1 // Copyright 2012-2014 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 // Decoding metadata from a single crate's metadata
13 #![allow(non_camel_case_types)]
17 use astencode::decode_inlined_item;
18 use cstore::{self, CrateMetadata};
21 use encoder::def_to_u64;
24 use tydecode::TyDecoder;
26 use rustc::hir::svh::Svh;
27 use rustc::hir::map as hir_map;
28 use rustc::hir::map::DefKey;
29 use rustc::util::nodemap::FnvHashMap;
31 use rustc::session::config::PanicStrategy;
33 use middle::cstore::{InlinedItem, LinkagePreference};
34 use middle::cstore::{DefLike, DlDef, DlField, DlImpl, tls};
35 use rustc::hir::def::Def;
36 use rustc::hir::def_id::{DefId, DefIndex};
37 use middle::lang_items;
38 use rustc::ty::{ImplContainer, TraitContainer};
39 use rustc::ty::{self, Ty, TyCtxt, TypeFoldable, VariantKind};
41 use rustc_const_math::ConstInt;
44 use rustc::mir::visit::MutVisitor;
45 use rustc::mir::repr::Location;
54 use rustc_serialize::Decodable;
56 use syntax::parse::token;
59 use syntax::print::pprust;
61 use syntax_pos::{self, Span, BytePos, NO_EXPANSION};
63 pub type Cmd<'a> = &'a CrateMetadata;
66 fn get_item(&self, item_id: DefIndex) -> Option<rbml::Doc> {
67 self.index.lookup_item(self.data(), item_id).map(|pos| {
68 reader::doc_at(self.data(), pos as usize).unwrap().doc
72 fn lookup_item(&self, item_id: DefIndex) -> rbml::Doc {
73 match self.get_item(item_id) {
74 None => bug!("lookup_item: id not found: {:?} in crate {:?} with number {}",
83 pub fn load_index(data: &[u8]) -> index::Index {
84 let index = reader::get_doc(rbml::Doc::new(data), tag_index);
85 index::Index::from_rbml(index)
88 pub fn crate_rustc_version(data: &[u8]) -> Option<String> {
89 let doc = rbml::Doc::new(data);
90 reader::maybe_get_doc(doc, tag_rustc_version).map(|s| s.to_string())
93 pub fn load_xrefs(data: &[u8]) -> index::DenseIndex {
94 let index = reader::get_doc(rbml::Doc::new(data), tag_xref_index);
95 index::DenseIndex::from_buf(index.data, index.start, index.end)
98 // Go through each item in the metadata and create a map from that
99 // item's def-key to the item's DefIndex.
100 pub fn load_key_map(data: &[u8]) -> FnvHashMap<DefKey, DefIndex> {
101 let root_doc = rbml::Doc::new(data);
102 let items_doc = reader::get_doc(root_doc, tag_items);
103 let items_data_doc = reader::get_doc(items_doc, tag_items_data);
104 reader::docs(items_data_doc)
105 .filter(|&(tag, _)| tag == tag_items_data_item)
106 .map(|(_, item_doc)| {
107 // load def-key from item
108 let key = item_def_key(item_doc);
110 // load def-index from item; we only encode the full def-id,
111 // so just pull out the index
112 let def_id_doc = reader::get_doc(item_doc, tag_def_id);
113 let def_id = untranslated_def_id(def_id_doc);
114 assert!(def_id.is_local()); // local to the crate we are decoding, that is
121 #[derive(Clone, Copy, Debug, PartialEq)]
132 Variant(VariantKind), // V, v, w
136 Struct(VariantKind), // S, s, u
142 fn item_family(item: rbml::Doc) -> Family {
143 let fam = reader::get_doc(item, tag_items_data_item_family);
144 match reader::doc_as_u8(fam) as char {
155 'V' => Variant(VariantKind::Struct),
156 'v' => Variant(VariantKind::Tuple),
157 'w' => Variant(VariantKind::Unit),
161 'S' => Struct(VariantKind::Struct),
162 's' => Struct(VariantKind::Tuple),
163 'u' => Struct(VariantKind::Unit),
165 'N' => InheritedField,
166 c => bug!("unexpected family char: {}", c)
170 fn item_visibility(item: rbml::Doc) -> ty::Visibility {
171 match reader::maybe_get_doc(item, tag_items_data_item_visibility) {
172 None => ty::Visibility::Public,
173 Some(visibility_doc) => {
174 match reader::doc_as_u8(visibility_doc) as char {
175 'y' => ty::Visibility::Public,
176 'i' => ty::Visibility::PrivateExternal,
177 _ => bug!("unknown visibility character")
183 fn fn_constness(item: rbml::Doc) -> hir::Constness {
184 match reader::maybe_get_doc(item, tag_items_data_item_constness) {
185 None => hir::Constness::NotConst,
186 Some(constness_doc) => {
187 match reader::doc_as_u8(constness_doc) as char {
188 'c' => hir::Constness::Const,
189 'n' => hir::Constness::NotConst,
190 _ => bug!("unknown constness character")
196 fn item_defaultness(item: rbml::Doc) -> hir::Defaultness {
197 match reader::maybe_get_doc(item, tag_items_data_item_defaultness) {
198 None => hir::Defaultness::Default, // should occur only for default impls on traits
199 Some(defaultness_doc) => {
200 match reader::doc_as_u8(defaultness_doc) as char {
201 'd' => hir::Defaultness::Default,
202 'f' => hir::Defaultness::Final,
203 _ => bug!("unknown defaultness character")
209 fn item_sort(item: rbml::Doc) -> Option<char> {
210 reader::tagged_docs(item, tag_item_trait_item_sort).nth(0).map(|doc| {
211 doc.as_str().as_bytes()[0] as char
215 fn untranslated_def_id(d: rbml::Doc) -> DefId {
216 let id = reader::doc_as_u64(d);
217 let index = DefIndex::new((id & 0xFFFF_FFFF) as usize);
218 DefId { krate: (id >> 32) as u32, index: index }
221 fn translated_def_id(cdata: Cmd, d: rbml::Doc) -> DefId {
222 let def_id = untranslated_def_id(d);
223 translate_def_id(cdata, def_id)
226 fn item_parent_item(cdata: Cmd, d: rbml::Doc) -> Option<DefId> {
227 reader::tagged_docs(d, tag_items_data_parent_item).nth(0).map(|did| {
228 translated_def_id(cdata, did)
232 fn item_require_parent_item(cdata: Cmd, d: rbml::Doc) -> DefId {
233 translated_def_id(cdata, reader::get_doc(d, tag_items_data_parent_item))
236 fn item_def_id(d: rbml::Doc, cdata: Cmd) -> DefId {
237 translated_def_id(cdata, reader::get_doc(d, tag_def_id))
240 fn reexports<'a>(d: rbml::Doc<'a>) -> reader::TaggedDocsIterator<'a> {
241 reader::tagged_docs(d, tag_items_data_item_reexport)
244 fn variant_disr_val(d: rbml::Doc) -> u64 {
245 let val_doc = reader::get_doc(d, tag_disr_val);
246 reader::with_doc_data(val_doc, |data| {
247 str::from_utf8(data).unwrap().parse().unwrap()
251 fn doc_type<'a, 'tcx>(doc: rbml::Doc, tcx: TyCtxt<'a, 'tcx, 'tcx>, cdata: Cmd) -> Ty<'tcx> {
252 let tp = reader::get_doc(doc, tag_items_data_item_type);
253 TyDecoder::with_doc(tcx, cdata.cnum, tp,
254 &mut |did| translate_def_id(cdata, did))
258 fn maybe_doc_type<'a, 'tcx>(doc: rbml::Doc, tcx: TyCtxt<'a, 'tcx, 'tcx>, cdata: Cmd)
259 -> Option<Ty<'tcx>> {
260 reader::maybe_get_doc(doc, tag_items_data_item_type).map(|tp| {
261 TyDecoder::with_doc(tcx, cdata.cnum, tp,
262 &mut |did| translate_def_id(cdata, did))
267 fn doc_trait_ref<'a, 'tcx>(doc: rbml::Doc, tcx: TyCtxt<'a, 'tcx, 'tcx>, cdata: Cmd)
268 -> ty::TraitRef<'tcx> {
269 TyDecoder::with_doc(tcx, cdata.cnum, doc,
270 &mut |did| translate_def_id(cdata, did))
274 fn item_trait_ref<'a, 'tcx>(doc: rbml::Doc, tcx: TyCtxt<'a, 'tcx, 'tcx>, cdata: Cmd)
275 -> ty::TraitRef<'tcx> {
276 let tp = reader::get_doc(doc, tag_item_trait_ref);
277 doc_trait_ref(tp, tcx, cdata)
280 fn item_name(item: rbml::Doc) -> ast::Name {
281 maybe_item_name(item).expect("no item in item_name")
284 fn maybe_item_name(item: rbml::Doc) -> Option<ast::Name> {
285 reader::maybe_get_doc(item, tag_paths_data_name).map(|name| {
286 let string = name.as_str();
287 token::intern(string)
291 fn family_to_variant_kind<'tcx>(family: Family) -> Option<ty::VariantKind> {
293 Struct(VariantKind::Struct) | Variant(VariantKind::Struct) =>
294 Some(ty::VariantKind::Struct),
295 Struct(VariantKind::Tuple) | Variant(VariantKind::Tuple) =>
296 Some(ty::VariantKind::Tuple),
297 Struct(VariantKind::Unit) | Variant(VariantKind::Unit) =>
298 Some(ty::VariantKind::Unit),
303 fn item_to_def_like(cdata: Cmd, item: rbml::Doc, did: DefId) -> DefLike {
304 let fam = item_family(item);
307 // Check whether we have an associated const item.
308 match item_sort(item) {
309 Some('C') | Some('c') => {
310 DlDef(Def::AssociatedConst(did))
313 // Regular const item.
314 DlDef(Def::Const(did))
318 ImmStatic => DlDef(Def::Static(did, false)),
319 MutStatic => DlDef(Def::Static(did, true)),
320 Struct(..) => DlDef(Def::Struct(did)),
321 Fn => DlDef(Def::Fn(did)),
322 Method | StaticMethod => {
323 DlDef(Def::Method(did))
326 if item_sort(item) == Some('t') {
327 let trait_did = item_require_parent_item(cdata, item);
328 DlDef(Def::AssociatedTy(trait_did, did))
330 DlDef(Def::TyAlias(did))
333 Mod => DlDef(Def::Mod(did)),
334 ForeignMod => DlDef(Def::ForeignMod(did)),
336 let enum_did = item_require_parent_item(cdata, item);
337 DlDef(Def::Variant(enum_did, did))
339 Trait => DlDef(Def::Trait(did)),
340 Enum => DlDef(Def::Enum(did)),
341 Impl | DefaultImpl => DlImpl(did),
342 PublicField | InheritedField => DlField,
346 fn parse_unsafety(item_doc: rbml::Doc) -> hir::Unsafety {
347 let unsafety_doc = reader::get_doc(item_doc, tag_unsafety);
348 if reader::doc_as_u8(unsafety_doc) != 0 {
349 hir::Unsafety::Unsafe
351 hir::Unsafety::Normal
355 fn parse_paren_sugar(item_doc: rbml::Doc) -> bool {
356 let paren_sugar_doc = reader::get_doc(item_doc, tag_paren_sugar);
357 reader::doc_as_u8(paren_sugar_doc) != 0
360 fn parse_polarity(item_doc: rbml::Doc) -> hir::ImplPolarity {
361 let polarity_doc = reader::get_doc(item_doc, tag_polarity);
362 if reader::doc_as_u8(polarity_doc) != 0 {
363 hir::ImplPolarity::Negative
365 hir::ImplPolarity::Positive
369 fn parse_associated_type_names(item_doc: rbml::Doc) -> Vec<ast::Name> {
370 let names_doc = reader::get_doc(item_doc, tag_associated_type_names);
371 reader::tagged_docs(names_doc, tag_associated_type_name)
372 .map(|name_doc| token::intern(name_doc.as_str()))
376 pub fn get_trait_def<'a, 'tcx>(cdata: Cmd,
378 tcx: TyCtxt<'a, 'tcx, 'tcx>) -> ty::TraitDef<'tcx>
380 let item_doc = cdata.lookup_item(item_id);
381 let generics = doc_generics(item_doc, tcx, cdata);
382 let unsafety = parse_unsafety(item_doc);
383 let associated_type_names = parse_associated_type_names(item_doc);
384 let paren_sugar = parse_paren_sugar(item_doc);
386 ty::TraitDef::new(unsafety,
389 item_trait_ref(item_doc, tcx, cdata),
390 associated_type_names)
393 pub fn get_adt_def<'a, 'tcx>(cdata: Cmd,
395 tcx: TyCtxt<'a, 'tcx, 'tcx>)
396 -> ty::AdtDefMaster<'tcx>
398 fn expect_variant_kind(family: Family) -> ty::VariantKind {
399 match family_to_variant_kind(family) {
401 _ => bug!("unexpected family: {:?}", family),
404 fn get_enum_variants<'tcx>(cdata: Cmd, doc: rbml::Doc) -> Vec<ty::VariantDefData<'tcx, 'tcx>> {
405 reader::tagged_docs(doc, tag_items_data_item_variant).map(|p| {
406 let did = translated_def_id(cdata, p);
407 let item = cdata.lookup_item(did.index);
408 let disr = variant_disr_val(item);
411 name: item_name(item),
412 fields: get_variant_fields(cdata, item),
413 disr_val: ConstInt::Infer(disr),
414 kind: expect_variant_kind(item_family(item)),
418 fn get_variant_fields<'tcx>(cdata: Cmd, doc: rbml::Doc) -> Vec<ty::FieldDefData<'tcx, 'tcx>> {
420 reader::tagged_docs(doc, tag_item_field).map(|f| {
421 let ff = item_family(f);
423 PublicField | InheritedField => {},
424 _ => bug!("expected field, found {:?}", ff)
426 ty::FieldDefData::new(item_def_id(f, cdata),
428 struct_field_family_to_visibility(ff))
429 }).chain(reader::tagged_docs(doc, tag_item_unnamed_field).map(|f| {
430 let ff = item_family(f);
431 let name = token::with_ident_interner(|interner| interner.intern(index.to_string()));
433 ty::FieldDefData::new(item_def_id(f, cdata), name,
434 struct_field_family_to_visibility(ff))
437 fn get_struct_variant<'tcx>(cdata: Cmd,
439 did: DefId) -> ty::VariantDefData<'tcx, 'tcx> {
442 name: item_name(doc),
443 fields: get_variant_fields(cdata, doc),
444 disr_val: ConstInt::Infer(0),
445 kind: expect_variant_kind(item_family(doc)),
449 let doc = cdata.lookup_item(item_id);
450 let did = DefId { krate: cdata.cnum, index: item_id };
451 let mut ctor_did = None;
452 let (kind, variants) = match item_family(doc) {
455 get_enum_variants(cdata, doc))
458 // Use separate constructor id for unit/tuple structs and reuse did for braced structs.
459 ctor_did = reader::maybe_get_doc(doc, tag_items_data_item_struct_ctor).map(|ctor_doc| {
460 translated_def_id(cdata, ctor_doc)
462 (ty::AdtKind::Struct,
463 vec![get_struct_variant(cdata, doc, ctor_did.unwrap_or(did))])
465 _ => bug!("get_adt_def called on a non-ADT {:?} - {:?}",
466 item_family(doc), did)
469 let adt = tcx.intern_adt_def(did, kind, variants);
470 if let Some(ctor_did) = ctor_did {
471 // Make adt definition available through constructor id as well.
472 tcx.insert_adt_def(ctor_did, adt);
475 // this needs to be done *after* the variant is interned,
476 // to support recursive structures
477 for variant in &adt.variants {
478 if variant.kind == ty::VariantKind::Tuple &&
479 adt.adt_kind() == ty::AdtKind::Enum {
480 // tuple-like enum variant fields aren't real items - get the types
482 debug!("evaluating the ctor-type of {:?}",
484 let ctor_ty = get_type(cdata, variant.did.index, tcx);
485 debug!("evaluating the ctor-type of {:?}.. {:?}",
488 let field_tys = match ctor_ty.sty {
489 ty::TyFnDef(_, _, &ty::BareFnTy { sig: ty::Binder(ty::FnSig {
492 // tuple-struct constructors don't have escaping regions
493 assert!(!inputs.has_escaping_regions());
496 _ => bug!("tuple-variant ctor is not an ADT")
498 for (field, &ty) in variant.fields.iter().zip(field_tys.iter()) {
499 field.fulfill_ty(ty);
502 for field in &variant.fields {
503 debug!("evaluating the type of {:?}::{:?}", variant.name, field.name);
504 let ty = get_type(cdata, field.did.index, tcx);
505 field.fulfill_ty(ty);
506 debug!("evaluating the type of {:?}::{:?}: {:?}",
507 variant.name, field.name, ty);
515 pub fn get_predicates<'a, 'tcx>(cdata: Cmd,
517 tcx: TyCtxt<'a, 'tcx, 'tcx>)
518 -> ty::GenericPredicates<'tcx>
520 let item_doc = cdata.lookup_item(item_id);
521 doc_predicates(item_doc, tcx, cdata, tag_item_predicates)
524 pub fn get_super_predicates<'a, 'tcx>(cdata: Cmd,
526 tcx: TyCtxt<'a, 'tcx, 'tcx>)
527 -> ty::GenericPredicates<'tcx>
529 let item_doc = cdata.lookup_item(item_id);
530 doc_predicates(item_doc, tcx, cdata, tag_item_super_predicates)
533 pub fn get_generics<'a, 'tcx>(cdata: Cmd,
535 tcx: TyCtxt<'a, 'tcx, 'tcx>)
536 -> &'tcx ty::Generics<'tcx>
538 let item_doc = cdata.lookup_item(item_id);
539 doc_generics(item_doc, tcx, cdata)
542 pub fn get_type<'a, 'tcx>(cdata: Cmd, id: DefIndex, tcx: TyCtxt<'a, 'tcx, 'tcx>)
545 let item_doc = cdata.lookup_item(id);
546 doc_type(item_doc, tcx, cdata)
549 pub fn get_stability(cdata: Cmd, id: DefIndex) -> Option<attr::Stability> {
550 let item = cdata.lookup_item(id);
551 reader::maybe_get_doc(item, tag_items_data_item_stability).map(|doc| {
552 let mut decoder = reader::Decoder::new(doc);
553 Decodable::decode(&mut decoder).unwrap()
557 pub fn get_deprecation(cdata: Cmd, id: DefIndex) -> Option<attr::Deprecation> {
558 let item = cdata.lookup_item(id);
559 reader::maybe_get_doc(item, tag_items_data_item_deprecation).map(|doc| {
560 let mut decoder = reader::Decoder::new(doc);
561 Decodable::decode(&mut decoder).unwrap()
565 pub fn get_visibility(cdata: Cmd, id: DefIndex) -> ty::Visibility {
566 item_visibility(cdata.lookup_item(id))
569 pub fn get_parent_impl(cdata: Cmd, id: DefIndex) -> Option<DefId> {
570 let item = cdata.lookup_item(id);
571 reader::maybe_get_doc(item, tag_items_data_parent_impl).map(|doc| {
572 translated_def_id(cdata, doc)
576 pub fn get_repr_attrs(cdata: Cmd, id: DefIndex) -> Vec<attr::ReprAttr> {
577 let item = cdata.lookup_item(id);
578 match reader::maybe_get_doc(item, tag_items_data_item_repr).map(|doc| {
579 let mut decoder = reader::Decoder::new(doc);
580 Decodable::decode(&mut decoder).unwrap()
582 Some(attrs) => attrs,
587 pub fn get_impl_polarity<'tcx>(cdata: Cmd,
589 -> Option<hir::ImplPolarity>
591 let item_doc = cdata.lookup_item(id);
592 let fam = item_family(item_doc);
595 Some(parse_polarity(item_doc))
601 pub fn get_custom_coerce_unsized_kind<'tcx>(
604 -> Option<ty::adjustment::CustomCoerceUnsized>
606 let item_doc = cdata.lookup_item(id);
607 reader::maybe_get_doc(item_doc, tag_impl_coerce_unsized_kind).map(|kind_doc| {
608 let mut decoder = reader::Decoder::new(kind_doc);
609 Decodable::decode(&mut decoder).unwrap()
613 pub fn get_impl_trait<'a, 'tcx>(cdata: Cmd,
615 tcx: TyCtxt<'a, 'tcx, 'tcx>)
616 -> Option<ty::TraitRef<'tcx>>
618 let item_doc = cdata.lookup_item(id);
619 let fam = item_family(item_doc);
621 Family::Impl | Family::DefaultImpl => {
622 reader::maybe_get_doc(item_doc, tag_item_trait_ref).map(|tp| {
623 doc_trait_ref(tp, tcx, cdata)
630 /// Iterates over the language items in the given crate.
631 pub fn each_lang_item<F>(cdata: Cmd, mut f: F) -> bool where
632 F: FnMut(DefIndex, usize) -> bool,
634 let root = rbml::Doc::new(cdata.data());
635 let lang_items = reader::get_doc(root, tag_lang_items);
636 reader::tagged_docs(lang_items, tag_lang_items_item).all(|item_doc| {
637 let id_doc = reader::get_doc(item_doc, tag_lang_items_item_id);
638 let id = reader::doc_as_u32(id_doc) as usize;
639 let index_doc = reader::get_doc(item_doc, tag_lang_items_item_index);
640 let index = DefIndex::from_u32(reader::doc_as_u32(index_doc));
646 fn each_child_of_item_or_crate<F, G>(cdata: Cmd,
648 mut get_crate_data: G,
649 mut callback: F) where
650 F: FnMut(DefLike, ast::Name, ty::Visibility),
651 G: FnMut(ast::CrateNum) -> Rc<CrateMetadata>,
653 // Iterate over all children.
654 for child_info_doc in reader::tagged_docs(item_doc, tag_mod_child) {
655 let child_def_id = translated_def_id(cdata, child_info_doc);
657 // This item may be in yet another crate if it was the child of a
659 let crate_data = if child_def_id.krate == cdata.cnum {
662 Some(get_crate_data(child_def_id.krate))
664 let crate_data = match crate_data {
665 Some(ref cdata) => &**cdata,
670 if let Some(child_item_doc) = crate_data.get_item(child_def_id.index) {
671 // Hand off the item to the callback.
672 let child_name = item_name(child_item_doc);
673 let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
674 let visibility = item_visibility(child_item_doc);
675 callback(def_like, child_name, visibility);
679 for reexport_doc in reexports(item_doc) {
680 let def_id_doc = reader::get_doc(reexport_doc,
681 tag_items_data_item_reexport_def_id);
682 let child_def_id = translated_def_id(cdata, def_id_doc);
684 let name_doc = reader::get_doc(reexport_doc,
685 tag_items_data_item_reexport_name);
686 let name = name_doc.as_str();
688 // This reexport may be in yet another crate.
689 let crate_data = if child_def_id.krate == cdata.cnum {
692 Some(get_crate_data(child_def_id.krate))
694 let crate_data = match crate_data {
695 Some(ref cdata) => &**cdata,
700 if let Some(child_item_doc) = crate_data.get_item(child_def_id.index) {
701 // Hand off the item to the callback.
702 let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
703 // These items have a public visibility because they're part of
704 // a public re-export.
705 callback(def_like, token::intern(name), ty::Visibility::Public);
710 /// Iterates over each child of the given item.
711 pub fn each_child_of_item<F, G>(cdata: Cmd, id: DefIndex, get_crate_data: G, callback: F)
712 where F: FnMut(DefLike, ast::Name, ty::Visibility),
713 G: FnMut(ast::CrateNum) -> Rc<CrateMetadata>,
716 let item_doc = match cdata.get_item(id) {
718 Some(item_doc) => item_doc,
721 each_child_of_item_or_crate(cdata, item_doc, get_crate_data, callback)
724 /// Iterates over all the top-level crate items.
725 pub fn each_top_level_item_of_crate<F, G>(cdata: Cmd, get_crate_data: G, callback: F)
726 where F: FnMut(DefLike, ast::Name, ty::Visibility),
727 G: FnMut(ast::CrateNum) -> Rc<CrateMetadata>,
729 let root_doc = rbml::Doc::new(cdata.data());
730 let misc_info_doc = reader::get_doc(root_doc, tag_misc_info);
731 let crate_items_doc = reader::get_doc(misc_info_doc,
732 tag_misc_info_crate_items);
734 each_child_of_item_or_crate(cdata,
740 pub fn get_item_name(cdata: Cmd, id: DefIndex) -> ast::Name {
741 item_name(cdata.lookup_item(id))
744 pub fn maybe_get_item_name(cdata: Cmd, id: DefIndex) -> Option<ast::Name> {
745 maybe_item_name(cdata.lookup_item(id))
748 pub enum FoundAst<'ast> {
749 Found(&'ast InlinedItem),
750 FoundParent(DefId, &'ast hir::Item),
754 pub fn maybe_get_item_ast<'a, 'tcx>(cdata: Cmd, tcx: TyCtxt<'a, 'tcx, 'tcx>, id: DefIndex)
756 debug!("Looking up item: {:?}", id);
757 let item_doc = cdata.lookup_item(id);
758 let item_did = item_def_id(item_doc, cdata);
759 let parent_def_id = DefId {
761 index: def_key(cdata, id).parent.unwrap()
763 let mut parent_def_path = def_path(cdata, id);
764 parent_def_path.data.pop();
765 if let Some(ast_doc) = reader::maybe_get_doc(item_doc, tag_ast as usize) {
766 let ii = decode_inlined_item(cdata,
772 return FoundAst::Found(ii);
773 } else if let Some(parent_did) = item_parent_item(cdata, item_doc) {
774 // Remove the last element from the paths, since we are now
775 // trying to inline the parent.
776 let grandparent_def_id = DefId {
778 index: def_key(cdata, parent_def_id.index).parent.unwrap()
780 let mut grandparent_def_path = parent_def_path;
781 grandparent_def_path.data.pop();
782 let parent_doc = cdata.lookup_item(parent_did.index);
783 if let Some(ast_doc) = reader::maybe_get_doc(parent_doc, tag_ast as usize) {
784 let ii = decode_inlined_item(cdata,
786 grandparent_def_path,
790 if let &InlinedItem::Item(_, ref i) = ii {
791 return FoundAst::FoundParent(parent_did, i);
798 pub fn is_item_mir_available<'tcx>(cdata: Cmd, id: DefIndex) -> bool {
799 if let Some(item_doc) = cdata.get_item(id) {
800 return reader::maybe_get_doc(item_doc, tag_mir as usize).is_some();
806 pub fn maybe_get_item_mir<'a, 'tcx>(cdata: Cmd,
807 tcx: TyCtxt<'a, 'tcx, 'tcx>,
809 -> Option<mir::repr::Mir<'tcx>> {
810 let item_doc = cdata.lookup_item(id);
812 return reader::maybe_get_doc(item_doc, tag_mir as usize).map(|mir_doc| {
813 let dcx = tls_context::DecodingContext {
814 crate_metadata: cdata,
817 let mut decoder = reader::Decoder::new(mir_doc);
819 let mut mir = decoder.read_opaque(|opaque_decoder, _| {
820 tls::enter_decoding_context(&dcx, opaque_decoder, |_, opaque_decoder| {
821 Decodable::decode(opaque_decoder)
825 assert!(decoder.position() == mir_doc.end);
827 let mut def_id_and_span_translator = MirDefIdAndSpanTranslator {
828 crate_metadata: cdata,
829 codemap: tcx.sess.codemap(),
830 last_filemap_index_hint: Cell::new(0),
833 def_id_and_span_translator.visit_mir(&mut mir);
834 for promoted in &mut mir.promoted {
835 def_id_and_span_translator.visit_mir(promoted);
841 struct MirDefIdAndSpanTranslator<'cdata, 'codemap> {
842 crate_metadata: Cmd<'cdata>,
843 codemap: &'codemap codemap::CodeMap,
844 last_filemap_index_hint: Cell<usize>
847 impl<'v, 'cdata, 'codemap> mir::visit::MutVisitor<'v>
848 for MirDefIdAndSpanTranslator<'cdata, 'codemap>
850 fn visit_def_id(&mut self, def_id: &mut DefId, _: Location) {
851 *def_id = translate_def_id(self.crate_metadata, *def_id);
854 fn visit_span(&mut self, span: &mut Span) {
855 *span = translate_span(self.crate_metadata,
857 &self.last_filemap_index_hint,
863 fn get_explicit_self<'a, 'tcx>(item: rbml::Doc, tcx: TyCtxt<'a, 'tcx, 'tcx>)
864 -> ty::ExplicitSelfCategory<'tcx> {
865 fn get_mutability(ch: u8) -> hir::Mutability {
867 'i' => hir::MutImmutable,
868 'm' => hir::MutMutable,
869 _ => bug!("unknown mutability character: `{}`", ch as char),
873 let explicit_self_doc = reader::get_doc(item, tag_item_trait_method_explicit_self);
874 let string = explicit_self_doc.as_str();
876 let explicit_self_kind = string.as_bytes()[0];
877 match explicit_self_kind as char {
878 's' => ty::ExplicitSelfCategory::Static,
879 'v' => ty::ExplicitSelfCategory::ByValue,
880 '~' => ty::ExplicitSelfCategory::ByBox,
881 // FIXME(#4846) expl. region
883 ty::ExplicitSelfCategory::ByReference(
884 tcx.mk_region(ty::ReEmpty),
885 get_mutability(string.as_bytes()[1]))
887 _ => bug!("unknown self type code: `{}`", explicit_self_kind as char)
891 /// Returns the def IDs of all the items in the given implementation.
892 pub fn get_impl_items(cdata: Cmd, impl_id: DefIndex)
893 -> Vec<ty::ImplOrTraitItemId> {
894 reader::tagged_docs(cdata.lookup_item(impl_id), tag_item_impl_item).map(|doc| {
895 let def_id = item_def_id(doc, cdata);
896 match item_sort(doc) {
897 Some('C') | Some('c') => ty::ConstTraitItemId(def_id),
898 Some('r') | Some('p') => ty::MethodTraitItemId(def_id),
899 Some('t') => ty::TypeTraitItemId(def_id),
900 _ => bug!("unknown impl item sort"),
905 pub fn get_trait_name(cdata: Cmd, id: DefIndex) -> ast::Name {
906 let doc = cdata.lookup_item(id);
910 pub fn get_impl_or_trait_item<'a, 'tcx>(cdata: Cmd, id: DefIndex, tcx: TyCtxt<'a, 'tcx, 'tcx>)
911 -> Option<ty::ImplOrTraitItem<'tcx>> {
912 let item_doc = cdata.lookup_item(id);
914 let def_id = item_def_id(item_doc, cdata);
916 let container_id = if let Some(id) = item_parent_item(cdata, item_doc) {
921 let container_doc = cdata.lookup_item(container_id.index);
922 let container = match item_family(container_doc) {
923 Trait => TraitContainer(container_id),
924 _ => ImplContainer(container_id),
927 let name = item_name(item_doc);
928 let vis = item_visibility(item_doc);
929 let defaultness = item_defaultness(item_doc);
931 Some(match item_sort(item_doc) {
932 sort @ Some('C') | sort @ Some('c') => {
933 let ty = doc_type(item_doc, tcx, cdata);
934 ty::ConstTraitItem(Rc::new(ty::AssociatedConst {
938 defaultness: defaultness,
940 container: container,
941 has_value: sort == Some('C')
944 Some('r') | Some('p') => {
945 let generics = doc_generics(item_doc, tcx, cdata);
946 let predicates = doc_predicates(item_doc, tcx, cdata, tag_item_predicates);
947 let ity = tcx.lookup_item_type(def_id).ty;
948 let fty = match ity.sty {
949 ty::TyFnDef(_, _, fty) => fty,
951 "the type {:?} of the method {:?} is not a function?",
954 let explicit_self = get_explicit_self(item_doc, tcx);
956 ty::MethodTraitItem(Rc::new(ty::Method::new(name,
967 let ty = maybe_doc_type(item_doc, tcx, cdata);
968 ty::TypeTraitItem(Rc::new(ty::AssociatedType {
972 defaultness: defaultness,
974 container: container,
981 pub fn get_trait_item_def_ids(cdata: Cmd, id: DefIndex)
982 -> Vec<ty::ImplOrTraitItemId> {
983 let item = cdata.lookup_item(id);
984 reader::tagged_docs(item, tag_item_trait_item).map(|mth| {
985 let def_id = item_def_id(mth, cdata);
986 match item_sort(mth) {
987 Some('C') | Some('c') => ty::ConstTraitItemId(def_id),
988 Some('r') | Some('p') => ty::MethodTraitItemId(def_id),
989 Some('t') => ty::TypeTraitItemId(def_id),
990 _ => bug!("unknown trait item sort"),
995 pub fn get_item_variances(cdata: Cmd, id: DefIndex) -> Vec<ty::Variance> {
996 let item_doc = cdata.lookup_item(id);
997 let variance_doc = reader::get_doc(item_doc, tag_item_variances);
998 let mut decoder = reader::Decoder::new(variance_doc);
999 Decodable::decode(&mut decoder).unwrap()
1002 pub fn get_provided_trait_methods<'a, 'tcx>(cdata: Cmd,
1004 tcx: TyCtxt<'a, 'tcx, 'tcx>)
1005 -> Vec<Rc<ty::Method<'tcx>>> {
1006 let item = cdata.lookup_item(id);
1008 reader::tagged_docs(item, tag_item_trait_item).filter_map(|mth_id| {
1009 let did = item_def_id(mth_id, cdata);
1010 let mth = cdata.lookup_item(did.index);
1012 if item_sort(mth) == Some('p') {
1013 let trait_item = get_impl_or_trait_item(cdata, did.index, tcx);
1014 if let Some(ty::MethodTraitItem(ref method)) = trait_item {
1015 Some((*method).clone())
1025 pub fn get_associated_consts<'a, 'tcx>(cdata: Cmd, id: DefIndex, tcx: TyCtxt<'a, 'tcx, 'tcx>)
1026 -> Vec<Rc<ty::AssociatedConst<'tcx>>> {
1027 let item = cdata.lookup_item(id);
1029 [tag_item_trait_item, tag_item_impl_item].iter().flat_map(|&tag| {
1030 reader::tagged_docs(item, tag).filter_map(|ac_id| {
1031 let did = item_def_id(ac_id, cdata);
1032 let ac_doc = cdata.lookup_item(did.index);
1034 match item_sort(ac_doc) {
1035 Some('C') | Some('c') => {
1036 let trait_item = get_impl_or_trait_item(cdata, did.index, tcx);
1037 if let Some(ty::ConstTraitItem(ref ac)) = trait_item {
1049 pub fn get_variant_kind(cdata: Cmd, node_id: DefIndex) -> Option<VariantKind>
1051 let item = cdata.lookup_item(node_id);
1052 family_to_variant_kind(item_family(item))
1055 pub fn get_struct_ctor_def_id(cdata: Cmd, node_id: DefIndex) -> Option<DefId>
1057 let item = cdata.lookup_item(node_id);
1058 reader::maybe_get_doc(item, tag_items_data_item_struct_ctor).
1059 map(|ctor_doc| translated_def_id(cdata, ctor_doc))
1062 /// If node_id is the constructor of a tuple struct, retrieve the NodeId of
1063 /// the actual type definition, otherwise, return None
1064 pub fn get_tuple_struct_definition_if_ctor(cdata: Cmd,
1068 let item = cdata.lookup_item(node_id);
1069 reader::tagged_docs(item, tag_items_data_item_is_tuple_struct_ctor).next().map(|_| {
1070 item_require_parent_item(cdata, item)
1074 pub fn get_item_attrs(cdata: Cmd,
1075 orig_node_id: DefIndex)
1076 -> Vec<ast::Attribute> {
1077 // The attributes for a tuple struct are attached to the definition, not the ctor;
1078 // we assume that someone passing in a tuple struct ctor is actually wanting to
1079 // look at the definition
1080 let node_id = get_tuple_struct_definition_if_ctor(cdata, orig_node_id);
1081 let node_id = node_id.map(|x| x.index).unwrap_or(orig_node_id);
1082 let item = cdata.lookup_item(node_id);
1083 get_attributes(item)
1086 pub fn get_struct_field_attrs(cdata: Cmd) -> FnvHashMap<DefId, Vec<ast::Attribute>> {
1087 let data = rbml::Doc::new(cdata.data());
1088 let fields = reader::get_doc(data, tag_struct_fields);
1089 reader::tagged_docs(fields, tag_struct_field).map(|field| {
1090 let def_id = translated_def_id(cdata, reader::get_doc(field, tag_def_id));
1091 let attrs = get_attributes(field);
1096 fn struct_field_family_to_visibility(family: Family) -> ty::Visibility {
1098 PublicField => ty::Visibility::Public,
1099 InheritedField => ty::Visibility::PrivateExternal,
1104 pub fn get_struct_field_names(cdata: Cmd, id: DefIndex) -> Vec<ast::Name> {
1105 let item = cdata.lookup_item(id);
1107 reader::tagged_docs(item, tag_item_field).map(|an_item| {
1109 }).chain(reader::tagged_docs(item, tag_item_unnamed_field).map(|_| {
1110 let name = token::with_ident_interner(|interner| interner.intern(index.to_string()));
1116 fn get_meta_items(md: rbml::Doc) -> Vec<P<ast::MetaItem>> {
1117 reader::tagged_docs(md, tag_meta_item_word).map(|meta_item_doc| {
1118 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1119 let n = token::intern_and_get_ident(nd.as_str());
1120 attr::mk_word_item(n)
1121 }).chain(reader::tagged_docs(md, tag_meta_item_name_value).map(|meta_item_doc| {
1122 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1123 let vd = reader::get_doc(meta_item_doc, tag_meta_item_value);
1124 let n = token::intern_and_get_ident(nd.as_str());
1125 let v = token::intern_and_get_ident(vd.as_str());
1126 // FIXME (#623): Should be able to decode MetaItemKind::NameValue variants,
1127 // but currently the encoder just drops them
1128 attr::mk_name_value_item_str(n, v)
1129 })).chain(reader::tagged_docs(md, tag_meta_item_list).map(|meta_item_doc| {
1130 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1131 let n = token::intern_and_get_ident(nd.as_str());
1132 let subitems = get_meta_items(meta_item_doc);
1133 attr::mk_list_item(n, subitems)
1137 fn get_attributes(md: rbml::Doc) -> Vec<ast::Attribute> {
1138 match reader::maybe_get_doc(md, tag_attributes) {
1140 reader::tagged_docs(attrs_d, tag_attribute).map(|attr_doc| {
1141 let is_sugared_doc = reader::doc_as_u8(
1142 reader::get_doc(attr_doc, tag_attribute_is_sugared_doc)
1144 let meta_items = get_meta_items(attr_doc);
1145 // Currently it's only possible to have a single meta item on
1147 assert_eq!(meta_items.len(), 1);
1148 let meta_item = meta_items.into_iter().nth(0).unwrap();
1149 attr::mk_doc_attr_outer(attr::mk_attr_id(), meta_item, is_sugared_doc)
1156 fn list_crate_attributes(md: rbml::Doc, hash: &Svh,
1157 out: &mut io::Write) -> io::Result<()> {
1158 write!(out, "=Crate Attributes ({})=\n", *hash)?;
1160 let r = get_attributes(md);
1162 write!(out, "{}\n", pprust::attribute_to_string(attr))?;
1168 pub fn get_crate_attributes(data: &[u8]) -> Vec<ast::Attribute> {
1169 get_attributes(rbml::Doc::new(data))
1173 pub struct CrateDep {
1174 pub cnum: ast::CrateNum,
1177 pub explicitly_linked: bool,
1180 pub fn get_crate_deps(data: &[u8]) -> Vec<CrateDep> {
1181 let cratedoc = rbml::Doc::new(data);
1182 let depsdoc = reader::get_doc(cratedoc, tag_crate_deps);
1184 fn docstr(doc: rbml::Doc, tag_: usize) -> String {
1185 let d = reader::get_doc(doc, tag_);
1186 d.as_str().to_string()
1189 reader::tagged_docs(depsdoc, tag_crate_dep).enumerate().map(|(crate_num, depdoc)| {
1190 let name = docstr(depdoc, tag_crate_dep_crate_name);
1191 let hash = Svh::new(reader::doc_as_u64(reader::get_doc(depdoc, tag_crate_dep_hash)));
1192 let doc = reader::get_doc(depdoc, tag_crate_dep_explicitly_linked);
1193 let explicitly_linked = reader::doc_as_u8(doc) != 0;
1195 cnum: crate_num as u32 + 1,
1198 explicitly_linked: explicitly_linked,
1203 fn list_crate_deps(data: &[u8], out: &mut io::Write) -> io::Result<()> {
1204 write!(out, "=External Dependencies=\n")?;
1205 for dep in &get_crate_deps(data) {
1206 write!(out, "{} {}-{}\n", dep.cnum, dep.name, dep.hash)?;
1212 pub fn maybe_get_crate_hash(data: &[u8]) -> Option<Svh> {
1213 let cratedoc = rbml::Doc::new(data);
1214 reader::maybe_get_doc(cratedoc, tag_crate_hash).map(|doc| {
1215 Svh::new(reader::doc_as_u64(doc))
1219 pub fn get_crate_hash(data: &[u8]) -> Svh {
1220 let cratedoc = rbml::Doc::new(data);
1221 let hashdoc = reader::get_doc(cratedoc, tag_crate_hash);
1222 Svh::new(reader::doc_as_u64(hashdoc))
1225 pub fn maybe_get_crate_name(data: &[u8]) -> Option<&str> {
1226 let cratedoc = rbml::Doc::new(data);
1227 reader::maybe_get_doc(cratedoc, tag_crate_crate_name).map(|doc| {
1232 pub fn get_crate_disambiguator<'a>(data: &'a [u8]) -> &'a str {
1233 let crate_doc = rbml::Doc::new(data);
1234 let disambiguator_doc = reader::get_doc(crate_doc, tag_crate_disambiguator);
1235 let slice: &'a str = disambiguator_doc.as_str();
1239 pub fn get_crate_triple(data: &[u8]) -> Option<String> {
1240 let cratedoc = rbml::Doc::new(data);
1241 let triple_doc = reader::maybe_get_doc(cratedoc, tag_crate_triple);
1242 triple_doc.map(|s| s.as_str().to_string())
1245 pub fn get_crate_name(data: &[u8]) -> &str {
1246 maybe_get_crate_name(data).expect("no crate name in crate")
1249 pub fn list_crate_metadata(bytes: &[u8], out: &mut io::Write) -> io::Result<()> {
1250 let hash = get_crate_hash(bytes);
1251 let md = rbml::Doc::new(bytes);
1252 list_crate_attributes(md, &hash, out)?;
1253 list_crate_deps(bytes, out)
1256 // Translates a def_id from an external crate to a def_id for the current
1257 // compilation environment. We use this when trying to load types from
1258 // external crates - if those types further refer to types in other crates
1259 // then we must translate the crate number from that encoded in the external
1260 // crate to the correct local crate number.
1261 pub fn translate_def_id(cdata: Cmd, did: DefId) -> DefId {
1263 return DefId { krate: cdata.cnum, index: did.index };
1267 krate: cdata.cnum_map.borrow()[did.krate],
1272 // Translate a DefId from the current compilation environment to a DefId
1273 // for an external crate.
1274 fn reverse_translate_def_id(cdata: Cmd, did: DefId) -> Option<DefId> {
1275 for (local, &global) in cdata.cnum_map.borrow().iter_enumerated() {
1276 if global == did.krate {
1277 return Some(DefId { krate: local, index: did.index });
1284 /// Translates a `Span` from an extern crate to the corresponding `Span`
1285 /// within the local crate's codemap.
1286 pub fn translate_span(cdata: Cmd,
1287 codemap: &codemap::CodeMap,
1288 last_filemap_index_hint: &Cell<usize>,
1289 span: syntax_pos::Span)
1290 -> syntax_pos::Span {
1291 let span = if span.lo > span.hi {
1292 // Currently macro expansion sometimes produces invalid Span values
1293 // where lo > hi. In order not to crash the compiler when trying to
1294 // translate these values, let's transform them into something we
1295 // can handle (and which will produce useful debug locations at
1296 // least some of the time).
1297 // This workaround is only necessary as long as macro expansion is
1298 // not fixed. FIXME(#23480)
1299 syntax_pos::mk_sp(span.lo, span.lo)
1304 let imported_filemaps = cdata.imported_filemaps(&codemap);
1306 // Optimize for the case that most spans within a translated item
1307 // originate from the same filemap.
1308 let last_filemap_index = last_filemap_index_hint.get();
1309 let last_filemap = &imported_filemaps[last_filemap_index];
1311 if span.lo >= last_filemap.original_start_pos &&
1312 span.lo <= last_filemap.original_end_pos &&
1313 span.hi >= last_filemap.original_start_pos &&
1314 span.hi <= last_filemap.original_end_pos {
1318 let mut b = imported_filemaps.len();
1321 let m = (a + b) / 2;
1322 if imported_filemaps[m].original_start_pos > span.lo {
1329 last_filemap_index_hint.set(a);
1330 &imported_filemaps[a]
1334 let lo = (span.lo - filemap.original_start_pos) +
1335 filemap.translated_filemap.start_pos;
1336 let hi = (span.hi - filemap.original_start_pos) +
1337 filemap.translated_filemap.start_pos;
1339 syntax_pos::mk_sp(lo, hi)
1342 pub fn each_inherent_implementation_for_type<F>(cdata: Cmd,
1345 where F: FnMut(DefId),
1347 let item_doc = cdata.lookup_item(id);
1348 for impl_doc in reader::tagged_docs(item_doc, tag_items_data_item_inherent_impl) {
1349 if reader::maybe_get_doc(impl_doc, tag_item_trait_ref).is_none() {
1350 callback(item_def_id(impl_doc, cdata));
1355 pub fn each_implementation_for_trait<F>(cdata: Cmd,
1357 mut callback: F) where
1360 // Do a reverse lookup beforehand to avoid touching the crate_num
1361 // hash map in the loop below.
1362 if let Some(crate_local_did) = reverse_translate_def_id(cdata, def_id) {
1363 let def_id_u64 = def_to_u64(crate_local_did);
1365 let impls_doc = reader::get_doc(rbml::Doc::new(cdata.data()), tag_impls);
1366 for trait_doc in reader::tagged_docs(impls_doc, tag_impls_trait) {
1367 let trait_def_id = reader::get_doc(trait_doc, tag_def_id);
1368 if reader::doc_as_u64(trait_def_id) != def_id_u64 {
1371 for impl_doc in reader::tagged_docs(trait_doc, tag_impls_trait_impl) {
1372 callback(translated_def_id(cdata, impl_doc));
1378 pub fn get_trait_of_item(cdata: Cmd, id: DefIndex) -> Option<DefId> {
1379 let item_doc = cdata.lookup_item(id);
1380 let parent_item_id = match item_parent_item(cdata, item_doc) {
1381 None => return None,
1382 Some(item_id) => item_id,
1384 let parent_item_doc = cdata.lookup_item(parent_item_id.index);
1385 match item_family(parent_item_doc) {
1386 Trait => Some(item_def_id(parent_item_doc, cdata)),
1392 pub fn get_native_libraries(cdata: Cmd)
1393 -> Vec<(cstore::NativeLibraryKind, String)> {
1394 let libraries = reader::get_doc(rbml::Doc::new(cdata.data()),
1395 tag_native_libraries);
1396 reader::tagged_docs(libraries, tag_native_libraries_lib).map(|lib_doc| {
1397 let kind_doc = reader::get_doc(lib_doc, tag_native_libraries_kind);
1398 let name_doc = reader::get_doc(lib_doc, tag_native_libraries_name);
1399 let kind: cstore::NativeLibraryKind =
1400 cstore::NativeLibraryKind::from_u32(reader::doc_as_u32(kind_doc)).unwrap();
1401 let name = name_doc.as_str().to_string();
1406 pub fn get_plugin_registrar_fn(data: &[u8]) -> Option<DefIndex> {
1407 reader::maybe_get_doc(rbml::Doc::new(data), tag_plugin_registrar_fn)
1408 .map(|doc| DefIndex::from_u32(reader::doc_as_u32(doc)))
1411 pub fn each_exported_macro<F>(data: &[u8], mut f: F) where
1412 F: FnMut(ast::Name, Vec<ast::Attribute>, Span, String) -> bool,
1414 let macros = reader::get_doc(rbml::Doc::new(data), tag_macro_defs);
1415 for macro_doc in reader::tagged_docs(macros, tag_macro_def) {
1416 let name = item_name(macro_doc);
1417 let attrs = get_attributes(macro_doc);
1418 let span = get_macro_span(macro_doc);
1419 let body = reader::get_doc(macro_doc, tag_macro_def_body);
1420 if !f(name, attrs, span, body.as_str().to_string()) {
1426 pub fn get_macro_span(doc: rbml::Doc) -> Span {
1427 let lo_doc = reader::get_doc(doc, tag_macro_def_span_lo);
1428 let lo = BytePos(reader::doc_as_u32(lo_doc));
1429 let hi_doc = reader::get_doc(doc, tag_macro_def_span_hi);
1430 let hi = BytePos(reader::doc_as_u32(hi_doc));
1431 return Span { lo: lo, hi: hi, expn_id: NO_EXPANSION };
1434 pub fn get_dylib_dependency_formats(cdata: Cmd)
1435 -> Vec<(ast::CrateNum, LinkagePreference)>
1437 let formats = reader::get_doc(rbml::Doc::new(cdata.data()),
1438 tag_dylib_dependency_formats);
1439 let mut result = Vec::new();
1441 debug!("found dylib deps: {}", formats.as_str());
1442 for spec in formats.as_str().split(',') {
1443 if spec.is_empty() { continue }
1444 let mut split = spec.split(':');
1445 let cnum = split.next().unwrap();
1446 let link = split.next().unwrap();
1447 let cnum: ast::CrateNum = cnum.parse().unwrap();
1448 let cnum = cdata.cnum_map.borrow()[cnum];
1449 result.push((cnum, if link == "d" {
1450 LinkagePreference::RequireDynamic
1452 LinkagePreference::RequireStatic
1458 pub fn get_missing_lang_items(cdata: Cmd)
1459 -> Vec<lang_items::LangItem>
1461 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_lang_items);
1462 reader::tagged_docs(items, tag_lang_items_missing).map(|missing_docs| {
1463 lang_items::LangItem::from_u32(reader::doc_as_u32(missing_docs)).unwrap()
1467 pub fn get_method_arg_names(cdata: Cmd, id: DefIndex) -> Vec<String> {
1468 let method_doc = cdata.lookup_item(id);
1469 match reader::maybe_get_doc(method_doc, tag_method_argument_names) {
1471 reader::tagged_docs(args_doc, tag_method_argument_name).map(|name_doc| {
1472 name_doc.as_str().to_string()
1479 pub fn get_reachable_ids(cdata: Cmd) -> Vec<DefId> {
1480 let items = reader::get_doc(rbml::Doc::new(cdata.data()),
1482 reader::tagged_docs(items, tag_reachable_id).map(|doc| {
1485 index: DefIndex::from_u32(reader::doc_as_u32(doc)),
1490 pub fn is_typedef(cdata: Cmd, id: DefIndex) -> bool {
1491 let item_doc = cdata.lookup_item(id);
1492 match item_family(item_doc) {
1498 pub fn is_const_fn(cdata: Cmd, id: DefIndex) -> bool {
1499 let item_doc = cdata.lookup_item(id);
1500 match fn_constness(item_doc) {
1501 hir::Constness::Const => true,
1502 hir::Constness::NotConst => false,
1506 pub fn is_extern_item<'a, 'tcx>(cdata: Cmd,
1508 tcx: TyCtxt<'a, 'tcx, 'tcx>)
1510 let item_doc = match cdata.get_item(id) {
1512 None => return false,
1514 let applicable = match item_family(item_doc) {
1515 ImmStatic | MutStatic => true,
1516 Fn => get_generics(cdata, id, tcx).types.is_empty(),
1521 attr::contains_extern_indicator(tcx.sess.diagnostic(),
1522 &get_attributes(item_doc))
1528 pub fn is_foreign_item(cdata: Cmd, id: DefIndex) -> bool {
1529 let item_doc = cdata.lookup_item(id);
1530 let parent_item_id = match item_parent_item(cdata, item_doc) {
1531 None => return false,
1532 Some(item_id) => item_id,
1534 let parent_item_doc = cdata.lookup_item(parent_item_id.index);
1535 item_family(parent_item_doc) == ForeignMod
1538 pub fn is_impl(cdata: Cmd, id: DefIndex) -> bool {
1539 let item_doc = cdata.lookup_item(id);
1540 match item_family(item_doc) {
1546 fn doc_generics<'a, 'tcx>(base_doc: rbml::Doc,
1547 tcx: TyCtxt<'a, 'tcx, 'tcx>,
1549 -> &'tcx ty::Generics<'tcx>
1551 let doc = reader::get_doc(base_doc, tag_item_generics);
1552 TyDecoder::with_doc(tcx, cdata.cnum, doc,
1553 &mut |did| translate_def_id(cdata, did))
1557 fn doc_predicate<'a, 'tcx>(cdata: Cmd,
1559 tcx: TyCtxt<'a, 'tcx, 'tcx>)
1560 -> ty::Predicate<'tcx>
1562 let predicate_pos = cdata.xref_index.lookup(
1563 cdata.data(), reader::doc_as_u32(doc)).unwrap() as usize;
1565 cdata.data(), cdata.cnum, predicate_pos, tcx,
1566 &mut |did| translate_def_id(cdata, did)
1570 fn doc_predicates<'a, 'tcx>(base_doc: rbml::Doc,
1571 tcx: TyCtxt<'a, 'tcx, 'tcx>,
1574 -> ty::GenericPredicates<'tcx>
1576 let doc = reader::get_doc(base_doc, tag);
1578 ty::GenericPredicates {
1579 parent: item_parent_item(cdata, doc),
1580 predicates: reader::tagged_docs(doc, tag_predicate).map(|predicate_doc| {
1581 doc_predicate(cdata, predicate_doc, tcx)
1586 pub fn is_defaulted_trait(cdata: Cmd, trait_id: DefIndex) -> bool {
1587 let trait_doc = cdata.lookup_item(trait_id);
1588 assert!(item_family(trait_doc) == Family::Trait);
1589 let defaulted_doc = reader::get_doc(trait_doc, tag_defaulted_trait);
1590 reader::doc_as_u8(defaulted_doc) != 0
1593 pub fn is_default_impl(cdata: Cmd, impl_id: DefIndex) -> bool {
1594 let impl_doc = cdata.lookup_item(impl_id);
1595 item_family(impl_doc) == Family::DefaultImpl
1598 pub fn get_imported_filemaps(metadata: &[u8]) -> Vec<syntax_pos::FileMap> {
1599 let crate_doc = rbml::Doc::new(metadata);
1600 let cm_doc = reader::get_doc(crate_doc, tag_codemap);
1602 reader::tagged_docs(cm_doc, tag_codemap_filemap).map(|filemap_doc| {
1603 let mut decoder = reader::Decoder::new(filemap_doc);
1604 decoder.read_opaque(|opaque_decoder, _| {
1605 Decodable::decode(opaque_decoder)
1610 pub fn closure_kind(cdata: Cmd, closure_id: DefIndex) -> ty::ClosureKind {
1611 let closure_doc = cdata.lookup_item(closure_id);
1612 let closure_kind_doc = reader::get_doc(closure_doc, tag_items_closure_kind);
1613 let mut decoder = reader::Decoder::new(closure_kind_doc);
1614 ty::ClosureKind::decode(&mut decoder).unwrap()
1617 pub fn closure_ty<'a, 'tcx>(cdata: Cmd, closure_id: DefIndex, tcx: TyCtxt<'a, 'tcx, 'tcx>)
1618 -> ty::ClosureTy<'tcx> {
1619 let closure_doc = cdata.lookup_item(closure_id);
1620 let closure_ty_doc = reader::get_doc(closure_doc, tag_items_closure_ty);
1621 TyDecoder::with_doc(tcx, cdata.cnum, closure_ty_doc, &mut |did| translate_def_id(cdata, did))
1625 pub fn def_key(cdata: Cmd, id: DefIndex) -> hir_map::DefKey {
1626 debug!("def_key: id={:?}", id);
1627 let item_doc = cdata.lookup_item(id);
1628 item_def_key(item_doc)
1631 fn item_def_key(item_doc: rbml::Doc) -> hir_map::DefKey {
1632 match reader::maybe_get_doc(item_doc, tag_def_key) {
1633 Some(def_key_doc) => {
1634 let mut decoder = reader::Decoder::new(def_key_doc);
1635 let simple_key = def_key::DefKey::decode(&mut decoder).unwrap();
1636 let name = reader::maybe_get_doc(item_doc, tag_paths_data_name).map(|name| {
1637 token::intern(name.as_str()).as_str()
1639 def_key::recover_def_key(simple_key, name)
1642 bug!("failed to find block with tag {:?} for item with family {:?}",
1644 item_family(item_doc))
1649 pub fn def_path(cdata: Cmd, id: DefIndex) -> hir_map::DefPath {
1650 debug!("def_path(id={:?})", id);
1651 hir_map::DefPath::make(cdata.cnum, id, |parent| def_key(cdata, parent))
1654 pub fn get_panic_strategy(data: &[u8]) -> PanicStrategy {
1655 let crate_doc = rbml::Doc::new(data);
1656 let strat_doc = reader::get_doc(crate_doc, tag_panic_strategy);
1657 match reader::doc_as_u8(strat_doc) {
1658 b'U' => PanicStrategy::Unwind,
1659 b'A' => PanicStrategy::Abort,
1660 b => panic!("unknown panic strategy in metadata: {}", b),