Rollup merge of #54308 - dsciarra:issue-22692, r=estebank

[rust.git] / src / librustc_resolve / lib.rs

diff --git a/src/librustc_resolve/lib.rs b/src/librustc_resolve/lib.rs
index 0bccf5292d9de349a2c9e537e0edd0d36d39bd5c..15bf837b526b1b2e8fdc436346f2884cbbff5e0c 100644 (file)
--- a/src/librustc_resolve/lib.rs
+++ b/src/librustc_resolve/lib.rs
@@ -13,7 +13,7 @@
        html_root_url = "https://doc.rust-lang.org/nightly/")]
 
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(not(stage0), feature(nll))]
+#![feature(nll)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(slice_sort_by_cached_key)]
 
@@ -1351,7 +1351,6 @@ 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>,
@@ -1667,17 +1666,6 @@ pub fn new(session: &'a Session,
         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)));
@@ -1696,7 +1684,6 @@ pub fn new(session: &'a Session,
             // AST.
             graph_root,
             prelude: None,
-            extern_prelude,
 
             has_self: FxHashSet(),
             field_names: FxHashMap(),
@@ -1968,7 +1955,7 @@ fn resolve_ident_in_lexical_scope(&mut self,
 
         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);
@@ -4006,7 +3993,7 @@ fn lookup_typo_candidate<FilterFn>(&mut self,
                     } 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);
                             }
@@ -4452,8 +4439,7 @@ fn lookup_import_candidates<FilterFn>(&mut self,
         );
 
         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) => {