1 // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![allow(non_camel_case_types)]
12 // FIXME: remove this after snapshot, and Results are handled
13 #![allow(unused_must_use)]
15 use rustc::front::map as ast_map;
16 use rustc::session::Session;
19 use rustc_front::fold;
20 use rustc_front::fold::Folder;
29 use middle::cstore::{InlinedItem, InlinedItemRef};
30 use middle::ty::adjustment;
32 use middle::const_qualif::ConstQualif;
33 use middle::def::{self, Def};
34 use middle::def_id::DefId;
35 use middle::privacy::{AllPublic, LastMod};
38 use middle::ty::{self, Ty};
40 use syntax::{ast, ast_util, codemap};
41 use syntax::ast::NodeIdAssigner;
45 use std::io::SeekFrom;
46 use std::io::prelude::*;
50 use rbml::writer::Encoder;
53 use serialize::{Decodable, Decoder, DecoderHelpers, Encodable};
54 use serialize::EncoderHelpers;
56 #[cfg(test)] use std::io::Cursor;
57 #[cfg(test)] use syntax::parse;
58 #[cfg(test)] use syntax::ast::NodeId;
59 #[cfg(test)] use rustc_front::print::pprust;
60 #[cfg(test)] use rustc_front::lowering::{lower_item, LoweringContext};
62 struct DecodeContext<'a, 'b, 'tcx: 'a> {
63 tcx: &'a ty::ctxt<'tcx>,
64 cdata: &'b cstore::crate_metadata,
65 from_id_range: ast_util::IdRange,
66 to_id_range: ast_util::IdRange,
67 // Cache the last used filemap for translating spans as an optimization.
68 last_filemap_index: Cell<usize>,
72 fn tr(&self, dcx: &DecodeContext) -> Self;
75 // ______________________________________________________________________
78 pub fn encode_inlined_item(ecx: &e::EncodeContext,
82 InlinedItemRef::Item(i) => i.id,
83 InlinedItemRef::Foreign(i) => i.id,
84 InlinedItemRef::TraitItem(_, ti) => ti.id,
85 InlinedItemRef::ImplItem(_, ii) => ii.id,
87 debug!("> Encoding inlined item: {} ({:?})",
88 ecx.tcx.map.path_to_string(id),
89 rbml_w.writer.seek(SeekFrom::Current(0)));
91 // Folding could be avoided with a smarter encoder.
92 let ii = simplify_ast(ii);
93 let id_range = inlined_item_id_range(&ii);
95 rbml_w.start_tag(c::tag_ast as usize);
96 id_range.encode(rbml_w);
97 encode_ast(rbml_w, &ii);
98 encode_side_tables_for_ii(ecx, rbml_w, &ii);
101 debug!("< Encoded inlined fn: {} ({:?})",
102 ecx.tcx.map.path_to_string(id),
103 rbml_w.writer.seek(SeekFrom::Current(0)));
106 impl<'a, 'b, 'c, 'tcx> ast_map::FoldOps for &'a DecodeContext<'b, 'c, 'tcx> {
107 fn new_id(&self, id: ast::NodeId) -> ast::NodeId {
108 if id == ast::DUMMY_NODE_ID {
109 // Used by ast_map to map the NodeInlinedParent.
110 self.tcx.sess.next_node_id()
115 fn new_def_id(&self, def_id: DefId) -> DefId {
116 self.tr_def_id(def_id)
118 fn new_span(&self, span: codemap::Span) -> codemap::Span {
123 /// Decodes an item from its AST in the cdata's metadata and adds it to the
125 pub fn decode_inlined_item<'tcx>(cdata: &cstore::crate_metadata,
126 tcx: &ty::ctxt<'tcx>,
127 parent_path: Vec<ast_map::PathElem>,
128 parent_def_path: ast_map::DefPath,
131 -> Result<&'tcx InlinedItem, (Vec<ast_map::PathElem>,
133 match par_doc.opt_child(c::tag_ast) {
134 None => Err((parent_path, parent_def_path)),
136 let mut path_as_str = None;
137 debug!("> Decoding inlined fn: {:?}::?",
139 // Do an Option dance to use the path after it is moved below.
140 let s = ast_map::path_to_string(parent_path.iter().cloned());
141 path_as_str = Some(s);
142 path_as_str.as_ref().map(|x| &x[..])
144 let mut ast_dsr = reader::Decoder::new(ast_doc);
145 let from_id_range = Decodable::decode(&mut ast_dsr).unwrap();
146 let to_id_range = reserve_id_range(&tcx.sess, from_id_range);
147 let dcx = &DecodeContext {
150 from_id_range: from_id_range,
151 to_id_range: to_id_range,
152 last_filemap_index: Cell::new(0)
154 let raw_ii = decode_ast(ast_doc);
155 let ii = ast_map::map_decoded_item(&dcx.tcx.map,
160 let name = match *ii {
161 InlinedItem::Item(ref i) => i.name,
162 InlinedItem::Foreign(ref i) => i.name,
163 InlinedItem::TraitItem(_, ref ti) => ti.name,
164 InlinedItem::ImplItem(_, ref ii) => ii.name
166 debug!("Fn named: {}", name);
167 debug!("< Decoded inlined fn: {}::{}",
168 path_as_str.unwrap(),
170 region::resolve_inlined_item(&tcx.sess, &tcx.region_maps, ii);
171 decode_side_tables(dcx, ast_doc);
172 copy_item_types(dcx, ii, orig_did);
174 InlinedItem::Item(ref i) => {
175 debug!(">>> DECODED ITEM >>>\n{}\n<<< DECODED ITEM <<<",
176 ::rustc_front::print::pprust::item_to_string(&i));
186 // ______________________________________________________________________
187 // Enumerating the IDs which appear in an AST
189 fn reserve_id_range(sess: &Session,
190 from_id_range: ast_util::IdRange) -> ast_util::IdRange {
191 // Handle the case of an empty range:
192 if from_id_range.empty() { return from_id_range; }
193 let cnt = from_id_range.max - from_id_range.min;
194 let to_id_min = sess.reserve_node_ids(cnt);
195 let to_id_max = to_id_min + cnt;
196 ast_util::IdRange { min: to_id_min, max: to_id_max }
199 impl<'a, 'b, 'tcx> DecodeContext<'a, 'b, 'tcx> {
200 /// Translates an internal id, meaning a node id that is known to refer to some part of the
201 /// item currently being inlined, such as a local variable or argument. All naked node-ids
202 /// that appear in types have this property, since if something might refer to an external item
203 /// we would use a def-id to allow for the possibility that the item resides in another crate.
204 pub fn tr_id(&self, id: ast::NodeId) -> ast::NodeId {
205 // from_id_range should be non-empty
206 assert!(!self.from_id_range.empty());
207 // Use wrapping arithmetic because otherwise it introduces control flow.
208 // Maybe we should just have the control flow? -- aatch
209 (id.wrapping_sub(self.from_id_range.min).wrapping_add(self.to_id_range.min))
212 /// Translates an EXTERNAL def-id, converting the crate number from the one used in the encoded
213 /// data to the current crate numbers.. By external, I mean that it be translated to a
214 /// reference to the item in its original crate, as opposed to being translated to a reference
215 /// to the inlined version of the item. This is typically, but not always, what you want,
216 /// because most def-ids refer to external things like types or other fns that may or may not
217 /// be inlined. Note that even when the inlined function is referencing itself recursively, we
218 /// would want `tr_def_id` for that reference--- conceptually the function calls the original,
219 /// non-inlined version, and trans deals with linking that recursive call to the inlined copy.
220 pub fn tr_def_id(&self, did: DefId) -> DefId {
221 decoder::translate_def_id(self.cdata, did)
224 /// Translates a `Span` from an extern crate to the corresponding `Span`
225 /// within the local crate's codemap.
226 pub fn tr_span(&self, span: codemap::Span) -> codemap::Span {
227 decoder::translate_span(self.cdata,
228 self.tcx.sess.codemap(),
229 &self.last_filemap_index,
235 fn tr(&self, dcx: &DecodeContext) -> DefId {
240 impl tr for Option<DefId> {
241 fn tr(&self, dcx: &DecodeContext) -> Option<DefId> {
242 self.map(|d| dcx.tr_def_id(d))
246 impl tr for codemap::Span {
247 fn tr(&self, dcx: &DecodeContext) -> codemap::Span {
252 trait def_id_encoder_helpers {
253 fn emit_def_id(&mut self, did: DefId);
256 impl<S:serialize::Encoder> def_id_encoder_helpers for S
257 where <S as serialize::serialize::Encoder>::Error: Debug
259 fn emit_def_id(&mut self, did: DefId) {
260 did.encode(self).unwrap()
264 trait def_id_decoder_helpers {
265 fn read_def_id(&mut self, dcx: &DecodeContext) -> DefId;
266 fn read_def_id_nodcx(&mut self,
267 cdata: &cstore::crate_metadata) -> DefId;
270 impl<D:serialize::Decoder> def_id_decoder_helpers for D
271 where <D as serialize::serialize::Decoder>::Error: Debug
273 fn read_def_id(&mut self, dcx: &DecodeContext) -> DefId {
274 let did: DefId = Decodable::decode(self).unwrap();
278 fn read_def_id_nodcx(&mut self,
279 cdata: &cstore::crate_metadata)
281 let did: DefId = Decodable::decode(self).unwrap();
282 decoder::translate_def_id(cdata, did)
286 // ______________________________________________________________________
287 // Encoding and decoding the AST itself
289 // When decoding, we have to renumber the AST so that the node ids that
290 // appear within are disjoint from the node ids in our existing ASTs.
291 // We also have to adjust the spans: for now we just insert a dummy span,
292 // but eventually we should add entries to the local codemap as required.
294 fn encode_ast(rbml_w: &mut Encoder, item: &InlinedItem) {
295 rbml_w.start_tag(c::tag_tree as usize);
296 rbml_w.emit_opaque(|this| item.encode(this));
300 struct NestedItemsDropper;
302 impl Folder for NestedItemsDropper {
303 fn fold_block(&mut self, blk: P<hir::Block>) -> P<hir::Block> {
304 blk.and_then(|hir::Block {id, stmts, expr, rules, span, ..}| {
305 let stmts_sans_items = stmts.into_iter().filter_map(|stmt| {
306 let use_stmt = match stmt.node {
307 hir::StmtExpr(_, _) | hir::StmtSemi(_, _) => true,
308 hir::StmtDecl(ref decl, _) => {
310 hir::DeclLocal(_) => true,
311 hir::DeclItem(_) => false,
321 let blk_sans_items = P(hir::Block {
322 stmts: stmts_sans_items,
328 fold::noop_fold_block(blk_sans_items, self)
333 // Produces a simplified copy of the AST which does not include things
334 // that we do not need to or do not want to export. For example, we
335 // do not include any nested items: if these nested items are to be
336 // inlined, their AST will be exported separately (this only makes
337 // sense because, in Rust, nested items are independent except for
338 // their visibility).
340 // As it happens, trans relies on the fact that we do not export
341 // nested items, as otherwise it would get confused when translating
343 fn simplify_ast(ii: InlinedItemRef) -> InlinedItem {
344 let mut fld = NestedItemsDropper;
347 // HACK we're not dropping items.
348 InlinedItemRef::Item(i) => {
349 InlinedItem::Item(P(fold::noop_fold_item(i.clone(), &mut fld)))
351 InlinedItemRef::TraitItem(d, ti) => {
352 InlinedItem::TraitItem(d, P(fold::noop_fold_trait_item(ti.clone(), &mut fld)))
354 InlinedItemRef::ImplItem(d, ii) => {
355 InlinedItem::ImplItem(d, P(fold::noop_fold_impl_item(ii.clone(), &mut fld)))
357 InlinedItemRef::Foreign(i) => {
358 InlinedItem::Foreign(P(fold::noop_fold_foreign_item(i.clone(), &mut fld)))
363 fn decode_ast(par_doc: rbml::Doc) -> InlinedItem {
364 let chi_doc = par_doc.get(c::tag_tree as usize);
365 let mut rbml_r = reader::Decoder::new(chi_doc);
366 rbml_r.read_opaque(|decoder, _| Decodable::decode(decoder)).unwrap()
369 // ______________________________________________________________________
370 // Encoding and decoding of ast::def
372 fn decode_def(dcx: &DecodeContext, dsr: &mut reader::Decoder) -> Def {
373 let def: Def = Decodable::decode(dsr).unwrap();
378 fn tr(&self, dcx: &DecodeContext) -> Def {
380 Def::Fn(did) => Def::Fn(did.tr(dcx)),
381 Def::Method(did) => Def::Method(did.tr(dcx)),
382 Def::SelfTy(opt_did, impl_ids) => { Def::SelfTy(opt_did.map(|did| did.tr(dcx)),
383 impl_ids.map(|(nid1, nid2)| {
387 Def::Mod(did) => { Def::Mod(did.tr(dcx)) }
388 Def::ForeignMod(did) => { Def::ForeignMod(did.tr(dcx)) }
389 Def::Static(did, m) => { Def::Static(did.tr(dcx), m) }
390 Def::Const(did) => { Def::Const(did.tr(dcx)) }
391 Def::AssociatedConst(did) => Def::AssociatedConst(did.tr(dcx)),
392 Def::Local(_, nid) => {
393 let nid = dcx.tr_id(nid);
394 let did = dcx.tcx.map.local_def_id(nid);
397 Def::Variant(e_did, v_did) => Def::Variant(e_did.tr(dcx), v_did.tr(dcx)),
398 Def::Trait(did) => Def::Trait(did.tr(dcx)),
399 Def::Enum(did) => Def::Enum(did.tr(dcx)),
400 Def::TyAlias(did) => Def::TyAlias(did.tr(dcx)),
401 Def::AssociatedTy(trait_did, did) =>
402 Def::AssociatedTy(trait_did.tr(dcx), did.tr(dcx)),
403 Def::PrimTy(p) => Def::PrimTy(p),
404 Def::TyParam(s, index, def_id, n) => Def::TyParam(s, index, def_id.tr(dcx), n),
405 Def::Upvar(_, nid1, index, nid2) => {
406 let nid1 = dcx.tr_id(nid1);
407 let nid2 = dcx.tr_id(nid2);
408 let did1 = dcx.tcx.map.local_def_id(nid1);
409 Def::Upvar(did1, nid1, index, nid2)
411 Def::Struct(did) => Def::Struct(did.tr(dcx)),
412 Def::Label(nid) => Def::Label(dcx.tr_id(nid)),
413 Def::Err => Def::Err,
418 // ______________________________________________________________________
419 // Encoding and decoding of freevar information
421 fn encode_freevar_entry(rbml_w: &mut Encoder, fv: &ty::Freevar) {
422 (*fv).encode(rbml_w).unwrap();
425 trait rbml_decoder_helper {
426 fn read_freevar_entry(&mut self, dcx: &DecodeContext)
428 fn read_capture_mode(&mut self) -> hir::CaptureClause;
431 impl<'a> rbml_decoder_helper for reader::Decoder<'a> {
432 fn read_freevar_entry(&mut self, dcx: &DecodeContext)
434 let fv: ty::Freevar = Decodable::decode(self).unwrap();
438 fn read_capture_mode(&mut self) -> hir::CaptureClause {
439 let cm: hir::CaptureClause = Decodable::decode(self).unwrap();
444 impl tr for ty::Freevar {
445 fn tr(&self, dcx: &DecodeContext) -> ty::Freevar {
447 def: self.def.tr(dcx),
448 span: self.span.tr(dcx),
453 // ______________________________________________________________________
454 // Encoding and decoding of MethodCallee
456 trait read_method_callee_helper<'tcx> {
457 fn read_method_callee<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
458 -> (u32, ty::MethodCallee<'tcx>);
461 fn encode_method_callee<'a, 'tcx>(ecx: &e::EncodeContext<'a, 'tcx>,
462 rbml_w: &mut Encoder,
464 method: &ty::MethodCallee<'tcx>) {
465 use serialize::Encoder;
467 rbml_w.emit_struct("MethodCallee", 4, |rbml_w| {
468 rbml_w.emit_struct_field("autoderef", 0, |rbml_w| {
469 autoderef.encode(rbml_w)
471 rbml_w.emit_struct_field("def_id", 1, |rbml_w| {
472 Ok(rbml_w.emit_def_id(method.def_id))
474 rbml_w.emit_struct_field("ty", 2, |rbml_w| {
475 Ok(rbml_w.emit_ty(ecx, method.ty))
477 rbml_w.emit_struct_field("substs", 3, |rbml_w| {
478 Ok(rbml_w.emit_substs(ecx, &method.substs))
483 impl<'a, 'tcx> read_method_callee_helper<'tcx> for reader::Decoder<'a> {
484 fn read_method_callee<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
485 -> (u32, ty::MethodCallee<'tcx>) {
487 self.read_struct("MethodCallee", 4, |this| {
488 let autoderef = this.read_struct_field("autoderef", 0,
489 Decodable::decode).unwrap();
490 Ok((autoderef, ty::MethodCallee {
491 def_id: this.read_struct_field("def_id", 1, |this| {
492 Ok(this.read_def_id(dcx))
494 ty: this.read_struct_field("ty", 2, |this| {
495 Ok(this.read_ty(dcx))
497 substs: this.read_struct_field("substs", 3, |this| {
498 Ok(dcx.tcx.mk_substs(this.read_substs(dcx)))
505 pub fn encode_cast_kind(ebml_w: &mut Encoder, kind: cast::CastKind) {
506 kind.encode(ebml_w).unwrap();
509 // ______________________________________________________________________
510 // Encoding and decoding the side tables
512 trait rbml_writer_helpers<'tcx> {
513 fn emit_region(&mut self, ecx: &e::EncodeContext, r: ty::Region);
514 fn emit_ty<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, ty: Ty<'tcx>);
515 fn emit_tys<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, tys: &[Ty<'tcx>]);
516 fn emit_predicate<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
517 predicate: &ty::Predicate<'tcx>);
518 fn emit_trait_ref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
519 ty: &ty::TraitRef<'tcx>);
520 fn emit_substs<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
521 substs: &subst::Substs<'tcx>);
522 fn emit_existential_bounds<'b>(&mut self, ecx: &e::EncodeContext<'b,'tcx>,
523 bounds: &ty::ExistentialBounds<'tcx>);
524 fn emit_builtin_bounds(&mut self, ecx: &e::EncodeContext, bounds: &ty::BuiltinBounds);
525 fn emit_upvar_capture(&mut self, ecx: &e::EncodeContext, capture: &ty::UpvarCapture);
526 fn emit_auto_adjustment<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
527 adj: &adjustment::AutoAdjustment<'tcx>);
528 fn emit_autoref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
529 autoref: &adjustment::AutoRef<'tcx>);
530 fn emit_auto_deref_ref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
531 auto_deref_ref: &adjustment::AutoDerefRef<'tcx>);
534 impl<'a, 'tcx> rbml_writer_helpers<'tcx> for Encoder<'a> {
535 fn emit_region(&mut self, ecx: &e::EncodeContext, r: ty::Region) {
536 self.emit_opaque(|this| Ok(tyencode::enc_region(&mut this.cursor,
541 fn emit_ty<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, ty: Ty<'tcx>) {
542 self.emit_opaque(|this| Ok(tyencode::enc_ty(&mut this.cursor,
547 fn emit_tys<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, tys: &[Ty<'tcx>]) {
548 self.emit_from_vec(tys, |this, ty| Ok(this.emit_ty(ecx, *ty)));
551 fn emit_trait_ref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
552 trait_ref: &ty::TraitRef<'tcx>) {
553 self.emit_opaque(|this| Ok(tyencode::enc_trait_ref(&mut this.cursor,
558 fn emit_predicate<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
559 predicate: &ty::Predicate<'tcx>) {
560 self.emit_opaque(|this| {
561 Ok(tyencode::enc_predicate(&mut this.cursor,
567 fn emit_existential_bounds<'b>(&mut self, ecx: &e::EncodeContext<'b,'tcx>,
568 bounds: &ty::ExistentialBounds<'tcx>) {
569 self.emit_opaque(|this| Ok(tyencode::enc_existential_bounds(&mut this.cursor,
574 fn emit_builtin_bounds(&mut self, ecx: &e::EncodeContext, bounds: &ty::BuiltinBounds) {
575 self.emit_opaque(|this| Ok(tyencode::enc_builtin_bounds(&mut this.cursor,
580 fn emit_upvar_capture(&mut self, ecx: &e::EncodeContext, capture: &ty::UpvarCapture) {
581 use serialize::Encoder;
583 self.emit_enum("UpvarCapture", |this| {
585 ty::UpvarCapture::ByValue => {
586 this.emit_enum_variant("ByValue", 1, 0, |_| Ok(()))
588 ty::UpvarCapture::ByRef(ty::UpvarBorrow { kind, region }) => {
589 this.emit_enum_variant("ByRef", 2, 0, |this| {
590 this.emit_enum_variant_arg(0,
591 |this| kind.encode(this));
592 this.emit_enum_variant_arg(1,
593 |this| Ok(this.emit_region(ecx, region)))
600 fn emit_substs<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
601 substs: &subst::Substs<'tcx>) {
602 self.emit_opaque(|this| Ok(tyencode::enc_substs(&mut this.cursor,
607 fn emit_auto_adjustment<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
608 adj: &adjustment::AutoAdjustment<'tcx>) {
609 use serialize::Encoder;
611 self.emit_enum("AutoAdjustment", |this| {
613 adjustment::AdjustReifyFnPointer=> {
614 this.emit_enum_variant("AdjustReifyFnPointer", 1, 0, |_| Ok(()))
617 adjustment::AdjustUnsafeFnPointer => {
618 this.emit_enum_variant("AdjustUnsafeFnPointer", 2, 0, |_| {
623 adjustment::AdjustDerefRef(ref auto_deref_ref) => {
624 this.emit_enum_variant("AdjustDerefRef", 3, 2, |this| {
625 this.emit_enum_variant_arg(0,
626 |this| Ok(this.emit_auto_deref_ref(ecx, auto_deref_ref)))
633 fn emit_autoref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
634 autoref: &adjustment::AutoRef<'tcx>) {
635 use serialize::Encoder;
637 self.emit_enum("AutoRef", |this| {
639 &adjustment::AutoPtr(r, m) => {
640 this.emit_enum_variant("AutoPtr", 0, 2, |this| {
641 this.emit_enum_variant_arg(0,
642 |this| Ok(this.emit_region(ecx, *r)));
643 this.emit_enum_variant_arg(1, |this| m.encode(this))
646 &adjustment::AutoUnsafe(m) => {
647 this.emit_enum_variant("AutoUnsafe", 1, 1, |this| {
648 this.emit_enum_variant_arg(0, |this| m.encode(this))
655 fn emit_auto_deref_ref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
656 auto_deref_ref: &adjustment::AutoDerefRef<'tcx>) {
657 use serialize::Encoder;
659 self.emit_struct("AutoDerefRef", 2, |this| {
660 this.emit_struct_field("autoderefs", 0, |this| auto_deref_ref.autoderefs.encode(this));
662 this.emit_struct_field("autoref", 1, |this| {
663 this.emit_option(|this| {
664 match auto_deref_ref.autoref {
665 None => this.emit_option_none(),
666 Some(ref a) => this.emit_option_some(|this| Ok(this.emit_autoref(ecx, a))),
671 this.emit_struct_field("unsize", 2, |this| {
672 this.emit_option(|this| {
673 match auto_deref_ref.unsize {
674 None => this.emit_option_none(),
675 Some(target) => this.emit_option_some(|this| {
676 Ok(this.emit_ty(ecx, target))
685 trait write_tag_and_id {
686 fn tag<F>(&mut self, tag_id: c::astencode_tag, f: F) where F: FnOnce(&mut Self);
687 fn id(&mut self, id: ast::NodeId);
690 impl<'a> write_tag_and_id for Encoder<'a> {
692 tag_id: c::astencode_tag,
694 F: FnOnce(&mut Encoder<'a>),
696 self.start_tag(tag_id as usize);
701 fn id(&mut self, id: ast::NodeId) {
702 id.encode(self).unwrap();
706 struct SideTableEncodingIdVisitor<'a, 'b:'a, 'c:'a, 'tcx:'c> {
707 ecx: &'a e::EncodeContext<'c, 'tcx>,
708 rbml_w: &'a mut Encoder<'b>,
711 impl<'a, 'b, 'c, 'tcx> ast_util::IdVisitingOperation for
712 SideTableEncodingIdVisitor<'a, 'b, 'c, 'tcx> {
713 fn visit_id(&mut self, id: ast::NodeId) {
714 encode_side_tables_for_id(self.ecx, self.rbml_w, id)
718 fn encode_side_tables_for_ii(ecx: &e::EncodeContext,
719 rbml_w: &mut Encoder,
721 rbml_w.start_tag(c::tag_table as usize);
722 ii.visit_ids(&mut SideTableEncodingIdVisitor {
729 fn encode_side_tables_for_id(ecx: &e::EncodeContext,
730 rbml_w: &mut Encoder,
734 debug!("Encoding side tables for id {}", id);
736 if let Some(def) = tcx.def_map.borrow().get(&id).map(|d| d.full_def()) {
737 rbml_w.tag(c::tag_table_def, |rbml_w| {
739 def.encode(rbml_w).unwrap();
743 if let Some(ty) = tcx.node_types().get(&id) {
744 rbml_w.tag(c::tag_table_node_type, |rbml_w| {
746 rbml_w.emit_ty(ecx, *ty);
750 if let Some(item_substs) = tcx.tables.borrow().item_substs.get(&id) {
751 rbml_w.tag(c::tag_table_item_subst, |rbml_w| {
753 rbml_w.emit_substs(ecx, &item_substs.substs);
757 if let Some(fv) = tcx.freevars.borrow().get(&id) {
758 rbml_w.tag(c::tag_table_freevars, |rbml_w| {
760 rbml_w.emit_from_vec(fv, |rbml_w, fv_entry| {
761 Ok(encode_freevar_entry(rbml_w, fv_entry))
766 rbml_w.tag(c::tag_table_upvar_capture_map, |rbml_w| {
769 let var_id = freevar.def.var_id();
770 let upvar_id = ty::UpvarId {
774 let upvar_capture = tcx.tables
780 var_id.encode(rbml_w);
781 rbml_w.emit_upvar_capture(ecx, &upvar_capture);
786 let method_call = ty::MethodCall::expr(id);
787 if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) {
788 rbml_w.tag(c::tag_table_method_map, |rbml_w| {
790 encode_method_callee(ecx, rbml_w, method_call.autoderef, method)
794 if let Some(adjustment) = tcx.tables.borrow().adjustments.get(&id) {
796 adjustment::AdjustDerefRef(ref adj) => {
797 for autoderef in 0..adj.autoderefs {
798 let method_call = ty::MethodCall::autoderef(id, autoderef as u32);
799 if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) {
800 rbml_w.tag(c::tag_table_method_map, |rbml_w| {
802 encode_method_callee(ecx, rbml_w,
803 method_call.autoderef, method)
811 rbml_w.tag(c::tag_table_adjustments, |rbml_w| {
813 rbml_w.emit_auto_adjustment(ecx, adjustment);
817 if let Some(cast_kind) = tcx.cast_kinds.borrow().get(&id) {
818 rbml_w.tag(c::tag_table_cast_kinds, |rbml_w| {
820 encode_cast_kind(rbml_w, *cast_kind)
824 if let Some(qualif) = tcx.const_qualif_map.borrow().get(&id) {
825 rbml_w.tag(c::tag_table_const_qualif, |rbml_w| {
827 qualif.encode(rbml_w).unwrap()
832 trait doc_decoder_helpers: Sized {
833 fn as_int(&self) -> isize;
834 fn opt_child(&self, tag: c::astencode_tag) -> Option<Self>;
837 impl<'a> doc_decoder_helpers for rbml::Doc<'a> {
838 fn as_int(&self) -> isize { reader::doc_as_u64(*self) as isize }
839 fn opt_child(&self, tag: c::astencode_tag) -> Option<rbml::Doc<'a>> {
840 reader::maybe_get_doc(*self, tag as usize)
844 trait rbml_decoder_decoder_helpers<'tcx> {
845 fn read_ty_encoded<'a, 'b, F, R>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>,
847 where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x, 'tcx>) -> R;
849 fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region;
850 fn read_ty<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Ty<'tcx>;
851 fn read_tys<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Vec<Ty<'tcx>>;
852 fn read_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
853 -> ty::TraitRef<'tcx>;
854 fn read_poly_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
855 -> ty::PolyTraitRef<'tcx>;
856 fn read_predicate<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
857 -> ty::Predicate<'tcx>;
858 fn read_existential_bounds<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
859 -> ty::ExistentialBounds<'tcx>;
860 fn read_substs<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
861 -> subst::Substs<'tcx>;
862 fn read_upvar_capture(&mut self, dcx: &DecodeContext)
864 fn read_auto_adjustment<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
865 -> adjustment::AutoAdjustment<'tcx>;
866 fn read_cast_kind<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
868 fn read_auto_deref_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
869 -> adjustment::AutoDerefRef<'tcx>;
870 fn read_autoref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
871 -> adjustment::AutoRef<'tcx>;
873 // Versions of the type reading functions that don't need the full
875 fn read_ty_nodcx(&mut self,
876 tcx: &ty::ctxt<'tcx>, cdata: &cstore::crate_metadata) -> Ty<'tcx>;
877 fn read_tys_nodcx(&mut self,
878 tcx: &ty::ctxt<'tcx>,
879 cdata: &cstore::crate_metadata) -> Vec<Ty<'tcx>>;
880 fn read_substs_nodcx(&mut self, tcx: &ty::ctxt<'tcx>,
881 cdata: &cstore::crate_metadata)
882 -> subst::Substs<'tcx>;
885 impl<'a, 'tcx> rbml_decoder_decoder_helpers<'tcx> for reader::Decoder<'a> {
886 fn read_ty_nodcx(&mut self,
887 tcx: &ty::ctxt<'tcx>,
888 cdata: &cstore::crate_metadata)
890 self.read_opaque(|_, doc| {
892 tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc,
893 &mut |id| decoder::translate_def_id(cdata, id))
898 fn read_tys_nodcx(&mut self,
899 tcx: &ty::ctxt<'tcx>,
900 cdata: &cstore::crate_metadata) -> Vec<Ty<'tcx>> {
901 self.read_to_vec(|this| Ok(this.read_ty_nodcx(tcx, cdata)) )
907 fn read_substs_nodcx(&mut self,
908 tcx: &ty::ctxt<'tcx>,
909 cdata: &cstore::crate_metadata)
910 -> subst::Substs<'tcx>
912 self.read_opaque(|_, doc| {
914 tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc,
915 &mut |id| decoder::translate_def_id(cdata, id))
920 fn read_ty_encoded<'b, 'c, F, R>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>, op: F) -> R
921 where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x,'tcx>) -> R
923 return self.read_opaque(|_, doc| {
924 debug!("read_ty_encoded({})", type_string(doc));
926 &mut tydecode::TyDecoder::with_doc(
927 dcx.tcx, dcx.cdata.cnum, doc,
928 &mut |d| convert_def_id(dcx, d))))
931 fn type_string(doc: rbml::Doc) -> String {
932 let mut str = String::new();
933 for i in doc.start..doc.end {
934 str.push(doc.data[i] as char);
939 fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region {
940 // Note: regions types embed local node ids. In principle, we
941 // should translate these node ids into the new decode
942 // context. However, we do not bother, because region types
943 // are not used during trans. This also applies to read_ty.
944 return self.read_ty_encoded(dcx, |decoder| decoder.parse_region());
946 fn read_ty<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) -> Ty<'tcx> {
947 return self.read_ty_encoded(dcx, |decoder| decoder.parse_ty());
950 fn read_tys<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
952 self.read_to_vec(|this| Ok(this.read_ty(dcx))).unwrap().into_iter().collect()
955 fn read_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
956 -> ty::TraitRef<'tcx> {
957 self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref())
960 fn read_poly_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
961 -> ty::PolyTraitRef<'tcx> {
962 ty::Binder(self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref()))
965 fn read_predicate<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
966 -> ty::Predicate<'tcx>
968 self.read_ty_encoded(dcx, |decoder| decoder.parse_predicate())
971 fn read_existential_bounds<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
972 -> ty::ExistentialBounds<'tcx>
974 self.read_ty_encoded(dcx, |decoder| decoder.parse_existential_bounds())
977 fn read_substs<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
978 -> subst::Substs<'tcx> {
979 self.read_opaque(|_, doc| {
980 Ok(tydecode::TyDecoder::with_doc(dcx.tcx, dcx.cdata.cnum, doc,
981 &mut |d| convert_def_id(dcx, d))
985 fn read_upvar_capture(&mut self, dcx: &DecodeContext) -> ty::UpvarCapture {
986 self.read_enum("UpvarCapture", |this| {
987 let variants = ["ByValue", "ByRef"];
988 this.read_enum_variant(&variants, |this, i| {
990 1 => ty::UpvarCapture::ByValue,
991 2 => ty::UpvarCapture::ByRef(ty::UpvarBorrow {
992 kind: this.read_enum_variant_arg(0,
993 |this| Decodable::decode(this)).unwrap(),
994 region: this.read_enum_variant_arg(1,
995 |this| Ok(this.read_region(dcx))).unwrap()
997 _ => panic!("bad enum variant for ty::UpvarCapture")
1002 fn read_auto_adjustment<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1003 -> adjustment::AutoAdjustment<'tcx> {
1004 self.read_enum("AutoAdjustment", |this| {
1005 let variants = ["AdjustReifyFnPointer", "AdjustUnsafeFnPointer", "AdjustDerefRef"];
1006 this.read_enum_variant(&variants, |this, i| {
1008 1 => adjustment::AdjustReifyFnPointer,
1009 2 => adjustment::AdjustUnsafeFnPointer,
1011 let auto_deref_ref: adjustment::AutoDerefRef =
1012 this.read_enum_variant_arg(0,
1013 |this| Ok(this.read_auto_deref_ref(dcx))).unwrap();
1015 adjustment::AdjustDerefRef(auto_deref_ref)
1017 _ => panic!("bad enum variant for adjustment::AutoAdjustment")
1023 fn read_auto_deref_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1024 -> adjustment::AutoDerefRef<'tcx> {
1025 self.read_struct("AutoDerefRef", 2, |this| {
1026 Ok(adjustment::AutoDerefRef {
1027 autoderefs: this.read_struct_field("autoderefs", 0, |this| {
1028 Decodable::decode(this)
1030 autoref: this.read_struct_field("autoref", 1, |this| {
1031 this.read_option(|this, b| {
1033 Ok(Some(this.read_autoref(dcx)))
1039 unsize: this.read_struct_field("unsize", 2, |this| {
1040 this.read_option(|this, b| {
1042 Ok(Some(this.read_ty(dcx)))
1052 fn read_autoref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1053 -> adjustment::AutoRef<'tcx> {
1054 self.read_enum("AutoRef", |this| {
1055 let variants = ["AutoPtr", "AutoUnsafe"];
1056 this.read_enum_variant(&variants, |this, i| {
1060 this.read_enum_variant_arg(0, |this| {
1061 Ok(this.read_region(dcx))
1063 let m: hir::Mutability =
1064 this.read_enum_variant_arg(1, |this| {
1065 Decodable::decode(this)
1068 adjustment::AutoPtr(dcx.tcx.mk_region(r), m)
1071 let m: hir::Mutability =
1072 this.read_enum_variant_arg(0, |this| Decodable::decode(this)).unwrap();
1074 adjustment::AutoUnsafe(m)
1076 _ => panic!("bad enum variant for adjustment::AutoRef")
1082 fn read_cast_kind<'b, 'c>(&mut self, _dcx: &DecodeContext<'b, 'c, 'tcx>)
1085 Decodable::decode(self).unwrap()
1089 // Converts a def-id that appears in a type. The correct
1090 // translation will depend on what kind of def-id this is.
1091 // This is a subtle point: type definitions are not
1092 // inlined into the current crate, so if the def-id names
1093 // a nominal type or type alias, then it should be
1094 // translated to refer to the source crate.
1096 // However, *type parameters* are cloned along with the function
1097 // they are attached to. So we should translate those def-ids
1098 // to refer to the new, cloned copy of the type parameter.
1099 // We only see references to free type parameters in the body of
1100 // an inlined function. In such cases, we need the def-id to
1101 // be a local id so that the TypeContents code is able to lookup
1102 // the relevant info in the ty_param_defs table.
1104 // *Region parameters*, unfortunately, are another kettle of fish.
1105 // In such cases, def_id's can appear in types to distinguish
1106 // shadowed bound regions and so forth. It doesn't actually
1107 // matter so much what we do to these, since regions are erased
1108 // at trans time, but it's good to keep them consistent just in
1109 // case. We translate them with `tr_def_id()` which will map
1110 // the crate numbers back to the original source crate.
1112 // Scopes will end up as being totally bogus. This can actually
1115 // Unboxed closures are cloned along with the function being
1116 // inlined, and all side tables use interned node IDs, so we
1117 // translate their def IDs accordingly.
1119 // It'd be really nice to refactor the type repr to not include
1120 // def-ids so that all these distinctions were unnecessary.
1121 fn convert_def_id(dcx: &DecodeContext,
1124 let r = dcx.tr_def_id(did);
1125 debug!("convert_def_id(did={:?})={:?}", did, r);
1129 fn decode_side_tables(dcx: &DecodeContext,
1130 ast_doc: rbml::Doc) {
1131 let tbl_doc = ast_doc.get(c::tag_table as usize);
1132 for (tag, entry_doc) in reader::docs(tbl_doc) {
1133 let mut entry_dsr = reader::Decoder::new(entry_doc);
1134 let id0: ast::NodeId = Decodable::decode(&mut entry_dsr).unwrap();
1135 let id = dcx.tr_id(id0);
1137 debug!(">> Side table document with tag 0x{:x} \
1138 found for id {} (orig {})",
1140 let tag = tag as u32;
1141 let decoded_tag: Option<c::astencode_tag> = c::astencode_tag::from_u32(tag);
1145 &format!("unknown tag found in side tables: {:x}",
1149 let val_dsr = &mut entry_dsr;
1152 c::tag_table_def => {
1153 let def = decode_def(dcx, val_dsr);
1154 dcx.tcx.def_map.borrow_mut().insert(id, def::PathResolution {
1156 // This doesn't matter cross-crate.
1157 last_private: LastMod(AllPublic),
1161 c::tag_table_node_type => {
1162 let ty = val_dsr.read_ty(dcx);
1163 debug!("inserting ty for node {}: {:?}",
1165 dcx.tcx.node_type_insert(id, ty);
1167 c::tag_table_item_subst => {
1168 let item_substs = ty::ItemSubsts {
1169 substs: val_dsr.read_substs(dcx)
1171 dcx.tcx.tables.borrow_mut().item_substs.insert(
1174 c::tag_table_freevars => {
1175 let fv_info = val_dsr.read_to_vec(|val_dsr| {
1176 Ok(val_dsr.read_freevar_entry(dcx))
1177 }).unwrap().into_iter().collect();
1178 dcx.tcx.freevars.borrow_mut().insert(id, fv_info);
1180 c::tag_table_upvar_capture_map => {
1181 let var_id: ast::NodeId = Decodable::decode(val_dsr).unwrap();
1182 let upvar_id = ty::UpvarId {
1183 var_id: dcx.tr_id(var_id),
1186 let ub = val_dsr.read_upvar_capture(dcx);
1187 dcx.tcx.tables.borrow_mut().upvar_capture_map.insert(upvar_id, ub);
1189 c::tag_table_method_map => {
1190 let (autoderef, method) = val_dsr.read_method_callee(dcx);
1191 let method_call = ty::MethodCall {
1193 autoderef: autoderef
1195 dcx.tcx.tables.borrow_mut().method_map.insert(method_call, method);
1197 c::tag_table_adjustments => {
1199 val_dsr.read_auto_adjustment(dcx);
1200 dcx.tcx.tables.borrow_mut().adjustments.insert(id, adj);
1202 c::tag_table_cast_kinds => {
1204 val_dsr.read_cast_kind(dcx);
1205 dcx.tcx.cast_kinds.borrow_mut().insert(id, cast_kind);
1207 c::tag_table_const_qualif => {
1208 let qualif: ConstQualif = Decodable::decode(val_dsr).unwrap();
1209 dcx.tcx.const_qualif_map.borrow_mut().insert(id, qualif);
1213 &format!("unknown tag found in side tables: {:x}",
1220 debug!(">< Side table doc loaded");
1224 // copy the tcache entries from the original item to the new
1226 fn copy_item_types(dcx: &DecodeContext, ii: &InlinedItem, orig_did: DefId) {
1227 fn copy_item_type(dcx: &DecodeContext,
1228 inlined_id: ast::NodeId,
1229 remote_did: DefId) {
1230 let inlined_did = dcx.tcx.map.local_def_id(inlined_id);
1231 dcx.tcx.register_item_type(inlined_did,
1232 dcx.tcx.lookup_item_type(remote_did));
1235 // copy the entry for the item itself
1236 let item_node_id = match ii {
1237 &InlinedItem::Item(ref i) => i.id,
1238 &InlinedItem::TraitItem(_, ref ti) => ti.id,
1239 &InlinedItem::ImplItem(_, ref ii) => ii.id,
1240 &InlinedItem::Foreign(ref fi) => fi.id
1242 copy_item_type(dcx, item_node_id, orig_did);
1244 // copy the entries of inner items
1245 if let &InlinedItem::Item(ref item) = ii {
1247 hir::ItemEnum(ref def, _) => {
1248 let orig_def = dcx.tcx.lookup_adt_def(orig_did);
1249 for (i_variant, orig_variant) in
1250 def.variants.iter().zip(orig_def.variants.iter())
1252 debug!("astencode: copying variant {:?} => {:?}",
1253 orig_variant.did, i_variant.node.data.id());
1254 copy_item_type(dcx, i_variant.node.data.id(), orig_variant.did);
1257 hir::ItemStruct(ref def, _) => {
1258 if !def.is_struct() {
1259 let ctor_did = dcx.tcx.lookup_adt_def(orig_did)
1260 .struct_variant().did;
1261 debug!("astencode: copying ctor {:?} => {:?}", ctor_did,
1263 copy_item_type(dcx, def.id(), ctor_did);
1271 fn inlined_item_id_range(v: &InlinedItem) -> ast_util::IdRange {
1272 let mut visitor = ast_util::IdRangeComputingVisitor::new();
1273 v.visit_ids(&mut visitor);
1277 // ______________________________________________________________________
1278 // Testing of astencode_gen
1281 fn encode_item_ast(rbml_w: &mut Encoder, item: &hir::Item) {
1282 rbml_w.start_tag(c::tag_tree as usize);
1283 (*item).encode(rbml_w);
1288 fn decode_item_ast(par_doc: rbml::Doc) -> hir::Item {
1289 let chi_doc = par_doc.get(c::tag_tree as usize);
1290 let mut d = reader::Decoder::new(chi_doc);
1291 Decodable::decode(&mut d).unwrap()
1296 fn call_site(&self) -> codemap::Span;
1297 fn cfg(&self) -> ast::CrateConfig;
1298 fn ident_of(&self, st: &str) -> ast::Ident;
1299 fn name_of(&self, st: &str) -> ast::Name;
1300 fn parse_sess(&self) -> &parse::ParseSess;
1304 impl FakeExtCtxt for parse::ParseSess {
1305 fn call_site(&self) -> codemap::Span {
1307 lo: codemap::BytePos(0),
1308 hi: codemap::BytePos(0),
1309 expn_id: codemap::NO_EXPANSION,
1312 fn cfg(&self) -> ast::CrateConfig { Vec::new() }
1313 fn ident_of(&self, st: &str) -> ast::Ident {
1314 parse::token::str_to_ident(st)
1316 fn name_of(&self, st: &str) -> ast::Name {
1317 parse::token::intern(st)
1319 fn parse_sess(&self) -> &parse::ParseSess { self }
1323 struct FakeNodeIdAssigner;
1326 // It should go without saying that this may give unexpected results. Avoid
1327 // lowering anything which needs new nodes.
1328 impl NodeIdAssigner for FakeNodeIdAssigner {
1329 fn next_node_id(&self) -> NodeId {
1333 fn peek_node_id(&self) -> NodeId {
1339 fn mk_ctxt() -> parse::ParseSess {
1340 parse::ParseSess::new()
1344 fn roundtrip(in_item: hir::Item) {
1345 let mut wr = Cursor::new(Vec::new());
1346 encode_item_ast(&mut Encoder::new(&mut wr), &in_item);
1347 let rbml_doc = rbml::Doc::new(wr.get_ref());
1348 let out_item = decode_item_ast(rbml_doc);
1350 assert!(in_item == out_item);
1356 let fnia = FakeNodeIdAssigner;
1357 let lcx = LoweringContext::new(&fnia, None);
1358 roundtrip(lower_item(&lcx, "e_item!(&cx,
1364 fn test_smalltalk() {
1366 let fnia = FakeNodeIdAssigner;
1367 let lcx = LoweringContext::new(&fnia, None);
1368 roundtrip(lower_item(&lcx, "e_item!(&cx,
1369 fn foo() -> isize { 3 + 4 } // first smalltalk program ever executed.
1376 let fnia = FakeNodeIdAssigner;
1377 let lcx = LoweringContext::new(&fnia, None);
1378 roundtrip(lower_item(&lcx, "e_item!(&cx,
1379 fn foo(x: usize, y: usize) -> usize {
1387 fn test_simplification() {
1389 let item = quote_item!(&cx,
1390 fn new_int_alist<B>() -> alist<isize, B> {
1391 fn eq_int(a: isize, b: isize) -> bool { a == b }
1392 return alist {eq_fn: eq_int, data: Vec::new()};
1395 let fnia = FakeNodeIdAssigner;
1396 let lcx = LoweringContext::new(&fnia, None);
1397 let hir_item = lower_item(&lcx, &item);
1398 let item_in = InlinedItemRef::Item(&hir_item);
1399 let item_out = simplify_ast(item_in);
1400 let item_exp = InlinedItem::Item(P(lower_item(&lcx, "e_item!(&cx,
1401 fn new_int_alist<B>() -> alist<isize, B> {
1402 return alist {eq_fn: eq_int, data: Vec::new()};
1405 match (item_out, item_exp) {
1406 (InlinedItem::Item(item_out), InlinedItem::Item(item_exp)) => {
1407 assert!(pprust::item_to_string(&item_out) ==
1408 pprust::item_to_string(&item_exp));