1 // Copyright 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.
17 use middle::cstore::{InlinedItem, CrateStore, CrateSource, ChildItem, ExternCrate, DefLike};
18 use middle::cstore::{NativeLibraryKind, LinkMeta, LinkagePreference};
20 use middle::lang_items;
21 use rustc::ty::{self, Ty, TyCtxt, VariantKind};
22 use rustc::hir::def_id::{DefId, DefIndex, CRATE_DEF_INDEX};
24 use rustc::dep_graph::DepNode;
25 use rustc::hir::map as hir_map;
26 use rustc::hir::map::DefKey;
27 use rustc::mir::repr::Mir;
28 use rustc::mir::mir_map::MirMap;
29 use rustc::util::nodemap::{FnvHashMap, NodeSet, DefIdMap};
30 use rustc::session::config::PanicStrategy;
32 use std::cell::RefCell;
34 use std::path::PathBuf;
37 use syntax::parse::token;
38 use rustc::hir::svh::Svh;
39 use rustc_back::target::Target;
42 impl<'tcx> CrateStore<'tcx> for cstore::CStore {
43 fn stability(&self, def: DefId) -> Option<attr::Stability> {
44 self.dep_graph.read(DepNode::MetaData(def));
45 let cdata = self.get_crate_data(def.krate);
46 decoder::get_stability(&cdata, def.index)
49 fn deprecation(&self, def: DefId) -> Option<attr::Deprecation> {
50 self.dep_graph.read(DepNode::MetaData(def));
51 let cdata = self.get_crate_data(def.krate);
52 decoder::get_deprecation(&cdata, def.index)
55 fn visibility(&self, def: DefId) -> ty::Visibility {
56 self.dep_graph.read(DepNode::MetaData(def));
57 let cdata = self.get_crate_data(def.krate);
58 decoder::get_visibility(&cdata, def.index)
61 fn closure_kind(&self, def_id: DefId) -> ty::ClosureKind
63 assert!(!def_id.is_local());
64 self.dep_graph.read(DepNode::MetaData(def_id));
65 let cdata = self.get_crate_data(def_id.krate);
66 decoder::closure_kind(&cdata, def_id.index)
69 fn closure_ty<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> ty::ClosureTy<'tcx> {
70 assert!(!def_id.is_local());
71 self.dep_graph.read(DepNode::MetaData(def_id));
72 let cdata = self.get_crate_data(def_id.krate);
73 decoder::closure_ty(&cdata, def_id.index, tcx)
76 fn item_variances(&self, def: DefId) -> ty::ItemVariances {
77 self.dep_graph.read(DepNode::MetaData(def));
78 let cdata = self.get_crate_data(def.krate);
79 decoder::get_item_variances(&cdata, def.index)
82 fn repr_attrs(&self, def: DefId) -> Vec<attr::ReprAttr> {
83 self.dep_graph.read(DepNode::MetaData(def));
84 let cdata = self.get_crate_data(def.krate);
85 decoder::get_repr_attrs(&cdata, def.index)
88 fn item_type<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
89 -> ty::TypeScheme<'tcx>
91 self.dep_graph.read(DepNode::MetaData(def));
92 let cdata = self.get_crate_data(def.krate);
93 decoder::get_type(&cdata, def.index, tcx)
96 fn item_predicates<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
97 -> ty::GenericPredicates<'tcx>
99 self.dep_graph.read(DepNode::MetaData(def));
100 let cdata = self.get_crate_data(def.krate);
101 decoder::get_predicates(&cdata, def.index, tcx)
104 fn item_super_predicates<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
105 -> ty::GenericPredicates<'tcx>
107 self.dep_graph.read(DepNode::MetaData(def));
108 let cdata = self.get_crate_data(def.krate);
109 decoder::get_super_predicates(&cdata, def.index, tcx)
112 fn item_attrs(&self, def_id: DefId) -> Vec<ast::Attribute>
114 self.dep_graph.read(DepNode::MetaData(def_id));
115 let cdata = self.get_crate_data(def_id.krate);
116 decoder::get_item_attrs(&cdata, def_id.index)
119 fn trait_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> ty::TraitDef<'tcx>
121 self.dep_graph.read(DepNode::MetaData(def));
122 let cdata = self.get_crate_data(def.krate);
123 decoder::get_trait_def(&cdata, def.index, tcx)
126 fn adt_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> ty::AdtDefMaster<'tcx>
128 self.dep_graph.read(DepNode::MetaData(def));
129 let cdata = self.get_crate_data(def.krate);
130 decoder::get_adt_def(&cdata, def.index, tcx)
133 fn method_arg_names(&self, did: DefId) -> Vec<String>
135 self.dep_graph.read(DepNode::MetaData(did));
136 let cdata = self.get_crate_data(did.krate);
137 decoder::get_method_arg_names(&cdata, did.index)
140 fn item_name(&self, def: DefId) -> ast::Name {
141 self.dep_graph.read(DepNode::MetaData(def));
142 let cdata = self.get_crate_data(def.krate);
143 decoder::get_item_name(&cdata, def.index)
146 fn opt_item_name(&self, def: DefId) -> Option<ast::Name> {
147 self.dep_graph.read(DepNode::MetaData(def));
148 let cdata = self.get_crate_data(def.krate);
149 decoder::maybe_get_item_name(&cdata, def.index)
152 fn inherent_implementations_for_type(&self, def_id: DefId) -> Vec<DefId>
154 self.dep_graph.read(DepNode::MetaData(def_id));
155 let mut result = vec![];
156 let cdata = self.get_crate_data(def_id.krate);
157 decoder::each_inherent_implementation_for_type(&cdata, def_id.index,
158 |iid| result.push(iid));
162 fn implementations_of_trait(&self, def_id: DefId) -> Vec<DefId>
164 self.dep_graph.read(DepNode::MetaData(def_id));
165 let mut result = vec![];
166 self.iter_crate_data(|_, cdata| {
167 decoder::each_implementation_for_trait(cdata, def_id, &mut |iid| {
174 fn provided_trait_methods<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
175 -> Vec<Rc<ty::Method<'tcx>>>
177 self.dep_graph.read(DepNode::MetaData(def));
178 let cdata = self.get_crate_data(def.krate);
179 decoder::get_provided_trait_methods(&cdata, def.index, tcx)
182 fn trait_item_def_ids(&self, def: DefId)
183 -> Vec<ty::ImplOrTraitItemId>
185 self.dep_graph.read(DepNode::MetaData(def));
186 let cdata = self.get_crate_data(def.krate);
187 decoder::get_trait_item_def_ids(&cdata, def.index)
190 fn impl_items(&self, impl_def_id: DefId) -> Vec<ty::ImplOrTraitItemId>
192 self.dep_graph.read(DepNode::MetaData(impl_def_id));
193 let cdata = self.get_crate_data(impl_def_id.krate);
194 decoder::get_impl_items(&cdata, impl_def_id.index)
197 fn impl_polarity(&self, def: DefId) -> Option<hir::ImplPolarity>
199 self.dep_graph.read(DepNode::MetaData(def));
200 let cdata = self.get_crate_data(def.krate);
201 decoder::get_impl_polarity(&cdata, def.index)
204 fn impl_trait_ref<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
205 -> Option<ty::TraitRef<'tcx>>
207 self.dep_graph.read(DepNode::MetaData(def));
208 let cdata = self.get_crate_data(def.krate);
209 decoder::get_impl_trait(&cdata, def.index, tcx)
212 fn custom_coerce_unsized_kind(&self, def: DefId)
213 -> Option<ty::adjustment::CustomCoerceUnsized>
215 self.dep_graph.read(DepNode::MetaData(def));
216 let cdata = self.get_crate_data(def.krate);
217 decoder::get_custom_coerce_unsized_kind(&cdata, def.index)
221 fn associated_consts<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
222 -> Vec<Rc<ty::AssociatedConst<'tcx>>> {
223 self.dep_graph.read(DepNode::MetaData(def));
224 let cdata = self.get_crate_data(def.krate);
225 decoder::get_associated_consts(&cdata, def.index, tcx)
228 fn impl_parent(&self, impl_def: DefId) -> Option<DefId> {
229 self.dep_graph.read(DepNode::MetaData(impl_def));
230 let cdata = self.get_crate_data(impl_def.krate);
231 decoder::get_parent_impl(&*cdata, impl_def.index)
234 fn trait_of_item<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> Option<DefId>
236 self.dep_graph.read(DepNode::MetaData(def_id));
237 let cdata = self.get_crate_data(def_id.krate);
238 decoder::get_trait_of_item(&cdata, def_id.index, tcx)
241 fn impl_or_trait_item<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
242 -> Option<ty::ImplOrTraitItem<'tcx>>
244 self.dep_graph.read(DepNode::MetaData(def));
245 let cdata = self.get_crate_data(def.krate);
246 decoder::get_impl_or_trait_item(&cdata, def.index, tcx)
249 fn is_const_fn(&self, did: DefId) -> bool
251 self.dep_graph.read(DepNode::MetaData(did));
252 let cdata = self.get_crate_data(did.krate);
253 decoder::is_const_fn(&cdata, did.index)
256 fn is_defaulted_trait(&self, trait_def_id: DefId) -> bool
258 self.dep_graph.read(DepNode::MetaData(trait_def_id));
259 let cdata = self.get_crate_data(trait_def_id.krate);
260 decoder::is_defaulted_trait(&cdata, trait_def_id.index)
263 fn is_impl(&self, did: DefId) -> bool
265 self.dep_graph.read(DepNode::MetaData(did));
266 let cdata = self.get_crate_data(did.krate);
267 decoder::is_impl(&cdata, did.index)
270 fn is_default_impl(&self, impl_did: DefId) -> bool {
271 self.dep_graph.read(DepNode::MetaData(impl_did));
272 let cdata = self.get_crate_data(impl_did.krate);
273 decoder::is_default_impl(&cdata, impl_did.index)
276 fn is_extern_item<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, did: DefId) -> bool {
277 self.dep_graph.read(DepNode::MetaData(did));
278 let cdata = self.get_crate_data(did.krate);
279 decoder::is_extern_item(&cdata, did.index, tcx)
282 fn is_foreign_item(&self, did: DefId) -> bool {
283 let cdata = self.get_crate_data(did.krate);
284 decoder::is_foreign_item(&cdata, did.index)
287 fn is_static_method(&self, def: DefId) -> bool
289 self.dep_graph.read(DepNode::MetaData(def));
290 let cdata = self.get_crate_data(def.krate);
291 decoder::is_static_method(&cdata, def.index)
294 fn is_statically_included_foreign_item(&self, id: ast::NodeId) -> bool
296 self.do_is_statically_included_foreign_item(id)
299 fn is_typedef(&self, did: DefId) -> bool {
300 self.dep_graph.read(DepNode::MetaData(did));
301 let cdata = self.get_crate_data(did.krate);
302 decoder::is_typedef(&cdata, did.index)
305 fn dylib_dependency_formats(&self, cnum: ast::CrateNum)
306 -> Vec<(ast::CrateNum, LinkagePreference)>
308 let cdata = self.get_crate_data(cnum);
309 decoder::get_dylib_dependency_formats(&cdata)
312 fn lang_items(&self, cnum: ast::CrateNum) -> Vec<(DefIndex, usize)>
314 let mut result = vec![];
315 let crate_data = self.get_crate_data(cnum);
316 decoder::each_lang_item(&crate_data, |did, lid| {
317 result.push((did, lid)); true
322 fn missing_lang_items(&self, cnum: ast::CrateNum)
323 -> Vec<lang_items::LangItem>
325 let cdata = self.get_crate_data(cnum);
326 decoder::get_missing_lang_items(&cdata)
329 fn is_staged_api(&self, cnum: ast::CrateNum) -> bool
331 self.get_crate_data(cnum).staged_api
334 fn is_explicitly_linked(&self, cnum: ast::CrateNum) -> bool
336 self.get_crate_data(cnum).explicitly_linked.get()
339 fn is_allocator(&self, cnum: ast::CrateNum) -> bool
341 self.get_crate_data(cnum).is_allocator()
344 fn is_panic_runtime(&self, cnum: ast::CrateNum) -> bool
346 self.get_crate_data(cnum).is_panic_runtime()
349 fn panic_strategy(&self, cnum: ast::CrateNum) -> PanicStrategy {
350 self.get_crate_data(cnum).panic_strategy()
353 fn crate_attrs(&self, cnum: ast::CrateNum) -> Vec<ast::Attribute>
355 decoder::get_crate_attributes(self.get_crate_data(cnum).data())
358 fn crate_name(&self, cnum: ast::CrateNum) -> token::InternedString
360 token::intern_and_get_ident(&self.get_crate_data(cnum).name[..])
363 fn original_crate_name(&self, cnum: ast::CrateNum) -> token::InternedString
365 token::intern_and_get_ident(&self.get_crate_data(cnum).name())
368 fn extern_crate(&self, cnum: ast::CrateNum) -> Option<ExternCrate>
370 self.get_crate_data(cnum).extern_crate.get()
373 fn crate_hash(&self, cnum: ast::CrateNum) -> Svh
375 let cdata = self.get_crate_data(cnum);
376 decoder::get_crate_hash(cdata.data())
379 fn crate_disambiguator(&self, cnum: ast::CrateNum) -> token::InternedString
381 let cdata = self.get_crate_data(cnum);
382 token::intern_and_get_ident(decoder::get_crate_disambiguator(cdata.data()))
385 fn crate_struct_field_attrs(&self, cnum: ast::CrateNum)
386 -> FnvHashMap<DefId, Vec<ast::Attribute>>
388 decoder::get_struct_field_attrs(&self.get_crate_data(cnum))
391 fn plugin_registrar_fn(&self, cnum: ast::CrateNum) -> Option<DefId>
393 let cdata = self.get_crate_data(cnum);
394 decoder::get_plugin_registrar_fn(cdata.data()).map(|index| DefId {
400 fn native_libraries(&self, cnum: ast::CrateNum) -> Vec<(NativeLibraryKind, String)>
402 let cdata = self.get_crate_data(cnum);
403 decoder::get_native_libraries(&cdata)
406 fn reachable_ids(&self, cnum: ast::CrateNum) -> Vec<DefId>
408 let cdata = self.get_crate_data(cnum);
409 decoder::get_reachable_ids(&cdata)
412 fn def_index_for_def_key(&self,
415 -> Option<DefIndex> {
416 let cdata = self.get_crate_data(cnum);
417 cdata.key_map.get(&def).cloned()
420 /// Returns the `DefKey` for a given `DefId`. This indicates the
421 /// parent `DefId` as well as some idea of what kind of data the
422 /// `DefId` refers to.
423 fn def_key(&self, def: DefId) -> hir_map::DefKey {
424 self.dep_graph.read(DepNode::MetaData(def));
425 let cdata = self.get_crate_data(def.krate);
426 decoder::def_key(&cdata, def.index)
429 fn relative_def_path(&self, def: DefId) -> hir_map::DefPath {
430 self.dep_graph.read(DepNode::MetaData(def));
431 let cdata = self.get_crate_data(def.krate);
432 decoder::def_path(&cdata, def.index)
435 fn variant_kind(&self, def_id: DefId) -> Option<VariantKind> {
436 self.dep_graph.read(DepNode::MetaData(def_id));
437 let cdata = self.get_crate_data(def_id.krate);
438 decoder::get_variant_kind(&cdata, def_id.index)
441 fn struct_ctor_def_id(&self, struct_def_id: DefId) -> Option<DefId>
443 self.dep_graph.read(DepNode::MetaData(struct_def_id));
444 let cdata = self.get_crate_data(struct_def_id.krate);
445 decoder::get_struct_ctor_def_id(&cdata, struct_def_id.index)
448 fn tuple_struct_definition_if_ctor(&self, did: DefId) -> Option<DefId>
450 self.dep_graph.read(DepNode::MetaData(did));
451 let cdata = self.get_crate_data(did.krate);
452 decoder::get_tuple_struct_definition_if_ctor(&cdata, did.index)
455 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>
457 self.dep_graph.read(DepNode::MetaData(def));
458 let cdata = self.get_crate_data(def.krate);
459 decoder::get_struct_field_names(&cdata, def.index)
462 fn item_children(&self, def_id: DefId) -> Vec<ChildItem>
464 self.dep_graph.read(DepNode::MetaData(def_id));
465 let mut result = vec![];
466 let crate_data = self.get_crate_data(def_id.krate);
467 let get_crate_data = |cnum| self.get_crate_data(cnum);
468 decoder::each_child_of_item(&crate_data, def_id.index, get_crate_data, |def, name, vis| {
469 result.push(ChildItem { def: def, name: name, vis: vis });
474 fn crate_top_level_items(&self, cnum: ast::CrateNum) -> Vec<ChildItem>
476 let mut result = vec![];
477 let crate_data = self.get_crate_data(cnum);
478 let get_crate_data = |cnum| self.get_crate_data(cnum);
479 decoder::each_top_level_item_of_crate(&crate_data, get_crate_data, |def, name, vis| {
480 result.push(ChildItem { def: def, name: name, vis: vis });
485 fn maybe_get_item_ast<'a>(&'tcx self,
486 tcx: TyCtxt<'a, 'tcx, 'tcx>,
488 -> Option<(&'tcx InlinedItem, ast::NodeId)>
490 self.dep_graph.read(DepNode::MetaData(def_id));
492 match self.inlined_item_cache.borrow().get(&def_id) {
494 return None; // Not inlinable
496 Some(&Some(ref cached_inlined_item)) => {
498 debug!("maybe_get_item_ast({}): already inline as node id {}",
499 tcx.item_path_str(def_id), cached_inlined_item.item_id);
500 return Some((tcx.map.expect_inlined_item(cached_inlined_item.inlined_root),
501 cached_inlined_item.item_id));
508 debug!("maybe_get_item_ast({}): inlining item", tcx.item_path_str(def_id));
510 let cdata = self.get_crate_data(def_id.krate);
511 let inlined = decoder::maybe_get_item_ast(&cdata, tcx, def_id.index);
513 let cache_inlined_item = |original_def_id, inlined_item_id, inlined_root_node_id| {
514 let cache_entry = cstore::CachedInlinedItem {
515 inlined_root: inlined_root_node_id,
516 item_id: inlined_item_id,
518 self.inlined_item_cache
520 .insert(original_def_id, Some(cache_entry));
521 self.defid_for_inlined_node
523 .insert(inlined_item_id, original_def_id);
526 let find_inlined_item_root = |inlined_item_id| {
527 let mut node = inlined_item_id;
528 let mut path = Vec::with_capacity(10);
530 // If we can't find the inline root after a thousand hops, we can
531 // be pretty sure there's something wrong with the HIR map.
534 let parent_node = tcx.map.get_parent_node(node);
535 if parent_node == node {
540 bug!("cycle in HIR map parent chain")
544 decoder::FoundAst::NotFound => {
545 self.inlined_item_cache
547 .insert(def_id, None);
549 decoder::FoundAst::Found(&InlinedItem::Item(d, ref item)) => {
550 assert_eq!(d, def_id);
551 let inlined_root_node_id = find_inlined_item_root(item.id);
552 cache_inlined_item(def_id, item.id, inlined_root_node_id);
554 decoder::FoundAst::Found(&InlinedItem::Foreign(d, ref item)) => {
555 assert_eq!(d, def_id);
556 let inlined_root_node_id = find_inlined_item_root(item.id);
557 cache_inlined_item(def_id, item.id, inlined_root_node_id);
559 decoder::FoundAst::FoundParent(parent_did, item) => {
560 let inlined_root_node_id = find_inlined_item_root(item.id);
561 cache_inlined_item(parent_did, item.id, inlined_root_node_id);
564 hir::ItemEnum(ref ast_def, _) => {
565 let ast_vs = &ast_def.variants;
566 let ty_vs = &tcx.lookup_adt_def(parent_did).variants;
567 assert_eq!(ast_vs.len(), ty_vs.len());
568 for (ast_v, ty_v) in ast_vs.iter().zip(ty_vs.iter()) {
569 cache_inlined_item(ty_v.did,
570 ast_v.node.data.id(),
571 inlined_root_node_id);
574 hir::ItemStruct(ref struct_def, _) => {
575 if struct_def.is_struct() {
576 bug!("instantiate_inline: called on a non-tuple struct")
578 cache_inlined_item(def_id,
580 inlined_root_node_id);
583 _ => bug!("instantiate_inline: item has a \
584 non-enum, non-struct parent")
587 decoder::FoundAst::Found(&InlinedItem::TraitItem(_, ref trait_item)) => {
588 let inlined_root_node_id = find_inlined_item_root(trait_item.id);
589 cache_inlined_item(def_id, trait_item.id, inlined_root_node_id);
591 // Associated consts already have to be evaluated in `typeck`, so
592 // the logic to do that already exists in `middle`. In order to
593 // reuse that code, it needs to be able to look up the traits for
595 let ty_trait_item = tcx.impl_or_trait_item(def_id).clone();
596 let trait_item_def_id = tcx.map.local_def_id(trait_item.id);
597 tcx.impl_or_trait_items.borrow_mut()
598 .insert(trait_item_def_id, ty_trait_item);
600 decoder::FoundAst::Found(&InlinedItem::ImplItem(_, ref impl_item)) => {
601 let inlined_root_node_id = find_inlined_item_root(impl_item.id);
602 cache_inlined_item(def_id, impl_item.id, inlined_root_node_id);
606 // We can be sure to hit the cache now
607 return self.maybe_get_item_ast(tcx, def_id);
610 fn local_node_for_inlined_defid(&'tcx self, def_id: DefId) -> Option<ast::NodeId> {
611 assert!(!def_id.is_local());
612 match self.inlined_item_cache.borrow().get(&def_id) {
613 Some(&Some(ref cached_inlined_item)) => {
614 Some(cached_inlined_item.item_id)
620 bug!("Trying to lookup inlined NodeId for unexpected item");
625 fn defid_for_inlined_node(&'tcx self, node_id: ast::NodeId) -> Option<DefId> {
626 self.defid_for_inlined_node.borrow().get(&node_id).map(|x| *x)
629 fn maybe_get_item_mir<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
630 -> Option<Mir<'tcx>> {
631 self.dep_graph.read(DepNode::MetaData(def));
632 let cdata = self.get_crate_data(def.krate);
633 decoder::maybe_get_item_mir(&cdata, tcx, def.index)
636 fn is_item_mir_available(&self, def: DefId) -> bool {
637 self.dep_graph.read(DepNode::MetaData(def));
638 let cdata = self.get_crate_data(def.krate);
639 decoder::is_item_mir_available(&cdata, def.index)
642 fn crates(&self) -> Vec<ast::CrateNum>
644 let mut result = vec![];
645 self.iter_crate_data(|cnum, _| result.push(cnum));
649 fn used_libraries(&self) -> Vec<(String, NativeLibraryKind)>
651 self.get_used_libraries().borrow().clone()
654 fn used_link_args(&self) -> Vec<String>
656 self.get_used_link_args().borrow().clone()
659 fn metadata_filename(&self) -> &str
661 loader::METADATA_FILENAME
664 fn metadata_section_name(&self, target: &Target) -> &str
666 loader::meta_section_name(target)
668 fn encode_type<'a>(&self,
669 tcx: TyCtxt<'a, 'tcx, 'tcx>,
671 def_id_to_string: for<'b> fn(TyCtxt<'b, 'tcx, 'tcx>, DefId) -> String)
674 encoder::encoded_ty(tcx, ty, def_id_to_string)
677 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(ast::CrateNum, Option<PathBuf>)>
679 self.do_get_used_crates(prefer)
682 fn used_crate_source(&self, cnum: ast::CrateNum) -> CrateSource
684 self.opt_used_crate_source(cnum).unwrap()
687 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<ast::CrateNum>
689 self.do_extern_mod_stmt_cnum(emod_id)
692 fn encode_metadata<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
693 reexports: &def::ExportMap,
694 link_meta: &LinkMeta,
696 mir_map: &MirMap<'tcx>,
697 krate: &hir::Crate) -> Vec<u8>
699 let ecx = encoder::EncodeContext {
700 diag: tcx.sess.diagnostic(),
702 reexports: reexports,
703 link_meta: link_meta,
705 reachable: reachable,
707 type_abbrevs: RefCell::new(FnvHashMap()),
709 encoder::encode_metadata(ecx, krate)
713 fn metadata_encoding_version(&self) -> &[u8]
715 common::metadata_encoding_version
718 /// Returns a map from a sufficiently visible external item (i.e. an external item that is
719 /// visible from at least one local module) to a sufficiently visible parent (considering
720 /// modules that re-export the external item to be parents).
721 fn visible_parent_map<'a>(&'a self) -> ::std::cell::RefMut<'a, DefIdMap<DefId>> {
722 let mut visible_parent_map = self.visible_parent_map.borrow_mut();
723 if !visible_parent_map.is_empty() { return visible_parent_map; }
725 use rustc::middle::cstore::ChildItem;
726 use std::collections::vec_deque::VecDeque;
727 use std::collections::hash_map::Entry;
728 for cnum in 1 .. self.next_crate_num() {
729 let cdata = self.get_crate_data(cnum);
731 match cdata.extern_crate.get() {
732 // Ignore crates without a corresponding local `extern crate` item.
733 Some(extern_crate) if !extern_crate.direct => continue,
737 let mut bfs_queue = &mut VecDeque::new();
738 let mut add_child = |bfs_queue: &mut VecDeque<_>, child: ChildItem, parent: DefId| {
739 let child = match child.def {
740 DefLike::DlDef(def) if child.vis == ty::Visibility::Public => def.def_id(),
744 match visible_parent_map.entry(child) {
745 Entry::Occupied(mut entry) => {
746 // If `child` is defined in crate `cnum`, ensure
747 // that it is mapped to a parent in `cnum`.
748 if child.krate == cnum && entry.get().krate != cnum {
749 entry.insert(parent);
752 Entry::Vacant(entry) => {
753 entry.insert(parent);
754 bfs_queue.push_back(child);
759 let croot = DefId { krate: cnum, index: CRATE_DEF_INDEX };
760 for child in self.crate_top_level_items(cnum) {
761 add_child(bfs_queue, child, croot);
763 while let Some(def) = bfs_queue.pop_front() {
764 for child in self.item_children(def) {
765 add_child(bfs_queue, child, def);