// WARNING: This file is machine generated by fidlgen.

#pragma once

#include <lib/fidl/internal.h>
#include <lib/fidl/llcpp/array.h>
#include <lib/fidl/llcpp/buffer_allocator.h>
#include <lib/fidl/llcpp/buffer_then_heap_allocator.h>
#include <lib/fidl/llcpp/coding.h>
#include <lib/fidl/llcpp/envelope.h>
#include <lib/fidl/llcpp/errors.h>
#include <lib/fidl/llcpp/memory.h>
#include <lib/fidl/llcpp/message.h>
#include <lib/fidl/llcpp/message_storage.h>
#include <lib/fidl/llcpp/string_view.h>
#include <lib/fidl/llcpp/tracking_ptr.h>
#include <lib/fidl/llcpp/traits.h>
#include <lib/fidl/llcpp/vector_view.h>
#include <lib/fit/function.h>
#include <lib/fit/optional.h>

#include <variant>
#ifdef __Fuchsia__
#include <lib/fidl/llcpp/client.h>
#include <lib/fidl/llcpp/connect_service.h>
#include <lib/fidl/llcpp/result.h>
#include <lib/fidl/llcpp/server.h>
#include <lib/fidl/llcpp/service_handler_interface.h>
#include <lib/fidl/llcpp/sync_call.h>
#include <lib/fidl/llcpp/transaction.h>
#include <lib/fidl/txn_header.h>
#include <lib/zx/channel.h>
#endif  // __Fuchsia__
#include <zircon/fidl.h>

namespace llcpp {

namespace fidl {
namespace test {
namespace error {

struct Example_foo_Response;
class Example_foo_Result;
class Example;

extern "C" const fidl_type_t fidl_test_error_Example_foo_ResultTable;

class Example_foo_Result {
 public:
  Example_foo_Result() : ordinal_(Ordinal::Invalid), envelope_{} {}

  Example_foo_Result(Example_foo_Result&&) = default;
  Example_foo_Result& operator=(Example_foo_Result&&) = default;

  ~Example_foo_Result() { reset_ptr(nullptr); }

  enum class Tag : fidl_xunion_tag_t {
    kResponse = 1,  // 0x1
    kErr = 2,       // 0x2
  };

  bool has_invalid_tag() const { return ordinal_ == Ordinal::Invalid; }

  bool is_response() const { return ordinal_ == Ordinal::kResponse; }

  static Example_foo_Result WithResponse(
      ::fidl::tracking_ptr<::llcpp::fidl::test::error::Example_foo_Response>&&
          val) {
    Example_foo_Result result;
    result.set_response(std::move(val));
    return result;
  }

  void set_response(
      ::fidl::tracking_ptr<::llcpp::fidl::test::error::Example_foo_Response>&&
          elem) {
    ordinal_ = Ordinal::kResponse;
    reset_ptr(static_cast<::fidl::tracking_ptr<void>>(std::move(elem)));
  }

  ::llcpp::fidl::test::error::Example_foo_Response& mutable_response() {
    ZX_ASSERT(ordinal_ == Ordinal::kResponse);
    return *static_cast<::llcpp::fidl::test::error::Example_foo_Response*>(
        envelope_.data.get());
  }
  const ::llcpp::fidl::test::error::Example_foo_Response& response() const {
    ZX_ASSERT(ordinal_ == Ordinal::kResponse);
    return *static_cast<::llcpp::fidl::test::error::Example_foo_Response*>(
        envelope_.data.get());
  }

  bool is_err() const { return ordinal_ == Ordinal::kErr; }

  static Example_foo_Result WithErr(::fidl::tracking_ptr<uint32_t>&& val) {
    Example_foo_Result result;
    result.set_err(std::move(val));
    return result;
  }

  void set_err(::fidl::tracking_ptr<uint32_t>&& elem) {
    ordinal_ = Ordinal::kErr;
    reset_ptr(static_cast<::fidl::tracking_ptr<void>>(std::move(elem)));
  }

  uint32_t& mutable_err() {
    ZX_ASSERT(ordinal_ == Ordinal::kErr);
    return *static_cast<uint32_t*>(envelope_.data.get());
  }
  const uint32_t& err() const {
    ZX_ASSERT(ordinal_ == Ordinal::kErr);
    return *static_cast<uint32_t*>(envelope_.data.get());
  }
  Tag which() const {
    ZX_ASSERT(!has_invalid_tag());
    return static_cast<Tag>(ordinal_);
  }

  static constexpr const fidl_type_t* Type =
      &fidl_test_error_Example_foo_ResultTable;
  static constexpr uint32_t MaxNumHandles = 0;
  static constexpr uint32_t PrimarySize = 24;
  [[maybe_unused]] static constexpr uint32_t MaxOutOfLine = 8;
  static constexpr bool HasPointer = true;

 private:
  enum class Ordinal : fidl_xunion_tag_t {
    Invalid = 0,
    kResponse = 1,  // 0x1
    kErr = 2,       // 0x2
  };

  void reset_ptr(::fidl::tracking_ptr<void>&& new_ptr) {
    // To clear the existing value, std::move it and let it go out of scope.
    switch (static_cast<fidl_xunion_tag_t>(ordinal_)) {
      case 1: {
        ::fidl::tracking_ptr<::llcpp::fidl::test::error::Example_foo_Response>
            to_destroy = static_cast<::fidl::tracking_ptr<
                ::llcpp::fidl::test::error::Example_foo_Response>>(
                std::move(envelope_.data));
        break;
      }
      case 2: {
        ::fidl::tracking_ptr<uint32_t> to_destroy =
            static_cast<::fidl::tracking_ptr<uint32_t>>(
                std::move(envelope_.data));
        break;
      }
    }

    envelope_.data = std::move(new_ptr);
  }

  static void SizeAndOffsetAssertionHelper();
  Ordinal ordinal_;
  FIDL_ALIGNDECL
  ::fidl::Envelope<void> envelope_;
};

extern "C" const fidl_type_t fidl_test_error_Example_foo_ResponseTable;

struct Example_foo_Response {
  static constexpr const fidl_type_t* Type =
      &fidl_test_error_Example_foo_ResponseTable;
  static constexpr uint32_t MaxNumHandles = 0;
  static constexpr uint32_t PrimarySize = 8;
  [[maybe_unused]] static constexpr uint32_t MaxOutOfLine = 0;
  static constexpr bool HasPointer = false;

  int64_t y = {};

  class UnownedEncodedMessage final {
   public:
    UnownedEncodedMessage(uint8_t* bytes, uint32_t byte_size,
                          Example_foo_Response* value)
        : message_(bytes, byte_size, sizeof(Example_foo_Response), nullptr, 0,
                   0) {
      message_.LinearizeAndEncode<Example_foo_Response>(value);
    }
    UnownedEncodedMessage(const UnownedEncodedMessage&) = delete;
    UnownedEncodedMessage(UnownedEncodedMessage&&) = delete;
    UnownedEncodedMessage* operator=(const UnownedEncodedMessage&) = delete;
    UnownedEncodedMessage* operator=(UnownedEncodedMessage&&) = delete;

    zx_status_t status() const { return message_.status(); }
#ifdef __Fuchsia__
    const char* status_string() const { return message_.status_string(); }
#endif
    bool ok() const { return message_.status() == ZX_OK; }
    const char* error() const { return message_.error(); }

    ::fidl::OutgoingMessage& GetOutgoingMessage() { return message_; }

   private:
    ::fidl::OutgoingMessage message_;
  };

  class OwnedEncodedMessage final {
   public:
    explicit OwnedEncodedMessage(Example_foo_Response* value)
        : message_(bytes_, sizeof(bytes_), value) {}
    OwnedEncodedMessage(const OwnedEncodedMessage&) = delete;
    OwnedEncodedMessage(OwnedEncodedMessage&&) = delete;
    OwnedEncodedMessage* operator=(const OwnedEncodedMessage&) = delete;
    OwnedEncodedMessage* operator=(OwnedEncodedMessage&&) = delete;

    zx_status_t status() const { return message_.status(); }
#ifdef __Fuchsia__
    const char* status_string() const { return message_.status_string(); }
#endif
    bool ok() const { return message_.ok(); }
    const char* error() const { return message_.error(); }

    ::fidl::OutgoingMessage& GetOutgoingMessage() {
      return message_.GetOutgoingMessage();
    }

   private:
    FIDL_ALIGNDECL
    uint8_t bytes_[FIDL_ALIGN(PrimarySize + MaxOutOfLine)];
    UnownedEncodedMessage message_;
  };

  class DecodedMessage final : public ::fidl::internal::IncomingMessage {
   public:
    DecodedMessage(uint8_t* bytes, uint32_t byte_actual,
                   zx_handle_info_t* handles = nullptr,
                   uint32_t handle_actual = 0)
        : ::fidl::internal::IncomingMessage(bytes, byte_actual, handles,
                                            handle_actual) {
      Decode<struct Example_foo_Response>();
    }
    DecodedMessage(fidl_incoming_msg_t* msg)
        : ::fidl::internal::IncomingMessage(msg) {
      Decode<struct Example_foo_Response>();
    }
    DecodedMessage(const DecodedMessage&) = delete;
    DecodedMessage(DecodedMessage&&) = delete;
    DecodedMessage* operator=(const DecodedMessage&) = delete;
    DecodedMessage* operator=(DecodedMessage&&) = delete;

    struct Example_foo_Response* PrimaryObject() {
      ZX_DEBUG_ASSERT(ok());
      return reinterpret_cast<struct Example_foo_Response*>(bytes());
    }

    // Release the ownership of the decoded message. That means that the handles
    // won't be closed When the object is destroyed. After calling this method,
    // the DecodedMessage object should not be used anymore.
    void ReleasePrimaryObject() { ResetBytes(); }

    // These methods should only be used for testing purpose.
    // They create an DecodedMessage using the bytes of an outgoing message and
    // copying the handles.
    static DecodedMessage FromOutgoingWithRawHandleCopy(
        UnownedEncodedMessage* encoded_message) {
      return DecodedMessage(encoded_message->GetOutgoingMessage());
    }
    static DecodedMessage FromOutgoingWithRawHandleCopy(
        OwnedEncodedMessage* encoded_message) {
      return DecodedMessage(encoded_message->GetOutgoingMessage());
    }

   private:
    DecodedMessage(::fidl::OutgoingMessage& outgoing_message) {
      Init(outgoing_message, nullptr, 0);
      if (ok()) {
        Decode<struct Example_foo_Response>();
      }
    }
  };
};

extern "C" const fidl_type_t fidl_test_error_ExamplefooRequestTable;
extern "C" const fidl_type_t fidl_test_error_ExamplefooResponseTable;

class Example final {
  Example() = delete;

 public:
  struct fooResponse final {
    FIDL_ALIGNDECL
    fidl_message_header_t _hdr;
    ::llcpp::fidl::test::error::Example_foo_Result result;
    explicit fooResponse(::llcpp::fidl::test::error::Example_foo_Result& result)
        : result(std::move(result)) {
      _InitHeader();
    }
    fooResponse() { _InitHeader(); }

    static constexpr const fidl_type_t* Type =
        &fidl_test_error_ExamplefooResponseTable;
    static constexpr uint32_t MaxNumHandles = 0;
    static constexpr uint32_t PrimarySize = 40;
    static constexpr uint32_t MaxOutOfLine = 8;
    static constexpr bool HasFlexibleEnvelope = false;
    static constexpr bool HasPointer = true;
    static constexpr ::fidl::internal::TransactionalMessageKind MessageKind =
        ::fidl::internal::TransactionalMessageKind::kResponse;

    class UnownedEncodedMessage final {
     public:
      UnownedEncodedMessage(
          uint8_t* _bytes, uint32_t _byte_size,
          ::llcpp::fidl::test::error::Example_foo_Result& result)
          : message_(_bytes, _byte_size, sizeof(fooResponse), nullptr, 0, 0) {
        FIDL_ALIGNDECL fooResponse _response{result};
        message_.LinearizeAndEncode<fooResponse>(&_response);
      }
      UnownedEncodedMessage(uint8_t* bytes, uint32_t byte_size,
                            fooResponse* response)
          : message_(bytes, byte_size, sizeof(fooResponse), nullptr, 0, 0) {
        message_.LinearizeAndEncode<fooResponse>(response);
      }
      UnownedEncodedMessage(const UnownedEncodedMessage&) = delete;
      UnownedEncodedMessage(UnownedEncodedMessage&&) = delete;
      UnownedEncodedMessage* operator=(const UnownedEncodedMessage&) = delete;
      UnownedEncodedMessage* operator=(UnownedEncodedMessage&&) = delete;

      zx_status_t status() const { return message_.status(); }
#ifdef __Fuchsia__
      const char* status_string() const { return message_.status_string(); }
#endif
      bool ok() const { return message_.status() == ZX_OK; }
      const char* error() const { return message_.error(); }

      ::fidl::OutgoingMessage& GetOutgoingMessage() { return message_; }

      void Write(zx_handle_t client) { message_.Write(client); }

     private:
      fooResponse& Message() {
        return *reinterpret_cast<fooResponse*>(message_.bytes());
      }
      ::fidl::OutgoingMessage message_;
    };

    class OwnedEncodedMessage final {
     public:
      explicit OwnedEncodedMessage(
          ::llcpp::fidl::test::error::Example_foo_Result& result)
          : message_(bytes_, sizeof(bytes_), result) {}
      explicit OwnedEncodedMessage(fooResponse* response)
          : message_(bytes_, sizeof(bytes_), response) {}
      OwnedEncodedMessage(const OwnedEncodedMessage&) = delete;
      OwnedEncodedMessage(OwnedEncodedMessage&&) = delete;
      OwnedEncodedMessage* operator=(const OwnedEncodedMessage&) = delete;
      OwnedEncodedMessage* operator=(OwnedEncodedMessage&&) = delete;

      zx_status_t status() const { return message_.status(); }
#ifdef __Fuchsia__
      const char* status_string() const { return message_.status_string(); }
#endif
      bool ok() const { return message_.ok(); }
      const char* error() const { return message_.error(); }

      ::fidl::OutgoingMessage& GetOutgoingMessage() {
        return message_.GetOutgoingMessage();
      }

      void Write(zx_handle_t client) { message_.Write(client); }

     private:
      FIDL_ALIGNDECL
      uint8_t bytes_[PrimarySize + MaxOutOfLine];
      UnownedEncodedMessage message_;
    };

    class DecodedMessage final : public ::fidl::internal::IncomingMessage {
     public:
      DecodedMessage(uint8_t* bytes, uint32_t byte_actual,
                     zx_handle_info_t* handles = nullptr,
                     uint32_t handle_actual = 0)
          : ::fidl::internal::IncomingMessage(bytes, byte_actual, handles,
                                              handle_actual) {
        Decode<fooResponse>();
      }
      DecodedMessage(fidl_incoming_msg_t* msg)
          : ::fidl::internal::IncomingMessage(msg) {
        Decode<fooResponse>();
      }
      DecodedMessage(const DecodedMessage&) = delete;
      DecodedMessage(DecodedMessage&&) = delete;
      DecodedMessage* operator=(const DecodedMessage&) = delete;
      DecodedMessage* operator=(DecodedMessage&&) = delete;

      fooResponse* PrimaryObject() {
        ZX_DEBUG_ASSERT(ok());
        return reinterpret_cast<fooResponse*>(bytes());
      }

      // Release the ownership of the decoded message. That means that the
      // handles won't be closed When the object is destroyed. After calling
      // this method, the DecodedMessage object should not be used anymore.
      void ReleasePrimaryObject() { ResetBytes(); }

      // These methods should only be used for testing purpose.
      // They create an DecodedMessage using the bytes of an outgoing message
      // and copying the handles.
      static DecodedMessage FromOutgoingWithRawHandleCopy(
          UnownedEncodedMessage* outgoing_message) {
        return DecodedMessage(outgoing_message->GetOutgoingMessage());
      }
      static DecodedMessage FromOutgoingWithRawHandleCopy(
          OwnedEncodedMessage* outgoing_message) {
        return DecodedMessage(outgoing_message->GetOutgoingMessage());
      }

     private:
      DecodedMessage(::fidl::OutgoingMessage& outgoing_message) {
        Init(outgoing_message, nullptr, 0);
        if (ok()) {
          Decode<fooResponse>();
        }
      }
    };

   private:
    void _InitHeader();
  };
  struct fooRequest final {
    FIDL_ALIGNDECL
    fidl_message_header_t _hdr;
    ::fidl::StringView s;
    explicit fooRequest(zx_txid_t _txid, const ::fidl::StringView& s)
        : s(::fidl::unowned_ptr_t<const char>(s.data()), s.size()) {
      _InitHeader(_txid);
    }
    explicit fooRequest(zx_txid_t _txid) { _InitHeader(_txid); }

    static constexpr const fidl_type_t* Type =
        &fidl_test_error_ExamplefooRequestTable;
    static constexpr uint32_t MaxNumHandles = 0;
    static constexpr uint32_t PrimarySize = 32;
    static constexpr uint32_t MaxOutOfLine = 4294967295;
    static constexpr uint32_t AltPrimarySize = 32;
    static constexpr uint32_t AltMaxOutOfLine = 4294967295;
    static constexpr bool HasFlexibleEnvelope = false;
    static constexpr bool HasPointer = true;
    static constexpr ::fidl::internal::TransactionalMessageKind MessageKind =
        ::fidl::internal::TransactionalMessageKind::kRequest;
    using ResponseType = fooResponse;

    class UnownedEncodedMessage final {
     public:
      UnownedEncodedMessage(uint8_t* _bytes, uint32_t _byte_size,
                            zx_txid_t _txid, const ::fidl::StringView& s)
          : message_(_bytes, _byte_size, sizeof(fooRequest), nullptr, 0, 0) {
        FIDL_ALIGNDECL fooRequest _request(_txid, s);
        message_.LinearizeAndEncode<fooRequest>(&_request);
      }
      UnownedEncodedMessage(uint8_t* bytes, uint32_t byte_size,
                            fooRequest* request)
          : message_(bytes, byte_size, sizeof(fooRequest), nullptr, 0, 0) {
        message_.LinearizeAndEncode<fooRequest>(request);
      }
      UnownedEncodedMessage(const UnownedEncodedMessage&) = delete;
      UnownedEncodedMessage(UnownedEncodedMessage&&) = delete;
      UnownedEncodedMessage* operator=(const UnownedEncodedMessage&) = delete;
      UnownedEncodedMessage* operator=(UnownedEncodedMessage&&) = delete;

      zx_status_t status() const { return message_.status(); }
#ifdef __Fuchsia__
      const char* status_string() const { return message_.status_string(); }
#endif
      bool ok() const { return message_.status() == ZX_OK; }
      const char* error() const { return message_.error(); }

      ::fidl::OutgoingMessage& GetOutgoingMessage() { return message_; }

      void Write(zx_handle_t client) { message_.Write(client); }

     private:
      fooRequest& Message() {
        return *reinterpret_cast<fooRequest*>(message_.bytes());
      }
      ::fidl::OutgoingMessage message_;
    };

    class OwnedEncodedMessage final {
     public:
      explicit OwnedEncodedMessage(zx_txid_t _txid, const ::fidl::StringView& s)
          : bytes_(std::make_unique<::fidl::internal::AlignedBuffer<
                       ZX_CHANNEL_MAX_MSG_BYTES>>()),
            message_(bytes_->data(), ZX_CHANNEL_MAX_MSG_BYTES, _txid, s) {}
      explicit OwnedEncodedMessage(fooRequest* request)
          : bytes_(std::make_unique<::fidl::internal::AlignedBuffer<
                       ZX_CHANNEL_MAX_MSG_BYTES>>()),
            message_(bytes_->data(), ZX_CHANNEL_MAX_MSG_BYTES, request) {}
      OwnedEncodedMessage(const OwnedEncodedMessage&) = delete;
      OwnedEncodedMessage(OwnedEncodedMessage&&) = delete;
      OwnedEncodedMessage* operator=(const OwnedEncodedMessage&) = delete;
      OwnedEncodedMessage* operator=(OwnedEncodedMessage&&) = delete;

      zx_status_t status() const { return message_.status(); }
#ifdef __Fuchsia__
      const char* status_string() const { return message_.status_string(); }
#endif
      bool ok() const { return message_.ok(); }
      const char* error() const { return message_.error(); }

      ::fidl::OutgoingMessage& GetOutgoingMessage() {
        return message_.GetOutgoingMessage();
      }

      void Write(zx_handle_t client) { message_.Write(client); }

     private:
      std::unique_ptr<::fidl::internal::AlignedBuffer<ZX_CHANNEL_MAX_MSG_BYTES>>
          bytes_;
      UnownedEncodedMessage message_;
    };

    class DecodedMessage final : public ::fidl::internal::IncomingMessage {
     public:
      DecodedMessage(uint8_t* bytes, uint32_t byte_actual,
                     zx_handle_info_t* handles = nullptr,
                     uint32_t handle_actual = 0)
          : ::fidl::internal::IncomingMessage(bytes, byte_actual, handles,
                                              handle_actual) {
        Decode<fooRequest>();
      }
      DecodedMessage(fidl_incoming_msg_t* msg)
          : ::fidl::internal::IncomingMessage(msg) {
        Decode<fooRequest>();
      }
      DecodedMessage(const DecodedMessage&) = delete;
      DecodedMessage(DecodedMessage&&) = delete;
      DecodedMessage* operator=(const DecodedMessage&) = delete;
      DecodedMessage* operator=(DecodedMessage&&) = delete;

      fooRequest* PrimaryObject() {
        ZX_DEBUG_ASSERT(ok());
        return reinterpret_cast<fooRequest*>(bytes());
      }

      // Release the ownership of the decoded message. That means that the
      // handles won't be closed When the object is destroyed. After calling
      // this method, the DecodedMessage object should not be used anymore.
      void ReleasePrimaryObject() { ResetBytes(); }

      // These methods should only be used for testing purpose.
      // They create an DecodedMessage using the bytes of an outgoing message
      // and copying the handles.
      static DecodedMessage FromOutgoingWithRawHandleCopy(
          UnownedEncodedMessage* encoded_message) {
        return DecodedMessage(encoded_message->GetOutgoingMessage());
      }
      static DecodedMessage FromOutgoingWithRawHandleCopy(
          OwnedEncodedMessage* encoded_message) {
        return DecodedMessage(encoded_message->GetOutgoingMessage());
      }

     private:
      DecodedMessage(::fidl::OutgoingMessage& outgoing_message) {
        Init(outgoing_message, nullptr, 0);
        if (ok()) {
          Decode<fooRequest>();
        }
      }
    };

   private:
    void _InitHeader(zx_txid_t _txid);
  };

  // Collection of return types of FIDL calls in this protocol.
  class ResultOf final {
    ResultOf() = delete;

   public:
    class foo final : public ::fidl::Result {
     public:
      explicit foo(zx_handle_t _client, const ::fidl::StringView& s);
      foo(zx_handle_t _client, const ::fidl::StringView& s,
          zx_time_t _deadline);
      explicit foo(const ::fidl::Result& result) : ::fidl::Result(result) {}
      foo(foo&&) = delete;
      foo(const foo&) = delete;
      foo* operator=(foo&&) = delete;
      foo* operator=(const foo&) = delete;
      ~foo() = default;

      fooResponse* Unwrap() {
        ZX_DEBUG_ASSERT(ok());
        return reinterpret_cast<fooResponse*>(bytes_);
      }
      const fooResponse* Unwrap() const {
        ZX_DEBUG_ASSERT(ok());
        return reinterpret_cast<const fooResponse*>(bytes_);
      }

      fooResponse& value() { return *Unwrap(); }
      const fooResponse& value() const { return *Unwrap(); }

      fooResponse* operator->() { return &value(); }
      const fooResponse* operator->() const { return &value(); }

      fooResponse& operator*() { return value(); }
      const fooResponse& operator*() const { return value(); }

     private:
      FIDL_ALIGNDECL
      uint8_t bytes_[fooResponse::PrimarySize + fooResponse::MaxOutOfLine];
    };
  };

  // Collection of return types of FIDL calls in this protocol,
  // when the caller-allocate flavor or in-place call is used.
  class UnownedResultOf final {
    UnownedResultOf() = delete;

   public:
    class foo final : public ::fidl::Result {
     public:
      explicit foo(zx_handle_t _client, uint8_t* _request_bytes,
                   uint32_t _request_byte_capacity, const ::fidl::StringView& s,
                   uint8_t* _response_bytes, uint32_t _response_byte_capacity);
      explicit foo(const ::fidl::Result& result) : ::fidl::Result(result) {}
      foo(foo&&) = delete;
      foo(const foo&) = delete;
      foo* operator=(foo&&) = delete;
      foo* operator=(const foo&) = delete;
      ~foo() = default;

      fooResponse* Unwrap() {
        ZX_DEBUG_ASSERT(ok());
        return reinterpret_cast<fooResponse*>(bytes_);
      }
      const fooResponse* Unwrap() const {
        ZX_DEBUG_ASSERT(ok());
        return reinterpret_cast<const fooResponse*>(bytes_);
      }

      fooResponse& value() { return *Unwrap(); }
      const fooResponse& value() const { return *Unwrap(); }

      fooResponse* operator->() { return &value(); }
      const fooResponse* operator->() const { return &value(); }

      fooResponse& operator*() { return value(); }
      const fooResponse& operator*() const { return value(); }

     private:
      uint8_t* bytes_;
    };
  };

  // Methods to make a sync FIDL call directly on an unowned channel, avoiding
  // setting up a client.
  class Call final {
    Call() = delete;

   public:
    // Allocates 48 bytes of response buffer on the stack. Request is
    // heap-allocated.
    static ResultOf::foo foo(::zx::unowned_channel _client_end,
                             ::fidl::StringView s) {
      return ResultOf::foo(_client_end->get(), s);
    }

    // Caller provides the backing storage for FIDL message via request and
    // response buffers.
    static UnownedResultOf::foo foo(::zx::unowned_channel _client_end,
                                    ::fidl::BufferSpan _request_buffer,
                                    ::fidl::StringView s,
                                    ::fidl::BufferSpan _response_buffer) {
      return UnownedResultOf::foo(
          _client_end->get(), _request_buffer.data, _request_buffer.capacity, s,
          _response_buffer.data, _response_buffer.capacity);
    }
  };

  class SyncClient final {
   public:
    SyncClient() = default;
    explicit SyncClient(::zx::channel channel) : channel_(std::move(channel)) {}
    ~SyncClient() = default;
    SyncClient(SyncClient&&) = default;
    SyncClient& operator=(SyncClient&&) = default;

    const ::zx::channel& channel() const { return channel_; }

    ::zx::channel* mutable_channel() { return &channel_; }

    // Allocates 48 bytes of response buffer on the stack. Request is
    // heap-allocated.
    ResultOf::foo foo(::fidl::StringView s) {
      return ResultOf::foo(this->channel().get(), s);
    }

    // Caller provides the backing storage for FIDL message via request and
    // response buffers.
    UnownedResultOf::foo foo(::fidl::BufferSpan _request_buffer,
                             ::fidl::StringView s,
                             ::fidl::BufferSpan _response_buffer) {
      return UnownedResultOf::foo(
          this->channel().get(), _request_buffer.data, _request_buffer.capacity,
          s, _response_buffer.data, _response_buffer.capacity);
    }

   private:
    ::zx::channel channel_;
  };

  struct AsyncEventHandlers;
  class fooResponseContext;
  class ClientImpl;

  // Pure-virtual interface to be implemented by a server.
  class Interface : public ::fidl::internal::IncomingMessageDispatcher {
   public:
    Interface() = default;
    virtual ~Interface() = default;

    // The marker protocol type within which this |Interface| class is defined.
    using _EnclosingProtocol = Example;

    class fooCompleterBase : public ::fidl::CompleterBase {
     public:
      // In the following methods, the return value indicates internal errors
      // during the reply, such as encoding or writing to the transport. Note
      // that any error will automatically lead to the destruction of the
      // binding, after which the |on_unbound| callback will be triggered with a
      // detailed reason.
      //
      // See //zircon/system/ulib/fidl/include/lib/fidl/llcpp/server.h.
      //
      // Because the reply status is identical to the unbinding status, it can
      // be safely ignored.
      ::fidl::Result Reply(
          ::llcpp::fidl::test::error::Example_foo_Result result);
      ::fidl::Result ReplySuccess(int64_t y);
      ::fidl::Result ReplyError(uint32_t error);
      ::fidl::Result Reply(
          ::fidl::BufferSpan _buffer,
          ::llcpp::fidl::test::error::Example_foo_Result result);
      ::fidl::Result ReplySuccess(::fidl::BufferSpan _buffer, int64_t y);

     protected:
      using ::fidl::CompleterBase::CompleterBase;
    };

    using fooCompleter = ::fidl::Completer<fooCompleterBase>;

    virtual void foo(::fidl::StringView s, fooCompleter::Sync& _completer) = 0;

   private:
    ::fidl::DispatchResult dispatch_message(fidl_incoming_msg_t* msg,
                                            ::fidl::Transaction* txn) final;
  };

  // Attempts to dispatch the incoming message to a handler function in the
  // server implementation. If there is no matching handler, it returns false,
  // leaving the message and transaction intact. In all other cases, it consumes
  // the message and returns true. It is possible to chain multiple TryDispatch
  // functions in this manner.
  static ::fidl::DispatchResult TryDispatch(Interface* impl,
                                            fidl_incoming_msg_t* msg,
                                            ::fidl::Transaction* txn);

  // Dispatches the incoming message to one of the handlers functions in the
  // protocol. If there is no matching handler, it closes all the handles in
  // |msg| and closes the channel with a |ZX_ERR_NOT_SUPPORTED| epitaph, before
  // returning false. The message should then be discarded.
  static ::fidl::DispatchResult Dispatch(Interface* impl,
                                         fidl_incoming_msg_t* msg,
                                         ::fidl::Transaction* txn);

  // Same as |Dispatch|, but takes a |void*| instead of |Interface*|.
  // Only used with |fidl::BindServer| to reduce template expansion.
  // Do not call this method manually. Use |Dispatch| instead.
  static ::fidl::DispatchResult TypeErasedDispatch(void* impl,
                                                   fidl_incoming_msg_t* msg,
                                                   ::fidl::Transaction* txn) {
    return Dispatch(static_cast<Interface*>(impl), msg, txn);
  }

  class EventSender;
  class WeakEventSender;
};

}  // namespace error
}  // namespace test
}  // namespace fidl
}  // namespace llcpp

namespace fidl {

template <>
struct IsFidlType<::llcpp::fidl::test::error::Example_foo_Response>
    : public std::true_type {};
template <>
struct IsStruct<::llcpp::fidl::test::error::Example_foo_Response>
    : public std::true_type {};
static_assert(std::is_standard_layout_v<
              ::llcpp::fidl::test::error::Example_foo_Response>);
static_assert(offsetof(::llcpp::fidl::test::error::Example_foo_Response, y) ==
              0);
static_assert(sizeof(::llcpp::fidl::test::error::Example_foo_Response) ==
              ::llcpp::fidl::test::error::Example_foo_Response::PrimarySize);

template <>
struct IsFidlType<::llcpp::fidl::test::error::Example_foo_Result>
    : public std::true_type {};
template <>
struct IsUnion<::llcpp::fidl::test::error::Example_foo_Result>
    : public std::true_type {};
static_assert(
    std::is_standard_layout_v<::llcpp::fidl::test::error::Example_foo_Result>);

template <>
struct IsFidlType<::llcpp::fidl::test::error::Example::fooRequest>
    : public std::true_type {};
template <>
struct IsFidlMessage<::llcpp::fidl::test::error::Example::fooRequest>
    : public std::true_type {};
static_assert(sizeof(::llcpp::fidl::test::error::Example::fooRequest) ==
              ::llcpp::fidl::test::error::Example::fooRequest::PrimarySize);
static_assert(offsetof(::llcpp::fidl::test::error::Example::fooRequest, s) ==
              16);

template <>
struct IsFidlType<::llcpp::fidl::test::error::Example::fooResponse>
    : public std::true_type {};
template <>
struct IsFidlMessage<::llcpp::fidl::test::error::Example::fooResponse>
    : public std::true_type {};
static_assert(sizeof(::llcpp::fidl::test::error::Example::fooResponse) ==
              ::llcpp::fidl::test::error::Example::fooResponse::PrimarySize);
static_assert(offsetof(::llcpp::fidl::test::error::Example::fooResponse,
                       result) == 16);

}  // namespace fidl

namespace llcpp {

namespace fidl {
namespace test {
namespace error {

struct Example::AsyncEventHandlers {};

class Example::fooResponseContext : public ::fidl::internal::ResponseContext {
 public:
  fooResponseContext();

  virtual void OnReply(Example::fooResponse* message) = 0;

 private:
  void OnReply(uint8_t* reply) override;
};

class Example::ClientImpl final : private ::fidl::internal::ClientBase {
 public:
  // Asynchronous variant of |Example.foo()|. The request and callback are
  // allocated on the heap.
  ::fidl::Result foo(::fidl::StringView s,
                     ::fit::callback<void(fooResponse* response)> _cb);
  // Asynchronous variant of |Example.foo()|. Caller provides the backing
  // storage for FIDL message via request buffer. Ownership of _context is given
  // unsafely to the binding until OnError() or OnReply() are called on it.
  ::fidl::Result foo(::fidl::BufferSpan _request_buffer, ::fidl::StringView s,
                     fooResponseContext* _context);
  // Synchronous variant of |Example.foo()|. Allocates 48 bytes of response
  // buffer on the stack. Request is heap-allocated.
  ResultOf::foo foo_Sync(::fidl::StringView s);

  // Synchronous variant of |Example.foo()|. Caller provides the backing storage
  // for FIDL message via request and response buffers.
  UnownedResultOf::foo foo_Sync(::fidl::BufferSpan _request_buffer,
                                ::fidl::StringView s,
                                ::fidl::BufferSpan _response_buffer);

 private:
  friend class ::fidl::Client<Example>;

  explicit ClientImpl(AsyncEventHandlers handlers)
      : handlers_(std::move(handlers)) {}

  std::optional<::fidl::UnbindInfo> DispatchEvent(
      fidl_incoming_msg_t* msg) override;

  AsyncEventHandlers handlers_;
};

// |EventSender| owns a server endpoint of a channel speaking
// the Example protocol, and can send events in that protocol.
class Example::EventSender {
 public:
  // Constructs an event sender with an invalid channel.
  EventSender() = default;

  // TODO(fxbug.dev/65212): EventSender should take a ::fidl::ServerEnd.
  explicit EventSender(::zx::channel server_end)
      : server_end_(std::move(server_end)) {}

  // The underlying server channel endpoint, which may be replaced at run-time.
  const ::zx::channel& channel() const { return server_end_; }
  ::zx::channel& channel() { return server_end_; }

  // Whether the underlying channel is valid.
  bool is_valid() const { return server_end_.is_valid(); }

 private:
  ::zx::channel server_end_;
};

class Example::WeakEventSender {
 public:
 private:
  friend class ::fidl::ServerBindingRef<Example>;

  explicit WeakEventSender(
      std::weak_ptr<::fidl::internal::AsyncServerBinding<Example>> binding)
      : binding_(std::move(binding)) {}

  std::weak_ptr<::fidl::internal::AsyncServerBinding<Example>> binding_;
};

}  // namespace error
}  // namespace test
}  // namespace fidl
}  // namespace llcpp