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::check_const::ConstQualif;
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 path: Vec<ast_map::PathElem>,
128 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((path, 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(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, path, def_path, raw_ii, dcx);
157 let name = match *ii {
158 InlinedItem::Item(ref i) => i.name,
159 InlinedItem::Foreign(ref i) => i.name,
160 InlinedItem::TraitItem(_, ref ti) => ti.name,
161 InlinedItem::ImplItem(_, ref ii) => ii.name
163 debug!("Fn named: {}", name);
164 debug!("< Decoded inlined fn: {}::{}",
165 path_as_str.unwrap(),
167 region::resolve_inlined_item(&tcx.sess, &tcx.region_maps, ii);
168 decode_side_tables(dcx, ast_doc);
169 copy_item_types(dcx, ii, orig_did);
171 InlinedItem::Item(ref i) => {
172 debug!(">>> DECODED ITEM >>>\n{}\n<<< DECODED ITEM <<<",
173 ::rustc_front::print::pprust::item_to_string(&**i));
182 // ______________________________________________________________________
183 // Enumerating the IDs which appear in an AST
185 fn reserve_id_range(sess: &Session,
186 from_id_range: ast_util::IdRange) -> ast_util::IdRange {
187 // Handle the case of an empty range:
188 if from_id_range.empty() { return from_id_range; }
189 let cnt = from_id_range.max - from_id_range.min;
190 let to_id_min = sess.reserve_node_ids(cnt);
191 let to_id_max = to_id_min + cnt;
192 ast_util::IdRange { min: to_id_min, max: to_id_max }
195 impl<'a, 'b, 'tcx> DecodeContext<'a, 'b, 'tcx> {
196 /// Translates an internal id, meaning a node id that is known to refer to some part of the
197 /// item currently being inlined, such as a local variable or argument. All naked node-ids
198 /// that appear in types have this property, since if something might refer to an external item
199 /// we would use a def-id to allow for the possibility that the item resides in another crate.
200 pub fn tr_id(&self, id: ast::NodeId) -> ast::NodeId {
201 // from_id_range should be non-empty
202 assert!(!self.from_id_range.empty());
203 // Use wrapping arithmetic because otherwise it introduces control flow.
204 // Maybe we should just have the control flow? -- aatch
205 (id.wrapping_sub(self.from_id_range.min).wrapping_add(self.to_id_range.min))
208 /// Translates an EXTERNAL def-id, converting the crate number from the one used in the encoded
209 /// data to the current crate numbers.. By external, I mean that it be translated to a
210 /// reference to the item in its original crate, as opposed to being translated to a reference
211 /// to the inlined version of the item. This is typically, but not always, what you want,
212 /// because most def-ids refer to external things like types or other fns that may or may not
213 /// be inlined. Note that even when the inlined function is referencing itself recursively, we
214 /// would want `tr_def_id` for that reference--- conceptually the function calls the original,
215 /// non-inlined version, and trans deals with linking that recursive call to the inlined copy.
216 pub fn tr_def_id(&self, did: DefId) -> DefId {
217 decoder::translate_def_id(self.cdata, did)
220 /// Translates a `Span` from an extern crate to the corresponding `Span`
221 /// within the local crate's codemap.
222 pub fn tr_span(&self, span: codemap::Span) -> codemap::Span {
223 decoder::translate_span(self.cdata,
224 self.tcx.sess.codemap(),
225 &self.last_filemap_index,
231 fn tr(&self, dcx: &DecodeContext) -> DefId {
236 impl tr for Option<DefId> {
237 fn tr(&self, dcx: &DecodeContext) -> Option<DefId> {
238 self.map(|d| dcx.tr_def_id(d))
242 impl tr for codemap::Span {
243 fn tr(&self, dcx: &DecodeContext) -> codemap::Span {
248 trait def_id_encoder_helpers {
249 fn emit_def_id(&mut self, did: DefId);
252 impl<S:serialize::Encoder> def_id_encoder_helpers for S
253 where <S as serialize::serialize::Encoder>::Error: Debug
255 fn emit_def_id(&mut self, did: DefId) {
256 did.encode(self).unwrap()
260 trait def_id_decoder_helpers {
261 fn read_def_id(&mut self, dcx: &DecodeContext) -> DefId;
262 fn read_def_id_nodcx(&mut self,
263 cdata: &cstore::crate_metadata) -> DefId;
266 impl<D:serialize::Decoder> def_id_decoder_helpers for D
267 where <D as serialize::serialize::Decoder>::Error: Debug
269 fn read_def_id(&mut self, dcx: &DecodeContext) -> DefId {
270 let did: DefId = Decodable::decode(self).unwrap();
274 fn read_def_id_nodcx(&mut self,
275 cdata: &cstore::crate_metadata)
277 let did: DefId = Decodable::decode(self).unwrap();
278 decoder::translate_def_id(cdata, did)
282 // ______________________________________________________________________
283 // Encoding and decoding the AST itself
285 // When decoding, we have to renumber the AST so that the node ids that
286 // appear within are disjoint from the node ids in our existing ASTs.
287 // We also have to adjust the spans: for now we just insert a dummy span,
288 // but eventually we should add entries to the local codemap as required.
290 fn encode_ast(rbml_w: &mut Encoder, item: &InlinedItem) {
291 rbml_w.start_tag(c::tag_tree as usize);
296 struct NestedItemsDropper;
298 impl Folder for NestedItemsDropper {
299 fn fold_block(&mut self, blk: P<hir::Block>) -> P<hir::Block> {
300 blk.and_then(|hir::Block {id, stmts, expr, rules, span, ..}| {
301 let stmts_sans_items = stmts.into_iter().filter_map(|stmt| {
302 let use_stmt = match stmt.node {
303 hir::StmtExpr(_, _) | hir::StmtSemi(_, _) => true,
304 hir::StmtDecl(ref decl, _) => {
306 hir::DeclLocal(_) => true,
307 hir::DeclItem(_) => false,
317 let blk_sans_items = P(hir::Block {
318 stmts: stmts_sans_items,
324 fold::noop_fold_block(blk_sans_items, self)
329 // Produces a simplified copy of the AST which does not include things
330 // that we do not need to or do not want to export. For example, we
331 // do not include any nested items: if these nested items are to be
332 // inlined, their AST will be exported separately (this only makes
333 // sense because, in Rust, nested items are independent except for
334 // their visibility).
336 // As it happens, trans relies on the fact that we do not export
337 // nested items, as otherwise it would get confused when translating
339 fn simplify_ast(ii: InlinedItemRef) -> InlinedItem {
340 let mut fld = NestedItemsDropper;
343 // HACK we're not dropping items.
344 InlinedItemRef::Item(i) => {
345 InlinedItem::Item(P(fold::noop_fold_item(i.clone(), &mut fld)))
347 InlinedItemRef::TraitItem(d, ti) => {
348 InlinedItem::TraitItem(d, P(fold::noop_fold_trait_item(ti.clone(), &mut fld)))
350 InlinedItemRef::ImplItem(d, ii) => {
351 InlinedItem::ImplItem(d, P(fold::noop_fold_impl_item(ii.clone(), &mut fld)))
353 InlinedItemRef::Foreign(i) => {
354 InlinedItem::Foreign(P(fold::noop_fold_foreign_item(i.clone(), &mut fld)))
359 fn decode_ast(par_doc: rbml::Doc) -> InlinedItem {
360 let chi_doc = par_doc.get(c::tag_tree as usize);
361 let mut d = reader::Decoder::new(chi_doc);
362 Decodable::decode(&mut d).unwrap()
365 // ______________________________________________________________________
366 // Encoding and decoding of ast::def
368 fn decode_def(dcx: &DecodeContext, dsr: &mut reader::Decoder) -> def::Def {
369 let def: def::Def = Decodable::decode(dsr).unwrap();
373 impl tr for def::Def {
374 fn tr(&self, dcx: &DecodeContext) -> def::Def {
376 def::DefFn(did, is_ctor) => def::DefFn(did.tr(dcx), is_ctor),
377 def::DefMethod(did) => def::DefMethod(did.tr(dcx)),
378 def::DefSelfTy(opt_did, impl_ids) => { def::DefSelfTy(opt_did.map(|did| did.tr(dcx)),
379 impl_ids.map(|(nid1, nid2)| {
383 def::DefMod(did) => { def::DefMod(did.tr(dcx)) }
384 def::DefForeignMod(did) => { def::DefForeignMod(did.tr(dcx)) }
385 def::DefStatic(did, m) => { def::DefStatic(did.tr(dcx), m) }
386 def::DefConst(did) => { def::DefConst(did.tr(dcx)) }
387 def::DefAssociatedConst(did) => def::DefAssociatedConst(did.tr(dcx)),
388 def::DefLocal(_, nid) => {
389 let nid = dcx.tr_id(nid);
390 let did = dcx.tcx.map.local_def_id(nid);
391 def::DefLocal(did, nid)
393 def::DefVariant(e_did, v_did, is_s) => {
394 def::DefVariant(e_did.tr(dcx), v_did.tr(dcx), is_s)
396 def::DefTrait(did) => def::DefTrait(did.tr(dcx)),
397 def::DefTy(did, is_enum) => def::DefTy(did.tr(dcx), is_enum),
398 def::DefAssociatedTy(trait_did, did) =>
399 def::DefAssociatedTy(trait_did.tr(dcx), did.tr(dcx)),
400 def::DefPrimTy(p) => def::DefPrimTy(p),
401 def::DefTyParam(s, index, def_id, n) => def::DefTyParam(s, index, def_id.tr(dcx), n),
402 def::DefUse(did) => def::DefUse(did.tr(dcx)),
403 def::DefUpvar(_, nid1, index, nid2) => {
404 let nid1 = dcx.tr_id(nid1);
405 let nid2 = dcx.tr_id(nid2);
406 let did1 = dcx.tcx.map.local_def_id(nid1);
407 def::DefUpvar(did1, nid1, index, nid2)
409 def::DefStruct(did) => def::DefStruct(did.tr(dcx)),
410 def::DefLabel(nid) => def::DefLabel(dcx.tr_id(nid)),
411 def::DefErr => def::DefErr,
416 // ______________________________________________________________________
417 // Encoding and decoding of freevar information
419 fn encode_freevar_entry(rbml_w: &mut Encoder, fv: &ty::Freevar) {
420 (*fv).encode(rbml_w).unwrap();
423 trait rbml_decoder_helper {
424 fn read_freevar_entry(&mut self, dcx: &DecodeContext)
426 fn read_capture_mode(&mut self) -> hir::CaptureClause;
429 impl<'a> rbml_decoder_helper for reader::Decoder<'a> {
430 fn read_freevar_entry(&mut self, dcx: &DecodeContext)
432 let fv: ty::Freevar = Decodable::decode(self).unwrap();
436 fn read_capture_mode(&mut self) -> hir::CaptureClause {
437 let cm: hir::CaptureClause = Decodable::decode(self).unwrap();
442 impl tr for ty::Freevar {
443 fn tr(&self, dcx: &DecodeContext) -> ty::Freevar {
445 def: self.def.tr(dcx),
446 span: self.span.tr(dcx),
451 // ______________________________________________________________________
452 // Encoding and decoding of MethodCallee
454 trait read_method_callee_helper<'tcx> {
455 fn read_method_callee<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
456 -> (u32, ty::MethodCallee<'tcx>);
459 fn encode_method_callee<'a, 'tcx>(ecx: &e::EncodeContext<'a, 'tcx>,
460 rbml_w: &mut Encoder,
462 method: &ty::MethodCallee<'tcx>) {
463 use serialize::Encoder;
465 rbml_w.emit_struct("MethodCallee", 4, |rbml_w| {
466 rbml_w.emit_struct_field("autoderef", 0, |rbml_w| {
467 autoderef.encode(rbml_w)
469 rbml_w.emit_struct_field("def_id", 1, |rbml_w| {
470 Ok(rbml_w.emit_def_id(method.def_id))
472 rbml_w.emit_struct_field("ty", 2, |rbml_w| {
473 Ok(rbml_w.emit_ty(ecx, method.ty))
475 rbml_w.emit_struct_field("substs", 3, |rbml_w| {
476 Ok(rbml_w.emit_substs(ecx, &method.substs))
481 impl<'a, 'tcx> read_method_callee_helper<'tcx> for reader::Decoder<'a> {
482 fn read_method_callee<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
483 -> (u32, ty::MethodCallee<'tcx>) {
485 self.read_struct("MethodCallee", 4, |this| {
486 let autoderef = this.read_struct_field("autoderef", 0,
487 Decodable::decode).unwrap();
488 Ok((autoderef, ty::MethodCallee {
489 def_id: this.read_struct_field("def_id", 1, |this| {
490 Ok(this.read_def_id(dcx))
492 ty: this.read_struct_field("ty", 2, |this| {
493 Ok(this.read_ty(dcx))
495 substs: this.read_struct_field("substs", 3, |this| {
496 Ok(dcx.tcx.mk_substs(this.read_substs(dcx)))
503 pub fn encode_cast_kind(ebml_w: &mut Encoder, kind: cast::CastKind) {
504 kind.encode(ebml_w).unwrap();
507 // ______________________________________________________________________
508 // Encoding and decoding the side tables
510 trait get_ty_str_ctxt<'tcx> {
511 fn ty_str_ctxt<'a>(&'a self) -> tyencode::ctxt<'a, 'tcx>;
514 impl<'a, 'tcx> get_ty_str_ctxt<'tcx> for e::EncodeContext<'a, 'tcx> {
515 fn ty_str_ctxt<'b>(&'b self) -> tyencode::ctxt<'b, 'tcx> {
517 diag: self.tcx.sess.diagnostic(),
518 ds: e::def_to_string,
520 abbrevs: &self.type_abbrevs
525 trait rbml_writer_helpers<'tcx> {
526 fn emit_region(&mut self, ecx: &e::EncodeContext, r: ty::Region);
527 fn emit_ty<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, ty: Ty<'tcx>);
528 fn emit_tys<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>, tys: &[Ty<'tcx>]);
529 fn emit_predicate<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
530 predicate: &ty::Predicate<'tcx>);
531 fn emit_trait_ref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
532 ty: &ty::TraitRef<'tcx>);
533 fn emit_substs<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
534 substs: &subst::Substs<'tcx>);
535 fn emit_existential_bounds<'b>(&mut self, ecx: &e::EncodeContext<'b,'tcx>,
536 bounds: &ty::ExistentialBounds<'tcx>);
537 fn emit_builtin_bounds(&mut self, ecx: &e::EncodeContext, bounds: &ty::BuiltinBounds);
538 fn emit_upvar_capture(&mut self, ecx: &e::EncodeContext, capture: &ty::UpvarCapture);
539 fn emit_auto_adjustment<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
540 adj: &adjustment::AutoAdjustment<'tcx>);
541 fn emit_autoref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
542 autoref: &adjustment::AutoRef<'tcx>);
543 fn emit_auto_deref_ref<'a>(&mut self, ecx: &e::EncodeContext<'a, 'tcx>,
544 auto_deref_ref: &adjustment::AutoDerefRef<'tcx>);
547 impl<'a, 'tcx> rbml_writer_helpers<'tcx> for Encoder<'a> {
548 fn emit_region(&mut self, ecx: &e::EncodeContext, r: ty::Region) {
549 self.emit_opaque(|this| Ok(e::write_region(ecx, this, r)));
552 fn emit_ty<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, ty: Ty<'tcx>) {
553 self.emit_opaque(|this| Ok(e::write_type(ecx, this, ty)));
556 fn emit_tys<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>, tys: &[Ty<'tcx>]) {
557 self.emit_from_vec(tys, |this, ty| Ok(this.emit_ty(ecx, *ty)));
560 fn emit_trait_ref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
561 trait_ref: &ty::TraitRef<'tcx>) {
562 self.emit_opaque(|this| Ok(e::write_trait_ref(ecx, this, trait_ref)));
565 fn emit_predicate<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
566 predicate: &ty::Predicate<'tcx>) {
567 self.emit_opaque(|this| {
568 Ok(tyencode::enc_predicate(this,
574 fn emit_existential_bounds<'b>(&mut self, ecx: &e::EncodeContext<'b,'tcx>,
575 bounds: &ty::ExistentialBounds<'tcx>) {
576 self.emit_opaque(|this| Ok(tyencode::enc_existential_bounds(this,
581 fn emit_builtin_bounds(&mut self, ecx: &e::EncodeContext, bounds: &ty::BuiltinBounds) {
582 self.emit_opaque(|this| Ok(tyencode::enc_builtin_bounds(this,
587 fn emit_upvar_capture(&mut self, ecx: &e::EncodeContext, capture: &ty::UpvarCapture) {
588 use serialize::Encoder;
590 self.emit_enum("UpvarCapture", |this| {
592 ty::UpvarCapture::ByValue => {
593 this.emit_enum_variant("ByValue", 1, 0, |_| Ok(()))
595 ty::UpvarCapture::ByRef(ty::UpvarBorrow { kind, region }) => {
596 this.emit_enum_variant("ByRef", 2, 0, |this| {
597 this.emit_enum_variant_arg(0,
598 |this| kind.encode(this));
599 this.emit_enum_variant_arg(1,
600 |this| Ok(this.emit_region(ecx, region)))
607 fn emit_substs<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
608 substs: &subst::Substs<'tcx>) {
609 self.emit_opaque(|this| Ok(tyencode::enc_substs(this,
614 fn emit_auto_adjustment<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
615 adj: &adjustment::AutoAdjustment<'tcx>) {
616 use serialize::Encoder;
618 self.emit_enum("AutoAdjustment", |this| {
620 adjustment::AdjustReifyFnPointer=> {
621 this.emit_enum_variant("AdjustReifyFnPointer", 1, 0, |_| Ok(()))
624 adjustment::AdjustUnsafeFnPointer => {
625 this.emit_enum_variant("AdjustUnsafeFnPointer", 2, 0, |_| {
630 adjustment::AdjustDerefRef(ref auto_deref_ref) => {
631 this.emit_enum_variant("AdjustDerefRef", 3, 2, |this| {
632 this.emit_enum_variant_arg(0,
633 |this| Ok(this.emit_auto_deref_ref(ecx, auto_deref_ref)))
640 fn emit_autoref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
641 autoref: &adjustment::AutoRef<'tcx>) {
642 use serialize::Encoder;
644 self.emit_enum("AutoRef", |this| {
646 &adjustment::AutoPtr(r, m) => {
647 this.emit_enum_variant("AutoPtr", 0, 2, |this| {
648 this.emit_enum_variant_arg(0,
649 |this| Ok(this.emit_region(ecx, *r)));
650 this.emit_enum_variant_arg(1, |this| m.encode(this))
653 &adjustment::AutoUnsafe(m) => {
654 this.emit_enum_variant("AutoUnsafe", 1, 1, |this| {
655 this.emit_enum_variant_arg(0, |this| m.encode(this))
662 fn emit_auto_deref_ref<'b>(&mut self, ecx: &e::EncodeContext<'b, 'tcx>,
663 auto_deref_ref: &adjustment::AutoDerefRef<'tcx>) {
664 use serialize::Encoder;
666 self.emit_struct("AutoDerefRef", 2, |this| {
667 this.emit_struct_field("autoderefs", 0, |this| auto_deref_ref.autoderefs.encode(this));
669 this.emit_struct_field("autoref", 1, |this| {
670 this.emit_option(|this| {
671 match auto_deref_ref.autoref {
672 None => this.emit_option_none(),
673 Some(ref a) => this.emit_option_some(|this| Ok(this.emit_autoref(ecx, a))),
678 this.emit_struct_field("unsize", 2, |this| {
679 this.emit_option(|this| {
680 match auto_deref_ref.unsize {
681 None => this.emit_option_none(),
682 Some(target) => this.emit_option_some(|this| {
683 Ok(this.emit_ty(ecx, target))
692 trait write_tag_and_id {
693 fn tag<F>(&mut self, tag_id: c::astencode_tag, f: F) where F: FnOnce(&mut Self);
694 fn id(&mut self, id: ast::NodeId);
697 impl<'a> write_tag_and_id for Encoder<'a> {
699 tag_id: c::astencode_tag,
701 F: FnOnce(&mut Encoder<'a>),
703 self.start_tag(tag_id as usize);
708 fn id(&mut self, id: ast::NodeId) {
709 id.encode(self).unwrap();
713 struct SideTableEncodingIdVisitor<'a, 'b:'a, 'c:'a, 'tcx:'c> {
714 ecx: &'a e::EncodeContext<'c, 'tcx>,
715 rbml_w: &'a mut Encoder<'b>,
718 impl<'a, 'b, 'c, 'tcx> ast_util::IdVisitingOperation for
719 SideTableEncodingIdVisitor<'a, 'b, 'c, 'tcx> {
720 fn visit_id(&mut self, id: ast::NodeId) {
721 encode_side_tables_for_id(self.ecx, self.rbml_w, id)
725 fn encode_side_tables_for_ii(ecx: &e::EncodeContext,
726 rbml_w: &mut Encoder,
728 rbml_w.start_tag(c::tag_table as usize);
729 ii.visit_ids(&mut SideTableEncodingIdVisitor {
736 fn encode_side_tables_for_id(ecx: &e::EncodeContext,
737 rbml_w: &mut Encoder,
741 debug!("Encoding side tables for id {}", id);
743 if let Some(def) = tcx.def_map.borrow().get(&id).map(|d| d.full_def()) {
744 rbml_w.tag(c::tag_table_def, |rbml_w| {
746 def.encode(rbml_w).unwrap();
750 if let Some(ty) = tcx.node_types().get(&id) {
751 rbml_w.tag(c::tag_table_node_type, |rbml_w| {
753 rbml_w.emit_ty(ecx, *ty);
757 if let Some(item_substs) = tcx.tables.borrow().item_substs.get(&id) {
758 rbml_w.tag(c::tag_table_item_subst, |rbml_w| {
760 rbml_w.emit_substs(ecx, &item_substs.substs);
764 if let Some(fv) = tcx.freevars.borrow().get(&id) {
765 rbml_w.tag(c::tag_table_freevars, |rbml_w| {
767 rbml_w.emit_from_vec(fv, |rbml_w, fv_entry| {
768 Ok(encode_freevar_entry(rbml_w, fv_entry))
773 rbml_w.tag(c::tag_table_upvar_capture_map, |rbml_w| {
776 let var_id = freevar.def.var_id();
777 let upvar_id = ty::UpvarId {
781 let upvar_capture = tcx.tables
787 var_id.encode(rbml_w);
788 rbml_w.emit_upvar_capture(ecx, &upvar_capture);
793 let method_call = ty::MethodCall::expr(id);
794 if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) {
795 rbml_w.tag(c::tag_table_method_map, |rbml_w| {
797 encode_method_callee(ecx, rbml_w, method_call.autoderef, method)
801 if let Some(adjustment) = tcx.tables.borrow().adjustments.get(&id) {
803 adjustment::AdjustDerefRef(ref adj) => {
804 for autoderef in 0..adj.autoderefs {
805 let method_call = ty::MethodCall::autoderef(id, autoderef as u32);
806 if let Some(method) = tcx.tables.borrow().method_map.get(&method_call) {
807 rbml_w.tag(c::tag_table_method_map, |rbml_w| {
809 encode_method_callee(ecx, rbml_w,
810 method_call.autoderef, method)
818 rbml_w.tag(c::tag_table_adjustments, |rbml_w| {
820 rbml_w.emit_auto_adjustment(ecx, adjustment);
824 if let Some(cast_kind) = tcx.cast_kinds.borrow().get(&id) {
825 rbml_w.tag(c::tag_table_cast_kinds, |rbml_w| {
827 encode_cast_kind(rbml_w, *cast_kind)
831 if let Some(qualif) = tcx.const_qualif_map.borrow().get(&id) {
832 rbml_w.tag(c::tag_table_const_qualif, |rbml_w| {
834 qualif.encode(rbml_w).unwrap()
839 trait doc_decoder_helpers: Sized {
840 fn as_int(&self) -> isize;
841 fn opt_child(&self, tag: c::astencode_tag) -> Option<Self>;
844 impl<'a> doc_decoder_helpers for rbml::Doc<'a> {
845 fn as_int(&self) -> isize { reader::doc_as_u64(*self) as isize }
846 fn opt_child(&self, tag: c::astencode_tag) -> Option<rbml::Doc<'a>> {
847 reader::maybe_get_doc(*self, tag as usize)
851 trait rbml_decoder_decoder_helpers<'tcx> {
852 fn read_ty_encoded<'a, 'b, F, R>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>,
854 where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x, 'tcx>) -> R;
856 fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region;
857 fn read_ty<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Ty<'tcx>;
858 fn read_tys<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>) -> Vec<Ty<'tcx>>;
859 fn read_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
860 -> ty::TraitRef<'tcx>;
861 fn read_poly_trait_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
862 -> ty::PolyTraitRef<'tcx>;
863 fn read_predicate<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
864 -> ty::Predicate<'tcx>;
865 fn read_existential_bounds<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
866 -> ty::ExistentialBounds<'tcx>;
867 fn read_substs<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
868 -> subst::Substs<'tcx>;
869 fn read_upvar_capture(&mut self, dcx: &DecodeContext)
871 fn read_auto_adjustment<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
872 -> adjustment::AutoAdjustment<'tcx>;
873 fn read_cast_kind<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
875 fn read_auto_deref_ref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
876 -> adjustment::AutoDerefRef<'tcx>;
877 fn read_autoref<'a, 'b>(&mut self, dcx: &DecodeContext<'a, 'b, 'tcx>)
878 -> adjustment::AutoRef<'tcx>;
879 fn convert_def_id(&mut self,
884 // Versions of the type reading functions that don't need the full
886 fn read_ty_nodcx(&mut self,
887 tcx: &ty::ctxt<'tcx>, cdata: &cstore::crate_metadata) -> Ty<'tcx>;
888 fn read_tys_nodcx(&mut self,
889 tcx: &ty::ctxt<'tcx>,
890 cdata: &cstore::crate_metadata) -> Vec<Ty<'tcx>>;
891 fn read_substs_nodcx(&mut self, tcx: &ty::ctxt<'tcx>,
892 cdata: &cstore::crate_metadata)
893 -> subst::Substs<'tcx>;
896 impl<'a, 'tcx> rbml_decoder_decoder_helpers<'tcx> for reader::Decoder<'a> {
897 fn read_ty_nodcx(&mut self,
898 tcx: &ty::ctxt<'tcx>,
899 cdata: &cstore::crate_metadata)
901 self.read_opaque(|_, doc| {
903 tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc,
904 &mut |id| decoder::translate_def_id(cdata, id))
909 fn read_tys_nodcx(&mut self,
910 tcx: &ty::ctxt<'tcx>,
911 cdata: &cstore::crate_metadata) -> Vec<Ty<'tcx>> {
912 self.read_to_vec(|this| Ok(this.read_ty_nodcx(tcx, cdata)) )
918 fn read_substs_nodcx(&mut self,
919 tcx: &ty::ctxt<'tcx>,
920 cdata: &cstore::crate_metadata)
921 -> subst::Substs<'tcx>
923 self.read_opaque(|_, doc| {
925 tydecode::TyDecoder::with_doc(tcx, cdata.cnum, doc,
926 &mut |id| decoder::translate_def_id(cdata, id))
931 fn read_ty_encoded<'b, 'c, F, R>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>, op: F) -> R
932 where F: for<'x> FnOnce(&mut tydecode::TyDecoder<'x,'tcx>) -> R
934 return self.read_opaque(|this, doc| {
935 debug!("read_ty_encoded({})", type_string(doc));
937 &mut tydecode::TyDecoder::with_doc(
938 dcx.tcx, dcx.cdata.cnum, doc,
939 &mut |a| this.convert_def_id(dcx, a))))
942 fn type_string(doc: rbml::Doc) -> String {
943 let mut str = String::new();
944 for i in doc.start..doc.end {
945 str.push(doc.data[i] as char);
950 fn read_region(&mut self, dcx: &DecodeContext) -> ty::Region {
951 // Note: regions types embed local node ids. In principle, we
952 // should translate these node ids into the new decode
953 // context. However, we do not bother, because region types
954 // are not used during trans. This also applies to read_ty.
955 return self.read_ty_encoded(dcx, |decoder| decoder.parse_region());
957 fn read_ty<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>) -> Ty<'tcx> {
958 return self.read_ty_encoded(dcx, |decoder| decoder.parse_ty());
961 fn read_tys<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
963 self.read_to_vec(|this| Ok(this.read_ty(dcx))).unwrap().into_iter().collect()
966 fn read_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
967 -> ty::TraitRef<'tcx> {
968 self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref())
971 fn read_poly_trait_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
972 -> ty::PolyTraitRef<'tcx> {
973 ty::Binder(self.read_ty_encoded(dcx, |decoder| decoder.parse_trait_ref()))
976 fn read_predicate<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
977 -> ty::Predicate<'tcx>
979 self.read_ty_encoded(dcx, |decoder| decoder.parse_predicate())
982 fn read_existential_bounds<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
983 -> ty::ExistentialBounds<'tcx>
985 self.read_ty_encoded(dcx, |decoder| decoder.parse_existential_bounds())
988 fn read_substs<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
989 -> subst::Substs<'tcx> {
990 self.read_opaque(|this, doc| {
991 Ok(tydecode::TyDecoder::with_doc(dcx.tcx, dcx.cdata.cnum, doc,
992 &mut |a| this.convert_def_id(dcx, a))
996 fn read_upvar_capture(&mut self, dcx: &DecodeContext) -> ty::UpvarCapture {
997 self.read_enum("UpvarCapture", |this| {
998 let variants = ["ByValue", "ByRef"];
999 this.read_enum_variant(&variants, |this, i| {
1001 1 => ty::UpvarCapture::ByValue,
1002 2 => ty::UpvarCapture::ByRef(ty::UpvarBorrow {
1003 kind: this.read_enum_variant_arg(0,
1004 |this| Decodable::decode(this)).unwrap(),
1005 region: this.read_enum_variant_arg(1,
1006 |this| Ok(this.read_region(dcx))).unwrap()
1008 _ => panic!("bad enum variant for ty::UpvarCapture")
1013 fn read_auto_adjustment<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1014 -> adjustment::AutoAdjustment<'tcx> {
1015 self.read_enum("AutoAdjustment", |this| {
1016 let variants = ["AdjustReifyFnPointer", "AdjustUnsafeFnPointer", "AdjustDerefRef"];
1017 this.read_enum_variant(&variants, |this, i| {
1019 1 => adjustment::AdjustReifyFnPointer,
1020 2 => adjustment::AdjustUnsafeFnPointer,
1022 let auto_deref_ref: adjustment::AutoDerefRef =
1023 this.read_enum_variant_arg(0,
1024 |this| Ok(this.read_auto_deref_ref(dcx))).unwrap();
1026 adjustment::AdjustDerefRef(auto_deref_ref)
1028 _ => panic!("bad enum variant for adjustment::AutoAdjustment")
1034 fn read_auto_deref_ref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1035 -> adjustment::AutoDerefRef<'tcx> {
1036 self.read_struct("AutoDerefRef", 2, |this| {
1037 Ok(adjustment::AutoDerefRef {
1038 autoderefs: this.read_struct_field("autoderefs", 0, |this| {
1039 Decodable::decode(this)
1041 autoref: this.read_struct_field("autoref", 1, |this| {
1042 this.read_option(|this, b| {
1044 Ok(Some(this.read_autoref(dcx)))
1050 unsize: this.read_struct_field("unsize", 2, |this| {
1051 this.read_option(|this, b| {
1053 Ok(Some(this.read_ty(dcx)))
1063 fn read_autoref<'b, 'c>(&mut self, dcx: &DecodeContext<'b, 'c, 'tcx>)
1064 -> adjustment::AutoRef<'tcx> {
1065 self.read_enum("AutoRef", |this| {
1066 let variants = ["AutoPtr", "AutoUnsafe"];
1067 this.read_enum_variant(&variants, |this, i| {
1071 this.read_enum_variant_arg(0, |this| {
1072 Ok(this.read_region(dcx))
1074 let m: hir::Mutability =
1075 this.read_enum_variant_arg(1, |this| {
1076 Decodable::decode(this)
1079 adjustment::AutoPtr(dcx.tcx.mk_region(r), m)
1082 let m: hir::Mutability =
1083 this.read_enum_variant_arg(0, |this| Decodable::decode(this)).unwrap();
1085 adjustment::AutoUnsafe(m)
1087 _ => panic!("bad enum variant for adjustment::AutoRef")
1093 fn read_cast_kind<'b, 'c>(&mut self, _dcx: &DecodeContext<'b, 'c, 'tcx>)
1096 Decodable::decode(self).unwrap()
1099 /// Converts a def-id that appears in a type. The correct
1100 /// translation will depend on what kind of def-id this is.
1101 /// This is a subtle point: type definitions are not
1102 /// inlined into the current crate, so if the def-id names
1103 /// a nominal type or type alias, then it should be
1104 /// translated to refer to the source crate.
1106 /// However, *type parameters* are cloned along with the function
1107 /// they are attached to. So we should translate those def-ids
1108 /// to refer to the new, cloned copy of the type parameter.
1109 /// We only see references to free type parameters in the body of
1110 /// an inlined function. In such cases, we need the def-id to
1111 /// be a local id so that the TypeContents code is able to lookup
1112 /// the relevant info in the ty_param_defs table.
1114 /// *Region parameters*, unfortunately, are another kettle of fish.
1115 /// In such cases, def_id's can appear in types to distinguish
1116 /// shadowed bound regions and so forth. It doesn't actually
1117 /// matter so much what we do to these, since regions are erased
1118 /// at trans time, but it's good to keep them consistent just in
1119 /// case. We translate them with `tr_def_id()` which will map
1120 /// the crate numbers back to the original source crate.
1122 /// Scopes will end up as being totally bogus. This can actually
1123 /// be fixed though.
1125 /// Unboxed closures are cloned along with the function being
1126 /// inlined, and all side tables use interned node IDs, so we
1127 /// translate their def IDs accordingly.
1129 /// It'd be really nice to refactor the type repr to not include
1130 /// def-ids so that all these distinctions were unnecessary.
1131 fn convert_def_id(&mut self,
1132 dcx: &DecodeContext,
1135 let r = dcx.tr_def_id(did);
1136 debug!("convert_def_id(did={:?})={:?}", did, r);
1141 fn decode_side_tables(dcx: &DecodeContext,
1142 ast_doc: rbml::Doc) {
1143 let tbl_doc = ast_doc.get(c::tag_table as usize);
1144 for (tag, entry_doc) in reader::docs(tbl_doc) {
1145 let mut entry_dsr = reader::Decoder::new(entry_doc);
1146 let id0: ast::NodeId = Decodable::decode(&mut entry_dsr).unwrap();
1147 let id = dcx.tr_id(id0);
1149 debug!(">> Side table document with tag 0x{:x} \
1150 found for id {} (orig {})",
1152 let tag = tag as u32;
1153 let decoded_tag: Option<c::astencode_tag> = c::astencode_tag::from_u32(tag);
1157 &format!("unknown tag found in side tables: {:x}",
1161 let val_dsr = &mut entry_dsr;
1164 c::tag_table_def => {
1165 let def = decode_def(dcx, val_dsr);
1166 dcx.tcx.def_map.borrow_mut().insert(id, def::PathResolution {
1168 // This doesn't matter cross-crate.
1169 last_private: LastMod(AllPublic),
1173 c::tag_table_node_type => {
1174 let ty = val_dsr.read_ty(dcx);
1175 debug!("inserting ty for node {}: {:?}",
1177 dcx.tcx.node_type_insert(id, ty);
1179 c::tag_table_item_subst => {
1180 let item_substs = ty::ItemSubsts {
1181 substs: val_dsr.read_substs(dcx)
1183 dcx.tcx.tables.borrow_mut().item_substs.insert(
1186 c::tag_table_freevars => {
1187 let fv_info = val_dsr.read_to_vec(|val_dsr| {
1188 Ok(val_dsr.read_freevar_entry(dcx))
1189 }).unwrap().into_iter().collect();
1190 dcx.tcx.freevars.borrow_mut().insert(id, fv_info);
1192 c::tag_table_upvar_capture_map => {
1193 let var_id: ast::NodeId = Decodable::decode(val_dsr).unwrap();
1194 let upvar_id = ty::UpvarId {
1195 var_id: dcx.tr_id(var_id),
1198 let ub = val_dsr.read_upvar_capture(dcx);
1199 dcx.tcx.tables.borrow_mut().upvar_capture_map.insert(upvar_id, ub);
1201 c::tag_table_method_map => {
1202 let (autoderef, method) = val_dsr.read_method_callee(dcx);
1203 let method_call = ty::MethodCall {
1205 autoderef: autoderef
1207 dcx.tcx.tables.borrow_mut().method_map.insert(method_call, method);
1209 c::tag_table_adjustments => {
1211 val_dsr.read_auto_adjustment(dcx);
1212 dcx.tcx.tables.borrow_mut().adjustments.insert(id, adj);
1214 c::tag_table_cast_kinds => {
1216 val_dsr.read_cast_kind(dcx);
1217 dcx.tcx.cast_kinds.borrow_mut().insert(id, cast_kind);
1219 c::tag_table_const_qualif => {
1220 let qualif: ConstQualif = Decodable::decode(val_dsr).unwrap();
1221 dcx.tcx.const_qualif_map.borrow_mut().insert(id, qualif);
1225 &format!("unknown tag found in side tables: {:x}",
1232 debug!(">< Side table doc loaded");
1236 // copy the tcache entries from the original item to the new
1238 fn copy_item_types(dcx: &DecodeContext, ii: &InlinedItem, orig_did: DefId) {
1239 fn copy_item_type(dcx: &DecodeContext,
1240 inlined_id: ast::NodeId,
1241 remote_did: DefId) {
1242 let inlined_did = dcx.tcx.map.local_def_id(inlined_id);
1243 dcx.tcx.register_item_type(inlined_did,
1244 dcx.tcx.lookup_item_type(remote_did));
1247 // copy the entry for the item itself
1248 let item_node_id = match ii {
1249 &InlinedItem::Item(ref i) => i.id,
1250 &InlinedItem::TraitItem(_, ref ti) => ti.id,
1251 &InlinedItem::ImplItem(_, ref ii) => ii.id,
1252 &InlinedItem::Foreign(ref fi) => fi.id
1254 copy_item_type(dcx, item_node_id, orig_did);
1256 // copy the entries of inner items
1257 if let &InlinedItem::Item(ref item) = ii {
1259 hir::ItemEnum(ref def, _) => {
1260 let orig_def = dcx.tcx.lookup_adt_def(orig_did);
1261 for (i_variant, orig_variant) in
1262 def.variants.iter().zip(orig_def.variants.iter())
1264 debug!("astencode: copying variant {:?} => {:?}",
1265 orig_variant.did, i_variant.node.data.id());
1266 copy_item_type(dcx, i_variant.node.data.id(), orig_variant.did);
1269 hir::ItemStruct(ref def, _) => {
1270 if !def.is_struct() {
1271 let ctor_did = dcx.tcx.lookup_adt_def(orig_did)
1272 .struct_variant().did;
1273 debug!("astencode: copying ctor {:?} => {:?}", ctor_did,
1275 copy_item_type(dcx, def.id(), ctor_did);
1283 fn inlined_item_id_range(v: &InlinedItem) -> ast_util::IdRange {
1284 let mut visitor = ast_util::IdRangeComputingVisitor::new();
1285 v.visit_ids(&mut visitor);
1289 // ______________________________________________________________________
1290 // Testing of astencode_gen
1293 fn encode_item_ast(rbml_w: &mut Encoder, item: &hir::Item) {
1294 rbml_w.start_tag(c::tag_tree as usize);
1295 (*item).encode(rbml_w);
1300 fn decode_item_ast(par_doc: rbml::Doc) -> hir::Item {
1301 let chi_doc = par_doc.get(c::tag_tree as usize);
1302 let mut d = reader::Decoder::new(chi_doc);
1303 Decodable::decode(&mut d).unwrap()
1308 fn call_site(&self) -> codemap::Span;
1309 fn cfg(&self) -> ast::CrateConfig;
1310 fn ident_of(&self, st: &str) -> ast::Ident;
1311 fn name_of(&self, st: &str) -> ast::Name;
1312 fn parse_sess(&self) -> &parse::ParseSess;
1316 impl FakeExtCtxt for parse::ParseSess {
1317 fn call_site(&self) -> codemap::Span {
1319 lo: codemap::BytePos(0),
1320 hi: codemap::BytePos(0),
1321 expn_id: codemap::NO_EXPANSION,
1324 fn cfg(&self) -> ast::CrateConfig { Vec::new() }
1325 fn ident_of(&self, st: &str) -> ast::Ident {
1326 parse::token::str_to_ident(st)
1328 fn name_of(&self, st: &str) -> ast::Name {
1329 parse::token::intern(st)
1331 fn parse_sess(&self) -> &parse::ParseSess { self }
1335 struct FakeNodeIdAssigner;
1338 // It should go without saying that this may give unexpected results. Avoid
1339 // lowering anything which needs new nodes.
1340 impl NodeIdAssigner for FakeNodeIdAssigner {
1341 fn next_node_id(&self) -> NodeId {
1345 fn peek_node_id(&self) -> NodeId {
1351 fn mk_ctxt() -> parse::ParseSess {
1352 parse::ParseSess::new()
1356 fn roundtrip(in_item: hir::Item) {
1357 let mut wr = Cursor::new(Vec::new());
1358 encode_item_ast(&mut Encoder::new(&mut wr), &in_item);
1359 let rbml_doc = rbml::Doc::new(wr.get_ref());
1360 let out_item = decode_item_ast(rbml_doc);
1362 assert!(in_item == out_item);
1368 let fnia = FakeNodeIdAssigner;
1369 let lcx = LoweringContext::new(&fnia, None);
1370 roundtrip(lower_item(&lcx, "e_item!(&cx,
1376 fn test_smalltalk() {
1378 let fnia = FakeNodeIdAssigner;
1379 let lcx = LoweringContext::new(&fnia, None);
1380 roundtrip(lower_item(&lcx, "e_item!(&cx,
1381 fn foo() -> isize { 3 + 4 } // first smalltalk program ever executed.
1388 let fnia = FakeNodeIdAssigner;
1389 let lcx = LoweringContext::new(&fnia, None);
1390 roundtrip(lower_item(&lcx, "e_item!(&cx,
1391 fn foo(x: usize, y: usize) -> usize {
1399 fn test_simplification() {
1401 let item = quote_item!(&cx,
1402 fn new_int_alist<B>() -> alist<isize, B> {
1403 fn eq_int(a: isize, b: isize) -> bool { a == b }
1404 return alist {eq_fn: eq_int, data: Vec::new()};
1407 let fnia = FakeNodeIdAssigner;
1408 let lcx = LoweringContext::new(&fnia, None);
1409 let hir_item = lower_item(&lcx, &item);
1410 let item_in = InlinedItemRef::Item(&hir_item);
1411 let item_out = simplify_ast(item_in);
1412 let item_exp = InlinedItem::Item(P(lower_item(&lcx, "e_item!(&cx,
1413 fn new_int_alist<B>() -> alist<isize, B> {
1414 return alist {eq_fn: eq_int, data: Vec::new()};
1417 match (item_out, item_exp) {
1418 (InlinedItem::Item(item_out), InlinedItem::Item(item_exp)) => {
1419 assert!(pprust::item_to_string(&*item_out) ==
1420 pprust::item_to_string(&*item_exp));