4 files changed, 12 insertions, 6 deletions

diff --git a/crates/ra_hir_def/src/child_by_source.rs b/crates/ra_hir_def/src/child_by_source.rs
index 403ba8b57..4488e8502 100644
--- a/crates/ra_hir_def/src/child_by_source.rs
+++ b/crates/ra_hir_def/src/child_by_source.rs
@@ -80,9 +80,9 @@ impl ChildBySource for ModuleId {
 
         module_data.scope.declarations().for_each(|item| add_module_def(db, &mut res, item));
 
-        for &impl_ in module_data.scope.impls.iter() {
-            let src = impl_.lookup(db).source(db);
-            res[keys::IMPL].insert(src, impl_)
+        for imp in module_data.scope.impls() {
+            let src = imp.lookup(db).source(db);
+            res[keys::IMPL].insert(src, imp)
         }
 
         res
diff --git a/crates/ra_hir_def/src/item_scope.rs b/crates/ra_hir_def/src/item_scope.rs
index ac56986cd..f51e97ef9 100644
--- a/crates/ra_hir_def/src/item_scope.rs
+++ b/crates/ra_hir_def/src/item_scope.rs
@@ -10,7 +10,7 @@ use crate::{per_ns::PerNs, BuiltinType, ImplId, LocalImportId, MacroDefId, Modul
 #[derive(Debug, Default, PartialEq, Eq)]
 pub struct ItemScope {
     items: FxHashMap<Name, Resolution>,
-    pub(crate) impls: Vec<ImplId>,
+    impls: Vec<ImplId>,
     /// 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.
@@ -104,6 +104,10 @@ impl ItemScope {
         self.legacy_macros.get(name).copied()
     }
 
+    pub(crate) fn define_impl(&mut self, imp: ImplId) {
+        self.impls.push(imp)
+    }
+
     pub(crate) fn push_res(
         &mut self,
         name: Name,
diff --git a/crates/ra_hir_def/src/lang_item.rs b/crates/ra_hir_def/src/lang_item.rs
index 61b248815..cef061837 100644
--- a/crates/ra_hir_def/src/lang_item.rs
+++ b/crates/ra_hir_def/src/lang_item.rs
@@ -81,7 +81,7 @@ impl LangItems {
         // Look for impl targets
         let def_map = db.crate_def_map(module.krate);
         let module_data = &def_map[module.local_id];
-        for &impl_block in module_data.scope.impls.iter() {
+        for impl_block in module_data.scope.impls() {
             self.collect_lang_item(db, impl_block, LangItemTarget::ImplBlockId)
         }
 
diff --git a/crates/ra_hir_def/src/nameres/collector.rs b/crates/ra_hir_def/src/nameres/collector.rs
index d62fae8a6..b064ccc9c 100644
--- a/crates/ra_hir_def/src/nameres/collector.rs
+++ b/crates/ra_hir_def/src/nameres/collector.rs
@@ -635,7 +635,9 @@ where
                         let impl_id =
                             ImplLoc { container, ast_id: AstId::new(self.file_id, ast_id) }
                                 .intern(self.def_collector.db);
-                        self.def_collector.def_map.modules[self.module_id].scope.impls.push(impl_id)
+                        self.def_collector.def_map.modules[self.module_id]
+                            .scope
+                            .define_impl(impl_id)
                     }
                 }
             }