1751 lines
62 KiB
Rust
1751 lines
62 KiB
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Decoding metadata from a single crate's metadata
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#![allow(non_camel_case_types)]
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use self::Family::*;
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use cstore::{self, crate_metadata};
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use common::*;
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use encoder::def_to_u64;
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use index;
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use tls_context;
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use tydecode::TyDecoder;
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use rustc::back::svh::Svh;
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use rustc::front::map as hir_map;
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use rustc::util::nodemap::FnvHashMap;
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use rustc_front::hir;
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use middle::cstore::{LOCAL_CRATE, FoundAst, InlinedItem, LinkagePreference};
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use middle::cstore::{DefLike, DlDef, DlField, DlImpl, tls};
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use middle::def::Def;
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use middle::def_id::{DefId, DefIndex};
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use middle::lang_items;
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use middle::subst;
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use middle::ty::{ImplContainer, TraitContainer};
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use middle::ty::{self, Ty, TypeFoldable, VariantKind};
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use rustc::mir;
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use rustc::mir::visit::MutVisitor;
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use std::cell::Cell;
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use std::io::prelude::*;
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use std::io;
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use std::rc::Rc;
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use std::str;
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use rbml::reader;
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use rbml;
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use serialize::Decodable;
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use syntax::attr;
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use syntax::parse::token::{IdentInterner, special_idents};
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use syntax::parse::token;
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use syntax::ast;
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use syntax::abi::Abi;
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use syntax::codemap::{self, Span, BytePos, NO_EXPANSION};
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use syntax::print::pprust;
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use syntax::ptr::P;
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pub type Cmd<'a> = &'a crate_metadata;
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impl crate_metadata {
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fn get_item(&self, item_id: DefIndex) -> Option<rbml::Doc> {
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self.index.lookup_item(self.data(), item_id).map(|pos| {
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reader::doc_at(self.data(), pos as usize).unwrap().doc
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})
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}
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fn lookup_item(&self, item_id: DefIndex) -> rbml::Doc {
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match self.get_item(item_id) {
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None => panic!("lookup_item: id not found: {:?}", item_id),
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Some(d) => d
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}
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}
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}
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pub fn load_index(data: &[u8]) -> index::Index {
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let index = reader::get_doc(rbml::Doc::new(data), tag_index);
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index::Index::from_rbml(index)
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}
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pub fn crate_rustc_version(data: &[u8]) -> Option<String> {
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let doc = rbml::Doc::new(data);
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reader::maybe_get_doc(doc, tag_rustc_version).map(|s| s.as_str())
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}
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pub fn load_xrefs(data: &[u8]) -> index::DenseIndex {
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let index = reader::get_doc(rbml::Doc::new(data), tag_xref_index);
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index::DenseIndex::from_buf(index.data, index.start, index.end)
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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enum Family {
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ImmStatic, // c
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MutStatic, // b
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Fn, // f
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StaticMethod, // F
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Method, // h
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Type, // y
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Mod, // m
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ForeignMod, // n
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Enum, // t
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Variant(VariantKind), // V, v, w
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Impl, // i
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DefaultImpl, // d
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Trait, // I
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Struct(VariantKind), // S, s, u
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PublicField, // g
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InheritedField, // N
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Constant, // C
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}
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fn item_family(item: rbml::Doc) -> Family {
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let fam = reader::get_doc(item, tag_items_data_item_family);
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match reader::doc_as_u8(fam) as char {
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'C' => Constant,
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'c' => ImmStatic,
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'b' => MutStatic,
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'f' => Fn,
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'F' => StaticMethod,
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'h' => Method,
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'y' => Type,
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'm' => Mod,
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'n' => ForeignMod,
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't' => Enum,
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'V' => Variant(VariantKind::Struct),
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'v' => Variant(VariantKind::Tuple),
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'w' => Variant(VariantKind::Unit),
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'i' => Impl,
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'd' => DefaultImpl,
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'I' => Trait,
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'S' => Struct(VariantKind::Struct),
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's' => Struct(VariantKind::Tuple),
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'u' => Struct(VariantKind::Unit),
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'g' => PublicField,
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'N' => InheritedField,
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c => panic!("unexpected family char: {}", c)
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}
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}
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fn item_visibility(item: rbml::Doc) -> hir::Visibility {
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match reader::maybe_get_doc(item, tag_items_data_item_visibility) {
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None => hir::Public,
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Some(visibility_doc) => {
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match reader::doc_as_u8(visibility_doc) as char {
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'y' => hir::Public,
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'i' => hir::Inherited,
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_ => panic!("unknown visibility character")
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}
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}
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}
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}
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fn fn_constness(item: rbml::Doc) -> hir::Constness {
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match reader::maybe_get_doc(item, tag_items_data_item_constness) {
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None => hir::Constness::NotConst,
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Some(constness_doc) => {
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match reader::doc_as_u8(constness_doc) as char {
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'c' => hir::Constness::Const,
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'n' => hir::Constness::NotConst,
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_ => panic!("unknown constness character")
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}
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}
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}
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}
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fn item_sort(item: rbml::Doc) -> Option<char> {
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reader::tagged_docs(item, tag_item_trait_item_sort).nth(0).map(|doc| {
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doc.as_str_slice().as_bytes()[0] as char
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})
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}
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fn item_symbol(item: rbml::Doc) -> String {
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reader::get_doc(item, tag_items_data_item_symbol).as_str().to_string()
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}
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fn translated_def_id(cdata: Cmd, d: rbml::Doc) -> DefId {
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let id = reader::doc_as_u64(d);
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let index = DefIndex::new((id & 0xFFFF_FFFF) as usize);
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let def_id = DefId { krate: (id >> 32) as u32, index: index };
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translate_def_id(cdata, def_id)
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}
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fn item_parent_item(cdata: Cmd, d: rbml::Doc) -> Option<DefId> {
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reader::tagged_docs(d, tag_items_data_parent_item).nth(0).map(|did| {
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translated_def_id(cdata, did)
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})
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}
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fn item_require_parent_item(cdata: Cmd, d: rbml::Doc) -> DefId {
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translated_def_id(cdata, reader::get_doc(d, tag_items_data_parent_item))
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}
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fn item_def_id(d: rbml::Doc, cdata: Cmd) -> DefId {
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translated_def_id(cdata, reader::get_doc(d, tag_def_id))
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}
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fn reexports<'a>(d: rbml::Doc<'a>) -> reader::TaggedDocsIterator<'a> {
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reader::tagged_docs(d, tag_items_data_item_reexport)
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}
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fn variant_disr_val(d: rbml::Doc) -> Option<ty::Disr> {
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reader::maybe_get_doc(d, tag_disr_val).and_then(|val_doc| {
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reader::with_doc_data(val_doc, |data| {
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str::from_utf8(data).ok().and_then(|s| s.parse().ok())
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})
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})
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}
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fn doc_type<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
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let tp = reader::get_doc(doc, tag_items_data_item_type);
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TyDecoder::with_doc(tcx, cdata.cnum, tp,
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&mut |did| translate_def_id(cdata, did))
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.parse_ty()
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}
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fn maybe_doc_type<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Option<Ty<'tcx>> {
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reader::maybe_get_doc(doc, tag_items_data_item_type).map(|tp| {
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TyDecoder::with_doc(tcx, cdata.cnum, tp,
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&mut |did| translate_def_id(cdata, did))
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.parse_ty()
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})
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}
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pub fn item_type<'tcx>(_item_id: DefId, item: rbml::Doc,
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tcx: &ty::ctxt<'tcx>, cdata: Cmd) -> Ty<'tcx> {
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doc_type(item, tcx, cdata)
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}
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fn doc_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
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-> ty::TraitRef<'tcx> {
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TyDecoder::with_doc(tcx, cdata.cnum, doc,
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&mut |did| translate_def_id(cdata, did))
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.parse_trait_ref()
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}
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fn item_trait_ref<'tcx>(doc: rbml::Doc, tcx: &ty::ctxt<'tcx>, cdata: Cmd)
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-> ty::TraitRef<'tcx> {
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let tp = reader::get_doc(doc, tag_item_trait_ref);
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doc_trait_ref(tp, tcx, cdata)
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}
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fn item_path(item_doc: rbml::Doc) -> Vec<hir_map::PathElem> {
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let path_doc = reader::get_doc(item_doc, tag_path);
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reader::docs(path_doc).filter_map(|(tag, elt_doc)| {
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if tag == tag_path_elem_mod {
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let s = elt_doc.as_str_slice();
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Some(hir_map::PathMod(token::intern(s)))
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} else if tag == tag_path_elem_name {
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let s = elt_doc.as_str_slice();
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Some(hir_map::PathName(token::intern(s)))
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} else {
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// ignore tag_path_len element
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None
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}
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}).collect()
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}
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fn item_name(intr: &IdentInterner, item: rbml::Doc) -> ast::Name {
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let name = reader::get_doc(item, tag_paths_data_name);
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let string = name.as_str_slice();
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match intr.find(string) {
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None => token::intern(string),
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Some(val) => val,
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}
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}
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fn family_to_variant_kind<'tcx>(family: Family) -> Option<ty::VariantKind> {
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match family {
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Struct(VariantKind::Struct) | Variant(VariantKind::Struct) =>
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Some(ty::VariantKind::Struct),
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Struct(VariantKind::Tuple) | Variant(VariantKind::Tuple) =>
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Some(ty::VariantKind::Tuple),
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Struct(VariantKind::Unit) | Variant(VariantKind::Unit) =>
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Some(ty::VariantKind::Unit),
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_ => None,
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}
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}
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fn item_to_def_like(cdata: Cmd, item: rbml::Doc, did: DefId) -> DefLike {
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let fam = item_family(item);
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match fam {
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Constant => {
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// Check whether we have an associated const item.
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match item_sort(item) {
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Some('C') | Some('c') => {
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DlDef(Def::AssociatedConst(did))
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}
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_ => {
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// Regular const item.
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DlDef(Def::Const(did))
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}
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}
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}
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ImmStatic => DlDef(Def::Static(did, false)),
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MutStatic => DlDef(Def::Static(did, true)),
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Struct(..) => DlDef(Def::Struct(did)),
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Fn => DlDef(Def::Fn(did)),
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Method | StaticMethod => {
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DlDef(Def::Method(did))
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}
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Type => {
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if item_sort(item) == Some('t') {
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let trait_did = item_require_parent_item(cdata, item);
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DlDef(Def::AssociatedTy(trait_did, did))
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} else {
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DlDef(Def::TyAlias(did))
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}
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}
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Mod => DlDef(Def::Mod(did)),
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ForeignMod => DlDef(Def::ForeignMod(did)),
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Variant(..) => {
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let enum_did = item_require_parent_item(cdata, item);
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DlDef(Def::Variant(enum_did, did))
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}
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Trait => DlDef(Def::Trait(did)),
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Enum => DlDef(Def::Enum(did)),
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Impl | DefaultImpl => DlImpl(did),
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PublicField | InheritedField => DlField,
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}
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}
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fn parse_unsafety(item_doc: rbml::Doc) -> hir::Unsafety {
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let unsafety_doc = reader::get_doc(item_doc, tag_unsafety);
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if reader::doc_as_u8(unsafety_doc) != 0 {
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hir::Unsafety::Unsafe
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} else {
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hir::Unsafety::Normal
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}
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}
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fn parse_paren_sugar(item_doc: rbml::Doc) -> bool {
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let paren_sugar_doc = reader::get_doc(item_doc, tag_paren_sugar);
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reader::doc_as_u8(paren_sugar_doc) != 0
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}
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fn parse_polarity(item_doc: rbml::Doc) -> hir::ImplPolarity {
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let polarity_doc = reader::get_doc(item_doc, tag_polarity);
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if reader::doc_as_u8(polarity_doc) != 0 {
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hir::ImplPolarity::Negative
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} else {
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hir::ImplPolarity::Positive
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}
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}
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fn parse_associated_type_names(item_doc: rbml::Doc) -> Vec<ast::Name> {
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let names_doc = reader::get_doc(item_doc, tag_associated_type_names);
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reader::tagged_docs(names_doc, tag_associated_type_name)
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.map(|name_doc| token::intern(name_doc.as_str_slice()))
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.collect()
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}
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pub fn get_trait_def<'tcx>(cdata: Cmd,
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item_id: DefIndex,
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tcx: &ty::ctxt<'tcx>) -> ty::TraitDef<'tcx>
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{
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let item_doc = cdata.lookup_item(item_id);
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let generics = doc_generics(item_doc, tcx, cdata, tag_item_generics);
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let unsafety = parse_unsafety(item_doc);
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let associated_type_names = parse_associated_type_names(item_doc);
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let paren_sugar = parse_paren_sugar(item_doc);
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ty::TraitDef::new(unsafety,
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paren_sugar,
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generics,
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item_trait_ref(item_doc, tcx, cdata),
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associated_type_names)
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}
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pub fn get_adt_def<'tcx>(intr: &IdentInterner,
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cdata: Cmd,
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item_id: DefIndex,
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tcx: &ty::ctxt<'tcx>) -> ty::AdtDefMaster<'tcx>
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{
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fn expect_variant_kind<'tcx>(family: Family, tcx: &ty::ctxt<'tcx>) -> ty::VariantKind {
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match family_to_variant_kind(family) {
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Some(kind) => kind,
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_ => tcx.sess.bug(&format!("unexpected family: {:?}", family)),
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}
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}
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fn get_enum_variants<'tcx>(intr: &IdentInterner,
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cdata: Cmd,
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doc: rbml::Doc,
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tcx: &ty::ctxt<'tcx>) -> Vec<ty::VariantDefData<'tcx, 'tcx>> {
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let mut disr_val = 0;
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reader::tagged_docs(doc, tag_items_data_item_variant).map(|p| {
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let did = translated_def_id(cdata, p);
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let item = cdata.lookup_item(did.index);
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if let Some(disr) = variant_disr_val(item) {
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disr_val = disr;
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}
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let disr = disr_val;
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disr_val = disr_val.wrapping_add(1);
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ty::VariantDefData {
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did: did,
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name: item_name(intr, item),
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fields: get_variant_fields(intr, cdata, item, tcx),
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disr_val: disr,
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kind: expect_variant_kind(item_family(item), tcx),
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}
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}).collect()
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}
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fn get_variant_fields<'tcx>(intr: &IdentInterner,
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cdata: Cmd,
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doc: rbml::Doc,
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tcx: &ty::ctxt<'tcx>) -> Vec<ty::FieldDefData<'tcx, 'tcx>> {
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reader::tagged_docs(doc, tag_item_field).map(|f| {
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let ff = item_family(f);
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match ff {
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PublicField | InheritedField => {},
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_ => tcx.sess.bug(&format!("expected field, found {:?}", ff))
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};
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ty::FieldDefData::new(item_def_id(f, cdata),
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item_name(intr, f),
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struct_field_family_to_visibility(ff))
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}).chain(reader::tagged_docs(doc, tag_item_unnamed_field).map(|f| {
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let ff = item_family(f);
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ty::FieldDefData::new(item_def_id(f, cdata),
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special_idents::unnamed_field.name,
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struct_field_family_to_visibility(ff))
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})).collect()
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}
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fn get_struct_variant<'tcx>(intr: &IdentInterner,
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cdata: Cmd,
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doc: rbml::Doc,
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did: DefId,
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tcx: &ty::ctxt<'tcx>) -> ty::VariantDefData<'tcx, 'tcx> {
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ty::VariantDefData {
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did: did,
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name: item_name(intr, doc),
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fields: get_variant_fields(intr, cdata, doc, tcx),
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disr_val: 0,
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kind: expect_variant_kind(item_family(doc), tcx),
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}
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}
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let doc = cdata.lookup_item(item_id);
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let did = DefId { krate: cdata.cnum, index: item_id };
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let (kind, variants) = match item_family(doc) {
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Enum => {
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(ty::AdtKind::Enum,
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get_enum_variants(intr, cdata, doc, tcx))
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}
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Struct(..) => {
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let ctor_did =
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reader::maybe_get_doc(doc, tag_items_data_item_struct_ctor).
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map_or(did, |ctor_doc| translated_def_id(cdata, ctor_doc));
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(ty::AdtKind::Struct,
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vec![get_struct_variant(intr, cdata, doc, ctor_did, tcx)])
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}
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_ => tcx.sess.bug(
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&format!("get_adt_def called on a non-ADT {:?} - {:?}",
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item_family(doc), did))
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};
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|
|
let adt = tcx.intern_adt_def(did, kind, variants);
|
|
|
|
// this needs to be done *after* the variant is interned,
|
|
// to support recursive structures
|
|
for variant in &adt.variants {
|
|
if variant.kind() == ty::VariantKind::Tuple &&
|
|
adt.adt_kind() == ty::AdtKind::Enum {
|
|
// tuple-like enum variant fields aren't real items - get the types
|
|
// from the ctor.
|
|
debug!("evaluating the ctor-type of {:?}",
|
|
variant.name);
|
|
let ctor_ty = get_type(cdata, variant.did.index, tcx).ty;
|
|
debug!("evaluating the ctor-type of {:?}.. {:?}",
|
|
variant.name,
|
|
ctor_ty);
|
|
let field_tys = match ctor_ty.sty {
|
|
ty::TyBareFn(_, &ty::BareFnTy { sig: ty::Binder(ty::FnSig {
|
|
ref inputs, ..
|
|
}), ..}) => {
|
|
// tuple-struct constructors don't have escaping regions
|
|
assert!(!inputs.has_escaping_regions());
|
|
inputs
|
|
},
|
|
_ => tcx.sess.bug("tuple-variant ctor is not an ADT")
|
|
};
|
|
for (field, &ty) in variant.fields.iter().zip(field_tys.iter()) {
|
|
field.fulfill_ty(ty);
|
|
}
|
|
} else {
|
|
for field in &variant.fields {
|
|
debug!("evaluating the type of {:?}::{:?}", variant.name, field.name);
|
|
let ty = get_type(cdata, field.did.index, tcx).ty;
|
|
field.fulfill_ty(ty);
|
|
debug!("evaluating the type of {:?}::{:?}: {:?}",
|
|
variant.name, field.name, ty);
|
|
}
|
|
}
|
|
}
|
|
|
|
adt
|
|
}
|
|
|
|
pub fn get_predicates<'tcx>(cdata: Cmd,
|
|
item_id: DefIndex,
|
|
tcx: &ty::ctxt<'tcx>)
|
|
-> ty::GenericPredicates<'tcx>
|
|
{
|
|
let item_doc = cdata.lookup_item(item_id);
|
|
doc_predicates(item_doc, tcx, cdata, tag_item_generics)
|
|
}
|
|
|
|
pub fn get_super_predicates<'tcx>(cdata: Cmd,
|
|
item_id: DefIndex,
|
|
tcx: &ty::ctxt<'tcx>)
|
|
-> ty::GenericPredicates<'tcx>
|
|
{
|
|
let item_doc = cdata.lookup_item(item_id);
|
|
doc_predicates(item_doc, tcx, cdata, tag_item_super_predicates)
|
|
}
|
|
|
|
pub fn get_type<'tcx>(cdata: Cmd, id: DefIndex, tcx: &ty::ctxt<'tcx>)
|
|
-> ty::TypeScheme<'tcx>
|
|
{
|
|
let item_doc = cdata.lookup_item(id);
|
|
let t = item_type(DefId { krate: cdata.cnum, index: id }, item_doc, tcx,
|
|
cdata);
|
|
let generics = doc_generics(item_doc, tcx, cdata, tag_item_generics);
|
|
ty::TypeScheme {
|
|
generics: generics,
|
|
ty: t
|
|
}
|
|
}
|
|
|
|
pub fn get_stability(cdata: Cmd, id: DefIndex) -> Option<attr::Stability> {
|
|
let item = cdata.lookup_item(id);
|
|
reader::maybe_get_doc(item, tag_items_data_item_stability).map(|doc| {
|
|
let mut decoder = reader::Decoder::new(doc);
|
|
Decodable::decode(&mut decoder).unwrap()
|
|
})
|
|
}
|
|
|
|
pub fn get_deprecation(cdata: Cmd, id: DefIndex) -> Option<attr::Deprecation> {
|
|
let item = cdata.lookup_item(id);
|
|
reader::maybe_get_doc(item, tag_items_data_item_deprecation).map(|doc| {
|
|
let mut decoder = reader::Decoder::new(doc);
|
|
Decodable::decode(&mut decoder).unwrap()
|
|
})
|
|
}
|
|
|
|
pub fn get_repr_attrs(cdata: Cmd, id: DefIndex) -> Vec<attr::ReprAttr> {
|
|
let item = cdata.lookup_item(id);
|
|
match reader::maybe_get_doc(item, tag_items_data_item_repr).map(|doc| {
|
|
let mut decoder = reader::Decoder::new(doc);
|
|
Decodable::decode(&mut decoder).unwrap()
|
|
}) {
|
|
Some(attrs) => attrs,
|
|
None => Vec::new(),
|
|
}
|
|
}
|
|
|
|
pub fn get_impl_polarity<'tcx>(cdata: Cmd,
|
|
id: DefIndex)
|
|
-> Option<hir::ImplPolarity>
|
|
{
|
|
let item_doc = cdata.lookup_item(id);
|
|
let fam = item_family(item_doc);
|
|
match fam {
|
|
Family::Impl => {
|
|
Some(parse_polarity(item_doc))
|
|
}
|
|
_ => None
|
|
}
|
|
}
|
|
|
|
pub fn get_custom_coerce_unsized_kind<'tcx>(
|
|
cdata: Cmd,
|
|
id: DefIndex)
|
|
-> Option<ty::adjustment::CustomCoerceUnsized>
|
|
{
|
|
let item_doc = cdata.lookup_item(id);
|
|
reader::maybe_get_doc(item_doc, tag_impl_coerce_unsized_kind).map(|kind_doc| {
|
|
let mut decoder = reader::Decoder::new(kind_doc);
|
|
Decodable::decode(&mut decoder).unwrap()
|
|
})
|
|
}
|
|
|
|
pub fn get_impl_trait<'tcx>(cdata: Cmd,
|
|
id: DefIndex,
|
|
tcx: &ty::ctxt<'tcx>)
|
|
-> Option<ty::TraitRef<'tcx>>
|
|
{
|
|
let item_doc = cdata.lookup_item(id);
|
|
let fam = item_family(item_doc);
|
|
match fam {
|
|
Family::Impl | Family::DefaultImpl => {
|
|
reader::maybe_get_doc(item_doc, tag_item_trait_ref).map(|tp| {
|
|
doc_trait_ref(tp, tcx, cdata)
|
|
})
|
|
}
|
|
_ => None
|
|
}
|
|
}
|
|
|
|
pub fn get_symbol(cdata: Cmd, id: DefIndex) -> String {
|
|
return item_symbol(cdata.lookup_item(id));
|
|
}
|
|
|
|
/// If you have a crate_metadata, call get_symbol instead
|
|
pub fn get_symbol_from_buf(data: &[u8], id: DefIndex) -> String {
|
|
let index = load_index(data);
|
|
let pos = index.lookup_item(data, id).unwrap();
|
|
let doc = reader::doc_at(data, pos as usize).unwrap().doc;
|
|
item_symbol(doc)
|
|
}
|
|
|
|
/// Iterates over the language items in the given crate.
|
|
pub fn each_lang_item<F>(cdata: Cmd, mut f: F) -> bool where
|
|
F: FnMut(DefIndex, usize) -> bool,
|
|
{
|
|
let root = rbml::Doc::new(cdata.data());
|
|
let lang_items = reader::get_doc(root, tag_lang_items);
|
|
reader::tagged_docs(lang_items, tag_lang_items_item).all(|item_doc| {
|
|
let id_doc = reader::get_doc(item_doc, tag_lang_items_item_id);
|
|
let id = reader::doc_as_u32(id_doc) as usize;
|
|
let index_doc = reader::get_doc(item_doc, tag_lang_items_item_index);
|
|
let index = DefIndex::from_u32(reader::doc_as_u32(index_doc));
|
|
|
|
f(index, id)
|
|
})
|
|
}
|
|
|
|
fn each_child_of_item_or_crate<F, G>(intr: Rc<IdentInterner>,
|
|
cdata: Cmd,
|
|
item_doc: rbml::Doc,
|
|
mut get_crate_data: G,
|
|
mut callback: F) where
|
|
F: FnMut(DefLike, ast::Name, hir::Visibility),
|
|
G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
|
|
{
|
|
// Iterate over all children.
|
|
for child_info_doc in reader::tagged_docs(item_doc, tag_mod_child) {
|
|
let child_def_id = translated_def_id(cdata, child_info_doc);
|
|
|
|
// This item may be in yet another crate if it was the child of a
|
|
// reexport.
|
|
let crate_data = if child_def_id.krate == cdata.cnum {
|
|
None
|
|
} else {
|
|
Some(get_crate_data(child_def_id.krate))
|
|
};
|
|
let crate_data = match crate_data {
|
|
Some(ref cdata) => &**cdata,
|
|
None => cdata
|
|
};
|
|
|
|
// Get the item.
|
|
match crate_data.get_item(child_def_id.index) {
|
|
None => {}
|
|
Some(child_item_doc) => {
|
|
// Hand off the item to the callback.
|
|
let child_name = item_name(&intr, child_item_doc);
|
|
let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
|
|
let visibility = item_visibility(child_item_doc);
|
|
callback(def_like, child_name, visibility);
|
|
}
|
|
}
|
|
}
|
|
|
|
// As a special case, iterate over all static methods of
|
|
// associated implementations too. This is a bit of a botch.
|
|
// --pcwalton
|
|
for inherent_impl_def_id_doc in reader::tagged_docs(item_doc,
|
|
tag_items_data_item_inherent_impl) {
|
|
let inherent_impl_def_id = item_def_id(inherent_impl_def_id_doc, cdata);
|
|
if let Some(inherent_impl_doc) = cdata.get_item(inherent_impl_def_id.index) {
|
|
for impl_item_def_id_doc in reader::tagged_docs(inherent_impl_doc,
|
|
tag_item_impl_item) {
|
|
let impl_item_def_id = item_def_id(impl_item_def_id_doc,
|
|
cdata);
|
|
if let Some(impl_method_doc) = cdata.get_item(impl_item_def_id.index) {
|
|
if let StaticMethod = item_family(impl_method_doc) {
|
|
// Hand off the static method to the callback.
|
|
let static_method_name = item_name(&intr, impl_method_doc);
|
|
let static_method_def_like = item_to_def_like(cdata, impl_method_doc,
|
|
impl_item_def_id);
|
|
callback(static_method_def_like,
|
|
static_method_name,
|
|
item_visibility(impl_method_doc));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for reexport_doc in reexports(item_doc) {
|
|
let def_id_doc = reader::get_doc(reexport_doc,
|
|
tag_items_data_item_reexport_def_id);
|
|
let child_def_id = translated_def_id(cdata, def_id_doc);
|
|
|
|
let name_doc = reader::get_doc(reexport_doc,
|
|
tag_items_data_item_reexport_name);
|
|
let name = name_doc.as_str_slice();
|
|
|
|
// This reexport may be in yet another crate.
|
|
let crate_data = if child_def_id.krate == cdata.cnum {
|
|
None
|
|
} else {
|
|
Some(get_crate_data(child_def_id.krate))
|
|
};
|
|
let crate_data = match crate_data {
|
|
Some(ref cdata) => &**cdata,
|
|
None => cdata
|
|
};
|
|
|
|
// Get the item.
|
|
if let Some(child_item_doc) = crate_data.get_item(child_def_id.index) {
|
|
// Hand off the item to the callback.
|
|
let def_like = item_to_def_like(crate_data, child_item_doc, child_def_id);
|
|
// These items have a public visibility because they're part of
|
|
// a public re-export.
|
|
callback(def_like, token::intern(name), hir::Public);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Iterates over each child of the given item.
|
|
pub fn each_child_of_item<F, G>(intr: Rc<IdentInterner>,
|
|
cdata: Cmd,
|
|
id: DefIndex,
|
|
get_crate_data: G,
|
|
callback: F) where
|
|
F: FnMut(DefLike, ast::Name, hir::Visibility),
|
|
G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
|
|
{
|
|
// Find the item.
|
|
let item_doc = match cdata.get_item(id) {
|
|
None => return,
|
|
Some(item_doc) => item_doc,
|
|
};
|
|
|
|
each_child_of_item_or_crate(intr,
|
|
cdata,
|
|
item_doc,
|
|
get_crate_data,
|
|
callback)
|
|
}
|
|
|
|
/// Iterates over all the top-level crate items.
|
|
pub fn each_top_level_item_of_crate<F, G>(intr: Rc<IdentInterner>,
|
|
cdata: Cmd,
|
|
get_crate_data: G,
|
|
callback: F) where
|
|
F: FnMut(DefLike, ast::Name, hir::Visibility),
|
|
G: FnMut(ast::CrateNum) -> Rc<crate_metadata>,
|
|
{
|
|
let root_doc = rbml::Doc::new(cdata.data());
|
|
let misc_info_doc = reader::get_doc(root_doc, tag_misc_info);
|
|
let crate_items_doc = reader::get_doc(misc_info_doc,
|
|
tag_misc_info_crate_items);
|
|
|
|
each_child_of_item_or_crate(intr,
|
|
cdata,
|
|
crate_items_doc,
|
|
get_crate_data,
|
|
callback)
|
|
}
|
|
|
|
pub fn get_item_path(cdata: Cmd, id: DefIndex) -> Vec<hir_map::PathElem> {
|
|
item_path(cdata.lookup_item(id))
|
|
}
|
|
|
|
pub fn get_item_name(intr: &IdentInterner, cdata: Cmd, id: DefIndex) -> ast::Name {
|
|
item_name(intr, cdata.lookup_item(id))
|
|
}
|
|
|
|
pub type DecodeInlinedItem<'a> =
|
|
Box<for<'tcx> FnMut(Cmd,
|
|
&ty::ctxt<'tcx>,
|
|
Vec<hir_map::PathElem>, // parent_path
|
|
hir_map::DefPath, // parent_def_path
|
|
rbml::Doc,
|
|
DefId)
|
|
-> Result<&'tcx InlinedItem, (Vec<hir_map::PathElem>,
|
|
hir_map::DefPath)> + 'a>;
|
|
|
|
pub fn maybe_get_item_ast<'tcx>(cdata: Cmd,
|
|
tcx: &ty::ctxt<'tcx>,
|
|
id: DefIndex,
|
|
mut decode_inlined_item: DecodeInlinedItem)
|
|
-> FoundAst<'tcx> {
|
|
debug!("Looking up item: {:?}", id);
|
|
let item_doc = cdata.lookup_item(id);
|
|
let item_did = item_def_id(item_doc, cdata);
|
|
let parent_path = {
|
|
let mut path = item_path(item_doc);
|
|
path.pop();
|
|
path
|
|
};
|
|
let parent_def_path = {
|
|
let mut def_path = def_path(cdata, id);
|
|
def_path.pop();
|
|
def_path
|
|
};
|
|
match decode_inlined_item(cdata,
|
|
tcx,
|
|
parent_path,
|
|
parent_def_path,
|
|
item_doc,
|
|
item_did) {
|
|
Ok(ii) => FoundAst::Found(ii),
|
|
Err((mut parent_path, mut parent_def_path)) => {
|
|
match item_parent_item(cdata, item_doc) {
|
|
Some(parent_did) => {
|
|
// Remove the last element from the paths, since we are now
|
|
// trying to inline the parent.
|
|
parent_path.pop();
|
|
parent_def_path.pop();
|
|
|
|
let parent_item = cdata.lookup_item(parent_did.index);
|
|
match decode_inlined_item(cdata,
|
|
tcx,
|
|
parent_path,
|
|
parent_def_path,
|
|
parent_item,
|
|
parent_did) {
|
|
Ok(ii) => FoundAst::FoundParent(parent_did, ii),
|
|
Err(_) => FoundAst::NotFound
|
|
}
|
|
}
|
|
None => FoundAst::NotFound
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn is_item_mir_available<'tcx>(cdata: Cmd, id: DefIndex) -> bool {
|
|
if let Some(item_doc) = cdata.get_item(id) {
|
|
return reader::maybe_get_doc(item_doc, tag_mir as usize).is_some();
|
|
}
|
|
|
|
false
|
|
}
|
|
|
|
pub fn maybe_get_item_mir<'tcx>(cdata: Cmd,
|
|
tcx: &ty::ctxt<'tcx>,
|
|
id: DefIndex)
|
|
-> Option<mir::repr::Mir<'tcx>> {
|
|
let item_doc = cdata.lookup_item(id);
|
|
|
|
return reader::maybe_get_doc(item_doc, tag_mir as usize).map(|mir_doc| {
|
|
let dcx = tls_context::DecodingContext {
|
|
crate_metadata: cdata,
|
|
tcx: tcx,
|
|
};
|
|
let mut decoder = reader::Decoder::new(mir_doc);
|
|
|
|
let mut mir = decoder.read_opaque(|opaque_decoder, _| {
|
|
tls::enter_decoding_context(&dcx, opaque_decoder, |_, opaque_decoder| {
|
|
Decodable::decode(opaque_decoder)
|
|
})
|
|
}).unwrap();
|
|
|
|
assert!(decoder.position() == mir_doc.end);
|
|
|
|
let mut def_id_and_span_translator = MirDefIdAndSpanTranslator {
|
|
crate_metadata: cdata,
|
|
codemap: tcx.sess.codemap(),
|
|
last_filemap_index_hint: Cell::new(0),
|
|
};
|
|
|
|
def_id_and_span_translator.visit_mir(&mut mir);
|
|
|
|
mir
|
|
});
|
|
|
|
struct MirDefIdAndSpanTranslator<'cdata, 'codemap> {
|
|
crate_metadata: Cmd<'cdata>,
|
|
codemap: &'codemap codemap::CodeMap,
|
|
last_filemap_index_hint: Cell<usize>
|
|
}
|
|
|
|
impl<'v, 'cdata, 'codemap> mir::visit::MutVisitor<'v>
|
|
for MirDefIdAndSpanTranslator<'cdata, 'codemap>
|
|
{
|
|
fn visit_def_id(&mut self, def_id: &mut DefId) {
|
|
*def_id = translate_def_id(self.crate_metadata, *def_id);
|
|
}
|
|
|
|
fn visit_span(&mut self, span: &mut Span) {
|
|
*span = translate_span(self.crate_metadata,
|
|
self.codemap,
|
|
&self.last_filemap_index_hint,
|
|
*span);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn get_explicit_self(item: rbml::Doc) -> ty::ExplicitSelfCategory {
|
|
fn get_mutability(ch: u8) -> hir::Mutability {
|
|
match ch as char {
|
|
'i' => hir::MutImmutable,
|
|
'm' => hir::MutMutable,
|
|
_ => panic!("unknown mutability character: `{}`", ch as char),
|
|
}
|
|
}
|
|
|
|
let explicit_self_doc = reader::get_doc(item, tag_item_trait_method_explicit_self);
|
|
let string = explicit_self_doc.as_str_slice();
|
|
|
|
let explicit_self_kind = string.as_bytes()[0];
|
|
match explicit_self_kind as char {
|
|
's' => ty::ExplicitSelfCategory::Static,
|
|
'v' => ty::ExplicitSelfCategory::ByValue,
|
|
'~' => ty::ExplicitSelfCategory::ByBox,
|
|
// FIXME(#4846) expl. region
|
|
'&' => {
|
|
ty::ExplicitSelfCategory::ByReference(
|
|
ty::ReEmpty,
|
|
get_mutability(string.as_bytes()[1]))
|
|
}
|
|
_ => panic!("unknown self type code: `{}`", explicit_self_kind as char)
|
|
}
|
|
}
|
|
|
|
/// Returns the def IDs of all the items in the given implementation.
|
|
pub fn get_impl_items(cdata: Cmd, impl_id: DefIndex)
|
|
-> Vec<ty::ImplOrTraitItemId> {
|
|
reader::tagged_docs(cdata.lookup_item(impl_id), tag_item_impl_item).map(|doc| {
|
|
let def_id = item_def_id(doc, cdata);
|
|
match item_sort(doc) {
|
|
Some('C') | Some('c') => ty::ConstTraitItemId(def_id),
|
|
Some('r') | Some('p') => ty::MethodTraitItemId(def_id),
|
|
Some('t') => ty::TypeTraitItemId(def_id),
|
|
_ => panic!("unknown impl item sort"),
|
|
}
|
|
}).collect()
|
|
}
|
|
|
|
pub fn get_trait_name(intr: Rc<IdentInterner>,
|
|
cdata: Cmd,
|
|
id: DefIndex)
|
|
-> ast::Name {
|
|
let doc = cdata.lookup_item(id);
|
|
item_name(&intr, doc)
|
|
}
|
|
|
|
pub fn is_static_method(cdata: Cmd, id: DefIndex) -> bool {
|
|
let doc = cdata.lookup_item(id);
|
|
match item_sort(doc) {
|
|
Some('r') | Some('p') => {
|
|
get_explicit_self(doc) == ty::ExplicitSelfCategory::Static
|
|
}
|
|
_ => false
|
|
}
|
|
}
|
|
|
|
pub fn get_impl_or_trait_item<'tcx>(intr: Rc<IdentInterner>,
|
|
cdata: Cmd,
|
|
id: DefIndex,
|
|
tcx: &ty::ctxt<'tcx>)
|
|
-> ty::ImplOrTraitItem<'tcx> {
|
|
let item_doc = cdata.lookup_item(id);
|
|
|
|
let def_id = item_def_id(item_doc, cdata);
|
|
|
|
let container_id = item_require_parent_item(cdata, item_doc);
|
|
let container_doc = cdata.lookup_item(container_id.index);
|
|
let container = match item_family(container_doc) {
|
|
Trait => TraitContainer(container_id),
|
|
_ => ImplContainer(container_id),
|
|
};
|
|
|
|
let name = item_name(&intr, item_doc);
|
|
let vis = item_visibility(item_doc);
|
|
|
|
match item_sort(item_doc) {
|
|
sort @ Some('C') | sort @ Some('c') => {
|
|
let ty = doc_type(item_doc, tcx, cdata);
|
|
ty::ConstTraitItem(Rc::new(ty::AssociatedConst {
|
|
name: name,
|
|
ty: ty,
|
|
vis: vis,
|
|
def_id: def_id,
|
|
container: container,
|
|
has_value: sort == Some('C')
|
|
}))
|
|
}
|
|
Some('r') | Some('p') => {
|
|
let generics = doc_generics(item_doc, tcx, cdata, tag_method_ty_generics);
|
|
let predicates = doc_predicates(item_doc, tcx, cdata, tag_method_ty_generics);
|
|
let ity = tcx.lookup_item_type(def_id).ty;
|
|
let fty = match ity.sty {
|
|
ty::TyBareFn(_, fty) => fty.clone(),
|
|
_ => tcx.sess.bug(&format!(
|
|
"the type {:?} of the method {:?} is not a function?",
|
|
ity, name))
|
|
};
|
|
let explicit_self = get_explicit_self(item_doc);
|
|
|
|
ty::MethodTraitItem(Rc::new(ty::Method::new(name,
|
|
generics,
|
|
predicates,
|
|
fty,
|
|
explicit_self,
|
|
vis,
|
|
def_id,
|
|
container)))
|
|
}
|
|
Some('t') => {
|
|
let ty = maybe_doc_type(item_doc, tcx, cdata);
|
|
ty::TypeTraitItem(Rc::new(ty::AssociatedType {
|
|
name: name,
|
|
ty: ty,
|
|
vis: vis,
|
|
def_id: def_id,
|
|
container: container,
|
|
}))
|
|
}
|
|
_ => panic!("unknown impl/trait item sort"),
|
|
}
|
|
}
|
|
|
|
pub fn get_trait_item_def_ids(cdata: Cmd, id: DefIndex)
|
|
-> Vec<ty::ImplOrTraitItemId> {
|
|
let item = cdata.lookup_item(id);
|
|
reader::tagged_docs(item, tag_item_trait_item).map(|mth| {
|
|
let def_id = item_def_id(mth, cdata);
|
|
match item_sort(mth) {
|
|
Some('C') | Some('c') => ty::ConstTraitItemId(def_id),
|
|
Some('r') | Some('p') => ty::MethodTraitItemId(def_id),
|
|
Some('t') => ty::TypeTraitItemId(def_id),
|
|
_ => panic!("unknown trait item sort"),
|
|
}
|
|
}).collect()
|
|
}
|
|
|
|
pub fn get_item_variances(cdata: Cmd, id: DefIndex) -> ty::ItemVariances {
|
|
let item_doc = cdata.lookup_item(id);
|
|
let variance_doc = reader::get_doc(item_doc, tag_item_variances);
|
|
let mut decoder = reader::Decoder::new(variance_doc);
|
|
Decodable::decode(&mut decoder).unwrap()
|
|
}
|
|
|
|
pub fn get_provided_trait_methods<'tcx>(intr: Rc<IdentInterner>,
|
|
cdata: Cmd,
|
|
id: DefIndex,
|
|
tcx: &ty::ctxt<'tcx>)
|
|
-> Vec<Rc<ty::Method<'tcx>>> {
|
|
let item = cdata.lookup_item(id);
|
|
|
|
reader::tagged_docs(item, tag_item_trait_item).filter_map(|mth_id| {
|
|
let did = item_def_id(mth_id, cdata);
|
|
let mth = cdata.lookup_item(did.index);
|
|
|
|
if item_sort(mth) == Some('p') {
|
|
let trait_item = get_impl_or_trait_item(intr.clone(),
|
|
cdata,
|
|
did.index,
|
|
tcx);
|
|
if let ty::MethodTraitItem(ref method) = trait_item {
|
|
Some((*method).clone())
|
|
} else {
|
|
None
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
}).collect()
|
|
}
|
|
|
|
pub fn get_associated_consts<'tcx>(intr: Rc<IdentInterner>,
|
|
cdata: Cmd,
|
|
id: DefIndex,
|
|
tcx: &ty::ctxt<'tcx>)
|
|
-> Vec<Rc<ty::AssociatedConst<'tcx>>> {
|
|
let item = cdata.lookup_item(id);
|
|
|
|
[tag_item_trait_item, tag_item_impl_item].iter().flat_map(|&tag| {
|
|
reader::tagged_docs(item, tag).filter_map(|ac_id| {
|
|
let did = item_def_id(ac_id, cdata);
|
|
let ac_doc = cdata.lookup_item(did.index);
|
|
|
|
match item_sort(ac_doc) {
|
|
Some('C') | Some('c') => {
|
|
let trait_item = get_impl_or_trait_item(intr.clone(),
|
|
cdata,
|
|
did.index,
|
|
tcx);
|
|
if let ty::ConstTraitItem(ref ac) = trait_item {
|
|
Some((*ac).clone())
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
_ => None
|
|
}
|
|
})
|
|
}).collect()
|
|
}
|
|
|
|
pub fn get_variant_kind(cdata: Cmd, node_id: DefIndex) -> Option<VariantKind>
|
|
{
|
|
let item = cdata.lookup_item(node_id);
|
|
family_to_variant_kind(item_family(item))
|
|
}
|
|
|
|
pub fn get_struct_ctor_def_id(cdata: Cmd, node_id: DefIndex) -> Option<DefId>
|
|
{
|
|
let item = cdata.lookup_item(node_id);
|
|
reader::maybe_get_doc(item, tag_items_data_item_struct_ctor).
|
|
map(|ctor_doc| translated_def_id(cdata, ctor_doc))
|
|
}
|
|
|
|
/// If node_id is the constructor of a tuple struct, retrieve the NodeId of
|
|
/// the actual type definition, otherwise, return None
|
|
pub fn get_tuple_struct_definition_if_ctor(cdata: Cmd,
|
|
node_id: DefIndex)
|
|
-> Option<DefId>
|
|
{
|
|
let item = cdata.lookup_item(node_id);
|
|
reader::tagged_docs(item, tag_items_data_item_is_tuple_struct_ctor).next().map(|_| {
|
|
item_require_parent_item(cdata, item)
|
|
})
|
|
}
|
|
|
|
pub fn get_item_attrs(cdata: Cmd,
|
|
orig_node_id: DefIndex)
|
|
-> Vec<ast::Attribute> {
|
|
// The attributes for a tuple struct are attached to the definition, not the ctor;
|
|
// we assume that someone passing in a tuple struct ctor is actually wanting to
|
|
// look at the definition
|
|
let node_id = get_tuple_struct_definition_if_ctor(cdata, orig_node_id);
|
|
let node_id = node_id.map(|x| x.index).unwrap_or(orig_node_id);
|
|
let item = cdata.lookup_item(node_id);
|
|
get_attributes(item)
|
|
}
|
|
|
|
pub fn get_struct_field_attrs(cdata: Cmd) -> FnvHashMap<DefId, Vec<ast::Attribute>> {
|
|
let data = rbml::Doc::new(cdata.data());
|
|
let fields = reader::get_doc(data, tag_struct_fields);
|
|
reader::tagged_docs(fields, tag_struct_field).map(|field| {
|
|
let def_id = translated_def_id(cdata, reader::get_doc(field, tag_def_id));
|
|
let attrs = get_attributes(field);
|
|
(def_id, attrs)
|
|
}).collect()
|
|
}
|
|
|
|
fn struct_field_family_to_visibility(family: Family) -> hir::Visibility {
|
|
match family {
|
|
PublicField => hir::Public,
|
|
InheritedField => hir::Inherited,
|
|
_ => panic!()
|
|
}
|
|
}
|
|
|
|
pub fn get_struct_field_names(intr: &IdentInterner, cdata: Cmd, id: DefIndex)
|
|
-> Vec<ast::Name> {
|
|
let item = cdata.lookup_item(id);
|
|
reader::tagged_docs(item, tag_item_field).map(|an_item| {
|
|
item_name(intr, an_item)
|
|
}).chain(reader::tagged_docs(item, tag_item_unnamed_field).map(|_| {
|
|
special_idents::unnamed_field.name
|
|
})).collect()
|
|
}
|
|
|
|
fn get_meta_items(md: rbml::Doc) -> Vec<P<ast::MetaItem>> {
|
|
reader::tagged_docs(md, tag_meta_item_word).map(|meta_item_doc| {
|
|
let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
|
|
let n = token::intern_and_get_ident(nd.as_str_slice());
|
|
attr::mk_word_item(n)
|
|
}).chain(reader::tagged_docs(md, tag_meta_item_name_value).map(|meta_item_doc| {
|
|
let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
|
|
let vd = reader::get_doc(meta_item_doc, tag_meta_item_value);
|
|
let n = token::intern_and_get_ident(nd.as_str_slice());
|
|
let v = token::intern_and_get_ident(vd.as_str_slice());
|
|
// FIXME (#623): Should be able to decode MetaItemKind::NameValue variants,
|
|
// but currently the encoder just drops them
|
|
attr::mk_name_value_item_str(n, v)
|
|
})).chain(reader::tagged_docs(md, tag_meta_item_list).map(|meta_item_doc| {
|
|
let nd = reader::get_doc(meta_item_doc, tag_meta_item_name);
|
|
let n = token::intern_and_get_ident(nd.as_str_slice());
|
|
let subitems = get_meta_items(meta_item_doc);
|
|
attr::mk_list_item(n, subitems)
|
|
})).collect()
|
|
}
|
|
|
|
fn get_attributes(md: rbml::Doc) -> Vec<ast::Attribute> {
|
|
match reader::maybe_get_doc(md, tag_attributes) {
|
|
Some(attrs_d) => {
|
|
reader::tagged_docs(attrs_d, tag_attribute).map(|attr_doc| {
|
|
let is_sugared_doc = reader::doc_as_u8(
|
|
reader::get_doc(attr_doc, tag_attribute_is_sugared_doc)
|
|
) == 1;
|
|
let meta_items = get_meta_items(attr_doc);
|
|
// Currently it's only possible to have a single meta item on
|
|
// an attribute
|
|
assert_eq!(meta_items.len(), 1);
|
|
let meta_item = meta_items.into_iter().nth(0).unwrap();
|
|
codemap::Spanned {
|
|
node: ast::Attribute_ {
|
|
id: attr::mk_attr_id(),
|
|
style: ast::AttrStyle::Outer,
|
|
value: meta_item,
|
|
is_sugared_doc: is_sugared_doc,
|
|
},
|
|
span: codemap::DUMMY_SP
|
|
}
|
|
}).collect()
|
|
},
|
|
None => vec![],
|
|
}
|
|
}
|
|
|
|
fn list_crate_attributes(md: rbml::Doc, hash: &Svh,
|
|
out: &mut io::Write) -> io::Result<()> {
|
|
try!(write!(out, "=Crate Attributes ({})=\n", *hash));
|
|
|
|
let r = get_attributes(md);
|
|
for attr in &r {
|
|
try!(write!(out, "{}\n", pprust::attribute_to_string(attr)));
|
|
}
|
|
|
|
write!(out, "\n\n")
|
|
}
|
|
|
|
pub fn get_crate_attributes(data: &[u8]) -> Vec<ast::Attribute> {
|
|
get_attributes(rbml::Doc::new(data))
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
pub struct CrateDep {
|
|
pub cnum: ast::CrateNum,
|
|
pub name: String,
|
|
pub hash: Svh,
|
|
pub explicitly_linked: bool,
|
|
}
|
|
|
|
pub fn get_crate_deps(data: &[u8]) -> Vec<CrateDep> {
|
|
let cratedoc = rbml::Doc::new(data);
|
|
let depsdoc = reader::get_doc(cratedoc, tag_crate_deps);
|
|
|
|
fn docstr(doc: rbml::Doc, tag_: usize) -> String {
|
|
let d = reader::get_doc(doc, tag_);
|
|
d.as_str_slice().to_string()
|
|
}
|
|
|
|
reader::tagged_docs(depsdoc, tag_crate_dep).enumerate().map(|(crate_num, depdoc)| {
|
|
let name = docstr(depdoc, tag_crate_dep_crate_name);
|
|
let hash = Svh::new(&docstr(depdoc, tag_crate_dep_hash));
|
|
let doc = reader::get_doc(depdoc, tag_crate_dep_explicitly_linked);
|
|
let explicitly_linked = reader::doc_as_u8(doc) != 0;
|
|
CrateDep {
|
|
cnum: crate_num as u32 + 1,
|
|
name: name,
|
|
hash: hash,
|
|
explicitly_linked: explicitly_linked,
|
|
}
|
|
}).collect()
|
|
}
|
|
|
|
fn list_crate_deps(data: &[u8], out: &mut io::Write) -> io::Result<()> {
|
|
try!(write!(out, "=External Dependencies=\n"));
|
|
for dep in &get_crate_deps(data) {
|
|
try!(write!(out, "{} {}-{}\n", dep.cnum, dep.name, dep.hash));
|
|
}
|
|
try!(write!(out, "\n"));
|
|
Ok(())
|
|
}
|
|
|
|
pub fn maybe_get_crate_hash(data: &[u8]) -> Option<Svh> {
|
|
let cratedoc = rbml::Doc::new(data);
|
|
reader::maybe_get_doc(cratedoc, tag_crate_hash).map(|doc| {
|
|
Svh::new(doc.as_str_slice())
|
|
})
|
|
}
|
|
|
|
pub fn get_crate_hash(data: &[u8]) -> Svh {
|
|
let cratedoc = rbml::Doc::new(data);
|
|
let hashdoc = reader::get_doc(cratedoc, tag_crate_hash);
|
|
Svh::new(hashdoc.as_str_slice())
|
|
}
|
|
|
|
pub fn maybe_get_crate_name(data: &[u8]) -> Option<String> {
|
|
let cratedoc = rbml::Doc::new(data);
|
|
reader::maybe_get_doc(cratedoc, tag_crate_crate_name).map(|doc| {
|
|
doc.as_str_slice().to_string()
|
|
})
|
|
}
|
|
|
|
pub fn get_crate_triple(data: &[u8]) -> Option<String> {
|
|
let cratedoc = rbml::Doc::new(data);
|
|
let triple_doc = reader::maybe_get_doc(cratedoc, tag_crate_triple);
|
|
triple_doc.map(|s| s.as_str().to_string())
|
|
}
|
|
|
|
pub fn get_crate_name(data: &[u8]) -> String {
|
|
maybe_get_crate_name(data).expect("no crate name in crate")
|
|
}
|
|
|
|
pub fn list_crate_metadata(bytes: &[u8], out: &mut io::Write) -> io::Result<()> {
|
|
let hash = get_crate_hash(bytes);
|
|
let md = rbml::Doc::new(bytes);
|
|
try!(list_crate_attributes(md, &hash, out));
|
|
list_crate_deps(bytes, out)
|
|
}
|
|
|
|
// Translates a def_id from an external crate to a def_id for the current
|
|
// compilation environment. We use this when trying to load types from
|
|
// external crates - if those types further refer to types in other crates
|
|
// then we must translate the crate number from that encoded in the external
|
|
// crate to the correct local crate number.
|
|
pub fn translate_def_id(cdata: Cmd, did: DefId) -> DefId {
|
|
if did.is_local() {
|
|
return DefId { krate: cdata.cnum, index: did.index };
|
|
}
|
|
|
|
match cdata.cnum_map.borrow().get(&did.krate) {
|
|
Some(&n) => {
|
|
DefId {
|
|
krate: n,
|
|
index: did.index,
|
|
}
|
|
}
|
|
None => panic!("didn't find a crate in the cnum_map")
|
|
}
|
|
}
|
|
|
|
// Translate a DefId from the current compilation environment to a DefId
|
|
// for an external crate.
|
|
fn reverse_translate_def_id(cdata: Cmd, did: DefId) -> Option<DefId> {
|
|
if did.krate == cdata.cnum {
|
|
return Some(DefId { krate: LOCAL_CRATE, index: did.index });
|
|
}
|
|
|
|
for (&local, &global) in cdata.cnum_map.borrow().iter() {
|
|
if global == did.krate {
|
|
return Some(DefId { krate: local, index: did.index });
|
|
}
|
|
}
|
|
|
|
None
|
|
}
|
|
|
|
/// Translates a `Span` from an extern crate to the corresponding `Span`
|
|
/// within the local crate's codemap.
|
|
pub fn translate_span(cdata: Cmd,
|
|
codemap: &codemap::CodeMap,
|
|
last_filemap_index_hint: &Cell<usize>,
|
|
span: codemap::Span)
|
|
-> codemap::Span {
|
|
let span = if span.lo > span.hi {
|
|
// Currently macro expansion sometimes produces invalid Span values
|
|
// where lo > hi. In order not to crash the compiler when trying to
|
|
// translate these values, let's transform them into something we
|
|
// can handle (and which will produce useful debug locations at
|
|
// least some of the time).
|
|
// This workaround is only necessary as long as macro expansion is
|
|
// not fixed. FIXME(#23480)
|
|
codemap::mk_sp(span.lo, span.lo)
|
|
} else {
|
|
span
|
|
};
|
|
|
|
let imported_filemaps = cdata.imported_filemaps(&codemap);
|
|
let filemap = {
|
|
// Optimize for the case that most spans within a translated item
|
|
// originate from the same filemap.
|
|
let last_filemap_index = last_filemap_index_hint.get();
|
|
let last_filemap = &imported_filemaps[last_filemap_index];
|
|
|
|
if span.lo >= last_filemap.original_start_pos &&
|
|
span.lo <= last_filemap.original_end_pos &&
|
|
span.hi >= last_filemap.original_start_pos &&
|
|
span.hi <= last_filemap.original_end_pos {
|
|
last_filemap
|
|
} else {
|
|
let mut a = 0;
|
|
let mut b = imported_filemaps.len();
|
|
|
|
while b - a > 1 {
|
|
let m = (a + b) / 2;
|
|
if imported_filemaps[m].original_start_pos > span.lo {
|
|
b = m;
|
|
} else {
|
|
a = m;
|
|
}
|
|
}
|
|
|
|
last_filemap_index_hint.set(a);
|
|
&imported_filemaps[a]
|
|
}
|
|
};
|
|
|
|
let lo = (span.lo - filemap.original_start_pos) +
|
|
filemap.translated_filemap.start_pos;
|
|
let hi = (span.hi - filemap.original_start_pos) +
|
|
filemap.translated_filemap.start_pos;
|
|
|
|
codemap::mk_sp(lo, hi)
|
|
}
|
|
|
|
pub fn each_inherent_implementation_for_type<F>(cdata: Cmd,
|
|
id: DefIndex,
|
|
mut callback: F)
|
|
where F: FnMut(DefId),
|
|
{
|
|
let item_doc = cdata.lookup_item(id);
|
|
for impl_doc in reader::tagged_docs(item_doc, tag_items_data_item_inherent_impl) {
|
|
if reader::maybe_get_doc(impl_doc, tag_item_trait_ref).is_none() {
|
|
callback(item_def_id(impl_doc, cdata));
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn each_implementation_for_trait<F>(cdata: Cmd,
|
|
def_id: DefId,
|
|
mut callback: F) where
|
|
F: FnMut(DefId),
|
|
{
|
|
// Do a reverse lookup beforehand to avoid touching the crate_num
|
|
// hash map in the loop below.
|
|
if let Some(crate_local_did) = reverse_translate_def_id(cdata, def_id) {
|
|
let def_id_u64 = def_to_u64(crate_local_did);
|
|
|
|
let impls_doc = reader::get_doc(rbml::Doc::new(cdata.data()), tag_impls);
|
|
for trait_doc in reader::tagged_docs(impls_doc, tag_impls_trait) {
|
|
let trait_def_id = reader::get_doc(trait_doc, tag_def_id);
|
|
if reader::doc_as_u64(trait_def_id) != def_id_u64 {
|
|
continue;
|
|
}
|
|
for impl_doc in reader::tagged_docs(trait_doc, tag_impls_trait_impl) {
|
|
callback(translated_def_id(cdata, impl_doc));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn get_trait_of_item(cdata: Cmd, id: DefIndex, tcx: &ty::ctxt)
|
|
-> Option<DefId> {
|
|
let item_doc = cdata.lookup_item(id);
|
|
let parent_item_id = match item_parent_item(cdata, item_doc) {
|
|
None => return None,
|
|
Some(item_id) => item_id,
|
|
};
|
|
let parent_item_doc = cdata.lookup_item(parent_item_id.index);
|
|
match item_family(parent_item_doc) {
|
|
Trait => Some(item_def_id(parent_item_doc, cdata)),
|
|
Impl | DefaultImpl => {
|
|
reader::maybe_get_doc(parent_item_doc, tag_item_trait_ref)
|
|
.map(|_| item_trait_ref(parent_item_doc, tcx, cdata).def_id)
|
|
}
|
|
_ => None
|
|
}
|
|
}
|
|
|
|
|
|
pub fn get_native_libraries(cdata: Cmd)
|
|
-> Vec<(cstore::NativeLibraryKind, String)> {
|
|
let libraries = reader::get_doc(rbml::Doc::new(cdata.data()),
|
|
tag_native_libraries);
|
|
reader::tagged_docs(libraries, tag_native_libraries_lib).map(|lib_doc| {
|
|
let kind_doc = reader::get_doc(lib_doc, tag_native_libraries_kind);
|
|
let name_doc = reader::get_doc(lib_doc, tag_native_libraries_name);
|
|
let kind: cstore::NativeLibraryKind =
|
|
cstore::NativeLibraryKind::from_u32(reader::doc_as_u32(kind_doc)).unwrap();
|
|
let name = name_doc.as_str().to_string();
|
|
(kind, name)
|
|
}).collect()
|
|
}
|
|
|
|
pub fn get_plugin_registrar_fn(data: &[u8]) -> Option<DefIndex> {
|
|
reader::maybe_get_doc(rbml::Doc::new(data), tag_plugin_registrar_fn)
|
|
.map(|doc| DefIndex::from_u32(reader::doc_as_u32(doc)))
|
|
}
|
|
|
|
pub fn each_exported_macro<F>(data: &[u8], intr: &IdentInterner, mut f: F) where
|
|
F: FnMut(ast::Name, Vec<ast::Attribute>, Span, String) -> bool,
|
|
{
|
|
let macros = reader::get_doc(rbml::Doc::new(data), tag_macro_defs);
|
|
for macro_doc in reader::tagged_docs(macros, tag_macro_def) {
|
|
let name = item_name(intr, macro_doc);
|
|
let attrs = get_attributes(macro_doc);
|
|
let span = get_macro_span(macro_doc);
|
|
let body = reader::get_doc(macro_doc, tag_macro_def_body);
|
|
if !f(name, attrs, span, body.as_str().to_string()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn get_macro_span(doc: rbml::Doc) -> Span {
|
|
let lo_doc = reader::get_doc(doc, tag_macro_def_span_lo);
|
|
let lo = BytePos(reader::doc_as_u32(lo_doc));
|
|
let hi_doc = reader::get_doc(doc, tag_macro_def_span_hi);
|
|
let hi = BytePos(reader::doc_as_u32(hi_doc));
|
|
return Span { lo: lo, hi: hi, expn_id: NO_EXPANSION };
|
|
}
|
|
|
|
pub fn get_dylib_dependency_formats(cdata: Cmd)
|
|
-> Vec<(ast::CrateNum, LinkagePreference)>
|
|
{
|
|
let formats = reader::get_doc(rbml::Doc::new(cdata.data()),
|
|
tag_dylib_dependency_formats);
|
|
let mut result = Vec::new();
|
|
|
|
debug!("found dylib deps: {}", formats.as_str_slice());
|
|
for spec in formats.as_str_slice().split(',') {
|
|
if spec.is_empty() { continue }
|
|
let cnum = spec.split(':').nth(0).unwrap();
|
|
let link = spec.split(':').nth(1).unwrap();
|
|
let cnum: ast::CrateNum = cnum.parse().unwrap();
|
|
let cnum = match cdata.cnum_map.borrow().get(&cnum) {
|
|
Some(&n) => n,
|
|
None => panic!("didn't find a crate in the cnum_map")
|
|
};
|
|
result.push((cnum, if link == "d" {
|
|
LinkagePreference::RequireDynamic
|
|
} else {
|
|
LinkagePreference::RequireStatic
|
|
}));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
pub fn get_missing_lang_items(cdata: Cmd)
|
|
-> Vec<lang_items::LangItem>
|
|
{
|
|
let items = reader::get_doc(rbml::Doc::new(cdata.data()), tag_lang_items);
|
|
reader::tagged_docs(items, tag_lang_items_missing).map(|missing_docs| {
|
|
lang_items::LangItem::from_u32(reader::doc_as_u32(missing_docs)).unwrap()
|
|
}).collect()
|
|
}
|
|
|
|
pub fn get_method_arg_names(cdata: Cmd, id: DefIndex) -> Vec<String> {
|
|
let method_doc = cdata.lookup_item(id);
|
|
match reader::maybe_get_doc(method_doc, tag_method_argument_names) {
|
|
Some(args_doc) => {
|
|
reader::tagged_docs(args_doc, tag_method_argument_name).map(|name_doc| {
|
|
name_doc.as_str_slice().to_string()
|
|
}).collect()
|
|
},
|
|
None => vec![],
|
|
}
|
|
}
|
|
|
|
pub fn get_reachable_ids(cdata: Cmd) -> Vec<DefId> {
|
|
let items = reader::get_doc(rbml::Doc::new(cdata.data()),
|
|
tag_reachable_ids);
|
|
reader::tagged_docs(items, tag_reachable_id).map(|doc| {
|
|
DefId {
|
|
krate: cdata.cnum,
|
|
index: DefIndex::from_u32(reader::doc_as_u32(doc)),
|
|
}
|
|
}).collect()
|
|
}
|
|
|
|
pub fn is_typedef(cdata: Cmd, id: DefIndex) -> bool {
|
|
let item_doc = cdata.lookup_item(id);
|
|
match item_family(item_doc) {
|
|
Type => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
pub fn is_const_fn(cdata: Cmd, id: DefIndex) -> bool {
|
|
let item_doc = cdata.lookup_item(id);
|
|
match fn_constness(item_doc) {
|
|
hir::Constness::Const => true,
|
|
hir::Constness::NotConst => false,
|
|
}
|
|
}
|
|
|
|
pub fn is_extern_item(cdata: Cmd, id: DefIndex, tcx: &ty::ctxt) -> bool {
|
|
let item_doc = match cdata.get_item(id) {
|
|
Some(doc) => doc,
|
|
None => return false,
|
|
};
|
|
let applicable = match item_family(item_doc) {
|
|
ImmStatic | MutStatic => true,
|
|
Fn => {
|
|
let ty::TypeScheme { generics, ty } = get_type(cdata, id, tcx);
|
|
let no_generics = generics.types.is_empty();
|
|
match ty.sty {
|
|
ty::TyBareFn(_, fn_ty) if fn_ty.abi != Abi::Rust => return no_generics,
|
|
_ => no_generics,
|
|
}
|
|
},
|
|
_ => false,
|
|
};
|
|
|
|
if applicable {
|
|
attr::contains_extern_indicator(tcx.sess.diagnostic(),
|
|
&get_attributes(item_doc))
|
|
} else {
|
|
false
|
|
}
|
|
}
|
|
|
|
pub fn is_impl(cdata: Cmd, id: DefIndex) -> bool {
|
|
let item_doc = cdata.lookup_item(id);
|
|
match item_family(item_doc) {
|
|
Impl => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
fn doc_generics<'tcx>(base_doc: rbml::Doc,
|
|
tcx: &ty::ctxt<'tcx>,
|
|
cdata: Cmd,
|
|
tag: usize)
|
|
-> ty::Generics<'tcx>
|
|
{
|
|
let doc = reader::get_doc(base_doc, tag);
|
|
|
|
let mut types = subst::VecPerParamSpace::empty();
|
|
for p in reader::tagged_docs(doc, tag_type_param_def) {
|
|
let bd =
|
|
TyDecoder::with_doc(tcx, cdata.cnum, p,
|
|
&mut |did| translate_def_id(cdata, did))
|
|
.parse_type_param_def();
|
|
types.push(bd.space, bd);
|
|
}
|
|
|
|
let mut regions = subst::VecPerParamSpace::empty();
|
|
for rp_doc in reader::tagged_docs(doc, tag_region_param_def) {
|
|
let ident_str_doc = reader::get_doc(rp_doc,
|
|
tag_region_param_def_ident);
|
|
let name = item_name(&token::get_ident_interner(), ident_str_doc);
|
|
let def_id_doc = reader::get_doc(rp_doc,
|
|
tag_region_param_def_def_id);
|
|
let def_id = translated_def_id(cdata, def_id_doc);
|
|
|
|
let doc = reader::get_doc(rp_doc, tag_region_param_def_space);
|
|
let space = subst::ParamSpace::from_uint(reader::doc_as_u64(doc) as usize);
|
|
|
|
let doc = reader::get_doc(rp_doc, tag_region_param_def_index);
|
|
let index = reader::doc_as_u64(doc) as u32;
|
|
|
|
let bounds = reader::tagged_docs(rp_doc, tag_items_data_region).map(|p| {
|
|
TyDecoder::with_doc(tcx, cdata.cnum, p,
|
|
&mut |did| translate_def_id(cdata, did))
|
|
.parse_region()
|
|
}).collect();
|
|
|
|
regions.push(space, ty::RegionParameterDef { name: name,
|
|
def_id: def_id,
|
|
space: space,
|
|
index: index,
|
|
bounds: bounds });
|
|
}
|
|
|
|
ty::Generics { types: types, regions: regions }
|
|
}
|
|
|
|
fn doc_predicate<'tcx>(cdata: Cmd,
|
|
doc: rbml::Doc,
|
|
tcx: &ty::ctxt<'tcx>)
|
|
-> ty::Predicate<'tcx>
|
|
{
|
|
let predicate_pos = cdata.xref_index.lookup(
|
|
cdata.data(), reader::doc_as_u32(doc)).unwrap() as usize;
|
|
TyDecoder::new(
|
|
cdata.data(), cdata.cnum, predicate_pos, tcx,
|
|
&mut |did| translate_def_id(cdata, did)
|
|
).parse_predicate()
|
|
}
|
|
|
|
fn doc_predicates<'tcx>(base_doc: rbml::Doc,
|
|
tcx: &ty::ctxt<'tcx>,
|
|
cdata: Cmd,
|
|
tag: usize)
|
|
-> ty::GenericPredicates<'tcx>
|
|
{
|
|
let doc = reader::get_doc(base_doc, tag);
|
|
|
|
let mut predicates = subst::VecPerParamSpace::empty();
|
|
for predicate_doc in reader::tagged_docs(doc, tag_type_predicate) {
|
|
predicates.push(subst::TypeSpace,
|
|
doc_predicate(cdata, predicate_doc, tcx));
|
|
}
|
|
for predicate_doc in reader::tagged_docs(doc, tag_self_predicate) {
|
|
predicates.push(subst::SelfSpace,
|
|
doc_predicate(cdata, predicate_doc, tcx));
|
|
}
|
|
for predicate_doc in reader::tagged_docs(doc, tag_fn_predicate) {
|
|
predicates.push(subst::FnSpace,
|
|
doc_predicate(cdata, predicate_doc, tcx));
|
|
}
|
|
|
|
ty::GenericPredicates { predicates: predicates }
|
|
}
|
|
|
|
pub fn is_defaulted_trait(cdata: Cmd, trait_id: DefIndex) -> bool {
|
|
let trait_doc = cdata.lookup_item(trait_id);
|
|
assert!(item_family(trait_doc) == Family::Trait);
|
|
let defaulted_doc = reader::get_doc(trait_doc, tag_defaulted_trait);
|
|
reader::doc_as_u8(defaulted_doc) != 0
|
|
}
|
|
|
|
pub fn is_default_impl(cdata: Cmd, impl_id: DefIndex) -> bool {
|
|
let impl_doc = cdata.lookup_item(impl_id);
|
|
item_family(impl_doc) == Family::DefaultImpl
|
|
}
|
|
|
|
pub fn get_imported_filemaps(metadata: &[u8]) -> Vec<codemap::FileMap> {
|
|
let crate_doc = rbml::Doc::new(metadata);
|
|
let cm_doc = reader::get_doc(crate_doc, tag_codemap);
|
|
|
|
reader::tagged_docs(cm_doc, tag_codemap_filemap).map(|filemap_doc| {
|
|
let mut decoder = reader::Decoder::new(filemap_doc);
|
|
decoder.read_opaque(|opaque_decoder, _| {
|
|
Decodable::decode(opaque_decoder)
|
|
}).unwrap()
|
|
}).collect()
|
|
}
|
|
|
|
pub fn closure_kind(cdata: Cmd, closure_id: DefIndex) -> ty::ClosureKind {
|
|
let closure_doc = cdata.lookup_item(closure_id);
|
|
let closure_kind_doc = reader::get_doc(closure_doc, tag_items_closure_kind);
|
|
let mut decoder = reader::Decoder::new(closure_kind_doc);
|
|
ty::ClosureKind::decode(&mut decoder).unwrap()
|
|
}
|
|
|
|
pub fn closure_ty<'tcx>(cdata: Cmd, closure_id: DefIndex, tcx: &ty::ctxt<'tcx>)
|
|
-> ty::ClosureTy<'tcx> {
|
|
let closure_doc = cdata.lookup_item(closure_id);
|
|
let closure_ty_doc = reader::get_doc(closure_doc, tag_items_closure_ty);
|
|
TyDecoder::with_doc(tcx, cdata.cnum, closure_ty_doc, &mut |did| translate_def_id(cdata, did))
|
|
.parse_closure_ty()
|
|
}
|
|
|
|
fn def_key(item_doc: rbml::Doc) -> hir_map::DefKey {
|
|
match reader::maybe_get_doc(item_doc, tag_def_key) {
|
|
Some(def_key_doc) => {
|
|
let mut decoder = reader::Decoder::new(def_key_doc);
|
|
hir_map::DefKey::decode(&mut decoder).unwrap()
|
|
}
|
|
None => {
|
|
panic!("failed to find block with tag {:?} for item with family {:?}",
|
|
tag_def_key,
|
|
item_family(item_doc))
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn def_path(cdata: Cmd, id: DefIndex) -> hir_map::DefPath {
|
|
debug!("def_path(id={:?})", id);
|
|
hir_map::definitions::make_def_path(id, |parent| {
|
|
debug!("def_path: parent={:?}", parent);
|
|
let parent_doc = cdata.lookup_item(parent);
|
|
def_key(parent_doc)
|
|
})
|
|
}
|