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)]
15 pub use self::DefLike::*;
18 use front::map as hir_map;
22 use metadata::cstore::crate_metadata;
23 use metadata::cstore::LOCAL_CRATE;
24 use metadata::common::*;
25 use metadata::csearch::MethodInfo;
26 use metadata::csearch;
28 use metadata::encoder::def_to_u64;
30 use metadata::inline::InlinedItem;
31 use metadata::tydecode::TyDecoder;
33 use middle::def_id::DefId;
34 use middle::lang_items;
36 use middle::ty::{ImplContainer, TraitContainer};
37 use middle::ty::{self, RegionEscape, Ty};
38 use util::nodemap::FnvHashMap;
40 use std::cell::{Cell, RefCell};
41 use std::io::prelude::*;
48 use serialize::Decodable;
50 use syntax::parse::token::{IdentInterner, special_idents};
51 use syntax::parse::token;
55 use syntax::print::pprust;
59 pub type Cmd<'a> = &'a crate_metadata;
62 fn get_item(&self, item_id: ast::NodeId) -> Option<rbml::Doc> {
63 self.index.lookup_item(self.data(), item_id).map(|pos| {
64 reader::doc_at(self.data(), pos as usize).unwrap().doc
68 fn lookup_item(&self, item_id: ast::NodeId) -> rbml::Doc {
69 match self.get_item(item_id) {
70 None => panic!("lookup_item: id not found: {}", item_id),
76 pub fn load_index(data: &[u8]) -> index::Index {
77 let index = reader::get_doc(rbml::Doc::new(data), tag_index);
78 index::Index::from_buf(index.data, index.start, index.end)
81 pub fn crate_rustc_version(data: &[u8]) -> Option<String> {
82 let doc = rbml::Doc::new(data);
83 reader::maybe_get_doc(doc, tag_rustc_version).map(|s| s.as_str())
86 #[derive(Debug, PartialEq)]
109 fn item_family(item: rbml::Doc) -> Family {
110 let fam = reader::get_doc(item, tag_items_data_item_family);
111 match reader::doc_as_u8(fam) as char {
124 'V' => StructVariant,
130 'N' => InheritedField,
131 c => panic!("unexpected family char: {}", c)
135 fn item_visibility(item: rbml::Doc) -> hir::Visibility {
136 match reader::maybe_get_doc(item, tag_items_data_item_visibility) {
138 Some(visibility_doc) => {
139 match reader::doc_as_u8(visibility_doc) as char {
141 'i' => hir::Inherited,
142 _ => panic!("unknown visibility character")
148 fn fn_constness(item: rbml::Doc) -> hir::Constness {
149 match reader::maybe_get_doc(item, tag_items_data_item_constness) {
150 None => hir::Constness::NotConst,
151 Some(constness_doc) => {
152 match reader::doc_as_u8(constness_doc) as char {
153 'c' => hir::Constness::Const,
154 'n' => hir::Constness::NotConst,
155 _ => panic!("unknown constness character")
161 fn item_sort(item: rbml::Doc) -> Option<char> {
162 reader::tagged_docs(item, tag_item_trait_item_sort).nth(0).map(|doc| {
163 doc.as_str_slice().as_bytes()[0] as char
167 fn item_symbol(item: rbml::Doc) -> String {
168 reader::get_doc(item, tag_items_data_item_symbol).as_str().to_string()
171 fn translated_def_id(cdata: Cmd, d: rbml::Doc) -> DefId {
172 let id = reader::doc_as_u64(d);
173 let def_id = DefId { krate: (id >> 32) as u32, xxx_node: id as u32 };
174 translate_def_id(cdata, def_id)
177 fn item_parent_item(cdata: Cmd, d: rbml::Doc) -> Option<DefId> {
178 reader::tagged_docs(d, tag_items_data_parent_item).nth(0).map(|did| {
179 translated_def_id(cdata, did)
183 fn item_require_parent_item(cdata: Cmd, d: rbml::Doc) -> DefId {
184 translated_def_id(cdata, reader::get_doc(d, tag_items_data_parent_item))
187 fn item_def_id(d: rbml::Doc, cdata: Cmd) -> DefId {
188 translated_def_id(cdata, reader::get_doc(d, tag_def_id))
191 fn reexports<'a>(d: rbml::Doc<'a>) -> reader::TaggedDocsIterator<'a> {
192 reader::tagged_docs(d, tag_items_data_item_reexport)
195 fn variant_disr_val(d: rbml::Doc) -> Option<ty::Disr> {
196 reader::maybe_get_doc(d, tag_disr_val).and_then(|val_doc| {
197 reader::with_doc_data(val_doc, |data| {
198 str::from_utf8(data).ok().and_then(|s| s.parse().ok())
203 fn doc_type<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
204 let tp = reader::get_doc(doc, tag_items_data_item_type);
205 TyDecoder::with_doc(tcx, cdata.cnum, tp,
206 &mut |_, did| translate_def_id(cdata, did))
210 fn maybe_doc_type<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Option<Ty<'tcx>> {
211 reader::maybe_get_doc(doc, tag_items_data_item_type).map(|tp| {
212 TyDecoder::with_doc(tcx, cdata.cnum, tp,
213 &mut |_, did| translate_def_id(cdata, did))
218 fn doc_method_fty<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>,
219 cdata: Cmd) -> ty::BareFnTy<'tcx> {
220 let tp = reader::get_doc(doc, tag_item_method_fty);
221 TyDecoder::with_doc(tcx, cdata.cnum, tp,
222 &mut |_, did| translate_def_id(cdata, did))
226 pub fn item_type<'tcx>(_item_id: DefId, item: rbml::Doc,
227 tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
228 doc_type(item, tcx, cdata)
231 fn doc_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
232 -> ty::TraitRef<'tcx> {
233 TyDecoder::with_doc(tcx, cdata.cnum, doc,
234 &mut |_, did| translate_def_id(cdata, did))
238 fn item_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
239 -> ty::TraitRef<'tcx> {
240 let tp = reader::get_doc(doc, tag_item_trait_ref);
241 doc_trait_ref(tp, tcx, cdata)
244 fn item_path(item_doc: rbml::Doc) -> Vec<hir_map::PathElem> {
245 let path_doc = reader::get_doc(item_doc, tag_path);
246 reader::docs(path_doc).filter_map(|(tag, elt_doc)| {
247 if tag == tag_path_elem_mod {
248 let s = elt_doc.as_str_slice();
249 Some(hir_map::PathMod(token::intern(s)))
250 } else if tag == tag_path_elem_name {
251 let s = elt_doc.as_str_slice();
252 Some(hir_map::PathName(token::intern(s)))
254 // ignore tag_path_len element
260 fn item_name(intr: &IdentInterner, item: rbml::Doc) -> ast::Name {
261 let name = reader::get_doc(item, tag_paths_data_name);
262 let string = name.as_str_slice();
263 match intr.find(string) {
264 None => token::intern(string),
269 fn item_to_def_like(cdata: Cmd, item: rbml::Doc, did: DefId) -> DefLike {
270 let fam = item_family(item);
273 // Check whether we have an associated const item.
274 match item_sort(item) {
275 Some('C') | Some('c') => {
276 DlDef(def::DefAssociatedConst(did))
279 // Regular const item.
280 DlDef(def::DefConst(did))
284 ImmStatic => DlDef(def::DefStatic(did, false)),
285 MutStatic => DlDef(def::DefStatic(did, true)),
286 Struct => DlDef(def::DefStruct(did)),
287 Fn => DlDef(def::DefFn(did, false)),
288 CtorFn => DlDef(def::DefFn(did, true)),
289 Method | StaticMethod => {
290 DlDef(def::DefMethod(did))
293 if item_sort(item) == Some('t') {
294 let trait_did = item_require_parent_item(cdata, item);
295 DlDef(def::DefAssociatedTy(trait_did, did))
297 DlDef(def::DefTy(did, false))
300 Mod => DlDef(def::DefMod(did)),
301 ForeignMod => DlDef(def::DefForeignMod(did)),
303 let enum_did = item_require_parent_item(cdata, item);
304 DlDef(def::DefVariant(enum_did, did, true))
307 let enum_did = item_require_parent_item(cdata, item);
308 DlDef(def::DefVariant(enum_did, did, false))
310 Trait => DlDef(def::DefTrait(did)),
311 Enum => DlDef(def::DefTy(did, true)),
312 Impl | DefaultImpl => DlImpl(did),
313 PublicField | InheritedField => DlField,
317 fn parse_unsafety(item_doc: rbml::Doc) -> hir::Unsafety {
318 let unsafety_doc = reader::get_doc(item_doc, tag_unsafety);
319 if reader::doc_as_u8(unsafety_doc) != 0 {
320 hir::Unsafety::Unsafe
322 hir::Unsafety::Normal
326 fn parse_paren_sugar(item_doc: rbml::Doc) -> bool {
327 let paren_sugar_doc = reader::get_doc(item_doc, tag_paren_sugar);
328 reader::doc_as_u8(paren_sugar_doc) != 0
331 fn parse_polarity(item_doc: rbml::Doc) -> hir::ImplPolarity {
332 let polarity_doc = reader::get_doc(item_doc, tag_polarity);
333 if reader::doc_as_u8(polarity_doc) != 0 {
334 hir::ImplPolarity::Negative
336 hir::ImplPolarity::Positive
340 fn parse_associated_type_names(item_doc: rbml::Doc) -> Vec<ast::Name> {
341 let names_doc = reader::get_doc(item_doc, tag_associated_type_names);
342 reader::tagged_docs(names_doc, tag_associated_type_name)
343 .map(|name_doc| token::intern(name_doc.as_str_slice()))
347 pub fn get_trait_def<'tcx>(cdata: Cmd,
348 item_id: ast::NodeId,
349 tcx: &ty::ctxt<'tcx>) -> ty::TraitDef<'tcx>
351 let item_doc = cdata.lookup_item(item_id);
352 let generics = doc_generics(item_doc, tcx, cdata, tag_item_generics);
353 let unsafety = parse_unsafety(item_doc);
354 let associated_type_names = parse_associated_type_names(item_doc);
355 let paren_sugar = parse_paren_sugar(item_doc);
358 paren_sugar: paren_sugar,
361 trait_ref: item_trait_ref(item_doc, tcx, cdata),
362 associated_type_names: associated_type_names,
363 nonblanket_impls: RefCell::new(FnvHashMap()),
364 blanket_impls: RefCell::new(vec![]),
365 flags: Cell::new(ty::TraitFlags::NO_TRAIT_FLAGS)
369 pub fn get_adt_def<'tcx>(intr: &IdentInterner,
371 item_id: ast::NodeId,
372 tcx: &ty::ctxt<'tcx>) -> ty::AdtDefMaster<'tcx>
374 fn get_enum_variants<'tcx>(intr: &IdentInterner,
377 tcx: &ty::ctxt<'tcx>) -> Vec<ty::VariantDefData<'tcx, 'tcx>> {
378 let mut disr_val = 0;
379 reader::tagged_docs(doc, tag_items_data_item_variant).map(|p| {
380 let did = translated_def_id(cdata, p);
381 let item = cdata.lookup_item(did.xxx_node);
383 if let Some(disr) = variant_disr_val(item) {
387 disr_val = disr_val.wrapping_add(1);
391 name: item_name(intr, item),
392 fields: get_variant_fields(intr, cdata, item, tcx),
397 fn get_variant_fields<'tcx>(intr: &IdentInterner,
400 tcx: &ty::ctxt<'tcx>) -> Vec<ty::FieldDefData<'tcx, 'tcx>> {
401 reader::tagged_docs(doc, tag_item_field).map(|f| {
402 let ff = item_family(f);
404 PublicField | InheritedField => {},
405 _ => tcx.sess.bug(&format!("expected field, found {:?}", ff))
407 ty::FieldDefData::new(item_def_id(f, cdata),
409 struct_field_family_to_visibility(ff))
410 }).chain(reader::tagged_docs(doc, tag_item_unnamed_field).map(|f| {
411 let ff = item_family(f);
412 ty::FieldDefData::new(item_def_id(f, cdata),
413 special_idents::unnamed_field.name,
414 struct_field_family_to_visibility(ff))
417 fn get_struct_variant<'tcx>(intr: &IdentInterner,
421 tcx: &ty::ctxt<'tcx>) -> ty::VariantDefData<'tcx, 'tcx> {
424 name: item_name(intr, doc),
425 fields: get_variant_fields(intr, cdata, doc, tcx),
430 let doc = cdata.lookup_item(item_id);
431 let did = DefId { krate: cdata.cnum, xxx_node: item_id };
432 let (kind, variants) = match item_family(doc) {
433 Enum => (ty::AdtKind::Enum,
434 get_enum_variants(intr, cdata, doc, tcx)),
435 Struct => (ty::AdtKind::Struct,
436 vec![get_struct_variant(intr, cdata, doc, did, tcx)]),
437 _ => tcx.sess.bug("get_adt_def called on a non-ADT")
440 let adt = tcx.intern_adt_def(did, kind, variants);
442 // this needs to be done *after* the variant is interned,
443 // to support recursive structures
444 for variant in &adt.variants {
445 if variant.kind() == ty::VariantKind::Tuple &&
446 adt.adt_kind() == ty::AdtKind::Enum {
447 // tuple-like enum variant fields aren't real items - get the types
449 debug!("evaluating the ctor-type of {:?}",
451 let ctor_ty = get_type(cdata, variant.did.xxx_node, tcx).ty;
452 debug!("evaluating the ctor-type of {:?}.. {:?}",
455 let field_tys = match ctor_ty.sty {
456 ty::TyBareFn(_, &ty::BareFnTy { sig: ty::Binder(ty::FnSig {
459 // tuple-struct constructors don't have escaping regions
460 assert!(!inputs.has_escaping_regions());
463 _ => tcx.sess.bug("tuple-variant ctor is not an ADT")
465 for (field, &ty) in variant.fields.iter().zip(field_tys.iter()) {
466 field.fulfill_ty(ty);
469 for field in &variant.fields {
470 debug!("evaluating the type of {:?}::{:?}", variant.name, field.name);
471 let ty = get_type(cdata, field.did.xxx_node, tcx).ty;
472 field.fulfill_ty(ty);
473 debug!("evaluating the type of {:?}::{:?}: {:?}",
474 variant.name, field.name, ty);
482 pub fn get_predicates<'tcx>(cdata: Cmd,
483 item_id: ast::NodeId,
484 tcx: &ty::ctxt<'tcx>)
485 -> ty::GenericPredicates<'tcx>
487 let item_doc = cdata.lookup_item(item_id);
488 doc_predicates(item_doc, tcx, cdata, tag_item_generics)
491 pub fn get_super_predicates<'tcx>(cdata: Cmd,
492 item_id: ast::NodeId,
493 tcx: &ty::ctxt<'tcx>)
494 -> ty::GenericPredicates<'tcx>
496 let item_doc = cdata.lookup_item(item_id);
497 doc_predicates(item_doc, tcx, cdata, tag_item_super_predicates)
500 pub fn get_type<'tcx>(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt<'tcx>)
501 -> ty::TypeScheme<'tcx>
503 let item_doc = cdata.lookup_item(id);
504 let t = item_type(DefId { krate: cdata.cnum, xxx_node: id }, item_doc, tcx,
506 let generics = doc_generics(item_doc, tcx, cdata, tag_item_generics);
513 pub fn get_stability(cdata: Cmd, id: ast::NodeId) -> Option<attr::Stability> {
514 let item = cdata.lookup_item(id);
515 reader::maybe_get_doc(item, tag_items_data_item_stability).map(|doc| {
516 let mut decoder = reader::Decoder::new(doc);
517 Decodable::decode(&mut decoder).unwrap()
521 pub fn get_repr_attrs(cdata: Cmd, id: ast::NodeId) -> Vec<attr::ReprAttr> {
522 let item = cdata.lookup_item(id);
523 match reader::maybe_get_doc(item, tag_items_data_item_repr).map(|doc| {
524 let mut decoder = reader::Decoder::new(doc);
525 Decodable::decode(&mut decoder).unwrap()
527 Some(attrs) => attrs,
532 pub fn get_impl_polarity<'tcx>(cdata: Cmd,
534 -> Option<hir::ImplPolarity>
536 let item_doc = cdata.lookup_item(id);
537 let fam = item_family(item_doc);
540 Some(parse_polarity(item_doc))
546 pub fn get_custom_coerce_unsized_kind<'tcx>(
549 -> Option<ty::adjustment::CustomCoerceUnsized>
551 let item_doc = cdata.lookup_item(id);
552 reader::maybe_get_doc(item_doc, tag_impl_coerce_unsized_kind).map(|kind_doc| {
553 let mut decoder = reader::Decoder::new(kind_doc);
554 Decodable::decode(&mut decoder).unwrap()
558 pub fn get_impl_trait<'tcx>(cdata: Cmd,
560 tcx: &ty::ctxt<'tcx>)
561 -> Option<ty::TraitRef<'tcx>>
563 let item_doc = cdata.lookup_item(id);
564 let fam = item_family(item_doc);
566 Family::Impl | Family::DefaultImpl => {
567 reader::maybe_get_doc(item_doc, tag_item_trait_ref).map(|tp| {
568 doc_trait_ref(tp, tcx, cdata)
575 pub fn get_symbol(cdata: Cmd, id: ast::NodeId) -> String {
576 return item_symbol(cdata.lookup_item(id));
579 /// If you have a crate_metadata, call get_symbol instead
580 pub fn get_symbol_from_buf(data: &[u8], id: ast::NodeId) -> String {
581 let index = load_index(data);
582 let pos = index.lookup_item(data, id).unwrap();
583 let doc = reader::doc_at(data, pos as usize).unwrap().doc;
587 // Something that a name can resolve to.
588 #[derive(Copy, Clone, Debug)]
595 /// Iterates over the language items in the given crate.
596 pub fn each_lang_item<F>(cdata: Cmd, mut f: F) -> bool where
597 F: FnMut(ast::NodeId, usize) -> bool,
599 let root = rbml::Doc::new(cdata.data());
600 let lang_items = reader::get_doc(root, tag_lang_items);
601 reader::tagged_docs(lang_items, tag_lang_items_item).all(|item_doc| {
602 let id_doc = reader::get_doc(item_doc, tag_lang_items_item_id);
603 let id = reader::doc_as_u32(id_doc) as usize;
604 let node_id_doc = reader::get_doc(item_doc,
605 tag_lang_items_item_node_id);
606 let node_id = reader::doc_as_u32(node_id_doc) as ast::NodeId;
612 fn each_child_of_item_or_crate<F, G>(intr: Rc<IdentInterner>,
615 mut get_crate_data: G,
616 mut callback: F) where
617 F: FnMut(DefLike, ast::Name, hir::Visibility),
618 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
620 // Iterate over all children.
621 for child_info_doc in reader::tagged_docs(item_doc, tag_mod_child) {
622 let child_def_id = translated_def_id(cdata, child_info_doc);
624 // This item may be in yet another crate if it was the child of a
626 let crate_data = if child_def_id.krate == cdata.cnum {
629 Some(get_crate_data(child_def_id.krate))
631 let crate_data = match crate_data {
632 Some(ref cdata) => &**cdata,
637 match crate_data.get_item(child_def_id.xxx_node) {
639 Some(child_item_doc) => {
640 // Hand off the item to the callback.
641 let child_name = item_name(&*intr, child_item_doc);
642 let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
643 let visibility = item_visibility(child_item_doc);
644 callback(def_like, child_name, visibility);
649 // As a special case, iterate over all static methods of
650 // associated implementations too. This is a bit of a botch.
652 for inherent_impl_def_id_doc in reader::tagged_docs(item_doc,
653 tag_items_data_item_inherent_impl) {
654 let inherent_impl_def_id = item_def_id(inherent_impl_def_id_doc, cdata);
655 if let Some(inherent_impl_doc) = cdata.get_item(inherent_impl_def_id.xxx_node) {
656 for impl_item_def_id_doc in reader::tagged_docs(inherent_impl_doc,
657 tag_item_impl_item) {
658 let impl_item_def_id = item_def_id(impl_item_def_id_doc,
660 if let Some(impl_method_doc) = cdata.get_item(impl_item_def_id.xxx_node) {
661 if let StaticMethod = item_family(impl_method_doc) {
662 // Hand off the static method to the callback.
663 let static_method_name = item_name(&*intr, impl_method_doc);
664 let static_method_def_like = item_to_def_like(cdata, impl_method_doc,
666 callback(static_method_def_like,
668 item_visibility(impl_method_doc));
675 for reexport_doc in reexports(item_doc) {
676 let def_id_doc = reader::get_doc(reexport_doc,
677 tag_items_data_item_reexport_def_id);
678 let child_def_id = translated_def_id(cdata, def_id_doc);
680 let name_doc = reader::get_doc(reexport_doc,
681 tag_items_data_item_reexport_name);
682 let name = name_doc.as_str_slice();
684 // This reexport may be in yet another crate.
685 let crate_data = if child_def_id.krate == cdata.cnum {
688 Some(get_crate_data(child_def_id.krate))
690 let crate_data = match crate_data {
691 Some(ref cdata) => &**cdata,
696 if let Some(child_item_doc) = crate_data.get_item(child_def_id.xxx_node) {
697 // Hand off the item to the callback.
698 let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
699 // These items have a public visibility because they're part of
700 // a public re-export.
701 callback(def_like, token::intern(name), hir::Public);
706 /// Iterates over each child of the given item.
707 pub fn each_child_of_item<F, G>(intr: Rc<IdentInterner>,
712 F: FnMut(DefLike, ast::Name, hir::Visibility),
713 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
716 let item_doc = match cdata.get_item(id) {
718 Some(item_doc) => item_doc,
721 each_child_of_item_or_crate(intr,
728 /// Iterates over all the top-level crate items.
729 pub fn each_top_level_item_of_crate<F, G>(intr: Rc<IdentInterner>,
733 F: FnMut(DefLike, ast::Name, hir::Visibility),
734 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
736 let root_doc = rbml::Doc::new(cdata.data());
737 let misc_info_doc = reader::get_doc(root_doc, tag_misc_info);
738 let crate_items_doc = reader::get_doc(misc_info_doc,
739 tag_misc_info_crate_items);
741 each_child_of_item_or_crate(intr,
748 pub fn get_item_path(cdata: Cmd, id: ast::NodeId) -> Vec<hir_map::PathElem> {
749 item_path(cdata.lookup_item(id))
752 pub fn get_item_name(intr: &IdentInterner, cdata: Cmd, id: ast::NodeId) -> ast::Name {
753 item_name(intr, cdata.lookup_item(id))
756 pub type DecodeInlinedItem<'a> =
757 Box<for<'tcx> FnMut(Cmd,
759 Vec<hir_map::PathElem>,
761 -> Result<&'tcx InlinedItem, Vec<hir_map::PathElem>> + 'a>;
763 pub fn maybe_get_item_ast<'tcx>(cdata: Cmd, tcx: &ty::ctxt<'tcx>, id: ast::NodeId,
764 mut decode_inlined_item: DecodeInlinedItem)
765 -> csearch::FoundAst<'tcx> {
766 debug!("Looking up item: {}", id);
767 let item_doc = cdata.lookup_item(id);
768 let path = item_path(item_doc).split_last().unwrap().1.to_vec();
769 match decode_inlined_item(cdata, tcx, path, item_doc) {
770 Ok(ii) => csearch::FoundAst::Found(ii),
772 match item_parent_item(cdata, item_doc) {
774 let parent_item = cdata.lookup_item(did.xxx_node);
775 match decode_inlined_item(cdata, tcx, path, parent_item) {
776 Ok(ii) => csearch::FoundAst::FoundParent(did, ii),
777 Err(_) => csearch::FoundAst::NotFound
780 None => csearch::FoundAst::NotFound
786 fn get_explicit_self(item: rbml::Doc) -> ty::ExplicitSelfCategory {
787 fn get_mutability(ch: u8) -> hir::Mutability {
789 'i' => hir::MutImmutable,
790 'm' => hir::MutMutable,
791 _ => panic!("unknown mutability character: `{}`", ch as char),
795 let explicit_self_doc = reader::get_doc(item, tag_item_trait_method_explicit_self);
796 let string = explicit_self_doc.as_str_slice();
798 let explicit_self_kind = string.as_bytes()[0];
799 match explicit_self_kind as char {
800 's' => ty::StaticExplicitSelfCategory,
801 'v' => ty::ByValueExplicitSelfCategory,
802 '~' => ty::ByBoxExplicitSelfCategory,
803 // FIXME(#4846) expl. region
805 ty::ByReferenceExplicitSelfCategory(
807 get_mutability(string.as_bytes()[1]))
809 _ => panic!("unknown self type code: `{}`", explicit_self_kind as char)
813 /// Returns the def IDs of all the items in the given implementation.
814 pub fn get_impl_items(cdata: Cmd, impl_id: ast::NodeId)
815 -> Vec<ty::ImplOrTraitItemId> {
816 reader::tagged_docs(cdata.lookup_item(impl_id), tag_item_impl_item).map(|doc| {
817 let def_id = item_def_id(doc, cdata);
818 match item_sort(doc) {
819 Some('C') | Some('c') => ty::ConstTraitItemId(def_id),
820 Some('r') | Some('p') => ty::MethodTraitItemId(def_id),
821 Some('t') => ty::TypeTraitItemId(def_id),
822 _ => panic!("unknown impl item sort"),
827 pub fn get_trait_name(intr: Rc<IdentInterner>,
831 let doc = cdata.lookup_item(id);
832 item_name(&*intr, doc)
835 pub fn is_static_method(cdata: Cmd, id: ast::NodeId) -> bool {
836 let doc = cdata.lookup_item(id);
837 match item_sort(doc) {
838 Some('r') | Some('p') => {
839 get_explicit_self(doc) == ty::StaticExplicitSelfCategory
845 pub fn get_impl_or_trait_item<'tcx>(intr: Rc<IdentInterner>,
848 tcx: &ty::ctxt<'tcx>)
849 -> ty::ImplOrTraitItem<'tcx> {
850 let item_doc = cdata.lookup_item(id);
852 let def_id = item_def_id(item_doc, cdata);
854 let container_id = item_require_parent_item(cdata, item_doc);
855 let container_doc = cdata.lookup_item(container_id.xxx_node);
856 let container = match item_family(container_doc) {
857 Trait => TraitContainer(container_id),
858 _ => ImplContainer(container_id),
861 let name = item_name(&*intr, item_doc);
862 let vis = item_visibility(item_doc);
864 match item_sort(item_doc) {
865 sort @ Some('C') | sort @ Some('c') => {
866 let ty = doc_type(item_doc, tcx, cdata);
867 ty::ConstTraitItem(Rc::new(ty::AssociatedConst {
872 container: container,
873 has_value: sort == Some('C')
876 Some('r') | Some('p') => {
877 let generics = doc_generics(item_doc, tcx, cdata, tag_method_ty_generics);
878 let predicates = doc_predicates(item_doc, tcx, cdata, tag_method_ty_generics);
879 let fty = doc_method_fty(item_doc, tcx, cdata);
880 let explicit_self = get_explicit_self(item_doc);
882 ty::MethodTraitItem(Rc::new(ty::Method::new(name,
892 let ty = maybe_doc_type(item_doc, tcx, cdata);
893 ty::TypeTraitItem(Rc::new(ty::AssociatedType {
898 container: container,
901 _ => panic!("unknown impl/trait item sort"),
905 pub fn get_trait_item_def_ids(cdata: Cmd, id: ast::NodeId)
906 -> Vec<ty::ImplOrTraitItemId> {
907 let item = cdata.lookup_item(id);
908 reader::tagged_docs(item, tag_item_trait_item).map(|mth| {
909 let def_id = item_def_id(mth, cdata);
910 match item_sort(mth) {
911 Some('C') | Some('c') => ty::ConstTraitItemId(def_id),
912 Some('r') | Some('p') => ty::MethodTraitItemId(def_id),
913 Some('t') => ty::TypeTraitItemId(def_id),
914 _ => panic!("unknown trait item sort"),
919 pub fn get_item_variances(cdata: Cmd, id: ast::NodeId) -> ty::ItemVariances {
920 let item_doc = cdata.lookup_item(id);
921 let variance_doc = reader::get_doc(item_doc, tag_item_variances);
922 let mut decoder = reader::Decoder::new(variance_doc);
923 Decodable::decode(&mut decoder).unwrap()
926 pub fn get_provided_trait_methods<'tcx>(intr: Rc<IdentInterner>,
929 tcx: &ty::ctxt<'tcx>)
930 -> Vec<Rc<ty::Method<'tcx>>> {
931 let item = cdata.lookup_item(id);
933 reader::tagged_docs(item, tag_item_trait_item).filter_map(|mth_id| {
934 let did = item_def_id(mth_id, cdata);
935 let mth = cdata.lookup_item(did.xxx_node);
937 if item_sort(mth) == Some('p') {
938 let trait_item = get_impl_or_trait_item(intr.clone(),
942 if let ty::MethodTraitItem(ref method) = trait_item {
943 Some((*method).clone())
953 pub fn get_associated_consts<'tcx>(intr: Rc<IdentInterner>,
956 tcx: &ty::ctxt<'tcx>)
957 -> Vec<Rc<ty::AssociatedConst<'tcx>>> {
958 let item = cdata.lookup_item(id);
960 [tag_item_trait_item, tag_item_impl_item].iter().flat_map(|&tag| {
961 reader::tagged_docs(item, tag).filter_map(|ac_id| {
962 let did = item_def_id(ac_id, cdata);
963 let ac_doc = cdata.lookup_item(did.xxx_node);
965 match item_sort(ac_doc) {
966 Some('C') | Some('c') => {
967 let trait_item = get_impl_or_trait_item(intr.clone(),
971 if let ty::ConstTraitItem(ref ac) = trait_item {
983 pub fn get_type_name_if_impl(cdata: Cmd,
984 node_id: ast::NodeId) -> Option<ast::Name> {
985 let item = cdata.lookup_item(node_id);
986 if item_family(item) != Impl {
990 reader::tagged_docs(item, tag_item_impl_type_basename).nth(0).map(|doc| {
991 token::intern(doc.as_str_slice())
995 pub fn get_methods_if_impl(intr: Rc<IdentInterner>,
997 node_id: ast::NodeId)
998 -> Option<Vec<MethodInfo> > {
999 let item = cdata.lookup_item(node_id);
1000 if item_family(item) != Impl {
1004 // If this impl implements a trait, don't consider it.
1005 if reader::tagged_docs(item, tag_item_trait_ref).next().is_some() {
1009 let impl_method_ids = reader::tagged_docs(item, tag_item_impl_item)
1010 .map(|impl_method_doc| item_def_id(impl_method_doc, cdata));
1012 let mut impl_methods = Vec::new();
1013 for impl_method_id in impl_method_ids {
1014 let impl_method_doc = cdata.lookup_item(impl_method_id.xxx_node);
1015 let family = item_family(impl_method_doc);
1017 StaticMethod | Method => {
1018 impl_methods.push(MethodInfo {
1019 name: item_name(&*intr, impl_method_doc),
1020 def_id: item_def_id(impl_method_doc, cdata),
1021 vis: item_visibility(impl_method_doc),
1028 return Some(impl_methods);
1031 /// If node_id is the constructor of a tuple struct, retrieve the NodeId of
1032 /// the actual type definition, otherwise, return None
1033 pub fn get_tuple_struct_definition_if_ctor(cdata: Cmd,
1034 node_id: ast::NodeId)
1037 let item = cdata.lookup_item(node_id);
1038 reader::tagged_docs(item, tag_items_data_item_is_tuple_struct_ctor).next().map(|_| {
1039 item_require_parent_item(cdata, item)
1043 pub fn get_item_attrs(cdata: Cmd,
1044 orig_node_id: ast::NodeId)
1045 -> Vec<ast::Attribute> {
1046 // The attributes for a tuple struct are attached to the definition, not the ctor;
1047 // we assume that someone passing in a tuple struct ctor is actually wanting to
1048 // look at the definition
1049 let node_id = get_tuple_struct_definition_if_ctor(cdata, orig_node_id);
1050 let node_id = node_id.map(|x| x.xxx_node).unwrap_or(orig_node_id);
1051 let item = cdata.lookup_item(node_id);
1052 get_attributes(item)
1055 pub fn get_struct_field_attrs(cdata: Cmd) -> FnvHashMap<ast::NodeId, Vec<ast::Attribute>> {
1056 let data = rbml::Doc::new(cdata.data());
1057 let fields = reader::get_doc(data, tag_struct_fields);
1058 reader::tagged_docs(fields, tag_struct_field).map(|field| {
1059 let id = reader::doc_as_u32(reader::get_doc(field, tag_struct_field_id));
1060 let attrs = get_attributes(field);
1065 fn struct_field_family_to_visibility(family: Family) -> hir::Visibility {
1067 PublicField => hir::Public,
1068 InheritedField => hir::Inherited,
1073 pub fn get_struct_field_names(intr: &IdentInterner, cdata: Cmd, id: ast::NodeId)
1075 let item = cdata.lookup_item(id);
1076 reader::tagged_docs(item, tag_item_field).map(|an_item| {
1077 item_name(intr, an_item)
1078 }).chain(reader::tagged_docs(item, tag_item_unnamed_field).map(|_| {
1079 special_idents::unnamed_field.name
1083 fn get_meta_items(md: rbml::Doc) -> Vec<P<ast::MetaItem>> {
1084 reader::tagged_docs(md, tag_meta_item_word).map(|meta_item_doc| {
1085 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1086 let n = token::intern_and_get_ident(nd.as_str_slice());
1087 attr::mk_word_item(n)
1088 }).chain(reader::tagged_docs(md, tag_meta_item_name_value).map(|meta_item_doc| {
1089 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1090 let vd = reader::get_doc(meta_item_doc, tag_meta_item_value);
1091 let n = token::intern_and_get_ident(nd.as_str_slice());
1092 let v = token::intern_and_get_ident(vd.as_str_slice());
1093 // FIXME (#623): Should be able to decode MetaNameValue variants,
1094 // but currently the encoder just drops them
1095 attr::mk_name_value_item_str(n, v)
1096 })).chain(reader::tagged_docs(md, tag_meta_item_list).map(|meta_item_doc| {
1097 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1098 let n = token::intern_and_get_ident(nd.as_str_slice());
1099 let subitems = get_meta_items(meta_item_doc);
1100 attr::mk_list_item(n, subitems)
1104 fn get_attributes(md: rbml::Doc) -> Vec<ast::Attribute> {
1105 match reader::maybe_get_doc(md, tag_attributes) {
1107 reader::tagged_docs(attrs_d, tag_attribute).map(|attr_doc| {
1108 let is_sugared_doc = reader::doc_as_u8(
1109 reader::get_doc(attr_doc, tag_attribute_is_sugared_doc)
1111 let meta_items = get_meta_items(attr_doc);
1112 // Currently it's only possible to have a single meta item on
1114 assert_eq!(meta_items.len(), 1);
1115 let meta_item = meta_items.into_iter().nth(0).unwrap();
1117 node: ast::Attribute_ {
1118 id: attr::mk_attr_id(),
1119 style: ast::AttrOuter,
1121 is_sugared_doc: is_sugared_doc,
1123 span: codemap::DUMMY_SP
1131 fn list_crate_attributes(md: rbml::Doc, hash: &Svh,
1132 out: &mut io::Write) -> io::Result<()> {
1133 try!(write!(out, "=Crate Attributes ({})=\n", *hash));
1135 let r = get_attributes(md);
1137 try!(write!(out, "{}\n", pprust::attribute_to_string(attr)));
1143 pub fn get_crate_attributes(data: &[u8]) -> Vec<ast::Attribute> {
1144 get_attributes(rbml::Doc::new(data))
1148 pub struct CrateDep {
1149 pub cnum: ast::CrateNum,
1152 pub explicitly_linked: bool,
1155 pub fn get_crate_deps(data: &[u8]) -> Vec<CrateDep> {
1156 let cratedoc = rbml::Doc::new(data);
1157 let depsdoc = reader::get_doc(cratedoc, tag_crate_deps);
1159 fn docstr(doc: rbml::Doc, tag_: usize) -> String {
1160 let d = reader::get_doc(doc, tag_);
1161 d.as_str_slice().to_string()
1164 reader::tagged_docs(depsdoc, tag_crate_dep).enumerate().map(|(crate_num, depdoc)| {
1165 let name = docstr(depdoc, tag_crate_dep_crate_name);
1166 let hash = Svh::new(&docstr(depdoc, tag_crate_dep_hash));
1167 let doc = reader::get_doc(depdoc, tag_crate_dep_explicitly_linked);
1168 let explicitly_linked = reader::doc_as_u8(doc) != 0;
1170 cnum: crate_num as u32 + 1,
1173 explicitly_linked: explicitly_linked,
1178 fn list_crate_deps(data: &[u8], out: &mut io::Write) -> io::Result<()> {
1179 try!(write!(out, "=External Dependencies=\n"));
1180 for dep in &get_crate_deps(data) {
1181 try!(write!(out, "{} {}-{}\n", dep.cnum, dep.name, dep.hash));
1183 try!(write!(out, "\n"));
1187 pub fn maybe_get_crate_hash(data: &[u8]) -> Option<Svh> {
1188 let cratedoc = rbml::Doc::new(data);
1189 reader::maybe_get_doc(cratedoc, tag_crate_hash).map(|doc| {
1190 Svh::new(doc.as_str_slice())
1194 pub fn get_crate_hash(data: &[u8]) -> Svh {
1195 let cratedoc = rbml::Doc::new(data);
1196 let hashdoc = reader::get_doc(cratedoc, tag_crate_hash);
1197 Svh::new(hashdoc.as_str_slice())
1200 pub fn maybe_get_crate_name(data: &[u8]) -> Option<String> {
1201 let cratedoc = rbml::Doc::new(data);
1202 reader::maybe_get_doc(cratedoc, tag_crate_crate_name).map(|doc| {
1203 doc.as_str_slice().to_string()
1207 pub fn get_crate_triple(data: &[u8]) -> Option<String> {
1208 let cratedoc = rbml::Doc::new(data);
1209 let triple_doc = reader::maybe_get_doc(cratedoc, tag_crate_triple);
1210 triple_doc.map(|s| s.as_str().to_string())
1213 pub fn get_crate_name(data: &[u8]) -> String {
1214 maybe_get_crate_name(data).expect("no crate name in crate")
1217 pub fn list_crate_metadata(bytes: &[u8], out: &mut io::Write) -> io::Result<()> {
1218 let hash = get_crate_hash(bytes);
1219 let md = rbml::Doc::new(bytes);
1220 try!(list_crate_attributes(md, &hash, out));
1221 list_crate_deps(bytes, out)
1224 // Translates a def_id from an external crate to a def_id for the current
1225 // compilation environment. We use this when trying to load types from
1226 // external crates - if those types further refer to types in other crates
1227 // then we must translate the crate number from that encoded in the external
1228 // crate to the correct local crate number.
1229 pub fn translate_def_id(cdata: Cmd, did: DefId) -> DefId {
1231 return DefId { krate: cdata.cnum, xxx_node: did.xxx_node };
1234 match cdata.cnum_map.borrow().get(&did.krate) {
1238 xxx_node: did.xxx_node,
1241 None => panic!("didn't find a crate in the cnum_map")
1245 // Translate a DefId from the current compilation environment to a DefId
1246 // for an external crate.
1247 fn reverse_translate_def_id(cdata: Cmd, did: DefId) -> Option<DefId> {
1248 if did.krate == cdata.cnum {
1249 return Some(DefId { krate: LOCAL_CRATE, xxx_node: did.xxx_node });
1252 for (&local, &global) in cdata.cnum_map.borrow().iter() {
1253 if global == did.krate {
1254 return Some(DefId { krate: local, xxx_node: did.xxx_node });
1261 pub fn each_inherent_implementation_for_type<F>(cdata: Cmd,
1264 where F: FnMut(DefId),
1266 let item_doc = cdata.lookup_item(id);
1267 for impl_doc in reader::tagged_docs(item_doc, tag_items_data_item_inherent_impl) {
1268 if reader::maybe_get_doc(impl_doc, tag_item_trait_ref).is_none() {
1269 callback(item_def_id(impl_doc, cdata));
1274 pub fn each_implementation_for_trait<F>(cdata: Cmd,
1276 mut callback: F) where
1279 if cdata.cnum == def_id.krate {
1280 let item_doc = cdata.lookup_item(def_id.xxx_node);
1281 for impl_doc in reader::tagged_docs(item_doc, tag_items_data_item_extension_impl) {
1282 callback(item_def_id(impl_doc, cdata));
1287 // Do a reverse lookup beforehand to avoid touching the crate_num
1288 // hash map in the loop below.
1289 if let Some(crate_local_did) = reverse_translate_def_id(cdata, def_id) {
1290 let def_id_u64 = def_to_u64(crate_local_did);
1292 let impls_doc = reader::get_doc(rbml::Doc::new(cdata.data()), tag_impls);
1293 for impl_doc in reader::tagged_docs(impls_doc, tag_impls_impl) {
1294 let impl_trait = reader::get_doc(impl_doc, tag_impls_impl_trait_def_id);
1295 if reader::doc_as_u64(impl_trait) == def_id_u64 {
1296 callback(item_def_id(impl_doc, cdata));
1302 pub fn get_trait_of_item(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt)
1304 let item_doc = cdata.lookup_item(id);
1305 let parent_item_id = match item_parent_item(cdata, item_doc) {
1306 None => return None,
1307 Some(item_id) => item_id,
1309 let parent_item_doc = cdata.lookup_item(parent_item_id.xxx_node);
1310 match item_family(parent_item_doc) {
1311 Trait => Some(item_def_id(parent_item_doc, cdata)),
1312 Impl | DefaultImpl => {
1313 reader::maybe_get_doc(parent_item_doc, tag_item_trait_ref)
1314 .map(|_| item_trait_ref(parent_item_doc, tcx, cdata).def_id)
1321 pub fn get_native_libraries(cdata: Cmd)
1322 -> Vec<(cstore::NativeLibraryKind, String)> {
1323 let libraries = reader::get_doc(rbml::Doc::new(cdata.data()),
1324 tag_native_libraries);
1325 reader::tagged_docs(libraries, tag_native_libraries_lib).map(|lib_doc| {
1326 let kind_doc = reader::get_doc(lib_doc, tag_native_libraries_kind);
1327 let name_doc = reader::get_doc(lib_doc, tag_native_libraries_name);
1328 let kind: cstore::NativeLibraryKind =
1329 cstore::NativeLibraryKind::from_u32(reader::doc_as_u32(kind_doc)).unwrap();
1330 let name = name_doc.as_str().to_string();
1335 pub fn get_plugin_registrar_fn(data: &[u8]) -> Option<ast::NodeId> {
1336 reader::maybe_get_doc(rbml::Doc::new(data), tag_plugin_registrar_fn)
1337 .map(|doc| reader::doc_as_u32(doc))
1340 pub fn each_exported_macro<F>(data: &[u8], intr: &IdentInterner, mut f: F) where
1341 F: FnMut(ast::Name, Vec<ast::Attribute>, String) -> bool,
1343 let macros = reader::get_doc(rbml::Doc::new(data), tag_macro_defs);
1344 for macro_doc in reader::tagged_docs(macros, tag_macro_def) {
1345 let name = item_name(intr, macro_doc);
1346 let attrs = get_attributes(macro_doc);
1347 let body = reader::get_doc(macro_doc, tag_macro_def_body);
1348 if !f(name, attrs, body.as_str().to_string()) {
1354 pub fn get_dylib_dependency_formats(cdata: Cmd)
1355 -> Vec<(ast::CrateNum, cstore::LinkagePreference)>
1357 let formats = reader::get_doc(rbml::Doc::new(cdata.data()),
1358 tag_dylib_dependency_formats);
1359 let mut result = Vec::new();
1361 debug!("found dylib deps: {}", formats.as_str_slice());
1362 for spec in formats.as_str_slice().split(',') {
1363 if spec.is_empty() { continue }
1364 let cnum = spec.split(':').nth(0).unwrap();
1365 let link = spec.split(':').nth(1).unwrap();
1366 let cnum: ast::CrateNum = cnum.parse().unwrap();
1367 let cnum = match cdata.cnum_map.borrow().get(&cnum) {
1369 None => panic!("didn't find a crate in the cnum_map")
1371 result.push((cnum, if link == "d" {
1372 cstore::RequireDynamic
1374 cstore::RequireStatic
1380 pub fn get_missing_lang_items(cdata: Cmd)
1381 -> Vec<lang_items::LangItem>
1383 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_lang_items);
1384 reader::tagged_docs(items, tag_lang_items_missing).map(|missing_docs| {
1385 lang_items::LangItem::from_u32(reader::doc_as_u32(missing_docs)).unwrap()
1389 pub fn get_method_arg_names(cdata: Cmd, id: ast::NodeId) -> Vec<String> {
1390 let method_doc = cdata.lookup_item(id);
1391 match reader::maybe_get_doc(method_doc, tag_method_argument_names) {
1393 reader::tagged_docs(args_doc, tag_method_argument_name).map(|name_doc| {
1394 name_doc.as_str_slice().to_string()
1401 pub fn get_reachable_ids(cdata: Cmd) -> Vec<DefId> {
1402 let items = reader::get_doc(rbml::Doc::new(cdata.data()),
1404 reader::tagged_docs(items, tag_reachable_id).map(|doc| {
1407 xxx_node: reader::doc_as_u32(doc),
1412 pub fn is_typedef(cdata: Cmd, id: ast::NodeId) -> bool {
1413 let item_doc = cdata.lookup_item(id);
1414 match item_family(item_doc) {
1420 pub fn is_const_fn(cdata: Cmd, id: ast::NodeId) -> bool {
1421 let item_doc = cdata.lookup_item(id);
1422 match fn_constness(item_doc) {
1423 hir::Constness::Const => true,
1424 hir::Constness::NotConst => false,
1428 pub fn is_impl(cdata: Cmd, id: ast::NodeId) -> bool {
1429 let item_doc = cdata.lookup_item(id);
1430 match item_family(item_doc) {
1436 fn doc_generics<'tcx>(base_doc: rbml::Doc,
1437 tcx: &ty::ctxt<'tcx>,
1440 -> ty::Generics<'tcx>
1442 let doc = reader::get_doc(base_doc, tag);
1444 let mut types = subst::VecPerParamSpace::empty();
1445 for p in reader::tagged_docs(doc, tag_type_param_def) {
1447 TyDecoder::with_doc(tcx, cdata.cnum, p,
1448 &mut |_, did| translate_def_id(cdata, did))
1449 .parse_type_param_def();
1450 types.push(bd.space, bd);
1453 let mut regions = subst::VecPerParamSpace::empty();
1454 for rp_doc in reader::tagged_docs(doc, tag_region_param_def) {
1455 let ident_str_doc = reader::get_doc(rp_doc,
1456 tag_region_param_def_ident);
1457 let name = item_name(&*token::get_ident_interner(), ident_str_doc);
1458 let def_id_doc = reader::get_doc(rp_doc,
1459 tag_region_param_def_def_id);
1460 let def_id = translated_def_id(cdata, def_id_doc);
1462 let doc = reader::get_doc(rp_doc, tag_region_param_def_space);
1463 let space = subst::ParamSpace::from_uint(reader::doc_as_u64(doc) as usize);
1465 let doc = reader::get_doc(rp_doc, tag_region_param_def_index);
1466 let index = reader::doc_as_u64(doc) as u32;
1468 let bounds = reader::tagged_docs(rp_doc, tag_items_data_region).map(|p| {
1469 TyDecoder::with_doc(tcx, cdata.cnum, p,
1470 &mut |_, did| translate_def_id(cdata, did))
1474 regions.push(space, ty::RegionParameterDef { name: name,
1481 ty::Generics { types: types, regions: regions }
1484 fn doc_predicates<'tcx>(base_doc: rbml::Doc,
1485 tcx: &ty::ctxt<'tcx>,
1488 -> ty::GenericPredicates<'tcx>
1490 let doc = reader::get_doc(base_doc, tag);
1492 let mut predicates = subst::VecPerParamSpace::empty();
1493 for predicate_doc in reader::tagged_docs(doc, tag_predicate) {
1494 let space_doc = reader::get_doc(predicate_doc, tag_predicate_space);
1495 let space = subst::ParamSpace::from_uint(reader::doc_as_u8(space_doc) as usize);
1497 let data_doc = reader::get_doc(predicate_doc, tag_predicate_data);
1499 TyDecoder::with_doc(tcx, cdata.cnum, data_doc,
1500 &mut |_, did| translate_def_id(cdata, did))
1503 predicates.push(space, data);
1506 ty::GenericPredicates { predicates: predicates }
1509 pub fn is_defaulted_trait(cdata: Cmd, trait_id: ast::NodeId) -> bool {
1510 let trait_doc = cdata.lookup_item(trait_id);
1511 assert!(item_family(trait_doc) == Family::Trait);
1512 let defaulted_doc = reader::get_doc(trait_doc, tag_defaulted_trait);
1513 reader::doc_as_u8(defaulted_doc) != 0
1516 pub fn is_default_impl(cdata: Cmd, impl_id: ast::NodeId) -> bool {
1517 let impl_doc = cdata.lookup_item(impl_id);
1518 item_family(impl_doc) == Family::DefaultImpl
1521 pub fn get_imported_filemaps(metadata: &[u8]) -> Vec<codemap::FileMap> {
1522 let crate_doc = rbml::Doc::new(metadata);
1523 let cm_doc = reader::get_doc(crate_doc, tag_codemap);
1525 reader::tagged_docs(cm_doc, tag_codemap_filemap).map(|filemap_doc| {
1526 let mut decoder = reader::Decoder::new(filemap_doc);
1527 Decodable::decode(&mut decoder).unwrap()
1531 pub fn is_extern_fn(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt) -> bool {
1532 let item_doc = match cdata.get_item(id) {
1534 None => return false,
1536 if let Fn = item_family(item_doc) {
1537 let ty::TypeScheme { generics, ty } = get_type(cdata, id, tcx);
1538 generics.types.is_empty() && match ty.sty {
1539 ty::TyBareFn(_, fn_ty) => fn_ty.abi != abi::Rust,