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::AdjustMutToConstPointer => {
624 this.emit_enum_variant("AdjustMutToConstPointer", 3, 0, |_| {
629 adjustment::AdjustDerefRef(ref auto_deref_ref) => {
630 this.emit_enum_variant("AdjustDerefRef", 4, 2, |this| {
631 this.emit_enum_variant_arg(0,
632 |this| Ok(this.emit_auto_deref_ref(ecx, auto_deref_ref)))
639 fn emit_autoref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
640 autoref: &adjustment::AutoRef<'tcx>) {
641 use serialize::Encoder;
643 self.emit_enum("AutoRef", |this| {
645 &adjustment::AutoPtr(r, m) => {
646 this.emit_enum_variant("AutoPtr", 0, 2, |this| {
647 this.emit_enum_variant_arg(0,
648 |this| Ok(this.emit_region(ecx, *r)));
649 this.emit_enum_variant_arg(1, |this| m.encode(this))
652 &adjustment::AutoUnsafe(m) => {
653 this.emit_enum_variant("AutoUnsafe", 1, 1, |this| {
654 this.emit_enum_variant_arg(0, |this| m.encode(this))
661 fn emit_auto_deref_ref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
662 auto_deref_ref: &adjustment::AutoDerefRef<'tcx>) {
663 use serialize::Encoder;
665 self.emit_struct("AutoDerefRef", 2, |this| {
666 this.emit_struct_field("autoderefs", 0, |this| auto_deref_ref.autoderefs.encode(this));
668 this.emit_struct_field("autoref", 1, |this| {
669 this.emit_option(|this| {
670 match auto_deref_ref.autoref {
671 None => this.emit_option_none(),
672 Some(ref a) => this.emit_option_some(|this| Ok(this.emit_autoref(ecx, a))),
677 this.emit_struct_field("unsize", 2, |this| {
678 this.emit_option(|this| {
679 match auto_deref_ref.unsize {
680 None => this.emit_option_none(),
681 Some(target) => this.emit_option_some(|this| {
682 Ok(this.emit_ty(ecx, target))
691 trait write_tag_and_id {
692 fn tag<F>(&mut self, tag_id: c::astencode_tag, f: F) where F: FnOnce(&mut Self);
693 fn id(&mut self, id: ast::NodeId);
696 impl<'a> write_tag_and_id for Encoder<'a> {
698 tag_id: c::astencode_tag,
700 F: FnOnce(&mut Encoder<'a>),
702 self.start_tag(tag_id as usize);
707 fn id(&mut self, id: ast::NodeId) {
708 id.encode(self).unwrap();
712 struct SideTableEncodingIdVisitor<'a, 'b:'a, 'c:'a, 'tcx:'c> {
713 ecx: &'a e::EncodeContext<'c, 'tcx>,
714 rbml_w: &'a mut Encoder<'b>,
717 impl<'a, 'b, 'c, 'tcx> ast_util::IdVisitingOperation for
718 SideTableEncodingIdVisitor<'a, 'b, 'c, 'tcx> {
719 fn visit_id(&mut self, id: ast::NodeId) {
720 encode_side_tables_for_id(self.ecx, self.rbml_w, id)
724 fn encode_side_tables_for_ii(ecx: &e::EncodeContext,
725 rbml_w: &mut Encoder,
727 rbml_w.start_tag(c::tag_table as usize);
728 ii.visit_ids(&mut SideTableEncodingIdVisitor {
735 fn encode_side_tables_for_id(ecx: &e::EncodeContext,
736 rbml_w: &mut Encoder,
740 debug!("Encoding side tables for id {}", id);
742 if let Some(def) = tcx.def_map.borrow().get(&id).map(|d| d.full_def()) {
743 rbml_w.tag(c::tag_table_def, |rbml_w| {
745 def.encode(rbml_w).unwrap();
749 if let Some(ty) = tcx.node_types().get(&id) {
750 rbml_w.tag(c::tag_table_node_type, |rbml_w| {
752 rbml_w.emit_ty(ecx, *ty);
756 if let Some(item_substs) = tcx.tables.borrow().item_substs.get(&id) {
757 rbml_w.tag(c::tag_table_item_subst, |rbml_w| {
759 rbml_w.emit_substs(ecx, &item_substs.substs);
763 if let Some(fv) = tcx.freevars.borrow().get(&id) {
764 rbml_w.tag(c::tag_table_freevars, |rbml_w| {
766 rbml_w.emit_from_vec(fv, |rbml_w, fv_entry| {
767 Ok(encode_freevar_entry(rbml_w, fv_entry))
772 rbml_w.tag(c::tag_table_upvar_capture_map, |rbml_w| {
775 let var_id = freevar.def.var_id();
776 let upvar_id = ty::UpvarId {
780 let upvar_capture = tcx.tables
786 var_id.encode(rbml_w);
787 rbml_w.emit_upvar_capture(ecx, &upvar_capture);
792 let method_call = ty::MethodCall::expr(id);
793 if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) {
794 rbml_w.tag(c::tag_table_method_map, |rbml_w| {
796 encode_method_callee(ecx, rbml_w, method_call.autoderef, method)
800 if let Some(adjustment) = tcx.tables.borrow().adjustments.get(&id) {
802 adjustment::AdjustDerefRef(ref adj) => {
803 for autoderef in 0..adj.autoderefs {
804 let method_call = ty::MethodCall::autoderef(id, autoderef as u32);
805 if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) {
806 rbml_w.tag(c::tag_table_method_map, |rbml_w| {
808 encode_method_callee(ecx, rbml_w,
809 method_call.autoderef, method)
817 rbml_w.tag(c::tag_table_adjustments, |rbml_w| {
819 rbml_w.emit_auto_adjustment(ecx, adjustment);
823 if let Some(cast_kind) = tcx.cast_kinds.borrow().get(&id) {
824 rbml_w.tag(c::tag_table_cast_kinds, |rbml_w| {
826 encode_cast_kind(rbml_w, *cast_kind)
830 if let Some(qualif) = tcx.const_qualif_map.borrow().get(&id) {
831 rbml_w.tag(c::tag_table_const_qualif, |rbml_w| {
833 qualif.encode(rbml_w).unwrap()
838 trait doc_decoder_helpers: Sized {
839 fn as_int(&self) -> isize;
840 fn opt_child(&self, tag: c::astencode_tag) -> Option<Self>;
843 impl<'a> doc_decoder_helpers for rbml::Doc<'a> {
844 fn as_int(&self) -> isize { reader::doc_as_u64(*self) as isize }
845 fn opt_child(&self, tag: c::astencode_tag) -> Option<rbml::Doc<'a>> {
846 reader::maybe_get_doc(*self, tag as usize)
850 trait rbml_decoder_decoder_helpers<'tcx> {
851 fn read_ty_encoded<'a, 'b, F, R>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>,
853 where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x, 'tcx>) -> R;
855 fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region;
856 fn read_ty<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Ty<'tcx>;
857 fn read_tys<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Vec<Ty<'tcx>>;
858 fn read_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
859 -> ty::TraitRef<'tcx>;
860 fn read_poly_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
861 -> ty::PolyTraitRef<'tcx>;
862 fn read_predicate<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
863 -> ty::Predicate<'tcx>;
864 fn read_existential_bounds<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
865 -> ty::ExistentialBounds<'tcx>;
866 fn read_substs<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
867 -> subst::Substs<'tcx>;
868 fn read_upvar_capture(&mut self, dcx: &DecodeContext)
870 fn read_auto_adjustment<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
871 -> adjustment::AutoAdjustment<'tcx>;
872 fn read_cast_kind<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
874 fn read_auto_deref_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
875 -> adjustment::AutoDerefRef<'tcx>;
876 fn read_autoref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
877 -> adjustment::AutoRef<'tcx>;
879 // Versions of the type reading functions that don't need the full
881 fn read_ty_nodcx(&mut self,
882 tcx: &ty::ctxt<'tcx>, cdata: &cstore::crate_metadata) -> Ty<'tcx>;
883 fn read_tys_nodcx(&mut self,
884 tcx: &ty::ctxt<'tcx>,
885 cdata: &cstore::crate_metadata) -> Vec<Ty<'tcx>>;
886 fn read_substs_nodcx(&mut self, tcx: &ty::ctxt<'tcx>,
887 cdata: &cstore::crate_metadata)
888 -> subst::Substs<'tcx>;
891 impl<'a, 'tcx> rbml_decoder_decoder_helpers<'tcx> for reader::Decoder<'a> {
892 fn read_ty_nodcx(&mut self,
893 tcx: &ty::ctxt<'tcx>,
894 cdata: &cstore::crate_metadata)
896 self.read_opaque(|_, doc| {
898 tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc,
899 &mut |id| decoder::translate_def_id(cdata, id))
904 fn read_tys_nodcx(&mut self,
905 tcx: &ty::ctxt<'tcx>,
906 cdata: &cstore::crate_metadata) -> Vec<Ty<'tcx>> {
907 self.read_to_vec(|this| Ok(this.read_ty_nodcx(tcx, cdata)) )
913 fn read_substs_nodcx(&mut self,
914 tcx: &ty::ctxt<'tcx>,
915 cdata: &cstore::crate_metadata)
916 -> subst::Substs<'tcx>
918 self.read_opaque(|_, doc| {
920 tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc,
921 &mut |id| decoder::translate_def_id(cdata, id))
926 fn read_ty_encoded<'b, 'c, F, R>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>, op: F) -> R
927 where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x,'tcx>) -> R
929 return self.read_opaque(|_, doc| {
930 debug!("read_ty_encoded({})", type_string(doc));
932 &mut tydecode::TyDecoder::with_doc(
933 dcx.tcx, dcx.cdata.cnum, doc,
934 &mut |d| convert_def_id(dcx, d))))
937 fn type_string(doc: rbml::Doc) -> String {
938 let mut str = String::new();
939 for i in doc.start..doc.end {
940 str.push(doc.data[i] as char);
945 fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region {
946 // Note: regions types embed local node ids. In principle, we
947 // should translate these node ids into the new decode
948 // context. However, we do not bother, because region types
949 // are not used during trans. This also applies to read_ty.
950 return self.read_ty_encoded(dcx, |decoder| decoder.parse_region());
952 fn read_ty<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) -> Ty<'tcx> {
953 return self.read_ty_encoded(dcx, |decoder| decoder.parse_ty());
956 fn read_tys<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
958 self.read_to_vec(|this| Ok(this.read_ty(dcx))).unwrap().into_iter().collect()
961 fn read_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
962 -> ty::TraitRef<'tcx> {
963 self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref())
966 fn read_poly_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
967 -> ty::PolyTraitRef<'tcx> {
968 ty::Binder(self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref()))
971 fn read_predicate<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
972 -> ty::Predicate<'tcx>
974 self.read_ty_encoded(dcx, |decoder| decoder.parse_predicate())
977 fn read_existential_bounds<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
978 -> ty::ExistentialBounds<'tcx>
980 self.read_ty_encoded(dcx, |decoder| decoder.parse_existential_bounds())
983 fn read_substs<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
984 -> subst::Substs<'tcx> {
985 self.read_opaque(|_, doc| {
986 Ok(tydecode::TyDecoder::with_doc(dcx.tcx, dcx.cdata.cnum, doc,
987 &mut |d| convert_def_id(dcx, d))
991 fn read_upvar_capture(&mut self, dcx: &DecodeContext) -> ty::UpvarCapture {
992 self.read_enum("UpvarCapture", |this| {
993 let variants = ["ByValue", "ByRef"];
994 this.read_enum_variant(&variants, |this, i| {
996 1 => ty::UpvarCapture::ByValue,
997 2 => ty::UpvarCapture::ByRef(ty::UpvarBorrow {
998 kind: this.read_enum_variant_arg(0,
999 |this| Decodable::decode(this)).unwrap(),
1000 region: this.read_enum_variant_arg(1,
1001 |this| Ok(this.read_region(dcx))).unwrap()
1003 _ => panic!("bad enum variant for ty::UpvarCapture")
1008 fn read_auto_adjustment<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1009 -> adjustment::AutoAdjustment<'tcx> {
1010 self.read_enum("AutoAdjustment", |this| {
1011 let variants = ["AdjustReifyFnPointer", "AdjustUnsafeFnPointer",
1012 "AdjustMutToConstPointer", "AdjustDerefRef"];
1013 this.read_enum_variant(&variants, |this, i| {
1015 1 => adjustment::AdjustReifyFnPointer,
1016 2 => adjustment::AdjustUnsafeFnPointer,
1017 3 => adjustment::AdjustMutToConstPointer,
1019 let auto_deref_ref: adjustment::AutoDerefRef =
1020 this.read_enum_variant_arg(0,
1021 |this| Ok(this.read_auto_deref_ref(dcx))).unwrap();
1023 adjustment::AdjustDerefRef(auto_deref_ref)
1025 _ => panic!("bad enum variant for adjustment::AutoAdjustment")
1031 fn read_auto_deref_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1032 -> adjustment::AutoDerefRef<'tcx> {
1033 self.read_struct("AutoDerefRef", 2, |this| {
1034 Ok(adjustment::AutoDerefRef {
1035 autoderefs: this.read_struct_field("autoderefs", 0, |this| {
1036 Decodable::decode(this)
1038 autoref: this.read_struct_field("autoref", 1, |this| {
1039 this.read_option(|this, b| {
1041 Ok(Some(this.read_autoref(dcx)))
1047 unsize: this.read_struct_field("unsize", 2, |this| {
1048 this.read_option(|this, b| {
1050 Ok(Some(this.read_ty(dcx)))
1060 fn read_autoref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1061 -> adjustment::AutoRef<'tcx> {
1062 self.read_enum("AutoRef", |this| {
1063 let variants = ["AutoPtr", "AutoUnsafe"];
1064 this.read_enum_variant(&variants, |this, i| {
1068 this.read_enum_variant_arg(0, |this| {
1069 Ok(this.read_region(dcx))
1071 let m: hir::Mutability =
1072 this.read_enum_variant_arg(1, |this| {
1073 Decodable::decode(this)
1076 adjustment::AutoPtr(dcx.tcx.mk_region(r), m)
1079 let m: hir::Mutability =
1080 this.read_enum_variant_arg(0, |this| Decodable::decode(this)).unwrap();
1082 adjustment::AutoUnsafe(m)
1084 _ => panic!("bad enum variant for adjustment::AutoRef")
1090 fn read_cast_kind<'b, 'c>(&mut self, _dcx: &DecodeContext<'b, 'c, 'tcx>)
1093 Decodable::decode(self).unwrap()
1097 // Converts a def-id that appears in a type. The correct
1098 // translation will depend on what kind of def-id this is.
1099 // This is a subtle point: type definitions are not
1100 // inlined into the current crate, so if the def-id names
1101 // a nominal type or type alias, then it should be
1102 // translated to refer to the source crate.
1104 // However, *type parameters* are cloned along with the function
1105 // they are attached to. So we should translate those def-ids
1106 // to refer to the new, cloned copy of the type parameter.
1107 // We only see references to free type parameters in the body of
1108 // an inlined function. In such cases, we need the def-id to
1109 // be a local id so that the TypeContents code is able to lookup
1110 // the relevant info in the ty_param_defs table.
1112 // *Region parameters*, unfortunately, are another kettle of fish.
1113 // In such cases, def_id's can appear in types to distinguish
1114 // shadowed bound regions and so forth. It doesn't actually
1115 // matter so much what we do to these, since regions are erased
1116 // at trans time, but it's good to keep them consistent just in
1117 // case. We translate them with `tr_def_id()` which will map
1118 // the crate numbers back to the original source crate.
1120 // Scopes will end up as being totally bogus. This can actually
1123 // Unboxed closures are cloned along with the function being
1124 // inlined, and all side tables use interned node IDs, so we
1125 // translate their def IDs accordingly.
1127 // It'd be really nice to refactor the type repr to not include
1128 // def-ids so that all these distinctions were unnecessary.
1129 fn convert_def_id(dcx: &DecodeContext,
1132 let r = dcx.tr_def_id(did);
1133 debug!("convert_def_id(did={:?})={:?}", did, r);
1137 fn decode_side_tables(dcx: &DecodeContext,
1138 ast_doc: rbml::Doc) {
1139 let tbl_doc = ast_doc.get(c::tag_table as usize);
1140 for (tag, entry_doc) in reader::docs(tbl_doc) {
1141 let mut entry_dsr = reader::Decoder::new(entry_doc);
1142 let id0: ast::NodeId = Decodable::decode(&mut entry_dsr).unwrap();
1143 let id = dcx.tr_id(id0);
1145 debug!(">> Side table document with tag 0x{:x} \
1146 found for id {} (orig {})",
1148 let tag = tag as u32;
1149 let decoded_tag: Option<c::astencode_tag> = c::astencode_tag::from_u32(tag);
1153 &format!("unknown tag found in side tables: {:x}",
1157 let val_dsr = &mut entry_dsr;
1160 c::tag_table_def => {
1161 let def = decode_def(dcx, val_dsr);
1162 dcx.tcx.def_map.borrow_mut().insert(id, def::PathResolution {
1164 // This doesn't matter cross-crate.
1165 last_private: LastMod(AllPublic),
1169 c::tag_table_node_type => {
1170 let ty = val_dsr.read_ty(dcx);
1171 debug!("inserting ty for node {}: {:?}",
1173 dcx.tcx.node_type_insert(id, ty);
1175 c::tag_table_item_subst => {
1176 let item_substs = ty::ItemSubsts {
1177 substs: val_dsr.read_substs(dcx)
1179 dcx.tcx.tables.borrow_mut().item_substs.insert(
1182 c::tag_table_freevars => {
1183 let fv_info = val_dsr.read_to_vec(|val_dsr| {
1184 Ok(val_dsr.read_freevar_entry(dcx))
1185 }).unwrap().into_iter().collect();
1186 dcx.tcx.freevars.borrow_mut().insert(id, fv_info);
1188 c::tag_table_upvar_capture_map => {
1189 let var_id: ast::NodeId = Decodable::decode(val_dsr).unwrap();
1190 let upvar_id = ty::UpvarId {
1191 var_id: dcx.tr_id(var_id),
1194 let ub = val_dsr.read_upvar_capture(dcx);
1195 dcx.tcx.tables.borrow_mut().upvar_capture_map.insert(upvar_id, ub);
1197 c::tag_table_method_map => {
1198 let (autoderef, method) = val_dsr.read_method_callee(dcx);
1199 let method_call = ty::MethodCall {
1201 autoderef: autoderef
1203 dcx.tcx.tables.borrow_mut().method_map.insert(method_call, method);
1205 c::tag_table_adjustments => {
1207 val_dsr.read_auto_adjustment(dcx);
1208 dcx.tcx.tables.borrow_mut().adjustments.insert(id, adj);
1210 c::tag_table_cast_kinds => {
1212 val_dsr.read_cast_kind(dcx);
1213 dcx.tcx.cast_kinds.borrow_mut().insert(id, cast_kind);
1215 c::tag_table_const_qualif => {
1216 let qualif: ConstQualif = Decodable::decode(val_dsr).unwrap();
1217 dcx.tcx.const_qualif_map.borrow_mut().insert(id, qualif);
1221 &format!("unknown tag found in side tables: {:x}",
1228 debug!(">< Side table doc loaded");
1232 // copy the tcache entries from the original item to the new
1234 fn copy_item_types(dcx: &DecodeContext, ii: &InlinedItem, orig_did: DefId) {
1235 fn copy_item_type(dcx: &DecodeContext,
1236 inlined_id: ast::NodeId,
1237 remote_did: DefId) {
1238 let inlined_did = dcx.tcx.map.local_def_id(inlined_id);
1239 dcx.tcx.register_item_type(inlined_did,
1240 dcx.tcx.lookup_item_type(remote_did));
1243 // copy the entry for the item itself
1244 let item_node_id = match ii {
1245 &InlinedItem::Item(ref i) => i.id,
1246 &InlinedItem::TraitItem(_, ref ti) => ti.id,
1247 &InlinedItem::ImplItem(_, ref ii) => ii.id,
1248 &InlinedItem::Foreign(ref fi) => fi.id
1250 copy_item_type(dcx, item_node_id, orig_did);
1252 // copy the entries of inner items
1253 if let &InlinedItem::Item(ref item) = ii {
1255 hir::ItemEnum(ref def, _) => {
1256 let orig_def = dcx.tcx.lookup_adt_def(orig_did);
1257 for (i_variant, orig_variant) in
1258 def.variants.iter().zip(orig_def.variants.iter())
1260 debug!("astencode: copying variant {:?} => {:?}",
1261 orig_variant.did, i_variant.node.data.id());
1262 copy_item_type(dcx, i_variant.node.data.id(), orig_variant.did);
1265 hir::ItemStruct(ref def, _) => {
1266 if !def.is_struct() {
1267 let ctor_did = dcx.tcx.lookup_adt_def(orig_did)
1268 .struct_variant().did;
1269 debug!("astencode: copying ctor {:?} => {:?}", ctor_did,
1271 copy_item_type(dcx, def.id(), ctor_did);
1279 fn inlined_item_id_range(v: &InlinedItem) -> ast_util::IdRange {
1280 let mut visitor = ast_util::IdRangeComputingVisitor::new();
1281 v.visit_ids(&mut visitor);
1285 // ______________________________________________________________________
1286 // Testing of astencode_gen
1289 fn encode_item_ast(rbml_w: &mut Encoder, item: &hir::Item) {
1290 rbml_w.start_tag(c::tag_tree as usize);
1291 (*item).encode(rbml_w);
1296 fn decode_item_ast(par_doc: rbml::Doc) -> hir::Item {
1297 let chi_doc = par_doc.get(c::tag_tree as usize);
1298 let mut d = reader::Decoder::new(chi_doc);
1299 Decodable::decode(&mut d).unwrap()
1304 fn call_site(&self) -> codemap::Span;
1305 fn cfg(&self) -> ast::CrateConfig;
1306 fn ident_of(&self, st: &str) -> ast::Ident;
1307 fn name_of(&self, st: &str) -> ast::Name;
1308 fn parse_sess(&self) -> &parse::ParseSess;
1312 impl FakeExtCtxt for parse::ParseSess {
1313 fn call_site(&self) -> codemap::Span {
1315 lo: codemap::BytePos(0),
1316 hi: codemap::BytePos(0),
1317 expn_id: codemap::NO_EXPANSION,
1320 fn cfg(&self) -> ast::CrateConfig { Vec::new() }
1321 fn ident_of(&self, st: &str) -> ast::Ident {
1322 parse::token::str_to_ident(st)
1324 fn name_of(&self, st: &str) -> ast::Name {
1325 parse::token::intern(st)
1327 fn parse_sess(&self) -> &parse::ParseSess { self }
1331 struct FakeNodeIdAssigner;
1334 // It should go without saying that this may give unexpected results. Avoid
1335 // lowering anything which needs new nodes.
1336 impl NodeIdAssigner for FakeNodeIdAssigner {
1337 fn next_node_id(&self) -> NodeId {
1341 fn peek_node_id(&self) -> NodeId {
1347 fn mk_ctxt() -> parse::ParseSess {
1348 parse::ParseSess::new()
1352 fn roundtrip(in_item: hir::Item) {
1353 let mut wr = Cursor::new(Vec::new());
1354 encode_item_ast(&mut Encoder::new(&mut wr), &in_item);
1355 let rbml_doc = rbml::Doc::new(wr.get_ref());
1356 let out_item = decode_item_ast(rbml_doc);
1358 assert!(in_item == out_item);
1364 let fnia = FakeNodeIdAssigner;
1365 let lcx = LoweringContext::new(&fnia, None);
1366 roundtrip(lower_item(&lcx, "e_item!(&cx,
1372 fn test_smalltalk() {
1374 let fnia = FakeNodeIdAssigner;
1375 let lcx = LoweringContext::new(&fnia, None);
1376 roundtrip(lower_item(&lcx, "e_item!(&cx,
1377 fn foo() -> isize { 3 + 4 } // first smalltalk program ever executed.
1384 let fnia = FakeNodeIdAssigner;
1385 let lcx = LoweringContext::new(&fnia, None);
1386 roundtrip(lower_item(&lcx, "e_item!(&cx,
1387 fn foo(x: usize, y: usize) -> usize {
1395 fn test_simplification() {
1397 let item = quote_item!(&cx,
1398 fn new_int_alist<B>() -> alist<isize, B> {
1399 fn eq_int(a: isize, b: isize) -> bool { a == b }
1400 return alist {eq_fn: eq_int, data: Vec::new()};
1403 let fnia = FakeNodeIdAssigner;
1404 let lcx = LoweringContext::new(&fnia, None);
1405 let hir_item = lower_item(&lcx, &item);
1406 let item_in = InlinedItemRef::Item(&hir_item);
1407 let item_out = simplify_ast(item_in);
1408 let item_exp = InlinedItem::Item(P(lower_item(&lcx, "e_item!(&cx,
1409 fn new_int_alist<B>() -> alist<isize, B> {
1410 return alist {eq_fn: eq_int, data: Vec::new()};
1413 match (item_out, item_exp) {
1414 (InlinedItem::Item(item_out), InlinedItem::Item(item_exp)) => {
1415 assert!(pprust::item_to_string(&item_out) ==
1416 pprust::item_to_string(&item_exp));