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::tydecode::{parse_ty_data, parse_region_data, parse_def_id,
25 parse_type_param_def_data, parse_bounds_data,
26 parse_bare_fn_ty_data, parse_trait_ref_data,
27 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;
35 use std::collections::HashMap;
38 use std::io::extensions::u64_from_be_bytes;
40 use std::num::FromPrimitive;
46 use serialize::Decodable;
49 use syntax::parse::token::{IdentInterner, special_idents};
50 use syntax::parse::token;
51 use syntax::print::pprust;
56 pub type Cmd<'a> = &'a crate_metadata;
58 // A function that takes a def_id relative to the crate being searched and
59 // returns a def_id relative to the compilation environment, i.e. if we hit a
60 // def_id for an item defined in another crate, somebody needs to figure out
61 // what crate that's in and give us a def_id that makes sense for the current
64 fn lookup_hash<'a, F>(d: rbml::Doc<'a>, mut eq_fn: F, hash: u64) -> Option<rbml::Doc<'a>> where
65 F: FnMut(&[u8]) -> bool,
67 let index = reader::get_doc(d, tag_index);
68 let table = reader::get_doc(index, tag_index_table);
69 let hash_pos = table.start + (hash % 256 * 4) as uint;
70 let pos = u64_from_be_bytes(d.data, hash_pos, 4) as uint;
71 let tagged_doc = reader::doc_at(d.data, pos).unwrap();
73 let belt = tag_index_buckets_bucket_elt;
76 reader::tagged_docs(tagged_doc.doc, belt, |elt| {
77 let pos = u64_from_be_bytes(elt.data, elt.start, 4) as uint;
78 if eq_fn(elt.data[elt.start + 4 .. elt.end]) {
79 ret = Some(reader::doc_at(d.data, pos).unwrap().doc);
88 pub fn maybe_find_item<'a>(item_id: ast::NodeId,
89 items: rbml::Doc<'a>) -> Option<rbml::Doc<'a>> {
90 fn eq_item(bytes: &[u8], item_id: ast::NodeId) -> bool {
91 return u64_from_be_bytes(
92 bytes[0u..4u], 0u, 4u) as ast::NodeId
96 |a| eq_item(a, item_id),
97 hash::hash(&(item_id as i64)))
100 fn find_item<'a>(item_id: ast::NodeId, items: rbml::Doc<'a>) -> rbml::Doc<'a> {
101 match maybe_find_item(item_id, items) {
102 None => panic!("lookup_item: id not found: {}", item_id),
107 // Looks up an item in the given metadata and returns an rbml doc pointing
109 fn lookup_item<'a>(item_id: ast::NodeId, data: &'a [u8]) -> rbml::Doc<'a> {
110 let items = reader::get_doc(rbml::Doc::new(data), tag_items);
111 find_item(item_id, items)
137 fn item_family(item: rbml::Doc) -> Family {
138 let fam = reader::get_doc(item, tag_items_data_item_family);
139 match reader::doc_as_u8(fam) as char {
153 'V' => StructVariant,
158 'N' => InheritedField,
159 c => panic!("unexpected family char: {}", c)
163 fn item_visibility(item: rbml::Doc) -> ast::Visibility {
164 match reader::maybe_get_doc(item, tag_items_data_item_visibility) {
166 Some(visibility_doc) => {
167 match reader::doc_as_u8(visibility_doc) as char {
169 'i' => ast::Inherited,
170 _ => panic!("unknown visibility character")
176 fn item_sort(item: rbml::Doc) -> char {
178 reader::tagged_docs(item, tag_item_trait_item_sort, |doc| {
179 ret = Some(doc.as_str_slice().as_bytes()[0] as char);
184 None => panic!("No item_sort found")
188 fn item_symbol(item: rbml::Doc) -> String {
189 reader::get_doc(item, tag_items_data_item_symbol).as_str().to_string()
192 fn item_parent_item(d: rbml::Doc) -> Option<ast::DefId> {
194 reader::tagged_docs(d, tag_items_data_parent_item, |did| {
195 ret = Some(reader::with_doc_data(did, parse_def_id));
201 fn item_reqd_and_translated_parent_item(cnum: ast::CrateNum,
202 d: rbml::Doc) -> ast::DefId {
203 let trait_did = item_parent_item(d).expect("item without parent");
204 ast::DefId { krate: cnum, node: trait_did.node }
207 fn item_def_id(d: rbml::Doc, cdata: Cmd) -> ast::DefId {
208 let tagdoc = reader::get_doc(d, tag_def_id);
209 return translate_def_id(cdata, reader::with_doc_data(tagdoc, parse_def_id));
212 fn get_provided_source(d: rbml::Doc, cdata: Cmd) -> Option<ast::DefId> {
213 reader::maybe_get_doc(d, tag_item_method_provided_source).map(|doc| {
214 translate_def_id(cdata, reader::with_doc_data(doc, parse_def_id))
218 fn each_reexport<F>(d: rbml::Doc, f: F) -> bool where
219 F: FnMut(rbml::Doc) -> bool,
221 reader::tagged_docs(d, tag_items_data_item_reexport, f)
224 fn variant_disr_val(d: rbml::Doc) -> Option<ty::Disr> {
225 reader::maybe_get_doc(d, tag_disr_val).and_then(|val_doc| {
226 reader::with_doc_data(val_doc, |data| {
227 str::from_utf8(data).ok().and_then(|s| s.parse())
232 fn doc_type<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
233 let tp = reader::get_doc(doc, tag_items_data_item_type);
234 parse_ty_data(tp.data, cdata.cnum, tp.start, tcx,
235 |_, did| translate_def_id(cdata, did))
238 fn doc_method_fty<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>,
239 cdata: Cmd) -> ty::BareFnTy<'tcx> {
240 let tp = reader::get_doc(doc, tag_item_method_fty);
241 parse_bare_fn_ty_data(tp.data, cdata.cnum, tp.start, tcx,
242 |_, did| translate_def_id(cdata, did))
245 pub fn item_type<'tcx>(_item_id: ast::DefId, item: rbml::Doc,
246 tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
247 doc_type(item, tcx, cdata)
250 fn doc_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
251 -> Rc<ty::TraitRef<'tcx>> {
252 parse_trait_ref_data(doc.data, cdata.cnum, doc.start, tcx,
253 |_, did| translate_def_id(cdata, did))
256 fn item_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
257 -> Rc<ty::TraitRef<'tcx>> {
258 let tp = reader::get_doc(doc, tag_item_trait_ref);
259 doc_trait_ref(tp, tcx, cdata)
262 fn doc_bounds<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
263 -> ty::ParamBounds<'tcx> {
264 parse_bounds_data(doc.data, cdata.cnum, doc.start, tcx,
265 |_, did| translate_def_id(cdata, did))
268 fn trait_def_bounds<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
269 -> ty::ParamBounds<'tcx> {
270 let d = reader::get_doc(doc, tag_trait_def_bounds);
271 doc_bounds(d, tcx, cdata)
274 fn enum_variant_ids(item: rbml::Doc, cdata: Cmd) -> Vec<ast::DefId> {
275 let mut ids: Vec<ast::DefId> = Vec::new();
276 let v = tag_items_data_item_variant;
277 reader::tagged_docs(item, v, |p| {
278 let ext = reader::with_doc_data(p, parse_def_id);
279 ids.push(ast::DefId { krate: cdata.cnum, node: ext.node });
285 fn item_path(item_doc: rbml::Doc) -> Vec<ast_map::PathElem> {
286 let path_doc = reader::get_doc(item_doc, tag_path);
288 let len_doc = reader::get_doc(path_doc, tag_path_len);
289 let len = reader::doc_as_u32(len_doc) as uint;
291 let mut result = Vec::with_capacity(len);
292 reader::docs(path_doc, |tag, elt_doc| {
293 if tag == tag_path_elem_mod {
294 let s = elt_doc.as_str_slice();
295 result.push(ast_map::PathMod(token::intern(s)));
296 } else if tag == tag_path_elem_name {
297 let s = elt_doc.as_str_slice();
298 result.push(ast_map::PathName(token::intern(s)));
300 // ignore tag_path_len element
308 fn item_name(intr: &IdentInterner, item: rbml::Doc) -> ast::Name {
309 let name = reader::get_doc(item, tag_paths_data_name);
310 let string = name.as_str_slice();
311 match intr.find(string) {
312 None => token::intern(string),
317 fn item_to_def_like(item: rbml::Doc, did: ast::DefId, cnum: ast::CrateNum)
319 let fam = item_family(item);
321 Constant => DlDef(def::DefConst(did)),
322 ImmStatic => DlDef(def::DefStatic(did, false)),
323 MutStatic => DlDef(def::DefStatic(did, true)),
324 Struct => DlDef(def::DefStruct(did)),
325 Fn => DlDef(def::DefFn(did, false)),
326 CtorFn => DlDef(def::DefFn(did, true)),
327 Method | StaticMethod => {
328 // def_static_method carries an optional field of its enclosing
329 // trait or enclosing impl (if this is an inherent static method).
330 // So we need to detect whether this is in a trait or not, which
331 // we do through the mildly hacky way of checking whether there is
332 // a trait_parent_sort.
333 let provenance = if reader::maybe_get_doc(
334 item, tag_item_trait_parent_sort).is_some() {
335 def::FromTrait(item_reqd_and_translated_parent_item(cnum,
338 def::FromImpl(item_reqd_and_translated_parent_item(cnum,
342 // We don't bother to get encode/decode the trait id, we don't need it.
343 Method => DlDef(def::DefMethod(did, None, provenance)),
344 StaticMethod => DlDef(def::DefStaticMethod(did, provenance)),
348 Type | ForeignType => DlDef(def::DefTy(did, false)),
349 Mod => DlDef(def::DefMod(did)),
350 ForeignMod => DlDef(def::DefForeignMod(did)),
352 let enum_did = item_reqd_and_translated_parent_item(cnum, item);
353 DlDef(def::DefVariant(enum_did, did, true))
356 let enum_did = item_reqd_and_translated_parent_item(cnum, item);
357 DlDef(def::DefVariant(enum_did, did, false))
359 Trait => DlDef(def::DefTrait(did)),
360 Enum => DlDef(def::DefTy(did, true)),
362 PublicField | InheritedField => DlField,
366 fn parse_unsafety(item_doc: rbml::Doc) -> ast::Unsafety {
367 let unsafety_doc = reader::get_doc(item_doc, tag_unsafety);
368 if reader::doc_as_u8(unsafety_doc) != 0 {
369 ast::Unsafety::Unsafe
371 ast::Unsafety::Normal
375 fn parse_associated_type_names(item_doc: rbml::Doc) -> Vec<ast::Name> {
376 let names_doc = reader::get_doc(item_doc, tag_associated_type_names);
377 let mut names = Vec::new();
378 reader::tagged_docs(names_doc, tag_associated_type_name, |name_doc| {
379 let name = token::intern(name_doc.as_str_slice());
386 pub fn get_trait_def<'tcx>(cdata: Cmd,
387 item_id: ast::NodeId,
388 tcx: &ty::ctxt<'tcx>) -> ty::TraitDef<'tcx>
390 let item_doc = lookup_item(item_id, cdata.data());
391 let generics = doc_generics(item_doc, tcx, cdata, tag_item_generics);
392 let bounds = trait_def_bounds(item_doc, tcx, cdata);
393 let unsafety = parse_unsafety(item_doc);
394 let associated_type_names = parse_associated_type_names(item_doc);
400 trait_ref: item_trait_ref(item_doc, tcx, cdata),
401 associated_type_names: associated_type_names,
405 pub fn get_type<'tcx>(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt<'tcx>)
406 -> ty::TypeScheme<'tcx> {
408 let item = lookup_item(id, cdata.data());
410 let t = item_type(ast::DefId { krate: cdata.cnum, node: id }, item, tcx,
413 let generics = doc_generics(item, tcx, cdata, tag_item_generics);
421 pub fn get_stability(cdata: Cmd, id: ast::NodeId) -> Option<attr::Stability> {
422 let item = lookup_item(id, cdata.data());
423 reader::maybe_get_doc(item, tag_items_data_item_stability).map(|doc| {
424 let mut decoder = reader::Decoder::new(doc);
425 Decodable::decode(&mut decoder).unwrap()
429 pub fn get_repr_attrs(cdata: Cmd, id: ast::NodeId) -> Vec<attr::ReprAttr> {
430 let item = lookup_item(id, cdata.data());
431 match reader::maybe_get_doc(item, tag_items_data_item_repr).map(|doc| {
432 let mut decoder = reader::Decoder::new(doc);
433 Decodable::decode(&mut decoder).unwrap()
435 Some(attrs) => attrs,
440 pub fn get_impl_trait<'tcx>(cdata: Cmd,
442 tcx: &ty::ctxt<'tcx>)
443 -> Option<Rc<ty::TraitRef<'tcx>>>
445 let item_doc = lookup_item(id, cdata.data());
446 let fam = item_family(item_doc);
449 reader::maybe_get_doc(item_doc, tag_item_trait_ref).map(|tp| {
450 doc_trait_ref(tp, tcx, cdata)
457 pub fn get_impl_vtables<'tcx>(cdata: Cmd,
459 tcx: &ty::ctxt<'tcx>)
460 -> ty::vtable_res<'tcx>
462 let item_doc = lookup_item(id, cdata.data());
463 let vtables_doc = reader::get_doc(item_doc, tag_item_impl_vtables);
464 let mut decoder = reader::Decoder::new(vtables_doc);
465 decoder.read_vtable_res(tcx, cdata)
469 pub fn get_symbol(data: &[u8], id: ast::NodeId) -> String {
470 return item_symbol(lookup_item(id, data));
473 // Something that a name can resolve to.
474 #[derive(Copy, Clone, Show)]
481 /// Iterates over the language items in the given crate.
482 pub fn each_lang_item<F>(cdata: Cmd, mut f: F) -> bool where
483 F: FnMut(ast::NodeId, uint) -> bool,
485 let root = rbml::Doc::new(cdata.data());
486 let lang_items = reader::get_doc(root, tag_lang_items);
487 reader::tagged_docs(lang_items, tag_lang_items_item, |item_doc| {
488 let id_doc = reader::get_doc(item_doc, tag_lang_items_item_id);
489 let id = reader::doc_as_u32(id_doc) as uint;
490 let node_id_doc = reader::get_doc(item_doc,
491 tag_lang_items_item_node_id);
492 let node_id = reader::doc_as_u32(node_id_doc) as ast::NodeId;
498 fn each_child_of_item_or_crate<F, G>(intr: Rc<IdentInterner>,
501 mut get_crate_data: G,
502 mut callback: F) where
503 F: FnMut(DefLike, ast::Name, ast::Visibility),
504 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
506 // Iterate over all children.
507 let _ = reader::tagged_docs(item_doc, tag_mod_child, |child_info_doc| {
508 let child_def_id = reader::with_doc_data(child_info_doc,
510 let child_def_id = translate_def_id(cdata, child_def_id);
512 // This item may be in yet another crate if it was the child of a
514 let crate_data = if child_def_id.krate == cdata.cnum {
517 Some(get_crate_data(child_def_id.krate))
519 let crate_data = match crate_data {
520 Some(ref cdata) => &**cdata,
524 let other_crates_items = reader::get_doc(rbml::Doc::new(crate_data.data()), tag_items);
527 match maybe_find_item(child_def_id.node, other_crates_items) {
529 Some(child_item_doc) => {
530 // Hand off the item to the callback.
531 let child_name = item_name(&*intr, child_item_doc);
532 let def_like = item_to_def_like(child_item_doc,
535 let visibility = item_visibility(child_item_doc);
536 callback(def_like, child_name, visibility);
544 // As a special case, iterate over all static methods of
545 // associated implementations too. This is a bit of a botch.
547 let _ = reader::tagged_docs(item_doc,
548 tag_items_data_item_inherent_impl,
549 |inherent_impl_def_id_doc| {
550 let inherent_impl_def_id = item_def_id(inherent_impl_def_id_doc,
552 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_items);
553 if let Some(inherent_impl_doc) = maybe_find_item(inherent_impl_def_id.node, items) {
554 let _ = reader::tagged_docs(inherent_impl_doc,
556 |impl_item_def_id_doc| {
557 let impl_item_def_id = item_def_id(impl_item_def_id_doc,
559 if let Some(impl_method_doc) = maybe_find_item(impl_item_def_id.node, items) {
560 if let StaticMethod = item_family(impl_method_doc) {
561 // Hand off the static method to the callback.
562 let static_method_name = item_name(&*intr, impl_method_doc);
563 let static_method_def_like = item_to_def_like(impl_method_doc,
566 callback(static_method_def_like,
568 item_visibility(impl_method_doc));
577 // Iterate over all reexports.
578 let _ = each_reexport(item_doc, |reexport_doc| {
579 let def_id_doc = reader::get_doc(reexport_doc,
580 tag_items_data_item_reexport_def_id);
581 let child_def_id = reader::with_doc_data(def_id_doc,
583 let child_def_id = translate_def_id(cdata, child_def_id);
585 let name_doc = reader::get_doc(reexport_doc,
586 tag_items_data_item_reexport_name);
587 let name = name_doc.as_str_slice();
589 // This reexport may be in yet another crate.
590 let crate_data = if child_def_id.krate == cdata.cnum {
593 Some(get_crate_data(child_def_id.krate))
595 let crate_data = match crate_data {
596 Some(ref cdata) => &**cdata,
600 let other_crates_items = reader::get_doc(rbml::Doc::new(crate_data.data()), tag_items);
603 if let Some(child_item_doc) = maybe_find_item(child_def_id.node, other_crates_items) {
604 // Hand off the item to the callback.
605 let def_like = item_to_def_like(child_item_doc,
608 // These items have a public visibility because they're part of
609 // a public re-export.
610 callback(def_like, token::intern(name), ast::Public);
617 /// Iterates over each child of the given item.
618 pub fn each_child_of_item<F, G>(intr: Rc<IdentInterner>,
623 F: FnMut(DefLike, ast::Name, ast::Visibility),
624 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
627 let root_doc = rbml::Doc::new(cdata.data());
628 let items = reader::get_doc(root_doc, tag_items);
629 let item_doc = match maybe_find_item(id, items) {
631 Some(item_doc) => item_doc,
634 each_child_of_item_or_crate(intr,
641 /// Iterates over all the top-level crate items.
642 pub fn each_top_level_item_of_crate<F, G>(intr: Rc<IdentInterner>,
646 F: FnMut(DefLike, ast::Name, ast::Visibility),
647 G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
649 let root_doc = rbml::Doc::new(cdata.data());
650 let misc_info_doc = reader::get_doc(root_doc, tag_misc_info);
651 let crate_items_doc = reader::get_doc(misc_info_doc,
652 tag_misc_info_crate_items);
654 each_child_of_item_or_crate(intr,
661 pub fn get_item_path(cdata: Cmd, id: ast::NodeId) -> Vec<ast_map::PathElem> {
662 item_path(lookup_item(id, cdata.data()))
665 pub type DecodeInlinedItem<'a> = for<'tcx> |cdata: Cmd,
666 tcx: &ty::ctxt<'tcx>,
667 path: Vec<ast_map::PathElem>,
668 par_doc: rbml::Doc|: 'a
669 -> Result<&'tcx ast::InlinedItem,
670 Vec<ast_map::PathElem>>;
672 pub fn maybe_get_item_ast<'tcx>(cdata: Cmd, tcx: &ty::ctxt<'tcx>, id: ast::NodeId,
673 decode_inlined_item: DecodeInlinedItem)
674 -> csearch::found_ast<'tcx> {
675 debug!("Looking up item: {}", id);
676 let item_doc = lookup_item(id, cdata.data());
677 let path = item_path(item_doc).init().to_vec();
678 match decode_inlined_item(cdata, tcx, path, item_doc) {
679 Ok(ii) => csearch::found(ii),
681 match item_parent_item(item_doc) {
683 let did = translate_def_id(cdata, did);
684 let parent_item = lookup_item(did.node, cdata.data());
685 match decode_inlined_item(cdata, tcx, path, parent_item) {
686 Ok(ii) => csearch::found_parent(did, ii),
687 Err(_) => csearch::not_found
690 None => csearch::not_found
696 pub fn get_enum_variant_defs(intr: &IdentInterner,
699 -> Vec<(def::Def, ast::Name, ast::Visibility)> {
700 let data = cdata.data();
701 let items = reader::get_doc(rbml::Doc::new(data), tag_items);
702 let item = find_item(id, items);
703 enum_variant_ids(item, cdata).iter().map(|did| {
704 let item = find_item(did.node, items);
705 let name = item_name(intr, item);
706 let visibility = item_visibility(item);
707 match item_to_def_like(item, *did, cdata.cnum) {
708 DlDef(def @ def::DefVariant(..)) => (def, name, visibility),
714 pub fn get_enum_variants<'tcx>(intr: Rc<IdentInterner>, cdata: Cmd, id: ast::NodeId,
715 tcx: &ty::ctxt<'tcx>) -> Vec<Rc<ty::VariantInfo<'tcx>>> {
716 let data = cdata.data();
717 let items = reader::get_doc(rbml::Doc::new(data), tag_items);
718 let item = find_item(id, items);
719 let mut disr_val = 0;
720 enum_variant_ids(item, cdata).iter().map(|did| {
721 let item = find_item(did.node, items);
722 let ctor_ty = item_type(ast::DefId { krate: cdata.cnum, node: id},
724 let name = item_name(&*intr, item);
725 let (ctor_ty, arg_tys, arg_names) = match ctor_ty.sty {
726 ty::ty_bare_fn(_, ref f) =>
727 (Some(ctor_ty), f.sig.0.inputs.clone(), None),
728 _ => { // Nullary or struct enum variant.
729 let mut arg_names = Vec::new();
730 let arg_tys = get_struct_fields(intr.clone(), cdata, did.node)
733 arg_names.push(ast::Ident::new(field_ty.name));
734 get_type(cdata, field_ty.id.node, tcx).ty
737 let arg_names = if arg_names.len() == 0 { None } else { Some(arg_names) };
739 (None, arg_tys, arg_names)
742 match variant_disr_val(item) {
743 Some(val) => { disr_val = val; }
746 let old_disr_val = disr_val;
748 Rc::new(ty::VariantInfo {
750 arg_names: arg_names,
753 // I'm not even sure if we encode visibility
754 // for variants -- TEST -- tjc
756 disr_val: old_disr_val,
762 fn get_explicit_self(item: rbml::Doc) -> ty::ExplicitSelfCategory {
763 fn get_mutability(ch: u8) -> ast::Mutability {
765 'i' => ast::MutImmutable,
766 'm' => ast::MutMutable,
767 _ => panic!("unknown mutability character: `{}`", ch as char),
771 let explicit_self_doc = reader::get_doc(item, tag_item_trait_method_explicit_self);
772 let string = explicit_self_doc.as_str_slice();
774 let explicit_self_kind = string.as_bytes()[0];
775 match explicit_self_kind as char {
776 's' => ty::StaticExplicitSelfCategory,
777 'v' => ty::ByValueExplicitSelfCategory,
778 '~' => ty::ByBoxExplicitSelfCategory,
779 // FIXME(#4846) expl. region
781 ty::ByReferenceExplicitSelfCategory(
783 get_mutability(string.as_bytes()[1]))
785 _ => panic!("unknown self type code: `{}`", explicit_self_kind as char)
789 /// Returns the def IDs of all the items in the given implementation.
790 pub fn get_impl_items(cdata: Cmd, impl_id: ast::NodeId)
791 -> Vec<ty::ImplOrTraitItemId> {
792 let mut impl_items = Vec::new();
793 reader::tagged_docs(lookup_item(impl_id, cdata.data()),
794 tag_item_impl_item, |doc| {
795 let def_id = item_def_id(doc, cdata);
796 match item_sort(doc) {
797 'r' | 'p' => impl_items.push(ty::MethodTraitItemId(def_id)),
798 't' => impl_items.push(ty::TypeTraitItemId(def_id)),
799 _ => panic!("unknown impl item sort"),
807 pub fn get_trait_name(intr: Rc<IdentInterner>,
811 let doc = lookup_item(id, cdata.data());
812 item_name(&*intr, doc)
815 pub fn get_trait_item_name_and_kind(intr: Rc<IdentInterner>,
818 -> (ast::Name, def::TraitItemKind) {
819 let doc = lookup_item(id, cdata.data());
820 let name = item_name(&*intr, doc);
821 match item_sort(doc) {
823 let explicit_self = get_explicit_self(doc);
824 (name, def::TraitItemKind::from_explicit_self_category(explicit_self))
826 't' => (name, def::TypeTraitItemKind),
828 panic!("get_trait_item_name_and_kind(): unknown trait item kind \
829 in metadata: `{}`", c)
834 pub fn get_impl_or_trait_item<'tcx>(intr: Rc<IdentInterner>,
837 tcx: &ty::ctxt<'tcx>)
838 -> ty::ImplOrTraitItem<'tcx> {
839 let method_doc = lookup_item(id, cdata.data());
841 let def_id = item_def_id(method_doc, cdata);
843 let container_id = item_reqd_and_translated_parent_item(cdata.cnum,
845 let container_doc = lookup_item(container_id.node, cdata.data());
846 let container = match item_family(container_doc) {
847 Trait => TraitContainer(container_id),
848 _ => ImplContainer(container_id),
851 let name = item_name(&*intr, method_doc);
852 let vis = item_visibility(method_doc);
854 match item_sort(method_doc) {
856 let generics = doc_generics(method_doc, tcx, cdata,
857 tag_method_ty_generics);
858 let fty = doc_method_fty(method_doc, tcx, cdata);
859 let explicit_self = get_explicit_self(method_doc);
860 let provided_source = get_provided_source(method_doc, cdata);
862 ty::MethodTraitItem(Rc::new(ty::Method::new(name,
872 ty::TypeTraitItem(Rc::new(ty::AssociatedType {
876 container: container,
879 _ => panic!("unknown impl/trait item sort"),
883 pub fn get_trait_item_def_ids(cdata: Cmd, id: ast::NodeId)
884 -> Vec<ty::ImplOrTraitItemId> {
885 let data = cdata.data();
886 let item = lookup_item(id, data);
887 let mut result = Vec::new();
888 reader::tagged_docs(item, tag_item_trait_item, |mth| {
889 let def_id = item_def_id(mth, cdata);
890 match item_sort(mth) {
891 'r' | 'p' => result.push(ty::MethodTraitItemId(def_id)),
892 't' => result.push(ty::TypeTraitItemId(def_id)),
893 _ => panic!("unknown trait item sort"),
900 pub fn get_item_variances(cdata: Cmd, id: ast::NodeId) -> ty::ItemVariances {
901 let data = cdata.data();
902 let item_doc = lookup_item(id, data);
903 let variance_doc = reader::get_doc(item_doc, tag_item_variances);
904 let mut decoder = reader::Decoder::new(variance_doc);
905 Decodable::decode(&mut decoder).unwrap()
908 pub fn get_provided_trait_methods<'tcx>(intr: Rc<IdentInterner>,
911 tcx: &ty::ctxt<'tcx>)
912 -> Vec<Rc<ty::Method<'tcx>>> {
913 let data = cdata.data();
914 let item = lookup_item(id, data);
915 let mut result = Vec::new();
917 reader::tagged_docs(item, tag_item_trait_item, |mth_id| {
918 let did = item_def_id(mth_id, cdata);
919 let mth = lookup_item(did.node, data);
921 if item_sort(mth) == 'p' {
922 let trait_item = get_impl_or_trait_item(intr.clone(),
927 ty::MethodTraitItem(ref method) => {
928 result.push((*method).clone())
930 ty::TypeTraitItem(_) => {}
939 /// Returns the supertraits of the given trait.
940 pub fn get_supertraits<'tcx>(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt<'tcx>)
941 -> Vec<Rc<ty::TraitRef<'tcx>>> {
942 let mut results = Vec::new();
943 let item_doc = lookup_item(id, cdata.data());
944 reader::tagged_docs(item_doc, tag_item_super_trait_ref, |trait_doc| {
945 // NB. Only reads the ones that *aren't* builtin-bounds. See also
946 // get_trait_def() for collecting the builtin bounds.
947 // FIXME(#8559): The builtin bounds shouldn't be encoded in the first place.
948 let trait_ref = doc_trait_ref(trait_doc, tcx, cdata);
949 if tcx.lang_items.to_builtin_kind(trait_ref.def_id).is_none() {
950 results.push(trait_ref);
957 pub fn get_type_name_if_impl(cdata: Cmd,
958 node_id: ast::NodeId) -> Option<ast::Name> {
959 let item = lookup_item(node_id, cdata.data());
960 if item_family(item) != Impl {
965 reader::tagged_docs(item, tag_item_impl_type_basename, |doc| {
966 ret = Some(token::intern(doc.as_str_slice()));
973 pub fn get_methods_if_impl(intr: Rc<IdentInterner>,
975 node_id: ast::NodeId)
976 -> Option<Vec<MethodInfo> > {
977 let item = lookup_item(node_id, cdata.data());
978 if item_family(item) != Impl {
982 // If this impl implements a trait, don't consider it.
983 let ret = reader::tagged_docs(item, tag_item_trait_ref, |_doc| {
987 if !ret { return None }
989 let mut impl_method_ids = Vec::new();
990 reader::tagged_docs(item, tag_item_impl_item, |impl_method_doc| {
991 impl_method_ids.push(item_def_id(impl_method_doc, cdata));
995 let mut impl_methods = Vec::new();
996 for impl_method_id in impl_method_ids.iter() {
997 let impl_method_doc = lookup_item(impl_method_id.node, cdata.data());
998 let family = item_family(impl_method_doc);
1000 StaticMethod | Method => {
1001 impl_methods.push(MethodInfo {
1002 name: item_name(&*intr, impl_method_doc),
1003 def_id: item_def_id(impl_method_doc, cdata),
1004 vis: item_visibility(impl_method_doc),
1011 return Some(impl_methods);
1014 /// If node_id is the constructor of a tuple struct, retrieve the NodeId of
1015 /// the actual type definition, otherwise, return None
1016 pub fn get_tuple_struct_definition_if_ctor(cdata: Cmd,
1017 node_id: ast::NodeId)
1018 -> Option<ast::DefId>
1020 let item = lookup_item(node_id, cdata.data());
1022 reader::tagged_docs(item, tag_items_data_item_is_tuple_struct_ctor, |_| {
1023 ret = Some(item_reqd_and_translated_parent_item(cdata.cnum, item));
1029 pub fn get_item_attrs<F>(cdata: Cmd,
1030 orig_node_id: ast::NodeId,
1032 F: FnOnce(Vec<ast::Attribute>),
1034 // The attributes for a tuple struct are attached to the definition, not the ctor;
1035 // we assume that someone passing in a tuple struct ctor is actually wanting to
1036 // look at the definition
1037 let node_id = get_tuple_struct_definition_if_ctor(cdata, orig_node_id);
1038 let node_id = node_id.map(|x| x.node).unwrap_or(orig_node_id);
1039 let item = lookup_item(node_id, cdata.data());
1040 f(get_attributes(item));
1043 pub fn get_struct_field_attrs(cdata: Cmd) -> HashMap<ast::NodeId, Vec<ast::Attribute>> {
1044 let data = rbml::Doc::new(cdata.data());
1045 let fields = reader::get_doc(data, tag_struct_fields);
1046 let mut map = HashMap::new();
1047 reader::tagged_docs(fields, tag_struct_field, |field| {
1048 let id = reader::doc_as_u32(reader::get_doc(field, tag_struct_field_id));
1049 let attrs = get_attributes(field);
1050 map.insert(id, attrs);
1056 fn struct_field_family_to_visibility(family: Family) -> ast::Visibility {
1058 PublicField => ast::Public,
1059 InheritedField => ast::Inherited,
1064 pub fn get_struct_fields(intr: Rc<IdentInterner>, cdata: Cmd, id: ast::NodeId)
1065 -> Vec<ty::field_ty> {
1066 let data = cdata.data();
1067 let item = lookup_item(id, data);
1068 let mut result = Vec::new();
1069 reader::tagged_docs(item, tag_item_field, |an_item| {
1070 let f = item_family(an_item);
1071 if f == PublicField || f == InheritedField {
1072 let name = item_name(&*intr, an_item);
1073 let did = item_def_id(an_item, cdata);
1074 let tagdoc = reader::get_doc(an_item, tag_item_field_origin);
1075 let origin_id = translate_def_id(cdata, reader::with_doc_data(tagdoc, parse_def_id));
1076 result.push(ty::field_ty {
1079 vis: struct_field_family_to_visibility(f),
1085 reader::tagged_docs(item, tag_item_unnamed_field, |an_item| {
1086 let did = item_def_id(an_item, cdata);
1087 let tagdoc = reader::get_doc(an_item, tag_item_field_origin);
1088 let f = item_family(an_item);
1089 let origin_id = translate_def_id(cdata, reader::with_doc_data(tagdoc, parse_def_id));
1090 result.push(ty::field_ty {
1091 name: special_idents::unnamed_field.name,
1093 vis: struct_field_family_to_visibility(f),
1101 fn get_meta_items(md: rbml::Doc) -> Vec<P<ast::MetaItem>> {
1102 let mut items: Vec<P<ast::MetaItem>> = Vec::new();
1103 reader::tagged_docs(md, tag_meta_item_word, |meta_item_doc| {
1104 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1105 let n = token::intern_and_get_ident(nd.as_str_slice());
1106 items.push(attr::mk_word_item(n));
1109 reader::tagged_docs(md, tag_meta_item_name_value, |meta_item_doc| {
1110 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1111 let vd = reader::get_doc(meta_item_doc, tag_meta_item_value);
1112 let n = token::intern_and_get_ident(nd.as_str_slice());
1113 let v = token::intern_and_get_ident(vd.as_str_slice());
1114 // FIXME (#623): Should be able to decode MetaNameValue variants,
1115 // but currently the encoder just drops them
1116 items.push(attr::mk_name_value_item_str(n, v));
1119 reader::tagged_docs(md, tag_meta_item_list, |meta_item_doc| {
1120 let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
1121 let n = token::intern_and_get_ident(nd.as_str_slice());
1122 let subitems = get_meta_items(meta_item_doc);
1123 items.push(attr::mk_list_item(n, subitems.into_iter().collect()));
1129 fn get_attributes(md: rbml::Doc) -> Vec<ast::Attribute> {
1130 let mut attrs: Vec<ast::Attribute> = Vec::new();
1131 match reader::maybe_get_doc(md, tag_attributes) {
1133 reader::tagged_docs(attrs_d, tag_attribute, |attr_doc| {
1134 let is_sugared_doc = reader::doc_as_u8(
1135 reader::get_doc(attr_doc, tag_attribute_is_sugared_doc)
1137 let meta_items = get_meta_items(attr_doc);
1138 // Currently it's only possible to have a single meta item on
1140 assert_eq!(meta_items.len(), 1u);
1141 let meta_item = meta_items.into_iter().nth(0).unwrap();
1144 node: ast::Attribute_ {
1145 id: attr::mk_attr_id(),
1146 style: ast::AttrOuter,
1148 is_sugared_doc: is_sugared_doc,
1150 span: codemap::DUMMY_SP
1160 fn list_crate_attributes(md: rbml::Doc, hash: &Svh,
1161 out: &mut io::Writer) -> io::IoResult<()> {
1162 try!(write!(out, "=Crate Attributes ({})=\n", *hash));
1164 let r = get_attributes(md);
1165 for attr in r.iter() {
1166 try!(write!(out, "{}\n", pprust::attribute_to_string(attr)));
1172 pub fn get_crate_attributes(data: &[u8]) -> Vec<ast::Attribute> {
1173 get_attributes(rbml::Doc::new(data))
1177 pub struct CrateDep {
1178 pub cnum: ast::CrateNum,
1183 pub fn get_crate_deps(data: &[u8]) -> Vec<CrateDep> {
1184 let mut deps: Vec<CrateDep> = Vec::new();
1185 let cratedoc = rbml::Doc::new(data);
1186 let depsdoc = reader::get_doc(cratedoc, tag_crate_deps);
1187 let mut crate_num = 1;
1188 fn docstr(doc: rbml::Doc, tag_: uint) -> String {
1189 let d = reader::get_doc(doc, tag_);
1190 d.as_str_slice().to_string()
1192 reader::tagged_docs(depsdoc, tag_crate_dep, |depdoc| {
1193 let name = docstr(depdoc, tag_crate_dep_crate_name);
1194 let hash = Svh::new(docstr(depdoc, tag_crate_dep_hash)[]);
1195 deps.push(CrateDep {
1206 fn list_crate_deps(data: &[u8], out: &mut io::Writer) -> io::IoResult<()> {
1207 try!(write!(out, "=External Dependencies=\n"));
1208 for dep in get_crate_deps(data).iter() {
1209 try!(write!(out, "{} {}-{}\n", dep.cnum, dep.name, dep.hash));
1211 try!(write!(out, "\n"));
1215 pub fn maybe_get_crate_hash(data: &[u8]) -> Option<Svh> {
1216 let cratedoc = rbml::Doc::new(data);
1217 reader::maybe_get_doc(cratedoc, tag_crate_hash).map(|doc| {
1218 Svh::new(doc.as_str_slice())
1222 pub fn get_crate_hash(data: &[u8]) -> Svh {
1223 let cratedoc = rbml::Doc::new(data);
1224 let hashdoc = reader::get_doc(cratedoc, tag_crate_hash);
1225 Svh::new(hashdoc.as_str_slice())
1228 pub fn maybe_get_crate_name(data: &[u8]) -> Option<String> {
1229 let cratedoc = rbml::Doc::new(data);
1230 reader::maybe_get_doc(cratedoc, tag_crate_crate_name).map(|doc| {
1231 doc.as_str_slice().to_string()
1235 pub fn get_crate_triple(data: &[u8]) -> Option<String> {
1236 let cratedoc = rbml::Doc::new(data);
1237 let triple_doc = reader::maybe_get_doc(cratedoc, tag_crate_triple);
1238 triple_doc.map(|s| s.as_str().to_string())
1241 pub fn get_crate_name(data: &[u8]) -> String {
1242 maybe_get_crate_name(data).expect("no crate name in crate")
1245 pub fn list_crate_metadata(bytes: &[u8], out: &mut io::Writer) -> io::IoResult<()> {
1246 let hash = get_crate_hash(bytes);
1247 let md = rbml::Doc::new(bytes);
1248 try!(list_crate_attributes(md, &hash, out));
1249 list_crate_deps(bytes, out)
1252 // Translates a def_id from an external crate to a def_id for the current
1253 // compilation environment. We use this when trying to load types from
1254 // external crates - if those types further refer to types in other crates
1255 // then we must translate the crate number from that encoded in the external
1256 // crate to the correct local crate number.
1257 pub fn translate_def_id(cdata: Cmd, did: ast::DefId) -> ast::DefId {
1258 if did.krate == ast::LOCAL_CRATE {
1259 return ast::DefId { krate: cdata.cnum, node: did.node };
1262 match cdata.cnum_map.get(&did.krate) {
1269 None => panic!("didn't find a crate in the cnum_map")
1273 pub fn each_impl<F>(cdata: Cmd, mut callback: F) where
1274 F: FnMut(ast::DefId),
1276 let impls_doc = reader::get_doc(rbml::Doc::new(cdata.data()), tag_impls);
1277 let _ = reader::tagged_docs(impls_doc, tag_impls_impl, |impl_doc| {
1278 callback(item_def_id(impl_doc, cdata));
1283 pub fn each_implementation_for_type<F>(cdata: Cmd,
1286 where F: FnMut(ast::DefId),
1288 let item_doc = lookup_item(id, cdata.data());
1289 reader::tagged_docs(item_doc,
1290 tag_items_data_item_inherent_impl,
1292 let implementation_def_id = item_def_id(impl_doc, cdata);
1293 callback(implementation_def_id);
1298 pub fn each_implementation_for_trait<F>(cdata: Cmd,
1300 mut callback: F) where
1301 F: FnMut(ast::DefId),
1303 let item_doc = lookup_item(id, cdata.data());
1305 let _ = reader::tagged_docs(item_doc,
1306 tag_items_data_item_extension_impl,
1308 let implementation_def_id = item_def_id(impl_doc, cdata);
1309 callback(implementation_def_id);
1314 pub fn get_trait_of_item(cdata: Cmd, id: ast::NodeId, tcx: &ty::ctxt)
1315 -> Option<ast::DefId> {
1316 let item_doc = lookup_item(id, cdata.data());
1317 let parent_item_id = match item_parent_item(item_doc) {
1318 None => return None,
1319 Some(item_id) => item_id,
1321 let parent_item_id = translate_def_id(cdata, parent_item_id);
1322 let parent_item_doc = lookup_item(parent_item_id.node, cdata.data());
1323 match item_family(parent_item_doc) {
1324 Trait => Some(item_def_id(parent_item_doc, cdata)),
1326 reader::maybe_get_doc(parent_item_doc, tag_item_trait_ref)
1327 .map(|_| item_trait_ref(parent_item_doc, tcx, cdata).def_id)
1334 pub fn get_native_libraries(cdata: Cmd)
1335 -> Vec<(cstore::NativeLibraryKind, String)> {
1336 let libraries = reader::get_doc(rbml::Doc::new(cdata.data()),
1337 tag_native_libraries);
1338 let mut result = Vec::new();
1339 reader::tagged_docs(libraries, tag_native_libraries_lib, |lib_doc| {
1340 let kind_doc = reader::get_doc(lib_doc, tag_native_libraries_kind);
1341 let name_doc = reader::get_doc(lib_doc, tag_native_libraries_name);
1342 let kind: cstore::NativeLibraryKind =
1343 FromPrimitive::from_u32(reader::doc_as_u32(kind_doc)).unwrap();
1344 let name = name_doc.as_str().to_string();
1345 result.push((kind, name));
1351 pub fn get_plugin_registrar_fn(data: &[u8]) -> Option<ast::NodeId> {
1352 reader::maybe_get_doc(rbml::Doc::new(data), tag_plugin_registrar_fn)
1353 .map(|doc| FromPrimitive::from_u32(reader::doc_as_u32(doc)).unwrap())
1356 pub fn get_exported_macros(data: &[u8]) -> Vec<String> {
1357 let macros = reader::get_doc(rbml::Doc::new(data),
1358 tag_exported_macros);
1359 let mut result = Vec::new();
1360 reader::tagged_docs(macros, tag_macro_def, |macro_doc| {
1361 result.push(macro_doc.as_str().to_string());
1367 pub fn get_dylib_dependency_formats(cdata: Cmd)
1368 -> Vec<(ast::CrateNum, cstore::LinkagePreference)>
1370 let formats = reader::get_doc(rbml::Doc::new(cdata.data()),
1371 tag_dylib_dependency_formats);
1372 let mut result = Vec::new();
1374 debug!("found dylib deps: {}", formats.as_str_slice());
1375 for spec in formats.as_str_slice().split(',') {
1376 if spec.len() == 0 { continue }
1377 let cnum = spec.split(':').nth(0).unwrap();
1378 let link = spec.split(':').nth(1).unwrap();
1379 let cnum: ast::CrateNum = cnum.parse().unwrap();
1380 let cnum = match cdata.cnum_map.get(&cnum) {
1382 None => panic!("didn't find a crate in the cnum_map")
1384 result.push((cnum, if link == "d" {
1385 cstore::RequireDynamic
1387 cstore::RequireStatic
1393 pub fn get_missing_lang_items(cdata: Cmd)
1394 -> Vec<lang_items::LangItem>
1396 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_lang_items);
1397 let mut result = Vec::new();
1398 reader::tagged_docs(items, tag_lang_items_missing, |missing_docs| {
1399 let item: lang_items::LangItem =
1400 FromPrimitive::from_u32(reader::doc_as_u32(missing_docs)).unwrap();
1407 pub fn get_method_arg_names(cdata: Cmd, id: ast::NodeId) -> Vec<String> {
1408 let mut ret = Vec::new();
1409 let method_doc = lookup_item(id, cdata.data());
1410 match reader::maybe_get_doc(method_doc, tag_method_argument_names) {
1412 reader::tagged_docs(args_doc, tag_method_argument_name, |name_doc| {
1413 ret.push(name_doc.as_str_slice().to_string());
1422 pub fn get_reachable_extern_fns(cdata: Cmd) -> Vec<ast::DefId> {
1423 let mut ret = Vec::new();
1424 let items = reader::get_doc(rbml::Doc::new(cdata.data()),
1425 tag_reachable_extern_fns);
1426 reader::tagged_docs(items, tag_reachable_extern_fn_id, |doc| {
1427 ret.push(ast::DefId {
1429 node: reader::doc_as_u32(doc),
1436 pub fn is_typedef(cdata: Cmd, id: ast::NodeId) -> bool {
1437 let item_doc = lookup_item(id, cdata.data());
1438 match item_family(item_doc) {
1444 fn doc_generics<'tcx>(base_doc: rbml::Doc,
1445 tcx: &ty::ctxt<'tcx>,
1448 -> ty::Generics<'tcx>
1450 let doc = reader::get_doc(base_doc, tag);
1452 let mut types = subst::VecPerParamSpace::empty();
1453 reader::tagged_docs(doc, tag_type_param_def, |p| {
1454 let bd = parse_type_param_def_data(
1455 p.data, p.start, cdata.cnum, tcx,
1456 |_, did| translate_def_id(cdata, did));
1457 types.push(bd.space, bd);
1461 let mut regions = subst::VecPerParamSpace::empty();
1462 reader::tagged_docs(doc, tag_region_param_def, |rp_doc| {
1463 let ident_str_doc = reader::get_doc(rp_doc,
1464 tag_region_param_def_ident);
1465 let name = item_name(&*token::get_ident_interner(), ident_str_doc);
1466 let def_id_doc = reader::get_doc(rp_doc,
1467 tag_region_param_def_def_id);
1468 let def_id = reader::with_doc_data(def_id_doc, parse_def_id);
1469 let def_id = translate_def_id(cdata, def_id);
1471 let doc = reader::get_doc(rp_doc, tag_region_param_def_space);
1472 let space = subst::ParamSpace::from_uint(reader::doc_as_u64(doc) as uint);
1474 let doc = reader::get_doc(rp_doc, tag_region_param_def_index);
1475 let index = reader::doc_as_u64(doc) as u32;
1477 let mut bounds = Vec::new();
1478 reader::tagged_docs(rp_doc, tag_items_data_region, |p| {
1481 p.data, cdata.cnum, p.start, tcx,
1482 |_, did| translate_def_id(cdata, did)));
1486 regions.push(space, ty::RegionParameterDef { name: name,
1495 let mut predicates = subst::VecPerParamSpace::empty();
1496 reader::tagged_docs(doc, tag_predicate, |predicate_doc| {
1497 let space_doc = reader::get_doc(predicate_doc, tag_predicate_space);
1498 let space = subst::ParamSpace::from_uint(reader::doc_as_u8(space_doc) as uint);
1500 let data_doc = reader::get_doc(predicate_doc, tag_predicate_data);
1501 let data = parse_predicate_data(data_doc.data, data_doc.start, cdata.cnum, tcx,
1502 |_, did| translate_def_id(cdata, did));
1504 predicates.push(space, data);
1508 ty::Generics { types: types, regions: regions, predicates: predicates }
1511 pub fn is_associated_type(cdata: Cmd, id: ast::NodeId) -> bool {
1512 let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_items);
1513 match maybe_find_item(id, items) {
1515 Some(item) => item_sort(item) == 't',