto
 
-/*
-Package descriptor is a generated protocol buffer package.
-
-It is generated from these files:
-	google/protobuf/descriptor.proto
-
-It has these top-level messages:
-	FileDescriptorSet
-	FileDescriptorProto
-	DescriptorProto
-	ExtensionRangeOptions
-	FieldDescriptorProto
-	OneofDescriptorProto
-	EnumDescriptorProto
-	EnumValueDescriptorProto
-	ServiceDescriptorProto
-	MethodDescriptorProto
-	FileOptions
-	MessageOptions
-	FieldOptions
-	OneofOptions
-	EnumOptions
-	EnumValueOptions
-	ServiceOptions
-	MethodOptions
-	UninterpretedOption
-	SourceCodeInfo
-	GeneratedCodeInfo
-*/
-package descriptor
+package descriptor // import "github.com/golang/protobuf/protoc-gen-go/descriptor"
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -138,7 +109,9 @@
 	*x = FieldDescriptorProto_Type(value)
 	return nil
 }
-func (FieldDescriptorProto_Type) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{4, 0} }
+func (FieldDescriptorProto_Type) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{4, 0}
+}
 
 type FieldDescriptorProto_Label int32
 
@@ -177,7 +150,7 @@
 	return nil
 }
 func (FieldDescriptorProto_Label) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{4, 1}
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{4, 1}
 }
 
 // Generated classes can be optimized for speed or code size.
@@ -217,7 +190,9 @@
 	*x = FileOptions_OptimizeMode(value)
 	return nil
 }
-func (FileOptions_OptimizeMode) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{10, 0} }
+func (FileOptions_OptimizeMode) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{10, 0}
+}
 
 type FieldOptions_CType int32
 
@@ -255,7 +230,9 @@
 	*x = FieldOptions_CType(value)
 	return nil
 }
-func (FieldOptions_CType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{12, 0} }
+func (FieldOptions_CType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{12, 0}
+}
 
 type FieldOptions_JSType int32
 
@@ -295,7 +272,9 @@
 	*x = FieldOptions_JSType(value)
 	return nil
 }
-func (FieldOptions_JSType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{12, 1} }
+func (FieldOptions_JSType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{12, 1}
+}
 
 // Is this method side-effect-free (or safe in HTTP parlance), or idempotent,
 // or neither? HTTP based RPC implementation may choose GET verb for safe
@@ -336,20 +315,41 @@
 	return nil
 }
 func (MethodOptions_IdempotencyLevel) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{17, 0}
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{17, 0}
 }
 
 // The protocol compiler can output a FileDescriptorSet containing the .proto
 // files it parses.
 type FileDescriptorSet struct {
-	File             []*FileDescriptorProto `protobuf:"bytes,1,rep,name=file" json:"file,omitempty"`
-	XXX_unrecognized []byte                 `json:"-"`
+	File                 []*FileDescriptorProto `protobuf:"bytes,1,rep,name=file" json:"file,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}               `json:"-"`
+	XXX_unrecognized     []byte                 `json:"-"`
+	XXX_sizecache        int32                  `json:"-"`
 }
 
-func (m *FileDescriptorSet) Reset()                    { *m = FileDescriptorSet{} }
-func (m *FileDescriptorSet) String() string            { return proto.CompactTextString(m) }
-func (*FileDescriptorSet) ProtoMessage()               {}
-func (*FileDescriptorSet) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+func (m *FileDescriptorSet) Reset()         { *m = FileDescriptorSet{} }
+func (m *FileDescriptorSet) String() string { return proto.CompactTextString(m) }
+func (*FileDescriptorSet) ProtoMessage()    {}
+func (*FileDescriptorSet) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{0}
+}
+func (m *FileDescriptorSet) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FileDescriptorSet.Unmarshal(m, b)
+}
+func (m *FileDescriptorSet) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FileDescriptorSet.Marshal(b, m, deterministic)
+}
+func (dst *FileDescriptorSet) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FileDescriptorSet.Merge(dst, src)
+}
+func (m *FileDescriptorSet) XXX_Size() int {
+	return xxx_messageInfo_FileDescriptorSet.Size(m)
+}
+func (m *FileDescriptorSet) XXX_DiscardUnknown() {
+	xxx_messageInfo_FileDescriptorSet.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FileDescriptorSet proto.InternalMessageInfo
 
 func (m *FileDescriptorSet) GetFile() []*FileDescriptorProto {
 	if m != nil {
@@ -382,14 +382,35 @@
 	SourceCodeInfo *SourceCodeInfo `protobuf:"bytes,9,opt,name=source_code_info,json=sourceCodeInfo" json:"source_code_info,omitempty"`
 	// The syntax of the proto file.
 	// The supported values are "proto2" and "proto3".
-	Syntax           *string `protobuf:"bytes,12,opt,name=syntax" json:"syntax,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+	Syntax               *string  `protobuf:"bytes,12,opt,name=syntax" json:"syntax,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *FileDescriptorProto) Reset()                    { *m = FileDescriptorProto{} }
-func (m *FileDescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*FileDescriptorProto) ProtoMessage()               {}
-func (*FileDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+func (m *FileDescriptorProto) Reset()         { *m = FileDescriptorProto{} }
+func (m *FileDescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*FileDescriptorProto) ProtoMessage()    {}
+func (*FileDescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{1}
+}
+func (m *FileDescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FileDescriptorProto.Unmarshal(m, b)
+}
+func (m *FileDescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FileDescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *FileDescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FileDescriptorProto.Merge(dst, src)
+}
+func (m *FileDescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_FileDescriptorProto.Size(m)
+}
+func (m *FileDescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_FileDescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FileDescriptorProto proto.InternalMessageInfo
 
 func (m *FileDescriptorProto) GetName() string {
 	if m != nil && m.Name != nil {
@@ -488,14 +509,35 @@
 	ReservedRange  []*DescriptorProto_ReservedRange  `protobuf:"bytes,9,rep,name=reserved_range,json=reservedRange" json:"reserved_range,omitempty"`
 	// Reserved field names, which may not be used by fields in the same message.
 	// A given name may only be reserved once.
-	ReservedName     []string `protobuf:"bytes,10,rep,name=reserved_name,json=reservedName" json:"reserved_name,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
+	ReservedName         []string `protobuf:"bytes,10,rep,name=reserved_name,json=reservedName" json:"reserved_name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *DescriptorProto) Reset()                    { *m = DescriptorProto{} }
-func (m *DescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*DescriptorProto) ProtoMessage()               {}
-func (*DescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+func (m *DescriptorProto) Reset()         { *m = DescriptorProto{} }
+func (m *DescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*DescriptorProto) ProtoMessage()    {}
+func (*DescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{2}
+}
+func (m *DescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DescriptorProto.Unmarshal(m, b)
+}
+func (m *DescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *DescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DescriptorProto.Merge(dst, src)
+}
+func (m *DescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_DescriptorProto.Size(m)
+}
+func (m *DescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_DescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DescriptorProto proto.InternalMessageInfo
 
 func (m *DescriptorProto) GetName() string {
 	if m != nil && m.Name != nil {
@@ -568,18 +610,37 @@
 }
 
 type DescriptorProto_ExtensionRange struct {
-	Start            *int32                 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
-	End              *int32                 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
-	Options          *ExtensionRangeOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
-	XXX_unrecognized []byte                 `json:"-"`
+	Start                *int32                 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
+	End                  *int32                 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
+	Options              *ExtensionRangeOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}               `json:"-"`
+	XXX_unrecognized     []byte                 `json:"-"`
+	XXX_sizecache        int32                  `json:"-"`
 }
 
 func (m *DescriptorProto_ExtensionRange) Reset()         { *m = DescriptorProto_ExtensionRange{} }
 func (m *DescriptorProto_ExtensionRange) String() string { return proto.CompactTextString(m) }
 func (*DescriptorProto_ExtensionRange) ProtoMessage()    {}
 func (*DescriptorProto_ExtensionRange) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{2, 0}
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{2, 0}
 }
+func (m *DescriptorProto_ExtensionRange) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DescriptorProto_ExtensionRange.Unmarshal(m, b)
+}
+func (m *DescriptorProto_ExtensionRange) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DescriptorProto_ExtensionRange.Marshal(b, m, deterministic)
+}
+func (dst *DescriptorProto_ExtensionRange) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DescriptorProto_ExtensionRange.Merge(dst, src)
+}
+func (m *DescriptorProto_ExtensionRange) XXX_Size() int {
+	return xxx_messageInfo_DescriptorProto_ExtensionRange.Size(m)
+}
+func (m *DescriptorProto_ExtensionRange) XXX_DiscardUnknown() {
+	xxx_messageInfo_DescriptorProto_ExtensionRange.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DescriptorProto_ExtensionRange proto.InternalMessageInfo
 
 func (m *DescriptorProto_ExtensionRange) GetStart() int32 {
 	if m != nil && m.Start != nil {
@@ -606,17 +667,36 @@
 // fields or extension ranges in the same message. Reserved ranges may
 // not overlap.
 type DescriptorProto_ReservedRange struct {
-	Start            *int32 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
-	End              *int32 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
+	Start                *int32   `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
+	End                  *int32   `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *DescriptorProto_ReservedRange) Reset()         { *m = DescriptorProto_ReservedRange{} }
 func (m *DescriptorProto_ReservedRange) String() string { return proto.CompactTextString(m) }
 func (*DescriptorProto_ReservedRange) ProtoMessage()    {}
 func (*DescriptorProto_ReservedRange) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{2, 1}
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{2, 1}
 }
+func (m *DescriptorProto_ReservedRange) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DescriptorProto_ReservedRange.Unmarshal(m, b)
+}
+func (m *DescriptorProto_ReservedRange) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DescriptorProto_ReservedRange.Marshal(b, m, deterministic)
+}
+func (dst *DescriptorProto_ReservedRange) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DescriptorProto_ReservedRange.Merge(dst, src)
+}
+func (m *DescriptorProto_ReservedRange) XXX_Size() int {
+	return xxx_messageInfo_DescriptorProto_ReservedRange.Size(m)
+}
+func (m *DescriptorProto_ReservedRange) XXX_DiscardUnknown() {
+	xxx_messageInfo_DescriptorProto_ReservedRange.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DescriptorProto_ReservedRange proto.InternalMessageInfo
 
 func (m *DescriptorProto_ReservedRange) GetStart() int32 {
 	if m != nil && m.Start != nil {
@@ -635,22 +715,43 @@
 type ExtensionRangeOptions struct {
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *ExtensionRangeOptions) Reset()                    { *m = ExtensionRangeOptions{} }
-func (m *ExtensionRangeOptions) String() string            { return proto.CompactTextString(m) }
-func (*ExtensionRangeOptions) ProtoMessage()               {}
-func (*ExtensionRangeOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+func (m *ExtensionRangeOptions) Reset()         { *m = ExtensionRangeOptions{} }
+func (m *ExtensionRangeOptions) String() string { return proto.CompactTextString(m) }
+func (*ExtensionRangeOptions) ProtoMessage()    {}
+func (*ExtensionRangeOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{3}
+}
 
 var extRange_ExtensionRangeOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*ExtensionRangeOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_ExtensionRangeOptions
 }
+func (m *ExtensionRangeOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ExtensionRangeOptions.Unmarshal(m, b)
+}
+func (m *ExtensionRangeOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ExtensionRangeOptions.Marshal(b, m, deterministic)
+}
+func (dst *ExtensionRangeOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ExtensionRangeOptions.Merge(dst, src)
+}
+func (m *ExtensionRangeOptions) XXX_Size() int {
+	return xxx_messageInfo_ExtensionRangeOptions.Size(m)
+}
+func (m *ExtensionRangeOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_ExtensionRangeOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ExtensionRangeOptions proto.InternalMessageInfo
 
 func (m *ExtensionRangeOptions) GetUninterpretedOption() []*UninterpretedOption {
 	if m != nil {
@@ -689,15 +790,36 @@
 	// user has set a "json_name" option on this field, that option's value
 	// will be used. Otherwise, it's deduced from the field's name by converting
 	// it to camelCase.
-	JsonName         *string       `protobuf:"bytes,10,opt,name=json_name,json=jsonName" json:"json_name,omitempty"`
-	Options          *FieldOptions `protobuf:"bytes,8,opt,name=options" json:"options,omitempty"`
-	XXX_unrecognized []byte        `json:"-"`
+	JsonName             *string       `protobuf:"bytes,10,opt,name=json_name,json=jsonName" json:"json_name,omitempty"`
+	Options              *FieldOptions `protobuf:"bytes,8,opt,name=options" json:"options,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}      `json:"-"`
+	XXX_unrecognized     []byte        `json:"-"`
+	XXX_sizecache        int32         `json:"-"`
 }
 
-func (m *FieldDescriptorProto) Reset()                    { *m = FieldDescriptorProto{} }
-func (m *FieldDescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*FieldDescriptorProto) ProtoMessage()               {}
-func (*FieldDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+func (m *FieldDescriptorProto) Reset()         { *m = FieldDescriptorProto{} }
+func (m *FieldDescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*FieldDescriptorProto) ProtoMessage()    {}
+func (*FieldDescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{4}
+}
+func (m *FieldDescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FieldDescriptorProto.Unmarshal(m, b)
+}
+func (m *FieldDescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FieldDescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *FieldDescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FieldDescriptorProto.Merge(dst, src)
+}
+func (m *FieldDescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_FieldDescriptorProto.Size(m)
+}
+func (m *FieldDescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_FieldDescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FieldDescriptorProto proto.InternalMessageInfo
 
 func (m *FieldDescriptorProto) GetName() string {
 	if m != nil && m.Name != nil {
@@ -771,15 +893,36 @@
 
 // Describes a oneof.
 type OneofDescriptorProto struct {
-	Name             *string       `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	Options          *OneofOptions `protobuf:"bytes,2,opt,name=options" json:"options,omitempty"`
-	XXX_unrecognized []byte        `json:"-"`
+	Name                 *string       `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Options              *OneofOptions `protobuf:"bytes,2,opt,name=options" json:"options,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}      `json:"-"`
+	XXX_unrecognized     []byte        `json:"-"`
+	XXX_sizecache        int32         `json:"-"`
 }
 
-func (m *OneofDescriptorProto) Reset()                    { *m = OneofDescriptorProto{} }
-func (m *OneofDescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*OneofDescriptorProto) ProtoMessage()               {}
-func (*OneofDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+func (m *OneofDescriptorProto) Reset()         { *m = OneofDescriptorProto{} }
+func (m *OneofDescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*OneofDescriptorProto) ProtoMessage()    {}
+func (*OneofDescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{5}
+}
+func (m *OneofDescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OneofDescriptorProto.Unmarshal(m, b)
+}
+func (m *OneofDescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OneofDescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *OneofDescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OneofDescriptorProto.Merge(dst, src)
+}
+func (m *OneofDescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_OneofDescriptorProto.Size(m)
+}
+func (m *OneofDescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_OneofDescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OneofDescriptorProto proto.InternalMessageInfo
 
 func (m *OneofDescriptorProto) GetName() string {
 	if m != nil && m.Name != nil {
@@ -797,16 +940,44 @@
 
 // Describes an enum type.
 type EnumDescriptorProto struct {
-	Name             *string                     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	Value            []*EnumValueDescriptorProto `protobuf:"bytes,2,rep,name=value" json:"value,omitempty"`
-	Options          *EnumOptions                `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
-	XXX_unrecognized []byte                      `json:"-"`
+	Name    *string                     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Value   []*EnumValueDescriptorProto `protobuf:"bytes,2,rep,name=value" json:"value,omitempty"`
+	Options *EnumOptions                `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	// Range of reserved numeric values. Reserved numeric values may not be used
+	// by enum values in the same enum declaration. Reserved ranges may not
+	// overlap.
+	ReservedRange []*EnumDescriptorProto_EnumReservedRange `protobuf:"bytes,4,rep,name=reserved_range,json=reservedRange" json:"reserved_range,omitempty"`
+	// Reserved enum value names, which may not be reused. A given name may only
+	// be reserved once.
+	ReservedName         []string `protobuf:"bytes,5,rep,name=reserved_name,json=reservedName" json:"reserved_name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *EnumDescriptorProto) Reset()                    { *m = EnumDescriptorProto{} }
-func (m *EnumDescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*EnumDescriptorProto) ProtoMessage()               {}
-func (*EnumDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+func (m *EnumDescriptorProto) Reset()         { *m = EnumDescriptorProto{} }
+func (m *EnumDescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*EnumDescriptorProto) ProtoMessage()    {}
+func (*EnumDescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{6}
+}
+func (m *EnumDescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_EnumDescriptorProto.Unmarshal(m, b)
+}
+func (m *EnumDescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_EnumDescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *EnumDescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EnumDescriptorProto.Merge(dst, src)
+}
+func (m *EnumDescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_EnumDescriptorProto.Size(m)
+}
+func (m *EnumDescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_EnumDescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EnumDescriptorProto proto.InternalMessageInfo
 
 func (m *EnumDescriptorProto) GetName() string {
 	if m != nil && m.Name != nil {
@@ -829,18 +1000,105 @@
 	return nil
 }
 
-// Describes a value within an enum.
-type EnumValueDescriptorProto struct {
-	Name             *string           `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	Number           *int32            `protobuf:"varint,2,opt,name=number" json:"number,omitempty"`
-	Options          *EnumValueOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
-	XXX_unrecognized []byte            `json:"-"`
+func (m *EnumDescriptorProto) GetReservedRange() []*EnumDescriptorProto_EnumReservedRange {
+	if m != nil {
+		return m.ReservedRange
+	}
+	return nil
 }
 
-func (m *EnumValueDescriptorProto) Reset()                    { *m = EnumValueDescriptorProto{} }
-func (m *EnumValueDescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*EnumValueDescriptorProto) ProtoMessage()               {}
-func (*EnumValueDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+func (m *EnumDescriptorProto) GetReservedName() []string {
+	if m != nil {
+		return m.ReservedName
+	}
+	return nil
+}
+
+// Range of reserved numeric values. Reserved values may not be used by
+// entries in the same enum. Reserved ranges may not overlap.
+//
+// Note that this is distinct from DescriptorProto.ReservedRange in that it
+// is inclusive such that it can appropriately represent the entire int32
+// domain.
+type EnumDescriptorProto_EnumReservedRange struct {
+	Start                *int32   `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
+	End                  *int32   `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *EnumDescriptorProto_EnumReservedRange) Reset()         { *m = EnumDescriptorProto_EnumReservedRange{} }
+func (m *EnumDescriptorProto_EnumReservedRange) String() string { return proto.CompactTextString(m) }
+func (*EnumDescriptorProto_EnumReservedRange) ProtoMessage()    {}
+func (*EnumDescriptorProto_EnumReservedRange) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{6, 0}
+}
+func (m *EnumDescriptorProto_EnumReservedRange) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_EnumDescriptorProto_EnumReservedRange.Unmarshal(m, b)
+}
+func (m *EnumDescriptorProto_EnumReservedRange) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_EnumDescriptorProto_EnumReservedRange.Marshal(b, m, deterministic)
+}
+func (dst *EnumDescriptorProto_EnumReservedRange) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EnumDescriptorProto_EnumReservedRange.Merge(dst, src)
+}
+func (m *EnumDescriptorProto_EnumReservedRange) XXX_Size() int {
+	return xxx_messageInfo_EnumDescriptorProto_EnumReservedRange.Size(m)
+}
+func (m *EnumDescriptorProto_EnumReservedRange) XXX_DiscardUnknown() {
+	xxx_messageInfo_EnumDescriptorProto_EnumReservedRange.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EnumDescriptorProto_EnumReservedRange proto.InternalMessageInfo
+
+func (m *EnumDescriptorProto_EnumReservedRange) GetStart() int32 {
+	if m != nil && m.Start != nil {
+		return *m.Start
+	}
+	return 0
+}
+
+func (m *EnumDescriptorProto_EnumReservedRange) GetEnd() int32 {
+	if m != nil && m.End != nil {
+		return *m.End
+	}
+	return 0
+}
+
+// Describes a value within an enum.
+type EnumValueDescriptorProto struct {
+	Name                 *string           `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Number               *int32            `protobuf:"varint,2,opt,name=number" json:"number,omitempty"`
+	Options              *EnumValueOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
+}
+
+func (m *EnumValueDescriptorProto) Reset()         { *m = EnumValueDescriptorProto{} }
+func (m *EnumValueDescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*EnumValueDescriptorProto) ProtoMessage()    {}
+func (*EnumValueDescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{7}
+}
+func (m *EnumValueDescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_EnumValueDescriptorProto.Unmarshal(m, b)
+}
+func (m *EnumValueDescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_EnumValueDescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *EnumValueDescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EnumValueDescriptorProto.Merge(dst, src)
+}
+func (m *EnumValueDescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_EnumValueDescriptorProto.Size(m)
+}
+func (m *EnumValueDescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_EnumValueDescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EnumValueDescriptorProto proto.InternalMessageInfo
 
 func (m *EnumValueDescriptorProto) GetName() string {
 	if m != nil && m.Name != nil {
@@ -865,16 +1123,37 @@
 
 // Describes a service.
 type ServiceDescriptorProto struct {
-	Name             *string                  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	Method           []*MethodDescriptorProto `protobuf:"bytes,2,rep,name=method" json:"method,omitempty"`
-	Options          *ServiceOptions          `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
-	XXX_unrecognized []byte                   `json:"-"`
+	Name                 *string                  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Method               []*MethodDescriptorProto `protobuf:"bytes,2,rep,name=method" json:"method,omitempty"`
+	Options              *ServiceOptions          `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                 `json:"-"`
+	XXX_unrecognized     []byte                   `json:"-"`
+	XXX_sizecache        int32                    `json:"-"`
 }
 
-func (m *ServiceDescriptorProto) Reset()                    { *m = ServiceDescriptorProto{} }
-func (m *ServiceDescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*ServiceDescriptorProto) ProtoMessage()               {}
-func (*ServiceDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+func (m *ServiceDescriptorProto) Reset()         { *m = ServiceDescriptorProto{} }
+func (m *ServiceDescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*ServiceDescriptorProto) ProtoMessage()    {}
+func (*ServiceDescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{8}
+}
+func (m *ServiceDescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServiceDescriptorProto.Unmarshal(m, b)
+}
+func (m *ServiceDescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServiceDescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *ServiceDescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServiceDescriptorProto.Merge(dst, src)
+}
+func (m *ServiceDescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_ServiceDescriptorProto.Size(m)
+}
+func (m *ServiceDescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServiceDescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServiceDescriptorProto proto.InternalMessageInfo
 
 func (m *ServiceDescriptorProto) GetName() string {
 	if m != nil && m.Name != nil {
@@ -908,14 +1187,35 @@
 	// Identifies if client streams multiple client messages
 	ClientStreaming *bool `protobuf:"varint,5,opt,name=client_streaming,json=clientStreaming,def=0" json:"client_streaming,omitempty"`
 	// Identifies if server streams multiple server messages
-	ServerStreaming  *bool  `protobuf:"varint,6,opt,name=server_streaming,json=serverStreaming,def=0" json:"server_streaming,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
+	ServerStreaming      *bool    `protobuf:"varint,6,opt,name=server_streaming,json=serverStreaming,def=0" json:"server_streaming,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *MethodDescriptorProto) Reset()                    { *m = MethodDescriptorProto{} }
-func (m *MethodDescriptorProto) String() string            { return proto.CompactTextString(m) }
-func (*MethodDescriptorProto) ProtoMessage()               {}
-func (*MethodDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
+func (m *MethodDescriptorProto) Reset()         { *m = MethodDescriptorProto{} }
+func (m *MethodDescriptorProto) String() string { return proto.CompactTextString(m) }
+func (*MethodDescriptorProto) ProtoMessage()    {}
+func (*MethodDescriptorProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{9}
+}
+func (m *MethodDescriptorProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MethodDescriptorProto.Unmarshal(m, b)
+}
+func (m *MethodDescriptorProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MethodDescriptorProto.Marshal(b, m, deterministic)
+}
+func (dst *MethodDescriptorProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MethodDescriptorProto.Merge(dst, src)
+}
+func (m *MethodDescriptorProto) XXX_Size() int {
+	return xxx_messageInfo_MethodDescriptorProto.Size(m)
+}
+func (m *MethodDescriptorProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_MethodDescriptorProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MethodDescriptorProto proto.InternalMessageInfo
 
 const Default_MethodDescriptorProto_ClientStreaming bool = false
 const Default_MethodDescriptorProto_ServerStreaming bool = false
@@ -982,7 +1282,7 @@
 	// top-level extensions defined in the file.
 	JavaMultipleFiles *bool `protobuf:"varint,10,opt,name=java_multiple_files,json=javaMultipleFiles,def=0" json:"java_multiple_files,omitempty"`
 	// This option does nothing.
-	JavaGenerateEqualsAndHash *bool `protobuf:"varint,20,opt,name=java_generate_equals_and_hash,json=javaGenerateEqualsAndHash" json:"java_generate_equals_and_hash,omitempty"`
+	JavaGenerateEqualsAndHash *bool `protobuf:"varint,20,opt,name=java_generate_equals_and_hash,json=javaGenerateEqualsAndHash" json:"java_generate_equals_and_hash,omitempty"` // Deprecated: Do not use.
 	// If set true, then the Java2 code generator will generate code that
 	// throws an exception whenever an attempt is made to assign a non-UTF-8
 	// byte sequence to a string field.
@@ -1036,24 +1336,46 @@
 	// is empty. When this option is empty, the package name will be used for
 	// determining the namespace.
 	PhpNamespace *string `protobuf:"bytes,41,opt,name=php_namespace,json=phpNamespace" json:"php_namespace,omitempty"`
-	// The parser stores options it doesn't recognize here. See above.
+	// The parser stores options it doesn't recognize here.
+	// See the documentation for the "Options" section above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *FileOptions) Reset()                    { *m = FileOptions{} }
-func (m *FileOptions) String() string            { return proto.CompactTextString(m) }
-func (*FileOptions) ProtoMessage()               {}
-func (*FileOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
+func (m *FileOptions) Reset()         { *m = FileOptions{} }
+func (m *FileOptions) String() string { return proto.CompactTextString(m) }
+func (*FileOptions) ProtoMessage()    {}
+func (*FileOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{10}
+}
 
 var extRange_FileOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*FileOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_FileOptions
 }
+func (m *FileOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FileOptions.Unmarshal(m, b)
+}
+func (m *FileOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FileOptions.Marshal(b, m, deterministic)
+}
+func (dst *FileOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FileOptions.Merge(dst, src)
+}
+func (m *FileOptions) XXX_Size() int {
+	return xxx_messageInfo_FileOptions.Size(m)
+}
+func (m *FileOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_FileOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FileOptions proto.InternalMessageInfo
 
 const Default_FileOptions_JavaMultipleFiles bool = false
 const Default_FileOptions_JavaStringCheckUtf8 bool = false
@@ -1086,6 +1408,7 @@
 	return Default_FileOptions_JavaMultipleFiles
 }
 
+// Deprecated: Do not use.
 func (m *FileOptions) GetJavaGenerateEqualsAndHash() bool {
 	if m != nil && m.JavaGenerateEqualsAndHash != nil {
 		return *m.JavaGenerateEqualsAndHash
@@ -1251,22 +1574,43 @@
 	MapEntry *bool `protobuf:"varint,7,opt,name=map_entry,json=mapEntry" json:"map_entry,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *MessageOptions) Reset()                    { *m = MessageOptions{} }
-func (m *MessageOptions) String() string            { return proto.CompactTextString(m) }
-func (*MessageOptions) ProtoMessage()               {}
-func (*MessageOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
+func (m *MessageOptions) Reset()         { *m = MessageOptions{} }
+func (m *MessageOptions) String() string { return proto.CompactTextString(m) }
+func (*MessageOptions) ProtoMessage()    {}
+func (*MessageOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{11}
+}
 
 var extRange_MessageOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*MessageOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_MessageOptions
 }
+func (m *MessageOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MessageOptions.Unmarshal(m, b)
+}
+func (m *MessageOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MessageOptions.Marshal(b, m, deterministic)
+}
+func (dst *MessageOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MessageOptions.Merge(dst, src)
+}
+func (m *MessageOptions) XXX_Size() int {
+	return xxx_messageInfo_MessageOptions.Size(m)
+}
+func (m *MessageOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_MessageOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MessageOptions proto.InternalMessageInfo
 
 const Default_MessageOptions_MessageSetWireFormat bool = false
 const Default_MessageOptions_NoStandardDescriptorAccessor bool = false
@@ -1369,22 +1713,43 @@
 	Weak *bool `protobuf:"varint,10,opt,name=weak,def=0" json:"weak,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *FieldOptions) Reset()                    { *m = FieldOptions{} }
-func (m *FieldOptions) String() string            { return proto.CompactTextString(m) }
-func (*FieldOptions) ProtoMessage()               {}
-func (*FieldOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{12} }
+func (m *FieldOptions) Reset()         { *m = FieldOptions{} }
+func (m *FieldOptions) String() string { return proto.CompactTextString(m) }
+func (*FieldOptions) ProtoMessage()    {}
+func (*FieldOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{12}
+}
 
 var extRange_FieldOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*FieldOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_FieldOptions
 }
+func (m *FieldOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FieldOptions.Unmarshal(m, b)
+}
+func (m *FieldOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FieldOptions.Marshal(b, m, deterministic)
+}
+func (dst *FieldOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FieldOptions.Merge(dst, src)
+}
+func (m *FieldOptions) XXX_Size() int {
+	return xxx_messageInfo_FieldOptions.Size(m)
+}
+func (m *FieldOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_FieldOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FieldOptions proto.InternalMessageInfo
 
 const Default_FieldOptions_Ctype FieldOptions_CType = FieldOptions_STRING
 const Default_FieldOptions_Jstype FieldOptions_JSType = FieldOptions_JS_NORMAL
@@ -1444,22 +1809,43 @@
 type OneofOptions struct {
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *OneofOptions) Reset()                    { *m = OneofOptions{} }
-func (m *OneofOptions) String() string            { return proto.CompactTextString(m) }
-func (*OneofOptions) ProtoMessage()               {}
-func (*OneofOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{13} }
+func (m *OneofOptions) Reset()         { *m = OneofOptions{} }
+func (m *OneofOptions) String() string { return proto.CompactTextString(m) }
+func (*OneofOptions) ProtoMessage()    {}
+func (*OneofOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{13}
+}
 
 var extRange_OneofOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*OneofOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_OneofOptions
 }
+func (m *OneofOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OneofOptions.Unmarshal(m, b)
+}
+func (m *OneofOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OneofOptions.Marshal(b, m, deterministic)
+}
+func (dst *OneofOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OneofOptions.Merge(dst, src)
+}
+func (m *OneofOptions) XXX_Size() int {
+	return xxx_messageInfo_OneofOptions.Size(m)
+}
+func (m *OneofOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_OneofOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OneofOptions proto.InternalMessageInfo
 
 func (m *OneofOptions) GetUninterpretedOption() []*UninterpretedOption {
 	if m != nil {
@@ -1479,22 +1865,43 @@
 	Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *EnumOptions) Reset()                    { *m = EnumOptions{} }
-func (m *EnumOptions) String() string            { return proto.CompactTextString(m) }
-func (*EnumOptions) ProtoMessage()               {}
-func (*EnumOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{14} }
+func (m *EnumOptions) Reset()         { *m = EnumOptions{} }
+func (m *EnumOptions) String() string { return proto.CompactTextString(m) }
+func (*EnumOptions) ProtoMessage()    {}
+func (*EnumOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{14}
+}
 
 var extRange_EnumOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*EnumOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_EnumOptions
 }
+func (m *EnumOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_EnumOptions.Unmarshal(m, b)
+}
+func (m *EnumOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_EnumOptions.Marshal(b, m, deterministic)
+}
+func (dst *EnumOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EnumOptions.Merge(dst, src)
+}
+func (m *EnumOptions) XXX_Size() int {
+	return xxx_messageInfo_EnumOptions.Size(m)
+}
+func (m *EnumOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_EnumOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EnumOptions proto.InternalMessageInfo
 
 const Default_EnumOptions_Deprecated bool = false
 
@@ -1527,22 +1934,43 @@
 	Deprecated *bool `protobuf:"varint,1,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *EnumValueOptions) Reset()                    { *m = EnumValueOptions{} }
-func (m *EnumValueOptions) String() string            { return proto.CompactTextString(m) }
-func (*EnumValueOptions) ProtoMessage()               {}
-func (*EnumValueOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{15} }
+func (m *EnumValueOptions) Reset()         { *m = EnumValueOptions{} }
+func (m *EnumValueOptions) String() string { return proto.CompactTextString(m) }
+func (*EnumValueOptions) ProtoMessage()    {}
+func (*EnumValueOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{15}
+}
 
 var extRange_EnumValueOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*EnumValueOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_EnumValueOptions
 }
+func (m *EnumValueOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_EnumValueOptions.Unmarshal(m, b)
+}
+func (m *EnumValueOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_EnumValueOptions.Marshal(b, m, deterministic)
+}
+func (dst *EnumValueOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EnumValueOptions.Merge(dst, src)
+}
+func (m *EnumValueOptions) XXX_Size() int {
+	return xxx_messageInfo_EnumValueOptions.Size(m)
+}
+func (m *EnumValueOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_EnumValueOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EnumValueOptions proto.InternalMessageInfo
 
 const Default_EnumValueOptions_Deprecated bool = false
 
@@ -1568,22 +1996,43 @@
 	Deprecated *bool `protobuf:"varint,33,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *ServiceOptions) Reset()                    { *m = ServiceOptions{} }
-func (m *ServiceOptions) String() string            { return proto.CompactTextString(m) }
-func (*ServiceOptions) ProtoMessage()               {}
-func (*ServiceOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{16} }
+func (m *ServiceOptions) Reset()         { *m = ServiceOptions{} }
+func (m *ServiceOptions) String() string { return proto.CompactTextString(m) }
+func (*ServiceOptions) ProtoMessage()    {}
+func (*ServiceOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{16}
+}
 
 var extRange_ServiceOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*ServiceOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_ServiceOptions
 }
+func (m *ServiceOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServiceOptions.Unmarshal(m, b)
+}
+func (m *ServiceOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServiceOptions.Marshal(b, m, deterministic)
+}
+func (dst *ServiceOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServiceOptions.Merge(dst, src)
+}
+func (m *ServiceOptions) XXX_Size() int {
+	return xxx_messageInfo_ServiceOptions.Size(m)
+}
+func (m *ServiceOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServiceOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServiceOptions proto.InternalMessageInfo
 
 const Default_ServiceOptions_Deprecated bool = false
 
@@ -1610,22 +2059,43 @@
 	IdempotencyLevel *MethodOptions_IdempotencyLevel `protobuf:"varint,34,opt,name=idempotency_level,json=idempotencyLevel,enum=google.protobuf.MethodOptions_IdempotencyLevel,def=0" json:"idempotency_level,omitempty"`
 	// The parser stores options it doesn't recognize here. See above.
 	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}               `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
-func (m *MethodOptions) Reset()                    { *m = MethodOptions{} }
-func (m *MethodOptions) String() string            { return proto.CompactTextString(m) }
-func (*MethodOptions) ProtoMessage()               {}
-func (*MethodOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{17} }
+func (m *MethodOptions) Reset()         { *m = MethodOptions{} }
+func (m *MethodOptions) String() string { return proto.CompactTextString(m) }
+func (*MethodOptions) ProtoMessage()    {}
+func (*MethodOptions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{17}
+}
 
 var extRange_MethodOptions = []proto.ExtensionRange{
-	{1000, 536870911},
+	{Start: 1000, End: 536870911},
 }
 
 func (*MethodOptions) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_MethodOptions
 }
+func (m *MethodOptions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MethodOptions.Unmarshal(m, b)
+}
+func (m *MethodOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MethodOptions.Marshal(b, m, deterministic)
+}
+func (dst *MethodOptions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MethodOptions.Merge(dst, src)
+}
+func (m *MethodOptions) XXX_Size() int {
+	return xxx_messageInfo_MethodOptions.Size(m)
+}
+func (m *MethodOptions) XXX_DiscardUnknown() {
+	xxx_messageInfo_MethodOptions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MethodOptions proto.InternalMessageInfo
 
 const Default_MethodOptions_Deprecated bool = false
 const Default_MethodOptions_IdempotencyLevel MethodOptions_IdempotencyLevel = MethodOptions_IDEMPOTENCY_UNKNOWN
@@ -1661,19 +2131,40 @@
 	Name []*UninterpretedOption_NamePart `protobuf:"bytes,2,rep,name=name" json:"name,omitempty"`
 	// The value of the uninterpreted option, in whatever type the tokenizer
 	// identified it as during parsing. Exactly one of these should be set.
-	IdentifierValue  *string  `protobuf:"bytes,3,opt,name=identifier_value,json=identifierValue" json:"identifier_value,omitempty"`
-	PositiveIntValue *uint64  `protobuf:"varint,4,opt,name=positive_int_value,json=positiveIntValue" json:"positive_int_value,omitempty"`
-	NegativeIntValue *int64   `protobuf:"varint,5,opt,name=negative_int_value,json=negativeIntValue" json:"negative_int_value,omitempty"`
-	DoubleValue      *float64 `protobuf:"fixed64,6,opt,name=double_value,json=doubleValue" json:"double_value,omitempty"`
-	StringValue      []byte   `protobuf:"bytes,7,opt,name=string_value,json=stringValue" json:"string_value,omitempty"`
-	AggregateValue   *string  `protobuf:"bytes,8,opt,name=aggregate_value,json=aggregateValue" json:"aggregate_value,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
+	IdentifierValue      *string  `protobuf:"bytes,3,opt,name=identifier_value,json=identifierValue" json:"identifier_value,omitempty"`
+	PositiveIntValue     *uint64  `protobuf:"varint,4,opt,name=positive_int_value,json=positiveIntValue" json:"positive_int_value,omitempty"`
+	NegativeIntValue     *int64   `protobuf:"varint,5,opt,name=negative_int_value,json=negativeIntValue" json:"negative_int_value,omitempty"`
+	DoubleValue          *float64 `protobuf:"fixed64,6,opt,name=double_value,json=doubleValue" json:"double_value,omitempty"`
+	StringValue          []byte   `protobuf:"bytes,7,opt,name=string_value,json=stringValue" json:"string_value,omitempty"`
+	AggregateValue       *string  `protobuf:"bytes,8,opt,name=aggregate_value,json=aggregateValue" json:"aggregate_value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *UninterpretedOption) Reset()                    { *m = UninterpretedOption{} }
-func (m *UninterpretedOption) String() string            { return proto.CompactTextString(m) }
-func (*UninterpretedOption) ProtoMessage()               {}
-func (*UninterpretedOption) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} }
+func (m *UninterpretedOption) Reset()         { *m = UninterpretedOption{} }
+func (m *UninterpretedOption) String() string { return proto.CompactTextString(m) }
+func (*UninterpretedOption) ProtoMessage()    {}
+func (*UninterpretedOption) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{18}
+}
+func (m *UninterpretedOption) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_UninterpretedOption.Unmarshal(m, b)
+}
+func (m *UninterpretedOption) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_UninterpretedOption.Marshal(b, m, deterministic)
+}
+func (dst *UninterpretedOption) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_UninterpretedOption.Merge(dst, src)
+}
+func (m *UninterpretedOption) XXX_Size() int {
+	return xxx_messageInfo_UninterpretedOption.Size(m)
+}
+func (m *UninterpretedOption) XXX_DiscardUnknown() {
+	xxx_messageInfo_UninterpretedOption.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_UninterpretedOption proto.InternalMessageInfo
 
 func (m *UninterpretedOption) GetName() []*UninterpretedOption_NamePart {
 	if m != nil {
@@ -1730,17 +2221,36 @@
 // E.g.,{ ["foo", false], ["bar.baz", true], ["qux", false] } represents
 // "foo.(bar.baz).qux".
 type UninterpretedOption_NamePart struct {
-	NamePart         *string `protobuf:"bytes,1,req,name=name_part,json=namePart" json:"name_part,omitempty"`
-	IsExtension      *bool   `protobuf:"varint,2,req,name=is_extension,json=isExtension" json:"is_extension,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+	NamePart             *string  `protobuf:"bytes,1,req,name=name_part,json=namePart" json:"name_part,omitempty"`
+	IsExtension          *bool    `protobuf:"varint,2,req,name=is_extension,json=isExtension" json:"is_extension,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *UninterpretedOption_NamePart) Reset()         { *m = UninterpretedOption_NamePart{} }
 func (m *UninterpretedOption_NamePart) String() string { return proto.CompactTextString(m) }
 func (*UninterpretedOption_NamePart) ProtoMessage()    {}
 func (*UninterpretedOption_NamePart) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{18, 0}
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{18, 0}
 }
+func (m *UninterpretedOption_NamePart) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_UninterpretedOption_NamePart.Unmarshal(m, b)
+}
+func (m *UninterpretedOption_NamePart) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_UninterpretedOption_NamePart.Marshal(b, m, deterministic)
+}
+func (dst *UninterpretedOption_NamePart) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_UninterpretedOption_NamePart.Merge(dst, src)
+}
+func (m *UninterpretedOption_NamePart) XXX_Size() int {
+	return xxx_messageInfo_UninterpretedOption_NamePart.Size(m)
+}
+func (m *UninterpretedOption_NamePart) XXX_DiscardUnknown() {
+	xxx_messageInfo_UninterpretedOption_NamePart.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_UninterpretedOption_NamePart proto.InternalMessageInfo
 
 func (m *UninterpretedOption_NamePart) GetNamePart() string {
 	if m != nil && m.NamePart != nil {
@@ -1802,14 +2312,35 @@
 	// - Code which tries to interpret locations should probably be designed to
 	//   ignore those that it doesn't understand, as more types of locations could
 	//   be recorded in the future.
-	Location         []*SourceCodeInfo_Location `protobuf:"bytes,1,rep,name=location" json:"location,omitempty"`
-	XXX_unrecognized []byte                     `json:"-"`
+	Location             []*SourceCodeInfo_Location `protobuf:"bytes,1,rep,name=location" json:"location,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                   `json:"-"`
+	XXX_unrecognized     []byte                     `json:"-"`
+	XXX_sizecache        int32                      `json:"-"`
 }
 
-func (m *SourceCodeInfo) Reset()                    { *m = SourceCodeInfo{} }
-func (m *SourceCodeInfo) String() string            { return proto.CompactTextString(m) }
-func (*SourceCodeInfo) ProtoMessage()               {}
-func (*SourceCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19} }
+func (m *SourceCodeInfo) Reset()         { *m = SourceCodeInfo{} }
+func (m *SourceCodeInfo) String() string { return proto.CompactTextString(m) }
+func (*SourceCodeInfo) ProtoMessage()    {}
+func (*SourceCodeInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{19}
+}
+func (m *SourceCodeInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SourceCodeInfo.Unmarshal(m, b)
+}
+func (m *SourceCodeInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SourceCodeInfo.Marshal(b, m, deterministic)
+}
+func (dst *SourceCodeInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SourceCodeInfo.Merge(dst, src)
+}
+func (m *SourceCodeInfo) XXX_Size() int {
+	return xxx_messageInfo_SourceCodeInfo.Size(m)
+}
+func (m *SourceCodeInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_SourceCodeInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SourceCodeInfo proto.InternalMessageInfo
 
 func (m *SourceCodeInfo) GetLocation() []*SourceCodeInfo_Location {
 	if m != nil {
@@ -1899,13 +2430,34 @@
 	LeadingComments         *string  `protobuf:"bytes,3,opt,name=leading_comments,json=leadingComments" json:"leading_comments,omitempty"`
 	TrailingComments        *string  `protobuf:"bytes,4,opt,name=trailing_comments,json=trailingComments" json:"trailing_comments,omitempty"`
 	LeadingDetachedComments []string `protobuf:"bytes,6,rep,name=leading_detached_comments,json=leadingDetachedComments" json:"leading_detached_comments,omitempty"`
+	XXX_NoUnkeyedLiteral    struct{} `json:"-"`
 	XXX_unrecognized        []byte   `json:"-"`
+	XXX_sizecache           int32    `json:"-"`
 }
 
-func (m *SourceCodeInfo_Location) Reset()                    { *m = SourceCodeInfo_Location{} }
-func (m *SourceCodeInfo_Location) String() string            { return proto.CompactTextString(m) }
-func (*SourceCodeInfo_Location) ProtoMessage()               {}
-func (*SourceCodeInfo_Location) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19, 0} }
+func (m *SourceCodeInfo_Location) Reset()         { *m = SourceCodeInfo_Location{} }
+func (m *SourceCodeInfo_Location) String() string { return proto.CompactTextString(m) }
+func (*SourceCodeInfo_Location) ProtoMessage()    {}
+func (*SourceCodeInfo_Location) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{19, 0}
+}
+func (m *SourceCodeInfo_Location) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SourceCodeInfo_Location.Unmarshal(m, b)
+}
+func (m *SourceCodeInfo_Location) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SourceCodeInfo_Location.Marshal(b, m, deterministic)
+}
+func (dst *SourceCodeInfo_Location) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SourceCodeInfo_Location.Merge(dst, src)
+}
+func (m *SourceCodeInfo_Location) XXX_Size() int {
+	return xxx_messageInfo_SourceCodeInfo_Location.Size(m)
+}
+func (m *SourceCodeInfo_Location) XXX_DiscardUnknown() {
+	xxx_messageInfo_SourceCodeInfo_Location.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SourceCodeInfo_Location proto.InternalMessageInfo
 
 func (m *SourceCodeInfo_Location) GetPath() []int32 {
 	if m != nil {
@@ -1948,14 +2500,35 @@
 type GeneratedCodeInfo struct {
 	// An Annotation connects some span of text in generated code to an element
 	// of its generating .proto file.
-	Annotation       []*GeneratedCodeInfo_Annotation `protobuf:"bytes,1,rep,name=annotation" json:"annotation,omitempty"`
-	XXX_unrecognized []byte                          `json:"-"`
+	Annotation           []*GeneratedCodeInfo_Annotation `protobuf:"bytes,1,rep,name=annotation" json:"annotation,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                        `json:"-"`
+	XXX_unrecognized     []byte                          `json:"-"`
+	XXX_sizecache        int32                           `json:"-"`
 }
 
-func (m *GeneratedCodeInfo) Reset()                    { *m = GeneratedCodeInfo{} }
-func (m *GeneratedCodeInfo) String() string            { return proto.CompactTextString(m) }
-func (*GeneratedCodeInfo) ProtoMessage()               {}
-func (*GeneratedCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{20} }
+func (m *GeneratedCodeInfo) Reset()         { *m = GeneratedCodeInfo{} }
+func (m *GeneratedCodeInfo) String() string { return proto.CompactTextString(m) }
+func (*GeneratedCodeInfo) ProtoMessage()    {}
+func (*GeneratedCodeInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{20}
+}
+func (m *GeneratedCodeInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GeneratedCodeInfo.Unmarshal(m, b)
+}
+func (m *GeneratedCodeInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GeneratedCodeInfo.Marshal(b, m, deterministic)
+}
+func (dst *GeneratedCodeInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GeneratedCodeInfo.Merge(dst, src)
+}
+func (m *GeneratedCodeInfo) XXX_Size() int {
+	return xxx_messageInfo_GeneratedCodeInfo.Size(m)
+}
+func (m *GeneratedCodeInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_GeneratedCodeInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GeneratedCodeInfo proto.InternalMessageInfo
 
 func (m *GeneratedCodeInfo) GetAnnotation() []*GeneratedCodeInfo_Annotation {
 	if m != nil {
@@ -1976,16 +2549,35 @@
 	// Identifies the ending offset in bytes in the generated code that
 	// relates to the identified offset. The end offset should be one past
 	// the last relevant byte (so the length of the text = end - begin).
-	End              *int32 `protobuf:"varint,4,opt,name=end" json:"end,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
+	End                  *int32   `protobuf:"varint,4,opt,name=end" json:"end,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *GeneratedCodeInfo_Annotation) Reset()         { *m = GeneratedCodeInfo_Annotation{} }
 func (m *GeneratedCodeInfo_Annotation) String() string { return proto.CompactTextString(m) }
 func (*GeneratedCodeInfo_Annotation) ProtoMessage()    {}
 func (*GeneratedCodeInfo_Annotation) Descriptor() ([]byte, []int) {
-	return fileDescriptor0, []int{20, 0}
+	return fileDescriptor_descriptor_4df4cb5f42392df6, []int{20, 0}
 }
+func (m *GeneratedCodeInfo_Annotation) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GeneratedCodeInfo_Annotation.Unmarshal(m, b)
+}
+func (m *GeneratedCodeInfo_Annotation) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GeneratedCodeInfo_Annotation.Marshal(b, m, deterministic)
+}
+func (dst *GeneratedCodeInfo_Annotation) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GeneratedCodeInfo_Annotation.Merge(dst, src)
+}
+func (m *GeneratedCodeInfo_Annotation) XXX_Size() int {
+	return xxx_messageInfo_GeneratedCodeInfo_Annotation.Size(m)
+}
+func (m *GeneratedCodeInfo_Annotation) XXX_DiscardUnknown() {
+	xxx_messageInfo_GeneratedCodeInfo_Annotation.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GeneratedCodeInfo_Annotation proto.InternalMessageInfo
 
 func (m *GeneratedCodeInfo_Annotation) GetPath() []int32 {
 	if m != nil {
@@ -2025,6 +2617,7 @@
 	proto.RegisterType((*FieldDescriptorProto)(nil), "google.protobuf.FieldDescriptorProto")
 	proto.RegisterType((*OneofDescriptorProto)(nil), "google.protobuf.OneofDescriptorProto")
 	proto.RegisterType((*EnumDescriptorProto)(nil), "google.protobuf.EnumDescriptorProto")
+	proto.RegisterType((*EnumDescriptorProto_EnumReservedRange)(nil), "google.protobuf.EnumDescriptorProto.EnumReservedRange")
 	proto.RegisterType((*EnumValueDescriptorProto)(nil), "google.protobuf.EnumValueDescriptorProto")
 	proto.RegisterType((*ServiceDescriptorProto)(nil), "google.protobuf.ServiceDescriptorProto")
 	proto.RegisterType((*MethodDescriptorProto)(nil), "google.protobuf.MethodDescriptorProto")
@@ -2050,166 +2643,170 @@
 	proto.RegisterEnum("google.protobuf.MethodOptions_IdempotencyLevel", MethodOptions_IdempotencyLevel_name, MethodOptions_IdempotencyLevel_value)
 }
 
-func init() { proto.RegisterFile("google/protobuf/descriptor.proto", fileDescriptor0) }
+func init() {
+	proto.RegisterFile("google/protobuf/descriptor.proto", fileDescriptor_descriptor_4df4cb5f42392df6)
+}
 
-var fileDescriptor0 = []byte{
-	// 2519 bytes of a gzipped FileDescriptorProto
+var fileDescriptor_descriptor_4df4cb5f42392df6 = []byte{
+	// 2555 bytes of a gzipped FileDescriptorProto
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+	0xa8, 0x3d, 0x50, 0x34, 0xf5, 0xa4, 0x33, 0x68, 0x1f, 0x2b, 0x28, 0x9b, 0xa8, 0xab, 0x0f, 0x73,
+	0xc5, 0xb7, 0xd1, 0xf5, 0xda, 0x37, 0x19, 0xa8, 0xa6, 0x2f, 0x4a, 0xf8, 0xff, 0xe1, 0x72, 0xf4,
+	0xaa, 0xe1, 0xd3, 0x40, 0x7b, 0x62, 0x7a, 0x7c, 0xe3, 0x4c, 0x88, 0x38, 0xc4, 0xe2, 0xa5, 0xdb,
+	0x0c, 0x59, 0x7d, 0x1a, 0x7c, 0x62, 0x7a, 0x6c, 0x5b, 0x4c, 0x48, 0x80, 0x8f, 0xe0, 0xaa, 0xed,
+	0x68, 0x7e, 0x40, 0x6c, 0x83, 0x78, 0x86, 0x36, 0x7b, 0x4f, 0xd2, 0x88, 0xae, 0x53, 0xdf, 0x77,
+	0xc4, 0x81, 0x15, 0x6b, 0x79, 0xd5, 0x76, 0xfa, 0x21, 0x79, 0x96, 0xc9, 0x1b, 0x21, 0x75, 0x2e,
+	0xcc, 0xb2, 0xe7, 0x85, 0xd9, 0x2b, 0x50, 0x9a, 0x10, 0x57, 0xa3, 0x76, 0xe0, 0x9d, 0xf1, 0xf2,
+	0xb8, 0xa8, 0x16, 0x27, 0xc4, 0x55, 0x58, 0xfb, 0x85, 0xdc, 0x52, 0x0e, 0x73, 0xc5, 0x22, 0x2a,
+	0x1d, 0xe6, 0x8a, 0x25, 0x04, 0xb5, 0x7f, 0x64, 0xa1, 0x92, 0x2c, 0x97, 0xd9, 0xed, 0x43, 0xe7,
+	0x27, 0x8b, 0xc4, 0x73, 0xcf, 0x1b, 0xdf, 0x5a, 0x5c, 0xd7, 0x9b, 0xec, 0xc8, 0xd9, 0x2b, 0x88,
+	0x22, 0x56, 0x15, 0x92, 0xec, 0xb8, 0x67, 0xd9, 0x86, 0x8a, 0xa2, 0xa1, 0xa8, 0x86, 0x2d, 0x7c,
+	0x00, 0x85, 0x87, 0x3e, 0xd7, 0x5d, 0xe0, 0xba, 0xdf, 0xfc, 0x76, 0xdd, 0x87, 0x7d, 0xae, 0xbc,
+	0x74, 0xd8, 0xd7, 0x3a, 0x5d, 0xf5, 0xb8, 0x71, 0xa4, 0x86, 0xe2, 0xf8, 0x0a, 0xe4, 0x2c, 0xf2,
+	0xe5, 0x59, 0xfa, 0x70, 0xe2, 0xd0, 0x45, 0x17, 0xe1, 0x0a, 0xe4, 0x9e, 0x50, 0xf2, 0x28, 0x7d,
+	0x24, 0x70, 0xe8, 0x07, 0xdc, 0x0c, 0xbb, 0x90, 0xe7, 0xfe, 0xc2, 0x00, 0xa1, 0xc7, 0xd0, 0x4b,
+	0xb8, 0x08, 0xb9, 0x66, 0x57, 0x65, 0x1b, 0x02, 0x41, 0x45, 0xa0, 0x5a, 0xaf, 0xad, 0x34, 0x15,
+	0x94, 0xa9, 0xdd, 0x81, 0x82, 0x70, 0x02, 0xdb, 0x2c, 0xb1, 0x1b, 0xd0, 0x4b, 0x61, 0x33, 0xd4,
+	0x21, 0x45, 0xbd, 0x27, 0xc7, 0xfb, 0x8a, 0x8a, 0x32, 0xe9, 0xa5, 0xce, 0xa1, 0x7c, 0xcd, 0x87,
+	0x4a, 0xb2, 0x5e, 0x7e, 0x31, 0x77, 0xe1, 0xbf, 0x4a, 0x50, 0x4e, 0xd4, 0xbf, 0xac, 0x70, 0x21,
+	0x96, 0xe5, 0x3c, 0xd1, 0x88, 0x65, 0x12, 0x3f, 0x0c, 0x0d, 0xe0, 0x50, 0x83, 0x21, 0x17, 0x5d,
+	0xba, 0x17, 0xb4, 0x45, 0xf2, 0xa8, 0x50, 0xfb, 0xa3, 0x04, 0x68, 0xbe, 0x00, 0x9d, 0x33, 0x53,
+	0xfa, 0x31, 0xcd, 0xac, 0xfd, 0x41, 0x82, 0x6a, 0xba, 0xea, 0x9c, 0x33, 0xef, 0xda, 0x8f, 0x6a,
+	0xde, 0xdf, 0x33, 0xb0, 0x9a, 0xaa, 0x35, 0x2f, 0x6a, 0xdd, 0x17, 0xb0, 0x6e, 0x1a, 0x74, 0xe2,
+	0x3a, 0x01, 0xb5, 0xf5, 0x33, 0xcd, 0xa2, 0x8f, 0xa9, 0x25, 0xd7, 0x78, 0xd2, 0xd8, 0xfd, 0xf6,
+	0x6a, 0xb6, 0xde, 0x9e, 0xc9, 0x1d, 0x31, 0xb1, 0xbd, 0x8d, 0x76, 0x4b, 0x39, 0xee, 0x75, 0x07,
+	0x4a, 0xa7, 0xf9, 0x99, 0x76, 0xd2, 0xf9, 0x59, 0xa7, 0xfb, 0x49, 0x47, 0x45, 0xe6, 0x1c, 0xed,
+	0x07, 0xdc, 0xf6, 0x3d, 0x40, 0xf3, 0x46, 0xe1, 0xcb, 0xb0, 0xcc, 0x2c, 0xf4, 0x12, 0xde, 0x80,
+	0xb5, 0x4e, 0x57, 0xeb, 0xb7, 0x5b, 0x8a, 0xa6, 0x3c, 0x78, 0xa0, 0x34, 0x07, 0x7d, 0xf1, 0x3e,
+	0x11, 0xb3, 0x07, 0xa9, 0x0d, 0x5e, 0xfb, 0x7d, 0x16, 0x36, 0x96, 0x58, 0x82, 0x1b, 0xe1, 0xcd,
+	0x42, 0x5c, 0x76, 0xde, 0xbd, 0x88, 0xf5, 0x75, 0x56, 0x10, 0xf4, 0x88, 0x17, 0x84, 0x17, 0x91,
+	0x1b, 0xc0, 0xbc, 0x64, 0x07, 0xe6, 0xd0, 0xa4, 0x5e, 0xf8, 0x9c, 0x23, 0xae, 0x1b, 0x6b, 0x33,
+	0x5c, 0xbc, 0xe8, 0xfc, 0x1f, 0x60, 0xd7, 0xf1, 0xcd, 0xc0, 0x7c, 0x4c, 0x35, 0xd3, 0x8e, 0xde,
+	0x7e, 0xd8, 0xf5, 0x23, 0xa7, 0xa2, 0xa8, 0xa7, 0x6d, 0x07, 0x31, 0xdb, 0xa6, 0x23, 0x32, 0xc7,
+	0x66, 0xc9, 0x3c, 0xab, 0xa2, 0xa8, 0x27, 0x66, 0x5f, 0x83, 0x8a, 0xe1, 0x4c, 0x59, 0x4d, 0x26,
+	0x78, 0xec, 0xec, 0x90, 0xd4, 0xb2, 0xc0, 0x62, 0x4a, 0x58, 0x6d, 0xcf, 0x1e, 0x9d, 0x2a, 0x6a,
+	0x59, 0x60, 0x82, 0x72, 0x1d, 0xd6, 0xc8, 0x68, 0xe4, 0x31, 0xe5, 0x91, 0x22, 0x71, 0x7f, 0xa8,
+	0xc6, 0x30, 0x27, 0x6e, 0x1d, 0x42, 0x31, 0xf2, 0x03, 0x3b, 0xaa, 0x99, 0x27, 0x34, 0x57, 0x5c,
+	0x8a, 0x33, 0x3b, 0x25, 0xb5, 0x68, 0x47, 0x9d, 0xd7, 0xa0, 0x62, 0xfa, 0xda, 0xec, 0x0d, 0x3d,
+	0xb3, 0x9d, 0xd9, 0x29, 0xaa, 0x65, 0xd3, 0x8f, 0xdf, 0x1f, 0x6b, 0x5f, 0x65, 0xa0, 0x9a, 0xfe,
+	0x06, 0x80, 0x5b, 0x50, 0xb4, 0x1c, 0x9d, 0xf0, 0xd0, 0x12, 0x1f, 0xa0, 0x76, 0x9e, 0xf3, 0xd9,
+	0xa0, 0x7e, 0x14, 0xf2, 0xd5, 0x58, 0x72, 0xeb, 0x6f, 0x12, 0x14, 0x23, 0x18, 0x5f, 0x82, 0x9c,
+	0x4b, 0x82, 0x31, 0x57, 0x97, 0xdf, 0xcf, 0x20, 0x49, 0xe5, 0x6d, 0x86, 0xfb, 0x2e, 0xb1, 0x79,
+	0x08, 0x84, 0x38, 0x6b, 0xb3, 0x75, 0xb5, 0x28, 0x31, 0xf8, 0xe5, 0xc4, 0x99, 0x4c, 0xa8, 0x1d,
+	0xf8, 0xd1, 0xba, 0x86, 0x78, 0x33, 0x84, 0xf1, 0x3b, 0xb0, 0x1e, 0x78, 0xc4, 0xb4, 0x52, 0xdc,
+	0x1c, 0xe7, 0xa2, 0xa8, 0x23, 0x26, 0xef, 0xc1, 0x95, 0x48, 0xaf, 0x41, 0x03, 0xa2, 0x8f, 0xa9,
+	0x31, 0x13, 0x2a, 0xf0, 0x47, 0x88, 0xcb, 0x21, 0xa1, 0x15, 0xf6, 0x47, 0xb2, 0xb5, 0x6f, 0x24,
+	0x58, 0x8f, 0xae, 0x53, 0x46, 0xec, 0xac, 0x63, 0x00, 0x62, 0xdb, 0x4e, 0x90, 0x74, 0xd7, 0x62,
+	0x28, 0x2f, 0xc8, 0xd5, 0x1b, 0xb1, 0x90, 0x9a, 0x50, 0xb0, 0x35, 0x01, 0x98, 0xf5, 0x9c, 0xeb,
+	0xb6, 0xab, 0x50, 0x0e, 0x3f, 0xf0, 0xf0, 0xaf, 0x84, 0xe2, 0x02, 0x0e, 0x02, 0x62, 0xf7, 0x2e,
+	0xbc, 0x09, 0xf9, 0x53, 0x3a, 0x32, 0xed, 0xf0, 0xd9, 0x56, 0x34, 0xa2, 0x67, 0x92, 0x5c, 0xfc,
+	0x4c, 0xb2, 0xff, 0x5b, 0x09, 0x36, 0x74, 0x67, 0x32, 0x6f, 0xef, 0x3e, 0x9a, 0x7b, 0x05, 0xf0,
+	0x3f, 0x96, 0x3e, 0xff, 0x68, 0x64, 0x06, 0xe3, 0xe9, 0x69, 0x5d, 0x77, 0x26, 0xbb, 0x23, 0xc7,
+	0x22, 0xf6, 0x68, 0xf6, 0x99, 0x93, 0xff, 0xd1, 0xdf, 0x1d, 0x51, 0xfb, 0xdd, 0x91, 0x93, 0xf8,
+	0xe8, 0x79, 0x7f, 0xf6, 0xf7, 0xbf, 0x92, 0xf4, 0xa7, 0x4c, 0xf6, 0xa0, 0xb7, 0xff, 0xe7, 0xcc,
+	0xd6, 0x81, 0x18, 0xae, 0x17, 0xb9, 0x47, 0xa5, 0x43, 0x8b, 0xea, 0x6c, 0xca, 0xff, 0x0b, 0x00,
+	0x00, 0xff, 0xff, 0x1a, 0x28, 0x25, 0x79, 0x42, 0x1d, 0x00, 0x00,
 }
diff --git a/protoc-gen-go/descriptor/descriptor.proto b/protoc-gen-go/descriptor/descriptor.proto
index 4d4fb37..8697a50 100644
--- a/protoc-gen-go/descriptor/descriptor.proto
+++ b/protoc-gen-go/descriptor/descriptor.proto
@@ -45,6 +45,7 @@
 option java_outer_classname = "DescriptorProtos";
 option csharp_namespace = "Google.Protobuf.Reflection";
 option objc_class_prefix = "GPB";
+option cc_enable_arenas = true;
 
 // descriptor.proto must be optimized for speed because reflection-based
 // algorithms don't work during bootstrapping.
@@ -225,6 +226,26 @@
   repeated EnumValueDescriptorProto value = 2;
 
   optional EnumOptions options = 3;
+
+  // Range of reserved numeric values. Reserved values may not be used by
+  // entries in the same enum. Reserved ranges may not overlap.
+  //
+  // Note that this is distinct from DescriptorProto.ReservedRange in that it
+  // is inclusive such that it can appropriately represent the entire int32
+  // domain.
+  message EnumReservedRange {
+    optional int32 start = 1; // Inclusive.
+    optional int32 end = 2;   // Inclusive.
+  }
+
+  // Range of reserved numeric values. Reserved numeric values may not be used
+  // by enum values in the same enum declaration. Reserved ranges may not
+  // overlap.
+  repeated EnumReservedRange reserved_range = 4;
+
+  // Reserved enum value names, which may not be reused. A given name may only
+  // be reserved once.
+  repeated string reserved_name = 5;
 }
 
 // Describes a value within an enum.
@@ -396,10 +417,12 @@
   // determining the namespace.
   optional string php_namespace = 41;
 
-  // The parser stores options it doesn't recognize here. See above.
+  // The parser stores options it doesn't recognize here.
+  // See the documentation for the "Options" section above.
   repeated UninterpretedOption uninterpreted_option = 999;
 
-  // Clients can define custom options in extensions of this message. See above.
+  // Clients can define custom options in extensions of this message.
+  // See the documentation for the "Options" section above.
   extensions 1000 to max;
 
   reserved 38;
diff --git a/protoc-gen-go/generator/Makefile b/protoc-gen-go/generator/Makefile
deleted file mode 100644
index b5715c3..0000000
--- a/protoc-gen-go/generator/Makefile
+++ /dev/null
@@ -1,40 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-include $(GOROOT)/src/Make.inc
-
-TARG=github.com/golang/protobuf/compiler/generator
-GOFILES=\
-	generator.go\
-
-DEPS=../descriptor ../plugin ../../proto
-
-include $(GOROOT)/src/Make.pkg
diff --git a/protoc-gen-go/generator/generator.go b/protoc-gen-go/generator/generator.go
index 569451f..e0aba85 100644
--- a/protoc-gen-go/generator/generator.go
+++ b/protoc-gen-go/generator/generator.go
@@ -40,19 +40,24 @@
 	"bufio"
 	"bytes"
 	"compress/gzip"
+	"crypto/sha256"
+	"encoding/hex"
 	"fmt"
+	"go/build"
 	"go/parser"
 	"go/printer"
 	"go/token"
 	"log"
 	"os"
 	"path"
+	"sort"
 	"strconv"
 	"strings"
 	"unicode"
 	"unicode/utf8"
 
 	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/protoc-gen-go/generator/internal/remap"
 
 	"github.com/golang/protobuf/protoc-gen-go/descriptor"
 	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
@@ -88,6 +93,14 @@
 	plugins = append(plugins, p)
 }
 
+// A GoImportPath is the import path of a Go package. e.g., "google.golang.org/genproto/protobuf".
+type GoImportPath string
+
+func (p GoImportPath) String() string { return strconv.Quote(string(p)) }
+
+// A GoPackageName is the name of a Go package. e.g., "protobuf".
+type GoPackageName string
+
 // Each type we import as a protocol buffer (other than FileDescriptorProto) needs
 // a pointer to the FileDescriptorProto that represents it.  These types achieve that
 // wrapping by placing each Proto inside a struct with the pointer to its File. The
@@ -96,19 +109,21 @@
 
 // The file and package name method are common to messages and enums.
 type common struct {
-	file *descriptor.FileDescriptorProto // File this object comes from.
+	file *FileDescriptor // File this object comes from.
 }
 
-// PackageName is name in the package clause in the generated file.
-func (c *common) PackageName() string { return uniquePackageOf(c.file) }
+// GoImportPath is the import path of the Go package containing the type.
+func (c *common) GoImportPath() GoImportPath {
+	return c.file.importPath
+}
 
-func (c *common) File() *descriptor.FileDescriptorProto { return c.file }
+func (c *common) File() *FileDescriptor { return c.file }
 
 func fileIsProto3(file *descriptor.FileDescriptorProto) bool {
 	return file.GetSyntax() == "proto3"
 }
 
-func (c *common) proto3() bool { return fileIsProto3(c.file) }
+func (c *common) proto3() bool { return fileIsProto3(c.file.FileDescriptorProto) }
 
 // Descriptor represents a protocol buffer message.
 type Descriptor struct {
@@ -134,7 +149,7 @@
 	for parent := d; parent != nil; parent = parent.parent {
 		n++
 	}
-	s := make([]string, n, n)
+	s := make([]string, n)
 	for parent := d; parent != nil; parent = parent.parent {
 		n--
 		s[n] = parent.GetName()
@@ -256,77 +271,61 @@
 	// This is used for supporting public imports.
 	exported map[Object][]symbol
 
-	index int // The index of this file in the list of files to generate code for
+	fingerprint string        // Fingerprint of this file's contents.
+	importPath  GoImportPath  // Import path of this file's package.
+	packageName GoPackageName // Name of this file's Go package.
 
 	proto3 bool // whether to generate proto3 code for this file
 }
 
-// PackageName is the package name we'll use in the generated code to refer to this file.
-func (d *FileDescriptor) PackageName() string { return uniquePackageOf(d.FileDescriptorProto) }
-
 // VarName is the variable name we'll use in the generated code to refer
 // to the compressed bytes of this descriptor. It is not exported, so
 // it is only valid inside the generated package.
-func (d *FileDescriptor) VarName() string { return fmt.Sprintf("fileDescriptor%d", d.index) }
+func (d *FileDescriptor) VarName() string {
+	name := strings.Map(badToUnderscore, baseName(d.GetName()))
+	return fmt.Sprintf("fileDescriptor_%s_%s", name, d.fingerprint)
+}
 
 // goPackageOption interprets the file's go_package option.
 // If there is no go_package, it returns ("", "", false).
 // If there's a simple name, it returns ("", pkg, true).
 // If the option implies an import path, it returns (impPath, pkg, true).
-func (d *FileDescriptor) goPackageOption() (impPath, pkg string, ok bool) {
-	pkg = d.GetOptions().GetGoPackage()
-	if pkg == "" {
-		return
+func (d *FileDescriptor) goPackageOption() (impPath GoImportPath, pkg GoPackageName, ok bool) {
+	opt := d.GetOptions().GetGoPackage()
+	if opt == "" {
+		return "", "", false
 	}
-	ok = true
+	// A semicolon-delimited suffix delimits the import path and package name.
+	sc := strings.Index(opt, ";")
+	if sc >= 0 {
+		return GoImportPath(opt[:sc]), cleanPackageName(opt[sc+1:]), true
+	}
 	// The presence of a slash implies there's an import path.
-	slash := strings.LastIndex(pkg, "/")
-	if slash < 0 {
-		return
+	slash := strings.LastIndex(opt, "/")
+	if slash >= 0 {
+		return GoImportPath(opt), cleanPackageName(opt[slash+1:]), true
 	}
-	impPath, pkg = pkg, pkg[slash+1:]
-	// A semicolon-delimited suffix overrides the package name.
-	sc := strings.IndexByte(impPath, ';')
-	if sc < 0 {
-		return
-	}
-	impPath, pkg = impPath[:sc], impPath[sc+1:]
-	return
-}
-
-// goPackageName returns the Go package name to use in the
-// generated Go file.  The result explicit reports whether the name
-// came from an option go_package statement.  If explicit is false,
-// the name was derived from the protocol buffer's package statement
-// or the input file name.
-func (d *FileDescriptor) goPackageName() (name string, explicit bool) {
-	// Does the file have a "go_package" option?
-	if _, pkg, ok := d.goPackageOption(); ok {
-		return pkg, true
-	}
-
-	// Does the file have a package clause?
-	if pkg := d.GetPackage(); pkg != "" {
-		return pkg, false
-	}
-	// Use the file base name.
-	return baseName(d.GetName()), false
+	return "", cleanPackageName(opt), true
 }
 
 // goFileName returns the output name for the generated Go file.
-func (d *FileDescriptor) goFileName() string {
+func (d *FileDescriptor) goFileName(pathType pathType) string {
 	name := *d.Name
 	if ext := path.Ext(name); ext == ".proto" || ext == ".protodevel" {
 		name = name[:len(name)-len(ext)]
 	}
 	name += ".pb.go"
 
+	if pathType == pathTypeSourceRelative {
+		return name
+	}
+
 	// Does the file have a "go_package" option?
 	// If it does, it may override the filename.
 	if impPath, _, ok := d.goPackageOption(); ok && impPath != "" {
 		// Replace the existing dirname with the declared import path.
 		_, name = path.Split(name)
-		name = path.Join(impPath, name)
+		name = path.Join(string(impPath), name)
 		return name
 	}
 
@@ -341,14 +340,13 @@
 type symbol interface {
 	// GenerateAlias should generate an appropriate alias
 	// for the symbol from the named package.
-	GenerateAlias(g *Generator, pkg string)
+	GenerateAlias(g *Generator, pkg GoPackageName)
 }
 
 type messageSymbol struct {
 	sym                         string
 	hasExtensions, isMessageSet bool
-	hasOneof                    bool
-	getters                     []getterSymbol
+	oneofTypes                  []string
 }
 
 type getterSymbol struct {
@@ -358,144 +356,11 @@
 	genType  bool   // whether typ contains a generated type (message/group/enum)
 }
 
-func (ms *messageSymbol) GenerateAlias(g *Generator, pkg string) {
-	remoteSym := pkg + "." + ms.sym
-
-	g.P("type ", ms.sym, " ", remoteSym)
-	g.P("func (m *", ms.sym, ") Reset() { (*", remoteSym, ")(m).Reset() }")
-	g.P("func (m *", ms.sym, ") String() string { return (*", remoteSym, ")(m).String() }")
-	g.P("func (*", ms.sym, ") ProtoMessage() {}")
-	if ms.hasExtensions {
-		g.P("func (*", ms.sym, ") ExtensionRangeArray() []", g.Pkg["proto"], ".ExtensionRange ",
-			"{ return (*", remoteSym, ")(nil).ExtensionRangeArray() }")
-		if ms.isMessageSet {
-			g.P("func (m *", ms.sym, ") Marshal() ([]byte, error) ",
-				"{ return (*", remoteSym, ")(m).Marshal() }")
-			g.P("func (m *", ms.sym, ") Unmarshal(buf []byte) error ",
-				"{ return (*", remoteSym, ")(m).Unmarshal(buf) }")
-		}
+func (ms *messageSymbol) GenerateAlias(g *Generator, pkg GoPackageName) {
+	g.P("type ", ms.sym, " = ", pkg, ".", ms.sym)
+	for _, name := range ms.oneofTypes {
+		g.P("type ", name, " = ", pkg, ".", name)
 	}
-	if ms.hasOneof {
-		// Oneofs and public imports do not mix well.
-		// We can make them work okay for the binary format,
-		// but they're going to break weirdly for text/JSON.
-		enc := "_" + ms.sym + "_OneofMarshaler"
-		dec := "_" + ms.sym + "_OneofUnmarshaler"
-		size := "_" + ms.sym + "_OneofSizer"
-		encSig := "(msg " + g.Pkg["proto"] + ".Message, b *" + g.Pkg["proto"] + ".Buffer) error"
-		decSig := "(msg " + g.Pkg["proto"] + ".Message, tag, wire int, b *" + g.Pkg["proto"] + ".Buffer) (bool, error)"
-		sizeSig := "(msg " + g.Pkg["proto"] + ".Message) int"
-		g.P("func (m *", ms.sym, ") XXX_OneofFuncs() (func", encSig, ", func", decSig, ", func", sizeSig, ", []interface{}) {")
-		g.P("return ", enc, ", ", dec, ", ", size, ", nil")
-		g.P("}")
-
-		g.P("func ", enc, encSig, " {")
-		g.P("m := msg.(*", ms.sym, ")")
-		g.P("m0 := (*", remoteSym, ")(m)")
-		g.P("enc, _, _, _ := m0.XXX_OneofFuncs()")
-		g.P("return enc(m0, b)")
-		g.P("}")
-
-		g.P("func ", dec, decSig, " {")
-		g.P("m := msg.(*", ms.sym, ")")
-		g.P("m0 := (*", remoteSym, ")(m)")
-		g.P("_, dec, _, _ := m0.XXX_OneofFuncs()")
-		g.P("return dec(m0, tag, wire, b)")
-		g.P("}")
-
-		g.P("func ", size, sizeSig, " {")
-		g.P("m := msg.(*", ms.sym, ")")
-		g.P("m0 := (*", remoteSym, ")(m)")
-		g.P("_, _, size, _ := m0.XXX_OneofFuncs()")
-		g.P("return size(m0)")
-		g.P("}")
-	}
-	for _, get := range ms.getters {
-
-		if get.typeName != "" {
-			g.RecordTypeUse(get.typeName)
-		}
-		typ := get.typ
-		val := "(*" + remoteSym + ")(m)." + get.name + "()"
-		if get.genType {
-			// typ will be "*pkg.T" (message/group) or "pkg.T" (enum)
-			// or "map[t]*pkg.T" (map to message/enum).
-			// The first two of those might have a "[]" prefix if it is repeated.
-			// Drop any package qualifier since we have hoisted the type into this package.
-			rep := strings.HasPrefix(typ, "[]")
-			if rep {
-				typ = typ[2:]
-			}
-			isMap := strings.HasPrefix(typ, "map[")
-			star := typ[0] == '*'
-			if !isMap { // map types handled lower down
-				typ = typ[strings.Index(typ, ".")+1:]
-			}
-			if star {
-				typ = "*" + typ
-			}
-			if rep {
-				// Go does not permit conversion between slice types where both
-				// element types are named. That means we need to generate a bit
-				// of code in this situation.
-				// typ is the element type.
-				// val is the expression to get the slice from the imported type.
-
-				ctyp := typ // conversion type expression; "Foo" or "(*Foo)"
-				if star {
-					ctyp = "(" + typ + ")"
-				}
-
-				g.P("func (m *", ms.sym, ") ", get.name, "() []", typ, " {")
-				g.In()
-				g.P("o := ", val)
-				g.P("if o == nil {")
-				g.In()
-				g.P("return nil")
-				g.Out()
-				g.P("}")
-				g.P("s := make([]", typ, ", len(o))")
-				g.P("for i, x := range o {")
-				g.In()
-				g.P("s[i] = ", ctyp, "(x)")
-				g.Out()
-				g.P("}")
-				g.P("return s")
-				g.Out()
-				g.P("}")
-				continue
-			}
-			if isMap {
-				// Split map[keyTyp]valTyp.
-				bra, ket := strings.Index(typ, "["), strings.Index(typ, "]")
-				keyTyp, valTyp := typ[bra+1:ket], typ[ket+1:]
-				// Drop any package qualifier.
-				// Only the value type may be foreign.
-				star := valTyp[0] == '*'
-				valTyp = valTyp[strings.Index(valTyp, ".")+1:]
-				if star {
-					valTyp = "*" + valTyp
-				}
-
-				typ := "map[" + keyTyp + "]" + valTyp
-				g.P("func (m *", ms.sym, ") ", get.name, "() ", typ, " {")
-				g.P("o := ", val)
-				g.P("if o == nil { return nil }")
-				g.P("s := make(", typ, ", len(o))")
-				g.P("for k, v := range o {")
-				g.P("s[k] = (", valTyp, ")(v)")
-				g.P("}")
-				g.P("return s")
-				g.P("}")
-				continue
-			}
-			// Convert imported type into the forwarding type.
-			val = "(" + typ + ")(" + val + ")"
-		}
-
-		g.P("func (m *", ms.sym, ") ", get.name, "() ", typ, " { return ", val, " }")
-	}
-
 }
 
 type enumSymbol struct {
@@ -503,16 +368,11 @@
 	proto3 bool // Whether this came from a proto3 file.
 }
 
-func (es enumSymbol) GenerateAlias(g *Generator, pkg string) {
+func (es enumSymbol) GenerateAlias(g *Generator, pkg GoPackageName) {
 	s := es.name
-	g.P("type ", s, " ", pkg, ".", s)
+	g.P("type ", s, " = ", pkg, ".", s)
 	g.P("var ", s, "_name = ", pkg, ".", s, "_name")
 	g.P("var ", s, "_value = ", pkg, ".", s, "_value")
-	g.P("func (x ", s, ") String() string { return (", pkg, ".", s, ")(x).String() }")
-	if !es.proto3 {
-		g.P("func (x ", s, ") Enum() *", s, "{ return (*", s, ")((", pkg, ".", s, ")(x).Enum()) }")
-		g.P("func (x *", s, ") UnmarshalJSON(data []byte) error { return (*", pkg, ".", s, ")(x).UnmarshalJSON(data) }")
-	}
 }
 
 type constOrVarSymbol struct {
@@ -521,8 +381,8 @@
 	cast string // if non-empty, a type cast is required (used for enums)
 }
 
-func (cs constOrVarSymbol) GenerateAlias(g *Generator, pkg string) {
-	v := pkg + "." + cs.sym
+func (cs constOrVarSymbol) GenerateAlias(g *Generator, pkg GoPackageName) {
+	v := string(pkg) + "." + cs.sym
 	if cs.cast != "" {
 		v = cs.cast + "(" + v + ")"
 	}
@@ -531,21 +391,9 @@
 
 // Object is an interface abstracting the abilities shared by enums, messages, extensions and imported objects.
 type Object interface {
-	PackageName() string // The name we use in our output (a_b_c), possibly renamed for uniqueness.
+	GoImportPath() GoImportPath
 	TypeName() []string
-	File() *descriptor.FileDescriptorProto
-}
-
-// Each package name we generate must be unique. The package we're generating
-// gets its own name but every other package must have a unique name that does
-// not conflict in the code we generate.  These names are chosen globally (although
-// they don't have to be, it simplifies things to do them globally).
-func uniquePackageOf(fd *descriptor.FileDescriptorProto) string {
-	s, ok := uniquePackageName[fd]
-	if !ok {
-		log.Fatal("internal error: no package name defined for " + fd.GetName())
-	}
-	return s
+	File() *FileDescriptor
 }
 
 // Generator is the type whose methods generate the output, stored in the associated response structure.
@@ -562,18 +410,30 @@
 
 	Pkg map[string]string // The names under which we import support packages
 
-	packageName      string                     // What we're calling ourselves.
-	allFiles         []*FileDescriptor          // All files in the tree
-	allFilesByName   map[string]*FileDescriptor // All files by filename.
-	genFiles         []*FileDescriptor          // Those files we will generate output for.
-	file             *FileDescriptor            // The file we are compiling now.
-	usedPackages     map[string]bool            // Names of packages used in current file.
-	typeNameToObject map[string]Object          // Key is a fully-qualified name in input syntax.
-	init             []string                   // Lines to emit in the init function.
+	outputImportPath GoImportPath                   // Package we're generating code for.
+	allFiles         []*FileDescriptor              // All files in the tree
+	allFilesByName   map[string]*FileDescriptor     // All files by filename.
+	genFiles         []*FileDescriptor              // Those files we will generate output for.
+	file             *FileDescriptor                // The file we are compiling now.
+	packageNames     map[GoImportPath]GoPackageName // Imported package names in the current file.
+	usedPackages     map[GoImportPath]bool          // Packages used in current file.
+	usedPackageNames map[GoPackageName]bool         // Package names used in the current file.
+	typeNameToObject map[string]Object              // Key is a fully-qualified name in input syntax.
+	init             []string                       // Lines to emit in the init function.
 	indent           string
+	pathType         pathType // How to generate output filenames.
 	writeOutput      bool
+	annotateCode     bool                                       // whether to store annotations
+	annotations      []*descriptor.GeneratedCodeInfo_Annotation // annotations to store
 }
 
+type pathType int
+
+const (
+	pathTypeImport pathType = iota
+	pathTypeSourceRelative
+)
+
 // New creates a new generator and allocates the request and response protobufs.
 func New() *Generator {
 	g := new(Generator)
@@ -618,8 +478,21 @@
 			g.ImportPrefix = v
 		case "import_path":
 			g.PackageImportPath = v
+		case "paths":
+			switch v {
+			case "import":
+				g.pathType = pathTypeImport
+			case "source_relative":
+				g.pathType = pathTypeSourceRelative
+			default:
+				g.Fail(fmt.Sprintf(`Unknown path type %q: want "import" or "source_relative".`, v))
+			}
 		case "plugins":
 			pluginList = v
+		case "annotate_code":
+			if v == "true" {
+				g.annotateCode = true
+			}
 		default:
 			if len(k) > 0 && k[0] == 'M' {
 				g.ImportMap[k[1:]] = v
@@ -646,37 +519,42 @@
 // If its file is in a different package, it returns the package name we're using for this file, plus ".".
 // Otherwise it returns the empty string.
 func (g *Generator) DefaultPackageName(obj Object) string {
-	pkg := obj.PackageName()
-	if pkg == g.packageName {
+	importPath := obj.GoImportPath()
+	if importPath == g.outputImportPath {
 		return ""
 	}
-	return pkg + "."
+	return string(g.GoPackageName(importPath)) + "."
 }
 
-// For each input file, the unique package name to use, underscored.
-var uniquePackageName = make(map[*descriptor.FileDescriptorProto]string)
+// GoPackageName returns the name used for a package.
+func (g *Generator) GoPackageName(importPath GoImportPath) GoPackageName {
+	if name, ok := g.packageNames[importPath]; ok {
+		return name
+	}
+	name := cleanPackageName(baseName(string(importPath)))
+	for i, orig := 1, name; g.usedPackageNames[name]; i++ {
+		name = orig + GoPackageName(strconv.Itoa(i))
+	}
+	g.packageNames[importPath] = name
+	g.usedPackageNames[name] = true
+	return name
+}
 
-// Package names already registered.  Key is the name from the .proto file;
-// value is the name that appears in the generated code.
-var pkgNamesInUse = make(map[string]bool)
+var globalPackageNames = map[GoPackageName]bool{
+	"fmt":   true,
+	"math":  true,
+	"proto": true,
+}
 
-// Create and remember a guaranteed unique package name for this file descriptor.
-// Pkg is the candidate name.  If f is nil, it's a builtin package like "proto" and
-// has no file descriptor.
+// Create and remember a guaranteed unique package name. Pkg is the candidate name.
+// The FileDescriptor parameter is unused.
 func RegisterUniquePackageName(pkg string, f *FileDescriptor) string {
-	// Convert dots to underscores before finding a unique alias.
-	pkg = strings.Map(badToUnderscore, pkg)
-
-	for i, orig := 1, pkg; pkgNamesInUse[pkg]; i++ {
-		// It's a duplicate; must rename.
-		pkg = orig + strconv.Itoa(i)
+	name := cleanPackageName(pkg)
+	for i, orig := 1, name; globalPackageNames[name]; i++ {
+		name = orig + GoPackageName(strconv.Itoa(i))
 	}
-	// Install it.
-	pkgNamesInUse[pkg] = true
-	if f != nil {
-		uniquePackageName[f.FileDescriptorProto] = pkg
-	}
-	return pkg
+	globalPackageNames[name] = true
+	return string(name)
 }
 
 var isGoKeyword = map[string]bool{
@@ -707,97 +585,83 @@
 	"var":         true,
 }
 
+func cleanPackageName(name string) GoPackageName {
+	name = strings.Map(badToUnderscore, name)
+	// Identifier must not be keyword: insert _.
+	if isGoKeyword[name] {
+		name = "_" + name
+	}
+	// Identifier must not begin with digit: insert _.
+	if r, _ := utf8.DecodeRuneInString(name); unicode.IsDigit(r) {
+		name = "_" + name
+	}
+	return GoPackageName(name)
+}
+
 // defaultGoPackage returns the package name to use,
 // derived from the import path of the package we're building code for.
-func (g *Generator) defaultGoPackage() string {
+func (g *Generator) defaultGoPackage() GoPackageName {
 	p := g.PackageImportPath
 	if i := strings.LastIndex(p, "/"); i >= 0 {
 		p = p[i+1:]
 	}
-	if p == "" {
-		return ""
-	}
-
-	p = strings.Map(badToUnderscore, p)
-	// Identifier must not be keyword: insert _.
-	if isGoKeyword[p] {
-		p = "_" + p
-	}
-	// Identifier must not begin with digit: insert _.
-	if r, _ := utf8.DecodeRuneInString(p); unicode.IsDigit(r) {
-		p = "_" + p
-	}
-	return p
+	return cleanPackageName(p)
 }
 
 // SetPackageNames sets the package name for this run.
 // The package name must agree across all files being generated.
 // It also defines unique package names for all imported files.
 func (g *Generator) SetPackageNames() {
-	// Register the name for this package.  It will be the first name
-	// registered so is guaranteed to be unmodified.
-	pkg, explicit := g.genFiles[0].goPackageName()
+	g.outputImportPath = g.genFiles[0].importPath
 
-	// Check all files for an explicit go_package option.
+	defaultPackageNames := make(map[GoImportPath]GoPackageName)
 	for _, f := range g.genFiles {
-		thisPkg, thisExplicit := f.goPackageName()
-		if thisExplicit {
-			if !explicit {
-				// Let this file's go_package option serve for all input files.
-				pkg, explicit = thisPkg, true
-			} else if thisPkg != pkg {
-				g.Fail("inconsistent package names:", thisPkg, pkg)
-			}
+		if _, p, ok := f.goPackageOption(); ok {
+			defaultPackageNames[f.importPath] = p
+		}
+	}
+	for _, f := range g.genFiles {
+		if _, p, ok := f.goPackageOption(); ok {
+			// Source file: option go_package = "quux/bar";
+			f.packageName = p
+		} else if p, ok := defaultPackageNames[f.importPath]; ok {
+			// A go_package option in another file in the same package.
+			//
+			// This is a poor choice in general, since every source file should
+			// contain a go_package option. Supported mainly for historical
+			// compatibility.
+			f.packageName = p
+		} else if p := g.defaultGoPackage(); p != "" {
+			// Command-line: import_path=quux/bar.
+			//
+			// The import_path flag sets a package name for files which don't
+			// contain a go_package option.
+			f.packageName = p
+		} else if p := f.GetPackage(); p != "" {
+			// Source file: package quux.bar;
+			f.packageName = cleanPackageName(p)
+		} else {
+			// Source filename.
+			f.packageName = cleanPackageName(baseName(f.GetName()))
 		}
 	}
 
-	// If we don't have an explicit go_package option but we have an
-	// import path, use that.
-	if !explicit {
-		p := g.defaultGoPackage()
-		if p != "" {
-			pkg, explicit = p, true
+	// Check that all files have a consistent package name and import path.
+	for _, f := range g.genFiles[1:] {
+		if a, b := g.genFiles[0].importPath, f.importPath; a != b {
+			g.Fail(fmt.Sprintf("inconsistent package import paths: %v, %v", a, b))
+		}
+		if a, b := g.genFiles[0].packageName, f.packageName; a != b {
+			g.Fail(fmt.Sprintf("inconsistent package names: %v, %v", a, b))
 		}
 	}
 
-	// If there was no go_package and no import path to use,
-	// double-check that all the inputs have the same implicit
-	// Go package name.
-	if !explicit {
-		for _, f := range g.genFiles {
-			thisPkg, _ := f.goPackageName()
-			if thisPkg != pkg {
-				g.Fail("inconsistent package names:", thisPkg, pkg)
-			}
-		}
-	}
-
-	g.packageName = RegisterUniquePackageName(pkg, g.genFiles[0])
-
-	// Register the support package names. They might collide with the
-	// name of a package we import.
+	// Names of support packages. These never vary (if there are conflicts,
+	// we rename the conflicting package), so this could be removed someday.
 	g.Pkg = map[string]string{
-		"fmt":   RegisterUniquePackageName("fmt", nil),
-		"math":  RegisterUniquePackageName("math", nil),
-		"proto": RegisterUniquePackageName("proto", nil),
-	}
-
-AllFiles:
-	for _, f := range g.allFiles {
-		for _, genf := range g.genFiles {
-			if f == genf {
-				// In this package already.
-				uniquePackageName[f.FileDescriptorProto] = g.packageName
-				continue AllFiles
-			}
-		}
-		// The file is a dependency, so we want to ignore its go_package option
-		// because that is only relevant for its specific generated output.
-		pkg := f.GetPackage()
-		if pkg == "" {
-			pkg = baseName(*f.Name)
-		}
-		RegisterUniquePackageName(pkg, f)
+		"fmt":   "fmt",
+		"math":  "math",
+		"proto": "proto",
 	}
 }
 
@@ -807,27 +671,51 @@
 func (g *Generator) WrapTypes() {
 	g.allFiles = make([]*FileDescriptor, 0, len(g.Request.ProtoFile))
 	g.allFilesByName = make(map[string]*FileDescriptor, len(g.allFiles))
+	genFileNames := make(map[string]bool)
+	for _, n := range g.Request.FileToGenerate {
+		genFileNames[n] = true
+	}
 	for _, f := range g.Request.ProtoFile {
-		// We must wrap the descriptors before we wrap the enums
-		descs := wrapDescriptors(f)
-		g.buildNestedDescriptors(descs)
-		enums := wrapEnumDescriptors(f, descs)
-		g.buildNestedEnums(descs, enums)
-		exts := wrapExtensions(f)
 		fd := &FileDescriptor{
 			FileDescriptorProto: f,
-			desc:                descs,
-			enum:                enums,
-			ext:                 exts,
 			exported:            make(map[Object][]symbol),
 			proto3:              fileIsProto3(f),
 		}
+		// The import path may be set in a number of ways.
+		if substitution, ok := g.ImportMap[f.GetName()]; ok {
+			// Command-line: M=foo.proto=quux/bar.
+			//
+			// Explicit mapping of source file to import path.
+			fd.importPath = GoImportPath(substitution)
+		} else if genFileNames[f.GetName()] && g.PackageImportPath != "" {
+			// Command-line: import_path=quux/bar.
+			//
+			// The import_path flag sets the import path for every file that
+			// we generate code for.
+			fd.importPath = GoImportPath(g.PackageImportPath)
+		} else if p, _, _ := fd.goPackageOption(); p != "" {
+			// Source file: option go_package = "quux/bar";
+			//
+			// The go_package option sets the import path. Most users should use this.
+			fd.importPath = p
+		} else {
+			// Source filename.
+			//
+			// Last resort when nothing else is available.
+			fd.importPath = GoImportPath(path.Dir(f.GetName()))
+		}
+		// We must wrap the descriptors before we wrap the enums
+		fd.desc = wrapDescriptors(fd)
+		g.buildNestedDescriptors(fd.desc)
+		fd.enum = wrapEnumDescriptors(fd, fd.desc)
+		g.buildNestedEnums(fd.desc, fd.enum)
+		fd.ext = wrapExtensions(fd)
 		extractComments(fd)
 		g.allFiles = append(g.allFiles, fd)
 		g.allFilesByName[f.GetName()] = fd
 	}
 	for _, fd := range g.allFiles {
-		fd.imp = wrapImported(fd.FileDescriptorProto, g)
+		fd.imp = wrapImported(fd, g)
 	}
 
 	g.genFiles = make([]*FileDescriptor, 0, len(g.Request.FileToGenerate))
@@ -836,11 +724,27 @@
 		if fd == nil {
 			g.Fail("could not find file named", fileName)
 		}
-		fd.index = len(g.genFiles)
+		fingerprint, err := fingerprintProto(fd.FileDescriptorProto)
+		if err != nil {
+			g.Error(err)
+		}
+		fd.fingerprint = fingerprint
 		g.genFiles = append(g.genFiles, fd)
 	}
 }
 
+// fingerprintProto returns a fingerprint for a message.
+// The fingerprint is intended to prevent conflicts between generated fileds,
+// not to provide cryptographic security.
+func fingerprintProto(m proto.Message) (string, error) {
+	b, err := proto.Marshal(m)
+	if err != nil {
+		return "", err
+	}
+	h := sha256.Sum256(b)
+	return hex.EncodeToString(h[:8]), nil
+}
+
 // Scan the descriptors in this file.  For each one, build the slice of nested descriptors
 func (g *Generator) buildNestedDescriptors(descs []*Descriptor) {
 	for _, desc := range descs {
@@ -873,7 +777,7 @@
 }
 
 // Construct the Descriptor
-func newDescriptor(desc *descriptor.DescriptorProto, parent *Descriptor, file *descriptor.FileDescriptorProto, index int) *Descriptor {
+func newDescriptor(desc *descriptor.DescriptorProto, parent *Descriptor, file *FileDescriptor, index int) *Descriptor {
 	d := &Descriptor{
 		common:          common{file},
 		DescriptorProto: desc,
@@ -910,7 +814,7 @@
 }
 
 // Return a slice of all the Descriptors defined within this file
-func wrapDescriptors(file *descriptor.FileDescriptorProto) []*Descriptor {
+func wrapDescriptors(file *FileDescriptor) []*Descriptor {
 	sl := make([]*Descriptor, 0, len(file.MessageType)+10)
 	for i, desc := range file.MessageType {
 		sl = wrapThisDescriptor(sl, desc, nil, file, i)
@@ -919,7 +823,7 @@
 }
 
 // Wrap this Descriptor, recursively
-func wrapThisDescriptor(sl []*Descriptor, desc *descriptor.DescriptorProto, parent *Descriptor, file *descriptor.FileDescriptorProto, index int) []*Descriptor {
+func wrapThisDescriptor(sl []*Descriptor, desc *descriptor.DescriptorProto, parent *Descriptor, file *FileDescriptor, index int) []*Descriptor {
 	sl = append(sl, newDescriptor(desc, parent, file, index))
 	me := sl[len(sl)-1]
 	for i, nested := range desc.NestedType {
@@ -929,7 +833,7 @@
 }
 
 // Construct the EnumDescriptor
-func newEnumDescriptor(desc *descriptor.EnumDescriptorProto, parent *Descriptor, file *descriptor.FileDescriptorProto, index int) *EnumDescriptor {
+func newEnumDescriptor(desc *descriptor.EnumDescriptorProto, parent *Descriptor, file *FileDescriptor, index int) *EnumDescriptor {
 	ed := &EnumDescriptor{
 		common:              common{file},
 		EnumDescriptorProto: desc,
@@ -945,7 +849,7 @@
 }
 
 // Return a slice of all the EnumDescriptors defined within this file
-func wrapEnumDescriptors(file *descriptor.FileDescriptorProto, descs []*Descriptor) []*EnumDescriptor {
+func wrapEnumDescriptors(file *FileDescriptor, descs []*Descriptor) []*EnumDescriptor {
 	sl := make([]*EnumDescriptor, 0, len(file.EnumType)+10)
 	// Top-level enums.
 	for i, enum := range file.EnumType {
@@ -961,7 +865,7 @@
 }
 
 // Return a slice of all the top-level ExtensionDescriptors defined within this file.
-func wrapExtensions(file *descriptor.FileDescriptorProto) []*ExtensionDescriptor {
+func wrapExtensions(file *FileDescriptor) []*ExtensionDescriptor {
 	var sl []*ExtensionDescriptor
 	for _, field := range file.Extension {
 		sl = append(sl, &ExtensionDescriptor{common{file}, field, nil})
@@ -970,7 +874,7 @@
 }
 
 // Return a slice of all the types that are publicly imported into this file.
-func wrapImported(file *descriptor.FileDescriptorProto, g *Generator) (sl []*ImportedDescriptor) {
+func wrapImported(file *FileDescriptor, g *Generator) (sl []*ImportedDescriptor) {
 	for _, index := range file.PublicDependency {
 		df := g.fileByName(file.Dependency[index])
 		for _, d := range df.desc {
@@ -1070,35 +974,84 @@
 	return o
 }
 
+// AnnotatedAtoms is a list of atoms (as consumed by P) that records the file name and proto AST path from which they originated.
+type AnnotatedAtoms struct {
+	source string
+	path   string
+	atoms  []interface{}
+}
+
+// Annotate records the file name and proto AST path of a list of atoms
+// so that a later call to P can emit a link from each atom to its origin.
+func Annotate(file *FileDescriptor, path string, atoms ...interface{}) *AnnotatedAtoms {
+	return &AnnotatedAtoms{source: *file.Name, path: path, atoms: atoms}
+}
+
+// printAtom prints the (atomic, non-annotation) argument to the generated output.
+func (g *Generator) printAtom(v interface{}) {
+	switch v := v.(type) {
+	case string:
+		g.WriteString(v)
+	case *string:
+		g.WriteString(*v)
+	case bool:
+		fmt.Fprint(g, v)
+	case *bool:
+		fmt.Fprint(g, *v)
+	case int:
+		fmt.Fprint(g, v)
+	case *int32:
+		fmt.Fprint(g, *v)
+	case *int64:
+		fmt.Fprint(g, *v)
+	case float64:
+		fmt.Fprint(g, v)
+	case *float64:
+		fmt.Fprint(g, *v)
+	case GoPackageName:
+		g.WriteString(string(v))
+	case GoImportPath:
+		g.WriteString(strconv.Quote(string(v)))
+	default:
+		g.Fail(fmt.Sprintf("unknown type in printer: %T", v))
+	}
+}
+
 // P prints the arguments to the generated output.  It handles strings and int32s, plus
-// handling indirections because they may be *string, etc.
+// handling indirections because they may be *string, etc.  Any inputs of type AnnotatedAtoms may emit
+// annotations in a .meta file in addition to outputting the atoms themselves (if g.annotateCode
+// is true).
 func (g *Generator) P(str ...interface{}) {
 	if !g.writeOutput {
 		return
 	}
 	g.WriteString(g.indent)
 	for _, v := range str {
-		switch s := v.(type) {
-		case string:
-			g.WriteString(s)
-		case *string:
-			g.WriteString(*s)
-		case bool:
-			fmt.Fprintf(g, "%t", s)
-		case *bool:
-			fmt.Fprintf(g, "%t", *s)
-		case int:
-			fmt.Fprintf(g, "%d", s)
-		case *int32:
-			fmt.Fprintf(g, "%d", *s)
-		case *int64:
-			fmt.Fprintf(g, "%d", *s)
-		case float64:
-			fmt.Fprintf(g, "%g", s)
-		case *float64:
-			fmt.Fprintf(g, "%g", *s)
+		switch v := v.(type) {
+		case *AnnotatedAtoms:
+			begin := int32(g.Len())
+			for _, v := range v.atoms {
+				g.printAtom(v)
+			}
+			if g.annotateCode {
+				end := int32(g.Len())
+				var path []int32
+				for _, token := range strings.Split(v.path, ",") {
+					val, err := strconv.ParseInt(token, 10, 32)
+					if err != nil {
+						g.Fail("could not parse proto AST path: ", err.Error())
+					}
+					path = append(path, int32(val))
+				}
+				g.annotations = append(g.annotations, &descriptor.GeneratedCodeInfo_Annotation{
+					Path:       path,
+					SourceFile: &v.source,
+					Begin:      &begin,
+					End:        &end,
+				})
+			}
 		default:
-			g.Fail(fmt.Sprintf("unknown type in printer: %T", v))
+			g.printAtom(v)
 		}
 	}
 	g.WriteByte('\n')
@@ -1135,15 +1088,25 @@
 	}
 	for _, file := range g.allFiles {
 		g.Reset()
+		g.annotations = nil
 		g.writeOutput = genFileMap[file]
 		g.generate(file)
 		if !g.writeOutput {
 			continue
 		}
+		fname := file.goFileName(g.pathType)
 		g.Response.File = append(g.Response.File, &plugin.CodeGeneratorResponse_File{
-			Name:    proto.String(file.goFileName()),
+			Name:    proto.String(fname),
 			Content: proto.String(g.String()),
 		})
+		if g.annotateCode {
+			// Store the generated code annotations in text, as the protoc plugin protocol requires that
+			// strings contain valid UTF-8.
+			g.Response.File = append(g.Response.File, &plugin.CodeGeneratorResponse_File{
+				Name:    proto.String(file.goFileName(g.pathType) + ".meta"),
+				Content: proto.String(proto.CompactTextString(&descriptor.GeneratedCodeInfo{Annotation: g.annotations})),
+			})
+		}
 	}
 }
 
@@ -1154,32 +1117,24 @@
 	}
 }
 
-// FileOf return the FileDescriptor for this FileDescriptorProto.
-func (g *Generator) FileOf(fd *descriptor.FileDescriptorProto) *FileDescriptor {
-	for _, file := range g.allFiles {
-		if file.FileDescriptorProto == fd {
-			return file
-		}
-	}
-	g.Fail("could not find file in table:", fd.GetName())
-	return nil
-}
-
 // Fill the response protocol buffer with the generated output for all the files we're
 // supposed to generate.
 func (g *Generator) generate(file *FileDescriptor) {
-	g.file = g.FileOf(file.FileDescriptorProto)
-	g.usedPackages = make(map[string]bool)
-
-	if g.file.index == 0 {
-		// For one file in the package, assert version compatibility.
-		g.P("// This is a compile-time assertion to ensure that this generated file")
-		g.P("// is compatible with the proto package it is being compiled against.")
-		g.P("// A compilation error at this line likely means your copy of the")
-		g.P("// proto package needs to be updated.")
-		g.P("const _ = ", g.Pkg["proto"], ".ProtoPackageIsVersion", generatedCodeVersion, " // please upgrade the proto package")
-		g.P()
+	g.file = file
+	g.usedPackages = make(map[GoImportPath]bool)
+	g.packageNames = make(map[GoImportPath]GoPackageName)
+	g.usedPackageNames = make(map[GoPackageName]bool)
+	for name := range globalPackageNames {
+		g.usedPackageNames[name] = true
 	}
+
+	g.P("// This is a compile-time assertion to ensure that this generated file")
+	g.P("// is compatible with the proto package it is being compiled against.")
+	g.P("// A compilation error at this line likely means your copy of the")
+	g.P("// proto package needs to be updated.")
+	g.P("const _ = ", g.Pkg["proto"], ".ProtoPackageIsVersion", generatedCodeVersion, " // please upgrade the proto package")
+	g.P()
+
 	for _, td := range g.file.imp {
 		g.generateImported(td)
 	}
@@ -1205,24 +1160,36 @@
 
 	// Generate header and imports last, though they appear first in the output.
 	rem := g.Buffer
+	remAnno := g.annotations
 	g.Buffer = new(bytes.Buffer)
+	g.annotations = nil
 	g.generateHeader()
 	g.generateImports()
 	if !g.writeOutput {
 		return
 	}
+	// Adjust the offsets for annotations displaced by the header and imports.
+	for _, anno := range remAnno {
+		*anno.Begin += int32(g.Len())
+		*anno.End += int32(g.Len())
+		g.annotations = append(g.annotations, anno)
+	}
 	g.Write(rem.Bytes())
 
-	// Reformat generated code.
+	// Reformat generated code and patch annotation locations.
 	fset := token.NewFileSet()
-	raw := g.Bytes()
-	ast, err := parser.ParseFile(fset, "", g, parser.ParseComments)
+	original := g.Bytes()
+	if g.annotateCode {
+		// make a copy independent of g; we'll need it after Reset.
+		original = append([]byte(nil), original...)
+	}
+	ast, err := parser.ParseFile(fset, "", original, parser.ParseComments)
 	if err != nil {
 		// Print out the bad code with line numbers.
 		// This should never happen in practice, but it can while changing generated code,
 		// so consider this a debugging aid.
 		var src bytes.Buffer
-		s := bufio.NewScanner(bytes.NewReader(raw))
+		s := bufio.NewScanner(bytes.NewReader(original))
 		for line := 1; s.Scan(); line++ {
 			fmt.Fprintf(&src, "%5d\t%s\n", line, s.Bytes())
 		}
@@ -1233,55 +1200,59 @@
 	if err != nil {
 		g.Fail("generated Go source code could not be reformatted:", err.Error())
 	}
+	if g.annotateCode {
+		m, err := remap.Compute(original, g.Bytes())
+		if err != nil {
+			g.Fail("formatted generated Go source code could not be mapped back to the original code:", err.Error())
+		}
+		for _, anno := range g.annotations {
+			new, ok := m.Find(int(*anno.Begin), int(*anno.End))
+			if !ok {
+				g.Fail("span in formatted generated Go source code could not be mapped back to the original code")
+			}
+			*anno.Begin = int32(new.Pos)
+			*anno.End = int32(new.End)
+		}
+	}
 }
 
 // Generate the header, including package definition
 func (g *Generator) generateHeader() {
 	g.P("// Code generated by protoc-gen-go. DO NOT EDIT.")
-	g.P("// source: ", g.file.Name)
+	if g.file.GetOptions().GetDeprecated() {
+		g.P("// ", g.file.Name, " is a deprecated file.")
+	} else {
+		g.P("// source: ", g.file.Name)
+	}
 	g.P()
 
-	name := g.file.PackageName()
+	importPath, _, _ := g.file.goPackageOption()
+	if importPath == "" {
+		g.P("package ", g.file.packageName)
+	} else {
+		g.P("package ", g.file.packageName, " // import ", GoImportPath(g.ImportPrefix)+importPath)
+	}
+	g.P()
 
-	if g.file.index == 0 {
-		// Generate package docs for the first file in the package.
+	if loc, ok := g.file.comments[strconv.Itoa(packagePath)]; ok {
 		g.P("/*")
-		g.P("Package ", name, " is a generated protocol buffer package.")
-		g.P()
-		if loc, ok := g.file.comments[strconv.Itoa(packagePath)]; ok {
-			// not using g.PrintComments because this is a /* */ comment block.
-			text := strings.TrimSuffix(loc.GetLeadingComments(), "\n")
-			for _, line := range strings.Split(text, "\n") {
-				line = strings.TrimPrefix(line, " ")
-				// ensure we don't escape from the block comment
-				line = strings.Replace(line, "*/", "* /", -1)
-				g.P(line)
-			}
-			g.P()
-		}
-		var topMsgs []string
-		g.P("It is generated from these files:")
-		for _, f := range g.genFiles {
-			g.P("\t", f.Name)
-			for _, msg := range f.desc {
-				if msg.parent != nil {
-					continue
-				}
-				topMsgs = append(topMsgs, CamelCaseSlice(msg.TypeName()))
-			}
-		}
-		g.P()
-		g.P("It has these top-level messages:")
-		for _, msg := range topMsgs {
-			g.P("\t", msg)
+		// not using g.PrintComments because this is a /* */ comment block.
+		text := strings.TrimSuffix(loc.GetLeadingComments(), "\n")
+		for _, line := range strings.Split(text, "\n") {
+			line = strings.TrimPrefix(line, " ")
+			// ensure we don't escape from the block comment
+			line = strings.Replace(line, "*/", "* /", -1)
+			g.P(line)
 		}
 		g.P("*/")
+		g.P()
 	}
-
-	g.P("package ", name)
-	g.P()
 }
 
+// deprecationComment is the standard comment added to deprecated
+// messages, fields, enums, and enum values.
+var deprecationComment = "// Deprecated: Do not use."
+
 // PrintComments prints any comments from the source .proto file.
 // The path is a comma-separated list of integers.
 // It returns an indication of whether any comments were printed.
@@ -1319,35 +1290,46 @@
 	// We almost always need a proto import.  Rather than computing when we
 	// do, which is tricky when there's a plugin, just import it and
 	// reference it later. The same argument applies to the fmt and math packages.
-	g.P("import " + g.Pkg["proto"] + " " + strconv.Quote(g.ImportPrefix+"github.com/golang/protobuf/proto"))
+	g.P("import "+g.Pkg["proto"]+" ", GoImportPath(g.ImportPrefix)+"github.com/golang/protobuf/proto")
 	g.P("import " + g.Pkg["fmt"] + ` "fmt"`)
 	g.P("import " + g.Pkg["math"] + ` "math"`)
+	var (
+		imports       = make(map[GoImportPath]bool)
+		strongImports = make(map[GoImportPath]bool)
+		importPaths   []string
+	)
 	for i, s := range g.file.Dependency {
 		fd := g.fileByName(s)
+		importPath := fd.importPath
 		// Do not import our own package.
-		if fd.PackageName() == g.packageName {
+		if importPath == g.file.importPath {
 			continue
 		}
-		filename := fd.goFileName()
-		// By default, import path is the dirname of the Go filename.
-		importPath := path.Dir(filename)
-		if substitution, ok := g.ImportMap[s]; ok {
-			importPath = substitution
+		if !imports[importPath] {
+			importPaths = append(importPaths, string(importPath))
 		}
-		importPath = g.ImportPrefix + importPath
+		imports[importPath] = true
+		if !g.weak(int32(i)) {
+			strongImports[importPath] = true
+		}
+	}
+	sort.Strings(importPaths)
+	for i := range importPaths {
+		importPath := GoImportPath(importPaths[i])
+		packageName := g.GoPackageName(importPath)
+		fullPath := GoImportPath(g.ImportPrefix) + importPath
 		// Skip weak imports.
-		if g.weak(int32(i)) {
-			g.P("// skipping weak import ", fd.PackageName(), " ", strconv.Quote(importPath))
+		if !strongImports[importPath] {
+			g.P("// skipping weak import ", packageName, " ", fullPath)
 			continue
 		}
 		// We need to import all the dependencies, even if we don't reference them,
 		// because other code and tools depend on having the full transitive closure
 		// of protocol buffer types in the binary.
-		pname := fd.PackageName()
-		if _, ok := g.usedPackages[pname]; !ok {
-			pname = "_"
+		if _, ok := g.usedPackages[importPath]; !ok {
+			packageName = "_"
 		}
-		g.P("import ", pname, " ", strconv.Quote(importPath))
+		g.P("import ", packageName, " ", fullPath)
 	}
 	g.P()
 	// TODO: may need to worry about uniqueness across plugins
@@ -1363,26 +1345,24 @@
 }
 
 func (g *Generator) generateImported(id *ImportedDescriptor) {
-	// Don't generate public import symbols for files that we are generating
-	// code for, since those symbols will already be in this package.
-	// We can't simply avoid creating the ImportedDescriptor objects,
-	// because g.genFiles isn't populated at that stage.
 	tn := id.TypeName()
 	sn := tn[len(tn)-1]
-	df := g.FileOf(id.o.File())
+	df := id.o.File()
 	filename := *df.Name
-	for _, fd := range g.genFiles {
-		if *fd.Name == filename {
-			g.P("// Ignoring public import of ", sn, " from ", filename)
-			g.P()
-			return
-		}
+	if df.importPath == g.file.importPath {
+		// Don't generate type aliases for files in the same Go package as this one.
+		g.P("// Ignoring public import of ", sn, " from ", filename)
+		g.P()
+		return
+	}
+	if !supportTypeAliases {
+		g.Fail(fmt.Sprintf("%s: public imports require at least go1.9", filename))
 	}
 	g.P("// ", sn, " from public import ", filename)
-	g.usedPackages[df.PackageName()] = true
+	g.usedPackages[df.importPath] = true
 
 	for _, sym := range df.exported[id.o] {
-		sym.GenerateAlias(g, df.PackageName())
+		sym.GenerateAlias(g, g.GoPackageName(df.importPath))
 	}
 
 	g.P()
@@ -1396,16 +1376,26 @@
 	ccTypeName := CamelCaseSlice(typeName)
 	ccPrefix := enum.prefix()
 
+	deprecatedEnum := ""
+	if enum.GetOptions().GetDeprecated() {
+		deprecatedEnum = deprecationComment
+	}
 	g.PrintComments(enum.path)
-	g.P("type ", ccTypeName, " int32")
+	g.P("type ", Annotate(enum.file, enum.path, ccTypeName), " int32", deprecatedEnum)
 	g.file.addExport(enum, enumSymbol{ccTypeName, enum.proto3()})
 	g.P("const (")
 	g.In()
 	for i, e := range enum.Value {
-		g.PrintComments(fmt.Sprintf("%s,%d,%d", enum.path, enumValuePath, i))
+		etorPath := fmt.Sprintf("%s,%d,%d", enum.path, enumValuePath, i)
+		g.PrintComments(etorPath)
+
+		deprecatedValue := ""
+		if e.GetOptions().GetDeprecated() {
+			deprecatedValue = deprecationComment
+		}
 
 		name := ccPrefix + *e.Name
-		g.P(name, " ", ccTypeName, " = ", e.Number)
+		g.P(Annotate(enum.file, etorPath, name), " ", ccTypeName, " = ", e.Number, " ", deprecatedValue)
 		g.file.addExport(enum, constOrVarSymbol{name, "const", ccTypeName})
 	}
 	g.Out()
@@ -1468,7 +1458,11 @@
 		indexes = append([]string{strconv.Itoa(m.index)}, indexes...)
 	}
 	indexes = append(indexes, strconv.Itoa(enum.index))
-	g.P("func (", ccTypeName, ") EnumDescriptor() ([]byte, []int) { return ", g.file.VarName(), ", []int{", strings.Join(indexes, ", "), "} }")
+	g.P("func (", ccTypeName, ") EnumDescriptor() ([]byte, []int) {")
+	g.In()
+	g.P("return ", g.file.VarName(), ", []int{", strings.Join(indexes, ", "), "}")
+	g.Out()
+	g.P("}")
 	if enum.file.GetPackage() == "google.protobuf" && enum.GetName() == "NullValue" {
 		g.P("func (", ccTypeName, `) XXX_WellKnownType() string { return "`, enum.GetName(), `" }`)
 	}
@@ -1535,7 +1529,7 @@
 	}
 	enum := ""
 	if *field.Type == descriptor.FieldDescriptorProto_TYPE_ENUM {
-		// We avoid using obj.PackageName(), because we want to use the
+		// We avoid using obj.GoPackageName(), because we want to use the
 		// original (proto-world) package name.
 		obj := g.ObjectNamed(field.GetTypeName())
 		if id, ok := obj.(*ImportedDescriptor); ok {
@@ -1617,12 +1611,6 @@
 	return g.DefaultPackageName(obj) + CamelCaseSlice(obj.TypeName())
 }
 
-// TypeNameWithPackage is like TypeName, but always includes the package
-// name even if the object is in our own package.
-func (g *Generator) TypeNameWithPackage(obj Object) string {
-	return obj.PackageName() + CamelCaseSlice(obj.TypeName())
-}
-
 // GoType returns a string representing the type name, and the wire type
 func (g *Generator) GoType(message *Descriptor, field *descriptor.FieldDescriptorProto) (typ string, wire string) {
 	// TODO: Options.
@@ -1682,10 +1670,10 @@
 }
 
 func (g *Generator) RecordTypeUse(t string) {
-	if obj, ok := g.typeNameToObject[t]; ok {
+	if _, ok := g.typeNameToObject[t]; ok {
 		// Call ObjectNamed to get the true object to record the use.
-		obj = g.ObjectNamed(t)
-		g.usedPackages[obj.PackageName()] = true
+		obj := g.ObjectNamed(t)
+		g.usedPackages[obj.GoImportPath()] = true
 	}
 }
 
@@ -1746,8 +1734,19 @@
 	oneofTypeName := make(map[*descriptor.FieldDescriptorProto]string) // without star
 	oneofInsertPoints := make(map[int32]int)                           // oneof_index => offset of g.Buffer
 
-	g.PrintComments(message.path)
-	g.P("type ", ccTypeName, " struct {")
+	comments := g.PrintComments(message.path)
+
+	// Guarantee deprecation comments appear after user-provided comments.
+	if message.GetOptions().GetDeprecated() {
+		if comments {
+			// Convention: Separate deprecation comments from original
+			// comments with an empty line.
+			g.P("//")
+		}
+		g.P(deprecationComment)
+	}
+
+	g.P("type ", Annotate(message.file, message.path, ccTypeName), " struct {")
 	g.In()
 
 	// allocNames finds a conflict-free variation of the given strings,
@@ -1794,7 +1793,8 @@
 
 			// This is the first field of a oneof we haven't seen before.
 			// Generate the union field.
-			com := g.PrintComments(fmt.Sprintf("%s,%d,%d", message.path, messageOneofPath, *field.OneofIndex))
+			oneofFullPath := fmt.Sprintf("%s,%d,%d", message.path, messageOneofPath, *field.OneofIndex)
+			com := g.PrintComments(oneofFullPath)
 			if com {
 				g.P("//")
 			}
@@ -1807,7 +1807,7 @@
 			oneofFieldName[*field.OneofIndex] = fname
 			oneofDisc[*field.OneofIndex] = dname
 			tag := `protobuf_oneof:"` + odp.GetName() + `"`
-			g.P(fname, " ", dname, " `", tag, "`")
+			g.P(Annotate(message.file, oneofFullPath, fname), " ", dname, " `", tag, "`")
 		}
 
 		if *field.Type == descriptor.FieldDescriptorProto_TYPE_MESSAGE {
@@ -1871,16 +1871,26 @@
 			continue
 		}
 
-		g.PrintComments(fmt.Sprintf("%s,%d,%d", message.path, messageFieldPath, i))
-		g.P(fieldName, "\t", typename, "\t`", tag, "`")
+		fieldDeprecated := ""
+		if field.GetOptions().GetDeprecated() {
+			fieldDeprecated = deprecationComment
+		}
+
+		fieldFullPath := fmt.Sprintf("%s,%d,%d", message.path, messageFieldPath, i)
+		g.PrintComments(fieldFullPath)
+		g.P(Annotate(message.file, fieldFullPath, fieldName), "\t", typename, "\t`", tag, "`", fieldDeprecated)
 		g.RecordTypeUse(field.GetTypeName())
 	}
+	g.P("XXX_NoUnkeyedLiteral\tstruct{} `json:\"-\"`") // prevent unkeyed struct literals
 	if len(message.ExtensionRange) > 0 {
-		g.P(g.Pkg["proto"], ".XXX_InternalExtensions `json:\"-\"`")
+		messageset := ""
+		if opts := message.Options; opts != nil && opts.GetMessageSetWireFormat() {
+			messageset = "protobuf_messageset:\"1\" "
+		}
+		g.P(g.Pkg["proto"], ".XXX_InternalExtensions `", messageset, "json:\"-\"`")
 	}
-	if !message.proto3() {
-		g.P("XXX_unrecognized\t[]byte `json:\"-\"`")
-	}
+	g.P("XXX_unrecognized\t[]byte `json:\"-\"`")
+	g.P("XXX_sizecache\tint32 `json:\"-\"`")
 	g.Out()
 	g.P("}")
 
@@ -1892,12 +1902,25 @@
 		all := g.Buffer.Bytes()
 		rem := all[ip:]
 		g.Buffer = bytes.NewBuffer(all[:ip:ip]) // set cap so we don't scribble on rem
+		oldLen := g.Buffer.Len()
 		for _, field := range message.Field {
 			if field.OneofIndex == nil || *field.OneofIndex != oi {
 				continue
 			}
 			g.P("//\t*", oneofTypeName[field])
 		}
+		// If we've inserted text, we also need to fix up affected annotations (as
+		// they contain offsets that may need to be changed).
+		offset := int32(g.Buffer.Len() - oldLen)
+		ip32 := int32(ip)
+		for _, anno := range g.annotations {
+			if *anno.Begin >= ip32 {
+				*anno.Begin += offset
+			}
+			if *anno.End >= ip32 {
+				*anno.End += offset
+			}
+		}
 		g.Buffer.Write(rem)
 	}
 
@@ -1909,7 +1932,11 @@
 	for m := message; m != nil; m = m.parent {
 		indexes = append([]string{strconv.Itoa(m.index)}, indexes...)
 	}
-	g.P("func (*", ccTypeName, ") Descriptor() ([]byte, []int) { return ", g.file.VarName(), ", []int{", strings.Join(indexes, ", "), "} }")
+	g.P("func (*", ccTypeName, ") Descriptor() ([]byte, []int) {")
+	g.In()
+	g.P("return ", g.file.VarName(), ", []int{", strings.Join(indexes, ", "), "}")
+	g.Out()
+	g.P("}")
 	// TODO: Revisit the decision to use a XXX_WellKnownType method
 	// if we change proto.MessageName to work with multiple equivalents.
 	if message.file.GetPackage() == "google.protobuf" && wellKnownTypes[message.GetName()] {
@@ -1924,16 +1951,6 @@
 		if opts := message.Options; opts != nil && opts.GetMessageSetWireFormat() {
 			isMessageSet = true
 			g.P()
-			g.P("func (m *", ccTypeName, ") Marshal() ([]byte, error) {")
-			g.In()
-			g.P("return ", g.Pkg["proto"], ".MarshalMessageSet(&m.XXX_InternalExtensions)")
-			g.Out()
-			g.P("}")
-			g.P("func (m *", ccTypeName, ") Unmarshal(buf []byte) error {")
-			g.In()
-			g.P("return ", g.Pkg["proto"], ".UnmarshalMessageSet(buf, &m.XXX_InternalExtensions)")
-			g.Out()
-			g.P("}")
 			g.P("func (m *", ccTypeName, ") MarshalJSON() ([]byte, error) {")
 			g.In()
 			g.P("return ", g.Pkg["proto"], ".MarshalMessageSetJSON(&m.XXX_InternalExtensions)")
@@ -1944,9 +1961,6 @@
 			g.P("return ", g.Pkg["proto"], ".UnmarshalMessageSetJSON(buf, &m.XXX_InternalExtensions)")
 			g.Out()
 			g.P("}")
-			g.P("// ensure ", ccTypeName, " satisfies proto.Marshaler and proto.Unmarshaler")
-			g.P("var _ ", g.Pkg["proto"], ".Marshaler = (*", ccTypeName, ")(nil)")
-			g.P("var _ ", g.Pkg["proto"], ".Unmarshaler = (*", ccTypeName, ")(nil)")
 		}
 
 		g.P()
@@ -1954,7 +1968,7 @@
 		g.In()
 		for _, r := range message.ExtensionRange {
 			end := fmt.Sprint(*r.End - 1) // make range inclusive on both ends
-			g.P("{", r.Start, ", ", end, "},")
+			g.P("{Start: ", r.Start, ", End: ", end, "},")
 		}
 		g.Out()
 		g.P("}")
@@ -1965,6 +1979,45 @@
 		g.P("}")
 	}
 
+	// TODO: It does not scale to keep adding another method for every
+	// operation on protos that we want to switch over to using the
+	// table-driven approach. Instead, we should only add a single method
+	// that allows getting access to the *InternalMessageInfo struct and then
+	// calling Unmarshal, Marshal, Merge, Size, and Discard directly on that.
+
+	// Wrapper for table-driven marshaling and unmarshaling.
+	g.P("func (m *", ccTypeName, ") XXX_Unmarshal(b []byte) error {")
+	g.In()
+	g.P("return xxx_messageInfo_", ccTypeName, ".Unmarshal(m, b)")
+	g.Out()
+	g.P("}")
+
+	g.P("func (m *", ccTypeName, ") XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {")
+	g.In()
+	g.P("return xxx_messageInfo_", ccTypeName, ".Marshal(b, m, deterministic)")
+	g.Out()
+	g.P("}")
+
+	g.P("func (dst *", ccTypeName, ") XXX_Merge(src ", g.Pkg["proto"], ".Message) {")
+	g.In()
+	g.P("xxx_messageInfo_", ccTypeName, ".Merge(dst, src)")
+	g.Out()
+	g.P("}")
+
+	g.P("func (m *", ccTypeName, ") XXX_Size() int {") // avoid name clash with "Size" field in some message
+	g.In()
+	g.P("return xxx_messageInfo_", ccTypeName, ".Size(m)")
+	g.Out()
+	g.P("}")
+
+	g.P("func (m *", ccTypeName, ") XXX_DiscardUnknown() {")
+	g.In()
+	g.P("xxx_messageInfo_", ccTypeName, ".DiscardUnknown(m)")
+	g.Out()
+	g.P("}")
+
+	g.P("var xxx_messageInfo_", ccTypeName, " ", g.Pkg["proto"], ".InternalMessageInfo")
+
 	// Default constants
 	defNames := make(map[*descriptor.FieldDescriptorProto]string)
 	for _, field := range message.Field {
@@ -2036,14 +2089,17 @@
 		g.P("}")
 	}
 	g.P()
-	for _, field := range message.Field {
+	var oneofTypes []string
+	for i, field := range message.Field {
 		if field.OneofIndex == nil {
 			continue
 		}
 		_, wiretype := g.GoType(message, field)
 		tag := "protobuf:" + g.goTag(message, field, wiretype)
-		g.P("type ", oneofTypeName[field], " struct{ ", fieldNames[field], " ", fieldTypes[field], " `", tag, "` }")
+		fieldFullPath := fmt.Sprintf("%s,%d,%d", message.path, messageFieldPath, i)
+		g.P("type ", Annotate(message.file, fieldFullPath, oneofTypeName[field]), " struct{ ", Annotate(message.file, fieldFullPath, fieldNames[field]), " ", fieldTypes[field], " `", tag, "` }")
 		g.RecordTypeUse(field.GetTypeName())
+		oneofTypes = append(oneofTypes, oneofTypeName[field])
 	}
 	g.P()
 	for _, field := range message.Field {
@@ -2055,7 +2111,8 @@
 	g.P()
 	for oi := range message.OneofDecl {
 		fname := oneofFieldName[int32(oi)]
-		g.P("func (m *", ccTypeName, ") Get", fname, "() ", oneofDisc[int32(oi)], " {")
+		oneofFullPath := fmt.Sprintf("%s,%d,%d", message.path, messageOneofPath, oi)
+		g.P("func (m *", ccTypeName, ") ", Annotate(message.file, oneofFullPath, "Get"+fname), "() ", oneofDisc[int32(oi)], " {")
 		g.P("if m != nil { return m.", fname, " }")
 		g.P("return nil")
 		g.P("}")
@@ -2063,8 +2120,7 @@
 	g.P()
 
 	// Field getters
-	var getters []getterSymbol
-	for _, field := range message.Field {
+	for i, field := range message.Field {
 		oneof := field.OneofIndex != nil
 
 		fname := fieldNames[field]
@@ -2078,38 +2134,13 @@
 			typename = typename[1:]
 			star = "*"
 		}
+		fieldFullPath := fmt.Sprintf("%s,%d,%d", message.path, messageFieldPath, i)
 
-		// Only export getter symbols for basic types,
-		// and for messages and enums in the same package.
-		// Groups are not exported.
-		// Foreign types can't be hoisted through a public import because
-		// the importer may not already be importing the defining .proto.
-		// As an example, imagine we have an import tree like this:
-		//   A.proto -> B.proto -> C.proto
-		// If A publicly imports B, we need to generate the getters from B in A's output,
-		// but if one such getter returns something from C then we cannot do that
-		// because A is not importing C already.
-		var getter, genType bool
-		switch *field.Type {
-		case descriptor.FieldDescriptorProto_TYPE_GROUP:
-			getter = false
-		case descriptor.FieldDescriptorProto_TYPE_MESSAGE, descriptor.FieldDescriptorProto_TYPE_ENUM:
-			// Only export getter if its return type is in this package.
-			getter = g.ObjectNamed(field.GetTypeName()).PackageName() == message.PackageName()
-			genType = true
-		default:
-			getter = true
-		}
-		if getter {
-			getters = append(getters, getterSymbol{
-				name:     mname,
-				typ:      typename,
-				typeName: field.GetTypeName(),
-				genType:  genType,
-			})
+		if field.GetOptions().GetDeprecated() {
+			g.P(deprecationComment)
 		}
 
-		g.P("func (m *", ccTypeName, ") "+mname+"() "+typename+" {")
+		g.P("func (m *", ccTypeName, ") ", Annotate(message.file, fieldFullPath, mname), "() "+typename+" {")
 		g.In()
 		def, hasDef := defNames[field]
 		typeDefaultIsNil := false // whether this field type's default value is a literal nil unless specified
@@ -2207,8 +2238,7 @@
 			sym:           ccTypeName,
 			hasExtensions: hasExtensions,
 			isMessageSet:  isMessageSet,
-			hasOneof:      len(message.OneofDecl) > 0,
-			getters:       getters,
+			oneofTypes:    oneofTypes,
 		}
 		g.file.addExport(message, ms)
 	}
@@ -2428,58 +2458,49 @@
 				}
 				g.P("case *", oneofTypeName[field], ":")
 				val := "x." + fieldNames[field]
-				var wire, varint, fixed string
+				var varint, fixed string
 				switch *field.Type {
 				case descriptor.FieldDescriptorProto_TYPE_DOUBLE:
-					wire = "WireFixed64"
 					fixed = "8"
 				case descriptor.FieldDescriptorProto_TYPE_FLOAT:
-					wire = "WireFixed32"
 					fixed = "4"
 				case descriptor.FieldDescriptorProto_TYPE_INT64,
 					descriptor.FieldDescriptorProto_TYPE_UINT64,
 					descriptor.FieldDescriptorProto_TYPE_INT32,
 					descriptor.FieldDescriptorProto_TYPE_UINT32,
 					descriptor.FieldDescriptorProto_TYPE_ENUM:
-					wire = "WireVarint"
 					varint = val
 				case descriptor.FieldDescriptorProto_TYPE_FIXED64,
 					descriptor.FieldDescriptorProto_TYPE_SFIXED64:
-					wire = "WireFixed64"
 					fixed = "8"
 				case descriptor.FieldDescriptorProto_TYPE_FIXED32,
 					descriptor.FieldDescriptorProto_TYPE_SFIXED32:
-					wire = "WireFixed32"
 					fixed = "4"
 				case descriptor.FieldDescriptorProto_TYPE_BOOL:
-					wire = "WireVarint"
 					fixed = "1"
 				case descriptor.FieldDescriptorProto_TYPE_STRING:
-					wire = "WireBytes"
 					fixed = "len(" + val + ")"
 					varint = fixed
 				case descriptor.FieldDescriptorProto_TYPE_GROUP:
-					wire = "WireStartGroup"
 					fixed = g.Pkg["proto"] + ".Size(" + val + ")"
 				case descriptor.FieldDescriptorProto_TYPE_MESSAGE:
-					wire = "WireBytes"
 					g.P("s := ", g.Pkg["proto"], ".Size(", val, ")")
 					fixed = "s"
 					varint = fixed
 				case descriptor.FieldDescriptorProto_TYPE_BYTES:
-					wire = "WireBytes"
 					fixed = "len(" + val + ")"
 					varint = fixed
 				case descriptor.FieldDescriptorProto_TYPE_SINT32:
-					wire = "WireVarint"
 					varint = "(uint32(" + val + ") << 1) ^ uint32((int32(" + val + ") >> 31))"
 				case descriptor.FieldDescriptorProto_TYPE_SINT64:
-					wire = "WireVarint"
 					varint = "uint64(" + val + " << 1) ^ uint64((int64(" + val + ") >> 63))"
 				default:
 					g.Fail("unhandled oneof field type ", field.Type.String())
 				}
-				g.P("n += ", g.Pkg["proto"], ".SizeVarint(", field.Number, "<<3|", g.Pkg["proto"], ".", wire, ")")
+				// Tag and wire varint is known statically,
+				// so don't generate code for that part of the size computation.
+				tagAndWireSize := proto.SizeVarint(uint64(*field.Number << 3)) // wire doesn't affect varint size
+				g.P("n += ", tagAndWireSize, " // tag and wire")
 				if varint != "" {
 					g.P("n += ", g.Pkg["proto"], ".SizeVarint(uint64(", varint, "))")
 				}
@@ -2487,7 +2508,7 @@
 					g.P("n += ", fixed)
 				}
 				if *field.Type == descriptor.FieldDescriptorProto_TYPE_GROUP {
-					g.P("n += ", g.Pkg["proto"], ".SizeVarint(", field.Number, "<<3|", g.Pkg["proto"], ".WireEndGroup)")
+					g.P("n += ", tagAndWireSize, " // tag and wire")
 				}
 			}
 			g.P("case nil:")
@@ -2510,6 +2531,27 @@
 	}
 
 	g.addInitf("%s.RegisterType((*%s)(nil), %q)", g.Pkg["proto"], ccTypeName, fullName)
+	// Register types for native map types.
+	for _, k := range mapFieldKeys(mapFieldTypes) {
+		fullName := strings.TrimPrefix(*k.TypeName, ".")
+		g.addInitf("%s.RegisterMapType((%s)(nil), %q)", g.Pkg["proto"], mapFieldTypes[k], fullName)
+	}
+}
+
+type byTypeName []*descriptor.FieldDescriptorProto
+
+func (a byTypeName) Len() int           { return len(a) }
+func (a byTypeName) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a byTypeName) Less(i, j int) bool { return *a[i].TypeName < *a[j].TypeName }
+
+// mapFieldKeys returns the keys of m in a consistent order.
+func mapFieldKeys(m map[*descriptor.FieldDescriptorProto]string) []*descriptor.FieldDescriptorProto {
+	keys := make([]*descriptor.FieldDescriptorProto, 0, len(m))
+	for k := range m {
+		keys = append(keys, k)
+	}
+	sort.Sort(byTypeName(keys))
+	return keys
 }
 
 var escapeChars = [256]byte{
@@ -2598,10 +2640,15 @@
 	typeName := ext.TypeName()
 
 	// Special case for proto2 message sets: If this extension is extending
-	// proto2_bridge.MessageSet, and its final name component is "message_set_extension",
+	// proto2.bridge.MessageSet, and its final name component is "message_set_extension",
 	// then drop that last component.
+	//
+	// TODO: This should be implemented in the text formatter rather than the generator.
+	// In addition, the situation for when to apply this special case is implemented
+	// differently in other languages:
+	// https://github.com/google/protobuf/blob/aff10976/src/google/protobuf/text_format.cc#L1560
 	mset := false
-	if extendedType == "*proto2_bridge.MessageSet" && typeName[len(typeName)-1] == "message_set_extension" {
+	if extDesc.GetOptions().GetMessageSetWireFormat() && typeName[len(typeName)-1] == "message_set_extension" {
 		typeName = typeName[:len(typeName)-1]
 		mset = true
 	}
@@ -2868,3 +2915,14 @@
 	// tag numbers in EnumDescriptorProto
 	enumValuePath = 2 // value
 )
+
+var supportTypeAliases bool
+
+func init() {
+	for _, tag := range build.Default.ReleaseTags {
+		if tag == "go1.9" {
+			supportTypeAliases = true
+			return
+		}
+	}
+}
diff --git a/protoc-gen-go/generator/internal/remap/remap.go b/protoc-gen-go/generator/internal/remap/remap.go
new file mode 100644
index 0000000..a9b6103
--- /dev/null
+++ b/protoc-gen-go/generator/internal/remap/remap.go
@@ -0,0 +1,117 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2017 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/*
+Package remap handles tracking the locations of Go tokens in a source text
+across a rewrite by the Go formatter.
+*/
+package remap
+
+import (
+	"fmt"
+	"go/scanner"
+	"go/token"
+)
+
+// A Location represents a span of byte offsets in the source text.
+type Location struct {
+	Pos, End int // End is exclusive
+}
+
+// A Map represents a mapping between token locations in an input source text
+// and locations in the correspnding output text.
+type Map map[Location]Location
+
+// Find reports whether the specified span is recorded by m, and if so returns
+// the new location it was mapped to. If the input span was not found, the
+// returned location is the same as the input.
+func (m Map) Find(pos, end int) (Location, bool) {
+	key := Location{
+		Pos: pos,
+		End: end,
+	}
+	if loc, ok := m[key]; ok {
+		return loc, true
+	}
+	return key, false
+}
+
+func (m Map) add(opos, oend, npos, nend int) {
+	m[Location{Pos: opos, End: oend}] = Location{Pos: npos, End: nend}
+}
+
+// Compute constructs a location mapping from input to output.  An error is
+// reported if any of the tokens of output cannot be mapped.
+func Compute(input, output []byte) (Map, error) {
+	itok := tokenize(input)
+	otok := tokenize(output)
+	if len(itok) != len(otok) {
+		return nil, fmt.Errorf("wrong number of tokens, %d ≠ %d", len(itok), len(otok))
+	}
+	m := make(Map)
+	for i, ti := range itok {
+		to := otok[i]
+		if ti.Token != to.Token {
+			return nil, fmt.Errorf("token %d type mismatch: %s ≠ %s", i+1, ti, to)
+		}
+		m.add(ti.pos, ti.end, to.pos, to.end)
+	}
+	return m, nil
+}
+
+// tokinfo records the span and type of a source token.
+type tokinfo struct {
+	pos, end int
+	token.Token
+}
+
+func tokenize(src []byte) []tokinfo {
+	fs := token.NewFileSet()
+	var s scanner.Scanner
+	s.Init(fs.AddFile("src", fs.Base(), len(src)), src, nil, scanner.ScanComments)
+	var info []tokinfo
+	for {
+		pos, next, lit := s.Scan()
+		switch next {
+		case token.SEMICOLON:
+			continue
+		}
+		info = append(info, tokinfo{
+			pos:   int(pos - 1),
+			end:   int(pos + token.Pos(len(lit)) - 1),
+			Token: next,
+		})
+		if next == token.EOF {
+			break
+		}
+	}
+	return info
+}
diff --git a/protoc-gen-go/generator/internal/remap/remap_test.go b/protoc-gen-go/generator/internal/remap/remap_test.go
new file mode 100644
index 0000000..ccc7fca
--- /dev/null
+++ b/protoc-gen-go/generator/internal/remap/remap_test.go
@@ -0,0 +1,82 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2017 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package remap
+
+import (
+	"go/format"
+	"testing"
+)
+
+func TestErrors(t *testing.T) {
+	tests := []struct {
+		in, out string
+	}{
+		{"", "x"},
+		{"x", ""},
+		{"var x int = 5\n", "var x = 5\n"},
+		{"these are \"one\" thing", "those are 'another' thing"},
+	}
+	for _, test := range tests {
+		m, err := Compute([]byte(test.in), []byte(test.out))
+		if err != nil {
+			t.Logf("Got expected error: %v", err)
+			continue
+		}
+		t.Errorf("Compute(%q, %q): got %+v, wanted error", test.in, test.out, m)
+	}
+}
+
+func TestMatching(t *testing.T) {
+	// The input is a source text that will be rearranged by the formatter.
+	const input = `package foo
+var s int
+func main(){}
+`
+
+	output, err := format.Source([]byte(input))
+	if err != nil {
+		t.Fatalf("Formatting failed: %v", err)
+	}
+	m, err := Compute([]byte(input), output)
+	if err != nil {
+		t.Fatalf("Unexpected error: %v", err)
+	}
+
+	// Verify that the mapped locations have the same text.
+	for key, val := range m {
+		want := input[key.Pos:key.End]
+		got := string(output[val.Pos:val.End])
+		if got != want {
+			t.Errorf("Token at %d:%d: got %q, want %q", key.Pos, key.End, got, want)
+		}
+	}
+}
diff --git a/protoc-gen-go/generator/name_test.go b/protoc-gen-go/generator/name_test.go
index 76808f3..571147c 100644
--- a/protoc-gen-go/generator/name_test.go
+++ b/protoc-gen-go/generator/name_test.go
@@ -59,9 +59,10 @@
 
 func TestGoPackageOption(t *testing.T) {
 	tests := []struct {
-		in           string
-		impPath, pkg string
-		ok           bool
+		in      string
+		impPath GoImportPath
+		pkg     GoPackageName
+		ok      bool
 	}{
 		{"", "", "", false},
 		{"foo", "", "foo", true},
@@ -86,8 +87,8 @@
 
 func TestUnescape(t *testing.T) {
 	tests := []struct {
-		in   string
-		out  string
+		in  string
+		out string
 	}{
 		// successful cases, including all kinds of escapes
 		{"", ""},
diff --git a/protoc-gen-go/golden_test.go b/protoc-gen-go/golden_test.go
new file mode 100644
index 0000000..2630de6
--- /dev/null
+++ b/protoc-gen-go/golden_test.go
@@ -0,0 +1,422 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"go/build"
+	"go/parser"
+	"go/token"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+// Set --regenerate to regenerate the golden files.
+var regenerate = flag.Bool("regenerate", false, "regenerate golden files")
+
+// When the environment variable RUN_AS_PROTOC_GEN_GO is set, we skip running
+// tests and instead act as protoc-gen-go. This allows the test binary to
+// pass itself to protoc.
+func init() {
+	if os.Getenv("RUN_AS_PROTOC_GEN_GO") != "" {
+		main()
+		os.Exit(0)
+	}
+}
+
+func TestGolden(t *testing.T) {
+	workdir, err := ioutil.TempDir("", "proto-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(workdir)
+
+	// Find all the proto files we need to compile. We assume that each directory
+	// contains the files for a single package.
+	supportTypeAliases := hasReleaseTag("go1.9")
+	packages := map[string][]string{}
+	err = filepath.Walk("testdata", func(path string, info os.FileInfo, err error) error {
+		if filepath.Base(path) == "import_public" && !supportTypeAliases {
+			// Public imports require type alias support.
+			return filepath.SkipDir
+		}
+		if !strings.HasSuffix(path, ".proto") {
+			return nil
+		}
+		dir := filepath.Dir(path)
+		packages[dir] = append(packages[dir], path)
+		return nil
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Compile each package, using this binary as protoc-gen-go.
+	for _, sources := range packages {
+		args := []string{"-Itestdata", "--go_out=plugins=grpc,paths=source_relative:" + workdir}
+		args = append(args, sources...)
+		protoc(t, args)
+	}
+
+	// Compare each generated file to the golden version.
+	filepath.Walk(workdir, func(genPath string, info os.FileInfo, _ error) error {
+		if info.IsDir() {
+			return nil
+		}
+
+		// For each generated file, figure out the path to the corresponding
+		// golden file in the testdata directory.
+		relPath, err := filepath.Rel(workdir, genPath)
+		if err != nil {
+			t.Errorf("filepath.Rel(%q, %q): %v", workdir, genPath, err)
+			return nil
+		}
+		if filepath.SplitList(relPath)[0] == ".." {
+			t.Errorf("generated file %q is not relative to %q", genPath, workdir)
+		}
+		goldenPath := filepath.Join("testdata", relPath)
+
+		got, err := ioutil.ReadFile(genPath)
+		if err != nil {
+			t.Error(err)
+			return nil
+		}
+		if *regenerate {
+			// If --regenerate set, just rewrite the golden files.
+			err := ioutil.WriteFile(goldenPath, got, 0666)
+			if err != nil {
+				t.Error(err)
+			}
+			return nil
+		}
+
+		want, err := ioutil.ReadFile(goldenPath)
+		if err != nil {
+			t.Error(err)
+			return nil
+		}
+
+		want = fdescRE.ReplaceAll(want, nil)
+		got = fdescRE.ReplaceAll(got, nil)
+		if bytes.Equal(got, want) {
+			return nil
+		}
+
+		cmd := exec.Command("diff", "-u", goldenPath, genPath)
+		out, _ := cmd.CombinedOutput()
+		t.Errorf("golden file differs: %v\n%v", relPath, string(out))
+		return nil
+	})
+}
+
+var fdescRE = regexp.MustCompile(`(?ms)^var fileDescriptor.*}`)
+
+// Source files used by TestParameters.
+const (
+	aProto = `
+syntax = "proto3";
+package test.alpha;
+option go_package = "package/alpha";
+import "beta/b.proto";
+message M { test.beta.M field = 1; }`
+
+	bProto = `
+syntax = "proto3";
+package test.beta;
+// no go_package option
+message M {}`
+)
+
+func TestParameters(t *testing.T) {
+	for _, test := range []struct {
+		parameters   string
+		wantFiles    map[string]bool
+		wantImportsA map[string]bool
+		wantPackageA string
+		wantPackageB string
+	}{{
+		parameters: "",
+		wantFiles: map[string]bool{
+			"package/alpha/a.pb.go": true,
+			"beta/b.pb.go":          true,
+		},
+		wantPackageA: "alpha",
+		wantPackageB: "test_beta",
+		wantImportsA: map[string]bool{
+			"github.com/golang/protobuf/proto": true,
+			"beta": true,
+		},
+	}, {
+		parameters: "import_prefix=prefix",
+		wantFiles: map[string]bool{
+			"package/alpha/a.pb.go": true,
+			"beta/b.pb.go":          true,
+		},
+		wantPackageA: "alpha",
+		wantPackageB: "test_beta",
+		wantImportsA: map[string]bool{
+			// This really doesn't seem like useful behavior.
+			"prefixgithub.com/golang/protobuf/proto": true,
+			"prefixbeta":                             true,
+		},
+	}, {
+		// import_path only affects the 'package' line.
+		parameters:   "import_path=import/path/of/pkg",
+		wantPackageA: "alpha",
+		wantPackageB: "pkg",
+		wantFiles: map[string]bool{
+			"package/alpha/a.pb.go": true,
+			"beta/b.pb.go":          true,
+		},
+	}, {
+		parameters: "Mbeta/b.proto=package/gamma",
+		wantFiles: map[string]bool{
+			"package/alpha/a.pb.go": true,
+			"beta/b.pb.go":          true,
+		},
+		wantPackageA: "alpha",
+		wantPackageB: "test_beta",
+		wantImportsA: map[string]bool{
+			"github.com/golang/protobuf/proto": true,
+			// Rewritten by the M parameter.
+			"package/gamma": true,
+		},
+	}, {
+		parameters: "import_prefix=prefix,Mbeta/b.proto=package/gamma",
+		wantFiles: map[string]bool{
+			"package/alpha/a.pb.go": true,
+			"beta/b.pb.go":          true,
+		},
+		wantPackageA: "alpha",
+		wantPackageB: "test_beta",
+		wantImportsA: map[string]bool{
+			// import_prefix applies after M.
+			"prefixpackage/gamma": true,
+		},
+	}, {
+		parameters: "paths=source_relative",
+		wantFiles: map[string]bool{
+			"alpha/a.pb.go": true,
+			"beta/b.pb.go":  true,
+		},
+		wantPackageA: "alpha",
+		wantPackageB: "test_beta",
+	}, {
+		parameters: "paths=source_relative,import_prefix=prefix",
+		wantFiles: map[string]bool{
+			// import_prefix doesn't affect filenames.
+			"alpha/a.pb.go": true,
+			"beta/b.pb.go":  true,
+		},
+		wantPackageA: "alpha",
+		wantPackageB: "test_beta",
+	}} {
+		name := test.parameters
+		if name == "" {
+			name = "defaults"
+		}
+		// TODO: Switch to t.Run when we no longer support Go 1.6.
+		t.Logf("TEST: %v", name)
+		workdir, err := ioutil.TempDir("", "proto-test")
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer os.RemoveAll(workdir)
+
+		for _, dir := range []string{"alpha", "beta", "out"} {
+			if err := os.MkdirAll(filepath.Join(workdir, dir), 0777); err != nil {
+				t.Fatal(err)
+			}
+		}
+
+		if err := ioutil.WriteFile(filepath.Join(workdir, "alpha", "a.proto"), []byte(aProto), 0666); err != nil {
+			t.Fatal(err)
+		}
+
+		if err := ioutil.WriteFile(filepath.Join(workdir, "beta", "b.proto"), []byte(bProto), 0666); err != nil {
+			t.Fatal(err)
+		}
+
+		protoc(t, []string{
+			"-I" + workdir,
+			"--go_out=" + test.parameters + ":" + filepath.Join(workdir, "out"),
+			filepath.Join(workdir, "alpha", "a.proto"),
+		})
+		protoc(t, []string{
+			"-I" + workdir,
+			"--go_out=" + test.parameters + ":" + filepath.Join(workdir, "out"),
+			filepath.Join(workdir, "beta", "b.proto"),
+		})
+
+		contents := make(map[string]string)
+		gotFiles := make(map[string]bool)
+		outdir := filepath.Join(workdir, "out")
+		filepath.Walk(outdir, func(p string, info os.FileInfo, _ error) error {
+			if info.IsDir() {
+				return nil
+			}
+			base := filepath.Base(p)
+			if base == "a.pb.go" || base == "b.pb.go" {
+				b, err := ioutil.ReadFile(p)
+				if err != nil {
+					t.Fatal(err)
+				}
+				contents[base] = string(b)
+			}
+			relPath, _ := filepath.Rel(outdir, p)
+			gotFiles[relPath] = true
+			return nil
+		})
+		for got := range gotFiles {
+			if runtime.GOOS == "windows" {
+				got = filepath.ToSlash(got)
+			}
+			if !test.wantFiles[got] {
+				t.Errorf("unexpected output file: %v", got)
+			}
+		}
+		for want := range test.wantFiles {
+			if runtime.GOOS == "windows" {
+				want = filepath.FromSlash(want)
+			}
+			if !gotFiles[want] {
+				t.Errorf("missing output file:    %v", want)
+			}
+		}
+		gotPackageA, gotImports, err := parseFile(contents["a.pb.go"])
+		if err != nil {
+			t.Fatal(err)
+		}
+		gotPackageB, _, err := parseFile(contents["b.pb.go"])
+		if err != nil {
+			t.Fatal(err)
+		}
+		if got, want := gotPackageA, test.wantPackageA; want != got {
+			t.Errorf("output file a.pb.go is package %q, want %q", got, want)
+		}
+		if got, want := gotPackageB, test.wantPackageB; want != got {
+			t.Errorf("output file b.pb.go is package %q, want %q", got, want)
+		}
+		missingImport := false
+	WantImport:
+		for want := range test.wantImportsA {
+			for _, imp := range gotImports {
+				if `"`+want+`"` == imp {
+					continue WantImport
+				}
+			}
+			t.Errorf("output file a.pb.go does not contain expected import %q", want)
+			missingImport = true
+		}
+		if missingImport {
+			t.Error("got imports:")
+			for _, imp := range gotImports {
+				t.Errorf("  %v", imp)
+			}
+		}
+	}
+}
+
+func TestPackageComment(t *testing.T) {
+	workdir, err := ioutil.TempDir("", "proto-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(workdir)
+
+	var packageRE = regexp.MustCompile(`(?m)^package .*`)
+
+	for i, test := range []struct {
+		goPackageOption string
+		wantPackage     string
+	}{{
+		goPackageOption: ``,
+		wantPackage:     `package proto_package`,
+	}, {
+		goPackageOption: `option go_package = "go_package";`,
+		wantPackage:     `package go_package`,
+	}, {
+		goPackageOption: `option go_package = "import/path/of/go_package";`,
+		wantPackage:     `package go_package // import "import/path/of/go_package"`,
+	}, {
+		goPackageOption: `option go_package = "import/path/of/something;go_package";`,
+		wantPackage:     `package go_package // import "import/path/of/something"`,
+	}, {
+		goPackageOption: `option go_package = "import_path;go_package";`,
+		wantPackage:     `package go_package // import "import_path"`,
+	}} {
+		srcName := filepath.Join(workdir, fmt.Sprintf("%d.proto", i))
+		tgtName := filepath.Join(workdir, fmt.Sprintf("%d.pb.go", i))
+
+		buf := &bytes.Buffer{}
+		fmt.Fprintln(buf, `syntax = "proto3";`)
+		fmt.Fprintln(buf, `package proto_package;`)
+		fmt.Fprintln(buf, test.goPackageOption)
+		if err := ioutil.WriteFile(srcName, buf.Bytes(), 0666); err != nil {
+			t.Fatal(err)
+		}
+
+		protoc(t, []string{"-I" + workdir, "--go_out=paths=source_relative:" + workdir, srcName})
+
+		out, err := ioutil.ReadFile(tgtName)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		pkg := packageRE.Find(out)
+		if pkg == nil {
+			t.Errorf("generated .pb.go contains no package line\n\nsource:\n%v\n\noutput:\n%v", buf.String(), string(out))
+			continue
+		}
+
+		if got, want := string(pkg), test.wantPackage; got != want {
+			t.Errorf("unexpected package statement with go_package = %q\n got: %v\nwant: %v", test.goPackageOption, got, want)
+		}
+	}
+}
+
+// parseFile returns a file's package name and a list of all packages it imports.
+func parseFile(source string) (packageName string, imports []string, err error) {
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, "<source>", source, parser.ImportsOnly)
+	if err != nil {
+		return "", nil, err
+	}
+	for _, imp := range f.Imports {
+		imports = append(imports, imp.Path.Value)
+	}
+	return f.Name.Name, imports, nil
+}
+
+func protoc(t *testing.T, args []string) {
+	cmd := exec.Command("protoc", "--plugin=protoc-gen-go="+os.Args[0])
+	cmd.Args = append(cmd.Args, args...)
+	// We set the RUN_AS_PROTOC_GEN_GO environment variable to indicate that
+	// the subprocess should act as a proto compiler rather than a test.
+	cmd.Env = append(os.Environ(), "RUN_AS_PROTOC_GEN_GO=1")
+	out, err := cmd.CombinedOutput()
+	if len(out) > 0 || err != nil {
+		t.Log("RUNNING: ", strings.Join(cmd.Args, " "))
+	}
+	if len(out) > 0 {
+		t.Log(string(out))
+	}
+	if err != nil {
+		t.Fatalf("protoc: %v", err)
+	}
+}
+
+func hasReleaseTag(want string) bool {
+	for _, tag := range build.Default.ReleaseTags {
+		if tag == want {
+			return true
+		}
+	}
+	return false
+}
diff --git a/protoc-gen-go/grpc/grpc.go b/protoc-gen-go/grpc/grpc.go
index 2660e47..1723680 100644
--- a/protoc-gen-go/grpc/grpc.go
+++ b/protoc-gen-go/grpc/grpc.go
@@ -130,19 +130,23 @@
 		return
 	}
 	g.P("import (")
-	g.P(contextPkg, " ", strconv.Quote(path.Join(g.gen.ImportPrefix, contextPkgPath)))
-	g.P(grpcPkg, " ", strconv.Quote(path.Join(g.gen.ImportPrefix, grpcPkgPath)))
+	g.P(contextPkg, " ", generator.GoImportPath(path.Join(string(g.gen.ImportPrefix), contextPkgPath)))
+	g.P(grpcPkg, " ", generator.GoImportPath(path.Join(string(g.gen.ImportPrefix), grpcPkgPath)))
 	g.P(")")
 	g.P()
 }
 
 // reservedClientName records whether a client name is reserved on the client side.
 var reservedClientName = map[string]bool{
-// TODO: do we need any in gRPC?
+	// TODO: do we need any in gRPC?
 }
 
 func unexport(s string) string { return strings.ToLower(s[:1]) + s[1:] }
 
+// deprecationComment is the standard comment added to deprecated
+// messages, fields, enums, and enum values.
+var deprecationComment = "// Deprecated: Do not use."
+
 // generateService generates all the code for the named service.
 func (g *grpc) generateService(file *generator.FileDescriptor, service *pb.ServiceDescriptorProto, index int) {
 	path := fmt.Sprintf("6,%d", index) // 6 means service.
@@ -153,12 +157,16 @@
 		fullServName = pkg + "." + fullServName
 	}
 	servName := generator.CamelCase(origServName)
+	deprecated := service.GetOptions().GetDeprecated()
 
 	g.P()
 	g.P("// Client API for ", servName, " service")
 	g.P()
 
 	// Client interface.
+	if deprecated {
+		g.P(deprecationComment)
+	}
 	g.P("type ", servName, "Client interface {")
 	for i, method := range service.Method {
 		g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service.
@@ -174,6 +182,9 @@
 	g.P()
 
 	// NewClient factory.
+	if deprecated {
+		g.P(deprecationComment)
+	}
 	g.P("func New", servName, "Client (cc *", grpcPkg, ".ClientConn) ", servName, "Client {")
 	g.P("return &", unexport(servName), "Client{cc}")
 	g.P("}")
@@ -200,6 +211,9 @@
 	g.P()
 
 	// Server interface.
+	if deprecated {
+		g.P(deprecationComment)
+	}
 	serverType := servName + "Server"
 	g.P("type ", serverType, " interface {")
 	for i, method := range service.Method {
@@ -210,6 +224,9 @@
 	g.P()
 
 	// Server registration.
+	if deprecated {
+		g.P(deprecationComment)
+	}
 	g.P("func Register", servName, "Server(s *", grpcPkg, ".Server, srv ", serverType, ") {")
 	g.P("s.RegisterService(&", serviceDescVar, `, srv)`)
 	g.P("}")
@@ -283,6 +300,9 @@
 	inType := g.typeName(method.GetInputType())
 	outType := g.typeName(method.GetOutputType())
 
+	if method.GetOptions().GetDeprecated() {
+		g.P(deprecationComment)
+	}
 	g.P("func (c *", unexport(servName), "Client) ", g.generateClientSignature(servName, method), "{")
 	if !method.GetServerStreaming() && !method.GetClientStreaming() {
 		g.P("out := new(", outType, ")")
diff --git a/protoc-gen-go/plugin/Makefile b/protoc-gen-go/plugin/Makefile
deleted file mode 100644
index bc0463d..0000000
--- a/protoc-gen-go/plugin/Makefile
+++ /dev/null
@@ -1,45 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-# Not stored here, but plugin.proto is in https://github.com/google/protobuf/
-# at src/google/protobuf/compiler/plugin.proto
-# Also we need to fix an import.
-regenerate:
-	@echo WARNING! THIS RULE IS PROBABLY NOT RIGHT FOR YOUR INSTALLATION
-	cp $(HOME)/src/protobuf/include/google/protobuf/compiler/plugin.proto .
-	protoc --go_out=Mgoogle/protobuf/descriptor.proto=github.com/golang/protobuf/protoc-gen-go/descriptor:../../../../.. \
-		-I$(HOME)/src/protobuf/include $(HOME)/src/protobuf/include/google/protobuf/compiler/plugin.proto
-
-restore:
-	cp plugin.pb.golden plugin.pb.go
-
-preserve:
-	cp plugin.pb.go plugin.pb.golden
diff --git a/protoc-gen-go/plugin/plugin.pb.go b/protoc-gen-go/plugin/plugin.pb.go
index c608a24..61bfc10 100644
--- a/protoc-gen-go/plugin/plugin.pb.go
+++ b/protoc-gen-go/plugin/plugin.pb.go
@@ -37,14 +37,33 @@
 	Patch *int32 `protobuf:"varint,3,opt,name=patch" json:"patch,omitempty"`
 	// A suffix for alpha, beta or rc release, e.g., "alpha-1", "rc2". It should
 	// be empty for mainline stable releases.
-	Suffix           *string `protobuf:"bytes,4,opt,name=suffix" json:"suffix,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+	Suffix               *string  `protobuf:"bytes,4,opt,name=suffix" json:"suffix,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *Version) Reset()                    { *m = Version{} }
 func (m *Version) String() string            { return proto.CompactTextString(m) }
 func (*Version) ProtoMessage()               {}
 func (*Version) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+func (m *Version) Unmarshal(b []byte) error {
+	return xxx_messageInfo_Version.Unmarshal(m, b)
+}
+func (m *Version) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Version.Marshal(b, m, deterministic)
+}
+func (dst *Version) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Version.Merge(dst, src)
+}
+func (m *Version) XXX_Size() int {
+	return xxx_messageInfo_Version.Size(m)
+}
+func (m *Version) XXX_DiscardUnknown() {
+	xxx_messageInfo_Version.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Version proto.InternalMessageInfo
 
 func (m *Version) GetMajor() int32 {
 	if m != nil && m.Major != nil {
@@ -98,14 +117,33 @@
 	// fully qualified.
 	ProtoFile []*google_protobuf.FileDescriptorProto `protobuf:"bytes,15,rep,name=proto_file,json=protoFile" json:"proto_file,omitempty"`
 	// The version number of protocol compiler.
-	CompilerVersion  *Version `protobuf:"bytes,3,opt,name=compiler_version,json=compilerVersion" json:"compiler_version,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
+	CompilerVersion      *Version `protobuf:"bytes,3,opt,name=compiler_version,json=compilerVersion" json:"compiler_version,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *CodeGeneratorRequest) Reset()                    { *m = CodeGeneratorRequest{} }
 func (m *CodeGeneratorRequest) String() string            { return proto.CompactTextString(m) }
 func (*CodeGeneratorRequest) ProtoMessage()               {}
 func (*CodeGeneratorRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+func (m *CodeGeneratorRequest) Unmarshal(b []byte) error {
+	return xxx_messageInfo_CodeGeneratorRequest.Unmarshal(m, b)
+}
+func (m *CodeGeneratorRequest) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CodeGeneratorRequest.Marshal(b, m, deterministic)
+}
+func (dst *CodeGeneratorRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CodeGeneratorRequest.Merge(dst, src)
+}
+func (m *CodeGeneratorRequest) XXX_Size() int {
+	return xxx_messageInfo_CodeGeneratorRequest.Size(m)
+}
+func (m *CodeGeneratorRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_CodeGeneratorRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CodeGeneratorRequest proto.InternalMessageInfo
 
 func (m *CodeGeneratorRequest) GetFileToGenerate() []string {
 	if m != nil {
@@ -145,15 +183,34 @@
 	// problem in protoc itself -- such as the input CodeGeneratorRequest being
 	// unparseable -- should be reported by writing a message to stderr and
 	// exiting with a non-zero status code.
-	Error            *string                       `protobuf:"bytes,1,opt,name=error" json:"error,omitempty"`
-	File             []*CodeGeneratorResponse_File `protobuf:"bytes,15,rep,name=file" json:"file,omitempty"`
-	XXX_unrecognized []byte                        `json:"-"`
+	Error                *string                       `protobuf:"bytes,1,opt,name=error" json:"error,omitempty"`
+	File                 []*CodeGeneratorResponse_File `protobuf:"bytes,15,rep,name=file" json:"file,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                      `json:"-"`
+	XXX_unrecognized     []byte                        `json:"-"`
+	XXX_sizecache        int32                         `json:"-"`
 }
 
 func (m *CodeGeneratorResponse) Reset()                    { *m = CodeGeneratorResponse{} }
 func (m *CodeGeneratorResponse) String() string            { return proto.CompactTextString(m) }
 func (*CodeGeneratorResponse) ProtoMessage()               {}
 func (*CodeGeneratorResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+func (m *CodeGeneratorResponse) Unmarshal(b []byte) error {
+	return xxx_messageInfo_CodeGeneratorResponse.Unmarshal(m, b)
+}
+func (m *CodeGeneratorResponse) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CodeGeneratorResponse.Marshal(b, m, deterministic)
+}
+func (dst *CodeGeneratorResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CodeGeneratorResponse.Merge(dst, src)
+}
+func (m *CodeGeneratorResponse) XXX_Size() int {
+	return xxx_messageInfo_CodeGeneratorResponse.Size(m)
+}
+func (m *CodeGeneratorResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_CodeGeneratorResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CodeGeneratorResponse proto.InternalMessageInfo
 
 func (m *CodeGeneratorResponse) GetError() string {
 	if m != nil && m.Error != nil {
@@ -222,14 +279,33 @@
 	// If |insertion_point| is present, |name| must also be present.
 	InsertionPoint *string `protobuf:"bytes,2,opt,name=insertion_point,json=insertionPoint" json:"insertion_point,omitempty"`
 	// The file contents.
-	Content          *string `protobuf:"bytes,15,opt,name=content" json:"content,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+	Content              *string  `protobuf:"bytes,15,opt,name=content" json:"content,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *CodeGeneratorResponse_File) Reset()                    { *m = CodeGeneratorResponse_File{} }
 func (m *CodeGeneratorResponse_File) String() string            { return proto.CompactTextString(m) }
 func (*CodeGeneratorResponse_File) ProtoMessage()               {}
 func (*CodeGeneratorResponse_File) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 0} }
+func (m *CodeGeneratorResponse_File) Unmarshal(b []byte) error {
+	return xxx_messageInfo_CodeGeneratorResponse_File.Unmarshal(m, b)
+}
+func (m *CodeGeneratorResponse_File) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CodeGeneratorResponse_File.Marshal(b, m, deterministic)
+}
+func (dst *CodeGeneratorResponse_File) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CodeGeneratorResponse_File.Merge(dst, src)
+}
+func (m *CodeGeneratorResponse_File) XXX_Size() int {
+	return xxx_messageInfo_CodeGeneratorResponse_File.Size(m)
+}
+func (m *CodeGeneratorResponse_File) XXX_DiscardUnknown() {
+	xxx_messageInfo_CodeGeneratorResponse_File.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CodeGeneratorResponse_File proto.InternalMessageInfo
 
 func (m *CodeGeneratorResponse_File) GetName() string {
 	if m != nil && m.Name != nil {
diff --git a/protoc-gen-go/testdata/Makefile b/protoc-gen-go/testdata/Makefile
deleted file mode 100644
index a0bf9fe..0000000
--- a/protoc-gen-go/testdata/Makefile
+++ /dev/null
@@ -1,73 +0,0 @@
-# Go support for Protocol Buffers - Google's data interchange format
-#
-# Copyright 2010 The Go Authors.  All rights reserved.
-# https://github.com/golang/protobuf
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-all:
-	@echo run make test
-
-include ../../Make.protobuf
-
-test:	golden testbuild
-
-#test:	golden testbuild extension_test
-#	./extension_test
-#	@echo PASS
-
-my_test/test.pb.go: my_test/test.proto
-	protoc --go_out=Mmulti/multi1.proto=github.com/golang/protobuf/protoc-gen-go/testdata/multi:. $<
-
-golden:
-	make -B my_test/test.pb.go
-	sed -i -e '/return.*fileDescriptor/d' my_test/test.pb.go
-	sed -i -e '/^var fileDescriptor/,/^}/d' my_test/test.pb.go
-	sed -i -e '/proto.RegisterFile.*fileDescriptor/d' my_test/test.pb.go
-	gofmt -w my_test/test.pb.go
-	diff -w my_test/test.pb.go my_test/test.pb.go.golden
-
-nuke:	clean
-
-testbuild:	regenerate
-	go test
-
-regenerate:
-	# Invoke protoc once to generate three independent .pb.go files in the same package.
-	protoc --go_out=. multi/multi1.proto multi/multi2.proto multi/multi3.proto
-
-#extension_test:	extension_test.$O
-#	$(LD) -L. -o $@ $<
-
-#multi.a: multi3.pb.$O multi2.pb.$O multi1.pb.$O
-#	rm -f multi.a
-#	$(QUOTED_GOBIN)/gopack grc $@ $<
-
-#test.pb.go:	imp.pb.go
-#multi1.pb.go:	multi2.pb.go multi3.pb.go
-#main.$O: imp.pb.$O test.pb.$O multi.a
-#extension_test.$O: extension_base.pb.$O extension_extra.pb.$O extension_user.pb.$O
diff --git a/protoc-gen-go/testdata/deprecated/deprecated.pb.go b/protoc-gen-go/testdata/deprecated/deprecated.pb.go
new file mode 100644
index 0000000..6ebae9d
--- /dev/null
+++ b/protoc-gen-go/testdata/deprecated/deprecated.pb.go
@@ -0,0 +1,232 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// deprecated/deprecated.proto is a deprecated file.
+
+package deprecated // import "github.com/golang/protobuf/protoc-gen-go/testdata/deprecated"
+
+/*
+package deprecated contains only deprecated messages and services.
+*/
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// DeprecatedEnum contains deprecated values.
+type DeprecatedEnum int32 // Deprecated: Do not use.
+const (
+	// DEPRECATED is the iota value of this enum.
+	DeprecatedEnum_DEPRECATED DeprecatedEnum = 0 // Deprecated: Do not use.
+)
+
+var DeprecatedEnum_name = map[int32]string{
+	0: "DEPRECATED",
+}
+var DeprecatedEnum_value = map[string]int32{
+	"DEPRECATED": 0,
+}
+
+func (x DeprecatedEnum) String() string {
+	return proto.EnumName(DeprecatedEnum_name, int32(x))
+}
+func (DeprecatedEnum) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_deprecated_9e1889ba21817fad, []int{0}
+}
+
+// DeprecatedRequest is a request to DeprecatedCall.
+//
+// Deprecated: Do not use.
+type DeprecatedRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *DeprecatedRequest) Reset()         { *m = DeprecatedRequest{} }
+func (m *DeprecatedRequest) String() string { return proto.CompactTextString(m) }
+func (*DeprecatedRequest) ProtoMessage()    {}
+func (*DeprecatedRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_deprecated_9e1889ba21817fad, []int{0}
+}
+func (m *DeprecatedRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DeprecatedRequest.Unmarshal(m, b)
+}
+func (m *DeprecatedRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DeprecatedRequest.Marshal(b, m, deterministic)
+}
+func (dst *DeprecatedRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DeprecatedRequest.Merge(dst, src)
+}
+func (m *DeprecatedRequest) XXX_Size() int {
+	return xxx_messageInfo_DeprecatedRequest.Size(m)
+}
+func (m *DeprecatedRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_DeprecatedRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DeprecatedRequest proto.InternalMessageInfo
+
+// Deprecated: Do not use.
+type DeprecatedResponse struct {
+	// DeprecatedField contains a DeprecatedEnum.
+	DeprecatedField      DeprecatedEnum `protobuf:"varint,1,opt,name=deprecated_field,json=deprecatedField,enum=deprecated.DeprecatedEnum" json:"deprecated_field,omitempty"` // Deprecated: Do not use.
+	XXX_NoUnkeyedLiteral struct{}       `json:"-"`
+	XXX_unrecognized     []byte         `json:"-"`
+	XXX_sizecache        int32          `json:"-"`
+}
+
+func (m *DeprecatedResponse) Reset()         { *m = DeprecatedResponse{} }
+func (m *DeprecatedResponse) String() string { return proto.CompactTextString(m) }
+func (*DeprecatedResponse) ProtoMessage()    {}
+func (*DeprecatedResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_deprecated_9e1889ba21817fad, []int{1}
+}
+func (m *DeprecatedResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DeprecatedResponse.Unmarshal(m, b)
+}
+func (m *DeprecatedResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DeprecatedResponse.Marshal(b, m, deterministic)
+}
+func (dst *DeprecatedResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DeprecatedResponse.Merge(dst, src)
+}
+func (m *DeprecatedResponse) XXX_Size() int {
+	return xxx_messageInfo_DeprecatedResponse.Size(m)
+}
+func (m *DeprecatedResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_DeprecatedResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DeprecatedResponse proto.InternalMessageInfo
+
+// Deprecated: Do not use.
+func (m *DeprecatedResponse) GetDeprecatedField() DeprecatedEnum {
+	if m != nil {
+		return m.DeprecatedField
+	}
+	return DeprecatedEnum_DEPRECATED
+}
+
+func init() {
+	proto.RegisterType((*DeprecatedRequest)(nil), "deprecated.DeprecatedRequest")
+	proto.RegisterType((*DeprecatedResponse)(nil), "deprecated.DeprecatedResponse")
+	proto.RegisterEnum("deprecated.DeprecatedEnum", DeprecatedEnum_name, DeprecatedEnum_value)
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for DeprecatedService service
+
+// Deprecated: Do not use.
+type DeprecatedServiceClient interface {
+	// DeprecatedCall takes a DeprecatedRequest and returns a DeprecatedResponse.
+	DeprecatedCall(ctx context.Context, in *DeprecatedRequest, opts ...grpc.CallOption) (*DeprecatedResponse, error)
+}
+
+type deprecatedServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+// Deprecated: Do not use.
+func NewDeprecatedServiceClient(cc *grpc.ClientConn) DeprecatedServiceClient {
+	return &deprecatedServiceClient{cc}
+}
+
+// Deprecated: Do not use.
+func (c *deprecatedServiceClient) DeprecatedCall(ctx context.Context, in *DeprecatedRequest, opts ...grpc.CallOption) (*DeprecatedResponse, error) {
+	out := new(DeprecatedResponse)
+	err := grpc.Invoke(ctx, "/deprecated.DeprecatedService/DeprecatedCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for DeprecatedService service
+
+// Deprecated: Do not use.
+type DeprecatedServiceServer interface {
+	// DeprecatedCall takes a DeprecatedRequest and returns a DeprecatedResponse.
+	DeprecatedCall(context.Context, *DeprecatedRequest) (*DeprecatedResponse, error)
+}
+
+// Deprecated: Do not use.
+func RegisterDeprecatedServiceServer(s *grpc.Server, srv DeprecatedServiceServer) {
+	s.RegisterService(&_DeprecatedService_serviceDesc, srv)
+}
+
+func _DeprecatedService_DeprecatedCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DeprecatedRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(DeprecatedServiceServer).DeprecatedCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/deprecated.DeprecatedService/DeprecatedCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(DeprecatedServiceServer).DeprecatedCall(ctx, req.(*DeprecatedRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _DeprecatedService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "deprecated.DeprecatedService",
+	HandlerType: (*DeprecatedServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "DeprecatedCall",
+			Handler:    _DeprecatedService_DeprecatedCall_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "deprecated/deprecated.proto",
+}
+
+func init() {
+	proto.RegisterFile("deprecated/deprecated.proto", fileDescriptor_deprecated_9e1889ba21817fad)
+}
+
+var fileDescriptor_deprecated_9e1889ba21817fad = []byte{
+	// 248 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4e, 0x49, 0x2d, 0x28,
+	0x4a, 0x4d, 0x4e, 0x2c, 0x49, 0x4d, 0xd1, 0x47, 0x30, 0xf5, 0x0a, 0x8a, 0xf2, 0x4b, 0xf2, 0x85,
+	0xb8, 0x10, 0x22, 0x4a, 0xe2, 0x5c, 0x82, 0x2e, 0x70, 0x5e, 0x50, 0x6a, 0x61, 0x69, 0x6a, 0x71,
+	0x89, 0x15, 0x93, 0x04, 0xa3, 0x52, 0x32, 0x97, 0x10, 0xb2, 0x44, 0x71, 0x41, 0x7e, 0x5e, 0x71,
+	0xaa, 0x90, 0x27, 0x97, 0x00, 0x42, 0x73, 0x7c, 0x5a, 0x66, 0x6a, 0x4e, 0x8a, 0x04, 0xa3, 0x02,
+	0xa3, 0x06, 0x9f, 0x91, 0x94, 0x1e, 0x92, 0x3d, 0x08, 0x9d, 0xae, 0x79, 0xa5, 0xb9, 0x4e, 0x4c,
+	0x12, 0x8c, 0x41, 0xfc, 0x08, 0x69, 0x37, 0x90, 0x36, 0x90, 0x25, 0x5a, 0x1a, 0x5c, 0x7c, 0xa8,
+	0x4a, 0x85, 0x84, 0xb8, 0xb8, 0x5c, 0x5c, 0x03, 0x82, 0x5c, 0x9d, 0x1d, 0x43, 0x5c, 0x5d, 0x04,
+	0x18, 0xa4, 0x98, 0x38, 0x18, 0xa5, 0x98, 0x24, 0x18, 0x8d, 0xf2, 0x90, 0xdd, 0x19, 0x9c, 0x5a,
+	0x54, 0x96, 0x99, 0x9c, 0x2a, 0x14, 0x82, 0xac, 0xdd, 0x39, 0x31, 0x27, 0x47, 0x48, 0x16, 0xbb,
+	0x2b, 0xa0, 0x1e, 0x93, 0x92, 0xc3, 0x25, 0x0d, 0xf1, 0x9e, 0x12, 0x73, 0x07, 0x13, 0xa3, 0x14,
+	0x88, 0x70, 0x72, 0x8c, 0xb2, 0x49, 0xcf, 0x2c, 0xc9, 0x28, 0x4d, 0xd2, 0x4b, 0xce, 0xcf, 0xd5,
+	0x4f, 0xcf, 0xcf, 0x49, 0xcc, 0x4b, 0xd7, 0x07, 0x07, 0x5f, 0x52, 0x69, 0x1a, 0x84, 0x91, 0xac,
+	0x9b, 0x9e, 0x9a, 0xa7, 0x9b, 0x9e, 0xaf, 0x5f, 0x92, 0x5a, 0x5c, 0x92, 0x92, 0x58, 0x92, 0x88,
+	0x14, 0xd2, 0x3b, 0x18, 0x19, 0x93, 0xd8, 0xc0, 0xaa, 0x8c, 0x01, 0x01, 0x00, 0x00, 0xff, 0xff,
+	0x0e, 0xf5, 0x6c, 0x87, 0x8c, 0x01, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/deprecated/deprecated.proto b/protoc-gen-go/testdata/deprecated/deprecated.proto
new file mode 100644
index 0000000..b314166
--- /dev/null
+++ b/protoc-gen-go/testdata/deprecated/deprecated.proto
@@ -0,0 +1,69 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2018 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+// package deprecated contains only deprecated messages and services.
+package deprecated;
+
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/deprecated";
+
+option deprecated = true; // file-level deprecation
+
+// DeprecatedRequest is a request to DeprecatedCall.
+message DeprecatedRequest {
+  option deprecated = true;
+}
+
+message DeprecatedResponse {
+  // comment for DeprecatedResponse is omitted to guarantee deprecation
+  // message doesn't append unnecessary comments.
+  option deprecated = true;
+  // DeprecatedField contains a DeprecatedEnum.
+  DeprecatedEnum deprecated_field = 1 [deprecated=true];
+}
+
+// DeprecatedEnum contains deprecated values.
+enum DeprecatedEnum {
+  option deprecated = true;
+  // DEPRECATED is the iota value of this enum.
+  DEPRECATED = 0 [deprecated=true];
+}
+
+// DeprecatedService is for making DeprecatedCalls
+service DeprecatedService {
+  option deprecated = true;
+
+  // DeprecatedCall takes a DeprecatedRequest and returns a DeprecatedResponse.
+  rpc DeprecatedCall(DeprecatedRequest) returns (DeprecatedResponse) {
+    option deprecated = true;
+  }
+}
diff --git a/protoc-gen-go/testdata/extension_base/extension_base.pb.go b/protoc-gen-go/testdata/extension_base/extension_base.pb.go
new file mode 100644
index 0000000..a08e8ed
--- /dev/null
+++ b/protoc-gen-go/testdata/extension_base/extension_base.pb.go
@@ -0,0 +1,139 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: extension_base/extension_base.proto
+
+package extension_base // import "github.com/golang/protobuf/protoc-gen-go/testdata/extension_base"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type BaseMessage struct {
+	Height                       *int32   `protobuf:"varint,1,opt,name=height" json:"height,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
+}
+
+func (m *BaseMessage) Reset()         { *m = BaseMessage{} }
+func (m *BaseMessage) String() string { return proto.CompactTextString(m) }
+func (*BaseMessage) ProtoMessage()    {}
+func (*BaseMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_base_41d3c712c9fc37fc, []int{0}
+}
+
+var extRange_BaseMessage = []proto.ExtensionRange{
+	{Start: 4, End: 9},
+	{Start: 16, End: 536870911},
+}
+
+func (*BaseMessage) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_BaseMessage
+}
+func (m *BaseMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BaseMessage.Unmarshal(m, b)
+}
+func (m *BaseMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BaseMessage.Marshal(b, m, deterministic)
+}
+func (dst *BaseMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BaseMessage.Merge(dst, src)
+}
+func (m *BaseMessage) XXX_Size() int {
+	return xxx_messageInfo_BaseMessage.Size(m)
+}
+func (m *BaseMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_BaseMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BaseMessage proto.InternalMessageInfo
+
+func (m *BaseMessage) GetHeight() int32 {
+	if m != nil && m.Height != nil {
+		return *m.Height
+	}
+	return 0
+}
+
+// Another message that may be extended, using message_set_wire_format.
+type OldStyleMessage struct {
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
+	proto.XXX_InternalExtensions `protobuf_messageset:"1" json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
+}
+
+func (m *OldStyleMessage) Reset()         { *m = OldStyleMessage{} }
+func (m *OldStyleMessage) String() string { return proto.CompactTextString(m) }
+func (*OldStyleMessage) ProtoMessage()    {}
+func (*OldStyleMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_base_41d3c712c9fc37fc, []int{1}
+}
+
+func (m *OldStyleMessage) MarshalJSON() ([]byte, error) {
+	return proto.MarshalMessageSetJSON(&m.XXX_InternalExtensions)
+}
+func (m *OldStyleMessage) UnmarshalJSON(buf []byte) error {
+	return proto.UnmarshalMessageSetJSON(buf, &m.XXX_InternalExtensions)
+}
+
+var extRange_OldStyleMessage = []proto.ExtensionRange{
+	{Start: 100, End: 2147483646},
+}
+
+func (*OldStyleMessage) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_OldStyleMessage
+}
+func (m *OldStyleMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OldStyleMessage.Unmarshal(m, b)
+}
+func (m *OldStyleMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OldStyleMessage.Marshal(b, m, deterministic)
+}
+func (dst *OldStyleMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OldStyleMessage.Merge(dst, src)
+}
+func (m *OldStyleMessage) XXX_Size() int {
+	return xxx_messageInfo_OldStyleMessage.Size(m)
+}
+func (m *OldStyleMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_OldStyleMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OldStyleMessage proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*BaseMessage)(nil), "extension_base.BaseMessage")
+	proto.RegisterType((*OldStyleMessage)(nil), "extension_base.OldStyleMessage")
+}
+
+func init() {
+	proto.RegisterFile("extension_base/extension_base.proto", fileDescriptor_extension_base_41d3c712c9fc37fc)
+}
+
+var fileDescriptor_extension_base_41d3c712c9fc37fc = []byte{
+	// 179 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x52, 0x4e, 0xad, 0x28, 0x49,
+	0xcd, 0x2b, 0xce, 0xcc, 0xcf, 0x8b, 0x4f, 0x4a, 0x2c, 0x4e, 0xd5, 0x47, 0xe5, 0xea, 0x15, 0x14,
+	0xe5, 0x97, 0xe4, 0x0b, 0xf1, 0xa1, 0x8a, 0x2a, 0x99, 0x72, 0x71, 0x3b, 0x25, 0x16, 0xa7, 0xfa,
+	0xa6, 0x16, 0x17, 0x27, 0xa6, 0xa7, 0x0a, 0x89, 0x71, 0xb1, 0x65, 0xa4, 0x66, 0xa6, 0x67, 0x94,
+	0x48, 0x30, 0x2a, 0x30, 0x6a, 0xb0, 0x06, 0x41, 0x79, 0x5a, 0x2c, 0x1c, 0x2c, 0x02, 0x5c, 0x5a,
+	0x1c, 0x1c, 0x02, 0x02, 0x0d, 0x0d, 0x0d, 0x0d, 0x4c, 0x4a, 0xf2, 0x5c, 0xfc, 0xfe, 0x39, 0x29,
+	0xc1, 0x25, 0x95, 0x39, 0x30, 0xad, 0x5a, 0x1c, 0x1c, 0x29, 0x02, 0xff, 0xff, 0xff, 0xff, 0xcf,
+	0x6e, 0xc5, 0xc4, 0xc1, 0xe8, 0xe4, 0x14, 0xe5, 0x90, 0x9e, 0x59, 0x92, 0x51, 0x9a, 0xa4, 0x97,
+	0x9c, 0x9f, 0xab, 0x9f, 0x9e, 0x9f, 0x93, 0x98, 0x97, 0xae, 0x0f, 0x76, 0x42, 0x52, 0x69, 0x1a,
+	0x84, 0x91, 0xac, 0x9b, 0x9e, 0x9a, 0xa7, 0x9b, 0x9e, 0xaf, 0x5f, 0x92, 0x5a, 0x5c, 0x92, 0x92,
+	0x58, 0x92, 0x88, 0xe6, 0x62, 0x40, 0x00, 0x00, 0x00, 0xff, 0xff, 0x7a, 0x7f, 0xb7, 0x2a, 0xd1,
+	0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/extension_base.proto b/protoc-gen-go/testdata/extension_base/extension_base.proto
similarity index 95%
rename from protoc-gen-go/testdata/extension_base.proto
rename to protoc-gen-go/testdata/extension_base/extension_base.proto
index 94acfc1..0ba74de 100644
--- a/protoc-gen-go/testdata/extension_base.proto
+++ b/protoc-gen-go/testdata/extension_base/extension_base.proto
@@ -33,6 +33,8 @@
 
 package extension_base;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/extension_base";
+
 message BaseMessage {
   optional int32 height = 1;
   extensions 4 to 9;
diff --git a/protoc-gen-go/testdata/extension_extra/extension_extra.pb.go b/protoc-gen-go/testdata/extension_extra/extension_extra.pb.go
new file mode 100644
index 0000000..b373216
--- /dev/null
+++ b/protoc-gen-go/testdata/extension_extra/extension_extra.pb.go
@@ -0,0 +1,78 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: extension_extra/extension_extra.proto
+
+package extension_extra // import "github.com/golang/protobuf/protoc-gen-go/testdata/extension_extra"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type ExtraMessage struct {
+	Width                *int32   `protobuf:"varint,1,opt,name=width" json:"width,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ExtraMessage) Reset()         { *m = ExtraMessage{} }
+func (m *ExtraMessage) String() string { return proto.CompactTextString(m) }
+func (*ExtraMessage) ProtoMessage()    {}
+func (*ExtraMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_extra_83adf2410f49f816, []int{0}
+}
+func (m *ExtraMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ExtraMessage.Unmarshal(m, b)
+}
+func (m *ExtraMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ExtraMessage.Marshal(b, m, deterministic)
+}
+func (dst *ExtraMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ExtraMessage.Merge(dst, src)
+}
+func (m *ExtraMessage) XXX_Size() int {
+	return xxx_messageInfo_ExtraMessage.Size(m)
+}
+func (m *ExtraMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_ExtraMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ExtraMessage proto.InternalMessageInfo
+
+func (m *ExtraMessage) GetWidth() int32 {
+	if m != nil && m.Width != nil {
+		return *m.Width
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*ExtraMessage)(nil), "extension_extra.ExtraMessage")
+}
+
+func init() {
+	proto.RegisterFile("extension_extra/extension_extra.proto", fileDescriptor_extension_extra_83adf2410f49f816)
+}
+
+var fileDescriptor_extension_extra_83adf2410f49f816 = []byte{
+	// 133 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x52, 0x4d, 0xad, 0x28, 0x49,
+	0xcd, 0x2b, 0xce, 0xcc, 0xcf, 0x8b, 0x4f, 0xad, 0x28, 0x29, 0x4a, 0xd4, 0x47, 0xe3, 0xeb, 0x15,
+	0x14, 0xe5, 0x97, 0xe4, 0x0b, 0xf1, 0xa3, 0x09, 0x2b, 0xa9, 0x70, 0xf1, 0xb8, 0x82, 0x18, 0xbe,
+	0xa9, 0xc5, 0xc5, 0x89, 0xe9, 0xa9, 0x42, 0x22, 0x5c, 0xac, 0xe5, 0x99, 0x29, 0x25, 0x19, 0x12,
+	0x8c, 0x0a, 0x8c, 0x1a, 0xac, 0x41, 0x10, 0x8e, 0x93, 0x73, 0x94, 0x63, 0x7a, 0x66, 0x49, 0x46,
+	0x69, 0x92, 0x5e, 0x72, 0x7e, 0xae, 0x7e, 0x7a, 0x7e, 0x4e, 0x62, 0x5e, 0xba, 0x3e, 0xd8, 0xc4,
+	0xa4, 0xd2, 0x34, 0x08, 0x23, 0x59, 0x37, 0x3d, 0x35, 0x4f, 0x37, 0x3d, 0x5f, 0xbf, 0x24, 0xb5,
+	0xb8, 0x24, 0x25, 0xb1, 0x04, 0xc3, 0x05, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0xf1, 0xec, 0xe3,
+	0xb7, 0xa3, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/extension_extra.proto b/protoc-gen-go/testdata/extension_extra/extension_extra.proto
similarity index 94%
rename from protoc-gen-go/testdata/extension_extra.proto
rename to protoc-gen-go/testdata/extension_extra/extension_extra.proto
index fca7f60..1dd03e7 100644
--- a/protoc-gen-go/testdata/extension_extra.proto
+++ b/protoc-gen-go/testdata/extension_extra/extension_extra.proto
@@ -33,6 +33,8 @@
 
 package extension_extra;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/extension_extra";
+
 message ExtraMessage {
   optional int32 width = 1;
 }
diff --git a/protoc-gen-go/testdata/extension_test.go b/protoc-gen-go/testdata/extension_test.go
index 86e9c11..0524729 100644
--- a/protoc-gen-go/testdata/extension_test.go
+++ b/protoc-gen-go/testdata/extension_test.go
@@ -33,16 +33,14 @@
 
 package testdata
 
-/*
-
 import (
 	"bytes"
 	"regexp"
 	"testing"
 
 	"github.com/golang/protobuf/proto"
-	base "extension_base.pb"
-	user "extension_user.pb"
+	base "github.com/golang/protobuf/protoc-gen-go/testdata/extension_base"
+	user "github.com/golang/protobuf/protoc-gen-go/testdata/extension_user"
 )
 
 func TestSingleFieldExtension(t *testing.T) {
@@ -206,5 +204,3 @@
 		[]testing.InternalBenchmark{},
 		[]testing.InternalExample{})
 }
-
-*/
diff --git a/protoc-gen-go/testdata/extension_user/extension_user.pb.go b/protoc-gen-go/testdata/extension_user/extension_user.pb.go
new file mode 100644
index 0000000..c718792
--- /dev/null
+++ b/protoc-gen-go/testdata/extension_user/extension_user.pb.go
@@ -0,0 +1,401 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: extension_user/extension_user.proto
+
+package extension_user // import "github.com/golang/protobuf/protoc-gen-go/testdata/extension_user"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import extension_base "github.com/golang/protobuf/protoc-gen-go/testdata/extension_base"
+import extension_extra "github.com/golang/protobuf/protoc-gen-go/testdata/extension_extra"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type UserMessage struct {
+	Name                 *string  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Rank                 *string  `protobuf:"bytes,2,opt,name=rank" json:"rank,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *UserMessage) Reset()         { *m = UserMessage{} }
+func (m *UserMessage) String() string { return proto.CompactTextString(m) }
+func (*UserMessage) ProtoMessage()    {}
+func (*UserMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_user_af41b5e0bdfb7846, []int{0}
+}
+func (m *UserMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_UserMessage.Unmarshal(m, b)
+}
+func (m *UserMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_UserMessage.Marshal(b, m, deterministic)
+}
+func (dst *UserMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_UserMessage.Merge(dst, src)
+}
+func (m *UserMessage) XXX_Size() int {
+	return xxx_messageInfo_UserMessage.Size(m)
+}
+func (m *UserMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_UserMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_UserMessage proto.InternalMessageInfo
+
+func (m *UserMessage) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *UserMessage) GetRank() string {
+	if m != nil && m.Rank != nil {
+		return *m.Rank
+	}
+	return ""
+}
+
+// Extend inside the scope of another type
+type LoudMessage struct {
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
+}
+
+func (m *LoudMessage) Reset()         { *m = LoudMessage{} }
+func (m *LoudMessage) String() string { return proto.CompactTextString(m) }
+func (*LoudMessage) ProtoMessage()    {}
+func (*LoudMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_user_af41b5e0bdfb7846, []int{1}
+}
+
+var extRange_LoudMessage = []proto.ExtensionRange{
+	{Start: 100, End: 536870911},
+}
+
+func (*LoudMessage) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_LoudMessage
+}
+func (m *LoudMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LoudMessage.Unmarshal(m, b)
+}
+func (m *LoudMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LoudMessage.Marshal(b, m, deterministic)
+}
+func (dst *LoudMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LoudMessage.Merge(dst, src)
+}
+func (m *LoudMessage) XXX_Size() int {
+	return xxx_messageInfo_LoudMessage.Size(m)
+}
+func (m *LoudMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_LoudMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LoudMessage proto.InternalMessageInfo
+
+var E_LoudMessage_Volume = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.BaseMessage)(nil),
+	ExtensionType: (*uint32)(nil),
+	Field:         8,
+	Name:          "extension_user.LoudMessage.volume",
+	Tag:           "varint,8,opt,name=volume",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+// Extend inside the scope of another type, using a message.
+type LoginMessage struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *LoginMessage) Reset()         { *m = LoginMessage{} }
+func (m *LoginMessage) String() string { return proto.CompactTextString(m) }
+func (*LoginMessage) ProtoMessage()    {}
+func (*LoginMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_user_af41b5e0bdfb7846, []int{2}
+}
+func (m *LoginMessage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LoginMessage.Unmarshal(m, b)
+}
+func (m *LoginMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LoginMessage.Marshal(b, m, deterministic)
+}
+func (dst *LoginMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LoginMessage.Merge(dst, src)
+}
+func (m *LoginMessage) XXX_Size() int {
+	return xxx_messageInfo_LoginMessage.Size(m)
+}
+func (m *LoginMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_LoginMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LoginMessage proto.InternalMessageInfo
+
+var E_LoginMessage_UserMessage = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.BaseMessage)(nil),
+	ExtensionType: (*UserMessage)(nil),
+	Field:         16,
+	Name:          "extension_user.LoginMessage.user_message",
+	Tag:           "bytes,16,opt,name=user_message,json=userMessage",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+type Detail struct {
+	Color                *string  `protobuf:"bytes,1,opt,name=color" json:"color,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Detail) Reset()         { *m = Detail{} }
+func (m *Detail) String() string { return proto.CompactTextString(m) }
+func (*Detail) ProtoMessage()    {}
+func (*Detail) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_user_af41b5e0bdfb7846, []int{3}
+}
+func (m *Detail) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Detail.Unmarshal(m, b)
+}
+func (m *Detail) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Detail.Marshal(b, m, deterministic)
+}
+func (dst *Detail) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Detail.Merge(dst, src)
+}
+func (m *Detail) XXX_Size() int {
+	return xxx_messageInfo_Detail.Size(m)
+}
+func (m *Detail) XXX_DiscardUnknown() {
+	xxx_messageInfo_Detail.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Detail proto.InternalMessageInfo
+
+func (m *Detail) GetColor() string {
+	if m != nil && m.Color != nil {
+		return *m.Color
+	}
+	return ""
+}
+
+// An extension of an extension
+type Announcement struct {
+	Words                *string  `protobuf:"bytes,1,opt,name=words" json:"words,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Announcement) Reset()         { *m = Announcement{} }
+func (m *Announcement) String() string { return proto.CompactTextString(m) }
+func (*Announcement) ProtoMessage()    {}
+func (*Announcement) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_user_af41b5e0bdfb7846, []int{4}
+}
+func (m *Announcement) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Announcement.Unmarshal(m, b)
+}
+func (m *Announcement) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Announcement.Marshal(b, m, deterministic)
+}
+func (dst *Announcement) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Announcement.Merge(dst, src)
+}
+func (m *Announcement) XXX_Size() int {
+	return xxx_messageInfo_Announcement.Size(m)
+}
+func (m *Announcement) XXX_DiscardUnknown() {
+	xxx_messageInfo_Announcement.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Announcement proto.InternalMessageInfo
+
+func (m *Announcement) GetWords() string {
+	if m != nil && m.Words != nil {
+		return *m.Words
+	}
+	return ""
+}
+
+var E_Announcement_LoudExt = &proto.ExtensionDesc{
+	ExtendedType:  (*LoudMessage)(nil),
+	ExtensionType: (*Announcement)(nil),
+	Field:         100,
+	Name:          "extension_user.Announcement.loud_ext",
+	Tag:           "bytes,100,opt,name=loud_ext,json=loudExt",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+// Something that can be put in a message set.
+type OldStyleParcel struct {
+	Name                 *string  `protobuf:"bytes,1,req,name=name" json:"name,omitempty"`
+	Height               *int32   `protobuf:"varint,2,opt,name=height" json:"height,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *OldStyleParcel) Reset()         { *m = OldStyleParcel{} }
+func (m *OldStyleParcel) String() string { return proto.CompactTextString(m) }
+func (*OldStyleParcel) ProtoMessage()    {}
+func (*OldStyleParcel) Descriptor() ([]byte, []int) {
+	return fileDescriptor_extension_user_af41b5e0bdfb7846, []int{5}
+}
+func (m *OldStyleParcel) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OldStyleParcel.Unmarshal(m, b)
+}
+func (m *OldStyleParcel) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OldStyleParcel.Marshal(b, m, deterministic)
+}
+func (dst *OldStyleParcel) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OldStyleParcel.Merge(dst, src)
+}
+func (m *OldStyleParcel) XXX_Size() int {
+	return xxx_messageInfo_OldStyleParcel.Size(m)
+}
+func (m *OldStyleParcel) XXX_DiscardUnknown() {
+	xxx_messageInfo_OldStyleParcel.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OldStyleParcel proto.InternalMessageInfo
+
+func (m *OldStyleParcel) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *OldStyleParcel) GetHeight() int32 {
+	if m != nil && m.Height != nil {
+		return *m.Height
+	}
+	return 0
+}
+
+var E_OldStyleParcel_MessageSetExtension = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.OldStyleMessage)(nil),
+	ExtensionType: (*OldStyleParcel)(nil),
+	Field:         2001,
+	Name:          "extension_user.OldStyleParcel",
+	Tag:           "bytes,2001,opt,name=message_set_extension,json=messageSetExtension",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+var E_UserMessage = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.BaseMessage)(nil),
+	ExtensionType: (*UserMessage)(nil),
+	Field:         5,
+	Name:          "extension_user.user_message",
+	Tag:           "bytes,5,opt,name=user_message,json=userMessage",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+var E_ExtraMessage = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.BaseMessage)(nil),
+	ExtensionType: (*extension_extra.ExtraMessage)(nil),
+	Field:         9,
+	Name:          "extension_user.extra_message",
+	Tag:           "bytes,9,opt,name=extra_message,json=extraMessage",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+var E_Width = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.BaseMessage)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         6,
+	Name:          "extension_user.width",
+	Tag:           "varint,6,opt,name=width",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+var E_Area = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.BaseMessage)(nil),
+	ExtensionType: (*int64)(nil),
+	Field:         7,
+	Name:          "extension_user.area",
+	Tag:           "varint,7,opt,name=area",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+var E_Detail = &proto.ExtensionDesc{
+	ExtendedType:  (*extension_base.BaseMessage)(nil),
+	ExtensionType: ([]*Detail)(nil),
+	Field:         17,
+	Name:          "extension_user.detail",
+	Tag:           "bytes,17,rep,name=detail",
+	Filename:      "extension_user/extension_user.proto",
+}
+
+func init() {
+	proto.RegisterType((*UserMessage)(nil), "extension_user.UserMessage")
+	proto.RegisterType((*LoudMessage)(nil), "extension_user.LoudMessage")
+	proto.RegisterType((*LoginMessage)(nil), "extension_user.LoginMessage")
+	proto.RegisterType((*Detail)(nil), "extension_user.Detail")
+	proto.RegisterType((*Announcement)(nil), "extension_user.Announcement")
+	proto.RegisterMessageSetType((*OldStyleParcel)(nil), 2001, "extension_user.OldStyleParcel")
+	proto.RegisterType((*OldStyleParcel)(nil), "extension_user.OldStyleParcel")
+	proto.RegisterExtension(E_LoudMessage_Volume)
+	proto.RegisterExtension(E_LoginMessage_UserMessage)
+	proto.RegisterExtension(E_Announcement_LoudExt)
+	proto.RegisterExtension(E_OldStyleParcel_MessageSetExtension)
+	proto.RegisterExtension(E_UserMessage)
+	proto.RegisterExtension(E_ExtraMessage)
+	proto.RegisterExtension(E_Width)
+	proto.RegisterExtension(E_Area)
+	proto.RegisterExtension(E_Detail)
+}
+
+func init() {
+	proto.RegisterFile("extension_user/extension_user.proto", fileDescriptor_extension_user_af41b5e0bdfb7846)
+}
+
+var fileDescriptor_extension_user_af41b5e0bdfb7846 = []byte{
+	// 492 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x54, 0x51, 0x6f, 0x94, 0x40,
+	0x10, 0x0e, 0x6d, 0x8f, 0x5e, 0x87, 0x6b, 0xad, 0xa8, 0xcd, 0xa5, 0x6a, 0x25, 0x18, 0x13, 0x62,
+	0xd2, 0x23, 0x62, 0x7c, 0xe1, 0x49, 0x2f, 0xde, 0x93, 0x67, 0x34, 0x54, 0x5f, 0xf4, 0x81, 0xec,
+	0xc1, 0xc8, 0x91, 0xc2, 0xae, 0xd9, 0x5d, 0xec, 0xe9, 0xd3, 0xfd, 0x26, 0xff, 0x89, 0xff, 0xc8,
+	0xb0, 0x2c, 0x2d, 0x87, 0xc9, 0xc5, 0xbe, 0x90, 0xfd, 0x86, 0x6f, 0xbe, 0x99, 0xfd, 0x66, 0x00,
+	0x9e, 0xe2, 0x4a, 0x22, 0x15, 0x39, 0xa3, 0x71, 0x25, 0x90, 0xfb, 0x9b, 0x70, 0xf2, 0x9d, 0x33,
+	0xc9, 0xec, 0xa3, 0xcd, 0xe8, 0x69, 0x27, 0x69, 0x41, 0x04, 0xfa, 0x9b, 0xb0, 0x49, 0x3a, 0x7d,
+	0x76, 0x13, 0xc5, 0x95, 0xe4, 0xc4, 0xef, 0xe1, 0x86, 0xe6, 0xbe, 0x02, 0xeb, 0xb3, 0x40, 0xfe,
+	0x1e, 0x85, 0x20, 0x19, 0xda, 0x36, 0xec, 0x51, 0x52, 0xe2, 0xd8, 0x70, 0x0c, 0xef, 0x20, 0x52,
+	0xe7, 0x3a, 0xc6, 0x09, 0xbd, 0x1c, 0xef, 0x34, 0xb1, 0xfa, 0xec, 0xce, 0xc1, 0x9a, 0xb3, 0x2a,
+	0xd5, 0x69, 0xcf, 0x87, 0xc3, 0xf4, 0x78, 0xbd, 0x5e, 0xaf, 0x77, 0x82, 0x97, 0x60, 0xfe, 0x60,
+	0x45, 0x55, 0xa2, 0xfd, 0x70, 0xd2, 0xeb, 0x6b, 0x4a, 0x04, 0xea, 0x84, 0xf1, 0xd0, 0x31, 0xbc,
+	0xc3, 0x48, 0x53, 0xdd, 0x4b, 0x18, 0xcd, 0x59, 0x96, 0x53, 0xfd, 0x36, 0xf8, 0x0a, 0xa3, 0xfa,
+	0xa2, 0x71, 0xa9, 0xbb, 0xda, 0x2a, 0x75, 0xec, 0x18, 0x9e, 0x15, 0x74, 0x29, 0xca, 0xba, 0xce,
+	0xad, 0x22, 0xab, 0xba, 0x01, 0xee, 0x19, 0x98, 0x6f, 0x51, 0x92, 0xbc, 0xb0, 0xef, 0xc3, 0x20,
+	0x61, 0x05, 0xe3, 0xfa, 0xb6, 0x0d, 0x70, 0x7f, 0xc1, 0xe8, 0x0d, 0xa5, 0xac, 0xa2, 0x09, 0x96,
+	0x48, 0x65, 0xcd, 0xba, 0x62, 0x3c, 0x15, 0x2d, 0x4b, 0x81, 0xe0, 0x13, 0x0c, 0x0b, 0x56, 0xa5,
+	0xb5, 0x97, 0xf6, 0x3f, 0xb5, 0x3b, 0xd6, 0x8c, 0x53, 0xd5, 0xde, 0xa3, 0x3e, 0xa5, 0x5b, 0x22,
+	0xda, 0xaf, 0xa5, 0x66, 0x2b, 0xe9, 0xfe, 0x36, 0xe0, 0xe8, 0x43, 0x91, 0x5e, 0xc8, 0x9f, 0x05,
+	0x7e, 0x24, 0x3c, 0xc1, 0xa2, 0x33, 0x91, 0x9d, 0xeb, 0x89, 0x9c, 0x80, 0xb9, 0xc4, 0x3c, 0x5b,
+	0x4a, 0x35, 0x93, 0x41, 0xa4, 0x51, 0x20, 0xe1, 0x81, 0xb6, 0x2c, 0x16, 0x28, 0xe3, 0xeb, 0x92,
+	0xf6, 0x93, 0xbe, 0x81, 0x6d, 0x91, 0xb6, 0xcb, 0x3f, 0x77, 0x54, 0x9b, 0x67, 0xfd, 0x36, 0x37,
+	0x9b, 0x89, 0xee, 0x69, 0xf9, 0x0b, 0x94, 0xb3, 0x96, 0x18, 0xde, 0x6a, 0x5a, 0x83, 0xdb, 0x4d,
+	0x2b, 0x8c, 0xe1, 0x50, 0xad, 0xeb, 0xff, 0xa9, 0x1f, 0x28, 0xf5, 0xc7, 0x93, 0xfe, 0xae, 0xcf,
+	0xea, 0x67, 0xab, 0x3f, 0xc2, 0x0e, 0x0a, 0x5f, 0xc0, 0xe0, 0x2a, 0x4f, 0xe5, 0x72, 0xbb, 0xb0,
+	0xa9, 0x7c, 0x6e, 0x98, 0xa1, 0x0f, 0x7b, 0x84, 0x23, 0xd9, 0x9e, 0xb1, 0xef, 0x18, 0xde, 0x6e,
+	0xa4, 0x88, 0xe1, 0x3b, 0x30, 0xd3, 0x66, 0xe5, 0xb6, 0xa6, 0xdc, 0x75, 0x76, 0x3d, 0x2b, 0x38,
+	0xe9, 0x7b, 0xd3, 0x6c, 0x6b, 0xa4, 0x25, 0xa6, 0xd3, 0x2f, 0xaf, 0xb3, 0x5c, 0x2e, 0xab, 0xc5,
+	0x24, 0x61, 0xa5, 0x9f, 0xb1, 0x82, 0xd0, 0xcc, 0x57, 0x1f, 0xf3, 0xa2, 0xfa, 0xd6, 0x1c, 0x92,
+	0xf3, 0x0c, 0xe9, 0x79, 0xc6, 0x7c, 0x89, 0x42, 0xa6, 0x44, 0x92, 0xde, 0x7f, 0xe5, 0x6f, 0x00,
+	0x00, 0x00, 0xff, 0xff, 0xdf, 0x18, 0x64, 0x15, 0x77, 0x04, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/extension_user.proto b/protoc-gen-go/testdata/extension_user/extension_user.proto
similarity index 94%
rename from protoc-gen-go/testdata/extension_user.proto
rename to protoc-gen-go/testdata/extension_user/extension_user.proto
index ff65873..033c186 100644
--- a/protoc-gen-go/testdata/extension_user.proto
+++ b/protoc-gen-go/testdata/extension_user/extension_user.proto
@@ -31,11 +31,13 @@
 
 syntax = "proto2";
 
-import "extension_base.proto";
-import "extension_extra.proto";
+import "extension_base/extension_base.proto";
+import "extension_extra/extension_extra.proto";
 
 package extension_user;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/extension_user";
+
 message UserMessage {
   optional string name = 1;
   optional string rank = 2;
diff --git a/protoc-gen-go/testdata/grpc/grpc.pb.go b/protoc-gen-go/testdata/grpc/grpc.pb.go
new file mode 100644
index 0000000..0bb4cbf
--- /dev/null
+++ b/protoc-gen-go/testdata/grpc/grpc.pb.go
@@ -0,0 +1,444 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: grpc/grpc.proto
+
+package testing // import "github.com/golang/protobuf/protoc-gen-go/testdata/grpc"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type SimpleRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SimpleRequest) Reset()         { *m = SimpleRequest{} }
+func (m *SimpleRequest) String() string { return proto.CompactTextString(m) }
+func (*SimpleRequest) ProtoMessage()    {}
+func (*SimpleRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_grpc_65bf3902e49ee873, []int{0}
+}
+func (m *SimpleRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SimpleRequest.Unmarshal(m, b)
+}
+func (m *SimpleRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SimpleRequest.Marshal(b, m, deterministic)
+}
+func (dst *SimpleRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SimpleRequest.Merge(dst, src)
+}
+func (m *SimpleRequest) XXX_Size() int {
+	return xxx_messageInfo_SimpleRequest.Size(m)
+}
+func (m *SimpleRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SimpleRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SimpleRequest proto.InternalMessageInfo
+
+type SimpleResponse struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SimpleResponse) Reset()         { *m = SimpleResponse{} }
+func (m *SimpleResponse) String() string { return proto.CompactTextString(m) }
+func (*SimpleResponse) ProtoMessage()    {}
+func (*SimpleResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_grpc_65bf3902e49ee873, []int{1}
+}
+func (m *SimpleResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SimpleResponse.Unmarshal(m, b)
+}
+func (m *SimpleResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SimpleResponse.Marshal(b, m, deterministic)
+}
+func (dst *SimpleResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SimpleResponse.Merge(dst, src)
+}
+func (m *SimpleResponse) XXX_Size() int {
+	return xxx_messageInfo_SimpleResponse.Size(m)
+}
+func (m *SimpleResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_SimpleResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SimpleResponse proto.InternalMessageInfo
+
+type StreamMsg struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StreamMsg) Reset()         { *m = StreamMsg{} }
+func (m *StreamMsg) String() string { return proto.CompactTextString(m) }
+func (*StreamMsg) ProtoMessage()    {}
+func (*StreamMsg) Descriptor() ([]byte, []int) {
+	return fileDescriptor_grpc_65bf3902e49ee873, []int{2}
+}
+func (m *StreamMsg) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StreamMsg.Unmarshal(m, b)
+}
+func (m *StreamMsg) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StreamMsg.Marshal(b, m, deterministic)
+}
+func (dst *StreamMsg) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StreamMsg.Merge(dst, src)
+}
+func (m *StreamMsg) XXX_Size() int {
+	return xxx_messageInfo_StreamMsg.Size(m)
+}
+func (m *StreamMsg) XXX_DiscardUnknown() {
+	xxx_messageInfo_StreamMsg.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StreamMsg proto.InternalMessageInfo
+
+type StreamMsg2 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StreamMsg2) Reset()         { *m = StreamMsg2{} }
+func (m *StreamMsg2) String() string { return proto.CompactTextString(m) }
+func (*StreamMsg2) ProtoMessage()    {}
+func (*StreamMsg2) Descriptor() ([]byte, []int) {
+	return fileDescriptor_grpc_65bf3902e49ee873, []int{3}
+}
+func (m *StreamMsg2) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StreamMsg2.Unmarshal(m, b)
+}
+func (m *StreamMsg2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StreamMsg2.Marshal(b, m, deterministic)
+}
+func (dst *StreamMsg2) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StreamMsg2.Merge(dst, src)
+}
+func (m *StreamMsg2) XXX_Size() int {
+	return xxx_messageInfo_StreamMsg2.Size(m)
+}
+func (m *StreamMsg2) XXX_DiscardUnknown() {
+	xxx_messageInfo_StreamMsg2.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StreamMsg2 proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*SimpleRequest)(nil), "grpc.testing.SimpleRequest")
+	proto.RegisterType((*SimpleResponse)(nil), "grpc.testing.SimpleResponse")
+	proto.RegisterType((*StreamMsg)(nil), "grpc.testing.StreamMsg")
+	proto.RegisterType((*StreamMsg2)(nil), "grpc.testing.StreamMsg2")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for Test service
+
+type TestClient interface {
+	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
+	// This RPC streams from the server only.
+	Downstream(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (Test_DownstreamClient, error)
+	// This RPC streams from the client.
+	Upstream(ctx context.Context, opts ...grpc.CallOption) (Test_UpstreamClient, error)
+	// This one streams in both directions.
+	Bidi(ctx context.Context, opts ...grpc.CallOption) (Test_BidiClient, error)
+}
+
+type testClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewTestClient(cc *grpc.ClientConn) TestClient {
+	return &testClient{cc}
+}
+
+func (c *testClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
+	out := new(SimpleResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.Test/UnaryCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testClient) Downstream(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (Test_DownstreamClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_Test_serviceDesc.Streams[0], c.cc, "/grpc.testing.Test/Downstream", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testDownstreamClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type Test_DownstreamClient interface {
+	Recv() (*StreamMsg, error)
+	grpc.ClientStream
+}
+
+type testDownstreamClient struct {
+	grpc.ClientStream
+}
+
+func (x *testDownstreamClient) Recv() (*StreamMsg, error) {
+	m := new(StreamMsg)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testClient) Upstream(ctx context.Context, opts ...grpc.CallOption) (Test_UpstreamClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_Test_serviceDesc.Streams[1], c.cc, "/grpc.testing.Test/Upstream", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testUpstreamClient{stream}
+	return x, nil
+}
+
+type Test_UpstreamClient interface {
+	Send(*StreamMsg) error
+	CloseAndRecv() (*SimpleResponse, error)
+	grpc.ClientStream
+}
+
+type testUpstreamClient struct {
+	grpc.ClientStream
+}
+
+func (x *testUpstreamClient) Send(m *StreamMsg) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testUpstreamClient) CloseAndRecv() (*SimpleResponse, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(SimpleResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testClient) Bidi(ctx context.Context, opts ...grpc.CallOption) (Test_BidiClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_Test_serviceDesc.Streams[2], c.cc, "/grpc.testing.Test/Bidi", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testBidiClient{stream}
+	return x, nil
+}
+
+type Test_BidiClient interface {
+	Send(*StreamMsg) error
+	Recv() (*StreamMsg2, error)
+	grpc.ClientStream
+}
+
+type testBidiClient struct {
+	grpc.ClientStream
+}
+
+func (x *testBidiClient) Send(m *StreamMsg) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testBidiClient) Recv() (*StreamMsg2, error) {
+	m := new(StreamMsg2)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for Test service
+
+type TestServer interface {
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// This RPC streams from the server only.
+	Downstream(*SimpleRequest, Test_DownstreamServer) error
+	// This RPC streams from the client.
+	Upstream(Test_UpstreamServer) error
+	// This one streams in both directions.
+	Bidi(Test_BidiServer) error
+}
+
+func RegisterTestServer(s *grpc.Server, srv TestServer) {
+	s.RegisterService(&_Test_serviceDesc, srv)
+}
+
+func _Test_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SimpleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServer).UnaryCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.Test/UnaryCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServer).UnaryCall(ctx, req.(*SimpleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Test_Downstream_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(SimpleRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(TestServer).Downstream(m, &testDownstreamServer{stream})
+}
+
+type Test_DownstreamServer interface {
+	Send(*StreamMsg) error
+	grpc.ServerStream
+}
+
+type testDownstreamServer struct {
+	grpc.ServerStream
+}
+
+func (x *testDownstreamServer) Send(m *StreamMsg) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _Test_Upstream_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServer).Upstream(&testUpstreamServer{stream})
+}
+
+type Test_UpstreamServer interface {
+	SendAndClose(*SimpleResponse) error
+	Recv() (*StreamMsg, error)
+	grpc.ServerStream
+}
+
+type testUpstreamServer struct {
+	grpc.ServerStream
+}
+
+func (x *testUpstreamServer) SendAndClose(m *SimpleResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testUpstreamServer) Recv() (*StreamMsg, error) {
+	m := new(StreamMsg)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _Test_Bidi_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServer).Bidi(&testBidiServer{stream})
+}
+
+type Test_BidiServer interface {
+	Send(*StreamMsg2) error
+	Recv() (*StreamMsg, error)
+	grpc.ServerStream
+}
+
+type testBidiServer struct {
+	grpc.ServerStream
+}
+
+func (x *testBidiServer) Send(m *StreamMsg2) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testBidiServer) Recv() (*StreamMsg, error) {
+	m := new(StreamMsg)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _Test_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.Test",
+	HandlerType: (*TestServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "UnaryCall",
+			Handler:    _Test_UnaryCall_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Downstream",
+			Handler:       _Test_Downstream_Handler,
+			ServerStreams: true,
+		},
+		{
+			StreamName:    "Upstream",
+			Handler:       _Test_Upstream_Handler,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "Bidi",
+			Handler:       _Test_Bidi_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "grpc/grpc.proto",
+}
+
+func init() { proto.RegisterFile("grpc/grpc.proto", fileDescriptor_grpc_65bf3902e49ee873) }
+
+var fileDescriptor_grpc_65bf3902e49ee873 = []byte{
+	// 244 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x4f, 0x2f, 0x2a, 0x48,
+	0xd6, 0x07, 0x11, 0x7a, 0x05, 0x45, 0xf9, 0x25, 0xf9, 0x42, 0x3c, 0x60, 0x76, 0x49, 0x6a, 0x71,
+	0x49, 0x66, 0x5e, 0xba, 0x12, 0x3f, 0x17, 0x6f, 0x70, 0x66, 0x6e, 0x41, 0x4e, 0x6a, 0x50, 0x6a,
+	0x61, 0x69, 0x6a, 0x71, 0x89, 0x92, 0x00, 0x17, 0x1f, 0x4c, 0xa0, 0xb8, 0x20, 0x3f, 0xaf, 0x38,
+	0x55, 0x89, 0x9b, 0x8b, 0x33, 0xb8, 0xa4, 0x28, 0x35, 0x31, 0xd7, 0xb7, 0x38, 0x5d, 0x89, 0x87,
+	0x8b, 0x0b, 0xce, 0x31, 0x32, 0x9a, 0xc1, 0xc4, 0xc5, 0x12, 0x92, 0x5a, 0x5c, 0x22, 0xe4, 0xc6,
+	0xc5, 0x19, 0x9a, 0x97, 0x58, 0x54, 0xe9, 0x9c, 0x98, 0x93, 0x23, 0x24, 0xad, 0x87, 0x6c, 0x85,
+	0x1e, 0x8a, 0xf9, 0x52, 0x32, 0xd8, 0x25, 0x21, 0x76, 0x09, 0xb9, 0x70, 0x71, 0xb9, 0xe4, 0x97,
+	0xe7, 0x15, 0x83, 0xad, 0xc0, 0x6f, 0x90, 0x38, 0x9a, 0x24, 0xcc, 0x55, 0x06, 0x8c, 0x42, 0xce,
+	0x5c, 0x1c, 0xa1, 0x05, 0x50, 0x33, 0x70, 0x29, 0xc3, 0xef, 0x10, 0x0d, 0x46, 0x21, 0x5b, 0x2e,
+	0x16, 0xa7, 0xcc, 0x94, 0x4c, 0xdc, 0x06, 0x48, 0xe0, 0x90, 0x30, 0xd2, 0x60, 0x34, 0x60, 0x74,
+	0x72, 0x88, 0xb2, 0x4b, 0xcf, 0x2c, 0xc9, 0x28, 0x4d, 0xd2, 0x4b, 0xce, 0xcf, 0xd5, 0x4f, 0xcf,
+	0xcf, 0x49, 0xcc, 0x4b, 0xd7, 0x07, 0xc7, 0x40, 0x52, 0x69, 0x1a, 0x84, 0x91, 0xac, 0x9b, 0x9e,
+	0x9a, 0xa7, 0x9b, 0x9e, 0xaf, 0x0f, 0x32, 0x22, 0x25, 0xb1, 0x24, 0x11, 0x1c, 0x4d, 0xd6, 0x50,
+	0x03, 0x93, 0xd8, 0xc0, 0x8a, 0x8c, 0x01, 0x01, 0x00, 0x00, 0xff, 0xff, 0x90, 0xb9, 0x95, 0x42,
+	0xc2, 0x01, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/grpc.proto b/protoc-gen-go/testdata/grpc/grpc.proto
similarity index 95%
rename from protoc-gen-go/testdata/grpc.proto
rename to protoc-gen-go/testdata/grpc/grpc.proto
index b8bc41a..0e5c64a 100644
--- a/protoc-gen-go/testdata/grpc.proto
+++ b/protoc-gen-go/testdata/grpc/grpc.proto
@@ -33,6 +33,8 @@
 
 package grpc.testing;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/grpc;testing";
+
 message SimpleRequest {
 }
 
diff --git a/protoc-gen-go/testdata/imp.pb.go.golden b/protoc-gen-go/testdata/imp.pb.go.golden
deleted file mode 100644
index 784a4f8..0000000
--- a/protoc-gen-go/testdata/imp.pb.go.golden
+++ /dev/null
@@ -1,113 +0,0 @@
-// Code generated by protoc-gen-go.
-// source: imp.proto
-// DO NOT EDIT!
-
-package imp
-
-import proto "github.com/golang/protobuf/proto"
-import "math"
-import "os"
-import imp1 "imp2.pb"
-
-// Reference proto & math imports to suppress error if they are not otherwise used.
-var _ = proto.GetString
-var _ = math.Inf
-
-// Types from public import imp2.proto
-type PubliclyImportedMessage imp1.PubliclyImportedMessage
-
-func (this *PubliclyImportedMessage) Reset() { (*imp1.PubliclyImportedMessage)(this).Reset() }
-func (this *PubliclyImportedMessage) String() string {
-	return (*imp1.PubliclyImportedMessage)(this).String()
-}
-
-// PubliclyImportedMessage from public import imp.proto
-
-type ImportedMessage_Owner int32
-
-const (
-	ImportedMessage_DAVE ImportedMessage_Owner = 1
-	ImportedMessage_MIKE ImportedMessage_Owner = 2
-)
-
-var ImportedMessage_Owner_name = map[int32]string{
-	1: "DAVE",
-	2: "MIKE",
-}
-var ImportedMessage_Owner_value = map[string]int32{
-	"DAVE": 1,
-	"MIKE": 2,
-}
-
-// NewImportedMessage_Owner is deprecated. Use x.Enum() instead.
-func NewImportedMessage_Owner(x ImportedMessage_Owner) *ImportedMessage_Owner {
-	e := ImportedMessage_Owner(x)
-	return &e
-}
-func (x ImportedMessage_Owner) Enum() *ImportedMessage_Owner {
-	p := new(ImportedMessage_Owner)
-	*p = x
-	return p
-}
-func (x ImportedMessage_Owner) String() string {
-	return proto.EnumName(ImportedMessage_Owner_name, int32(x))
-}
-
-type ImportedMessage struct {
-	Field            *int64           `protobuf:"varint,1,req,name=field" json:"field,omitempty"`
-	XXX_extensions   map[int32][]byte `json:",omitempty"`
-	XXX_unrecognized []byte           `json:",omitempty"`
-}
-
-func (this *ImportedMessage) Reset()         { *this = ImportedMessage{} }
-func (this *ImportedMessage) String() string { return proto.CompactTextString(this) }
-
-var extRange_ImportedMessage = []proto.ExtensionRange{
-	proto.ExtensionRange{90, 100},
-}
-
-func (*ImportedMessage) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_ImportedMessage
-}
-func (this *ImportedMessage) ExtensionMap() map[int32][]byte {
-	if this.XXX_extensions == nil {
-		this.XXX_extensions = make(map[int32][]byte)
-	}
-	return this.XXX_extensions
-}
-
-type ImportedExtendable struct {
-	XXX_extensions   map[int32][]byte `json:",omitempty"`
-	XXX_unrecognized []byte           `json:",omitempty"`
-}
-
-func (this *ImportedExtendable) Reset()         { *this = ImportedExtendable{} }
-func (this *ImportedExtendable) String() string { return proto.CompactTextString(this) }
-
-func (this *ImportedExtendable) Marshal() ([]byte, error) {
-	return proto.MarshalMessageSet(this.ExtensionMap())
-}
-func (this *ImportedExtendable) Unmarshal(buf []byte) error {
-	return proto.UnmarshalMessageSet(buf, this.ExtensionMap())
-}
-// ensure ImportedExtendable satisfies proto.Marshaler and proto.Unmarshaler
-var _ proto.Marshaler = (*ImportedExtendable)(nil)
-var _ proto.Unmarshaler = (*ImportedExtendable)(nil)
-
-var extRange_ImportedExtendable = []proto.ExtensionRange{
-	proto.ExtensionRange{100, 536870911},
-}
-
-func (*ImportedExtendable) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_ImportedExtendable
-}
-func (this *ImportedExtendable) ExtensionMap() map[int32][]byte {
-	if this.XXX_extensions == nil {
-		this.XXX_extensions = make(map[int32][]byte)
-	}
-	return this.XXX_extensions
-}
-
-func init() {
-	proto.RegisterEnum("imp.ImportedMessage_Owner", ImportedMessage_Owner_name, ImportedMessage_Owner_value)
-}
diff --git a/protoc-gen-go/testdata/imp.proto b/protoc-gen-go/testdata/imp.proto
deleted file mode 100644
index 156e078..0000000
--- a/protoc-gen-go/testdata/imp.proto
+++ /dev/null
@@ -1,70 +0,0 @@
-// Go support for Protocol Buffers - Google's data interchange format
-//
-// Copyright 2010 The Go Authors.  All rights reserved.
-// https://github.com/golang/protobuf
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-syntax = "proto2";
-
-package imp;
-
-import "imp2.proto";
-import "imp3.proto";
-
-message ImportedMessage {
-  required int64 field = 1;
-
-  // The forwarded getters for these fields are fiddly to get right.
-  optional ImportedMessage2 local_msg = 2;
-  optional ForeignImportedMessage foreign_msg = 3;  // in imp3.proto
-  optional Owner enum_field = 4;
-  oneof union {
-    int32 state = 9;
-  }
-
-  repeated string name = 5;
-  repeated Owner boss = 6;
-  repeated ImportedMessage2 memo = 7;
-
-  map<string, ImportedMessage2> msg_map = 8;
-
-  enum Owner {
-    DAVE = 1;
-    MIKE = 2;
-  }
-
-  extensions 90 to 100;
-}
-
-message ImportedMessage2 {
-}
-
-message ImportedExtendable {
-  option message_set_wire_format = true;
-  extensions 100 to max;
-}
diff --git a/protoc-gen-go/testdata/import_public/a.pb.go b/protoc-gen-go/testdata/import_public/a.pb.go
new file mode 100644
index 0000000..5b780fd
--- /dev/null
+++ b/protoc-gen-go/testdata/import_public/a.pb.go
@@ -0,0 +1,110 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: import_public/a.proto
+
+package import_public // import "github.com/golang/protobuf/protoc-gen-go/testdata/import_public"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import sub "github.com/golang/protobuf/protoc-gen-go/testdata/import_public/sub"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// M from public import import_public/sub/a.proto
+type M = sub.M
+
+// E from public import import_public/sub/a.proto
+type E = sub.E
+
+var E_name = sub.E_name
+var E_value = sub.E_value
+
+const E_ZERO = E(sub.E_ZERO)
+
+// Ignoring public import of Local from import_public/b.proto
+
+type Public struct {
+	M                    *sub.M   `protobuf:"bytes,1,opt,name=m" json:"m,omitempty"`
+	E                    sub.E    `protobuf:"varint,2,opt,name=e,enum=goproto.test.import_public.sub.E" json:"e,omitempty"`
+	Local                *Local   `protobuf:"bytes,3,opt,name=local" json:"local,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Public) Reset()         { *m = Public{} }
+func (m *Public) String() string { return proto.CompactTextString(m) }
+func (*Public) ProtoMessage()    {}
+func (*Public) Descriptor() ([]byte, []int) {
+	return fileDescriptor_a_c0314c022b7c17d8, []int{0}
+}
+func (m *Public) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Public.Unmarshal(m, b)
+}
+func (m *Public) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Public.Marshal(b, m, deterministic)
+}
+func (dst *Public) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Public.Merge(dst, src)
+}
+func (m *Public) XXX_Size() int {
+	return xxx_messageInfo_Public.Size(m)
+}
+func (m *Public) XXX_DiscardUnknown() {
+	xxx_messageInfo_Public.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Public proto.InternalMessageInfo
+
+func (m *Public) GetM() *sub.M {
+	if m != nil {
+		return m.M
+	}
+	return nil
+}
+
+func (m *Public) GetE() sub.E {
+	if m != nil {
+		return m.E
+	}
+	return sub.E_ZERO
+}
+
+func (m *Public) GetLocal() *Local {
+	if m != nil {
+		return m.Local
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Public)(nil), "goproto.test.import_public.Public")
+}
+
+func init() { proto.RegisterFile("import_public/a.proto", fileDescriptor_a_c0314c022b7c17d8) }
+
+var fileDescriptor_a_c0314c022b7c17d8 = []byte{
+	// 200 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0xcd, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x89, 0x2f, 0x28, 0x4d, 0xca, 0xc9, 0x4c, 0xd6, 0x4f, 0xd4, 0x2b, 0x28, 0xca, 0x2f,
+	0xc9, 0x17, 0x92, 0x4a, 0xcf, 0x07, 0x33, 0xf4, 0x4a, 0x52, 0x8b, 0x4b, 0xf4, 0x50, 0xd4, 0x48,
+	0x49, 0xa2, 0x6a, 0x29, 0x2e, 0x4d, 0x82, 0x69, 0x93, 0x42, 0x33, 0x2d, 0x09, 0x22, 0xac, 0xb4,
+	0x98, 0x91, 0x8b, 0x2d, 0x00, 0x2c, 0x24, 0xa4, 0xcf, 0xc5, 0x98, 0x2b, 0xc1, 0xa8, 0xc0, 0xa8,
+	0xc1, 0x6d, 0xa4, 0xa8, 0x87, 0xdb, 0x12, 0xbd, 0xe2, 0xd2, 0x24, 0x3d, 0xdf, 0x20, 0xc6, 0x5c,
+	0x90, 0x86, 0x54, 0x09, 0x26, 0x05, 0x46, 0x0d, 0x3e, 0xc2, 0x1a, 0x5c, 0x83, 0x18, 0x53, 0x85,
+	0xcc, 0xb9, 0x58, 0x73, 0xf2, 0x93, 0x13, 0x73, 0x24, 0x98, 0x09, 0xdb, 0xe2, 0x03, 0x52, 0x18,
+	0x04, 0x51, 0xef, 0xe4, 0x18, 0x65, 0x9f, 0x9e, 0x59, 0x92, 0x51, 0x9a, 0xa4, 0x97, 0x9c, 0x9f,
+	0xab, 0x9f, 0x9e, 0x9f, 0x93, 0x98, 0x97, 0xae, 0x0f, 0xd6, 0x9a, 0x54, 0x9a, 0x06, 0x61, 0x24,
+	0xeb, 0xa6, 0xa7, 0xe6, 0xe9, 0xa6, 0xe7, 0xeb, 0x83, 0xcc, 0x4a, 0x49, 0x2c, 0x49, 0xd4, 0x47,
+	0x31, 0x2f, 0x80, 0x21, 0x80, 0x31, 0x89, 0x0d, 0xac, 0xd2, 0x18, 0x10, 0x00, 0x00, 0xff, 0xff,
+	0x70, 0xc5, 0xc3, 0x79, 0x5a, 0x01, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/proto3.proto b/protoc-gen-go/testdata/import_public/a.proto
similarity index 78%
copy from protoc-gen-go/testdata/proto3.proto
copy to protoc-gen-go/testdata/import_public/a.proto
index 869b9af..957ad89 100644
--- a/protoc-gen-go/testdata/proto3.proto
+++ b/protoc-gen-go/testdata/import_public/a.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2014 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -31,23 +31,15 @@
 
 syntax = "proto3";
 
-package proto3;
+package goproto.test.import_public;
 
-message Request {
-  enum Flavour {
-    SWEET = 0;
-    SOUR = 1;
-    UMAMI = 2;
-    GOPHERLICIOUS = 3;
-  }
-  string name = 1;
-  repeated int64 key = 2;
-  Flavour taste = 3;
-  Book book = 4;
-  repeated int64 unpacked = 5 [packed=false];
-}
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/import_public";
 
-message Book {
-  string title = 1;
-  bytes raw_data = 2;
+import public "import_public/sub/a.proto"; // Different Go package.
+import public "import_public/b.proto";     // Same Go package.
+
+message Public {
+  goproto.test.import_public.sub.M m = 1;
+  goproto.test.import_public.sub.E e = 2;
+  Local local = 3;
 }
diff --git a/protoc-gen-go/testdata/import_public/b.pb.go b/protoc-gen-go/testdata/import_public/b.pb.go
new file mode 100644
index 0000000..427aa4f
--- /dev/null
+++ b/protoc-gen-go/testdata/import_public/b.pb.go
@@ -0,0 +1,87 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: import_public/b.proto
+
+package import_public // import "github.com/golang/protobuf/protoc-gen-go/testdata/import_public"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import sub "github.com/golang/protobuf/protoc-gen-go/testdata/import_public/sub"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type Local struct {
+	M                    *sub.M   `protobuf:"bytes,1,opt,name=m" json:"m,omitempty"`
+	E                    sub.E    `protobuf:"varint,2,opt,name=e,enum=goproto.test.import_public.sub.E" json:"e,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Local) Reset()         { *m = Local{} }
+func (m *Local) String() string { return proto.CompactTextString(m) }
+func (*Local) ProtoMessage()    {}
+func (*Local) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b_7f20a805fad67bd0, []int{0}
+}
+func (m *Local) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Local.Unmarshal(m, b)
+}
+func (m *Local) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Local.Marshal(b, m, deterministic)
+}
+func (dst *Local) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Local.Merge(dst, src)
+}
+func (m *Local) XXX_Size() int {
+	return xxx_messageInfo_Local.Size(m)
+}
+func (m *Local) XXX_DiscardUnknown() {
+	xxx_messageInfo_Local.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Local proto.InternalMessageInfo
+
+func (m *Local) GetM() *sub.M {
+	if m != nil {
+		return m.M
+	}
+	return nil
+}
+
+func (m *Local) GetE() sub.E {
+	if m != nil {
+		return m.E
+	}
+	return sub.E_ZERO
+}
+
+func init() {
+	proto.RegisterType((*Local)(nil), "goproto.test.import_public.Local")
+}
+
+func init() { proto.RegisterFile("import_public/b.proto", fileDescriptor_b_7f20a805fad67bd0) }
+
+var fileDescriptor_b_7f20a805fad67bd0 = []byte{
+	// 174 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0xcd, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x89, 0x2f, 0x28, 0x4d, 0xca, 0xc9, 0x4c, 0xd6, 0x4f, 0xd2, 0x2b, 0x28, 0xca, 0x2f,
+	0xc9, 0x17, 0x92, 0x4a, 0xcf, 0x07, 0x33, 0xf4, 0x4a, 0x52, 0x8b, 0x4b, 0xf4, 0x50, 0xd4, 0x48,
+	0x49, 0xa2, 0x6a, 0x29, 0x2e, 0x4d, 0xd2, 0x4f, 0x84, 0x68, 0x53, 0xca, 0xe4, 0x62, 0xf5, 0xc9,
+	0x4f, 0x4e, 0xcc, 0x11, 0xd2, 0xe7, 0x62, 0xcc, 0x95, 0x60, 0x54, 0x60, 0xd4, 0xe0, 0x36, 0x52,
+	0xd4, 0xc3, 0x6d, 0x96, 0x5e, 0x71, 0x69, 0x92, 0x9e, 0x6f, 0x10, 0x63, 0x2e, 0x48, 0x43, 0xaa,
+	0x04, 0x93, 0x02, 0xa3, 0x06, 0x1f, 0x61, 0x0d, 0xae, 0x41, 0x8c, 0xa9, 0x4e, 0x8e, 0x51, 0xf6,
+	0xe9, 0x99, 0x25, 0x19, 0xa5, 0x49, 0x7a, 0xc9, 0xf9, 0xb9, 0xfa, 0xe9, 0xf9, 0x39, 0x89, 0x79,
+	0xe9, 0xfa, 0x60, 0x6d, 0x49, 0xa5, 0x69, 0x10, 0x46, 0xb2, 0x6e, 0x7a, 0x6a, 0x9e, 0x6e, 0x7a,
+	0xbe, 0x3e, 0xc8, 0x9c, 0x94, 0xc4, 0x92, 0x44, 0x7d, 0x14, 0xb3, 0x92, 0xd8, 0xc0, 0xaa, 0x8c,
+	0x01, 0x01, 0x00, 0x00, 0xff, 0xff, 0xd6, 0x2b, 0x5f, 0x8e, 0x04, 0x01, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp2.proto b/protoc-gen-go/testdata/import_public/b.proto
similarity index 82%
copy from protoc-gen-go/testdata/imp2.proto
copy to protoc-gen-go/testdata/import_public/b.proto
index 3bb0632..1dbca3e 100644
--- a/protoc-gen-go/testdata/imp2.proto
+++ b/protoc-gen-go/testdata/import_public/b.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,15 +29,15 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
+syntax = "proto3";
 
-package imp;
+package goproto.test.import_public;
 
-message PubliclyImportedMessage {
-  optional int64 field = 1;
-}
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/import_public";
 
-enum PubliclyImportedEnum {
-  GLASSES = 1;
-  HAIR = 2;
+import "import_public/sub/a.proto";
+
+message Local {
+  goproto.test.import_public.sub.M m = 1;
+  goproto.test.import_public.sub.E e = 2;
 }
diff --git a/protoc-gen-go/testdata/import_public/sub/a.pb.go b/protoc-gen-go/testdata/import_public/sub/a.pb.go
new file mode 100644
index 0000000..4f8f6d2
--- /dev/null
+++ b/protoc-gen-go/testdata/import_public/sub/a.pb.go
@@ -0,0 +1,100 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: import_public/sub/a.proto
+
+package sub // import "github.com/golang/protobuf/protoc-gen-go/testdata/import_public/sub"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type E int32
+
+const (
+	E_ZERO E = 0
+)
+
+var E_name = map[int32]string{
+	0: "ZERO",
+}
+var E_value = map[string]int32{
+	"ZERO": 0,
+}
+
+func (x E) String() string {
+	return proto.EnumName(E_name, int32(x))
+}
+func (E) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_a_91ca0264a534463a, []int{0}
+}
+
+type M struct {
+	// Field using a type in the same Go package, but a different source file.
+	M2                   *M2      `protobuf:"bytes,1,opt,name=m2" json:"m2,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M) Reset()         { *m = M{} }
+func (m *M) String() string { return proto.CompactTextString(m) }
+func (*M) ProtoMessage()    {}
+func (*M) Descriptor() ([]byte, []int) {
+	return fileDescriptor_a_91ca0264a534463a, []int{0}
+}
+func (m *M) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M.Unmarshal(m, b)
+}
+func (m *M) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M.Marshal(b, m, deterministic)
+}
+func (dst *M) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M.Merge(dst, src)
+}
+func (m *M) XXX_Size() int {
+	return xxx_messageInfo_M.Size(m)
+}
+func (m *M) XXX_DiscardUnknown() {
+	xxx_messageInfo_M.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M proto.InternalMessageInfo
+
+func (m *M) GetM2() *M2 {
+	if m != nil {
+		return m.M2
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*M)(nil), "goproto.test.import_public.sub.M")
+	proto.RegisterEnum("goproto.test.import_public.sub.E", E_name, E_value)
+}
+
+func init() { proto.RegisterFile("import_public/sub/a.proto", fileDescriptor_a_91ca0264a534463a) }
+
+var fileDescriptor_a_91ca0264a534463a = []byte{
+	// 172 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x89, 0x2f, 0x28, 0x4d, 0xca, 0xc9, 0x4c, 0xd6, 0x2f, 0x2e, 0x4d, 0xd2, 0x4f, 0xd4,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x92, 0x4b, 0xcf, 0x07, 0x33, 0xf4, 0x4a, 0x52, 0x8b, 0x4b,
+	0xf4, 0x50, 0xd4, 0xe9, 0x15, 0x97, 0x26, 0x49, 0x61, 0xd1, 0x9a, 0x04, 0xd1, 0xaa, 0x64, 0xce,
+	0xc5, 0xe8, 0x2b, 0x64, 0xc4, 0xc5, 0x94, 0x6b, 0x24, 0xc1, 0xa8, 0xc0, 0xa8, 0xc1, 0x6d, 0xa4,
+	0xa4, 0x87, 0xdf, 0x30, 0x3d, 0x5f, 0xa3, 0x20, 0xa6, 0x5c, 0x23, 0x2d, 0x5e, 0x2e, 0x46, 0x57,
+	0x21, 0x0e, 0x2e, 0x96, 0x28, 0xd7, 0x20, 0x7f, 0x01, 0x06, 0x27, 0xd7, 0x28, 0xe7, 0xf4, 0xcc,
+	0x92, 0x8c, 0xd2, 0x24, 0xbd, 0xe4, 0xfc, 0x5c, 0xfd, 0xf4, 0xfc, 0x9c, 0xc4, 0xbc, 0x74, 0x7d,
+	0xb0, 0x39, 0x49, 0xa5, 0x69, 0x10, 0x46, 0xb2, 0x6e, 0x7a, 0x6a, 0x9e, 0x6e, 0x7a, 0xbe, 0x3e,
+	0xc8, 0xe0, 0x94, 0xc4, 0x92, 0x44, 0x7d, 0x0c, 0x67, 0x25, 0xb1, 0x81, 0x55, 0x1a, 0x03, 0x02,
+	0x00, 0x00, 0xff, 0xff, 0x81, 0xcc, 0x07, 0x7d, 0xed, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp2.proto b/protoc-gen-go/testdata/import_public/sub/a.proto
similarity index 81%
copy from protoc-gen-go/testdata/imp2.proto
copy to protoc-gen-go/testdata/import_public/sub/a.proto
index 3bb0632..4494c81 100644
--- a/protoc-gen-go/testdata/imp2.proto
+++ b/protoc-gen-go/testdata/import_public/sub/a.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,15 +29,19 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
+syntax = "proto3";
 
-package imp;
+package goproto.test.import_public.sub;
 
-message PubliclyImportedMessage {
-  optional int64 field = 1;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/import_public/sub";
+
+import "import_public/sub/b.proto";
+
+message M {
+  // Field using a type in the same Go package, but a different source file.
+  M2 m2 = 1;
 }
 
-enum PubliclyImportedEnum {
-  GLASSES = 1;
-  HAIR = 2;
+enum E {
+  ZERO = 0;
 }
diff --git a/protoc-gen-go/testdata/import_public/sub/b.pb.go b/protoc-gen-go/testdata/import_public/sub/b.pb.go
new file mode 100644
index 0000000..d57a3bb
--- /dev/null
+++ b/protoc-gen-go/testdata/import_public/sub/b.pb.go
@@ -0,0 +1,67 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: import_public/sub/b.proto
+
+package sub // import "github.com/golang/protobuf/protoc-gen-go/testdata/import_public/sub"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type M2 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M2) Reset()         { *m = M2{} }
+func (m *M2) String() string { return proto.CompactTextString(m) }
+func (*M2) ProtoMessage()    {}
+func (*M2) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b_eba25180453d86b4, []int{0}
+}
+func (m *M2) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M2.Unmarshal(m, b)
+}
+func (m *M2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M2.Marshal(b, m, deterministic)
+}
+func (dst *M2) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M2.Merge(dst, src)
+}
+func (m *M2) XXX_Size() int {
+	return xxx_messageInfo_M2.Size(m)
+}
+func (m *M2) XXX_DiscardUnknown() {
+	xxx_messageInfo_M2.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M2 proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*M2)(nil), "goproto.test.import_public.sub.M2")
+}
+
+func init() { proto.RegisterFile("import_public/sub/b.proto", fileDescriptor_b_eba25180453d86b4) }
+
+var fileDescriptor_b_eba25180453d86b4 = []byte{
+	// 127 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x89, 0x2f, 0x28, 0x4d, 0xca, 0xc9, 0x4c, 0xd6, 0x2f, 0x2e, 0x4d, 0xd2, 0x4f, 0xd2,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x92, 0x4b, 0xcf, 0x07, 0x33, 0xf4, 0x4a, 0x52, 0x8b, 0x4b,
+	0xf4, 0x50, 0xd4, 0xe9, 0x15, 0x97, 0x26, 0x29, 0xb1, 0x70, 0x31, 0xf9, 0x1a, 0x39, 0xb9, 0x46,
+	0x39, 0xa7, 0x67, 0x96, 0x64, 0x94, 0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea, 0xa7, 0xe7, 0xe7, 0x24,
+	0xe6, 0xa5, 0xeb, 0x83, 0xf5, 0x25, 0x95, 0xa6, 0x41, 0x18, 0xc9, 0xba, 0xe9, 0xa9, 0x79, 0xba,
+	0xe9, 0xf9, 0xfa, 0x20, 0x83, 0x52, 0x12, 0x4b, 0x12, 0xf5, 0x31, 0x2c, 0x4d, 0x62, 0x03, 0xab,
+	0x34, 0x06, 0x04, 0x00, 0x00, 0xff, 0xff, 0x64, 0x42, 0xe4, 0xa8, 0x90, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp2.proto b/protoc-gen-go/testdata/import_public/sub/b.proto
similarity index 87%
rename from protoc-gen-go/testdata/imp2.proto
rename to protoc-gen-go/testdata/import_public/sub/b.proto
index 3bb0632..c7299e0 100644
--- a/protoc-gen-go/testdata/imp2.proto
+++ b/protoc-gen-go/testdata/import_public/sub/b.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,15 +29,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
+syntax = "proto3";
 
-package imp;
+package goproto.test.import_public.sub;
 
-message PubliclyImportedMessage {
-  optional int64 field = 1;
-}
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/import_public/sub";
 
-enum PubliclyImportedEnum {
-  GLASSES = 1;
-  HAIR = 2;
+message M2 {
 }
diff --git a/protoc-gen-go/testdata/extension_base.proto b/protoc-gen-go/testdata/import_public_test.go
similarity index 71%
copy from protoc-gen-go/testdata/extension_base.proto
copy to protoc-gen-go/testdata/import_public_test.go
index 94acfc1..7ef776b 100644
--- a/protoc-gen-go/testdata/extension_base.proto
+++ b/protoc-gen-go/testdata/import_public_test.go
@@ -29,18 +29,38 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
+// +build go1.9
 
-package extension_base;
+package testdata
 
-message BaseMessage {
-  optional int32 height = 1;
-  extensions 4 to 9;
-  extensions 16 to max;
-}
+import (
+	"testing"
 
-// Another message that may be extended, using message_set_wire_format.
-message OldStyleMessage {
-  option message_set_wire_format = true;
-  extensions 100 to max;
+	mainpb "github.com/golang/protobuf/protoc-gen-go/testdata/import_public"
+	subpb "github.com/golang/protobuf/protoc-gen-go/testdata/import_public/sub"
+)
+
+func TestImportPublicLink(t *testing.T) {
+	// mainpb.[ME] should be interchangable with subpb.[ME].
+	var _ mainpb.M = subpb.M{}
+	var _ mainpb.E = subpb.E(0)
+	_ = &mainpb.Public{
+		M: &mainpb.M{},
+		E: mainpb.E_ZERO,
+		Local: &mainpb.Local{
+			M: &mainpb.M{},
+			E: mainpb.E_ZERO,
+		},
+	}
+	_ = &mainpb.Public{
+		M: &subpb.M{},
+		E: subpb.E_ZERO,
+		Local: &mainpb.Local{
+			M: &subpb.M{},
+			E: subpb.E_ZERO,
+		},
+	}
+	_ = &mainpb.M{
+		M2: &subpb.M2{},
+	}
 }
diff --git a/protoc-gen-go/testdata/imports/fmt/m.pb.go b/protoc-gen-go/testdata/imports/fmt/m.pb.go
new file mode 100644
index 0000000..ca312d6
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/fmt/m.pb.go
@@ -0,0 +1,66 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/fmt/m.proto
+
+package fmt // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports/fmt"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type M struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M) Reset()         { *m = M{} }
+func (m *M) String() string { return proto.CompactTextString(m) }
+func (*M) ProtoMessage()    {}
+func (*M) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m_867dd34c461422b8, []int{0}
+}
+func (m *M) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M.Unmarshal(m, b)
+}
+func (m *M) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M.Marshal(b, m, deterministic)
+}
+func (dst *M) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M.Merge(dst, src)
+}
+func (m *M) XXX_Size() int {
+	return xxx_messageInfo_M.Size(m)
+}
+func (m *M) XXX_DiscardUnknown() {
+	xxx_messageInfo_M.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*M)(nil), "fmt.M")
+}
+
+func init() { proto.RegisterFile("imports/fmt/m.proto", fileDescriptor_m_867dd34c461422b8) }
+
+var fileDescriptor_m_867dd34c461422b8 = []byte{
+	// 109 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0xce, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x4f, 0xcb, 0x2d, 0xd1, 0xcf, 0xd5, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17,
+	0x62, 0x4e, 0xcb, 0x2d, 0x51, 0x62, 0xe6, 0x62, 0xf4, 0x75, 0xb2, 0x8f, 0xb2, 0x4d, 0xcf, 0x2c,
+	0xc9, 0x28, 0x4d, 0xd2, 0x4b, 0xce, 0xcf, 0xd5, 0x4f, 0xcf, 0xcf, 0x49, 0xcc, 0x4b, 0xd7, 0x07,
+	0x2b, 0x4a, 0x2a, 0x4d, 0x83, 0x30, 0x92, 0x75, 0xd3, 0x53, 0xf3, 0x74, 0xd3, 0xf3, 0xf5, 0x4b,
+	0x52, 0x8b, 0x4b, 0x52, 0x12, 0x4b, 0x12, 0xf5, 0x91, 0x8c, 0x4c, 0x62, 0x03, 0xab, 0x31, 0x06,
+	0x04, 0x00, 0x00, 0xff, 0xff, 0xc4, 0xc9, 0xee, 0xbe, 0x68, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp3.proto b/protoc-gen-go/testdata/imports/fmt/m.proto
similarity index 89%
rename from protoc-gen-go/testdata/imp3.proto
rename to protoc-gen-go/testdata/imports/fmt/m.proto
index 58fc759..142d8cf 100644
--- a/protoc-gen-go/testdata/imp3.proto
+++ b/protoc-gen-go/testdata/imports/fmt/m.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,10 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
-
-package imp;
-
-message ForeignImportedMessage {
-  optional string tuber = 1;
-}
+syntax = "proto3";
+package fmt;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports/fmt";
+message M {}
diff --git a/protoc-gen-go/testdata/imports/test_a_1/m1.pb.go b/protoc-gen-go/testdata/imports/test_a_1/m1.pb.go
new file mode 100644
index 0000000..82ec35e
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_a_1/m1.pb.go
@@ -0,0 +1,130 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_a_1/m1.proto
+
+package test_a_1 // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_1"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type E1 int32
+
+const (
+	E1_E1_ZERO E1 = 0
+)
+
+var E1_name = map[int32]string{
+	0: "E1_ZERO",
+}
+var E1_value = map[string]int32{
+	"E1_ZERO": 0,
+}
+
+func (x E1) String() string {
+	return proto.EnumName(E1_name, int32(x))
+}
+func (E1) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_m1_56a2598431d21e61, []int{0}
+}
+
+type M1 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M1) Reset()         { *m = M1{} }
+func (m *M1) String() string { return proto.CompactTextString(m) }
+func (*M1) ProtoMessage()    {}
+func (*M1) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m1_56a2598431d21e61, []int{0}
+}
+func (m *M1) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M1.Unmarshal(m, b)
+}
+func (m *M1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M1.Marshal(b, m, deterministic)
+}
+func (dst *M1) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M1.Merge(dst, src)
+}
+func (m *M1) XXX_Size() int {
+	return xxx_messageInfo_M1.Size(m)
+}
+func (m *M1) XXX_DiscardUnknown() {
+	xxx_messageInfo_M1.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M1 proto.InternalMessageInfo
+
+type M1_1 struct {
+	M1                   *M1      `protobuf:"bytes,1,opt,name=m1" json:"m1,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M1_1) Reset()         { *m = M1_1{} }
+func (m *M1_1) String() string { return proto.CompactTextString(m) }
+func (*M1_1) ProtoMessage()    {}
+func (*M1_1) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m1_56a2598431d21e61, []int{1}
+}
+func (m *M1_1) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M1_1.Unmarshal(m, b)
+}
+func (m *M1_1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M1_1.Marshal(b, m, deterministic)
+}
+func (dst *M1_1) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M1_1.Merge(dst, src)
+}
+func (m *M1_1) XXX_Size() int {
+	return xxx_messageInfo_M1_1.Size(m)
+}
+func (m *M1_1) XXX_DiscardUnknown() {
+	xxx_messageInfo_M1_1.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M1_1 proto.InternalMessageInfo
+
+func (m *M1_1) GetM1() *M1 {
+	if m != nil {
+		return m.M1
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*M1)(nil), "test.a.M1")
+	proto.RegisterType((*M1_1)(nil), "test.a.M1_1")
+	proto.RegisterEnum("test.a.E1", E1_name, E1_value)
+}
+
+func init() { proto.RegisterFile("imports/test_a_1/m1.proto", fileDescriptor_m1_56a2598431d21e61) }
+
+var fileDescriptor_m1_56a2598431d21e61 = []byte{
+	// 165 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x4f, 0x8c, 0x37, 0xd4, 0xcf, 0x35, 0xd4,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0x03, 0x09, 0xe9, 0x25, 0x2a, 0xb1, 0x70, 0x31, 0xf9,
+	0x1a, 0x2a, 0x29, 0x71, 0xb1, 0xf8, 0x1a, 0xc6, 0x1b, 0x0a, 0x49, 0x71, 0x31, 0xe5, 0x1a, 0x4a,
+	0x30, 0x2a, 0x30, 0x6a, 0x70, 0x1b, 0x71, 0xe9, 0x41, 0x94, 0xe8, 0xf9, 0x1a, 0x06, 0x31, 0xe5,
+	0x1a, 0x6a, 0x09, 0x72, 0x31, 0xb9, 0x1a, 0x0a, 0x71, 0x73, 0xb1, 0xbb, 0x1a, 0xc6, 0x47, 0xb9,
+	0x06, 0xf9, 0x0b, 0x30, 0x38, 0xb9, 0x44, 0x39, 0xa5, 0x67, 0x96, 0x64, 0x94, 0x26, 0xe9, 0x25,
+	0xe7, 0xe7, 0xea, 0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5, 0xeb, 0x83, 0xcd, 0x4f, 0x2a, 0x4d, 0x83,
+	0x30, 0x92, 0x75, 0xd3, 0x53, 0xf3, 0x74, 0xd3, 0xf3, 0xc1, 0x4e, 0x48, 0x49, 0x2c, 0x49, 0xd4,
+	0x47, 0x77, 0x53, 0x12, 0x1b, 0x58, 0xa1, 0x31, 0x20, 0x00, 0x00, 0xff, 0xff, 0xcc, 0xae, 0xc9,
+	0xcd, 0xae, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp2.proto b/protoc-gen-go/testdata/imports/test_a_1/m1.proto
similarity index 86%
copy from protoc-gen-go/testdata/imp2.proto
copy to protoc-gen-go/testdata/imports/test_a_1/m1.proto
index 3bb0632..da54c1e 100644
--- a/protoc-gen-go/testdata/imp2.proto
+++ b/protoc-gen-go/testdata/imports/test_a_1/m1.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,15 +29,16 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
+syntax = "proto3";
+package test.a;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_1";
 
-package imp;
+message M1 {}
 
-message PubliclyImportedMessage {
-  optional int64 field = 1;
+message M1_1 {
+  M1 m1 = 1;
 }
 
-enum PubliclyImportedEnum {
-  GLASSES = 1;
-  HAIR = 2;
+enum E1 {
+  E1_ZERO = 0;
 }
diff --git a/protoc-gen-go/testdata/imports/test_a_1/m2.pb.go b/protoc-gen-go/testdata/imports/test_a_1/m2.pb.go
new file mode 100644
index 0000000..1b629bf
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_a_1/m2.pb.go
@@ -0,0 +1,67 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_a_1/m2.proto
+
+package test_a_1 // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_1"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type M2 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M2) Reset()         { *m = M2{} }
+func (m *M2) String() string { return proto.CompactTextString(m) }
+func (*M2) ProtoMessage()    {}
+func (*M2) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m2_ccd6356c045a9ac3, []int{0}
+}
+func (m *M2) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M2.Unmarshal(m, b)
+}
+func (m *M2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M2.Marshal(b, m, deterministic)
+}
+func (dst *M2) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M2.Merge(dst, src)
+}
+func (m *M2) XXX_Size() int {
+	return xxx_messageInfo_M2.Size(m)
+}
+func (m *M2) XXX_DiscardUnknown() {
+	xxx_messageInfo_M2.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M2 proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*M2)(nil), "test.a.M2")
+}
+
+func init() { proto.RegisterFile("imports/test_a_1/m2.proto", fileDescriptor_m2_ccd6356c045a9ac3) }
+
+var fileDescriptor_m2_ccd6356c045a9ac3 = []byte{
+	// 114 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x4f, 0x8c, 0x37, 0xd4, 0xcf, 0x35, 0xd2,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0x03, 0x09, 0xe9, 0x25, 0x2a, 0xb1, 0x70, 0x31, 0xf9,
+	0x1a, 0x39, 0xb9, 0x44, 0x39, 0xa5, 0x67, 0x96, 0x64, 0x94, 0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea,
+	0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5, 0xeb, 0x83, 0x15, 0x26, 0x95, 0xa6, 0x41, 0x18, 0xc9, 0xba,
+	0xe9, 0xa9, 0x79, 0xba, 0xe9, 0xf9, 0x60, 0xb3, 0x52, 0x12, 0x4b, 0x12, 0xf5, 0xd1, 0x0d, 0x4f,
+	0x62, 0x03, 0x2b, 0x34, 0x06, 0x04, 0x00, 0x00, 0xff, 0xff, 0xe3, 0xe0, 0x7e, 0xc0, 0x77, 0x00,
+	0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp3.proto b/protoc-gen-go/testdata/imports/test_a_1/m2.proto
similarity index 88%
copy from protoc-gen-go/testdata/imp3.proto
copy to protoc-gen-go/testdata/imports/test_a_1/m2.proto
index 58fc759..49499dc 100644
--- a/protoc-gen-go/testdata/imp3.proto
+++ b/protoc-gen-go/testdata/imports/test_a_1/m2.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,10 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
-
-package imp;
-
-message ForeignImportedMessage {
-  optional string tuber = 1;
-}
+syntax = "proto3";
+package test.a;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_1";
+message M2 {}
diff --git a/protoc-gen-go/testdata/imports/test_a_2/m3.pb.go b/protoc-gen-go/testdata/imports/test_a_2/m3.pb.go
new file mode 100644
index 0000000..e3895d2
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_a_2/m3.pb.go
@@ -0,0 +1,67 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_a_2/m3.proto
+
+package test_a_2 // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_2"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type M3 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M3) Reset()         { *m = M3{} }
+func (m *M3) String() string { return proto.CompactTextString(m) }
+func (*M3) ProtoMessage()    {}
+func (*M3) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m3_de310e87d08d4216, []int{0}
+}
+func (m *M3) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M3.Unmarshal(m, b)
+}
+func (m *M3) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M3.Marshal(b, m, deterministic)
+}
+func (dst *M3) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M3.Merge(dst, src)
+}
+func (m *M3) XXX_Size() int {
+	return xxx_messageInfo_M3.Size(m)
+}
+func (m *M3) XXX_DiscardUnknown() {
+	xxx_messageInfo_M3.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M3 proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*M3)(nil), "test.a.M3")
+}
+
+func init() { proto.RegisterFile("imports/test_a_2/m3.proto", fileDescriptor_m3_de310e87d08d4216) }
+
+var fileDescriptor_m3_de310e87d08d4216 = []byte{
+	// 114 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x4f, 0x8c, 0x37, 0xd2, 0xcf, 0x35, 0xd6,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0x03, 0x09, 0xe9, 0x25, 0x2a, 0xb1, 0x70, 0x31, 0xf9,
+	0x1a, 0x3b, 0xb9, 0x44, 0x39, 0xa5, 0x67, 0x96, 0x64, 0x94, 0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea,
+	0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5, 0xeb, 0x83, 0x15, 0x26, 0x95, 0xa6, 0x41, 0x18, 0xc9, 0xba,
+	0xe9, 0xa9, 0x79, 0xba, 0xe9, 0xf9, 0x60, 0xb3, 0x52, 0x12, 0x4b, 0x12, 0xf5, 0xd1, 0x0d, 0x4f,
+	0x62, 0x03, 0x2b, 0x34, 0x06, 0x04, 0x00, 0x00, 0xff, 0xff, 0x23, 0x86, 0x27, 0x47, 0x77, 0x00,
+	0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp3.proto b/protoc-gen-go/testdata/imports/test_a_2/m3.proto
similarity index 88%
copy from protoc-gen-go/testdata/imp3.proto
copy to protoc-gen-go/testdata/imports/test_a_2/m3.proto
index 58fc759..5e811ef 100644
--- a/protoc-gen-go/testdata/imp3.proto
+++ b/protoc-gen-go/testdata/imports/test_a_2/m3.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,10 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
-
-package imp;
-
-message ForeignImportedMessage {
-  optional string tuber = 1;
-}
+syntax = "proto3";
+package test.a;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_2";
+message M3 {}
diff --git a/protoc-gen-go/testdata/imports/test_a_2/m4.pb.go b/protoc-gen-go/testdata/imports/test_a_2/m4.pb.go
new file mode 100644
index 0000000..65a3bad
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_a_2/m4.pb.go
@@ -0,0 +1,67 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_a_2/m4.proto
+
+package test_a_2 // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_2"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type M4 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M4) Reset()         { *m = M4{} }
+func (m *M4) String() string { return proto.CompactTextString(m) }
+func (*M4) ProtoMessage()    {}
+func (*M4) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m4_da12b386229f3791, []int{0}
+}
+func (m *M4) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M4.Unmarshal(m, b)
+}
+func (m *M4) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M4.Marshal(b, m, deterministic)
+}
+func (dst *M4) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M4.Merge(dst, src)
+}
+func (m *M4) XXX_Size() int {
+	return xxx_messageInfo_M4.Size(m)
+}
+func (m *M4) XXX_DiscardUnknown() {
+	xxx_messageInfo_M4.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M4 proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*M4)(nil), "test.a.M4")
+}
+
+func init() { proto.RegisterFile("imports/test_a_2/m4.proto", fileDescriptor_m4_da12b386229f3791) }
+
+var fileDescriptor_m4_da12b386229f3791 = []byte{
+	// 114 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x4f, 0x8c, 0x37, 0xd2, 0xcf, 0x35, 0xd1,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0x62, 0x03, 0x09, 0xe9, 0x25, 0x2a, 0xb1, 0x70, 0x31, 0xf9,
+	0x9a, 0x38, 0xb9, 0x44, 0x39, 0xa5, 0x67, 0x96, 0x64, 0x94, 0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea,
+	0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5, 0xeb, 0x83, 0x15, 0x26, 0x95, 0xa6, 0x41, 0x18, 0xc9, 0xba,
+	0xe9, 0xa9, 0x79, 0xba, 0xe9, 0xf9, 0x60, 0xb3, 0x52, 0x12, 0x4b, 0x12, 0xf5, 0xd1, 0x0d, 0x4f,
+	0x62, 0x03, 0x2b, 0x34, 0x06, 0x04, 0x00, 0x00, 0xff, 0xff, 0x58, 0xcb, 0x10, 0xc8, 0x77, 0x00,
+	0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp3.proto b/protoc-gen-go/testdata/imports/test_a_2/m4.proto
similarity index 88%
copy from protoc-gen-go/testdata/imp3.proto
copy to protoc-gen-go/testdata/imports/test_a_2/m4.proto
index 58fc759..8f8fe3e 100644
--- a/protoc-gen-go/testdata/imp3.proto
+++ b/protoc-gen-go/testdata/imports/test_a_2/m4.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,10 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
-
-package imp;
-
-message ForeignImportedMessage {
-  optional string tuber = 1;
-}
+syntax = "proto3";
+package test.a;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_2";
+message M4 {}
diff --git a/protoc-gen-go/testdata/imports/test_b_1/m1.pb.go b/protoc-gen-go/testdata/imports/test_b_1/m1.pb.go
new file mode 100644
index 0000000..831f414
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_b_1/m1.pb.go
@@ -0,0 +1,67 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_b_1/m1.proto
+
+package beta // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_b_1"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type M1 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M1) Reset()         { *m = M1{} }
+func (m *M1) String() string { return proto.CompactTextString(m) }
+func (*M1) ProtoMessage()    {}
+func (*M1) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m1_aff127b054aec649, []int{0}
+}
+func (m *M1) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M1.Unmarshal(m, b)
+}
+func (m *M1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M1.Marshal(b, m, deterministic)
+}
+func (dst *M1) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M1.Merge(dst, src)
+}
+func (m *M1) XXX_Size() int {
+	return xxx_messageInfo_M1.Size(m)
+}
+func (m *M1) XXX_DiscardUnknown() {
+	xxx_messageInfo_M1.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M1 proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*M1)(nil), "test.b.part1.M1")
+}
+
+func init() { proto.RegisterFile("imports/test_b_1/m1.proto", fileDescriptor_m1_aff127b054aec649) }
+
+var fileDescriptor_m1_aff127b054aec649 = []byte{
+	// 125 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x4f, 0x8a, 0x37, 0xd4, 0xcf, 0x35, 0xd4,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x01, 0x09, 0xe9, 0x25, 0xe9, 0x15, 0x24, 0x16, 0x95,
+	0x18, 0x2a, 0xb1, 0x70, 0x31, 0xf9, 0x1a, 0x3a, 0x79, 0x46, 0xb9, 0xa7, 0x67, 0x96, 0x64, 0x94,
+	0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea, 0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5, 0xeb, 0x83, 0x95, 0x27,
+	0x95, 0xa6, 0x41, 0x18, 0xc9, 0xba, 0xe9, 0xa9, 0x79, 0xba, 0xe9, 0xf9, 0x60, 0x13, 0x53, 0x12,
+	0x4b, 0x12, 0xf5, 0xd1, 0xad, 0xb0, 0x4e, 0x4a, 0x2d, 0x49, 0x4c, 0x62, 0x03, 0xab, 0x36, 0x06,
+	0x04, 0x00, 0x00, 0xff, 0xff, 0x4a, 0xf1, 0x3b, 0x7f, 0x82, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp3.proto b/protoc-gen-go/testdata/imports/test_b_1/m1.proto
similarity index 88%
copy from protoc-gen-go/testdata/imp3.proto
copy to protoc-gen-go/testdata/imports/test_b_1/m1.proto
index 58fc759..2c35ec4 100644
--- a/protoc-gen-go/testdata/imp3.proto
+++ b/protoc-gen-go/testdata/imports/test_b_1/m1.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,10 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
-
-package imp;
-
-message ForeignImportedMessage {
-  optional string tuber = 1;
-}
+syntax = "proto3";
+package test.b.part1;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_b_1;beta";
+message M1 {}
diff --git a/protoc-gen-go/testdata/imports/test_b_1/m2.pb.go b/protoc-gen-go/testdata/imports/test_b_1/m2.pb.go
new file mode 100644
index 0000000..bc74105
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_b_1/m2.pb.go
@@ -0,0 +1,67 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_b_1/m2.proto
+
+package beta // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_b_1"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type M2 struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *M2) Reset()         { *m = M2{} }
+func (m *M2) String() string { return proto.CompactTextString(m) }
+func (*M2) ProtoMessage()    {}
+func (*M2) Descriptor() ([]byte, []int) {
+	return fileDescriptor_m2_0c59cab35ba1b0d8, []int{0}
+}
+func (m *M2) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_M2.Unmarshal(m, b)
+}
+func (m *M2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_M2.Marshal(b, m, deterministic)
+}
+func (dst *M2) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_M2.Merge(dst, src)
+}
+func (m *M2) XXX_Size() int {
+	return xxx_messageInfo_M2.Size(m)
+}
+func (m *M2) XXX_DiscardUnknown() {
+	xxx_messageInfo_M2.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_M2 proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*M2)(nil), "test.b.part2.M2")
+}
+
+func init() { proto.RegisterFile("imports/test_b_1/m2.proto", fileDescriptor_m2_0c59cab35ba1b0d8) }
+
+var fileDescriptor_m2_0c59cab35ba1b0d8 = []byte{
+	// 125 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcc, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x4f, 0x8a, 0x37, 0xd4, 0xcf, 0x35, 0xd2,
+	0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x01, 0x09, 0xe9, 0x25, 0xe9, 0x15, 0x24, 0x16, 0x95,
+	0x18, 0x29, 0xb1, 0x70, 0x31, 0xf9, 0x1a, 0x39, 0x79, 0x46, 0xb9, 0xa7, 0x67, 0x96, 0x64, 0x94,
+	0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea, 0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5, 0xeb, 0x83, 0x95, 0x27,
+	0x95, 0xa6, 0x41, 0x18, 0xc9, 0xba, 0xe9, 0xa9, 0x79, 0xba, 0xe9, 0xf9, 0x60, 0x13, 0x53, 0x12,
+	0x4b, 0x12, 0xf5, 0xd1, 0xad, 0xb0, 0x4e, 0x4a, 0x2d, 0x49, 0x4c, 0x62, 0x03, 0xab, 0x36, 0x06,
+	0x04, 0x00, 0x00, 0xff, 0xff, 0x44, 0x29, 0xbe, 0x6d, 0x82, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp3.proto b/protoc-gen-go/testdata/imports/test_b_1/m2.proto
similarity index 88%
copy from protoc-gen-go/testdata/imp3.proto
copy to protoc-gen-go/testdata/imports/test_b_1/m2.proto
index 58fc759..13723be 100644
--- a/protoc-gen-go/testdata/imp3.proto
+++ b/protoc-gen-go/testdata/imports/test_b_1/m2.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,10 +29,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
-
-package imp;
-
-message ForeignImportedMessage {
-  optional string tuber = 1;
-}
+syntax = "proto3";
+package test.b.part2;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_b_1;beta";
+message M2 {}
diff --git a/protoc-gen-go/testdata/imports/test_import_a1m1.pb.go b/protoc-gen-go/testdata/imports/test_import_a1m1.pb.go
new file mode 100644
index 0000000..72daffd
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_import_a1m1.pb.go
@@ -0,0 +1,80 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_import_a1m1.proto
+
+package imports // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import test_a_1 "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_1"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type A1M1 struct {
+	F                    *test_a_1.M1 `protobuf:"bytes,1,opt,name=f" json:"f,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
+}
+
+func (m *A1M1) Reset()         { *m = A1M1{} }
+func (m *A1M1) String() string { return proto.CompactTextString(m) }
+func (*A1M1) ProtoMessage()    {}
+func (*A1M1) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_import_a1m1_d7f2b5c638a69f6e, []int{0}
+}
+func (m *A1M1) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_A1M1.Unmarshal(m, b)
+}
+func (m *A1M1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_A1M1.Marshal(b, m, deterministic)
+}
+func (dst *A1M1) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_A1M1.Merge(dst, src)
+}
+func (m *A1M1) XXX_Size() int {
+	return xxx_messageInfo_A1M1.Size(m)
+}
+func (m *A1M1) XXX_DiscardUnknown() {
+	xxx_messageInfo_A1M1.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_A1M1 proto.InternalMessageInfo
+
+func (m *A1M1) GetF() *test_a_1.M1 {
+	if m != nil {
+		return m.F
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*A1M1)(nil), "test.A1M1")
+}
+
+func init() {
+	proto.RegisterFile("imports/test_import_a1m1.proto", fileDescriptor_test_import_a1m1_d7f2b5c638a69f6e)
+}
+
+var fileDescriptor_test_import_a1m1_d7f2b5c638a69f6e = []byte{
+	// 149 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcb, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x87, 0x70, 0xe2, 0x13, 0x0d, 0x73, 0x0d,
+	0xf5, 0x0a, 0x8a, 0xf2, 0x4b, 0xf2, 0x85, 0x58, 0x40, 0xe2, 0x52, 0x92, 0x28, 0xaa, 0x12, 0xe3,
+	0x0d, 0xf5, 0x61, 0x0a, 0x94, 0x14, 0xb8, 0x58, 0x1c, 0x0d, 0x7d, 0x0d, 0x85, 0x24, 0xb8, 0x18,
+	0xd3, 0x24, 0x18, 0x15, 0x18, 0x35, 0xb8, 0x8d, 0xb8, 0xf4, 0x40, 0xca, 0xf4, 0x12, 0xf5, 0x7c,
+	0x0d, 0x83, 0x18, 0xd3, 0x9c, 0xac, 0xa3, 0x2c, 0xd3, 0x33, 0x4b, 0x32, 0x4a, 0x93, 0xf4, 0x92,
+	0xf3, 0x73, 0xf5, 0xd3, 0xf3, 0x73, 0x12, 0xf3, 0xd2, 0xf5, 0xc1, 0x9a, 0x93, 0x4a, 0xd3, 0x20,
+	0x8c, 0x64, 0xdd, 0xf4, 0xd4, 0x3c, 0xdd, 0xf4, 0x7c, 0xb0, 0xf9, 0x29, 0x89, 0x25, 0x89, 0xfa,
+	0x50, 0x0b, 0x93, 0xd8, 0xc0, 0xf2, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0x84, 0x2f, 0x18,
+	0x23, 0xa8, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp2.proto b/protoc-gen-go/testdata/imports/test_import_a1m1.proto
similarity index 86%
copy from protoc-gen-go/testdata/imp2.proto
copy to protoc-gen-go/testdata/imports/test_import_a1m1.proto
index 3bb0632..abf07f2 100644
--- a/protoc-gen-go/testdata/imp2.proto
+++ b/protoc-gen-go/testdata/imports/test_import_a1m1.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,15 +29,14 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
+syntax = "proto3";
 
-package imp;
+package test;
 
-message PubliclyImportedMessage {
-  optional int64 field = 1;
-}
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports";
 
-enum PubliclyImportedEnum {
-  GLASSES = 1;
-  HAIR = 2;
+import "imports/test_a_1/m1.proto";
+
+message A1M1 {
+  test.a.M1 f = 1;
 }
diff --git a/protoc-gen-go/testdata/imports/test_import_a1m2.pb.go b/protoc-gen-go/testdata/imports/test_import_a1m2.pb.go
new file mode 100644
index 0000000..9e36ebd
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_import_a1m2.pb.go
@@ -0,0 +1,80 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_import_a1m2.proto
+
+package imports // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import test_a_1 "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_1"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type A1M2 struct {
+	F                    *test_a_1.M2 `protobuf:"bytes,1,opt,name=f" json:"f,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
+}
+
+func (m *A1M2) Reset()         { *m = A1M2{} }
+func (m *A1M2) String() string { return proto.CompactTextString(m) }
+func (*A1M2) ProtoMessage()    {}
+func (*A1M2) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_import_a1m2_9a3281ce9464e116, []int{0}
+}
+func (m *A1M2) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_A1M2.Unmarshal(m, b)
+}
+func (m *A1M2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_A1M2.Marshal(b, m, deterministic)
+}
+func (dst *A1M2) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_A1M2.Merge(dst, src)
+}
+func (m *A1M2) XXX_Size() int {
+	return xxx_messageInfo_A1M2.Size(m)
+}
+func (m *A1M2) XXX_DiscardUnknown() {
+	xxx_messageInfo_A1M2.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_A1M2 proto.InternalMessageInfo
+
+func (m *A1M2) GetF() *test_a_1.M2 {
+	if m != nil {
+		return m.F
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*A1M2)(nil), "test.A1M2")
+}
+
+func init() {
+	proto.RegisterFile("imports/test_import_a1m2.proto", fileDescriptor_test_import_a1m2_9a3281ce9464e116)
+}
+
+var fileDescriptor_test_import_a1m2_9a3281ce9464e116 = []byte{
+	// 149 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0xcb, 0xcc, 0x2d, 0xc8,
+	0x2f, 0x2a, 0x29, 0xd6, 0x2f, 0x49, 0x2d, 0x2e, 0x89, 0x87, 0x70, 0xe2, 0x13, 0x0d, 0x73, 0x8d,
+	0xf4, 0x0a, 0x8a, 0xf2, 0x4b, 0xf2, 0x85, 0x58, 0x40, 0xe2, 0x52, 0x92, 0x28, 0xaa, 0x12, 0xe3,
+	0x0d, 0xf5, 0x61, 0x0a, 0x94, 0x14, 0xb8, 0x58, 0x1c, 0x0d, 0x7d, 0x8d, 0x84, 0x24, 0xb8, 0x18,
+	0xd3, 0x24, 0x18, 0x15, 0x18, 0x35, 0xb8, 0x8d, 0xb8, 0xf4, 0x40, 0xca, 0xf4, 0x12, 0xf5, 0x7c,
+	0x8d, 0x82, 0x18, 0xd3, 0x9c, 0xac, 0xa3, 0x2c, 0xd3, 0x33, 0x4b, 0x32, 0x4a, 0x93, 0xf4, 0x92,
+	0xf3, 0x73, 0xf5, 0xd3, 0xf3, 0x73, 0x12, 0xf3, 0xd2, 0xf5, 0xc1, 0x9a, 0x93, 0x4a, 0xd3, 0x20,
+	0x8c, 0x64, 0xdd, 0xf4, 0xd4, 0x3c, 0xdd, 0xf4, 0x7c, 0xb0, 0xf9, 0x29, 0x89, 0x25, 0x89, 0xfa,
+	0x50, 0x0b, 0x93, 0xd8, 0xc0, 0xf2, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0x1f, 0x88, 0xfb,
+	0xea, 0xa8, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/imp2.proto b/protoc-gen-go/testdata/imports/test_import_a1m2.proto
similarity index 86%
copy from protoc-gen-go/testdata/imp2.proto
copy to protoc-gen-go/testdata/imports/test_import_a1m2.proto
index 3bb0632..5c53950 100644
--- a/protoc-gen-go/testdata/imp2.proto
+++ b/protoc-gen-go/testdata/imports/test_import_a1m2.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2011 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -29,15 +29,14 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto2";
+syntax = "proto3";
 
-package imp;
+package test;
 
-message PubliclyImportedMessage {
-  optional int64 field = 1;
-}
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports";
 
-enum PubliclyImportedEnum {
-  GLASSES = 1;
-  HAIR = 2;
+import "imports/test_a_1/m2.proto";
+
+message A1M2 {
+  test.a.M2 f = 1;
 }
diff --git a/protoc-gen-go/testdata/imports/test_import_all.pb.go b/protoc-gen-go/testdata/imports/test_import_all.pb.go
new file mode 100644
index 0000000..f40e0b7
--- /dev/null
+++ b/protoc-gen-go/testdata/imports/test_import_all.pb.go
@@ -0,0 +1,138 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: imports/test_import_all.proto
+
+package imports // import "github.com/golang/protobuf/protoc-gen-go/testdata/imports"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import fmt1 "github.com/golang/protobuf/protoc-gen-go/testdata/imports/fmt"
+import test_a_1 "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_1"
+import test_a_2 "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_a_2"
+import test_b_1 "github.com/golang/protobuf/protoc-gen-go/testdata/imports/test_b_1"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type All struct {
+	Am1                  *test_a_1.M1 `protobuf:"bytes,1,opt,name=am1" json:"am1,omitempty"`
+	Am2                  *test_a_1.M2 `protobuf:"bytes,2,opt,name=am2" json:"am2,omitempty"`
+	Am3                  *test_a_2.M3 `protobuf:"bytes,3,opt,name=am3" json:"am3,omitempty"`
+	Am4                  *test_a_2.M4 `protobuf:"bytes,4,opt,name=am4" json:"am4,omitempty"`
+	Bm1                  *test_b_1.M1 `protobuf:"bytes,5,opt,name=bm1" json:"bm1,omitempty"`
+	Bm2                  *test_b_1.M2 `protobuf:"bytes,6,opt,name=bm2" json:"bm2,omitempty"`
+	Fmt                  *fmt1.M      `protobuf:"bytes,7,opt,name=fmt" json:"fmt,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
+}
+
+func (m *All) Reset()         { *m = All{} }
+func (m *All) String() string { return proto.CompactTextString(m) }
+func (*All) ProtoMessage()    {}
+func (*All) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_import_all_b41dc4592e4a4f3b, []int{0}
+}
+func (m *All) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_All.Unmarshal(m, b)
+}
+func (m *All) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_All.Marshal(b, m, deterministic)
+}
+func (dst *All) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_All.Merge(dst, src)
+}
+func (m *All) XXX_Size() int {
+	return xxx_messageInfo_All.Size(m)
+}
+func (m *All) XXX_DiscardUnknown() {
+	xxx_messageInfo_All.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_All proto.InternalMessageInfo
+
+func (m *All) GetAm1() *test_a_1.M1 {
+	if m != nil {
+		return m.Am1
+	}
+	return nil
+}
+
+func (m *All) GetAm2() *test_a_1.M2 {
+	if m != nil {
+		return m.Am2
+	}
+	return nil
+}
+
+func (m *All) GetAm3() *test_a_2.M3 {
+	if m != nil {
+		return m.Am3
+	}
+	return nil
+}
+
+func (m *All) GetAm4() *test_a_2.M4 {
+	if m != nil {
+		return m.Am4
+	}
+	return nil
+}
+
+func (m *All) GetBm1() *test_b_1.M1 {
+	if m != nil {
+		return m.Bm1
+	}
+	return nil
+}
+
+func (m *All) GetBm2() *test_b_1.M2 {
+	if m != nil {
+		return m.Bm2
+	}
+	return nil
+}
+
+func (m *All) GetFmt() *fmt1.M {
+	if m != nil {
+		return m.Fmt
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*All)(nil), "test.All")
+}
+
+func init() {
+	proto.RegisterFile("imports/test_import_all.proto", fileDescriptor_test_import_all_b41dc4592e4a4f3b)
+}
+
+var fileDescriptor_test_import_all_b41dc4592e4a4f3b = []byte{
+	// 258 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0xd0, 0xb1, 0x4e, 0xc3, 0x30,
+	0x10, 0x06, 0x60, 0x15, 0x97, 0x20, 0x99, 0x05, 0x85, 0xc5, 0x20, 0x90, 0x50, 0x27, 0x96, 0xda,
+	0xb2, 0x9d, 0x05, 0x31, 0xc1, 0xde, 0xa5, 0x23, 0x4b, 0x64, 0x97, 0xc6, 0x54, 0xf2, 0xd5, 0x51,
+	0x7a, 0x7d, 0x5e, 0x5e, 0x05, 0xd9, 0x07, 0x12, 0x84, 0x66, 0x4b, 0xfe, 0xef, 0xb7, 0xce, 0x3e,
+	0x7e, 0xbf, 0x83, 0x3e, 0x0d, 0x78, 0x50, 0xb8, 0x3d, 0x60, 0x4b, 0x3f, 0xad, 0x8b, 0x51, 0xf6,
+	0x43, 0xc2, 0x54, 0xcf, 0x73, 0x7c, 0x7b, 0xf3, 0xa7, 0xe4, 0x5a, 0xad, 0x40, 0x53, 0xe1, 0x14,
+	0x99, 0x09, 0x32, 0x0a, 0xec, 0x34, 0x35, 0x27, 0xc9, 0x4f, 0xcf, 0xf2, 0xbf, 0x67, 0x5d, 0xff,
+	0x50, 0x07, 0xa8, 0x80, 0xc2, 0xc5, 0xe7, 0x8c, 0xb3, 0x97, 0x18, 0xeb, 0x3b, 0xce, 0x1c, 0x68,
+	0x31, 0x7b, 0x98, 0x3d, 0x5e, 0x1a, 0x2e, 0xf3, 0x69, 0xe9, 0xe4, 0x4a, 0xaf, 0x73, 0x4c, 0x6a,
+	0xc4, 0xd9, 0x48, 0x4d, 0x56, 0x43, 0x6a, 0x05, 0x1b, 0xa9, 0xcd, 0x6a, 0x49, 0x1b, 0x31, 0x1f,
+	0x69, 0x93, 0xb5, 0xa9, 0x17, 0x9c, 0x79, 0xd0, 0xe2, 0xbc, 0xe8, 0x15, 0xa9, 0x97, 0xbd, 0x1b,
+	0x50, 0x97, 0xe9, 0x1e, 0x34, 0x75, 0x8c, 0xa8, 0xfe, 0x77, 0x4c, 0xb9, 0x83, 0x07, 0x53, 0x0b,
+	0xce, 0x3a, 0x40, 0x71, 0x51, 0x3a, 0x95, 0xec, 0x00, 0xe5, 0x6a, 0x9d, 0xa3, 0xd7, 0xe7, 0xb7,
+	0xa7, 0xb0, 0xc3, 0x8f, 0xa3, 0x97, 0x9b, 0x04, 0x2a, 0xa4, 0xe8, 0xf6, 0x41, 0x95, 0xc7, 0xfb,
+	0x63, 0x47, 0x1f, 0x9b, 0x65, 0xd8, 0xee, 0x97, 0x21, 0x95, 0xa5, 0xbd, 0x3b, 0x74, 0xea, 0x7b,
+	0x55, 0xbe, 0x2a, 0x6e, 0xbf, 0x02, 0x00, 0x00, 0xff, 0xff, 0x95, 0x39, 0xa3, 0x82, 0x03, 0x02,
+	0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/grpc.proto b/protoc-gen-go/testdata/imports/test_import_all.proto
similarity index 65%
copy from protoc-gen-go/testdata/grpc.proto
copy to protoc-gen-go/testdata/imports/test_import_all.proto
index b8bc41a..582d722 100644
--- a/protoc-gen-go/testdata/grpc.proto
+++ b/protoc-gen-go/testdata/imports/test_import_all.proto
@@ -1,6 +1,6 @@
 // Go support for Protocol Buffers - Google's data interchange format
 //
-// Copyright 2015 The Go Authors.  All rights reserved.
+// Copyright 2018 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
@@ -31,29 +31,28 @@
 
 syntax = "proto3";
 
-package grpc.testing;
+package test;
 
-message SimpleRequest {
-}
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/imports";
 
-message SimpleResponse {
-}
+// test_a_1/m*.proto are in the same Go package and proto package.
+// test_a_*/*.proto are in different Go packages, but the same proto package.
+// test_b_1/*.proto are in the same Go package, but different proto packages.
+// fmt/m.proto has a package name which conflicts with "fmt".
+import "imports/test_a_1/m1.proto";
+import "imports/test_a_1/m2.proto";
+import "imports/test_a_2/m3.proto";
+import "imports/test_a_2/m4.proto";
+import "imports/test_b_1/m1.proto";
+import "imports/test_b_1/m2.proto";
+import "imports/fmt/m.proto";
 
-message StreamMsg {
-}
-
-message StreamMsg2 {
-}
-
-service Test {
-  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
-
-  // This RPC streams from the server only.
-  rpc Downstream(SimpleRequest) returns (stream StreamMsg);
-
-  // This RPC streams from the client.
-  rpc Upstream(stream StreamMsg) returns (SimpleResponse);
-
-  // This one streams in both directions.
-  rpc Bidi(stream StreamMsg) returns (stream StreamMsg2);
+message All {
+  test.a.M1 am1 = 1;
+  test.a.M2 am2 = 2;
+  test.a.M3 am3 = 3;
+  test.a.M4 am4 = 4;
+  test.b.part1.M1 bm1 = 5;
+  test.b.part2.M2 bm2 = 6;
+  fmt.M fmt = 7;
 }
diff --git a/protoc-gen-go/testdata/main_test.go b/protoc-gen-go/testdata/main_test.go
index f9b5ccf..7ec1f2d 100644
--- a/protoc-gen-go/testdata/main_test.go
+++ b/protoc-gen-go/testdata/main_test.go
@@ -36,11 +36,13 @@
 import (
 	"testing"
 
-	mytestpb "./my_test"
+	importspb "github.com/golang/protobuf/protoc-gen-go/testdata/imports"
 	multipb "github.com/golang/protobuf/protoc-gen-go/testdata/multi"
+	mytestpb "github.com/golang/protobuf/protoc-gen-go/testdata/my_test"
 )
 
 func TestLink(t *testing.T) {
 	_ = &multipb.Multi1{}
 	_ = &mytestpb.Request{}
+	_ = &importspb.All{}
 }
diff --git a/protoc-gen-go/testdata/multi/multi1.pb.go b/protoc-gen-go/testdata/multi/multi1.pb.go
new file mode 100644
index 0000000..da0fdf8
--- /dev/null
+++ b/protoc-gen-go/testdata/multi/multi1.pb.go
@@ -0,0 +1,96 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: multi/multi1.proto
+
+package multitest // import "github.com/golang/protobuf/protoc-gen-go/testdata/multi"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type Multi1 struct {
+	Multi2               *Multi2         `protobuf:"bytes,1,req,name=multi2" json:"multi2,omitempty"`
+	Color                *Multi2_Color   `protobuf:"varint,2,opt,name=color,enum=multitest.Multi2_Color" json:"color,omitempty"`
+	HatType              *Multi3_HatType `protobuf:"varint,3,opt,name=hat_type,json=hatType,enum=multitest.Multi3_HatType" json:"hat_type,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
+}
+
+func (m *Multi1) Reset()         { *m = Multi1{} }
+func (m *Multi1) String() string { return proto.CompactTextString(m) }
+func (*Multi1) ProtoMessage()    {}
+func (*Multi1) Descriptor() ([]byte, []int) {
+	return fileDescriptor_multi1_08e50c6822e808b8, []int{0}
+}
+func (m *Multi1) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Multi1.Unmarshal(m, b)
+}
+func (m *Multi1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Multi1.Marshal(b, m, deterministic)
+}
+func (dst *Multi1) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Multi1.Merge(dst, src)
+}
+func (m *Multi1) XXX_Size() int {
+	return xxx_messageInfo_Multi1.Size(m)
+}
+func (m *Multi1) XXX_DiscardUnknown() {
+	xxx_messageInfo_Multi1.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Multi1 proto.InternalMessageInfo
+
+func (m *Multi1) GetMulti2() *Multi2 {
+	if m != nil {
+		return m.Multi2
+	}
+	return nil
+}
+
+func (m *Multi1) GetColor() Multi2_Color {
+	if m != nil && m.Color != nil {
+		return *m.Color
+	}
+	return Multi2_BLUE
+}
+
+func (m *Multi1) GetHatType() Multi3_HatType {
+	if m != nil && m.HatType != nil {
+		return *m.HatType
+	}
+	return Multi3_FEDORA
+}
+
+func init() {
+	proto.RegisterType((*Multi1)(nil), "multitest.Multi1")
+}
+
+func init() { proto.RegisterFile("multi/multi1.proto", fileDescriptor_multi1_08e50c6822e808b8) }
+
+var fileDescriptor_multi1_08e50c6822e808b8 = []byte{
+	// 200 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0xca, 0x2d, 0xcd, 0x29,
+	0xc9, 0xd4, 0x07, 0x93, 0x86, 0x7a, 0x05, 0x45, 0xf9, 0x25, 0xf9, 0x42, 0x9c, 0x60, 0x5e, 0x49,
+	0x6a, 0x71, 0x89, 0x14, 0xb2, 0xb4, 0x11, 0x44, 0x1a, 0x45, 0xcc, 0x18, 0x22, 0xa6, 0x34, 0x83,
+	0x91, 0x8b, 0xcd, 0x17, 0x6c, 0x86, 0x90, 0x26, 0x17, 0x1b, 0x44, 0xb9, 0x04, 0xa3, 0x02, 0x93,
+	0x06, 0xb7, 0x91, 0xa0, 0x1e, 0xdc, 0x38, 0x3d, 0xb0, 0x12, 0xa3, 0x20, 0xa8, 0x02, 0x21, 0x5d,
+	0x2e, 0xd6, 0xe4, 0xfc, 0x9c, 0xfc, 0x22, 0x09, 0x26, 0x05, 0x46, 0x0d, 0x3e, 0x23, 0x71, 0x0c,
+	0x95, 0x7a, 0xce, 0x20, 0xe9, 0x20, 0x88, 0x2a, 0x21, 0x13, 0x2e, 0x8e, 0x8c, 0xc4, 0x92, 0xf8,
+	0x92, 0xca, 0x82, 0x54, 0x09, 0x66, 0xb0, 0x0e, 0x49, 0x74, 0x1d, 0xc6, 0x7a, 0x1e, 0x89, 0x25,
+	0x21, 0x95, 0x05, 0xa9, 0x41, 0xec, 0x19, 0x10, 0x86, 0x93, 0x73, 0x94, 0x63, 0x7a, 0x66, 0x49,
+	0x46, 0x69, 0x92, 0x5e, 0x72, 0x7e, 0xae, 0x7e, 0x7a, 0x7e, 0x4e, 0x62, 0x5e, 0xba, 0x3e, 0xd8,
+	0xd5, 0x49, 0xa5, 0x69, 0x10, 0x46, 0xb2, 0x6e, 0x7a, 0x6a, 0x9e, 0x6e, 0x7a, 0xbe, 0x3e, 0xc8,
+	0xa0, 0x94, 0xc4, 0x92, 0x44, 0x88, 0xe7, 0xac, 0xe1, 0x86, 0x03, 0x02, 0x00, 0x00, 0xff, 0xff,
+	0x60, 0x7d, 0xfc, 0x9f, 0x27, 0x01, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/multi/multi1.proto b/protoc-gen-go/testdata/multi/multi1.proto
index 0da6e0a..d3a3204 100644
--- a/protoc-gen-go/testdata/multi/multi1.proto
+++ b/protoc-gen-go/testdata/multi/multi1.proto
@@ -36,6 +36,8 @@
 
 package multitest;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/multi;multitest";
+
 message Multi1 {
   required Multi2 multi2 = 1;
   optional Multi2.Color color = 2;
diff --git a/protoc-gen-go/testdata/multi/multi2.pb.go b/protoc-gen-go/testdata/multi/multi2.pb.go
new file mode 100644
index 0000000..b66ce79
--- /dev/null
+++ b/protoc-gen-go/testdata/multi/multi2.pb.go
@@ -0,0 +1,128 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: multi/multi2.proto
+
+package multitest // import "github.com/golang/protobuf/protoc-gen-go/testdata/multi"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type Multi2_Color int32
+
+const (
+	Multi2_BLUE  Multi2_Color = 1
+	Multi2_GREEN Multi2_Color = 2
+	Multi2_RED   Multi2_Color = 3
+)
+
+var Multi2_Color_name = map[int32]string{
+	1: "BLUE",
+	2: "GREEN",
+	3: "RED",
+}
+var Multi2_Color_value = map[string]int32{
+	"BLUE":  1,
+	"GREEN": 2,
+	"RED":   3,
+}
+
+func (x Multi2_Color) Enum() *Multi2_Color {
+	p := new(Multi2_Color)
+	*p = x
+	return p
+}
+func (x Multi2_Color) String() string {
+	return proto.EnumName(Multi2_Color_name, int32(x))
+}
+func (x *Multi2_Color) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(Multi2_Color_value, data, "Multi2_Color")
+	if err != nil {
+		return err
+	}
+	*x = Multi2_Color(value)
+	return nil
+}
+func (Multi2_Color) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_multi2_c47490ad66d93e67, []int{0, 0}
+}
+
+type Multi2 struct {
+	RequiredValue        *int32        `protobuf:"varint,1,req,name=required_value,json=requiredValue" json:"required_value,omitempty"`
+	Color                *Multi2_Color `protobuf:"varint,2,opt,name=color,enum=multitest.Multi2_Color" json:"color,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}      `json:"-"`
+	XXX_unrecognized     []byte        `json:"-"`
+	XXX_sizecache        int32         `json:"-"`
+}
+
+func (m *Multi2) Reset()         { *m = Multi2{} }
+func (m *Multi2) String() string { return proto.CompactTextString(m) }
+func (*Multi2) ProtoMessage()    {}
+func (*Multi2) Descriptor() ([]byte, []int) {
+	return fileDescriptor_multi2_c47490ad66d93e67, []int{0}
+}
+func (m *Multi2) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Multi2.Unmarshal(m, b)
+}
+func (m *Multi2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Multi2.Marshal(b, m, deterministic)
+}
+func (dst *Multi2) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Multi2.Merge(dst, src)
+}
+func (m *Multi2) XXX_Size() int {
+	return xxx_messageInfo_Multi2.Size(m)
+}
+func (m *Multi2) XXX_DiscardUnknown() {
+	xxx_messageInfo_Multi2.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Multi2 proto.InternalMessageInfo
+
+func (m *Multi2) GetRequiredValue() int32 {
+	if m != nil && m.RequiredValue != nil {
+		return *m.RequiredValue
+	}
+	return 0
+}
+
+func (m *Multi2) GetColor() Multi2_Color {
+	if m != nil && m.Color != nil {
+		return *m.Color
+	}
+	return Multi2_BLUE
+}
+
+func init() {
+	proto.RegisterType((*Multi2)(nil), "multitest.Multi2")
+	proto.RegisterEnum("multitest.Multi2_Color", Multi2_Color_name, Multi2_Color_value)
+}
+
+func init() { proto.RegisterFile("multi/multi2.proto", fileDescriptor_multi2_c47490ad66d93e67) }
+
+var fileDescriptor_multi2_c47490ad66d93e67 = []byte{
+	// 202 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0xca, 0x2d, 0xcd, 0x29,
+	0xc9, 0xd4, 0x07, 0x93, 0x46, 0x7a, 0x05, 0x45, 0xf9, 0x25, 0xf9, 0x42, 0x9c, 0x60, 0x5e, 0x49,
+	0x6a, 0x71, 0x89, 0x52, 0x2b, 0x23, 0x17, 0x9b, 0x2f, 0x58, 0x4e, 0x48, 0x95, 0x8b, 0xaf, 0x28,
+	0xb5, 0xb0, 0x34, 0xb3, 0x28, 0x35, 0x25, 0xbe, 0x2c, 0x31, 0xa7, 0x34, 0x55, 0x82, 0x51, 0x81,
+	0x49, 0x83, 0x35, 0x88, 0x17, 0x26, 0x1a, 0x06, 0x12, 0x14, 0xd2, 0xe5, 0x62, 0x4d, 0xce, 0xcf,
+	0xc9, 0x2f, 0x92, 0x60, 0x52, 0x60, 0xd4, 0xe0, 0x33, 0x12, 0xd7, 0x83, 0x1b, 0xa6, 0x07, 0x31,
+	0x48, 0xcf, 0x19, 0x24, 0x1d, 0x04, 0x51, 0xa5, 0xa4, 0xca, 0xc5, 0x0a, 0xe6, 0x0b, 0x71, 0x70,
+	0xb1, 0x38, 0xf9, 0x84, 0xba, 0x0a, 0x30, 0x0a, 0x71, 0x72, 0xb1, 0xba, 0x07, 0xb9, 0xba, 0xfa,
+	0x09, 0x30, 0x09, 0xb1, 0x73, 0x31, 0x07, 0xb9, 0xba, 0x08, 0x30, 0x3b, 0x39, 0x47, 0x39, 0xa6,
+	0x67, 0x96, 0x64, 0x94, 0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea, 0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5,
+	0xeb, 0x83, 0x5d, 0x9b, 0x54, 0x9a, 0x06, 0x61, 0x24, 0xeb, 0xa6, 0xa7, 0xe6, 0xe9, 0xa6, 0xe7,
+	0xeb, 0x83, 0xec, 0x4a, 0x49, 0x2c, 0x49, 0x84, 0x78, 0xca, 0x1a, 0x6e, 0x3f, 0x20, 0x00, 0x00,
+	0xff, 0xff, 0x49, 0x3b, 0x52, 0x44, 0xec, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/multi/multi2.proto b/protoc-gen-go/testdata/multi/multi2.proto
index e6bfc71..ec5b431 100644
--- a/protoc-gen-go/testdata/multi/multi2.proto
+++ b/protoc-gen-go/testdata/multi/multi2.proto
@@ -33,6 +33,8 @@
 
 package multitest;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/multi;multitest";
+
 message Multi2 {
   required int32 required_value = 1;
 
diff --git a/protoc-gen-go/testdata/multi/multi3.pb.go b/protoc-gen-go/testdata/multi/multi3.pb.go
new file mode 100644
index 0000000..f03c350
--- /dev/null
+++ b/protoc-gen-go/testdata/multi/multi3.pb.go
@@ -0,0 +1,115 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: multi/multi3.proto
+
+package multitest // import "github.com/golang/protobuf/protoc-gen-go/testdata/multi"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type Multi3_HatType int32
+
+const (
+	Multi3_FEDORA Multi3_HatType = 1
+	Multi3_FEZ    Multi3_HatType = 2
+)
+
+var Multi3_HatType_name = map[int32]string{
+	1: "FEDORA",
+	2: "FEZ",
+}
+var Multi3_HatType_value = map[string]int32{
+	"FEDORA": 1,
+	"FEZ":    2,
+}
+
+func (x Multi3_HatType) Enum() *Multi3_HatType {
+	p := new(Multi3_HatType)
+	*p = x
+	return p
+}
+func (x Multi3_HatType) String() string {
+	return proto.EnumName(Multi3_HatType_name, int32(x))
+}
+func (x *Multi3_HatType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(Multi3_HatType_value, data, "Multi3_HatType")
+	if err != nil {
+		return err
+	}
+	*x = Multi3_HatType(value)
+	return nil
+}
+func (Multi3_HatType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_multi3_d55a72b4628b7875, []int{0, 0}
+}
+
+type Multi3 struct {
+	HatType              *Multi3_HatType `protobuf:"varint,1,opt,name=hat_type,json=hatType,enum=multitest.Multi3_HatType" json:"hat_type,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
+}
+
+func (m *Multi3) Reset()         { *m = Multi3{} }
+func (m *Multi3) String() string { return proto.CompactTextString(m) }
+func (*Multi3) ProtoMessage()    {}
+func (*Multi3) Descriptor() ([]byte, []int) {
+	return fileDescriptor_multi3_d55a72b4628b7875, []int{0}
+}
+func (m *Multi3) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Multi3.Unmarshal(m, b)
+}
+func (m *Multi3) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Multi3.Marshal(b, m, deterministic)
+}
+func (dst *Multi3) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Multi3.Merge(dst, src)
+}
+func (m *Multi3) XXX_Size() int {
+	return xxx_messageInfo_Multi3.Size(m)
+}
+func (m *Multi3) XXX_DiscardUnknown() {
+	xxx_messageInfo_Multi3.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Multi3 proto.InternalMessageInfo
+
+func (m *Multi3) GetHatType() Multi3_HatType {
+	if m != nil && m.HatType != nil {
+		return *m.HatType
+	}
+	return Multi3_FEDORA
+}
+
+func init() {
+	proto.RegisterType((*Multi3)(nil), "multitest.Multi3")
+	proto.RegisterEnum("multitest.Multi3_HatType", Multi3_HatType_name, Multi3_HatType_value)
+}
+
+func init() { proto.RegisterFile("multi/multi3.proto", fileDescriptor_multi3_d55a72b4628b7875) }
+
+var fileDescriptor_multi3_d55a72b4628b7875 = []byte{
+	// 170 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0xca, 0x2d, 0xcd, 0x29,
+	0xc9, 0xd4, 0x07, 0x93, 0xc6, 0x7a, 0x05, 0x45, 0xf9, 0x25, 0xf9, 0x42, 0x9c, 0x60, 0x5e, 0x49,
+	0x6a, 0x71, 0x89, 0x52, 0x1c, 0x17, 0x9b, 0x2f, 0x58, 0x4a, 0xc8, 0x84, 0x8b, 0x23, 0x23, 0xb1,
+	0x24, 0xbe, 0xa4, 0xb2, 0x20, 0x55, 0x82, 0x51, 0x81, 0x51, 0x83, 0xcf, 0x48, 0x52, 0x0f, 0xae,
+	0x4e, 0x0f, 0xa2, 0x48, 0xcf, 0x23, 0xb1, 0x24, 0xa4, 0xb2, 0x20, 0x35, 0x88, 0x3d, 0x03, 0xc2,
+	0x50, 0x92, 0xe3, 0x62, 0x87, 0x8a, 0x09, 0x71, 0x71, 0xb1, 0xb9, 0xb9, 0xba, 0xf8, 0x07, 0x39,
+	0x0a, 0x30, 0x0a, 0xb1, 0x73, 0x31, 0xbb, 0xb9, 0x46, 0x09, 0x30, 0x39, 0x39, 0x47, 0x39, 0xa6,
+	0x67, 0x96, 0x64, 0x94, 0x26, 0xe9, 0x25, 0xe7, 0xe7, 0xea, 0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5,
+	0xeb, 0x83, 0x5d, 0x91, 0x54, 0x9a, 0x06, 0x61, 0x24, 0xeb, 0xa6, 0xa7, 0xe6, 0xe9, 0xa6, 0xe7,
+	0xeb, 0x83, 0x2c, 0x4a, 0x49, 0x2c, 0x49, 0x84, 0x38, 0xd6, 0x1a, 0x6e, 0x39, 0x20, 0x00, 0x00,
+	0xff, 0xff, 0xd5, 0xa4, 0x1a, 0x0e, 0xc4, 0x00, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/multi/multi3.proto b/protoc-gen-go/testdata/multi/multi3.proto
index 146c255..8690b88 100644
--- a/protoc-gen-go/testdata/multi/multi3.proto
+++ b/protoc-gen-go/testdata/multi/multi3.proto
@@ -33,6 +33,8 @@
 
 package multitest;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/multi;multitest";
+
 message Multi3 {
   enum HatType {
     FEDORA = 1;
diff --git a/protoc-gen-go/testdata/my_test/test.pb.go b/protoc-gen-go/testdata/my_test/test.pb.go
index 1954e3f..8cf6a69 100644
--- a/protoc-gen-go/testdata/my_test/test.pb.go
+++ b/protoc-gen-go/testdata/my_test/test.pb.go
@@ -1,24 +1,11 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: my_test/test.proto
 
+package test // import "github.com/golang/protobuf/protoc-gen-go/testdata/my_test"
+
 /*
-Package my_test is a generated protocol buffer package.
-
 This package holds interesting messages.
-
-It is generated from these files:
-	my_test/test.proto
-
-It has these top-level messages:
-	Request
-	Reply
-	OtherBase
-	ReplyExtensions
-	OtherReplyExtensions
-	OldReply
-	Communique
 */
-package my_test
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -69,6 +56,9 @@
 	*x = HatType(value)
 	return nil
 }
+func (HatType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{0}
+}
 
 // This enum represents days of the week.
 type Days int32
@@ -106,6 +96,9 @@
 	*x = Days(value)
 	return nil
 }
+func (Days) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{1}
+}
 
 type Request_Color int32
 
@@ -142,6 +135,9 @@
 	*x = Request_Color(value)
 	return nil
 }
+func (Request_Color) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{0, 0}
+}
 
 type Reply_Entry_Game int32
 
@@ -175,6 +171,9 @@
 	*x = Reply_Entry_Game(value)
 	return nil
 }
+func (Reply_Entry_Game) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{1, 0, 0}
+}
 
 // This is a message that might be sent somewhere.
 type Request struct {
@@ -191,13 +190,35 @@
 	MsgMapping map[int64]*Reply `protobuf:"bytes,15,rep,name=msg_mapping,json=msgMapping" json:"msg_mapping,omitempty" protobuf_key:"zigzag64,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
 	Reset_     *int32           `protobuf:"varint,12,opt,name=reset" json:"reset,omitempty"`
 	// This field should not conflict with any getters.
-	GetKey_          *string `protobuf:"bytes,16,opt,name=get_key,json=getKey" json:"get_key,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+	GetKey_              *string  `protobuf:"bytes,16,opt,name=get_key,json=getKey" json:"get_key,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *Request) Reset()         { *m = Request{} }
 func (m *Request) String() string { return proto.CompactTextString(m) }
 func (*Request) ProtoMessage()    {}
+func (*Request) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{0}
+}
+func (m *Request) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Request.Unmarshal(m, b)
+}
+func (m *Request) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Request.Marshal(b, m, deterministic)
+}
+func (dst *Request) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Request.Merge(dst, src)
+}
+func (m *Request) XXX_Size() int {
+	return xxx_messageInfo_Request.Size(m)
+}
+func (m *Request) XXX_DiscardUnknown() {
+	xxx_messageInfo_Request.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Request proto.InternalMessageInfo
 
 const Default_Request_Hat HatType = HatType_FEDORA
 
@@ -267,13 +288,35 @@
 }
 
 type Request_SomeGroup struct {
-	GroupField       *int32 `protobuf:"varint,9,opt,name=group_field,json=groupField" json:"group_field,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
+	GroupField           *int32   `protobuf:"varint,9,opt,name=group_field,json=groupField" json:"group_field,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *Request_SomeGroup) Reset()         { *m = Request_SomeGroup{} }
 func (m *Request_SomeGroup) String() string { return proto.CompactTextString(m) }
 func (*Request_SomeGroup) ProtoMessage()    {}
+func (*Request_SomeGroup) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{0, 0}
+}
+func (m *Request_SomeGroup) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Request_SomeGroup.Unmarshal(m, b)
+}
+func (m *Request_SomeGroup) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Request_SomeGroup.Marshal(b, m, deterministic)
+}
+func (dst *Request_SomeGroup) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Request_SomeGroup.Merge(dst, src)
+}
+func (m *Request_SomeGroup) XXX_Size() int {
+	return xxx_messageInfo_Request_SomeGroup.Size(m)
+}
+func (m *Request_SomeGroup) XXX_DiscardUnknown() {
+	xxx_messageInfo_Request_SomeGroup.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Request_SomeGroup proto.InternalMessageInfo
 
 func (m *Request_SomeGroup) GetGroupField() int32 {
 	if m != nil && m.GroupField != nil {
@@ -285,21 +328,43 @@
 type Reply struct {
 	Found                        []*Reply_Entry `protobuf:"bytes,1,rep,name=found" json:"found,omitempty"`
 	CompactKeys                  []int32        `protobuf:"varint,2,rep,packed,name=compact_keys,json=compactKeys" json:"compact_keys,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{}       `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
 func (m *Reply) Reset()         { *m = Reply{} }
 func (m *Reply) String() string { return proto.CompactTextString(m) }
 func (*Reply) ProtoMessage()    {}
+func (*Reply) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{1}
+}
 
 var extRange_Reply = []proto.ExtensionRange{
-	{100, 536870911},
+	{Start: 100, End: 536870911},
 }
 
 func (*Reply) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_Reply
 }
+func (m *Reply) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Reply.Unmarshal(m, b)
+}
+func (m *Reply) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Reply.Marshal(b, m, deterministic)
+}
+func (dst *Reply) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Reply.Merge(dst, src)
+}
+func (m *Reply) XXX_Size() int {
+	return xxx_messageInfo_Reply.Size(m)
+}
+func (m *Reply) XXX_DiscardUnknown() {
+	xxx_messageInfo_Reply.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Reply proto.InternalMessageInfo
 
 func (m *Reply) GetFound() []*Reply_Entry {
 	if m != nil {
@@ -316,15 +381,37 @@
 }
 
 type Reply_Entry struct {
-	KeyThatNeeds_1234Camel_CasIng *int64 `protobuf:"varint,1,req,name=key_that_needs_1234camel_CasIng,json=keyThatNeeds1234camelCasIng" json:"key_that_needs_1234camel_CasIng,omitempty"`
-	Value                         *int64 `protobuf:"varint,2,opt,name=value,def=7" json:"value,omitempty"`
-	XMyFieldName_2                *int64 `protobuf:"varint,3,opt,name=_my_field_name_2,json=MyFieldName2" json:"_my_field_name_2,omitempty"`
-	XXX_unrecognized              []byte `json:"-"`
+	KeyThatNeeds_1234Camel_CasIng *int64   `protobuf:"varint,1,req,name=key_that_needs_1234camel_CasIng,json=keyThatNeeds1234camelCasIng" json:"key_that_needs_1234camel_CasIng,omitempty"`
+	Value                         *int64   `protobuf:"varint,2,opt,name=value,def=7" json:"value,omitempty"`
+	XMyFieldName_2                *int64   `protobuf:"varint,3,opt,name=_my_field_name_2,json=MyFieldName2" json:"_my_field_name_2,omitempty"`
+	XXX_NoUnkeyedLiteral          struct{} `json:"-"`
+	XXX_unrecognized              []byte   `json:"-"`
+	XXX_sizecache                 int32    `json:"-"`
 }
 
 func (m *Reply_Entry) Reset()         { *m = Reply_Entry{} }
 func (m *Reply_Entry) String() string { return proto.CompactTextString(m) }
 func (*Reply_Entry) ProtoMessage()    {}
+func (*Reply_Entry) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{1, 0}
+}
+func (m *Reply_Entry) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Reply_Entry.Unmarshal(m, b)
+}
+func (m *Reply_Entry) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Reply_Entry.Marshal(b, m, deterministic)
+}
+func (dst *Reply_Entry) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Reply_Entry.Merge(dst, src)
+}
+func (m *Reply_Entry) XXX_Size() int {
+	return xxx_messageInfo_Reply_Entry.Size(m)
+}
+func (m *Reply_Entry) XXX_DiscardUnknown() {
+	xxx_messageInfo_Reply_Entry.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Reply_Entry proto.InternalMessageInfo
 
 const Default_Reply_Entry_Value int64 = 7
 
@@ -350,22 +437,44 @@
 }
 
 type OtherBase struct {
-	Name                         *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Name                         *string  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
 	proto.XXX_InternalExtensions `json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
 func (m *OtherBase) Reset()         { *m = OtherBase{} }
 func (m *OtherBase) String() string { return proto.CompactTextString(m) }
 func (*OtherBase) ProtoMessage()    {}
+func (*OtherBase) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{2}
+}
 
 var extRange_OtherBase = []proto.ExtensionRange{
-	{100, 536870911},
+	{Start: 100, End: 536870911},
 }
 
 func (*OtherBase) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_OtherBase
 }
+func (m *OtherBase) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OtherBase.Unmarshal(m, b)
+}
+func (m *OtherBase) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OtherBase.Marshal(b, m, deterministic)
+}
+func (dst *OtherBase) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OtherBase.Merge(dst, src)
+}
+func (m *OtherBase) XXX_Size() int {
+	return xxx_messageInfo_OtherBase.Size(m)
+}
+func (m *OtherBase) XXX_DiscardUnknown() {
+	xxx_messageInfo_OtherBase.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OtherBase proto.InternalMessageInfo
 
 func (m *OtherBase) GetName() string {
 	if m != nil && m.Name != nil {
@@ -375,12 +484,34 @@
 }
 
 type ReplyExtensions struct {
-	XXX_unrecognized []byte `json:"-"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *ReplyExtensions) Reset()         { *m = ReplyExtensions{} }
 func (m *ReplyExtensions) String() string { return proto.CompactTextString(m) }
 func (*ReplyExtensions) ProtoMessage()    {}
+func (*ReplyExtensions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{3}
+}
+func (m *ReplyExtensions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ReplyExtensions.Unmarshal(m, b)
+}
+func (m *ReplyExtensions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ReplyExtensions.Marshal(b, m, deterministic)
+}
+func (dst *ReplyExtensions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ReplyExtensions.Merge(dst, src)
+}
+func (m *ReplyExtensions) XXX_Size() int {
+	return xxx_messageInfo_ReplyExtensions.Size(m)
+}
+func (m *ReplyExtensions) XXX_DiscardUnknown() {
+	xxx_messageInfo_ReplyExtensions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ReplyExtensions proto.InternalMessageInfo
 
 var E_ReplyExtensions_Time = &proto.ExtensionDesc{
 	ExtendedType:  (*Reply)(nil),
@@ -410,13 +541,35 @@
 }
 
 type OtherReplyExtensions struct {
-	Key              *int32 `protobuf:"varint,1,opt,name=key" json:"key,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
+	Key                  *int32   `protobuf:"varint,1,opt,name=key" json:"key,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *OtherReplyExtensions) Reset()         { *m = OtherReplyExtensions{} }
 func (m *OtherReplyExtensions) String() string { return proto.CompactTextString(m) }
 func (*OtherReplyExtensions) ProtoMessage()    {}
+func (*OtherReplyExtensions) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{4}
+}
+func (m *OtherReplyExtensions) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OtherReplyExtensions.Unmarshal(m, b)
+}
+func (m *OtherReplyExtensions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OtherReplyExtensions.Marshal(b, m, deterministic)
+}
+func (dst *OtherReplyExtensions) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OtherReplyExtensions.Merge(dst, src)
+}
+func (m *OtherReplyExtensions) XXX_Size() int {
+	return xxx_messageInfo_OtherReplyExtensions.Size(m)
+}
+func (m *OtherReplyExtensions) XXX_DiscardUnknown() {
+	xxx_messageInfo_OtherReplyExtensions.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OtherReplyExtensions proto.InternalMessageInfo
 
 func (m *OtherReplyExtensions) GetKey() int32 {
 	if m != nil && m.Key != nil {
@@ -426,20 +579,19 @@
 }
 
 type OldReply struct {
-	proto.XXX_InternalExtensions `json:"-"`
+	XXX_NoUnkeyedLiteral         struct{} `json:"-"`
+	proto.XXX_InternalExtensions `protobuf_messageset:"1" json:"-"`
 	XXX_unrecognized             []byte `json:"-"`
+	XXX_sizecache                int32  `json:"-"`
 }
 
 func (m *OldReply) Reset()         { *m = OldReply{} }
 func (m *OldReply) String() string { return proto.CompactTextString(m) }
 func (*OldReply) ProtoMessage()    {}
+func (*OldReply) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{5}
+}
 
-func (m *OldReply) Marshal() ([]byte, error) {
-	return proto.MarshalMessageSet(&m.XXX_InternalExtensions)
-}
-func (m *OldReply) Unmarshal(buf []byte) error {
-	return proto.UnmarshalMessageSet(buf, &m.XXX_InternalExtensions)
-}
 func (m *OldReply) MarshalJSON() ([]byte, error) {
 	return proto.MarshalMessageSetJSON(&m.XXX_InternalExtensions)
 }
@@ -447,17 +599,30 @@
 	return proto.UnmarshalMessageSetJSON(buf, &m.XXX_InternalExtensions)
 }
 
-// ensure OldReply satisfies proto.Marshaler and proto.Unmarshaler
-var _ proto.Marshaler = (*OldReply)(nil)
-var _ proto.Unmarshaler = (*OldReply)(nil)
-
 var extRange_OldReply = []proto.ExtensionRange{
-	{100, 2147483646},
+	{Start: 100, End: 2147483646},
 }
 
 func (*OldReply) ExtensionRangeArray() []proto.ExtensionRange {
 	return extRange_OldReply
 }
+func (m *OldReply) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_OldReply.Unmarshal(m, b)
+}
+func (m *OldReply) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_OldReply.Marshal(b, m, deterministic)
+}
+func (dst *OldReply) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_OldReply.Merge(dst, src)
+}
+func (m *OldReply) XXX_Size() int {
+	return xxx_messageInfo_OldReply.Size(m)
+}
+func (m *OldReply) XXX_DiscardUnknown() {
+	xxx_messageInfo_OldReply.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_OldReply proto.InternalMessageInfo
 
 type Communique struct {
 	MakeMeCry *bool `protobuf:"varint,1,opt,name=make_me_cry,json=makeMeCry" json:"make_me_cry,omitempty"`
@@ -474,13 +639,35 @@
 	//	*Communique_Delta_
 	//	*Communique_Msg
 	//	*Communique_Somegroup
-	Union            isCommunique_Union `protobuf_oneof:"union"`
-	XXX_unrecognized []byte             `json:"-"`
+	Union                isCommunique_Union `protobuf_oneof:"union"`
+	XXX_NoUnkeyedLiteral struct{}           `json:"-"`
+	XXX_unrecognized     []byte             `json:"-"`
+	XXX_sizecache        int32              `json:"-"`
 }
 
 func (m *Communique) Reset()         { *m = Communique{} }
 func (m *Communique) String() string { return proto.CompactTextString(m) }
 func (*Communique) ProtoMessage()    {}
+func (*Communique) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{6}
+}
+func (m *Communique) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Communique.Unmarshal(m, b)
+}
+func (m *Communique) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Communique.Marshal(b, m, deterministic)
+}
+func (dst *Communique) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Communique.Merge(dst, src)
+}
+func (m *Communique) XXX_Size() int {
+	return xxx_messageInfo_Communique.Size(m)
+}
+func (m *Communique) XXX_DiscardUnknown() {
+	xxx_messageInfo_Communique.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Communique proto.InternalMessageInfo
 
 type isCommunique_Union interface {
 	isCommunique_Union()
@@ -511,7 +698,7 @@
 	Delta int32 `protobuf:"zigzag32,12,opt,name=delta,oneof"`
 }
 type Communique_Msg struct {
-	Msg *Reply `protobuf:"bytes,13,opt,name=msg,oneof"`
+	Msg *Reply `protobuf:"bytes,16,opt,name=msg,oneof"`
 }
 type Communique_Somegroup struct {
 	Somegroup *Communique_SomeGroup `protobuf:"group,14,opt,name=SomeGroup,json=somegroup,oneof"`
@@ -661,7 +848,7 @@
 		b.EncodeVarint(12<<3 | proto.WireVarint)
 		b.EncodeZigzag32(uint64(x.Delta))
 	case *Communique_Msg:
-		b.EncodeVarint(13<<3 | proto.WireBytes)
+		b.EncodeVarint(16<<3 | proto.WireBytes)
 		if err := b.EncodeMessage(x.Msg); err != nil {
 			return err
 		}
@@ -737,7 +924,7 @@
 		x, err := b.DecodeZigzag32()
 		m.Union = &Communique_Delta_{int32(x)}
 		return true, err
-	case 13: // union.msg
+	case 16: // union.msg
 		if wire != proto.WireBytes {
 			return true, proto.ErrInternalBadWireType
 		}
@@ -763,40 +950,40 @@
 	// union
 	switch x := m.Union.(type) {
 	case *Communique_Number:
-		n += proto.SizeVarint(5<<3 | proto.WireVarint)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(x.Number))
 	case *Communique_Name:
-		n += proto.SizeVarint(6<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(len(x.Name)))
 		n += len(x.Name)
 	case *Communique_Data:
-		n += proto.SizeVarint(7<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(len(x.Data)))
 		n += len(x.Data)
 	case *Communique_TempC:
-		n += proto.SizeVarint(8<<3 | proto.WireFixed64)
+		n += 1 // tag and wire
 		n += 8
 	case *Communique_Height:
-		n += proto.SizeVarint(9<<3 | proto.WireFixed32)
+		n += 1 // tag and wire
 		n += 4
 	case *Communique_Today:
-		n += proto.SizeVarint(10<<3 | proto.WireVarint)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(x.Today))
 	case *Communique_Maybe:
-		n += proto.SizeVarint(11<<3 | proto.WireVarint)
+		n += 1 // tag and wire
 		n += 1
 	case *Communique_Delta_:
-		n += proto.SizeVarint(12<<3 | proto.WireVarint)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64((uint32(x.Delta) << 1) ^ uint32((int32(x.Delta) >> 31))))
 	case *Communique_Msg:
 		s := proto.Size(x.Msg)
-		n += proto.SizeVarint(13<<3 | proto.WireBytes)
+		n += 2 // tag and wire
 		n += proto.SizeVarint(uint64(s))
 		n += s
 	case *Communique_Somegroup:
-		n += proto.SizeVarint(14<<3 | proto.WireStartGroup)
+		n += 1 // tag and wire
 		n += proto.Size(x.Somegroup)
-		n += proto.SizeVarint(14<<3 | proto.WireEndGroup)
+		n += 1 // tag and wire
 	case nil:
 	default:
 		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
@@ -805,13 +992,35 @@
 }
 
 type Communique_SomeGroup struct {
-	Member           *string `protobuf:"bytes,15,opt,name=member" json:"member,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
+	Member               *string  `protobuf:"bytes,15,opt,name=member" json:"member,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *Communique_SomeGroup) Reset()         { *m = Communique_SomeGroup{} }
 func (m *Communique_SomeGroup) String() string { return proto.CompactTextString(m) }
 func (*Communique_SomeGroup) ProtoMessage()    {}
+func (*Communique_SomeGroup) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{6, 0}
+}
+func (m *Communique_SomeGroup) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Communique_SomeGroup.Unmarshal(m, b)
+}
+func (m *Communique_SomeGroup) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Communique_SomeGroup.Marshal(b, m, deterministic)
+}
+func (dst *Communique_SomeGroup) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Communique_SomeGroup.Merge(dst, src)
+}
+func (m *Communique_SomeGroup) XXX_Size() int {
+	return xxx_messageInfo_Communique_SomeGroup.Size(m)
+}
+func (m *Communique_SomeGroup) XXX_DiscardUnknown() {
+	xxx_messageInfo_Communique_SomeGroup.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Communique_SomeGroup proto.InternalMessageInfo
 
 func (m *Communique_SomeGroup) GetMember() string {
 	if m != nil && m.Member != nil {
@@ -821,12 +1030,34 @@
 }
 
 type Communique_Delta struct {
-	XXX_unrecognized []byte `json:"-"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *Communique_Delta) Reset()         { *m = Communique_Delta{} }
 func (m *Communique_Delta) String() string { return proto.CompactTextString(m) }
 func (*Communique_Delta) ProtoMessage()    {}
+func (*Communique_Delta) Descriptor() ([]byte, []int) {
+	return fileDescriptor_test_2309d445eee26af7, []int{6, 1}
+}
+func (m *Communique_Delta) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Communique_Delta.Unmarshal(m, b)
+}
+func (m *Communique_Delta) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Communique_Delta.Marshal(b, m, deterministic)
+}
+func (dst *Communique_Delta) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Communique_Delta.Merge(dst, src)
+}
+func (m *Communique_Delta) XXX_Size() int {
+	return xxx_messageInfo_Communique_Delta.Size(m)
+}
+func (m *Communique_Delta) XXX_DiscardUnknown() {
+	xxx_messageInfo_Communique_Delta.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Communique_Delta proto.InternalMessageInfo
 
 var E_Tag = &proto.ExtensionDesc{
 	ExtendedType:  (*Reply)(nil),
@@ -848,6 +1079,8 @@
 
 func init() {
 	proto.RegisterType((*Request)(nil), "my.test.Request")
+	proto.RegisterMapType((map[int64]*Reply)(nil), "my.test.Request.MsgMappingEntry")
+	proto.RegisterMapType((map[int32]string)(nil), "my.test.Request.NameMappingEntry")
 	proto.RegisterType((*Request_SomeGroup)(nil), "my.test.Request.SomeGroup")
 	proto.RegisterType((*Reply)(nil), "my.test.Reply")
 	proto.RegisterType((*Reply_Entry)(nil), "my.test.Reply.Entry")
@@ -868,3 +1101,74 @@
 	proto.RegisterExtension(E_Tag)
 	proto.RegisterExtension(E_Donut)
 }
+
+func init() { proto.RegisterFile("my_test/test.proto", fileDescriptor_test_2309d445eee26af7) }
+
+var fileDescriptor_test_2309d445eee26af7 = []byte{
+	// 1033 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x55, 0xdd, 0x6e, 0xe3, 0x44,
+	0x14, 0xce, 0xd8, 0x71, 0x7e, 0x4e, 0x42, 0x6b, 0x46, 0x55, 0x6b, 0x05, 0xed, 0xd6, 0x04, 0x8a,
+	0x4c, 0xc5, 0xa6, 0xda, 0x80, 0xc4, 0x2a, 0x88, 0xd5, 0x36, 0x3f, 0x6d, 0xaa, 0x6d, 0x12, 0x69,
+	0xda, 0x5e, 0xb0, 0x37, 0xd6, 0x34, 0x9e, 0x3a, 0xa6, 0x19, 0x3b, 0x6b, 0x8f, 0x11, 0xbe, 0xeb,
+	0x53, 0xc0, 0x6b, 0x70, 0xcf, 0x0b, 0xf1, 0x16, 0x45, 0x33, 0x0e, 0x49, 0xda, 0xa0, 0xbd, 0xb1,
+	0x7c, 0xce, 0xf9, 0xce, 0xe7, 0x39, 0x3f, 0xfe, 0x06, 0x30, 0xcf, 0x5c, 0xc1, 0x12, 0x71, 0x22,
+	0x1f, 0xad, 0x45, 0x1c, 0x89, 0x08, 0x97, 0x79, 0xd6, 0x92, 0x66, 0x03, 0xf3, 0x74, 0x2e, 0x82,
+	0x13, 0xf5, 0x7c, 0x9d, 0x07, 0x9b, 0xff, 0x14, 0xa1, 0x4c, 0xd8, 0xc7, 0x94, 0x25, 0x02, 0x9b,
+	0xa0, 0xdf, 0xb3, 0xcc, 0x42, 0xb6, 0xee, 0xe8, 0x44, 0xbe, 0x62, 0x07, 0xf4, 0x59, 0xca, 0x2c,
+	0xdd, 0x46, 0xce, 0x4e, 0x7b, 0xbf, 0xb5, 0x24, 0x6a, 0x2d, 0x13, 0x5a, 0xbd, 0x68, 0x1e, 0xc5,
+	0x44, 0x42, 0xf0, 0x31, 0xe8, 0x33, 0x2a, 0xac, 0xa2, 0x42, 0x9a, 0x2b, 0xe4, 0x90, 0x8a, 0xeb,
+	0x6c, 0xc1, 0x3a, 0xa5, 0xb3, 0x41, 0x7f, 0x42, 0x4e, 0x89, 0x04, 0xe1, 0x43, 0xa8, 0x78, 0x8c,
+	0x7a, 0xf3, 0x20, 0x64, 0x56, 0xd9, 0x46, 0x8e, 0xd6, 0xd1, 0x83, 0xf0, 0x8e, 0xac, 0x9c, 0xf8,
+	0x0d, 0x54, 0x93, 0x88, 0x33, 0x3f, 0x8e, 0xd2, 0x85, 0x55, 0xb1, 0x91, 0x03, 0xed, 0xc6, 0xd6,
+	0xc7, 0xaf, 0x22, 0xce, 0xce, 0x25, 0x82, 0xac, 0xc1, 0xb8, 0x0f, 0xf5, 0x90, 0x72, 0xe6, 0x72,
+	0xba, 0x58, 0x04, 0xa1, 0x6f, 0xed, 0xd8, 0xba, 0x53, 0x6b, 0x7f, 0xb9, 0x95, 0x3c, 0xa6, 0x9c,
+	0x8d, 0x72, 0xcc, 0x20, 0x14, 0x71, 0x46, 0x6a, 0xe1, 0xda, 0x83, 0x4f, 0xa1, 0xc6, 0x13, 0x7f,
+	0x45, 0xb2, 0xab, 0x48, 0xec, 0x2d, 0x92, 0x51, 0xe2, 0x3f, 0xe1, 0x00, 0xbe, 0x72, 0xe0, 0x3d,
+	0x30, 0x62, 0x96, 0x30, 0x61, 0xd5, 0x6d, 0xe4, 0x18, 0x24, 0x37, 0xf0, 0x01, 0x94, 0x7d, 0x26,
+	0x5c, 0xd9, 0x65, 0xd3, 0x46, 0x4e, 0x95, 0x94, 0x7c, 0x26, 0xde, 0xb3, 0xac, 0xf1, 0x1d, 0x54,
+	0x57, 0xf5, 0xe0, 0x43, 0xa8, 0xa9, 0x6a, 0xdc, 0xbb, 0x80, 0xcd, 0x3d, 0xab, 0xaa, 0x18, 0x40,
+	0xb9, 0xce, 0xa4, 0xa7, 0xf1, 0x16, 0xcc, 0xe7, 0x05, 0xac, 0x87, 0x27, 0xc1, 0x6a, 0x78, 0x7b,
+	0x60, 0xfc, 0x46, 0xe7, 0x29, 0xb3, 0x34, 0xf5, 0xa9, 0xdc, 0xe8, 0x68, 0x6f, 0x50, 0x63, 0x04,
+	0xbb, 0xcf, 0xce, 0xbe, 0x99, 0x8e, 0xf3, 0xf4, 0xaf, 0x37, 0xd3, 0x6b, 0xed, 0x9d, 0x8d, 0xf2,
+	0x17, 0xf3, 0x6c, 0x83, 0xae, 0x79, 0x04, 0x86, 0xda, 0x04, 0x5c, 0x06, 0x9d, 0x0c, 0xfa, 0x66,
+	0x01, 0x57, 0xc1, 0x38, 0x27, 0x83, 0xc1, 0xd8, 0x44, 0xb8, 0x02, 0xc5, 0xee, 0xe5, 0xcd, 0xc0,
+	0xd4, 0x9a, 0x7f, 0x6a, 0x60, 0xa8, 0x5c, 0x7c, 0x0c, 0xc6, 0x5d, 0x94, 0x86, 0x9e, 0x5a, 0xb5,
+	0x5a, 0x7b, 0xef, 0x29, 0x75, 0x2b, 0xef, 0x66, 0x0e, 0xc1, 0x47, 0x50, 0x9f, 0x46, 0x7c, 0x41,
+	0xa7, 0xaa, 0x6d, 0x89, 0xa5, 0xd9, 0xba, 0x63, 0x74, 0x35, 0x13, 0x91, 0xda, 0xd2, 0xff, 0x9e,
+	0x65, 0x49, 0xe3, 0x2f, 0x04, 0x46, 0x5e, 0x49, 0x1f, 0x0e, 0xef, 0x59, 0xe6, 0x8a, 0x19, 0x15,
+	0x6e, 0xc8, 0x98, 0x97, 0xb8, 0xaf, 0xdb, 0xdf, 0xff, 0x30, 0xa5, 0x9c, 0xcd, 0xdd, 0x1e, 0x4d,
+	0x2e, 0x42, 0xdf, 0x42, 0xb6, 0xe6, 0xe8, 0xe4, 0x8b, 0x7b, 0x96, 0x5d, 0xcf, 0xa8, 0x18, 0x4b,
+	0xd0, 0x0a, 0x93, 0x43, 0xf0, 0xc1, 0x66, 0xf5, 0x7a, 0x07, 0xfd, 0xb8, 0x2c, 0x18, 0x7f, 0x03,
+	0xa6, 0xcb, 0xb3, 0x7c, 0x34, 0xae, 0xda, 0xb5, 0xb6, 0xfa, 0x3f, 0x74, 0x52, 0x1f, 0x65, 0x6a,
+	0x3c, 0x72, 0x34, 0xed, 0xa6, 0x0d, 0xc5, 0x73, 0xca, 0x19, 0xae, 0x43, 0xe5, 0x6c, 0x32, 0xb9,
+	0xee, 0x9e, 0x5e, 0x5e, 0x9a, 0x08, 0x03, 0x94, 0xae, 0x07, 0xe3, 0xf1, 0xc5, 0x95, 0xa9, 0x1d,
+	0x57, 0x2a, 0x9e, 0xf9, 0xf0, 0xf0, 0xf0, 0xa0, 0x35, 0xbf, 0x85, 0xea, 0x44, 0xcc, 0x58, 0xdc,
+	0xa5, 0x09, 0xc3, 0x18, 0x8a, 0x92, 0x56, 0x8d, 0xa2, 0x4a, 0xd4, 0xfb, 0x06, 0xf4, 0x6f, 0x04,
+	0xbb, 0xaa, 0x4b, 0x83, 0xdf, 0x05, 0x0b, 0x93, 0x20, 0x0a, 0x93, 0x76, 0x13, 0x8a, 0x22, 0xe0,
+	0x0c, 0x3f, 0x1b, 0x91, 0xc5, 0x6c, 0xe4, 0x20, 0xa2, 0x62, 0xed, 0x77, 0x50, 0x9a, 0xd2, 0x38,
+	0x8e, 0xc4, 0x16, 0x2a, 0x50, 0xe3, 0xb5, 0x9e, 0x7a, 0xd7, 0xec, 0x64, 0x99, 0xd7, 0xee, 0x82,
+	0xe1, 0x45, 0x61, 0x2a, 0x30, 0x5e, 0x41, 0x57, 0x87, 0x56, 0x9f, 0xfa, 0x14, 0x49, 0x9e, 0xda,
+	0x74, 0x60, 0x4f, 0xe5, 0x3c, 0x0b, 0x6f, 0x2f, 0x6f, 0xd3, 0x82, 0xca, 0x64, 0xee, 0x29, 0x9c,
+	0xaa, 0xfe, 0xf1, 0xf1, 0xf1, 0xb1, 0xdc, 0xd1, 0x2a, 0xa8, 0xf9, 0x87, 0x0e, 0xd0, 0x8b, 0x38,
+	0x4f, 0xc3, 0xe0, 0x63, 0xca, 0xf0, 0x4b, 0xa8, 0x71, 0x7a, 0xcf, 0x5c, 0xce, 0xdc, 0x69, 0x9c,
+	0x53, 0x54, 0x48, 0x55, 0xba, 0x46, 0xac, 0x17, 0x67, 0xd8, 0x82, 0x52, 0x98, 0xf2, 0x5b, 0x16,
+	0x5b, 0x86, 0x64, 0x1f, 0x16, 0xc8, 0xd2, 0xc6, 0x7b, 0xcb, 0x46, 0x97, 0x64, 0xa3, 0x87, 0x85,
+	0xbc, 0xd5, 0xd2, 0xeb, 0x51, 0x41, 0x95, 0x30, 0xd5, 0xa5, 0x57, 0x5a, 0xf8, 0x00, 0x4a, 0x82,
+	0xf1, 0x85, 0x3b, 0x55, 0x72, 0x84, 0x86, 0x05, 0x62, 0x48, 0xbb, 0x27, 0xe9, 0x67, 0x2c, 0xf0,
+	0x67, 0x42, 0xfd, 0xa6, 0x9a, 0xa4, 0xcf, 0x6d, 0x7c, 0x04, 0x86, 0x88, 0x3c, 0x9a, 0x59, 0xa0,
+	0x34, 0xf1, 0xb3, 0x55, 0x6f, 0xfa, 0x34, 0x4b, 0x14, 0x81, 0x8c, 0xe2, 0x7d, 0x30, 0x38, 0xcd,
+	0x6e, 0x99, 0x55, 0x93, 0x27, 0x97, 0x7e, 0x65, 0x4a, 0xbf, 0xc7, 0xe6, 0x82, 0x2a, 0x01, 0xf9,
+	0x5c, 0xfa, 0x95, 0x89, 0x9b, 0xa0, 0xf3, 0xc4, 0x57, 0xf2, 0xb1, 0xf5, 0x53, 0x0e, 0x0b, 0x44,
+	0x06, 0xf1, 0xcf, 0x9b, 0xfa, 0xb9, 0xa3, 0xf4, 0xf3, 0xc5, 0x0a, 0xb9, 0xee, 0xdd, 0x5a, 0x42,
+	0x87, 0x85, 0x0d, 0x11, 0x6d, 0x7c, 0xb5, 0x29, 0x46, 0xfb, 0x50, 0xe2, 0x4c, 0xf5, 0x6f, 0x37,
+	0x57, 0xac, 0xdc, 0x6a, 0x94, 0xc1, 0xe8, 0xcb, 0x03, 0x75, 0xcb, 0x60, 0xa4, 0x61, 0x10, 0x85,
+	0xc7, 0x2f, 0xa1, 0xbc, 0x94, 0x7b, 0xb9, 0xe6, 0xb9, 0xe0, 0x9b, 0x48, 0x8a, 0xc2, 0xd9, 0xe0,
+	0x83, 0xa9, 0x1d, 0xb7, 0xa0, 0x28, 0x4b, 0x97, 0xc1, 0xd1, 0x64, 0xdc, 0x3f, 0xfd, 0xc5, 0x44,
+	0xb8, 0x06, 0xe5, 0xeb, 0x9b, 0xc1, 0x95, 0x34, 0x34, 0xa9, 0x1a, 0x97, 0x37, 0xe3, 0xfe, 0x85,
+	0x89, 0x1a, 0x9a, 0x89, 0x3a, 0x36, 0xe8, 0x82, 0xfa, 0x5b, 0xfb, 0xea, 0xab, 0x63, 0xc8, 0x50,
+	0xa7, 0xf7, 0xdf, 0x4a, 0x3e, 0xc7, 0xfc, 0xaa, 0xba, 0xf3, 0xe2, 0xe9, 0xa2, 0xfe, 0xff, 0x4e,
+	0x76, 0xdf, 0x7d, 0x78, 0xeb, 0x07, 0x62, 0x96, 0xde, 0xb6, 0xa6, 0x11, 0x3f, 0xf1, 0xa3, 0x39,
+	0x0d, 0xfd, 0x13, 0x75, 0x39, 0xde, 0xa6, 0x77, 0xf9, 0xcb, 0xf4, 0x95, 0xcf, 0xc2, 0x57, 0x7e,
+	0xa4, 0x6e, 0x55, 0xb9, 0x0f, 0x27, 0xcb, 0x6b, 0xf6, 0x27, 0xf9, 0xf8, 0x37, 0x00, 0x00, 0xff,
+	0xff, 0x12, 0xd5, 0x46, 0x00, 0x75, 0x07, 0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/my_test/test.pb.go.golden b/protoc-gen-go/testdata/my_test/test.pb.go.golden
deleted file mode 100644
index 1954e3f..0000000
--- a/protoc-gen-go/testdata/my_test/test.pb.go.golden
+++ /dev/null
@@ -1,870 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: my_test/test.proto
-
-/*
-Package my_test is a generated protocol buffer package.
-
-This package holds interesting messages.
-
-It is generated from these files:
-	my_test/test.proto
-
-It has these top-level messages:
-	Request
-	Reply
-	OtherBase
-	ReplyExtensions
-	OtherReplyExtensions
-	OldReply
-	Communique
-*/
-package my_test
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-import _ "github.com/golang/protobuf/protoc-gen-go/testdata/multi"
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type HatType int32
-
-const (
-	// deliberately skipping 0
-	HatType_FEDORA HatType = 1
-	HatType_FEZ    HatType = 2
-)
-
-var HatType_name = map[int32]string{
-	1: "FEDORA",
-	2: "FEZ",
-}
-var HatType_value = map[string]int32{
-	"FEDORA": 1,
-	"FEZ":    2,
-}
-
-func (x HatType) Enum() *HatType {
-	p := new(HatType)
-	*p = x
-	return p
-}
-func (x HatType) String() string {
-	return proto.EnumName(HatType_name, int32(x))
-}
-func (x *HatType) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(HatType_value, data, "HatType")
-	if err != nil {
-		return err
-	}
-	*x = HatType(value)
-	return nil
-}
-
-// This enum represents days of the week.
-type Days int32
-
-const (
-	Days_MONDAY  Days = 1
-	Days_TUESDAY Days = 2
-	Days_LUNDI   Days = 1
-)
-
-var Days_name = map[int32]string{
-	1: "MONDAY",
-	2: "TUESDAY",
-	// Duplicate value: 1: "LUNDI",
-}
-var Days_value = map[string]int32{
-	"MONDAY":  1,
-	"TUESDAY": 2,
-	"LUNDI":   1,
-}
-
-func (x Days) Enum() *Days {
-	p := new(Days)
-	*p = x
-	return p
-}
-func (x Days) String() string {
-	return proto.EnumName(Days_name, int32(x))
-}
-func (x *Days) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(Days_value, data, "Days")
-	if err != nil {
-		return err
-	}
-	*x = Days(value)
-	return nil
-}
-
-type Request_Color int32
-
-const (
-	Request_RED   Request_Color = 0
-	Request_GREEN Request_Color = 1
-	Request_BLUE  Request_Color = 2
-)
-
-var Request_Color_name = map[int32]string{
-	0: "RED",
-	1: "GREEN",
-	2: "BLUE",
-}
-var Request_Color_value = map[string]int32{
-	"RED":   0,
-	"GREEN": 1,
-	"BLUE":  2,
-}
-
-func (x Request_Color) Enum() *Request_Color {
-	p := new(Request_Color)
-	*p = x
-	return p
-}
-func (x Request_Color) String() string {
-	return proto.EnumName(Request_Color_name, int32(x))
-}
-func (x *Request_Color) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(Request_Color_value, data, "Request_Color")
-	if err != nil {
-		return err
-	}
-	*x = Request_Color(value)
-	return nil
-}
-
-type Reply_Entry_Game int32
-
-const (
-	Reply_Entry_FOOTBALL Reply_Entry_Game = 1
-	Reply_Entry_TENNIS   Reply_Entry_Game = 2
-)
-
-var Reply_Entry_Game_name = map[int32]string{
-	1: "FOOTBALL",
-	2: "TENNIS",
-}
-var Reply_Entry_Game_value = map[string]int32{
-	"FOOTBALL": 1,
-	"TENNIS":   2,
-}
-
-func (x Reply_Entry_Game) Enum() *Reply_Entry_Game {
-	p := new(Reply_Entry_Game)
-	*p = x
-	return p
-}
-func (x Reply_Entry_Game) String() string {
-	return proto.EnumName(Reply_Entry_Game_name, int32(x))
-}
-func (x *Reply_Entry_Game) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(Reply_Entry_Game_value, data, "Reply_Entry_Game")
-	if err != nil {
-		return err
-	}
-	*x = Reply_Entry_Game(value)
-	return nil
-}
-
-// This is a message that might be sent somewhere.
-type Request struct {
-	Key []int64 `protobuf:"varint,1,rep,name=key" json:"key,omitempty"`
-	//  optional imp.ImportedMessage imported_message = 2;
-	Hue *Request_Color `protobuf:"varint,3,opt,name=hue,enum=my.test.Request_Color" json:"hue,omitempty"`
-	Hat *HatType       `protobuf:"varint,4,opt,name=hat,enum=my.test.HatType,def=1" json:"hat,omitempty"`
-	//  optional imp.ImportedMessage.Owner owner = 6;
-	Deadline  *float32           `protobuf:"fixed32,7,opt,name=deadline,def=inf" json:"deadline,omitempty"`
-	Somegroup *Request_SomeGroup `protobuf:"group,8,opt,name=SomeGroup,json=somegroup" json:"somegroup,omitempty"`
-	// This is a map field. It will generate map[int32]string.
-	NameMapping map[int32]string `protobuf:"bytes,14,rep,name=name_mapping,json=nameMapping" json:"name_mapping,omitempty" protobuf_key:"varint,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	// This is a map field whose value type is a message.
-	MsgMapping map[int64]*Reply `protobuf:"bytes,15,rep,name=msg_mapping,json=msgMapping" json:"msg_mapping,omitempty" protobuf_key:"zigzag64,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
-	Reset_     *int32           `protobuf:"varint,12,opt,name=reset" json:"reset,omitempty"`
-	// This field should not conflict with any getters.
-	GetKey_          *string `protobuf:"bytes,16,opt,name=get_key,json=getKey" json:"get_key,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *Request) Reset()         { *m = Request{} }
-func (m *Request) String() string { return proto.CompactTextString(m) }
-func (*Request) ProtoMessage()    {}
-
-const Default_Request_Hat HatType = HatType_FEDORA
-
-var Default_Request_Deadline float32 = float32(math.Inf(1))
-
-func (m *Request) GetKey() []int64 {
-	if m != nil {
-		return m.Key
-	}
-	return nil
-}
-
-func (m *Request) GetHue() Request_Color {
-	if m != nil && m.Hue != nil {
-		return *m.Hue
-	}
-	return Request_RED
-}
-
-func (m *Request) GetHat() HatType {
-	if m != nil && m.Hat != nil {
-		return *m.Hat
-	}
-	return Default_Request_Hat
-}
-
-func (m *Request) GetDeadline() float32 {
-	if m != nil && m.Deadline != nil {
-		return *m.Deadline
-	}
-	return Default_Request_Deadline
-}
-
-func (m *Request) GetSomegroup() *Request_SomeGroup {
-	if m != nil {
-		return m.Somegroup
-	}
-	return nil
-}
-
-func (m *Request) GetNameMapping() map[int32]string {
-	if m != nil {
-		return m.NameMapping
-	}
-	return nil
-}
-
-func (m *Request) GetMsgMapping() map[int64]*Reply {
-	if m != nil {
-		return m.MsgMapping
-	}
-	return nil
-}
-
-func (m *Request) GetReset_() int32 {
-	if m != nil && m.Reset_ != nil {
-		return *m.Reset_
-	}
-	return 0
-}
-
-func (m *Request) GetGetKey_() string {
-	if m != nil && m.GetKey_ != nil {
-		return *m.GetKey_
-	}
-	return ""
-}
-
-type Request_SomeGroup struct {
-	GroupField       *int32 `protobuf:"varint,9,opt,name=group_field,json=groupField" json:"group_field,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *Request_SomeGroup) Reset()         { *m = Request_SomeGroup{} }
-func (m *Request_SomeGroup) String() string { return proto.CompactTextString(m) }
-func (*Request_SomeGroup) ProtoMessage()    {}
-
-func (m *Request_SomeGroup) GetGroupField() int32 {
-	if m != nil && m.GroupField != nil {
-		return *m.GroupField
-	}
-	return 0
-}
-
-type Reply struct {
-	Found                        []*Reply_Entry `protobuf:"bytes,1,rep,name=found" json:"found,omitempty"`
-	CompactKeys                  []int32        `protobuf:"varint,2,rep,packed,name=compact_keys,json=compactKeys" json:"compact_keys,omitempty"`
-	proto.XXX_InternalExtensions `json:"-"`
-	XXX_unrecognized             []byte `json:"-"`
-}
-
-func (m *Reply) Reset()         { *m = Reply{} }
-func (m *Reply) String() string { return proto.CompactTextString(m) }
-func (*Reply) ProtoMessage()    {}
-
-var extRange_Reply = []proto.ExtensionRange{
-	{100, 536870911},
-}
-
-func (*Reply) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_Reply
-}
-
-func (m *Reply) GetFound() []*Reply_Entry {
-	if m != nil {
-		return m.Found
-	}
-	return nil
-}
-
-func (m *Reply) GetCompactKeys() []int32 {
-	if m != nil {
-		return m.CompactKeys
-	}
-	return nil
-}
-
-type Reply_Entry struct {
-	KeyThatNeeds_1234Camel_CasIng *int64 `protobuf:"varint,1,req,name=key_that_needs_1234camel_CasIng,json=keyThatNeeds1234camelCasIng" json:"key_that_needs_1234camel_CasIng,omitempty"`
-	Value                         *int64 `protobuf:"varint,2,opt,name=value,def=7" json:"value,omitempty"`
-	XMyFieldName_2                *int64 `protobuf:"varint,3,opt,name=_my_field_name_2,json=MyFieldName2" json:"_my_field_name_2,omitempty"`
-	XXX_unrecognized              []byte `json:"-"`
-}
-
-func (m *Reply_Entry) Reset()         { *m = Reply_Entry{} }
-func (m *Reply_Entry) String() string { return proto.CompactTextString(m) }
-func (*Reply_Entry) ProtoMessage()    {}
-
-const Default_Reply_Entry_Value int64 = 7
-
-func (m *Reply_Entry) GetKeyThatNeeds_1234Camel_CasIng() int64 {
-	if m != nil && m.KeyThatNeeds_1234Camel_CasIng != nil {
-		return *m.KeyThatNeeds_1234Camel_CasIng
-	}
-	return 0
-}
-
-func (m *Reply_Entry) GetValue() int64 {
-	if m != nil && m.Value != nil {
-		return *m.Value
-	}
-	return Default_Reply_Entry_Value
-}
-
-func (m *Reply_Entry) GetXMyFieldName_2() int64 {
-	if m != nil && m.XMyFieldName_2 != nil {
-		return *m.XMyFieldName_2
-	}
-	return 0
-}
-
-type OtherBase struct {
-	Name                         *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	proto.XXX_InternalExtensions `json:"-"`
-	XXX_unrecognized             []byte `json:"-"`
-}
-
-func (m *OtherBase) Reset()         { *m = OtherBase{} }
-func (m *OtherBase) String() string { return proto.CompactTextString(m) }
-func (*OtherBase) ProtoMessage()    {}
-
-var extRange_OtherBase = []proto.ExtensionRange{
-	{100, 536870911},
-}
-
-func (*OtherBase) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_OtherBase
-}
-
-func (m *OtherBase) GetName() string {
-	if m != nil && m.Name != nil {
-		return *m.Name
-	}
-	return ""
-}
-
-type ReplyExtensions struct {
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *ReplyExtensions) Reset()         { *m = ReplyExtensions{} }
-func (m *ReplyExtensions) String() string { return proto.CompactTextString(m) }
-func (*ReplyExtensions) ProtoMessage()    {}
-
-var E_ReplyExtensions_Time = &proto.ExtensionDesc{
-	ExtendedType:  (*Reply)(nil),
-	ExtensionType: (*float64)(nil),
-	Field:         101,
-	Name:          "my.test.ReplyExtensions.time",
-	Tag:           "fixed64,101,opt,name=time",
-	Filename:      "my_test/test.proto",
-}
-
-var E_ReplyExtensions_Carrot = &proto.ExtensionDesc{
-	ExtendedType:  (*Reply)(nil),
-	ExtensionType: (*ReplyExtensions)(nil),
-	Field:         105,
-	Name:          "my.test.ReplyExtensions.carrot",
-	Tag:           "bytes,105,opt,name=carrot",
-	Filename:      "my_test/test.proto",
-}
-
-var E_ReplyExtensions_Donut = &proto.ExtensionDesc{
-	ExtendedType:  (*OtherBase)(nil),
-	ExtensionType: (*ReplyExtensions)(nil),
-	Field:         101,
-	Name:          "my.test.ReplyExtensions.donut",
-	Tag:           "bytes,101,opt,name=donut",
-	Filename:      "my_test/test.proto",
-}
-
-type OtherReplyExtensions struct {
-	Key              *int32 `protobuf:"varint,1,opt,name=key" json:"key,omitempty"`
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *OtherReplyExtensions) Reset()         { *m = OtherReplyExtensions{} }
-func (m *OtherReplyExtensions) String() string { return proto.CompactTextString(m) }
-func (*OtherReplyExtensions) ProtoMessage()    {}
-
-func (m *OtherReplyExtensions) GetKey() int32 {
-	if m != nil && m.Key != nil {
-		return *m.Key
-	}
-	return 0
-}
-
-type OldReply struct {
-	proto.XXX_InternalExtensions `json:"-"`
-	XXX_unrecognized             []byte `json:"-"`
-}
-
-func (m *OldReply) Reset()         { *m = OldReply{} }
-func (m *OldReply) String() string { return proto.CompactTextString(m) }
-func (*OldReply) ProtoMessage()    {}
-
-func (m *OldReply) Marshal() ([]byte, error) {
-	return proto.MarshalMessageSet(&m.XXX_InternalExtensions)
-}
-func (m *OldReply) Unmarshal(buf []byte) error {
-	return proto.UnmarshalMessageSet(buf, &m.XXX_InternalExtensions)
-}
-func (m *OldReply) MarshalJSON() ([]byte, error) {
-	return proto.MarshalMessageSetJSON(&m.XXX_InternalExtensions)
-}
-func (m *OldReply) UnmarshalJSON(buf []byte) error {
-	return proto.UnmarshalMessageSetJSON(buf, &m.XXX_InternalExtensions)
-}
-
-// ensure OldReply satisfies proto.Marshaler and proto.Unmarshaler
-var _ proto.Marshaler = (*OldReply)(nil)
-var _ proto.Unmarshaler = (*OldReply)(nil)
-
-var extRange_OldReply = []proto.ExtensionRange{
-	{100, 2147483646},
-}
-
-func (*OldReply) ExtensionRangeArray() []proto.ExtensionRange {
-	return extRange_OldReply
-}
-
-type Communique struct {
-	MakeMeCry *bool `protobuf:"varint,1,opt,name=make_me_cry,json=makeMeCry" json:"make_me_cry,omitempty"`
-	// This is a oneof, called "union".
-	//
-	// Types that are valid to be assigned to Union:
-	//	*Communique_Number
-	//	*Communique_Name
-	//	*Communique_Data
-	//	*Communique_TempC
-	//	*Communique_Height
-	//	*Communique_Today
-	//	*Communique_Maybe
-	//	*Communique_Delta_
-	//	*Communique_Msg
-	//	*Communique_Somegroup
-	Union            isCommunique_Union `protobuf_oneof:"union"`
-	XXX_unrecognized []byte             `json:"-"`
-}
-
-func (m *Communique) Reset()         { *m = Communique{} }
-func (m *Communique) String() string { return proto.CompactTextString(m) }
-func (*Communique) ProtoMessage()    {}
-
-type isCommunique_Union interface {
-	isCommunique_Union()
-}
-
-type Communique_Number struct {
-	Number int32 `protobuf:"varint,5,opt,name=number,oneof"`
-}
-type Communique_Name struct {
-	Name string `protobuf:"bytes,6,opt,name=name,oneof"`
-}
-type Communique_Data struct {
-	Data []byte `protobuf:"bytes,7,opt,name=data,oneof"`
-}
-type Communique_TempC struct {
-	TempC float64 `protobuf:"fixed64,8,opt,name=temp_c,json=tempC,oneof"`
-}
-type Communique_Height struct {
-	Height float32 `protobuf:"fixed32,9,opt,name=height,oneof"`
-}
-type Communique_Today struct {
-	Today Days `protobuf:"varint,10,opt,name=today,enum=my.test.Days,oneof"`
-}
-type Communique_Maybe struct {
-	Maybe bool `protobuf:"varint,11,opt,name=maybe,oneof"`
-}
-type Communique_Delta_ struct {
-	Delta int32 `protobuf:"zigzag32,12,opt,name=delta,oneof"`
-}
-type Communique_Msg struct {
-	Msg *Reply `protobuf:"bytes,13,opt,name=msg,oneof"`
-}
-type Communique_Somegroup struct {
-	Somegroup *Communique_SomeGroup `protobuf:"group,14,opt,name=SomeGroup,json=somegroup,oneof"`
-}
-
-func (*Communique_Number) isCommunique_Union()    {}
-func (*Communique_Name) isCommunique_Union()      {}
-func (*Communique_Data) isCommunique_Union()      {}
-func (*Communique_TempC) isCommunique_Union()     {}
-func (*Communique_Height) isCommunique_Union()    {}
-func (*Communique_Today) isCommunique_Union()     {}
-func (*Communique_Maybe) isCommunique_Union()     {}
-func (*Communique_Delta_) isCommunique_Union()    {}
-func (*Communique_Msg) isCommunique_Union()       {}
-func (*Communique_Somegroup) isCommunique_Union() {}
-
-func (m *Communique) GetUnion() isCommunique_Union {
-	if m != nil {
-		return m.Union
-	}
-	return nil
-}
-
-func (m *Communique) GetMakeMeCry() bool {
-	if m != nil && m.MakeMeCry != nil {
-		return *m.MakeMeCry
-	}
-	return false
-}
-
-func (m *Communique) GetNumber() int32 {
-	if x, ok := m.GetUnion().(*Communique_Number); ok {
-		return x.Number
-	}
-	return 0
-}
-
-func (m *Communique) GetName() string {
-	if x, ok := m.GetUnion().(*Communique_Name); ok {
-		return x.Name
-	}
-	return ""
-}
-
-func (m *Communique) GetData() []byte {
-	if x, ok := m.GetUnion().(*Communique_Data); ok {
-		return x.Data
-	}
-	return nil
-}
-
-func (m *Communique) GetTempC() float64 {
-	if x, ok := m.GetUnion().(*Communique_TempC); ok {
-		return x.TempC
-	}
-	return 0
-}
-
-func (m *Communique) GetHeight() float32 {
-	if x, ok := m.GetUnion().(*Communique_Height); ok {
-		return x.Height
-	}
-	return 0
-}
-
-func (m *Communique) GetToday() Days {
-	if x, ok := m.GetUnion().(*Communique_Today); ok {
-		return x.Today
-	}
-	return Days_MONDAY
-}
-
-func (m *Communique) GetMaybe() bool {
-	if x, ok := m.GetUnion().(*Communique_Maybe); ok {
-		return x.Maybe
-	}
-	return false
-}
-
-func (m *Communique) GetDelta() int32 {
-	if x, ok := m.GetUnion().(*Communique_Delta_); ok {
-		return x.Delta
-	}
-	return 0
-}
-
-func (m *Communique) GetMsg() *Reply {
-	if x, ok := m.GetUnion().(*Communique_Msg); ok {
-		return x.Msg
-	}
-	return nil
-}
-
-func (m *Communique) GetSomegroup() *Communique_SomeGroup {
-	if x, ok := m.GetUnion().(*Communique_Somegroup); ok {
-		return x.Somegroup
-	}
-	return nil
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*Communique) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _Communique_OneofMarshaler, _Communique_OneofUnmarshaler, _Communique_OneofSizer, []interface{}{
-		(*Communique_Number)(nil),
-		(*Communique_Name)(nil),
-		(*Communique_Data)(nil),
-		(*Communique_TempC)(nil),
-		(*Communique_Height)(nil),
-		(*Communique_Today)(nil),
-		(*Communique_Maybe)(nil),
-		(*Communique_Delta_)(nil),
-		(*Communique_Msg)(nil),
-		(*Communique_Somegroup)(nil),
-	}
-}
-
-func _Communique_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*Communique)
-	// union
-	switch x := m.Union.(type) {
-	case *Communique_Number:
-		b.EncodeVarint(5<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.Number))
-	case *Communique_Name:
-		b.EncodeVarint(6<<3 | proto.WireBytes)
-		b.EncodeStringBytes(x.Name)
-	case *Communique_Data:
-		b.EncodeVarint(7<<3 | proto.WireBytes)
-		b.EncodeRawBytes(x.Data)
-	case *Communique_TempC:
-		b.EncodeVarint(8<<3 | proto.WireFixed64)
-		b.EncodeFixed64(math.Float64bits(x.TempC))
-	case *Communique_Height:
-		b.EncodeVarint(9<<3 | proto.WireFixed32)
-		b.EncodeFixed32(uint64(math.Float32bits(x.Height)))
-	case *Communique_Today:
-		b.EncodeVarint(10<<3 | proto.WireVarint)
-		b.EncodeVarint(uint64(x.Today))
-	case *Communique_Maybe:
-		t := uint64(0)
-		if x.Maybe {
-			t = 1
-		}
-		b.EncodeVarint(11<<3 | proto.WireVarint)
-		b.EncodeVarint(t)
-	case *Communique_Delta_:
-		b.EncodeVarint(12<<3 | proto.WireVarint)
-		b.EncodeZigzag32(uint64(x.Delta))
-	case *Communique_Msg:
-		b.EncodeVarint(13<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.Msg); err != nil {
-			return err
-		}
-	case *Communique_Somegroup:
-		b.EncodeVarint(14<<3 | proto.WireStartGroup)
-		if err := b.Marshal(x.Somegroup); err != nil {
-			return err
-		}
-		b.EncodeVarint(14<<3 | proto.WireEndGroup)
-	case nil:
-	default:
-		return fmt.Errorf("Communique.Union has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _Communique_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*Communique)
-	switch tag {
-	case 5: // union.number
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Communique_Number{int32(x)}
-		return true, err
-	case 6: // union.name
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeStringBytes()
-		m.Union = &Communique_Name{x}
-		return true, err
-	case 7: // union.data
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeRawBytes(true)
-		m.Union = &Communique_Data{x}
-		return true, err
-	case 8: // union.temp_c
-		if wire != proto.WireFixed64 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed64()
-		m.Union = &Communique_TempC{math.Float64frombits(x)}
-		return true, err
-	case 9: // union.height
-		if wire != proto.WireFixed32 {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeFixed32()
-		m.Union = &Communique_Height{math.Float32frombits(uint32(x))}
-		return true, err
-	case 10: // union.today
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Communique_Today{Days(x)}
-		return true, err
-	case 11: // union.maybe
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeVarint()
-		m.Union = &Communique_Maybe{x != 0}
-		return true, err
-	case 12: // union.delta
-		if wire != proto.WireVarint {
-			return true, proto.ErrInternalBadWireType
-		}
-		x, err := b.DecodeZigzag32()
-		m.Union = &Communique_Delta_{int32(x)}
-		return true, err
-	case 13: // union.msg
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(Reply)
-		err := b.DecodeMessage(msg)
-		m.Union = &Communique_Msg{msg}
-		return true, err
-	case 14: // union.somegroup
-		if wire != proto.WireStartGroup {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(Communique_SomeGroup)
-		err := b.DecodeGroup(msg)
-		m.Union = &Communique_Somegroup{msg}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _Communique_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*Communique)
-	// union
-	switch x := m.Union.(type) {
-	case *Communique_Number:
-		n += proto.SizeVarint(5<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.Number))
-	case *Communique_Name:
-		n += proto.SizeVarint(6<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.Name)))
-		n += len(x.Name)
-	case *Communique_Data:
-		n += proto.SizeVarint(7<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(len(x.Data)))
-		n += len(x.Data)
-	case *Communique_TempC:
-		n += proto.SizeVarint(8<<3 | proto.WireFixed64)
-		n += 8
-	case *Communique_Height:
-		n += proto.SizeVarint(9<<3 | proto.WireFixed32)
-		n += 4
-	case *Communique_Today:
-		n += proto.SizeVarint(10<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64(x.Today))
-	case *Communique_Maybe:
-		n += proto.SizeVarint(11<<3 | proto.WireVarint)
-		n += 1
-	case *Communique_Delta_:
-		n += proto.SizeVarint(12<<3 | proto.WireVarint)
-		n += proto.SizeVarint(uint64((uint32(x.Delta) << 1) ^ uint32((int32(x.Delta) >> 31))))
-	case *Communique_Msg:
-		s := proto.Size(x.Msg)
-		n += proto.SizeVarint(13<<3 | proto.WireBytes)
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case *Communique_Somegroup:
-		n += proto.SizeVarint(14<<3 | proto.WireStartGroup)
-		n += proto.Size(x.Somegroup)
-		n += proto.SizeVarint(14<<3 | proto.WireEndGroup)
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-type Communique_SomeGroup struct {
-	Member           *string `protobuf:"bytes,15,opt,name=member" json:"member,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *Communique_SomeGroup) Reset()         { *m = Communique_SomeGroup{} }
-func (m *Communique_SomeGroup) String() string { return proto.CompactTextString(m) }
-func (*Communique_SomeGroup) ProtoMessage()    {}
-
-func (m *Communique_SomeGroup) GetMember() string {
-	if m != nil && m.Member != nil {
-		return *m.Member
-	}
-	return ""
-}
-
-type Communique_Delta struct {
-	XXX_unrecognized []byte `json:"-"`
-}
-
-func (m *Communique_Delta) Reset()         { *m = Communique_Delta{} }
-func (m *Communique_Delta) String() string { return proto.CompactTextString(m) }
-func (*Communique_Delta) ProtoMessage()    {}
-
-var E_Tag = &proto.ExtensionDesc{
-	ExtendedType:  (*Reply)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         103,
-	Name:          "my.test.tag",
-	Tag:           "bytes,103,opt,name=tag",
-	Filename:      "my_test/test.proto",
-}
-
-var E_Donut = &proto.ExtensionDesc{
-	ExtendedType:  (*Reply)(nil),
-	ExtensionType: (*OtherReplyExtensions)(nil),
-	Field:         106,
-	Name:          "my.test.donut",
-	Tag:           "bytes,106,opt,name=donut",
-	Filename:      "my_test/test.proto",
-}
-
-func init() {
-	proto.RegisterType((*Request)(nil), "my.test.Request")
-	proto.RegisterType((*Request_SomeGroup)(nil), "my.test.Request.SomeGroup")
-	proto.RegisterType((*Reply)(nil), "my.test.Reply")
-	proto.RegisterType((*Reply_Entry)(nil), "my.test.Reply.Entry")
-	proto.RegisterType((*OtherBase)(nil), "my.test.OtherBase")
-	proto.RegisterType((*ReplyExtensions)(nil), "my.test.ReplyExtensions")
-	proto.RegisterType((*OtherReplyExtensions)(nil), "my.test.OtherReplyExtensions")
-	proto.RegisterType((*OldReply)(nil), "my.test.OldReply")
-	proto.RegisterType((*Communique)(nil), "my.test.Communique")
-	proto.RegisterType((*Communique_SomeGroup)(nil), "my.test.Communique.SomeGroup")
-	proto.RegisterType((*Communique_Delta)(nil), "my.test.Communique.Delta")
-	proto.RegisterEnum("my.test.HatType", HatType_name, HatType_value)
-	proto.RegisterEnum("my.test.Days", Days_name, Days_value)
-	proto.RegisterEnum("my.test.Request_Color", Request_Color_name, Request_Color_value)
-	proto.RegisterEnum("my.test.Reply_Entry_Game", Reply_Entry_Game_name, Reply_Entry_Game_value)
-	proto.RegisterExtension(E_ReplyExtensions_Time)
-	proto.RegisterExtension(E_ReplyExtensions_Carrot)
-	proto.RegisterExtension(E_ReplyExtensions_Donut)
-	proto.RegisterExtension(E_Tag)
-	proto.RegisterExtension(E_Donut)
-}
diff --git a/protoc-gen-go/testdata/my_test/test.proto b/protoc-gen-go/testdata/my_test/test.proto
index 8e70946..1ef3fd0 100644
--- a/protoc-gen-go/testdata/my_test/test.proto
+++ b/protoc-gen-go/testdata/my_test/test.proto
@@ -34,6 +34,8 @@
 // This package holds interesting messages.
 package my.test;  // dotted package name
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/my_test;test";
+
 //import "imp.proto";
 import "multi/multi1.proto";  // unused import
 
@@ -145,7 +147,7 @@
     Days today = 10;
     bool maybe = 11;
     sint32 delta = 12;  // name will conflict with Delta below
-    Reply msg = 13;
+    Reply msg = 16;  // requires two bytes to encode field tag
     group SomeGroup = 14 {
       optional string member = 15;
     }
diff --git a/protoc-gen-go/testdata/proto3/proto3.pb.go b/protoc-gen-go/testdata/proto3/proto3.pb.go
new file mode 100644
index 0000000..3b0ad84
--- /dev/null
+++ b/protoc-gen-go/testdata/proto3/proto3.pb.go
@@ -0,0 +1,196 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: proto3/proto3.proto
+
+package proto3 // import "github.com/golang/protobuf/protoc-gen-go/testdata/proto3"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type Request_Flavour int32
+
+const (
+	Request_SWEET         Request_Flavour = 0
+	Request_SOUR          Request_Flavour = 1
+	Request_UMAMI         Request_Flavour = 2
+	Request_GOPHERLICIOUS Request_Flavour = 3
+)
+
+var Request_Flavour_name = map[int32]string{
+	0: "SWEET",
+	1: "SOUR",
+	2: "UMAMI",
+	3: "GOPHERLICIOUS",
+}
+var Request_Flavour_value = map[string]int32{
+	"SWEET":         0,
+	"SOUR":          1,
+	"UMAMI":         2,
+	"GOPHERLICIOUS": 3,
+}
+
+func (x Request_Flavour) String() string {
+	return proto.EnumName(Request_Flavour_name, int32(x))
+}
+func (Request_Flavour) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_a752e09251f17e01, []int{0, 0}
+}
+
+type Request struct {
+	Name                 string          `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Key                  []int64         `protobuf:"varint,2,rep,packed,name=key" json:"key,omitempty"`
+	Taste                Request_Flavour `protobuf:"varint,3,opt,name=taste,enum=proto3.Request_Flavour" json:"taste,omitempty"`
+	Book                 *Book           `protobuf:"bytes,4,opt,name=book" json:"book,omitempty"`
+	Unpacked             []int64         `protobuf:"varint,5,rep,name=unpacked" json:"unpacked,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
+}
+
+func (m *Request) Reset()         { *m = Request{} }
+func (m *Request) String() string { return proto.CompactTextString(m) }
+func (*Request) ProtoMessage()    {}
+func (*Request) Descriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_a752e09251f17e01, []int{0}
+}
+func (m *Request) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Request.Unmarshal(m, b)
+}
+func (m *Request) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Request.Marshal(b, m, deterministic)
+}
+func (dst *Request) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Request.Merge(dst, src)
+}
+func (m *Request) XXX_Size() int {
+	return xxx_messageInfo_Request.Size(m)
+}
+func (m *Request) XXX_DiscardUnknown() {
+	xxx_messageInfo_Request.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Request proto.InternalMessageInfo
+
+func (m *Request) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *Request) GetKey() []int64 {
+	if m != nil {
+		return m.Key
+	}
+	return nil
+}
+
+func (m *Request) GetTaste() Request_Flavour {
+	if m != nil {
+		return m.Taste
+	}
+	return Request_SWEET
+}
+
+func (m *Request) GetBook() *Book {
+	if m != nil {
+		return m.Book
+	}
+	return nil
+}
+
+func (m *Request) GetUnpacked() []int64 {
+	if m != nil {
+		return m.Unpacked
+	}
+	return nil
+}
+
+type Book struct {
+	Title                string   `protobuf:"bytes,1,opt,name=title" json:"title,omitempty"`
+	RawData              []byte   `protobuf:"bytes,2,opt,name=raw_data,json=rawData,proto3" json:"raw_data,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Book) Reset()         { *m = Book{} }
+func (m *Book) String() string { return proto.CompactTextString(m) }
+func (*Book) ProtoMessage()    {}
+func (*Book) Descriptor() ([]byte, []int) {
+	return fileDescriptor_proto3_a752e09251f17e01, []int{1}
+}
+func (m *Book) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Book.Unmarshal(m, b)
+}
+func (m *Book) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Book.Marshal(b, m, deterministic)
+}
+func (dst *Book) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Book.Merge(dst, src)
+}
+func (m *Book) XXX_Size() int {
+	return xxx_messageInfo_Book.Size(m)
+}
+func (m *Book) XXX_DiscardUnknown() {
+	xxx_messageInfo_Book.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Book proto.InternalMessageInfo
+
+func (m *Book) GetTitle() string {
+	if m != nil {
+		return m.Title
+	}
+	return ""
+}
+
+func (m *Book) GetRawData() []byte {
+	if m != nil {
+		return m.RawData
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Request)(nil), "proto3.Request")
+	proto.RegisterType((*Book)(nil), "proto3.Book")
+	proto.RegisterEnum("proto3.Request_Flavour", Request_Flavour_name, Request_Flavour_value)
+}
+
+func init() { proto.RegisterFile("proto3/proto3.proto", fileDescriptor_proto3_a752e09251f17e01) }
+
+var fileDescriptor_proto3_a752e09251f17e01 = []byte{
+	// 306 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x3c, 0x90, 0xcf, 0x4e, 0xf2, 0x40,
+	0x14, 0xc5, 0x99, 0xfe, 0xf9, 0x80, 0xfb, 0xa1, 0x19, 0xaf, 0x26, 0x8e, 0x1b, 0x33, 0x61, 0xd5,
+	0x0d, 0x25, 0xc1, 0x85, 0xc6, 0xb8, 0x11, 0x45, 0x25, 0x91, 0x60, 0x06, 0x89, 0x89, 0x1b, 0x33,
+	0x85, 0xb1, 0x92, 0x42, 0x07, 0xcb, 0x54, 0xe2, 0xcb, 0xfa, 0x2c, 0xa6, 0x9d, 0xe2, 0xea, 0x9e,
+	0x7b, 0xe7, 0xe4, 0x77, 0x32, 0x07, 0x0e, 0xd7, 0x99, 0x36, 0xfa, 0xac, 0x6b, 0x47, 0x58, 0x0e,
+	0xfc, 0x67, 0xb7, 0xf6, 0x0f, 0x81, 0xba, 0x50, 0x9f, 0xb9, 0xda, 0x18, 0x44, 0xf0, 0x52, 0xb9,
+	0x52, 0x8c, 0x70, 0x12, 0x34, 0x45, 0xa9, 0x91, 0x82, 0x9b, 0xa8, 0x6f, 0xe6, 0x70, 0x37, 0x70,
+	0x45, 0x21, 0xb1, 0x03, 0xbe, 0x91, 0x1b, 0xa3, 0x98, 0xcb, 0x49, 0xb0, 0xdf, 0x3b, 0x0e, 0x2b,
+	0x6e, 0x45, 0x09, 0xef, 0x96, 0xf2, 0x4b, 0xe7, 0x99, 0xb0, 0x2e, 0xe4, 0xe0, 0x45, 0x5a, 0x27,
+	0xcc, 0xe3, 0x24, 0xf8, 0xdf, 0x6b, 0xed, 0xdc, 0x7d, 0xad, 0x13, 0x51, 0xbe, 0xe0, 0x29, 0x34,
+	0xf2, 0x74, 0x2d, 0x67, 0x89, 0x9a, 0x33, 0xbf, 0xc8, 0xe9, 0x3b, 0xb4, 0x26, 0xfe, 0x6e, 0xed,
+	0x2b, 0xa8, 0x57, 0x4c, 0x6c, 0x82, 0x3f, 0x79, 0x19, 0x0c, 0x9e, 0x69, 0x0d, 0x1b, 0xe0, 0x4d,
+	0xc6, 0x53, 0x41, 0x49, 0x71, 0x9c, 0x8e, 0xae, 0x47, 0x43, 0xea, 0xe0, 0x01, 0xec, 0xdd, 0x8f,
+	0x9f, 0x1e, 0x06, 0xe2, 0x71, 0x78, 0x33, 0x1c, 0x4f, 0x27, 0xd4, 0x6d, 0x9f, 0x83, 0x57, 0x64,
+	0xe1, 0x11, 0xf8, 0x66, 0x61, 0x96, 0xbb, 0xdf, 0xd9, 0x05, 0x4f, 0xa0, 0x91, 0xc9, 0xed, 0xdb,
+	0x5c, 0x1a, 0xc9, 0x1c, 0x4e, 0x82, 0x96, 0xa8, 0x67, 0x72, 0x7b, 0x2b, 0x8d, 0xec, 0x5f, 0xbe,
+	0x5e, 0xc4, 0x0b, 0xf3, 0x91, 0x47, 0xe1, 0x4c, 0xaf, 0xba, 0xb1, 0x5e, 0xca, 0x34, 0xb6, 0x1d,
+	0x46, 0xf9, 0xbb, 0x15, 0xb3, 0x4e, 0xac, 0xd2, 0x4e, 0xac, 0xbb, 0x46, 0x6d, 0x4c, 0xc1, 0xa8,
+	0x3a, 0x8e, 0xaa, 0x76, 0x7f, 0x03, 0x00, 0x00, 0xff, 0xff, 0xec, 0x71, 0xee, 0xdb, 0x7b, 0x01,
+	0x00, 0x00,
+}
diff --git a/protoc-gen-go/testdata/proto3.proto b/protoc-gen-go/testdata/proto3/proto3.proto
similarity index 95%
rename from protoc-gen-go/testdata/proto3.proto
rename to protoc-gen-go/testdata/proto3/proto3.proto
index 869b9af..79954e4 100644
--- a/protoc-gen-go/testdata/proto3.proto
+++ b/protoc-gen-go/testdata/proto3/proto3.proto
@@ -33,6 +33,8 @@
 
 package proto3;
 
+option go_package = "github.com/golang/protobuf/protoc-gen-go/testdata/proto3";
+
 message Request {
   enum Flavour {
     SWEET = 0;
diff --git a/ptypes/any/any.pb.go b/ptypes/any/any.pb.go
index 493674a..f67edc7 100644
--- a/ptypes/any/any.pb.go
+++ b/ptypes/any/any.pb.go
@@ -1,16 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: google/protobuf/any.proto
 
-/*
-Package any is a generated protocol buffer package.
-
-It is generated from these files:
-	google/protobuf/any.proto
-
-It has these top-level messages:
-	Any
-*/
-package any
+package any // import "github.com/golang/protobuf/ptypes/any"
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -52,7 +43,7 @@
 //       foo = any.unpack(Foo.class);
 //     }
 //
-// Example 3: Pack and unpack a message in Python.
+//  Example 3: Pack and unpack a message in Python.
 //
 //     foo = Foo(...)
 //     any = Any()
@@ -62,7 +53,7 @@
 //       any.Unpack(foo)
 //       ...
 //
-// Example 4: Pack and unpack a message in Go
+//  Example 4: Pack and unpack a message in Go
 //
 //      foo := &pb.Foo{...}
 //      any, err := ptypes.MarshalAny(foo)
@@ -80,7 +71,7 @@
 //
 //
 // JSON
-//
+// ====
 // The JSON representation of an `Any` value uses the regular
 // representation of the deserialized, embedded message, with an
 // additional field `@type` which contains the type URL. Example:
@@ -132,14 +123,36 @@
 	//
 	TypeUrl string `protobuf:"bytes,1,opt,name=type_url,json=typeUrl" json:"type_url,omitempty"`
 	// Must be a valid serialized protocol buffer of the above specified type.
-	Value []byte `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+	Value                []byte   `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *Any) Reset()                    { *m = Any{} }
-func (m *Any) String() string            { return proto.CompactTextString(m) }
-func (*Any) ProtoMessage()               {}
-func (*Any) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-func (*Any) XXX_WellKnownType() string   { return "Any" }
+func (m *Any) Reset()         { *m = Any{} }
+func (m *Any) String() string { return proto.CompactTextString(m) }
+func (*Any) ProtoMessage()    {}
+func (*Any) Descriptor() ([]byte, []int) {
+	return fileDescriptor_any_744b9ca530f228db, []int{0}
+}
+func (*Any) XXX_WellKnownType() string { return "Any" }
+func (m *Any) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Any.Unmarshal(m, b)
+}
+func (m *Any) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Any.Marshal(b, m, deterministic)
+}
+func (dst *Any) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Any.Merge(dst, src)
+}
+func (m *Any) XXX_Size() int {
+	return xxx_messageInfo_Any.Size(m)
+}
+func (m *Any) XXX_DiscardUnknown() {
+	xxx_messageInfo_Any.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Any proto.InternalMessageInfo
 
 func (m *Any) GetTypeUrl() string {
 	if m != nil {
@@ -159,9 +172,9 @@
 	proto.RegisterType((*Any)(nil), "google.protobuf.Any")
 }
 
-func init() { proto.RegisterFile("google/protobuf/any.proto", fileDescriptor0) }
+func init() { proto.RegisterFile("google/protobuf/any.proto", fileDescriptor_any_744b9ca530f228db) }
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_any_744b9ca530f228db = []byte{
 	// 185 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4c, 0xcf, 0xcf, 0x4f,
 	0xcf, 0x49, 0xd5, 0x2f, 0x28, 0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x4f, 0xcc, 0xab, 0xd4,
diff --git a/ptypes/any/any.proto b/ptypes/any/any.proto
index 9d805e1..c748667 100644
--- a/ptypes/any/any.proto
+++ b/ptypes/any/any.proto
@@ -64,7 +64,7 @@
 //       foo = any.unpack(Foo.class);
 //     }
 //
-// Example 3: Pack and unpack a message in Python.
+//  Example 3: Pack and unpack a message in Python.
 //
 //     foo = Foo(...)
 //     any = Any()
@@ -74,7 +74,7 @@
 //       any.Unpack(foo)
 //       ...
 //
-// Example 4: Pack and unpack a message in Go
+//  Example 4: Pack and unpack a message in Go
 //
 //      foo := &pb.Foo{...}
 //      any, err := ptypes.MarshalAny(foo)
@@ -92,7 +92,7 @@
 //
 //
 // JSON
-//
+// ====
 // The JSON representation of an `Any` value uses the regular
 // representation of the deserialized, embedded message, with an
 // additional field `@type` which contains the type URL. Example:
diff --git a/ptypes/duration/duration.pb.go b/ptypes/duration/duration.pb.go
index b2410a0..4d75473 100644
--- a/ptypes/duration/duration.pb.go
+++ b/ptypes/duration/duration.pb.go
@@ -1,16 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: google/protobuf/duration.proto
 
-/*
-Package duration is a generated protocol buffer package.
-
-It is generated from these files:
-	google/protobuf/duration.proto
-
-It has these top-level messages:
-	Duration
-*/
-package duration
+package duration // import "github.com/golang/protobuf/ptypes/duration"
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -98,14 +89,36 @@
 	// of one second or more, a non-zero value for the `nanos` field must be
 	// of the same sign as the `seconds` field. Must be from -999,999,999
 	// to +999,999,999 inclusive.
-	Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
+	Nanos                int32    `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *Duration) Reset()                    { *m = Duration{} }
-func (m *Duration) String() string            { return proto.CompactTextString(m) }
-func (*Duration) ProtoMessage()               {}
-func (*Duration) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-func (*Duration) XXX_WellKnownType() string   { return "Duration" }
+func (m *Duration) Reset()         { *m = Duration{} }
+func (m *Duration) String() string { return proto.CompactTextString(m) }
+func (*Duration) ProtoMessage()    {}
+func (*Duration) Descriptor() ([]byte, []int) {
+	return fileDescriptor_duration_e7d612259e3f0613, []int{0}
+}
+func (*Duration) XXX_WellKnownType() string { return "Duration" }
+func (m *Duration) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Duration.Unmarshal(m, b)
+}
+func (m *Duration) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Duration.Marshal(b, m, deterministic)
+}
+func (dst *Duration) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Duration.Merge(dst, src)
+}
+func (m *Duration) XXX_Size() int {
+	return xxx_messageInfo_Duration.Size(m)
+}
+func (m *Duration) XXX_DiscardUnknown() {
+	xxx_messageInfo_Duration.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Duration proto.InternalMessageInfo
 
 func (m *Duration) GetSeconds() int64 {
 	if m != nil {
@@ -125,9 +138,11 @@
 	proto.RegisterType((*Duration)(nil), "google.protobuf.Duration")
 }
 
-func init() { proto.RegisterFile("google/protobuf/duration.proto", fileDescriptor0) }
+func init() {
+	proto.RegisterFile("google/protobuf/duration.proto", fileDescriptor_duration_e7d612259e3f0613)
+}
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_duration_e7d612259e3f0613 = []byte{
 	// 190 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4b, 0xcf, 0xcf, 0x4f,
 	0xcf, 0x49, 0xd5, 0x2f, 0x28, 0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x4f, 0x29, 0x2d, 0x4a,
diff --git a/ptypes/empty/empty.pb.go b/ptypes/empty/empty.pb.go
index e877b72..a69b403 100644
--- a/ptypes/empty/empty.pb.go
+++ b/ptypes/empty/empty.pb.go
@@ -1,16 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: google/protobuf/empty.proto
 
-/*
-Package empty is a generated protocol buffer package.
-
-It is generated from these files:
-	google/protobuf/empty.proto
-
-It has these top-level messages:
-	Empty
-*/
-package empty
+package empty // import "github.com/golang/protobuf/ptypes/empty"
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -37,21 +28,43 @@
 //
 // The JSON representation for `Empty` is empty JSON object `{}`.
 type Empty struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *Empty) Reset()                    { *m = Empty{} }
-func (m *Empty) String() string            { return proto.CompactTextString(m) }
-func (*Empty) ProtoMessage()               {}
-func (*Empty) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-func (*Empty) XXX_WellKnownType() string   { return "Empty" }
+func (m *Empty) Reset()         { *m = Empty{} }
+func (m *Empty) String() string { return proto.CompactTextString(m) }
+func (*Empty) ProtoMessage()    {}
+func (*Empty) Descriptor() ([]byte, []int) {
+	return fileDescriptor_empty_39e6d6db0632e5b2, []int{0}
+}
+func (*Empty) XXX_WellKnownType() string { return "Empty" }
+func (m *Empty) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Empty.Unmarshal(m, b)
+}
+func (m *Empty) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Empty.Marshal(b, m, deterministic)
+}
+func (dst *Empty) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Empty.Merge(dst, src)
+}
+func (m *Empty) XXX_Size() int {
+	return xxx_messageInfo_Empty.Size(m)
+}
+func (m *Empty) XXX_DiscardUnknown() {
+	xxx_messageInfo_Empty.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Empty proto.InternalMessageInfo
 
 func init() {
 	proto.RegisterType((*Empty)(nil), "google.protobuf.Empty")
 }
 
-func init() { proto.RegisterFile("google/protobuf/empty.proto", fileDescriptor0) }
+func init() { proto.RegisterFile("google/protobuf/empty.proto", fileDescriptor_empty_39e6d6db0632e5b2) }
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_empty_39e6d6db0632e5b2 = []byte{
 	// 148 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4e, 0xcf, 0xcf, 0x4f,
 	0xcf, 0x49, 0xd5, 0x2f, 0x28, 0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x4f, 0xcd, 0x2d, 0x28,
diff --git a/ptypes/regen.sh b/ptypes/regen.sh
deleted file mode 100755
index b50a941..0000000
--- a/ptypes/regen.sh
+++ /dev/null
@@ -1,43 +0,0 @@
-#!/bin/bash -e
-#
-# This script fetches and rebuilds the "well-known types" protocol buffers.
-# To run this you will need protoc and goprotobuf installed;
-# see https://github.com/golang/protobuf for instructions.
-# You also need Go and Git installed.
-
-PKG=github.com/golang/protobuf/ptypes
-UPSTREAM=https://github.com/google/protobuf
-UPSTREAM_SUBDIR=src/google/protobuf
-PROTO_FILES=(any duration empty struct timestamp wrappers)
-
-function die() {
-  echo 1>&2 $*
-  exit 1
-}
-
-# Sanity check that the right tools are accessible.
-for tool in go git protoc protoc-gen-go; do
-  q=$(which $tool) || die "didn't find $tool"
-  echo 1>&2 "$tool: $q"
-done
-
-tmpdir=$(mktemp -d -t regen-wkt.XXXXXX)
-trap 'rm -rf $tmpdir' EXIT
-
-echo -n 1>&2 "finding package dir... "
-pkgdir=$(go list -f '{{.Dir}}' $PKG)
-echo 1>&2 $pkgdir
-base=$(echo $pkgdir | sed "s,/$PKG\$,,")
-echo 1>&2 "base: $base"
-cd "$base"
-
-echo 1>&2 "fetching latest protos... "
-git clone -q $UPSTREAM $tmpdir
-
-for file in ${PROTO_FILES[@]}; do
-  echo 1>&2 "* $file"
-  protoc --go_out=. -I$tmpdir/src $tmpdir/src/google/protobuf/$file.proto || die
-  cp $tmpdir/src/google/protobuf/$file.proto $PKG/$file
-done
-
-echo 1>&2 "All OK"
diff --git a/ptypes/struct/struct.pb.go b/ptypes/struct/struct.pb.go
index 4cfe608..442c0e0 100644
--- a/ptypes/struct/struct.pb.go
+++ b/ptypes/struct/struct.pb.go
@@ -1,18 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: google/protobuf/struct.proto
 
-/*
-Package structpb is a generated protocol buffer package.
-
-It is generated from these files:
-	google/protobuf/struct.proto
-
-It has these top-level messages:
-	Struct
-	Value
-	ListValue
-*/
-package structpb
+package structpb // import "github.com/golang/protobuf/ptypes/struct"
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -50,8 +39,10 @@
 func (x NullValue) String() string {
 	return proto.EnumName(NullValue_name, int32(x))
 }
-func (NullValue) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-func (NullValue) XXX_WellKnownType() string       { return "NullValue" }
+func (NullValue) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_struct_3a5a94e0c7801b27, []int{0}
+}
+func (NullValue) XXX_WellKnownType() string { return "NullValue" }
 
 // `Struct` represents a structured data value, consisting of fields
 // which map to dynamically typed values. In some languages, `Struct`
@@ -63,14 +54,36 @@
 // The JSON representation for `Struct` is JSON object.
 type Struct struct {
 	// Unordered map of dynamically typed values.
-	Fields map[string]*Value `protobuf:"bytes,1,rep,name=fields" json:"fields,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Fields               map[string]*Value `protobuf:"bytes,1,rep,name=fields" json:"fields,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
 }
 
-func (m *Struct) Reset()                    { *m = Struct{} }
-func (m *Struct) String() string            { return proto.CompactTextString(m) }
-func (*Struct) ProtoMessage()               {}
-func (*Struct) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-func (*Struct) XXX_WellKnownType() string   { return "Struct" }
+func (m *Struct) Reset()         { *m = Struct{} }
+func (m *Struct) String() string { return proto.CompactTextString(m) }
+func (*Struct) ProtoMessage()    {}
+func (*Struct) Descriptor() ([]byte, []int) {
+	return fileDescriptor_struct_3a5a94e0c7801b27, []int{0}
+}
+func (*Struct) XXX_WellKnownType() string { return "Struct" }
+func (m *Struct) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Struct.Unmarshal(m, b)
+}
+func (m *Struct) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Struct.Marshal(b, m, deterministic)
+}
+func (dst *Struct) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Struct.Merge(dst, src)
+}
+func (m *Struct) XXX_Size() int {
+	return xxx_messageInfo_Struct.Size(m)
+}
+func (m *Struct) XXX_DiscardUnknown() {
+	xxx_messageInfo_Struct.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Struct proto.InternalMessageInfo
 
 func (m *Struct) GetFields() map[string]*Value {
 	if m != nil {
@@ -95,14 +108,36 @@
 	//	*Value_BoolValue
 	//	*Value_StructValue
 	//	*Value_ListValue
-	Kind isValue_Kind `protobuf_oneof:"kind"`
+	Kind                 isValue_Kind `protobuf_oneof:"kind"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
 }
 
-func (m *Value) Reset()                    { *m = Value{} }
-func (m *Value) String() string            { return proto.CompactTextString(m) }
-func (*Value) ProtoMessage()               {}
-func (*Value) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
-func (*Value) XXX_WellKnownType() string   { return "Value" }
+func (m *Value) Reset()         { *m = Value{} }
+func (m *Value) String() string { return proto.CompactTextString(m) }
+func (*Value) ProtoMessage()    {}
+func (*Value) Descriptor() ([]byte, []int) {
+	return fileDescriptor_struct_3a5a94e0c7801b27, []int{1}
+}
+func (*Value) XXX_WellKnownType() string { return "Value" }
+func (m *Value) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Value.Unmarshal(m, b)
+}
+func (m *Value) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Value.Marshal(b, m, deterministic)
+}
+func (dst *Value) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Value.Merge(dst, src)
+}
+func (m *Value) XXX_Size() int {
+	return xxx_messageInfo_Value.Size(m)
+}
+func (m *Value) XXX_DiscardUnknown() {
+	xxx_messageInfo_Value.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Value proto.InternalMessageInfo
 
 type isValue_Kind interface {
 	isValue_Kind()
@@ -289,26 +324,26 @@
 	// kind
 	switch x := m.Kind.(type) {
 	case *Value_NullValue:
-		n += proto.SizeVarint(1<<3 | proto.WireVarint)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(x.NullValue))
 	case *Value_NumberValue:
-		n += proto.SizeVarint(2<<3 | proto.WireFixed64)
+		n += 1 // tag and wire
 		n += 8
 	case *Value_StringValue:
-		n += proto.SizeVarint(3<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(len(x.StringValue)))
 		n += len(x.StringValue)
 	case *Value_BoolValue:
-		n += proto.SizeVarint(4<<3 | proto.WireVarint)
+		n += 1 // tag and wire
 		n += 1
 	case *Value_StructValue:
 		s := proto.Size(x.StructValue)
-		n += proto.SizeVarint(5<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(s))
 		n += s
 	case *Value_ListValue:
 		s := proto.Size(x.ListValue)
-		n += proto.SizeVarint(6<<3 | proto.WireBytes)
+		n += 1 // tag and wire
 		n += proto.SizeVarint(uint64(s))
 		n += s
 	case nil:
@@ -323,14 +358,36 @@
 // The JSON representation for `ListValue` is JSON array.
 type ListValue struct {
 	// Repeated field of dynamically typed values.
-	Values []*Value `protobuf:"bytes,1,rep,name=values" json:"values,omitempty"`
+	Values               []*Value `protobuf:"bytes,1,rep,name=values" json:"values,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *ListValue) Reset()                    { *m = ListValue{} }
-func (m *ListValue) String() string            { return proto.CompactTextString(m) }
-func (*ListValue) ProtoMessage()               {}
-func (*ListValue) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
-func (*ListValue) XXX_WellKnownType() string   { return "ListValue" }
+func (m *ListValue) Reset()         { *m = ListValue{} }
+func (m *ListValue) String() string { return proto.CompactTextString(m) }
+func (*ListValue) ProtoMessage()    {}
+func (*ListValue) Descriptor() ([]byte, []int) {
+	return fileDescriptor_struct_3a5a94e0c7801b27, []int{2}
+}
+func (*ListValue) XXX_WellKnownType() string { return "ListValue" }
+func (m *ListValue) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListValue.Unmarshal(m, b)
+}
+func (m *ListValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListValue.Marshal(b, m, deterministic)
+}
+func (dst *ListValue) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListValue.Merge(dst, src)
+}
+func (m *ListValue) XXX_Size() int {
+	return xxx_messageInfo_ListValue.Size(m)
+}
+func (m *ListValue) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListValue.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListValue proto.InternalMessageInfo
 
 func (m *ListValue) GetValues() []*Value {
 	if m != nil {
@@ -341,14 +398,17 @@
 
 func init() {
 	proto.RegisterType((*Struct)(nil), "google.protobuf.Struct")
+	proto.RegisterMapType((map[string]*Value)(nil), "google.protobuf.Struct.FieldsEntry")
 	proto.RegisterType((*Value)(nil), "google.protobuf.Value")
 	proto.RegisterType((*ListValue)(nil), "google.protobuf.ListValue")
 	proto.RegisterEnum("google.protobuf.NullValue", NullValue_name, NullValue_value)
 }
 
-func init() { proto.RegisterFile("google/protobuf/struct.proto", fileDescriptor0) }
+func init() {
+	proto.RegisterFile("google/protobuf/struct.proto", fileDescriptor_struct_3a5a94e0c7801b27)
+}
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_struct_3a5a94e0c7801b27 = []byte{
 	// 417 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0x92, 0x41, 0x8b, 0xd3, 0x40,
 	0x14, 0xc7, 0x3b, 0xc9, 0x36, 0x98, 0x17, 0x59, 0x97, 0x11, 0xb4, 0xac, 0xa2, 0xa1, 0x7b, 0x09,
diff --git a/ptypes/timestamp/timestamp.pb.go b/ptypes/timestamp/timestamp.pb.go
index e23e4a2..e9c2222 100644
--- a/ptypes/timestamp/timestamp.pb.go
+++ b/ptypes/timestamp/timestamp.pb.go
@@ -1,16 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: google/protobuf/timestamp.proto
 
-/*
-Package timestamp is a generated protocol buffer package.
-
-It is generated from these files:
-	google/protobuf/timestamp.proto
-
-It has these top-level messages:
-	Timestamp
-*/
-package timestamp
+package timestamp // import "github.com/golang/protobuf/ptypes/timestamp"
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -101,7 +92,7 @@
 // to this format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
 // with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one
 // can use the Joda Time's [`ISODateTimeFormat.dateTime()`](
-// http://joda-time.sourceforge.net/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime())
+// http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime--)
 // to obtain a formatter capable of generating timestamps in this format.
 //
 //
@@ -114,14 +105,36 @@
 	// second values with fractions must still have non-negative nanos values
 	// that count forward in time. Must be from 0 to 999,999,999
 	// inclusive.
-	Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
+	Nanos                int32    `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *Timestamp) Reset()                    { *m = Timestamp{} }
-func (m *Timestamp) String() string            { return proto.CompactTextString(m) }
-func (*Timestamp) ProtoMessage()               {}
-func (*Timestamp) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-func (*Timestamp) XXX_WellKnownType() string   { return "Timestamp" }
+func (m *Timestamp) Reset()         { *m = Timestamp{} }
+func (m *Timestamp) String() string { return proto.CompactTextString(m) }
+func (*Timestamp) ProtoMessage()    {}
+func (*Timestamp) Descriptor() ([]byte, []int) {
+	return fileDescriptor_timestamp_b826e8e5fba671a8, []int{0}
+}
+func (*Timestamp) XXX_WellKnownType() string { return "Timestamp" }
+func (m *Timestamp) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Timestamp.Unmarshal(m, b)
+}
+func (m *Timestamp) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Timestamp.Marshal(b, m, deterministic)
+}
+func (dst *Timestamp) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Timestamp.Merge(dst, src)
+}
+func (m *Timestamp) XXX_Size() int {
+	return xxx_messageInfo_Timestamp.Size(m)
+}
+func (m *Timestamp) XXX_DiscardUnknown() {
+	xxx_messageInfo_Timestamp.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Timestamp proto.InternalMessageInfo
 
 func (m *Timestamp) GetSeconds() int64 {
 	if m != nil {
@@ -141,9 +154,11 @@
 	proto.RegisterType((*Timestamp)(nil), "google.protobuf.Timestamp")
 }
 
-func init() { proto.RegisterFile("google/protobuf/timestamp.proto", fileDescriptor0) }
+func init() {
+	proto.RegisterFile("google/protobuf/timestamp.proto", fileDescriptor_timestamp_b826e8e5fba671a8)
+}
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_timestamp_b826e8e5fba671a8 = []byte{
 	// 191 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4f, 0xcf, 0xcf, 0x4f,
 	0xcf, 0x49, 0xd5, 0x2f, 0x28, 0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x2f, 0xc9, 0xcc, 0x4d,
diff --git a/ptypes/timestamp/timestamp.proto b/ptypes/timestamp/timestamp.proto
index b7cbd17..06750ab 100644
--- a/ptypes/timestamp/timestamp.proto
+++ b/ptypes/timestamp/timestamp.proto
@@ -114,7 +114,7 @@
 // to this format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
 // with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one
 // can use the Joda Time's [`ISODateTimeFormat.dateTime()`](
-// http://joda-time.sourceforge.net/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime())
+// http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime--)
 // to obtain a formatter capable of generating timestamps in this format.
 //
 //
diff --git a/ptypes/wrappers/wrappers.pb.go b/ptypes/wrappers/wrappers.pb.go
index 0ed59bf..d1fc4d0 100644
--- a/ptypes/wrappers/wrappers.pb.go
+++ b/ptypes/wrappers/wrappers.pb.go
@@ -1,24 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: google/protobuf/wrappers.proto
 
-/*
-Package wrappers is a generated protocol buffer package.
-
-It is generated from these files:
-	google/protobuf/wrappers.proto
-
-It has these top-level messages:
-	DoubleValue
-	FloatValue
-	Int64Value
-	UInt64Value
-	Int32Value
-	UInt32Value
-	BoolValue
-	StringValue
-	BytesValue
-*/
-package wrappers
+package wrappers // import "github.com/golang/protobuf/ptypes/wrappers"
 
 import proto "github.com/golang/protobuf/proto"
 import fmt "fmt"
@@ -40,14 +23,36 @@
 // The JSON representation for `DoubleValue` is JSON number.
 type DoubleValue struct {
 	// The double value.
-	Value float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"`
+	Value                float64  `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *DoubleValue) Reset()                    { *m = DoubleValue{} }
-func (m *DoubleValue) String() string            { return proto.CompactTextString(m) }
-func (*DoubleValue) ProtoMessage()               {}
-func (*DoubleValue) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
-func (*DoubleValue) XXX_WellKnownType() string   { return "DoubleValue" }
+func (m *DoubleValue) Reset()         { *m = DoubleValue{} }
+func (m *DoubleValue) String() string { return proto.CompactTextString(m) }
+func (*DoubleValue) ProtoMessage()    {}
+func (*DoubleValue) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{0}
+}
+func (*DoubleValue) XXX_WellKnownType() string { return "DoubleValue" }
+func (m *DoubleValue) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DoubleValue.Unmarshal(m, b)
+}
+func (m *DoubleValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DoubleValue.Marshal(b, m, deterministic)
+}
+func (dst *DoubleValue) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DoubleValue.Merge(dst, src)
+}
+func (m *DoubleValue) XXX_Size() int {
+	return xxx_messageInfo_DoubleValue.Size(m)
+}
+func (m *DoubleValue) XXX_DiscardUnknown() {
+	xxx_messageInfo_DoubleValue.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DoubleValue proto.InternalMessageInfo
 
 func (m *DoubleValue) GetValue() float64 {
 	if m != nil {
@@ -61,14 +66,36 @@
 // The JSON representation for `FloatValue` is JSON number.
 type FloatValue struct {
 	// The float value.
-	Value float32 `protobuf:"fixed32,1,opt,name=value" json:"value,omitempty"`
+	Value                float32  `protobuf:"fixed32,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *FloatValue) Reset()                    { *m = FloatValue{} }
-func (m *FloatValue) String() string            { return proto.CompactTextString(m) }
-func (*FloatValue) ProtoMessage()               {}
-func (*FloatValue) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
-func (*FloatValue) XXX_WellKnownType() string   { return "FloatValue" }
+func (m *FloatValue) Reset()         { *m = FloatValue{} }
+func (m *FloatValue) String() string { return proto.CompactTextString(m) }
+func (*FloatValue) ProtoMessage()    {}
+func (*FloatValue) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{1}
+}
+func (*FloatValue) XXX_WellKnownType() string { return "FloatValue" }
+func (m *FloatValue) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FloatValue.Unmarshal(m, b)
+}
+func (m *FloatValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FloatValue.Marshal(b, m, deterministic)
+}
+func (dst *FloatValue) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FloatValue.Merge(dst, src)
+}
+func (m *FloatValue) XXX_Size() int {
+	return xxx_messageInfo_FloatValue.Size(m)
+}
+func (m *FloatValue) XXX_DiscardUnknown() {
+	xxx_messageInfo_FloatValue.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FloatValue proto.InternalMessageInfo
 
 func (m *FloatValue) GetValue() float32 {
 	if m != nil {
@@ -82,14 +109,36 @@
 // The JSON representation for `Int64Value` is JSON string.
 type Int64Value struct {
 	// The int64 value.
-	Value int64 `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	Value                int64    `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *Int64Value) Reset()                    { *m = Int64Value{} }
-func (m *Int64Value) String() string            { return proto.CompactTextString(m) }
-func (*Int64Value) ProtoMessage()               {}
-func (*Int64Value) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
-func (*Int64Value) XXX_WellKnownType() string   { return "Int64Value" }
+func (m *Int64Value) Reset()         { *m = Int64Value{} }
+func (m *Int64Value) String() string { return proto.CompactTextString(m) }
+func (*Int64Value) ProtoMessage()    {}
+func (*Int64Value) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{2}
+}
+func (*Int64Value) XXX_WellKnownType() string { return "Int64Value" }
+func (m *Int64Value) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Int64Value.Unmarshal(m, b)
+}
+func (m *Int64Value) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Int64Value.Marshal(b, m, deterministic)
+}
+func (dst *Int64Value) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Int64Value.Merge(dst, src)
+}
+func (m *Int64Value) XXX_Size() int {
+	return xxx_messageInfo_Int64Value.Size(m)
+}
+func (m *Int64Value) XXX_DiscardUnknown() {
+	xxx_messageInfo_Int64Value.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Int64Value proto.InternalMessageInfo
 
 func (m *Int64Value) GetValue() int64 {
 	if m != nil {
@@ -103,14 +152,36 @@
 // The JSON representation for `UInt64Value` is JSON string.
 type UInt64Value struct {
 	// The uint64 value.
-	Value uint64 `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	Value                uint64   `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *UInt64Value) Reset()                    { *m = UInt64Value{} }
-func (m *UInt64Value) String() string            { return proto.CompactTextString(m) }
-func (*UInt64Value) ProtoMessage()               {}
-func (*UInt64Value) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
-func (*UInt64Value) XXX_WellKnownType() string   { return "UInt64Value" }
+func (m *UInt64Value) Reset()         { *m = UInt64Value{} }
+func (m *UInt64Value) String() string { return proto.CompactTextString(m) }
+func (*UInt64Value) ProtoMessage()    {}
+func (*UInt64Value) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{3}
+}
+func (*UInt64Value) XXX_WellKnownType() string { return "UInt64Value" }
+func (m *UInt64Value) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_UInt64Value.Unmarshal(m, b)
+}
+func (m *UInt64Value) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_UInt64Value.Marshal(b, m, deterministic)
+}
+func (dst *UInt64Value) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_UInt64Value.Merge(dst, src)
+}
+func (m *UInt64Value) XXX_Size() int {
+	return xxx_messageInfo_UInt64Value.Size(m)
+}
+func (m *UInt64Value) XXX_DiscardUnknown() {
+	xxx_messageInfo_UInt64Value.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_UInt64Value proto.InternalMessageInfo
 
 func (m *UInt64Value) GetValue() uint64 {
 	if m != nil {
@@ -124,14 +195,36 @@
 // The JSON representation for `Int32Value` is JSON number.
 type Int32Value struct {
 	// The int32 value.
-	Value int32 `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	Value                int32    `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *Int32Value) Reset()                    { *m = Int32Value{} }
-func (m *Int32Value) String() string            { return proto.CompactTextString(m) }
-func (*Int32Value) ProtoMessage()               {}
-func (*Int32Value) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
-func (*Int32Value) XXX_WellKnownType() string   { return "Int32Value" }
+func (m *Int32Value) Reset()         { *m = Int32Value{} }
+func (m *Int32Value) String() string { return proto.CompactTextString(m) }
+func (*Int32Value) ProtoMessage()    {}
+func (*Int32Value) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{4}
+}
+func (*Int32Value) XXX_WellKnownType() string { return "Int32Value" }
+func (m *Int32Value) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Int32Value.Unmarshal(m, b)
+}
+func (m *Int32Value) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Int32Value.Marshal(b, m, deterministic)
+}
+func (dst *Int32Value) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Int32Value.Merge(dst, src)
+}
+func (m *Int32Value) XXX_Size() int {
+	return xxx_messageInfo_Int32Value.Size(m)
+}
+func (m *Int32Value) XXX_DiscardUnknown() {
+	xxx_messageInfo_Int32Value.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Int32Value proto.InternalMessageInfo
 
 func (m *Int32Value) GetValue() int32 {
 	if m != nil {
@@ -145,14 +238,36 @@
 // The JSON representation for `UInt32Value` is JSON number.
 type UInt32Value struct {
 	// The uint32 value.
-	Value uint32 `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	Value                uint32   `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *UInt32Value) Reset()                    { *m = UInt32Value{} }
-func (m *UInt32Value) String() string            { return proto.CompactTextString(m) }
-func (*UInt32Value) ProtoMessage()               {}
-func (*UInt32Value) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
-func (*UInt32Value) XXX_WellKnownType() string   { return "UInt32Value" }
+func (m *UInt32Value) Reset()         { *m = UInt32Value{} }
+func (m *UInt32Value) String() string { return proto.CompactTextString(m) }
+func (*UInt32Value) ProtoMessage()    {}
+func (*UInt32Value) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{5}
+}
+func (*UInt32Value) XXX_WellKnownType() string { return "UInt32Value" }
+func (m *UInt32Value) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_UInt32Value.Unmarshal(m, b)
+}
+func (m *UInt32Value) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_UInt32Value.Marshal(b, m, deterministic)
+}
+func (dst *UInt32Value) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_UInt32Value.Merge(dst, src)
+}
+func (m *UInt32Value) XXX_Size() int {
+	return xxx_messageInfo_UInt32Value.Size(m)
+}
+func (m *UInt32Value) XXX_DiscardUnknown() {
+	xxx_messageInfo_UInt32Value.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_UInt32Value proto.InternalMessageInfo
 
 func (m *UInt32Value) GetValue() uint32 {
 	if m != nil {
@@ -166,14 +281,36 @@
 // The JSON representation for `BoolValue` is JSON `true` and `false`.
 type BoolValue struct {
 	// The bool value.
-	Value bool `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	Value                bool     `protobuf:"varint,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *BoolValue) Reset()                    { *m = BoolValue{} }
-func (m *BoolValue) String() string            { return proto.CompactTextString(m) }
-func (*BoolValue) ProtoMessage()               {}
-func (*BoolValue) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
-func (*BoolValue) XXX_WellKnownType() string   { return "BoolValue" }
+func (m *BoolValue) Reset()         { *m = BoolValue{} }
+func (m *BoolValue) String() string { return proto.CompactTextString(m) }
+func (*BoolValue) ProtoMessage()    {}
+func (*BoolValue) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{6}
+}
+func (*BoolValue) XXX_WellKnownType() string { return "BoolValue" }
+func (m *BoolValue) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BoolValue.Unmarshal(m, b)
+}
+func (m *BoolValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BoolValue.Marshal(b, m, deterministic)
+}
+func (dst *BoolValue) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BoolValue.Merge(dst, src)
+}
+func (m *BoolValue) XXX_Size() int {
+	return xxx_messageInfo_BoolValue.Size(m)
+}
+func (m *BoolValue) XXX_DiscardUnknown() {
+	xxx_messageInfo_BoolValue.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BoolValue proto.InternalMessageInfo
 
 func (m *BoolValue) GetValue() bool {
 	if m != nil {
@@ -187,14 +324,36 @@
 // The JSON representation for `StringValue` is JSON string.
 type StringValue struct {
 	// The string value.
-	Value string `protobuf:"bytes,1,opt,name=value" json:"value,omitempty"`
+	Value                string   `protobuf:"bytes,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *StringValue) Reset()                    { *m = StringValue{} }
-func (m *StringValue) String() string            { return proto.CompactTextString(m) }
-func (*StringValue) ProtoMessage()               {}
-func (*StringValue) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
-func (*StringValue) XXX_WellKnownType() string   { return "StringValue" }
+func (m *StringValue) Reset()         { *m = StringValue{} }
+func (m *StringValue) String() string { return proto.CompactTextString(m) }
+func (*StringValue) ProtoMessage()    {}
+func (*StringValue) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{7}
+}
+func (*StringValue) XXX_WellKnownType() string { return "StringValue" }
+func (m *StringValue) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StringValue.Unmarshal(m, b)
+}
+func (m *StringValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StringValue.Marshal(b, m, deterministic)
+}
+func (dst *StringValue) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StringValue.Merge(dst, src)
+}
+func (m *StringValue) XXX_Size() int {
+	return xxx_messageInfo_StringValue.Size(m)
+}
+func (m *StringValue) XXX_DiscardUnknown() {
+	xxx_messageInfo_StringValue.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StringValue proto.InternalMessageInfo
 
 func (m *StringValue) GetValue() string {
 	if m != nil {
@@ -208,14 +367,36 @@
 // The JSON representation for `BytesValue` is JSON string.
 type BytesValue struct {
 	// The bytes value.
-	Value []byte `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
+	Value                []byte   `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
-func (m *BytesValue) Reset()                    { *m = BytesValue{} }
-func (m *BytesValue) String() string            { return proto.CompactTextString(m) }
-func (*BytesValue) ProtoMessage()               {}
-func (*BytesValue) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
-func (*BytesValue) XXX_WellKnownType() string   { return "BytesValue" }
+func (m *BytesValue) Reset()         { *m = BytesValue{} }
+func (m *BytesValue) String() string { return proto.CompactTextString(m) }
+func (*BytesValue) ProtoMessage()    {}
+func (*BytesValue) Descriptor() ([]byte, []int) {
+	return fileDescriptor_wrappers_16c7c35c009f3253, []int{8}
+}
+func (*BytesValue) XXX_WellKnownType() string { return "BytesValue" }
+func (m *BytesValue) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BytesValue.Unmarshal(m, b)
+}
+func (m *BytesValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BytesValue.Marshal(b, m, deterministic)
+}
+func (dst *BytesValue) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BytesValue.Merge(dst, src)
+}
+func (m *BytesValue) XXX_Size() int {
+	return xxx_messageInfo_BytesValue.Size(m)
+}
+func (m *BytesValue) XXX_DiscardUnknown() {
+	xxx_messageInfo_BytesValue.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BytesValue proto.InternalMessageInfo
 
 func (m *BytesValue) GetValue() []byte {
 	if m != nil {
@@ -236,9 +417,11 @@
 	proto.RegisterType((*BytesValue)(nil), "google.protobuf.BytesValue")
 }
 
-func init() { proto.RegisterFile("google/protobuf/wrappers.proto", fileDescriptor0) }
+func init() {
+	proto.RegisterFile("google/protobuf/wrappers.proto", fileDescriptor_wrappers_16c7c35c009f3253)
+}
 
-var fileDescriptor0 = []byte{
+var fileDescriptor_wrappers_16c7c35c009f3253 = []byte{
 	// 259 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4b, 0xcf, 0xcf, 0x4f,
 	0xcf, 0x49, 0xd5, 0x2f, 0x28, 0xca, 0x2f, 0xc9, 0x4f, 0x2a, 0x4d, 0xd3, 0x2f, 0x2f, 0x4a, 0x2c,
diff --git a/regenerate.sh b/regenerate.sh
new file mode 100755
index 0000000..dc7e2d1
--- /dev/null
+++ b/regenerate.sh
@@ -0,0 +1,53 @@
+#!/bin/bash
+
+set -e
+
+# Install the working tree's protoc-gen-gen in a tempdir.
+tmpdir=$(mktemp -d -t regen-wkt.XXXXXX)
+trap 'rm -rf $tmpdir' EXIT
+mkdir -p $tmpdir/bin
+PATH=$tmpdir/bin:$PATH
+GOBIN=$tmpdir/bin go install ./protoc-gen-go
+
+# Public imports require at least Go 1.9.
+supportTypeAliases=""
+if go list -f '{{context.ReleaseTags}}' runtime | grep -q go1.9; then
+  supportTypeAliases=1
+fi
+
+# Generate various test protos.
+PROTO_DIRS=(
+  conformance/internal/conformance_proto
+  jsonpb/jsonpb_test_proto
+  proto
+  protoc-gen-go/testdata
+)
+for dir in ${PROTO_DIRS[@]}; do
+  for p in `find $dir -name "*.proto"`; do
+    if [[ $p == */import_public/* && ! $supportTypeAliases ]]; then
+      echo "# $p (skipped)"
+      continue;
+    fi
+    echo "# $p"
+    protoc -I$dir --go_out=plugins=grpc,paths=source_relative:$dir $p
+  done
+done
+
+# Deriving the location of the source protos from the path to the
+# protoc binary may be a bit odd, but this is what protoc itself does.
+PROTO_INCLUDE=$(dirname $(dirname $(which protoc)))/include
+
+# Well-known types.
+WKT_PROTOS=(any duration empty struct timestamp wrappers)
+for p in ${WKT_PROTOS[@]}; do
+  echo "# google/protobuf/$p.proto"
+  protoc --go_out=paths=source_relative:$tmpdir google/protobuf/$p.proto
+  cp $tmpdir/google/protobuf/$p.pb.go ptypes/$p
+  cp $PROTO_INCLUDE/google/protobuf/$p.proto ptypes/$p
+done
+
+# descriptor.proto.
+echo "# google/protobuf/descriptor.proto"
+protoc --go_out=paths=source_relative:$tmpdir google/protobuf/descriptor.proto
+cp $tmpdir/google/protobuf/descriptor.pb.go protoc-gen-go/descriptor
+cp $PROTO_INCLUDE/google/protobuf/descriptor.proto protoc-gen-go/descriptor