| // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![allow(non_camel_case_types)] |
| // FIXME: remove this after snapshot, and Results are handled |
| #![allow(unused_must_use)] |
| |
| use rustc::hir::map as ast_map; |
| use rustc::session::Session; |
| |
| use rustc::hir; |
| use rustc::hir::fold; |
| use rustc::hir::fold::Folder; |
| use rustc::hir::intravisit::{Visitor, IdRangeComputingVisitor, IdRange}; |
| |
| use common as c; |
| use cstore; |
| use decoder; |
| use encoder as e; |
| use tydecode; |
| use tyencode; |
| |
| use middle::cstore::{InlinedItem, InlinedItemRef}; |
| use rustc::ty::adjustment; |
| use rustc::ty::cast; |
| use middle::const_qualif::ConstQualif; |
| use rustc::hir::def::{self, Def}; |
| use rustc::hir::def_id::DefId; |
| use middle::region; |
| use rustc::ty::subst; |
| use rustc::ty::{self, Ty, TyCtxt}; |
| |
| use syntax::ast; |
| use syntax::ptr::P; |
| use syntax_pos; |
| |
| use std::cell::Cell; |
| use std::io::SeekFrom; |
| use std::io::prelude::*; |
| use std::fmt::Debug; |
| |
| use rbml::reader; |
| use rbml::writer::Encoder; |
| use rbml; |
| use rustc_serialize as serialize; |
| use rustc_serialize::{Decodable, Decoder, DecoderHelpers}; |
| use rustc_serialize::{Encodable, EncoderHelpers}; |
| |
| #[cfg(test)] use std::io::Cursor; |
| #[cfg(test)] use syntax::parse; |
| #[cfg(test)] use rustc::hir::print as pprust; |
| #[cfg(test)] use rustc::hir::lowering::{LoweringContext, DummyResolver}; |
| |
| struct DecodeContext<'a, 'b, 'tcx: 'a> { |
| tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| cdata: &'b cstore::CrateMetadata, |
| from_id_range: IdRange, |
| to_id_range: IdRange, |
| // Cache the last used filemap for translating spans as an optimization. |
| last_filemap_index: Cell<usize>, |
| } |
| |
| trait tr { |
| fn tr(&self, dcx: &DecodeContext) -> Self; |
| } |
| |
| // ______________________________________________________________________ |
| // Top-level methods. |
| |
| pub fn encode_inlined_item(ecx: &e::EncodeContext, |
| rbml_w: &mut Encoder, |
| ii: InlinedItemRef) { |
| let id = match ii { |
| InlinedItemRef::Item(i) => i.id, |
| InlinedItemRef::Foreign(i) => i.id, |
| InlinedItemRef::TraitItem(_, ti) => ti.id, |
| InlinedItemRef::ImplItem(_, ii) => ii.id, |
| }; |
| debug!("> Encoding inlined item: {} ({:?})", |
| ecx.tcx.node_path_str(id), |
| rbml_w.writer.seek(SeekFrom::Current(0))); |
| |
| // Folding could be avoided with a smarter encoder. |
| let (ii, expected_id_range) = simplify_ast(ii); |
| let id_range = inlined_item_id_range(&ii); |
| assert_eq!(expected_id_range, id_range); |
| |
| rbml_w.start_tag(c::tag_ast as usize); |
| id_range.encode(rbml_w); |
| encode_ast(rbml_w, &ii); |
| encode_side_tables_for_ii(ecx, rbml_w, &ii); |
| rbml_w.end_tag(); |
| |
| debug!("< Encoded inlined fn: {} ({:?})", |
| ecx.tcx.node_path_str(id), |
| rbml_w.writer.seek(SeekFrom::Current(0))); |
| } |
| |
| impl<'a, 'b, 'c, 'tcx> ast_map::FoldOps for &'a DecodeContext<'b, 'c, 'tcx> { |
| fn new_id(&self, id: ast::NodeId) -> ast::NodeId { |
| if id == ast::DUMMY_NODE_ID { |
| // Used by ast_map to map the NodeInlinedParent. |
| self.tcx.sess.next_node_id() |
| } else { |
| self.tr_id(id) |
| } |
| } |
| fn new_def_id(&self, def_id: DefId) -> DefId { |
| self.tr_def_id(def_id) |
| } |
| fn new_span(&self, span: syntax_pos::Span) -> syntax_pos::Span { |
| self.tr_span(span) |
| } |
| } |
| |
| /// Decodes an item from its AST in the cdata's metadata and adds it to the |
| /// ast-map. |
| pub fn decode_inlined_item<'a, 'tcx>(cdata: &cstore::CrateMetadata, |
| tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| parent_def_path: ast_map::DefPath, |
| parent_did: DefId, |
| ast_doc: rbml::Doc, |
| orig_did: DefId) |
| -> &'tcx InlinedItem { |
| debug!("> Decoding inlined fn: {:?}", tcx.item_path_str(orig_did)); |
| let mut ast_dsr = reader::Decoder::new(ast_doc); |
| let from_id_range = Decodable::decode(&mut ast_dsr).unwrap(); |
| let to_id_range = reserve_id_range(&tcx.sess, from_id_range); |
| let dcx = &DecodeContext { |
| cdata: cdata, |
| tcx: tcx, |
| from_id_range: from_id_range, |
| to_id_range: to_id_range, |
| last_filemap_index: Cell::new(0) |
| }; |
| let ii = ast_map::map_decoded_item(&dcx.tcx.map, |
| parent_def_path, |
| parent_did, |
| decode_ast(ast_doc), |
| dcx); |
| let name = match *ii { |
| InlinedItem::Item(ref i) => i.name, |
| InlinedItem::Foreign(ref i) => i.name, |
| InlinedItem::TraitItem(_, ref ti) => ti.name, |
| InlinedItem::ImplItem(_, ref ii) => ii.name |
| }; |
| debug!("Fn named: {}", name); |
| debug!("< Decoded inlined fn: {}::{}", |
| tcx.item_path_str(parent_did), |
| name); |
| region::resolve_inlined_item(&tcx.sess, &tcx.region_maps, ii); |
| decode_side_tables(dcx, ast_doc); |
| copy_item_types(dcx, ii, orig_did); |
| if let InlinedItem::Item(ref i) = *ii { |
| debug!(">>> DECODED ITEM >>>\n{}\n<<< DECODED ITEM <<<", |
| ::rustc::hir::print::item_to_string(&i)); |
| } |
| |
| ii |
| } |
| |
| // ______________________________________________________________________ |
| // Enumerating the IDs which appear in an AST |
| |
| fn reserve_id_range(sess: &Session, |
| from_id_range: IdRange) -> IdRange { |
| // Handle the case of an empty range: |
| if from_id_range.empty() { return from_id_range; } |
| let cnt = from_id_range.max - from_id_range.min; |
| let to_id_min = sess.reserve_node_ids(cnt); |
| let to_id_max = to_id_min + cnt; |
| IdRange { min: to_id_min, max: to_id_max } |
| } |
| |
| impl<'a, 'b, 'tcx> DecodeContext<'a, 'b, 'tcx> { |
| /// Translates an internal id, meaning a node id that is known to refer to some part of the |
| /// item currently being inlined, such as a local variable or argument. All naked node-ids |
| /// that appear in types have this property, since if something might refer to an external item |
| /// we would use a def-id to allow for the possibility that the item resides in another crate. |
| pub fn tr_id(&self, id: ast::NodeId) -> ast::NodeId { |
| // from_id_range should be non-empty |
| assert!(!self.from_id_range.empty()); |
| // Make sure that translating the NodeId will actually yield a |
| // meaningful result |
| assert!(self.from_id_range.contains(id)); |
| |
| // Use wrapping arithmetic because otherwise it introduces control flow. |
| // Maybe we should just have the control flow? -- aatch |
| (id.wrapping_sub(self.from_id_range.min).wrapping_add(self.to_id_range.min)) |
| } |
| |
| /// Translates an EXTERNAL def-id, converting the crate number from the one used in the encoded |
| /// data to the current crate numbers.. By external, I mean that it be translated to a |
| /// reference to the item in its original crate, as opposed to being translated to a reference |
| /// to the inlined version of the item. This is typically, but not always, what you want, |
| /// because most def-ids refer to external things like types or other fns that may or may not |
| /// be inlined. Note that even when the inlined function is referencing itself recursively, we |
| /// would want `tr_def_id` for that reference--- conceptually the function calls the original, |
| /// non-inlined version, and trans deals with linking that recursive call to the inlined copy. |
| pub fn tr_def_id(&self, did: DefId) -> DefId { |
| decoder::translate_def_id(self.cdata, did) |
| } |
| |
| /// Translates a `Span` from an extern crate to the corresponding `Span` |
| /// within the local crate's codemap. |
| pub fn tr_span(&self, span: syntax_pos::Span) -> syntax_pos::Span { |
| decoder::translate_span(self.cdata, |
| self.tcx.sess.codemap(), |
| &self.last_filemap_index, |
| span) |
| } |
| } |
| |
| impl tr for DefId { |
| fn tr(&self, dcx: &DecodeContext) -> DefId { |
| dcx.tr_def_id(*self) |
| } |
| } |
| |
| impl tr for Option<DefId> { |
| fn tr(&self, dcx: &DecodeContext) -> Option<DefId> { |
| self.map(|d| dcx.tr_def_id(d)) |
| } |
| } |
| |
| impl tr for syntax_pos::Span { |
| fn tr(&self, dcx: &DecodeContext) -> syntax_pos::Span { |
| dcx.tr_span(*self) |
| } |
| } |
| |
| trait def_id_encoder_helpers { |
| fn emit_def_id(&mut self, did: DefId); |
| } |
| |
| impl<S:serialize::Encoder> def_id_encoder_helpers for S |
| where <S as serialize::Encoder>::Error: Debug |
| { |
| fn emit_def_id(&mut self, did: DefId) { |
| did.encode(self).unwrap() |
| } |
| } |
| |
| trait def_id_decoder_helpers { |
| fn read_def_id(&mut self, dcx: &DecodeContext) -> DefId; |
| fn read_def_id_nodcx(&mut self, |
| cdata: &cstore::CrateMetadata) -> DefId; |
| } |
| |
| impl<D:serialize::Decoder> def_id_decoder_helpers for D |
| where <D as serialize::Decoder>::Error: Debug |
| { |
| fn read_def_id(&mut self, dcx: &DecodeContext) -> DefId { |
| let did: DefId = Decodable::decode(self).unwrap(); |
| did.tr(dcx) |
| } |
| |
| fn read_def_id_nodcx(&mut self, |
| cdata: &cstore::CrateMetadata) |
| -> DefId { |
| let did: DefId = Decodable::decode(self).unwrap(); |
| decoder::translate_def_id(cdata, did) |
| } |
| } |
| |
| // ______________________________________________________________________ |
| // Encoding and decoding the AST itself |
| // |
| // When decoding, we have to renumber the AST so that the node ids that |
| // appear within are disjoint from the node ids in our existing ASTs. |
| // We also have to adjust the spans: for now we just insert a dummy span, |
| // but eventually we should add entries to the local codemap as required. |
| |
| fn encode_ast(rbml_w: &mut Encoder, item: &InlinedItem) { |
| rbml_w.start_tag(c::tag_tree as usize); |
| rbml_w.emit_opaque(|this| item.encode(this)); |
| rbml_w.end_tag(); |
| } |
| |
| struct NestedItemsDropper { |
| id_range: IdRange |
| } |
| |
| impl Folder for NestedItemsDropper { |
| |
| // The unit tests below run on HIR with NodeIds not properly assigned. That |
| // causes an integer overflow. So we just don't track the id_range when |
| // building the unit tests. |
| #[cfg(not(test))] |
| fn new_id(&mut self, id: ast::NodeId) -> ast::NodeId { |
| // Record the range of NodeIds we are visiting, so we can do a sanity |
| // check later |
| self.id_range.add(id); |
| id |
| } |
| |
| fn fold_block(&mut self, blk: P<hir::Block>) -> P<hir::Block> { |
| blk.and_then(|hir::Block {id, stmts, expr, rules, span, ..}| { |
| let stmts_sans_items = stmts.into_iter().filter_map(|stmt| { |
| let use_stmt = match stmt.node { |
| hir::StmtExpr(_, _) | hir::StmtSemi(_, _) => true, |
| hir::StmtDecl(ref decl, _) => { |
| match decl.node { |
| hir::DeclLocal(_) => true, |
| hir::DeclItem(_) => false, |
| } |
| } |
| }; |
| if use_stmt { |
| Some(stmt) |
| } else { |
| None |
| } |
| }).collect(); |
| let blk_sans_items = P(hir::Block { |
| stmts: stmts_sans_items, |
| expr: expr, |
| id: id, |
| rules: rules, |
| span: span, |
| }); |
| fold::noop_fold_block(blk_sans_items, self) |
| }) |
| } |
| } |
| |
| // Produces a simplified copy of the AST which does not include things |
| // that we do not need to or do not want to export. For example, we |
| // do not include any nested items: if these nested items are to be |
| // inlined, their AST will be exported separately (this only makes |
| // sense because, in Rust, nested items are independent except for |
| // their visibility). |
| // |
| // As it happens, trans relies on the fact that we do not export |
| // nested items, as otherwise it would get confused when translating |
| // inlined items. |
| fn simplify_ast(ii: InlinedItemRef) -> (InlinedItem, IdRange) { |
| let mut fld = NestedItemsDropper { |
| id_range: IdRange::max() |
| }; |
| |
| let ii = match ii { |
| // HACK we're not dropping items. |
| InlinedItemRef::Item(i) => { |
| InlinedItem::Item(P(fold::noop_fold_item(i.clone(), &mut fld))) |
| } |
| InlinedItemRef::TraitItem(d, ti) => { |
| InlinedItem::TraitItem(d, P(fold::noop_fold_trait_item(ti.clone(), &mut fld))) |
| } |
| InlinedItemRef::ImplItem(d, ii) => { |
| InlinedItem::ImplItem(d, P(fold::noop_fold_impl_item(ii.clone(), &mut fld))) |
| } |
| InlinedItemRef::Foreign(i) => { |
| InlinedItem::Foreign(P(fold::noop_fold_foreign_item(i.clone(), &mut fld))) |
| } |
| }; |
| |
| (ii, fld.id_range) |
| } |
| |
| fn decode_ast(item_doc: rbml::Doc) -> InlinedItem { |
| let chi_doc = item_doc.get(c::tag_tree as usize); |
| let mut rbml_r = reader::Decoder::new(chi_doc); |
| rbml_r.read_opaque(|decoder, _| Decodable::decode(decoder)).unwrap() |
| } |
| |
| // ______________________________________________________________________ |
| // Encoding and decoding of ast::def |
| |
| fn decode_def(dcx: &DecodeContext, dsr: &mut reader::Decoder) -> Def { |
| let def: Def = Decodable::decode(dsr).unwrap(); |
| def.tr(dcx) |
| } |
| |
| impl tr for Def { |
| fn tr(&self, dcx: &DecodeContext) -> Def { |
| match *self { |
| Def::Fn(did) => Def::Fn(did.tr(dcx)), |
| Def::Method(did) => Def::Method(did.tr(dcx)), |
| Def::SelfTy(opt_did, impl_id) => { |
| // Since the impl_id will never lie within the reserved range of |
| // imported NodeIds, it does not make sense to translate it. |
| // The result would not make any sense within the importing crate. |
| // We also don't allow for impl items to be inlined (just their |
| // members), so even if we had a DefId here, we wouldn't be able |
| // to do much with it. |
| // So, we set the id to DUMMY_NODE_ID. That way we make it |
| // explicit that this is no usable NodeId. |
| Def::SelfTy(opt_did.map(|did| did.tr(dcx)), |
| impl_id.map(|_| ast::DUMMY_NODE_ID)) |
| } |
| Def::Mod(did) => { Def::Mod(did.tr(dcx)) } |
| Def::ForeignMod(did) => { Def::ForeignMod(did.tr(dcx)) } |
| Def::Static(did, m) => { Def::Static(did.tr(dcx), m) } |
| Def::Const(did) => { Def::Const(did.tr(dcx)) } |
| Def::AssociatedConst(did) => Def::AssociatedConst(did.tr(dcx)), |
| Def::Local(_, nid) => { |
| let nid = dcx.tr_id(nid); |
| let did = dcx.tcx.map.local_def_id(nid); |
| Def::Local(did, nid) |
| } |
| Def::Variant(e_did, v_did) => Def::Variant(e_did.tr(dcx), v_did.tr(dcx)), |
| Def::Trait(did) => Def::Trait(did.tr(dcx)), |
| Def::Enum(did) => Def::Enum(did.tr(dcx)), |
| Def::TyAlias(did) => Def::TyAlias(did.tr(dcx)), |
| Def::AssociatedTy(trait_did, did) => |
| Def::AssociatedTy(trait_did.tr(dcx), did.tr(dcx)), |
| Def::PrimTy(p) => Def::PrimTy(p), |
| Def::TyParam(s, index, def_id, n) => Def::TyParam(s, index, def_id.tr(dcx), n), |
| Def::Upvar(_, nid1, index, nid2) => { |
| let nid1 = dcx.tr_id(nid1); |
| let nid2 = dcx.tr_id(nid2); |
| let did1 = dcx.tcx.map.local_def_id(nid1); |
| Def::Upvar(did1, nid1, index, nid2) |
| } |
| Def::Struct(did) => Def::Struct(did.tr(dcx)), |
| Def::Label(nid) => Def::Label(dcx.tr_id(nid)), |
| Def::Err => Def::Err, |
| } |
| } |
| } |
| |
| // ______________________________________________________________________ |
| // Encoding and decoding of freevar information |
| |
| fn encode_freevar_entry(rbml_w: &mut Encoder, fv: &hir::Freevar) { |
| (*fv).encode(rbml_w).unwrap(); |
| } |
| |
| trait rbml_decoder_helper { |
| fn read_freevar_entry(&mut self, dcx: &DecodeContext) |
| -> hir::Freevar; |
| fn read_capture_mode(&mut self) -> hir::CaptureClause; |
| } |
| |
| impl<'a> rbml_decoder_helper for reader::Decoder<'a> { |
| fn read_freevar_entry(&mut self, dcx: &DecodeContext) |
| -> hir::Freevar { |
| let fv: hir::Freevar = Decodable::decode(self).unwrap(); |
| fv.tr(dcx) |
| } |
| |
| fn read_capture_mode(&mut self) -> hir::CaptureClause { |
| let cm: hir::CaptureClause = Decodable::decode(self).unwrap(); |
| cm |
| } |
| } |
| |
| impl tr for hir::Freevar { |
| fn tr(&self, dcx: &DecodeContext) -> hir::Freevar { |
| hir::Freevar { |
| def: self.def.tr(dcx), |
| span: self.span.tr(dcx), |
| } |
| } |
| } |
| |
| // ______________________________________________________________________ |
| // Encoding and decoding of MethodCallee |
| |
| trait read_method_callee_helper<'tcx> { |
| fn read_method_callee<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> (u32, ty::MethodCallee<'tcx>); |
| } |
| |
| fn encode_method_callee<'a, 'tcx>(ecx: &e::EncodeContext<'a, 'tcx>, |
| rbml_w: &mut Encoder, |
| autoderef: u32, |
| method: &ty::MethodCallee<'tcx>) { |
| use rustc_serialize::Encoder; |
| |
| rbml_w.emit_struct("MethodCallee", 4, |rbml_w| { |
| rbml_w.emit_struct_field("autoderef", 0, |rbml_w| { |
| autoderef.encode(rbml_w) |
| }); |
| rbml_w.emit_struct_field("def_id", 1, |rbml_w| { |
| Ok(rbml_w.emit_def_id(method.def_id)) |
| }); |
| rbml_w.emit_struct_field("ty", 2, |rbml_w| { |
| Ok(rbml_w.emit_ty(ecx, method.ty)) |
| }); |
| rbml_w.emit_struct_field("substs", 3, |rbml_w| { |
| Ok(rbml_w.emit_substs(ecx, &method.substs)) |
| }) |
| }).unwrap(); |
| } |
| |
| impl<'a, 'tcx> read_method_callee_helper<'tcx> for reader::Decoder<'a> { |
| fn read_method_callee<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> (u32, ty::MethodCallee<'tcx>) { |
| |
| self.read_struct("MethodCallee", 4, |this| { |
| let autoderef = this.read_struct_field("autoderef", 0, |
| Decodable::decode).unwrap(); |
| Ok((autoderef, ty::MethodCallee { |
| def_id: this.read_struct_field("def_id", 1, |this| { |
| Ok(this.read_def_id(dcx)) |
| }).unwrap(), |
| ty: this.read_struct_field("ty", 2, |this| { |
| Ok(this.read_ty(dcx)) |
| }).unwrap(), |
| substs: this.read_struct_field("substs", 3, |this| { |
| Ok(dcx.tcx.mk_substs(this.read_substs(dcx))) |
| }).unwrap() |
| })) |
| }).unwrap() |
| } |
| } |
| |
| pub fn encode_cast_kind(ebml_w: &mut Encoder, kind: cast::CastKind) { |
| kind.encode(ebml_w).unwrap(); |
| } |
| |
| // ______________________________________________________________________ |
| // Encoding and decoding the side tables |
| |
| trait rbml_writer_helpers<'tcx> { |
| fn emit_region(&mut self, ecx: &e::EncodeContext, r: ty::Region); |
| fn emit_ty<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, ty: Ty<'tcx>); |
| fn emit_tys<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, tys: &[Ty<'tcx>]); |
| fn emit_predicate<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, |
| predicate: &ty::Predicate<'tcx>); |
| fn emit_trait_ref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, |
| ty: &ty::TraitRef<'tcx>); |
| fn emit_substs<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, |
| substs: &subst::Substs<'tcx>); |
| fn emit_existential_bounds<'b>(&mut self, ecx: &e::EncodeContext<'b,'tcx>, |
| bounds: &ty::ExistentialBounds<'tcx>); |
| fn emit_builtin_bounds(&mut self, ecx: &e::EncodeContext, bounds: &ty::BuiltinBounds); |
| fn emit_upvar_capture(&mut self, ecx: &e::EncodeContext, capture: &ty::UpvarCapture); |
| fn emit_auto_adjustment<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, |
| adj: &adjustment::AutoAdjustment<'tcx>); |
| fn emit_autoref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, |
| autoref: &adjustment::AutoRef<'tcx>); |
| fn emit_auto_deref_ref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, |
| auto_deref_ref: &adjustment::AutoDerefRef<'tcx>); |
| } |
| |
| impl<'a, 'tcx> rbml_writer_helpers<'tcx> for Encoder<'a> { |
| fn emit_region(&mut self, ecx: &e::EncodeContext, r: ty::Region) { |
| self.emit_opaque(|this| Ok(tyencode::enc_region(&mut this.cursor, |
| &ecx.ty_str_ctxt(), |
| r))); |
| } |
| |
| fn emit_ty<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, ty: Ty<'tcx>) { |
| self.emit_opaque(|this| Ok(tyencode::enc_ty(&mut this.cursor, |
| &ecx.ty_str_ctxt(), |
| ty))); |
| } |
| |
| fn emit_tys<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, tys: &[Ty<'tcx>]) { |
| self.emit_from_vec(tys, |this, ty| Ok(this.emit_ty(ecx, *ty))); |
| } |
| |
| fn emit_trait_ref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, |
| trait_ref: &ty::TraitRef<'tcx>) { |
| self.emit_opaque(|this| Ok(tyencode::enc_trait_ref(&mut this.cursor, |
| &ecx.ty_str_ctxt(), |
| *trait_ref))); |
| } |
| |
| fn emit_predicate<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, |
| predicate: &ty::Predicate<'tcx>) { |
| self.emit_opaque(|this| { |
| Ok(tyencode::enc_predicate(&mut this.cursor, |
| &ecx.ty_str_ctxt(), |
| predicate)) |
| }); |
| } |
| |
| fn emit_existential_bounds<'b>(&mut self, ecx: &e::EncodeContext<'b,'tcx>, |
| bounds: &ty::ExistentialBounds<'tcx>) { |
| self.emit_opaque(|this| Ok(tyencode::enc_existential_bounds(&mut this.cursor, |
| &ecx.ty_str_ctxt(), |
| bounds))); |
| } |
| |
| fn emit_builtin_bounds(&mut self, ecx: &e::EncodeContext, bounds: &ty::BuiltinBounds) { |
| self.emit_opaque(|this| Ok(tyencode::enc_builtin_bounds(&mut this.cursor, |
| &ecx.ty_str_ctxt(), |
| bounds))); |
| } |
| |
| fn emit_upvar_capture(&mut self, ecx: &e::EncodeContext, capture: &ty::UpvarCapture) { |
| use rustc_serialize::Encoder; |
| |
| self.emit_enum("UpvarCapture", |this| { |
| match *capture { |
| ty::UpvarCapture::ByValue => { |
| this.emit_enum_variant("ByValue", 1, 0, |_| Ok(())) |
| } |
| ty::UpvarCapture::ByRef(ty::UpvarBorrow { kind, region }) => { |
| this.emit_enum_variant("ByRef", 2, 0, |this| { |
| this.emit_enum_variant_arg(0, |
| |this| kind.encode(this)); |
| this.emit_enum_variant_arg(1, |
| |this| Ok(this.emit_region(ecx, region))) |
| }) |
| } |
| } |
| }).unwrap() |
| } |
| |
| fn emit_substs<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, |
| substs: &subst::Substs<'tcx>) { |
| self.emit_opaque(|this| Ok(tyencode::enc_substs(&mut this.cursor, |
| &ecx.ty_str_ctxt(), |
| substs))); |
| } |
| |
| fn emit_auto_adjustment<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, |
| adj: &adjustment::AutoAdjustment<'tcx>) { |
| use rustc_serialize::Encoder; |
| |
| self.emit_enum("AutoAdjustment", |this| { |
| match *adj { |
| adjustment::AdjustReifyFnPointer => { |
| this.emit_enum_variant("AdjustReifyFnPointer", 1, 0, |_| Ok(())) |
| } |
| |
| adjustment::AdjustUnsafeFnPointer => { |
| this.emit_enum_variant("AdjustUnsafeFnPointer", 2, 0, |_| { |
| Ok(()) |
| }) |
| } |
| |
| adjustment::AdjustMutToConstPointer => { |
| this.emit_enum_variant("AdjustMutToConstPointer", 3, 0, |_| { |
| Ok(()) |
| }) |
| } |
| |
| adjustment::AdjustDerefRef(ref auto_deref_ref) => { |
| this.emit_enum_variant("AdjustDerefRef", 4, 2, |this| { |
| this.emit_enum_variant_arg(0, |
| |this| Ok(this.emit_auto_deref_ref(ecx, auto_deref_ref))) |
| }) |
| } |
| } |
| }); |
| } |
| |
| fn emit_autoref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, |
| autoref: &adjustment::AutoRef<'tcx>) { |
| use rustc_serialize::Encoder; |
| |
| self.emit_enum("AutoRef", |this| { |
| match autoref { |
| &adjustment::AutoPtr(r, m) => { |
| this.emit_enum_variant("AutoPtr", 0, 2, |this| { |
| this.emit_enum_variant_arg(0, |
| |this| Ok(this.emit_region(ecx, *r))); |
| this.emit_enum_variant_arg(1, |this| m.encode(this)) |
| }) |
| } |
| &adjustment::AutoUnsafe(m) => { |
| this.emit_enum_variant("AutoUnsafe", 1, 1, |this| { |
| this.emit_enum_variant_arg(0, |this| m.encode(this)) |
| }) |
| } |
| } |
| }); |
| } |
| |
| fn emit_auto_deref_ref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, |
| auto_deref_ref: &adjustment::AutoDerefRef<'tcx>) { |
| use rustc_serialize::Encoder; |
| |
| self.emit_struct("AutoDerefRef", 2, |this| { |
| this.emit_struct_field("autoderefs", 0, |this| auto_deref_ref.autoderefs.encode(this)); |
| |
| this.emit_struct_field("autoref", 1, |this| { |
| this.emit_option(|this| { |
| match auto_deref_ref.autoref { |
| None => this.emit_option_none(), |
| Some(ref a) => this.emit_option_some(|this| Ok(this.emit_autoref(ecx, a))), |
| } |
| }) |
| }); |
| |
| this.emit_struct_field("unsize", 2, |this| { |
| this.emit_option(|this| { |
| match auto_deref_ref.unsize { |
| None => this.emit_option_none(), |
| Some(target) => this.emit_option_some(|this| { |
| Ok(this.emit_ty(ecx, target)) |
| }) |
| } |
| }) |
| }) |
| }); |
| } |
| } |
| |
| trait write_tag_and_id { |
| fn tag<F>(&mut self, tag_id: c::astencode_tag, f: F) where F: FnOnce(&mut Self); |
| fn id(&mut self, id: ast::NodeId); |
| } |
| |
| impl<'a> write_tag_and_id for Encoder<'a> { |
| fn tag<F>(&mut self, |
| tag_id: c::astencode_tag, |
| f: F) where |
| F: FnOnce(&mut Encoder<'a>), |
| { |
| self.start_tag(tag_id as usize); |
| f(self); |
| self.end_tag(); |
| } |
| |
| fn id(&mut self, id: ast::NodeId) { |
| id.encode(self).unwrap(); |
| } |
| } |
| |
| struct SideTableEncodingIdVisitor<'a, 'b:'a, 'c:'a, 'tcx:'c> { |
| ecx: &'a e::EncodeContext<'c, 'tcx>, |
| rbml_w: &'a mut Encoder<'b>, |
| } |
| |
| impl<'a, 'b, 'c, 'tcx, 'v> Visitor<'v> for |
| SideTableEncodingIdVisitor<'a, 'b, 'c, 'tcx> { |
| fn visit_id(&mut self, id: ast::NodeId) { |
| encode_side_tables_for_id(self.ecx, self.rbml_w, id) |
| } |
| } |
| |
| fn encode_side_tables_for_ii(ecx: &e::EncodeContext, |
| rbml_w: &mut Encoder, |
| ii: &InlinedItem) { |
| rbml_w.start_tag(c::tag_table as usize); |
| ii.visit(&mut SideTableEncodingIdVisitor { |
| ecx: ecx, |
| rbml_w: rbml_w |
| }); |
| rbml_w.end_tag(); |
| } |
| |
| fn encode_side_tables_for_id(ecx: &e::EncodeContext, |
| rbml_w: &mut Encoder, |
| id: ast::NodeId) { |
| let tcx = ecx.tcx; |
| |
| debug!("Encoding side tables for id {}", id); |
| |
| if let Some(def) = tcx.expect_def_or_none(id) { |
| rbml_w.tag(c::tag_table_def, |rbml_w| { |
| rbml_w.id(id); |
| def.encode(rbml_w).unwrap(); |
| }) |
| } |
| |
| if let Some(ty) = tcx.node_types().get(&id) { |
| rbml_w.tag(c::tag_table_node_type, |rbml_w| { |
| rbml_w.id(id); |
| rbml_w.emit_ty(ecx, *ty); |
| }) |
| } |
| |
| if let Some(item_substs) = tcx.tables.borrow().item_substs.get(&id) { |
| rbml_w.tag(c::tag_table_item_subst, |rbml_w| { |
| rbml_w.id(id); |
| rbml_w.emit_substs(ecx, &item_substs.substs); |
| }) |
| } |
| |
| if let Some(fv) = tcx.freevars.borrow().get(&id) { |
| rbml_w.tag(c::tag_table_freevars, |rbml_w| { |
| rbml_w.id(id); |
| rbml_w.emit_from_vec(fv, |rbml_w, fv_entry| { |
| Ok(encode_freevar_entry(rbml_w, fv_entry)) |
| }); |
| }); |
| |
| for freevar in fv { |
| rbml_w.tag(c::tag_table_upvar_capture_map, |rbml_w| { |
| rbml_w.id(id); |
| |
| let var_id = freevar.def.var_id(); |
| let upvar_id = ty::UpvarId { |
| var_id: var_id, |
| closure_expr_id: id |
| }; |
| let upvar_capture = tcx.tables |
| .borrow() |
| .upvar_capture_map |
| .get(&upvar_id) |
| .unwrap() |
| .clone(); |
| var_id.encode(rbml_w); |
| rbml_w.emit_upvar_capture(ecx, &upvar_capture); |
| }) |
| } |
| } |
| |
| let method_call = ty::MethodCall::expr(id); |
| if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) { |
| rbml_w.tag(c::tag_table_method_map, |rbml_w| { |
| rbml_w.id(id); |
| encode_method_callee(ecx, rbml_w, method_call.autoderef, method) |
| }) |
| } |
| |
| if let Some(adjustment) = tcx.tables.borrow().adjustments.get(&id) { |
| match *adjustment { |
| adjustment::AdjustDerefRef(ref adj) => { |
| for autoderef in 0..adj.autoderefs { |
| let method_call = ty::MethodCall::autoderef(id, autoderef as u32); |
| if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) { |
| rbml_w.tag(c::tag_table_method_map, |rbml_w| { |
| rbml_w.id(id); |
| encode_method_callee(ecx, rbml_w, |
| method_call.autoderef, method) |
| }) |
| } |
| } |
| } |
| _ => {} |
| } |
| |
| rbml_w.tag(c::tag_table_adjustments, |rbml_w| { |
| rbml_w.id(id); |
| rbml_w.emit_auto_adjustment(ecx, adjustment); |
| }) |
| } |
| |
| if let Some(cast_kind) = tcx.cast_kinds.borrow().get(&id) { |
| rbml_w.tag(c::tag_table_cast_kinds, |rbml_w| { |
| rbml_w.id(id); |
| encode_cast_kind(rbml_w, *cast_kind) |
| }) |
| } |
| |
| if let Some(qualif) = tcx.const_qualif_map.borrow().get(&id) { |
| rbml_w.tag(c::tag_table_const_qualif, |rbml_w| { |
| rbml_w.id(id); |
| qualif.encode(rbml_w).unwrap() |
| }) |
| } |
| } |
| |
| trait doc_decoder_helpers: Sized { |
| fn as_int(&self) -> isize; |
| fn opt_child(&self, tag: c::astencode_tag) -> Option<Self>; |
| } |
| |
| impl<'a> doc_decoder_helpers for rbml::Doc<'a> { |
| fn as_int(&self) -> isize { reader::doc_as_u64(*self) as isize } |
| fn opt_child(&self, tag: c::astencode_tag) -> Option<rbml::Doc<'a>> { |
| reader::maybe_get_doc(*self, tag as usize) |
| } |
| } |
| |
| trait rbml_decoder_decoder_helpers<'tcx> { |
| fn read_ty_encoded<'a, 'b, F, R>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>, |
| f: F) -> R |
| where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x, 'tcx>) -> R; |
| |
| fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region; |
| fn read_ty<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Ty<'tcx>; |
| fn read_tys<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Vec<Ty<'tcx>>; |
| fn read_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> ty::TraitRef<'tcx>; |
| fn read_poly_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> ty::PolyTraitRef<'tcx>; |
| fn read_predicate<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> ty::Predicate<'tcx>; |
| fn read_existential_bounds<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> ty::ExistentialBounds<'tcx>; |
| fn read_substs<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> subst::Substs<'tcx>; |
| fn read_upvar_capture(&mut self, dcx: &DecodeContext) |
| -> ty::UpvarCapture; |
| fn read_auto_adjustment<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> adjustment::AutoAdjustment<'tcx>; |
| fn read_cast_kind<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> cast::CastKind; |
| fn read_auto_deref_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> adjustment::AutoDerefRef<'tcx>; |
| fn read_autoref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) |
| -> adjustment::AutoRef<'tcx>; |
| |
| // Versions of the type reading functions that don't need the full |
| // DecodeContext. |
| fn read_ty_nodcx<'a>(&mut self, tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| cdata: &cstore::CrateMetadata) -> Ty<'tcx>; |
| fn read_tys_nodcx<'a>(&mut self, tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| cdata: &cstore::CrateMetadata) -> Vec<Ty<'tcx>>; |
| fn read_substs_nodcx<'a>(&mut self, tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| cdata: &cstore::CrateMetadata) |
| -> subst::Substs<'tcx>; |
| } |
| |
| impl<'a, 'tcx> rbml_decoder_decoder_helpers<'tcx> for reader::Decoder<'a> { |
| fn read_ty_nodcx<'b>(&mut self, tcx: TyCtxt<'b, 'tcx, 'tcx>, |
| cdata: &cstore::CrateMetadata) |
| -> Ty<'tcx> { |
| self.read_opaque(|_, doc| { |
| Ok( |
| tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc, |
| &mut |id| decoder::translate_def_id(cdata, id)) |
| .parse_ty()) |
| }).unwrap() |
| } |
| |
| fn read_tys_nodcx<'b>(&mut self, tcx: TyCtxt<'b, 'tcx, 'tcx>, |
| cdata: &cstore::CrateMetadata) -> Vec<Ty<'tcx>> { |
| self.read_to_vec(|this| Ok(this.read_ty_nodcx(tcx, cdata)) ) |
| .unwrap() |
| .into_iter() |
| .collect() |
| } |
| |
| fn read_substs_nodcx<'b>(&mut self, tcx: TyCtxt<'b, 'tcx, 'tcx>, |
| cdata: &cstore::CrateMetadata) |
| -> subst::Substs<'tcx> |
| { |
| self.read_opaque(|_, doc| { |
| Ok( |
| tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc, |
| &mut |id| decoder::translate_def_id(cdata, id)) |
| .parse_substs()) |
| }).unwrap() |
| } |
| |
| fn read_ty_encoded<'b, 'c, F, R>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>, op: F) -> R |
| where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x,'tcx>) -> R |
| { |
| return self.read_opaque(|_, doc| { |
| debug!("read_ty_encoded({})", type_string(doc)); |
| Ok(op( |
| &mut tydecode::TyDecoder::with_doc( |
| dcx.tcx, dcx.cdata.cnum, doc, |
| &mut |d| convert_def_id(dcx, d)))) |
| }).unwrap(); |
| |
| fn type_string(doc: rbml::Doc) -> String { |
| let mut str = String::new(); |
| for i in doc.start..doc.end { |
| str.push(doc.data[i] as char); |
| } |
| str |
| } |
| } |
| fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region { |
| // Note: regions types embed local node ids. In principle, we |
| // should translate these node ids into the new decode |
| // context. However, we do not bother, because region types |
| // are not used during trans. This also applies to read_ty. |
| return self.read_ty_encoded(dcx, |decoder| decoder.parse_region()); |
| } |
| fn read_ty<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) -> Ty<'tcx> { |
| return self.read_ty_encoded(dcx, |decoder| decoder.parse_ty()); |
| } |
| |
| fn read_tys<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> Vec<Ty<'tcx>> { |
| self.read_to_vec(|this| Ok(this.read_ty(dcx))).unwrap().into_iter().collect() |
| } |
| |
| fn read_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> ty::TraitRef<'tcx> { |
| self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref()) |
| } |
| |
| fn read_poly_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> ty::PolyTraitRef<'tcx> { |
| ty::Binder(self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref())) |
| } |
| |
| fn read_predicate<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> ty::Predicate<'tcx> |
| { |
| self.read_ty_encoded(dcx, |decoder| decoder.parse_predicate()) |
| } |
| |
| fn read_existential_bounds<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> ty::ExistentialBounds<'tcx> |
| { |
| self.read_ty_encoded(dcx, |decoder| decoder.parse_existential_bounds()) |
| } |
| |
| fn read_substs<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> subst::Substs<'tcx> { |
| self.read_opaque(|_, doc| { |
| Ok(tydecode::TyDecoder::with_doc(dcx.tcx, dcx.cdata.cnum, doc, |
| &mut |d| convert_def_id(dcx, d)) |
| .parse_substs()) |
| }).unwrap() |
| } |
| fn read_upvar_capture(&mut self, dcx: &DecodeContext) -> ty::UpvarCapture { |
| self.read_enum("UpvarCapture", |this| { |
| let variants = ["ByValue", "ByRef"]; |
| this.read_enum_variant(&variants, |this, i| { |
| Ok(match i { |
| 1 => ty::UpvarCapture::ByValue, |
| 2 => ty::UpvarCapture::ByRef(ty::UpvarBorrow { |
| kind: this.read_enum_variant_arg(0, |
| |this| Decodable::decode(this)).unwrap(), |
| region: this.read_enum_variant_arg(1, |
| |this| Ok(this.read_region(dcx))).unwrap() |
| }), |
| _ => bug!("bad enum variant for ty::UpvarCapture") |
| }) |
| }) |
| }).unwrap() |
| } |
| fn read_auto_adjustment<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> adjustment::AutoAdjustment<'tcx> { |
| self.read_enum("AutoAdjustment", |this| { |
| let variants = ["AdjustReifyFnPointer", "AdjustUnsafeFnPointer", |
| "AdjustMutToConstPointer", "AdjustDerefRef"]; |
| this.read_enum_variant(&variants, |this, i| { |
| Ok(match i { |
| 1 => adjustment::AdjustReifyFnPointer, |
| 2 => adjustment::AdjustUnsafeFnPointer, |
| 3 => adjustment::AdjustMutToConstPointer, |
| 4 => { |
| let auto_deref_ref: adjustment::AutoDerefRef = |
| this.read_enum_variant_arg(0, |
| |this| Ok(this.read_auto_deref_ref(dcx))).unwrap(); |
| |
| adjustment::AdjustDerefRef(auto_deref_ref) |
| } |
| _ => bug!("bad enum variant for adjustment::AutoAdjustment") |
| }) |
| }) |
| }).unwrap() |
| } |
| |
| fn read_auto_deref_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> adjustment::AutoDerefRef<'tcx> { |
| self.read_struct("AutoDerefRef", 2, |this| { |
| Ok(adjustment::AutoDerefRef { |
| autoderefs: this.read_struct_field("autoderefs", 0, |this| { |
| Decodable::decode(this) |
| }).unwrap(), |
| autoref: this.read_struct_field("autoref", 1, |this| { |
| this.read_option(|this, b| { |
| if b { |
| Ok(Some(this.read_autoref(dcx))) |
| } else { |
| Ok(None) |
| } |
| }) |
| }).unwrap(), |
| unsize: this.read_struct_field("unsize", 2, |this| { |
| this.read_option(|this, b| { |
| if b { |
| Ok(Some(this.read_ty(dcx))) |
| } else { |
| Ok(None) |
| } |
| }) |
| }).unwrap(), |
| }) |
| }).unwrap() |
| } |
| |
| fn read_autoref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> adjustment::AutoRef<'tcx> { |
| self.read_enum("AutoRef", |this| { |
| let variants = ["AutoPtr", "AutoUnsafe"]; |
| this.read_enum_variant(&variants, |this, i| { |
| Ok(match i { |
| 0 => { |
| let r: ty::Region = |
| this.read_enum_variant_arg(0, |this| { |
| Ok(this.read_region(dcx)) |
| }).unwrap(); |
| let m: hir::Mutability = |
| this.read_enum_variant_arg(1, |this| { |
| Decodable::decode(this) |
| }).unwrap(); |
| |
| adjustment::AutoPtr(dcx.tcx.mk_region(r), m) |
| } |
| 1 => { |
| let m: hir::Mutability = |
| this.read_enum_variant_arg(0, |this| Decodable::decode(this)).unwrap(); |
| |
| adjustment::AutoUnsafe(m) |
| } |
| _ => bug!("bad enum variant for adjustment::AutoRef") |
| }) |
| }) |
| }).unwrap() |
| } |
| |
| fn read_cast_kind<'b, 'c>(&mut self, _dcx: &DecodeContext<'b, 'c, 'tcx>) |
| -> cast::CastKind |
| { |
| Decodable::decode(self).unwrap() |
| } |
| } |
| |
| // Converts a def-id that appears in a type. The correct |
| // translation will depend on what kind of def-id this is. |
| // This is a subtle point: type definitions are not |
| // inlined into the current crate, so if the def-id names |
| // a nominal type or type alias, then it should be |
| // translated to refer to the source crate. |
| // |
| // However, *type parameters* are cloned along with the function |
| // they are attached to. So we should translate those def-ids |
| // to refer to the new, cloned copy of the type parameter. |
| // We only see references to free type parameters in the body of |
| // an inlined function. In such cases, we need the def-id to |
| // be a local id so that the TypeContents code is able to lookup |
| // the relevant info in the ty_param_defs table. |
| // |
| // *Region parameters*, unfortunately, are another kettle of fish. |
| // In such cases, def_id's can appear in types to distinguish |
| // shadowed bound regions and so forth. It doesn't actually |
| // matter so much what we do to these, since regions are erased |
| // at trans time, but it's good to keep them consistent just in |
| // case. We translate them with `tr_def_id()` which will map |
| // the crate numbers back to the original source crate. |
| // |
| // Scopes will end up as being totally bogus. This can actually |
| // be fixed though. |
| // |
| // Unboxed closures are cloned along with the function being |
| // inlined, and all side tables use interned node IDs, so we |
| // translate their def IDs accordingly. |
| // |
| // It'd be really nice to refactor the type repr to not include |
| // def-ids so that all these distinctions were unnecessary. |
| fn convert_def_id(dcx: &DecodeContext, |
| did: DefId) |
| -> DefId { |
| let r = dcx.tr_def_id(did); |
| debug!("convert_def_id(did={:?})={:?}", did, r); |
| return r; |
| } |
| |
| fn decode_side_tables(dcx: &DecodeContext, |
| ast_doc: rbml::Doc) { |
| let tbl_doc = ast_doc.get(c::tag_table as usize); |
| for (tag, entry_doc) in reader::docs(tbl_doc) { |
| let mut entry_dsr = reader::Decoder::new(entry_doc); |
| let id0: ast::NodeId = Decodable::decode(&mut entry_dsr).unwrap(); |
| let id = dcx.tr_id(id0); |
| |
| debug!(">> Side table document with tag 0x{:x} \ |
| found for id {} (orig {})", |
| tag, id, id0); |
| let tag = tag as u32; |
| let decoded_tag: Option<c::astencode_tag> = c::astencode_tag::from_u32(tag); |
| match decoded_tag { |
| None => { |
| bug!("unknown tag found in side tables: {:x}", tag); |
| } |
| Some(value) => { |
| let val_dsr = &mut entry_dsr; |
| |
| match value { |
| c::tag_table_def => { |
| let def = decode_def(dcx, val_dsr); |
| dcx.tcx.def_map.borrow_mut().insert(id, def::PathResolution::new(def)); |
| } |
| c::tag_table_node_type => { |
| let ty = val_dsr.read_ty(dcx); |
| debug!("inserting ty for node {}: {:?}", |
| id, ty); |
| dcx.tcx.node_type_insert(id, ty); |
| } |
| c::tag_table_item_subst => { |
| let item_substs = ty::ItemSubsts { |
| substs: dcx.tcx.mk_substs(val_dsr.read_substs(dcx)) |
| }; |
| dcx.tcx.tables.borrow_mut().item_substs.insert( |
| id, item_substs); |
| } |
| c::tag_table_freevars => { |
| let fv_info = val_dsr.read_to_vec(|val_dsr| { |
| Ok(val_dsr.read_freevar_entry(dcx)) |
| }).unwrap().into_iter().collect(); |
| dcx.tcx.freevars.borrow_mut().insert(id, fv_info); |
| } |
| c::tag_table_upvar_capture_map => { |
| let var_id: ast::NodeId = Decodable::decode(val_dsr).unwrap(); |
| let upvar_id = ty::UpvarId { |
| var_id: dcx.tr_id(var_id), |
| closure_expr_id: id |
| }; |
| let ub = val_dsr.read_upvar_capture(dcx); |
| dcx.tcx.tables.borrow_mut().upvar_capture_map.insert(upvar_id, ub); |
| } |
| c::tag_table_method_map => { |
| let (autoderef, method) = val_dsr.read_method_callee(dcx); |
| let method_call = ty::MethodCall { |
| expr_id: id, |
| autoderef: autoderef |
| }; |
| dcx.tcx.tables.borrow_mut().method_map.insert(method_call, method); |
| } |
| c::tag_table_adjustments => { |
| let adj = |
| val_dsr.read_auto_adjustment(dcx); |
| dcx.tcx.tables.borrow_mut().adjustments.insert(id, adj); |
| } |
| c::tag_table_cast_kinds => { |
| let cast_kind = |
| val_dsr.read_cast_kind(dcx); |
| dcx.tcx.cast_kinds.borrow_mut().insert(id, cast_kind); |
| } |
| c::tag_table_const_qualif => { |
| let qualif: ConstQualif = Decodable::decode(val_dsr).unwrap(); |
| dcx.tcx.const_qualif_map.borrow_mut().insert(id, qualif); |
| } |
| _ => { |
| bug!("unknown tag found in side tables: {:x}", tag); |
| } |
| } |
| } |
| } |
| |
| debug!(">< Side table doc loaded"); |
| } |
| } |
| |
| // copy the tcache entries from the original item to the new |
| // inlined item |
| fn copy_item_types(dcx: &DecodeContext, ii: &InlinedItem, orig_did: DefId) { |
| fn copy_item_type(dcx: &DecodeContext, |
| inlined_id: ast::NodeId, |
| remote_did: DefId) { |
| let inlined_did = dcx.tcx.map.local_def_id(inlined_id); |
| dcx.tcx.register_item_type(inlined_did, |
| dcx.tcx.lookup_item_type(remote_did)); |
| |
| } |
| // copy the entry for the item itself |
| let item_node_id = match ii { |
| &InlinedItem::Item(ref i) => i.id, |
| &InlinedItem::TraitItem(_, ref ti) => ti.id, |
| &InlinedItem::ImplItem(_, ref ii) => ii.id, |
| &InlinedItem::Foreign(ref fi) => fi.id |
| }; |
| copy_item_type(dcx, item_node_id, orig_did); |
| |
| // copy the entries of inner items |
| if let &InlinedItem::Item(ref item) = ii { |
| match item.node { |
| hir::ItemEnum(ref def, _) => { |
| let orig_def = dcx.tcx.lookup_adt_def(orig_did); |
| for (i_variant, orig_variant) in |
| def.variants.iter().zip(orig_def.variants.iter()) |
| { |
| debug!("astencode: copying variant {:?} => {:?}", |
| orig_variant.did, i_variant.node.data.id()); |
| copy_item_type(dcx, i_variant.node.data.id(), orig_variant.did); |
| } |
| } |
| hir::ItemStruct(ref def, _) => { |
| if !def.is_struct() { |
| let ctor_did = dcx.tcx.lookup_adt_def(orig_did) |
| .struct_variant().did; |
| debug!("astencode: copying ctor {:?} => {:?}", ctor_did, |
| def.id()); |
| copy_item_type(dcx, def.id(), ctor_did); |
| } |
| } |
| _ => {} |
| } |
| } |
| } |
| |
| fn inlined_item_id_range(ii: &InlinedItem) -> IdRange { |
| let mut visitor = IdRangeComputingVisitor::new(); |
| ii.visit(&mut visitor); |
| visitor.result() |
| } |
| |
| // ______________________________________________________________________ |
| // Testing of astencode_gen |
| |
| #[cfg(test)] |
| fn encode_item_ast(rbml_w: &mut Encoder, item: &hir::Item) { |
| rbml_w.start_tag(c::tag_tree as usize); |
| (*item).encode(rbml_w); |
| rbml_w.end_tag(); |
| } |
| |
| #[cfg(test)] |
| fn decode_item_ast(item_doc: rbml::Doc) -> hir::Item { |
| let chi_doc = item_doc.get(c::tag_tree as usize); |
| let mut d = reader::Decoder::new(chi_doc); |
| Decodable::decode(&mut d).unwrap() |
| } |
| |
| #[cfg(test)] |
| trait FakeExtCtxt { |
| fn call_site(&self) -> syntax_pos::Span; |
| fn cfg(&self) -> ast::CrateConfig; |
| fn ident_of(&self, st: &str) -> ast::Ident; |
| fn name_of(&self, st: &str) -> ast::Name; |
| fn parse_sess(&self) -> &parse::ParseSess; |
| } |
| |
| #[cfg(test)] |
| impl FakeExtCtxt for parse::ParseSess { |
| fn call_site(&self) -> syntax_pos::Span { |
| syntax_pos::Span { |
| lo: syntax_pos::BytePos(0), |
| hi: syntax_pos::BytePos(0), |
| expn_id: syntax_pos::NO_EXPANSION, |
| } |
| } |
| fn cfg(&self) -> ast::CrateConfig { Vec::new() } |
| fn ident_of(&self, st: &str) -> ast::Ident { |
| parse::token::str_to_ident(st) |
| } |
| fn name_of(&self, st: &str) -> ast::Name { |
| parse::token::intern(st) |
| } |
| fn parse_sess(&self) -> &parse::ParseSess { self } |
| } |
| |
| #[cfg(test)] |
| fn mk_ctxt() -> parse::ParseSess { |
| parse::ParseSess::new() |
| } |
| |
| #[cfg(test)] |
| fn with_testing_context<T, F: FnOnce(&mut LoweringContext) -> T>(f: F) -> T { |
| let mut resolver = DummyResolver; |
| let mut lcx = LoweringContext::testing_context(&mut resolver); |
| f(&mut lcx) |
| } |
| |
| #[cfg(test)] |
| fn roundtrip(in_item: hir::Item) { |
| let mut wr = Cursor::new(Vec::new()); |
| encode_item_ast(&mut Encoder::new(&mut wr), &in_item); |
| let rbml_doc = rbml::Doc::new(wr.get_ref()); |
| let out_item = decode_item_ast(rbml_doc); |
| |
| assert!(in_item == out_item); |
| } |
| |
| #[test] |
| fn test_basic() { |
| let cx = mk_ctxt(); |
| with_testing_context(|lcx| { |
| roundtrip(lcx.lower_item("e_item!(&cx, |
| fn foo() {} |
| ).unwrap())); |
| }); |
| } |
| |
| #[test] |
| fn test_smalltalk() { |
| let cx = mk_ctxt(); |
| with_testing_context(|lcx| { |
| roundtrip(lcx.lower_item("e_item!(&cx, |
| fn foo() -> isize { 3 + 4 } // first smalltalk program ever executed. |
| ).unwrap())); |
| }); |
| } |
| |
| #[test] |
| fn test_more() { |
| let cx = mk_ctxt(); |
| with_testing_context(|lcx| { |
| roundtrip(lcx.lower_item("e_item!(&cx, |
| fn foo(x: usize, y: usize) -> usize { |
| let z = x + y; |
| return z; |
| } |
| ).unwrap())); |
| }); |
| } |
| |
| #[test] |
| fn test_simplification() { |
| let cx = mk_ctxt(); |
| let item = quote_item!(&cx, |
| fn new_int_alist<B>() -> alist<isize, B> { |
| fn eq_int(a: isize, b: isize) -> bool { a == b } |
| return alist {eq_fn: eq_int, data: Vec::new()}; |
| } |
| ).unwrap(); |
| let cx = mk_ctxt(); |
| with_testing_context(|lcx| { |
| let hir_item = lcx.lower_item(&item); |
| let item_in = InlinedItemRef::Item(&hir_item); |
| let (item_out, _) = simplify_ast(item_in); |
| let item_exp = InlinedItem::Item(P(lcx.lower_item("e_item!(&cx, |
| fn new_int_alist<B>() -> alist<isize, B> { |
| return alist {eq_fn: eq_int, data: Vec::new()}; |
| } |
| ).unwrap()))); |
| match (item_out, item_exp) { |
| (InlinedItem::Item(item_out), InlinedItem::Item(item_exp)) => { |
| assert!(pprust::item_to_string(&item_out) == |
| pprust::item_to_string(&item_exp)); |
| } |
| _ => bug!() |
| } |
| }); |
| } |
