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rustc_resolve: move extern_prelude from Resolver to Session.

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This commit is contained in:
Eduard-Mihai Burtescu 2018-09-28 22:17:59 +03:00
parent 80e6e3e582
commit e90985acde
4 changed files with 25 additions and 22 deletions
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19
src/librustc/session/mod.rs
View File

@ -38,7 +38,7 @@ use syntax::parse;
use syntax::parse::ParseSess;
use syntax::{ast, source_map};
use syntax::feature_gate::AttributeType;
use syntax_pos::{MultiSpan, Span};
use syntax_pos::{MultiSpan, Span, symbol::Symbol};
use util::profiling::SelfProfiler;
use rustc_target::spec::PanicStrategy;
@ -168,6 +168,10 @@ pub struct Session {
/// Cap lint level specified by a driver specifically.
pub driver_lint_caps: FxHashMap<lint::LintId, lint::Level>,
/// All the crate names specified with `--extern`, and the builtin ones.
/// Starting with the Rust 2018 edition, absolute paths resolve in this set.
pub extern_prelude: FxHashSet<Symbol>,
}
pub struct PerfStats {
@ -1126,6 +1130,18 @@ pub fn build_session_(
CguReuseTracker::new_disabled()
};
let mut extern_prelude: FxHashSet<Symbol> =
sopts.externs.iter().map(|kv| Symbol::intern(kv.0)).collect();
// HACK(eddyb) this ignores the `no_{core,std}` attributes.
// FIXME(eddyb) warn (somewhere) if core/std is used with `no_{core,std}`.
// if !attr::contains_name(&krate.attrs, "no_core") {
// if !attr::contains_name(&krate.attrs, "no_std") {
extern_prelude.insert(Symbol::intern("core"));
extern_prelude.insert(Symbol::intern("std"));
extern_prelude.insert(Symbol::intern("meta"));
let sess = Session {
target: target_cfg,
host,
@ -1201,6 +1217,7 @@ pub fn build_session_(
has_global_allocator: Once::new(),
has_panic_handler: Once::new(),
driver_lint_caps: FxHashMap(),
extern_prelude,
};
validate_commandline_args_with_session_available(&sess);

20
src/librustc_resolve/lib.rs
View File

@ -1350,7 +1350,6 @@ pub struct Resolver<'a, 'b: 'a> {
graph_root: Module<'a>,
prelude: Option<Module<'a>>,
extern_prelude: FxHashSet<Name>,
/// n.b. This is used only for better diagnostics, not name resolution itself.
has_self: FxHashSet<DefId>,
@ -1663,17 +1662,6 @@ impl<'a, 'crateloader: 'a> Resolver<'a, 'crateloader> {
DefCollector::new(&mut definitions, Mark::root())
.collect_root(crate_name, session.local_crate_disambiguator());
let mut extern_prelude: FxHashSet<Name> =
session.opts.externs.iter().map(|kv| Symbol::intern(kv.0)).collect();
// HACK(eddyb) this ignore the `no_{core,std}` attributes.
// FIXME(eddyb) warn (elsewhere) if core/std is used with `no_{core,std}`.
// if !attr::contains_name(&krate.attrs, "no_core") {
// if !attr::contains_name(&krate.attrs, "no_std") {
extern_prelude.insert(Symbol::intern("core"));
extern_prelude.insert(Symbol::intern("std"));
extern_prelude.insert(Symbol::intern("meta"));
let mut invocations = FxHashMap();
invocations.insert(Mark::root(),
arenas.alloc_invocation_data(InvocationData::root(graph_root)));
@ -1692,7 +1680,6 @@ impl<'a, 'crateloader: 'a> Resolver<'a, 'crateloader> {
// AST.
graph_root,
prelude: None,
extern_prelude,
has_self: FxHashSet(),
field_names: FxHashMap(),
@ -1963,7 +1950,7 @@ impl<'a, 'crateloader: 'a> Resolver<'a, 'crateloader> {
if !module.no_implicit_prelude {
// `record_used` means that we don't try to load crates during speculative resolution
if record_used && ns == TypeNS && self.extern_prelude.contains(&ident.name) {
if record_used && ns == TypeNS && self.session.extern_prelude.contains(&ident.name) {
let crate_id = self.crate_loader.process_path_extern(ident.name, ident.span);
let crate_root = self.get_module(DefId { krate: crate_id, index: CRATE_DEF_INDEX });
self.populate_module_if_necessary(&crate_root);
@ -3955,7 +3942,7 @@ impl<'a, 'crateloader: 'a> Resolver<'a, 'crateloader> {
} else {
// Items from the prelude
if !module.no_implicit_prelude {
names.extend(self.extern_prelude.iter().cloned());
names.extend(self.session.extern_prelude.iter().cloned());
if let Some(prelude) = self.prelude {
add_module_candidates(prelude, &mut names);
}
@ -4401,8 +4388,7 @@ impl<'a, 'crateloader: 'a> Resolver<'a, 'crateloader> {
);
if self.session.rust_2018() {
let extern_prelude_names = self.extern_prelude.clone();
for &name in extern_prelude_names.iter() {
for &name in &self.session.extern_prelude {
let ident = Ident::with_empty_ctxt(name);
match self.crate_loader.maybe_process_path_extern(name, ident.span) {
Some(crate_id) => {

2
src/librustc_resolve/macros.rs
View File

@ -682,7 +682,7 @@ impl<'a, 'cl> Resolver<'a, 'cl> {
result
}
WhereToResolve::ExternPrelude => {
if use_prelude && self.extern_prelude.contains(&ident.name) {
if use_prelude && self.session.extern_prelude.contains(&ident.name) {
let crate_id =
self.crate_loader.process_path_extern(ident.name, ident.span);
let crate_root =

6
src/librustc_resolve/resolve_imports.rs
View File

@ -199,7 +199,7 @@ impl<'a, 'crateloader> Resolver<'a, 'crateloader> {
if !(
ns == TypeNS &&
!ident.is_path_segment_keyword() &&
self.extern_prelude.contains(&ident.name)
self.session.extern_prelude.contains(&ident.name)
) {
// ... unless the crate name is not in the `extern_prelude`.
return binding;
@ -218,7 +218,7 @@ impl<'a, 'crateloader> Resolver<'a, 'crateloader> {
} else if
ns == TypeNS &&
!ident.is_path_segment_keyword() &&
self.extern_prelude.contains(&ident.name)
self.session.extern_prelude.contains(&ident.name)
{
let crate_id =
self.crate_loader.process_path_extern(ident.name, ident.span);
@ -735,7 +735,7 @@ impl<'a, 'b:'a, 'c: 'b> ImportResolver<'a, 'b, 'c> {
let uniform_paths_feature = self.session.features_untracked().uniform_paths;
for ((span, _, ns), results) in uniform_paths_canaries {
let name = results.name;
let external_crate = if ns == TypeNS && self.extern_prelude.contains(&name) {
let external_crate = if ns == TypeNS && self.session.extern_prelude.contains(&name) {
let crate_id =
self.crate_loader.process_path_extern(name, span);
Some(Def::Mod(DefId { krate: crate_id, index: CRATE_DEF_INDEX }))