1 files changed, 22 insertions, 3 deletions
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs b/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs
index 2001fb29a..873accafb 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/item_scope.rs
@@ -14,8 +14,9 @@ use stdx::format_to;
 use syntax::ast;
 
 use crate::{
-    db::DefDatabase, per_ns::PerNs, visibility::Visibility, AdtId, BuiltinType, ConstId, HasModule,
-    ImplId, LocalModuleId, MacroId, ModuleDefId, ModuleId, TraitId,
+    db::DefDatabase, per_ns::PerNs, visibility::Visibility, AdtId, BuiltinType, ConstId,
+    ExternCrateId, HasModule, ImplId, LocalModuleId, MacroId, ModuleDefId, ModuleId, TraitId,
+    UseId,
 };
 
 #[derive(Copy, Clone, Debug)]
@@ -50,6 +51,7 @@ pub struct ItemScope {
     unnamed_consts: Vec<ConstId>,
     /// Traits imported via `use Trait as _;`.
     unnamed_trait_imports: FxHashMap<TraitId, Visibility>,
+    extern_crate_decls: Vec<ExternCrateId>,
     /// Macros visible in current module in legacy textual scope
     ///
     /// For macros invoked by an unqualified identifier like `bar!()`, `legacy_macros` will be searched in first.
@@ -112,6 +114,17 @@ impl ItemScope {
         self.declarations.iter().copied()
     }
 
+    pub fn extern_crate_decls(
+        &self,
+    ) -> impl Iterator<Item = ExternCrateId> + ExactSizeIterator + '_ {
+        self.extern_crate_decls.iter().copied()
+    }
+
+    pub fn use_decls(&self) -> impl Iterator<Item = UseId> + ExactSizeIterator + '_ {
+        // FIXME: to be implemented
+        std::iter::empty()
+    }
+
     pub fn impls(&self) -> impl Iterator<Item = ImplId> + ExactSizeIterator + '_ {
         self.impls.iter().copied()
     }
@@ -188,7 +201,11 @@ impl ItemScope {
     }
 
     pub(crate) fn define_impl(&mut self, imp: ImplId) {
-        self.impls.push(imp)
+        self.impls.push(imp);
+    }
+
+    pub(crate) fn define_extern_crate_decl(&mut self, extern_crate: ExternCrateId) {
+        self.extern_crate_decls.push(extern_crate);
     }
 
     pub(crate) fn define_unnamed_const(&mut self, konst: ConstId) {
@@ -397,6 +414,7 @@ impl ItemScope {
             legacy_macros,
             attr_macros,
             derive_macros,
+            extern_crate_decls,
         } = self;
         types.shrink_to_fit();
         values.shrink_to_fit();
@@ -409,6 +427,7 @@ impl ItemScope {
         legacy_macros.shrink_to_fit();
         attr_macros.shrink_to_fit();
         derive_macros.shrink_to_fit();
+        extern_crate_decls.shrink_to_fit();
     }
 }