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::*;
19 use metadata::cstore::crate_metadata;
20 use metadata::common::*;
21 use metadata::csearch::MethodInfo;
22 use metadata::csearch;
24 use metadata::encoder::def_to_u64;
25 use metadata::tydecode::{parse_ty_data, parse_region_data,
26 parse_type_param_def_data, parse_bare_fn_ty_data,
27 parse_trait_ref_data, parse_predicate_data};
29 use middle::lang_items;
31 use middle::ty::{ImplContainer, TraitContainer};
32 use middle::ty::{self, Ty};
33 use middle::astencode::vtable_decoder_helpers;
34 use util::nodemap::FnvHashMap;
36 use std::cell::{Cell, RefCell};
37 use std::collections::HashMap;
38 use std::hash::{self, Hash, SipHasher};
39 use std::io::prelude::*;
42 use std::slice::bytes;
47 use serialize::Decodable;
50 use syntax::parse::token::{IdentInterner, special_idents};
51 use syntax::parse::token;
52 use syntax::print::pprust;
57 pub type Cmd<'a> = &'a crate_metadata;
59 // A function that takes a def_id relative to the crate being searched and
60 // returns a def_id relative to the compilation environment, i.e. if we hit a
61 // def_id for an item defined in another crate, somebody needs to figure out
62 // what crate that's in and give us a def_id that makes sense for the current
65 fn u32_from_be_bytes(bytes: &[u8]) -> u32 {
67 bytes::copy_memory(&bytes[..4], &mut b);
68 unsafe { (*(b.as_ptr() as *const u32)).to_be() }
71 fn lookup_hash<'a, F>(d: rbml::Doc<'a>, mut eq_fn: F, hash: u64) -> Option<rbml::Doc<'a>> where
72 F: FnMut(&[u8]) -> bool,
74 let index = reader::get_doc(d, tag_index);
75 let table = reader::get_doc(index, tag_index_table);
76 let hash_pos = table.start + (hash % 256 * 4) as usize;
77 let pos = u32_from_be_bytes(&d.data[hash_pos..]) as usize;
78 let tagged_doc = reader::doc_at(d.data, pos).unwrap();
80 let belt = tag_index_buckets_bucket_elt;
83 reader::tagged_docs(tagged_doc.doc, belt, |elt| {
84 let pos = u32_from_be_bytes(&elt.data[elt.start..]) as usize;
85 if eq_fn(&elt.data[elt.start + 4 .. elt.end]) {
86 ret = Some(reader::doc_at(d.data, pos).unwrap().doc);
95 pub fn maybe_find_item<'a>(item_id: ast::NodeId,
96 items: rbml::Doc<'a>) -> Option<rbml::Doc<'a>> {
97 fn eq_item(bytes: &[u8], item_id: ast::NodeId) -> bool {
98 u32_from_be_bytes(bytes) == item_id
101 |a| eq_item(a, item_id),
102 hash::hash::<i64, SipHasher>(&(item_id as i64)))
105 fn find_item<'a>(item_id: ast::NodeId, items: rbml::Doc<'a>) -> rbml::Doc<'a> {
106 match maybe_find_item(item_id, items) {
107 None => panic!("lookup_item: id not found: {}", item_id),
112 // Looks up an item in the given metadata and returns an rbml doc pointing
114 fn lookup_item<'a>(item_id: ast::NodeId, data: &'a [u8]) -> rbml::Doc<'a> {
115 let items = reader::get_doc(rbml::Doc::new(data), tag_items);
116 find_item(item_id, items)
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 {
157 'V' => StructVariant,
163 'N' => InheritedField,
164 c => panic!("unexpected family char: {}", c)
168 fn item_visibility(item: rbml::Doc) -> ast::Visibility {
169 match reader::maybe_get_doc(item, tag_items_data_item_visibility) {
171 Some(visibility_doc) => {
172 match reader::doc_as_u8(visibility_doc) as char {
174 'i' => ast::Inherited,
175 _ => panic!("unknown visibility character")
181 fn item_sort(item: rbml::Doc) -> Option<char> {
183 reader::tagged_docs(item, tag_item_trait_item_sort, |doc| {
184 ret = Some(doc.as_str_slice().as_bytes()[0] as char);
190 fn item_symbol(item: rbml::Doc) -> String {
191 reader::get_doc(item, tag_items_data_item_symbol).as_str().to_string()
194 fn translated_def_id(cdata: Cmd, d: rbml::Doc) -> ast::DefId {
195 let id = reader::doc_as_u64(d);
196 let def_id = ast::DefId { krate: (id >> 32) as u32, node: id as u32 };
197 translate_def_id(cdata, def_id)
200 fn item_parent_item(cdata: Cmd, d: rbml::Doc) -> Option<ast::DefId> {
202 reader::tagged_docs(d, tag_items_data_parent_item, |did| {
203 ret = Some(translated_def_id(cdata, did));
209 fn item_require_parent_item(cdata: Cmd, d: rbml::Doc) -> ast::DefId {
210 translated_def_id(cdata, reader::get_doc(d, tag_items_data_parent_item))
213 fn item_def_id(d: rbml::Doc, cdata: Cmd) -> ast::DefId {
214 translated_def_id(cdata, reader::get_doc(d, tag_def_id))
217 fn get_provided_source(d: rbml::Doc, cdata: Cmd) -> Option<ast::DefId> {
218 reader::maybe_get_doc(d, tag_item_method_provided_source).map(|doc| {
219 translated_def_id(cdata, doc)
223 fn each_reexport<F>(d: rbml::Doc, f: F) -> bool where
224 F: FnMut(rbml::Doc) -> bool,
226 reader::tagged_docs(d, tag_items_data_item_reexport, f)
229 fn variant_disr_val(d: rbml::Doc) -> Option<ty::Disr> {
230 reader::maybe_get_doc(d, tag_disr_val).and_then(|val_doc| {
231 reader::with_doc_data(val_doc, |data| {
232 str::from_utf8(data).ok().and_then(|s| s.parse().ok())
237 fn doc_type<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
238 let tp = reader::get_doc(doc, tag_items_data_item_type);
239 parse_ty_data(tp.data, cdata.cnum, tp.start, tcx,
240 |_, did| translate_def_id(cdata, did))
243 fn doc_method_fty<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>,
244 cdata: Cmd) -> ty::BareFnTy<'tcx> {
245 let tp = reader::get_doc(doc, tag_item_method_fty);
246 parse_bare_fn_ty_data(tp.data, cdata.cnum, tp.start, tcx,
247 |_, did| translate_def_id(cdata, did))
250 pub fn item_type<'tcx>(_item_id: ast::DefId, item: rbml::Doc,
251 tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
252 doc_type(item, tcx, cdata)
255 fn doc_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
256 -> ty::TraitRef<'tcx> {
257 parse_trait_ref_data(doc.data, cdata.cnum, doc.start, tcx,
258 |_, did| translate_def_id(cdata, did))
261 fn item_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
262 -> ty::TraitRef<'tcx> {
263 let tp = reader::get_doc(doc, tag_item_trait_ref);
264 doc_trait_ref(tp, tcx, cdata)
267 fn enum_variant_ids(item: rbml::Doc, cdata: Cmd) -> Vec<ast::DefId> {
268 let mut ids = vec![];
269 reader::tagged_docs(item, tag_items_data_item_variant, |p| {
270 ids.push(translated_def_id(cdata, p));
276 fn item_path(item_doc: rbml::Doc) -> Vec<ast_map::PathElem> {
277 let path_doc = reader::get_doc(item_doc, tag_path);
278 reader::docs(path_doc).filter_map(|(tag, elt_doc)| {
279 if tag == tag_path_elem_mod {
280 let s = elt_doc.as_str_slice();
281 Some(ast_map::PathMod(token::intern(s)))
282 } else if tag == tag_path_elem_name {
283 let s = elt_doc.as_str_slice();
284 Some(ast_map::PathName(token::intern(s)))
286 // ignore tag_path_len element
292 fn item_name(intr: &IdentInterner, item: rbml::Doc) -> ast::Name {
293 let name = reader::get_doc(item, tag_paths_data_name);
294 let string = name.as_str_slice();
295 match intr.find(string) {
296 None => token::intern(string),
301 fn item_to_def_like(cdata: Cmd, item: rbml::Doc, did: ast::DefId) -> DefLike {
302 let fam = item_family(item);
305 // Check whether we have an associated const item.
306 if item_sort(item) == Some('C') {
307 // Check whether the associated const is from a trait or impl.
308 // See the comment for methods below.
309 let provenance = if reader::maybe_get_doc(
310 item, tag_item_trait_parent_sort).is_some() {
311 def::FromTrait(item_require_parent_item(cdata, item))
313 def::FromImpl(item_require_parent_item(cdata, item))
315 DlDef(def::DefAssociatedConst(did, provenance))
317 // Regular const item.
318 DlDef(def::DefConst(did))
321 ImmStatic => DlDef(def::DefStatic(did, false)),
322 MutStatic => DlDef(def::DefStatic(did, true)),
323 Struct => DlDef(def::DefStruct(did)),
324 Fn => DlDef(def::DefFn(did, false)),
325 CtorFn => DlDef(def::DefFn(did, true)),
326 Method | StaticMethod => {
327 // def_static_method carries an optional field of its enclosing
328 // trait or enclosing impl (if this is an inherent static method).
329 // So we need to detect whether this is in a trait or not, which
330 // we do through the mildly hacky way of checking whether there is
331 // a trait_parent_sort.
332 let provenance = if reader::maybe_get_doc(
333 item, tag_item_trait_parent_sort).is_some() {
334 def::FromTrait(item_require_parent_item(cdata, item))
336 def::FromImpl(item_require_parent_item(cdata, item))
338 DlDef(def::DefMethod(did, provenance))
341 if item_sort(item) == Some('t') {
342 let trait_did = item_require_parent_item(cdata, item);
343 DlDef(def::DefAssociatedTy(trait_did, did))
345 DlDef(def::DefTy(did, false))
348 Mod => DlDef(def::DefMod(did)),
349 ForeignMod => DlDef(def::DefForeignMod(did)),
351 let enum_did = item_require_parent_item(cdata, item);
352 DlDef(def::DefVariant(enum_did, did, true))
355 let enum_did = item_require_parent_item(cdata, item);
356 DlDef(def::DefVariant(enum_did, did, false))
358 Trait => DlDef(def::DefTrait(did)),
359 Enum => DlDef(def::DefTy(did, true)),
360 Impl | DefaultImpl => DlImpl(did),
361 PublicField | InheritedField => DlField,
365 fn parse_unsafety(item_doc: rbml::Doc) -> ast::Unsafety {
366 let unsafety_doc = reader::get_doc(item_doc, tag_unsafety);
367 if reader::doc_as_u8(unsafety_doc) != 0 {
368 ast::Unsafety::Unsafe
370 ast::Unsafety::Normal
374 fn parse_paren_sugar(item_doc: rbml::Doc) -> bool {
375 let paren_sugar_doc = reader::get_doc(item_doc, tag_paren_sugar);
376 reader::doc_as_u8(paren_sugar_doc) != 0
379 fn parse_polarity(item_doc: rbml::Doc) -> ast::ImplPolarity {
380 let polarity_doc = reader::get_doc(item_doc, tag_polarity);
381 if reader::doc_as_u8(polarity_doc) != 0 {
382 ast::ImplPolarity::Negative
384 ast::ImplPolarity::Positive
388 fn parse_associated_type_names(item_doc: rbml::Doc) -> Vec<ast::Name> {
389 let names_doc = reader::get_doc(item_doc, tag_associated_type_names);
390 let mut names = Vec::new();
391 reader::tagged_docs(names_doc, tag_associated_type_name, |name_doc| {
392 let name = token::intern(name_doc.as_str_slice());
399 pub fn get_trait_def<'tcx>(cdata: Cmd,
400 item_id: ast::NodeId,
401 tcx: &ty::ctxt<'tcx>) -> ty::TraitDef<'tcx>
403 let item_doc = lookup_item(item_id, cdata.data());
404 let generics = doc_generics(item_doc, tcx, cdata, tag_item_generics);
405 let unsafety = parse_unsafety(item_doc);
406 let associated_type_names = parse_associated_type_names(item_doc);
407 let paren_sugar = parse_paren_sugar(item_doc);
410 paren_sugar: paren_sugar,
413 trait_ref: item_trait_ref(item_doc, tcx, cdata),
414 associated_type_names: associated_type_names,
415 nonblanket_impls: RefCell::new(FnvHashMap()),
416 blanket_impls: RefCell::new(vec![]),
417 flags: Cell::new(ty::TraitFlags::NO_TRAIT_FLAGS)
421 pub fn get_predicates<'tcx>(cdata: Cmd,
422 item_id: ast::NodeId,
423 tcx: &ty::ctxt<'tcx>)
424 -> ty::GenericPredicates<'tcx>
426 let item_doc = lookup_item(item_id, cdata.data());
427 doc_predicates(item_doc, tcx, cdata, tag_item_generics)
430 pub fn get_super_predicates<'tcx>(cdata: Cmd,
431 item_id: ast::NodeId,
432 tcx: &ty::ctxt<'tcx>)
433 -> ty::GenericPredicates<'tcx>
435 let item_doc = lookup_item(item_id, cdata.data());
436 doc_predicates(item_doc, tcx, cdata, tag_item_super_predicates)
439 pub fn get_type<'tcx>(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt<'tcx>)
440 -> ty::TypeScheme<'tcx>
442 let item_doc = lookup_item(id, cdata.data());
443 let t = item_type(ast::DefId { krate: cdata.cnum, node: id }, item_doc, tcx,
445 let generics = doc_generics(item_doc, tcx, cdata, tag_item_generics);
452 pub fn get_stability(cdata: Cmd, id: ast::NodeId) -> Option<attr::Stability> {
453 let item = lookup_item(id, cdata.data());
454 reader::maybe_get_doc(item, tag_items_data_item_stability).map(|doc| {
455 let mut decoder = reader::Decoder::new(doc);
456 Decodable::decode(&mut decoder).unwrap()
460 pub fn get_repr_attrs(cdata: Cmd, id: ast::NodeId) -> Vec<attr::ReprAttr> {
461 let item = lookup_item(id, cdata.data());
462 match reader::maybe_get_doc(item, tag_items_data_item_repr).map(|doc| {
463 let mut decoder = reader::Decoder::new(doc);
464 Decodable::decode(&mut decoder).unwrap()
466 Some(attrs) => attrs,
471 pub fn get_impl_polarity<'tcx>(cdata: Cmd,
473 -> Option<ast::ImplPolarity>
475 let item_doc = lookup_item(id, cdata.data());
476 let fam = item_family(item_doc);
479 Some(parse_polarity(item_doc))
485 pub fn get_custom_coerce_unsized_kind<'tcx>(cdata: Cmd,
487 -> Option<ty::CustomCoerceUnsized> {
488 let item_doc = lookup_item(id, cdata.data());
489 reader::maybe_get_doc(item_doc, tag_impl_coerce_unsized_kind).map(|kind_doc| {
490 let mut decoder = reader::Decoder::new(kind_doc);
491 Decodable::decode(&mut decoder).unwrap()
495 pub fn get_impl_trait<'tcx>(cdata: Cmd,
497 tcx: &ty::ctxt<'tcx>)
498 -> Option<ty::TraitRef<'tcx>>
500 let item_doc = lookup_item(id, cdata.data());
501 let fam = item_family(item_doc);
503 Family::Impl | Family::DefaultImpl => {
504 reader::maybe_get_doc(item_doc, tag_item_trait_ref).map(|tp| {
505 doc_trait_ref(tp, tcx, cdata)
512 pub fn get_impl_vtables<'tcx>(cdata: Cmd,
514 tcx: &ty::ctxt<'tcx>)
515 -> ty::vtable_res<'tcx>
517 let item_doc = lookup_item(id, cdata.data());
518 let vtables_doc = reader::get_doc(item_doc, tag_item_impl_vtables);
519 let mut decoder = reader::Decoder::new(vtables_doc);
520 decoder.read_vtable_res(tcx, cdata)
524 pub fn get_symbol(data: &[u8], id: ast::NodeId) -> String {
525 return item_symbol(lookup_item(id, data));
528 // Something that a name can resolve to.
529 #[derive(Copy, Clone, Debug)]
536 /// Iterates over the language items in the given crate.
537 pub fn each_lang_item<F>(cdata: Cmd, mut f: F) -> bool where
538 F: FnMut(ast::NodeId, usize) -> bool,
540 let root = rbml::Doc::new(cdata.data());
541 let lang_items = reader::get_doc(root, tag_lang_items);
542 reader::tagged_docs(lang_items, tag_lang_items_item, |item_doc| {
543 let id_doc = reader::get_doc(item_doc, tag_lang_items_item_id);
544 let id = reader::doc_as_u32(id_doc) as usize;
545 let node_id_doc = reader::get_doc(item_doc,
546 tag_lang_items_item_node_id);
547 let node_id = reader::doc_as_u32(node_id_doc) as ast::NodeId;
553 fn each_child_of_item_or_crate<F, G>(intr: Rc<IdentInterner>,
556 mut get_crate_data: G,
557 mut callback: F) where
558 F: FnMut(DefLike, ast::Name, ast::Visibility),
559 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
561 // Iterate over all children.
562 let _ = reader::tagged_docs(item_doc, tag_mod_child, |child_info_doc| {
563 let child_def_id = translated_def_id(cdata, child_info_doc);
565 // This item may be in yet another crate if it was the child of a
567 let crate_data = if child_def_id.krate == cdata.cnum {
570 Some(get_crate_data(child_def_id.krate))
572 let crate_data = match crate_data {
573 Some(ref cdata) => &**cdata,
577 let other_crates_items = reader::get_doc(rbml::Doc::new(crate_data.data()), tag_items);
580 match maybe_find_item(child_def_id.node, other_crates_items) {
582 Some(child_item_doc) => {
583 // Hand off the item to the callback.
584 let child_name = item_name(&*intr, child_item_doc);
585 let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
586 let visibility = item_visibility(child_item_doc);
587 callback(def_like, child_name, visibility);
595 // As a special case, iterate over all static methods of
596 // associated implementations too. This is a bit of a botch.
598 let _ = reader::tagged_docs(item_doc,
599 tag_items_data_item_inherent_impl,
600 |inherent_impl_def_id_doc| {
601 let inherent_impl_def_id = item_def_id(inherent_impl_def_id_doc,
603 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_items);
604 if let Some(inherent_impl_doc) = maybe_find_item(inherent_impl_def_id.node, items) {
605 let _ = reader::tagged_docs(inherent_impl_doc,
607 |impl_item_def_id_doc| {
608 let impl_item_def_id = item_def_id(impl_item_def_id_doc,
610 if let Some(impl_method_doc) = maybe_find_item(impl_item_def_id.node, items) {
611 if let StaticMethod = item_family(impl_method_doc) {
612 // Hand off the static method to the callback.
613 let static_method_name = item_name(&*intr, impl_method_doc);
614 let static_method_def_like = item_to_def_like(cdata, impl_method_doc,
616 callback(static_method_def_like,
618 item_visibility(impl_method_doc));
627 // Iterate over all reexports.
628 let _ = each_reexport(item_doc, |reexport_doc| {
629 let def_id_doc = reader::get_doc(reexport_doc,
630 tag_items_data_item_reexport_def_id);
631 let child_def_id = translated_def_id(cdata, def_id_doc);
633 let name_doc = reader::get_doc(reexport_doc,
634 tag_items_data_item_reexport_name);
635 let name = name_doc.as_str_slice();
637 // This reexport may be in yet another crate.
638 let crate_data = if child_def_id.krate == cdata.cnum {
641 Some(get_crate_data(child_def_id.krate))
643 let crate_data = match crate_data {
644 Some(ref cdata) => &**cdata,
648 let other_crates_items = reader::get_doc(rbml::Doc::new(crate_data.data()), tag_items);
651 if let Some(child_item_doc) = maybe_find_item(child_def_id.node, other_crates_items) {
652 // Hand off the item to the callback.
653 let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
654 // These items have a public visibility because they're part of
655 // a public re-export.
656 callback(def_like, token::intern(name), ast::Public);
663 /// Iterates over each child of the given item.
664 pub fn each_child_of_item<F, G>(intr: Rc<IdentInterner>,
669 F: FnMut(DefLike, ast::Name, ast::Visibility),
670 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
673 let root_doc = rbml::Doc::new(cdata.data());
674 let items = reader::get_doc(root_doc, tag_items);
675 let item_doc = match maybe_find_item(id, items) {
677 Some(item_doc) => item_doc,
680 each_child_of_item_or_crate(intr,
687 /// Iterates over all the top-level crate items.
688 pub fn each_top_level_item_of_crate<F, G>(intr: Rc<IdentInterner>,
692 F: FnMut(DefLike, ast::Name, ast::Visibility),
693 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
695 let root_doc = rbml::Doc::new(cdata.data());
696 let misc_info_doc = reader::get_doc(root_doc, tag_misc_info);
697 let crate_items_doc = reader::get_doc(misc_info_doc,
698 tag_misc_info_crate_items);
700 each_child_of_item_or_crate(intr,
707 pub fn get_item_path(cdata: Cmd, id: ast::NodeId) -> Vec<ast_map::PathElem> {
708 item_path(lookup_item(id, cdata.data()))
711 pub type DecodeInlinedItem<'a> =
712 Box<for<'tcx> FnMut(Cmd,
714 Vec<ast_map::PathElem>,
716 -> Result<&'tcx ast::InlinedItem, Vec<ast_map::PathElem>> + 'a>;
718 pub fn maybe_get_item_ast<'tcx>(cdata: Cmd, tcx: &ty::ctxt<'tcx>, id: ast::NodeId,
719 mut decode_inlined_item: DecodeInlinedItem)
720 -> csearch::FoundAst<'tcx> {
721 debug!("Looking up item: {}", id);
722 let item_doc = lookup_item(id, cdata.data());
723 let path = item_path(item_doc).init().to_vec();
724 match decode_inlined_item(cdata, tcx, path, item_doc) {
725 Ok(ii) => csearch::FoundAst::Found(ii),
727 match item_parent_item(cdata, item_doc) {
729 let parent_item = lookup_item(did.node, cdata.data());
730 match decode_inlined_item(cdata, tcx, path, parent_item) {
731 Ok(ii) => csearch::FoundAst::FoundParent(did, ii),
732 Err(_) => csearch::FoundAst::NotFound
735 None => csearch::FoundAst::NotFound
741 pub fn get_enum_variant_defs(intr: &IdentInterner,
744 -> Vec<(def::Def, ast::Name, ast::Visibility)> {
745 let data = cdata.data();
746 let items = reader::get_doc(rbml::Doc::new(data), tag_items);
747 let item = find_item(id, items);
748 enum_variant_ids(item, cdata).iter().map(|did| {
749 let item = find_item(did.node, items);
750 let name = item_name(intr, item);
751 let visibility = item_visibility(item);
752 match item_to_def_like(cdata, item, *did) {
753 DlDef(def @ def::DefVariant(..)) => (def, name, visibility),
759 pub fn get_enum_variants<'tcx>(intr: Rc<IdentInterner>, cdata: Cmd, id: ast::NodeId,
760 tcx: &ty::ctxt<'tcx>) -> Vec<Rc<ty::VariantInfo<'tcx>>> {
761 let data = cdata.data();
762 let items = reader::get_doc(rbml::Doc::new(data), tag_items);
763 let item = find_item(id, items);
764 let mut disr_val = 0;
765 enum_variant_ids(item, cdata).iter().map(|did| {
766 let item = find_item(did.node, items);
767 let ctor_ty = item_type(ast::DefId { krate: cdata.cnum, node: id},
769 let name = item_name(&*intr, item);
770 let (ctor_ty, arg_tys, arg_names) = match ctor_ty.sty {
771 ty::ty_bare_fn(_, ref f) =>
772 (Some(ctor_ty), f.sig.0.inputs.clone(), None),
773 _ => { // Nullary or struct enum variant.
774 let mut arg_names = Vec::new();
775 let arg_tys = get_struct_fields(intr.clone(), cdata, did.node)
778 arg_names.push(field_ty.name);
779 get_type(cdata, field_ty.id.node, tcx).ty
782 let arg_names = if arg_names.is_empty() { None } else { Some(arg_names) };
784 (None, arg_tys, arg_names)
787 match variant_disr_val(item) {
788 Some(val) => { disr_val = val; }
791 let old_disr_val = disr_val;
792 disr_val = disr_val.wrapping_add(1);
793 Rc::new(ty::VariantInfo {
795 arg_names: arg_names,
798 // I'm not even sure if we encode visibility
799 // for variants -- TEST -- tjc
801 disr_val: old_disr_val,
807 fn get_explicit_self(item: rbml::Doc) -> ty::ExplicitSelfCategory {
808 fn get_mutability(ch: u8) -> ast::Mutability {
810 'i' => ast::MutImmutable,
811 'm' => ast::MutMutable,
812 _ => panic!("unknown mutability character: `{}`", ch as char),
816 let explicit_self_doc = reader::get_doc(item, tag_item_trait_method_explicit_self);
817 let string = explicit_self_doc.as_str_slice();
819 let explicit_self_kind = string.as_bytes()[0];
820 match explicit_self_kind as char {
821 's' => ty::StaticExplicitSelfCategory,
822 'v' => ty::ByValueExplicitSelfCategory,
823 '~' => ty::ByBoxExplicitSelfCategory,
824 // FIXME(#4846) expl. region
826 ty::ByReferenceExplicitSelfCategory(
828 get_mutability(string.as_bytes()[1]))
830 _ => panic!("unknown self type code: `{}`", explicit_self_kind as char)
834 /// Returns the def IDs of all the items in the given implementation.
835 pub fn get_impl_items(cdata: Cmd, impl_id: ast::NodeId)
836 -> Vec<ty::ImplOrTraitItemId> {
837 let mut impl_items = Vec::new();
838 reader::tagged_docs(lookup_item(impl_id, cdata.data()),
839 tag_item_impl_item, |doc| {
840 let def_id = item_def_id(doc, cdata);
841 match item_sort(doc) {
842 Some('C') => impl_items.push(ty::ConstTraitItemId(def_id)),
843 Some('r') | Some('p') => {
844 impl_items.push(ty::MethodTraitItemId(def_id))
846 Some('t') => impl_items.push(ty::TypeTraitItemId(def_id)),
847 _ => panic!("unknown impl item sort"),
855 pub fn get_trait_name(intr: Rc<IdentInterner>,
859 let doc = lookup_item(id, cdata.data());
860 item_name(&*intr, doc)
863 pub fn is_static_method(cdata: Cmd, id: ast::NodeId) -> bool {
864 let doc = lookup_item(id, cdata.data());
865 match item_sort(doc) {
866 Some('r') | Some('p') => {
867 get_explicit_self(doc) == ty::StaticExplicitSelfCategory
873 pub fn get_impl_or_trait_item<'tcx>(intr: Rc<IdentInterner>,
876 tcx: &ty::ctxt<'tcx>)
877 -> ty::ImplOrTraitItem<'tcx> {
878 let method_doc = lookup_item(id, cdata.data());
880 let def_id = item_def_id(method_doc, cdata);
882 let container_id = item_require_parent_item(cdata, method_doc);
883 let container_doc = lookup_item(container_id.node, cdata.data());
884 let container = match item_family(container_doc) {
885 Trait => TraitContainer(container_id),
886 _ => ImplContainer(container_id),
889 let name = item_name(&*intr, method_doc);
890 let vis = item_visibility(method_doc);
892 match item_sort(method_doc) {
894 let ty = doc_type(method_doc, tcx, cdata);
895 let default = get_provided_source(method_doc, cdata);
896 ty::ConstTraitItem(Rc::new(ty::AssociatedConst {
901 container: container,
905 Some('r') | Some('p') => {
906 let generics = doc_generics(method_doc, tcx, cdata, tag_method_ty_generics);
907 let predicates = doc_predicates(method_doc, tcx, cdata, tag_method_ty_generics);
908 let fty = doc_method_fty(method_doc, tcx, cdata);
909 let explicit_self = get_explicit_self(method_doc);
910 let provided_source = get_provided_source(method_doc, cdata);
912 ty::MethodTraitItem(Rc::new(ty::Method::new(name,
923 ty::TypeTraitItem(Rc::new(ty::AssociatedType {
927 container: container,
930 _ => panic!("unknown impl/trait item sort"),
934 pub fn get_trait_item_def_ids(cdata: Cmd, id: ast::NodeId)
935 -> Vec<ty::ImplOrTraitItemId> {
936 let data = cdata.data();
937 let item = lookup_item(id, data);
938 let mut result = Vec::new();
939 reader::tagged_docs(item, tag_item_trait_item, |mth| {
940 let def_id = item_def_id(mth, cdata);
941 match item_sort(mth) {
942 Some('C') => result.push(ty::ConstTraitItemId(def_id)),
943 Some('r') | Some('p') => {
944 result.push(ty::MethodTraitItemId(def_id));
946 Some('t') => result.push(ty::TypeTraitItemId(def_id)),
947 _ => panic!("unknown trait item sort"),
954 pub fn get_item_variances(cdata: Cmd, id: ast::NodeId) -> ty::ItemVariances {
955 let data = cdata.data();
956 let item_doc = lookup_item(id, data);
957 let variance_doc = reader::get_doc(item_doc, tag_item_variances);
958 let mut decoder = reader::Decoder::new(variance_doc);
959 Decodable::decode(&mut decoder).unwrap()
962 pub fn get_provided_trait_methods<'tcx>(intr: Rc<IdentInterner>,
965 tcx: &ty::ctxt<'tcx>)
966 -> Vec<Rc<ty::Method<'tcx>>> {
967 let data = cdata.data();
968 let item = lookup_item(id, data);
969 let mut result = Vec::new();
971 reader::tagged_docs(item, tag_item_trait_item, |mth_id| {
972 let did = item_def_id(mth_id, cdata);
973 let mth = lookup_item(did.node, data);
975 if item_sort(mth) == Some('p') {
976 let trait_item = get_impl_or_trait_item(intr.clone(),
980 if let ty::MethodTraitItem(ref method) = trait_item {
981 result.push((*method).clone())
990 pub fn get_associated_consts<'tcx>(intr: Rc<IdentInterner>,
993 tcx: &ty::ctxt<'tcx>)
994 -> Vec<Rc<ty::AssociatedConst<'tcx>>> {
995 let data = cdata.data();
996 let item = lookup_item(id, data);
997 let mut result = Vec::new();
999 for &tag in &[tag_item_trait_item, tag_item_impl_item] {
1000 reader::tagged_docs(item, tag, |ac_id| {
1001 let did = item_def_id(ac_id, cdata);
1002 let ac_doc = lookup_item(did.node, data);
1004 if item_sort(ac_doc) == Some('C') {
1005 let trait_item = get_impl_or_trait_item(intr.clone(),
1009 if let ty::ConstTraitItem(ref ac) = trait_item {
1010 result.push((*ac).clone())
1020 pub fn get_type_name_if_impl(cdata: Cmd,
1021 node_id: ast::NodeId) -> Option<ast::Name> {
1022 let item = lookup_item(node_id, cdata.data());
1023 if item_family(item) != Impl {
1028 reader::tagged_docs(item, tag_item_impl_type_basename, |doc| {
1029 ret = Some(token::intern(doc.as_str_slice()));
1036 pub fn get_methods_if_impl(intr: Rc<IdentInterner>,
1038 node_id: ast::NodeId)
1039 -> Option<Vec<MethodInfo> > {
1040 let item = lookup_item(node_id, cdata.data());
1041 if item_family(item) != Impl {
1045 // If this impl implements a trait, don't consider it.
1046 let ret = reader::tagged_docs(item, tag_item_trait_ref, |_doc| {
1050 if !ret { return None }
1052 let mut impl_method_ids = Vec::new();
1053 reader::tagged_docs(item, tag_item_impl_item, |impl_method_doc| {
1054 impl_method_ids.push(item_def_id(impl_method_doc, cdata));
1058 let mut impl_methods = Vec::new();
1059 for impl_method_id in &impl_method_ids {
1060 let impl_method_doc = lookup_item(impl_method_id.node, cdata.data());
1061 let family = item_family(impl_method_doc);
1063 StaticMethod | Method => {
1064 impl_methods.push(MethodInfo {
1065 name: item_name(&*intr, impl_method_doc),
1066 def_id: item_def_id(impl_method_doc, cdata),
1067 vis: item_visibility(impl_method_doc),
1074 return Some(impl_methods);
1077 /// If node_id is the constructor of a tuple struct, retrieve the NodeId of
1078 /// the actual type definition, otherwise, return None
1079 pub fn get_tuple_struct_definition_if_ctor(cdata: Cmd,
1080 node_id: ast::NodeId)
1081 -> Option<ast::DefId>
1083 let item = lookup_item(node_id, cdata.data());
1085 reader::tagged_docs(item, tag_items_data_item_is_tuple_struct_ctor, |_| {
1086 ret = Some(item_require_parent_item(cdata, item));
1092 pub fn get_item_attrs(cdata: Cmd,
1093 orig_node_id: ast::NodeId)
1094 -> Vec<ast::Attribute> {
1095 // The attributes for a tuple struct are attached to the definition, not the ctor;
1096 // we assume that someone passing in a tuple struct ctor is actually wanting to
1097 // look at the definition
1098 let node_id = get_tuple_struct_definition_if_ctor(cdata, orig_node_id);
1099 let node_id = node_id.map(|x| x.node).unwrap_or(orig_node_id);
1100 let item = lookup_item(node_id, cdata.data());
1101 get_attributes(item)
1104 pub fn get_struct_field_attrs(cdata: Cmd) -> HashMap<ast::NodeId, Vec<ast::Attribute>> {
1105 let data = rbml::Doc::new(cdata.data());
1106 let fields = reader::get_doc(data, tag_struct_fields);
1107 let mut map = HashMap::new();
1108 reader::tagged_docs(fields, tag_struct_field, |field| {
1109 let id = reader::doc_as_u32(reader::get_doc(field, tag_struct_field_id));
1110 let attrs = get_attributes(field);
1111 map.insert(id, attrs);
1117 fn struct_field_family_to_visibility(family: Family) -> ast::Visibility {
1119 PublicField => ast::Public,
1120 InheritedField => ast::Inherited,
1125 pub fn get_struct_fields(intr: Rc<IdentInterner>, cdata: Cmd, id: ast::NodeId)
1126 -> Vec<ty::field_ty> {
1127 let data = cdata.data();
1128 let item = lookup_item(id, data);
1129 let mut result = Vec::new();
1130 reader::tagged_docs(item, tag_item_field, |an_item| {
1131 let f = item_family(an_item);
1132 if f == PublicField || f == InheritedField {
1133 let name = item_name(&*intr, an_item);
1134 let did = item_def_id(an_item, cdata);
1135 let tagdoc = reader::get_doc(an_item, tag_item_field_origin);
1136 let origin_id = translated_def_id(cdata, tagdoc);
1137 result.push(ty::field_ty {
1140 vis: struct_field_family_to_visibility(f),
1146 reader::tagged_docs(item, tag_item_unnamed_field, |an_item| {
1147 let did = item_def_id(an_item, cdata);
1148 let tagdoc = reader::get_doc(an_item, tag_item_field_origin);
1149 let f = item_family(an_item);
1150 let origin_id = translated_def_id(cdata, tagdoc);
1151 result.push(ty::field_ty {
1152 name: special_idents::unnamed_field.name,
1154 vis: struct_field_family_to_visibility(f),
1162 fn get_meta_items(md: rbml::Doc) -> Vec<P<ast::MetaItem>> {
1163 let mut items: Vec<P<ast::MetaItem>> = Vec::new();
1164 reader::tagged_docs(md, tag_meta_item_word, |meta_item_doc| {
1165 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1166 let n = token::intern_and_get_ident(nd.as_str_slice());
1167 items.push(attr::mk_word_item(n));
1170 reader::tagged_docs(md, tag_meta_item_name_value, |meta_item_doc| {
1171 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1172 let vd = reader::get_doc(meta_item_doc, tag_meta_item_value);
1173 let n = token::intern_and_get_ident(nd.as_str_slice());
1174 let v = token::intern_and_get_ident(vd.as_str_slice());
1175 // FIXME (#623): Should be able to decode MetaNameValue variants,
1176 // but currently the encoder just drops them
1177 items.push(attr::mk_name_value_item_str(n, v));
1180 reader::tagged_docs(md, tag_meta_item_list, |meta_item_doc| {
1181 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1182 let n = token::intern_and_get_ident(nd.as_str_slice());
1183 let subitems = get_meta_items(meta_item_doc);
1184 items.push(attr::mk_list_item(n, subitems.into_iter().collect()));
1190 fn get_attributes(md: rbml::Doc) -> Vec<ast::Attribute> {
1191 let mut attrs: Vec<ast::Attribute> = Vec::new();
1192 match reader::maybe_get_doc(md, tag_attributes) {
1194 reader::tagged_docs(attrs_d, tag_attribute, |attr_doc| {
1195 let is_sugared_doc = reader::doc_as_u8(
1196 reader::get_doc(attr_doc, tag_attribute_is_sugared_doc)
1198 let meta_items = get_meta_items(attr_doc);
1199 // Currently it's only possible to have a single meta item on
1201 assert_eq!(meta_items.len(), 1);
1202 let meta_item = meta_items.into_iter().nth(0).unwrap();
1205 node: ast::Attribute_ {
1206 id: attr::mk_attr_id(),
1207 style: ast::AttrOuter,
1209 is_sugared_doc: is_sugared_doc,
1211 span: codemap::DUMMY_SP
1221 fn list_crate_attributes(md: rbml::Doc, hash: &Svh,
1222 out: &mut io::Write) -> io::Result<()> {
1223 try!(write!(out, "=Crate Attributes ({})=\n", *hash));
1225 let r = get_attributes(md);
1227 try!(write!(out, "{}\n", pprust::attribute_to_string(attr)));
1233 pub fn get_crate_attributes(data: &[u8]) -> Vec<ast::Attribute> {
1234 get_attributes(rbml::Doc::new(data))
1238 pub struct CrateDep {
1239 pub cnum: ast::CrateNum,
1244 pub fn get_crate_deps(data: &[u8]) -> Vec<CrateDep> {
1245 let mut deps: Vec<CrateDep> = Vec::new();
1246 let cratedoc = rbml::Doc::new(data);
1247 let depsdoc = reader::get_doc(cratedoc, tag_crate_deps);
1248 let mut crate_num = 1;
1249 fn docstr(doc: rbml::Doc, tag_: usize) -> String {
1250 let d = reader::get_doc(doc, tag_);
1251 d.as_str_slice().to_string()
1253 reader::tagged_docs(depsdoc, tag_crate_dep, |depdoc| {
1254 let name = docstr(depdoc, tag_crate_dep_crate_name);
1255 let hash = Svh::new(&docstr(depdoc, tag_crate_dep_hash));
1256 deps.push(CrateDep {
1267 fn list_crate_deps(data: &[u8], out: &mut io::Write) -> io::Result<()> {
1268 try!(write!(out, "=External Dependencies=\n"));
1269 for dep in &get_crate_deps(data) {
1270 try!(write!(out, "{} {}-{}\n", dep.cnum, dep.name, dep.hash));
1272 try!(write!(out, "\n"));
1276 pub fn maybe_get_crate_hash(data: &[u8]) -> Option<Svh> {
1277 let cratedoc = rbml::Doc::new(data);
1278 reader::maybe_get_doc(cratedoc, tag_crate_hash).map(|doc| {
1279 Svh::new(doc.as_str_slice())
1283 pub fn get_crate_hash(data: &[u8]) -> Svh {
1284 let cratedoc = rbml::Doc::new(data);
1285 let hashdoc = reader::get_doc(cratedoc, tag_crate_hash);
1286 Svh::new(hashdoc.as_str_slice())
1289 pub fn maybe_get_crate_name(data: &[u8]) -> Option<String> {
1290 let cratedoc = rbml::Doc::new(data);
1291 reader::maybe_get_doc(cratedoc, tag_crate_crate_name).map(|doc| {
1292 doc.as_str_slice().to_string()
1296 pub fn get_crate_triple(data: &[u8]) -> Option<String> {
1297 let cratedoc = rbml::Doc::new(data);
1298 let triple_doc = reader::maybe_get_doc(cratedoc, tag_crate_triple);
1299 triple_doc.map(|s| s.as_str().to_string())
1302 pub fn get_crate_name(data: &[u8]) -> String {
1303 maybe_get_crate_name(data).expect("no crate name in crate")
1306 pub fn list_crate_metadata(bytes: &[u8], out: &mut io::Write) -> io::Result<()> {
1307 let hash = get_crate_hash(bytes);
1308 let md = rbml::Doc::new(bytes);
1309 try!(list_crate_attributes(md, &hash, out));
1310 list_crate_deps(bytes, out)
1313 // Translates a def_id from an external crate to a def_id for the current
1314 // compilation environment. We use this when trying to load types from
1315 // external crates - if those types further refer to types in other crates
1316 // then we must translate the crate number from that encoded in the external
1317 // crate to the correct local crate number.
1318 pub fn translate_def_id(cdata: Cmd, did: ast::DefId) -> ast::DefId {
1319 if did.krate == ast::LOCAL_CRATE {
1320 return ast::DefId { krate: cdata.cnum, node: did.node };
1323 match cdata.cnum_map.get(&did.krate) {
1330 None => panic!("didn't find a crate in the cnum_map")
1334 // Translate a DefId from the current compilation environment to a DefId
1335 // for an external crate.
1336 fn reverse_translate_def_id(cdata: Cmd, did: ast::DefId) -> Option<ast::DefId> {
1337 if did.krate == cdata.cnum {
1338 return Some(ast::DefId { krate: ast::LOCAL_CRATE, node: did.node });
1341 for (&local, &global) in &cdata.cnum_map {
1342 if global == did.krate {
1343 return Some(ast::DefId { krate: local, node: did.node });
1350 pub fn each_inherent_implementation_for_type<F>(cdata: Cmd,
1353 where F: FnMut(ast::DefId),
1355 let item_doc = lookup_item(id, cdata.data());
1356 reader::tagged_docs(item_doc,
1357 tag_items_data_item_inherent_impl,
1359 if reader::maybe_get_doc(impl_doc, tag_item_trait_ref).is_none() {
1360 callback(item_def_id(impl_doc, cdata));
1366 pub fn each_implementation_for_trait<F>(cdata: Cmd,
1368 mut callback: F) where
1369 F: FnMut(ast::DefId),
1371 if cdata.cnum == def_id.krate {
1372 let item_doc = lookup_item(def_id.node, cdata.data());
1373 let _ = reader::tagged_docs(item_doc,
1374 tag_items_data_item_extension_impl,
1376 callback(item_def_id(impl_doc, cdata));
1382 // Do a reverse lookup beforehand to avoid touching the crate_num
1383 // hash map in the loop below.
1384 if let Some(crate_local_did) = reverse_translate_def_id(cdata, def_id) {
1385 let def_id_u64 = def_to_u64(crate_local_did);
1387 let impls_doc = reader::get_doc(rbml::Doc::new(cdata.data()), tag_impls);
1388 let _ = reader::tagged_docs(impls_doc, tag_impls_impl, |impl_doc| {
1389 let impl_trait = reader::get_doc(impl_doc, tag_impls_impl_trait_def_id);
1390 if reader::doc_as_u64(impl_trait) == def_id_u64 {
1391 callback(item_def_id(impl_doc, cdata));
1398 pub fn get_trait_of_item(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt)
1399 -> Option<ast::DefId> {
1400 let item_doc = lookup_item(id, cdata.data());
1401 let parent_item_id = match item_parent_item(cdata, item_doc) {
1402 None => return None,
1403 Some(item_id) => item_id,
1405 let parent_item_doc = lookup_item(parent_item_id.node, cdata.data());
1406 match item_family(parent_item_doc) {
1407 Trait => Some(item_def_id(parent_item_doc, cdata)),
1408 Impl | DefaultImpl => {
1409 reader::maybe_get_doc(parent_item_doc, tag_item_trait_ref)
1410 .map(|_| item_trait_ref(parent_item_doc, tcx, cdata).def_id)
1417 pub fn get_native_libraries(cdata: Cmd)
1418 -> Vec<(cstore::NativeLibraryKind, String)> {
1419 let libraries = reader::get_doc(rbml::Doc::new(cdata.data()),
1420 tag_native_libraries);
1421 let mut result = Vec::new();
1422 reader::tagged_docs(libraries, tag_native_libraries_lib, |lib_doc| {
1423 let kind_doc = reader::get_doc(lib_doc, tag_native_libraries_kind);
1424 let name_doc = reader::get_doc(lib_doc, tag_native_libraries_name);
1425 let kind: cstore::NativeLibraryKind =
1426 cstore::NativeLibraryKind::from_u32(reader::doc_as_u32(kind_doc)).unwrap();
1427 let name = name_doc.as_str().to_string();
1428 result.push((kind, name));
1434 pub fn get_plugin_registrar_fn(data: &[u8]) -> Option<ast::NodeId> {
1435 reader::maybe_get_doc(rbml::Doc::new(data), tag_plugin_registrar_fn)
1436 .map(|doc| reader::doc_as_u32(doc))
1439 pub fn each_exported_macro<F>(data: &[u8], intr: &IdentInterner, mut f: F) where
1440 F: FnMut(ast::Name, Vec<ast::Attribute>, String) -> bool,
1442 let macros = reader::get_doc(rbml::Doc::new(data), tag_macro_defs);
1443 reader::tagged_docs(macros, tag_macro_def, |macro_doc| {
1444 let name = item_name(intr, macro_doc);
1445 let attrs = get_attributes(macro_doc);
1446 let body = reader::get_doc(macro_doc, tag_macro_def_body);
1447 f(name, attrs, body.as_str().to_string())
1451 pub fn get_dylib_dependency_formats(cdata: Cmd)
1452 -> Vec<(ast::CrateNum, cstore::LinkagePreference)>
1454 let formats = reader::get_doc(rbml::Doc::new(cdata.data()),
1455 tag_dylib_dependency_formats);
1456 let mut result = Vec::new();
1458 debug!("found dylib deps: {}", formats.as_str_slice());
1459 for spec in formats.as_str_slice().split(',') {
1460 if spec.is_empty() { continue }
1461 let cnum = spec.split(':').nth(0).unwrap();
1462 let link = spec.split(':').nth(1).unwrap();
1463 let cnum: ast::CrateNum = cnum.parse().unwrap();
1464 let cnum = match cdata.cnum_map.get(&cnum) {
1466 None => panic!("didn't find a crate in the cnum_map")
1468 result.push((cnum, if link == "d" {
1469 cstore::RequireDynamic
1471 cstore::RequireStatic
1477 pub fn get_missing_lang_items(cdata: Cmd)
1478 -> Vec<lang_items::LangItem>
1480 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_lang_items);
1481 let mut result = Vec::new();
1482 reader::tagged_docs(items, tag_lang_items_missing, |missing_docs| {
1483 let item: lang_items::LangItem =
1484 lang_items::LangItem::from_u32(reader::doc_as_u32(missing_docs)).unwrap();
1491 pub fn get_method_arg_names(cdata: Cmd, id: ast::NodeId) -> Vec<String> {
1492 let mut ret = Vec::new();
1493 let method_doc = lookup_item(id, cdata.data());
1494 match reader::maybe_get_doc(method_doc, tag_method_argument_names) {
1496 reader::tagged_docs(args_doc, tag_method_argument_name, |name_doc| {
1497 ret.push(name_doc.as_str_slice().to_string());
1506 pub fn get_reachable_extern_fns(cdata: Cmd) -> Vec<ast::DefId> {
1507 let mut ret = Vec::new();
1508 let items = reader::get_doc(rbml::Doc::new(cdata.data()),
1509 tag_reachable_extern_fns);
1510 reader::tagged_docs(items, tag_reachable_extern_fn_id, |doc| {
1511 ret.push(ast::DefId {
1513 node: reader::doc_as_u32(doc),
1520 pub fn is_typedef(cdata: Cmd, id: ast::NodeId) -> bool {
1521 let item_doc = lookup_item(id, cdata.data());
1522 match item_family(item_doc) {
1528 fn doc_generics<'tcx>(base_doc: rbml::Doc,
1529 tcx: &ty::ctxt<'tcx>,
1532 -> ty::Generics<'tcx>
1534 let doc = reader::get_doc(base_doc, tag);
1536 let mut types = subst::VecPerParamSpace::empty();
1537 reader::tagged_docs(doc, tag_type_param_def, |p| {
1538 let bd = parse_type_param_def_data(
1539 p.data, p.start, cdata.cnum, tcx,
1540 |_, did| translate_def_id(cdata, did));
1541 types.push(bd.space, bd);
1545 let mut regions = subst::VecPerParamSpace::empty();
1546 reader::tagged_docs(doc, tag_region_param_def, |rp_doc| {
1547 let ident_str_doc = reader::get_doc(rp_doc,
1548 tag_region_param_def_ident);
1549 let name = item_name(&*token::get_ident_interner(), ident_str_doc);
1550 let def_id_doc = reader::get_doc(rp_doc,
1551 tag_region_param_def_def_id);
1552 let def_id = translated_def_id(cdata, def_id_doc);
1554 let doc = reader::get_doc(rp_doc, tag_region_param_def_space);
1555 let space = subst::ParamSpace::from_uint(reader::doc_as_u64(doc) as usize);
1557 let doc = reader::get_doc(rp_doc, tag_region_param_def_index);
1558 let index = reader::doc_as_u64(doc) as u32;
1560 let mut bounds = Vec::new();
1561 reader::tagged_docs(rp_doc, tag_items_data_region, |p| {
1564 p.data, cdata.cnum, p.start, tcx,
1565 |_, did| translate_def_id(cdata, did)));
1569 regions.push(space, ty::RegionParameterDef { name: name,
1578 ty::Generics { types: types, regions: regions }
1581 fn doc_predicates<'tcx>(base_doc: rbml::Doc,
1582 tcx: &ty::ctxt<'tcx>,
1585 -> ty::GenericPredicates<'tcx>
1587 let doc = reader::get_doc(base_doc, tag);
1589 let mut predicates = subst::VecPerParamSpace::empty();
1590 reader::tagged_docs(doc, tag_predicate, |predicate_doc| {
1591 let space_doc = reader::get_doc(predicate_doc, tag_predicate_space);
1592 let space = subst::ParamSpace::from_uint(reader::doc_as_u8(space_doc) as usize);
1594 let data_doc = reader::get_doc(predicate_doc, tag_predicate_data);
1595 let data = parse_predicate_data(data_doc.data, data_doc.start, cdata.cnum, tcx,
1596 |_, did| translate_def_id(cdata, did));
1598 predicates.push(space, data);
1602 ty::GenericPredicates { predicates: predicates }
1605 pub fn is_associated_type(cdata: Cmd, id: ast::NodeId) -> bool {
1606 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_items);
1607 match maybe_find_item(id, items) {
1609 Some(item) => item_sort(item) == Some('t'),
1613 pub fn is_defaulted_trait(cdata: Cmd, trait_id: ast::NodeId) -> bool {
1614 let trait_doc = lookup_item(trait_id, cdata.data());
1615 assert!(item_family(trait_doc) == Family::Trait);
1616 let defaulted_doc = reader::get_doc(trait_doc, tag_defaulted_trait);
1617 reader::doc_as_u8(defaulted_doc) != 0
1620 pub fn is_default_impl(cdata: Cmd, impl_id: ast::NodeId) -> bool {
1621 let impl_doc = lookup_item(impl_id, cdata.data());
1622 item_family(impl_doc) == Family::DefaultImpl
1625 pub fn get_imported_filemaps(metadata: &[u8]) -> Vec<codemap::FileMap> {
1626 let crate_doc = rbml::Doc::new(metadata);
1627 let cm_doc = reader::get_doc(crate_doc, tag_codemap);
1629 let mut filemaps = vec![];
1631 reader::tagged_docs(cm_doc, tag_codemap_filemap, |filemap_doc| {
1632 let mut decoder = reader::Decoder::new(filemap_doc);
1633 let filemap: codemap::FileMap = Decodable::decode(&mut decoder).unwrap();
1634 filemaps.push(filemap);