2 files changed, 22 insertions, 9 deletions

diff --git a/crates/ra_hir_def/src/db.rs b/crates/ra_hir_def/src/db.rs
index 40b5920d9..40e68a3c3 100644
--- a/crates/ra_hir_def/src/db.rs
+++ b/crates/ra_hir_def/src/db.rs
@@ -12,26 +12,27 @@ use crate::{
         raw::{ImportSourceMap, RawItems},
         CrateDefMap,
     },
-    DefWithBodyId, EnumId, StructOrUnionId,
+    DefWithBodyId, EnumId, ItemLoc, StructOrUnionId,
 };
 
 #[salsa::query_group(InternDatabaseStorage)]
 pub trait InternDatabase: SourceDatabase {
     #[salsa::interned]
-    fn intern_function(&self, loc: crate::ItemLoc<ast::FnDef>) -> crate::FunctionId;
+    fn intern_function(&self, loc: ItemLoc<ast::FnDef>) -> crate::FunctionId;
     #[salsa::interned]
-    fn intern_struct_or_union(&self, loc: crate::ItemLoc<ast::StructDef>)
-        -> crate::StructOrUnionId;
+    fn intern_struct_or_union(&self, loc: ItemLoc<ast::StructDef>) -> crate::StructOrUnionId;
     #[salsa::interned]
-    fn intern_enum(&self, loc: crate::ItemLoc<ast::EnumDef>) -> crate::EnumId;
+    fn intern_enum(&self, loc: ItemLoc<ast::EnumDef>) -> crate::EnumId;
     #[salsa::interned]
-    fn intern_const(&self, loc: crate::ItemLoc<ast::ConstDef>) -> crate::ConstId;
+    fn intern_const(&self, loc: ItemLoc<ast::ConstDef>) -> crate::ConstId;
     #[salsa::interned]
-    fn intern_static(&self, loc: crate::ItemLoc<ast::StaticDef>) -> crate::StaticId;
+    fn intern_static(&self, loc: ItemLoc<ast::StaticDef>) -> crate::StaticId;
     #[salsa::interned]
-    fn intern_trait(&self, loc: crate::ItemLoc<ast::TraitDef>) -> crate::TraitId;
+    fn intern_trait(&self, loc: ItemLoc<ast::TraitDef>) -> crate::TraitId;
     #[salsa::interned]
-    fn intern_type_alias(&self, loc: crate::ItemLoc<ast::TypeAliasDef>) -> crate::TypeAliasId;
+    fn intern_type_alias(&self, loc: ItemLoc<ast::TypeAliasDef>) -> crate::TypeAliasId;
+    #[salsa::interned]
+    fn intern_impl(&self, loc: ItemLoc<ast::ImplBlock>) -> crate::ImplId;
 }
 
 #[salsa::query_group(DefDatabase2Storage)]
diff --git a/crates/ra_hir_def/src/lib.rs b/crates/ra_hir_def/src/lib.rs
index 3fab7965c..22650db8b 100644
--- a/crates/ra_hir_def/src/lib.rs
+++ b/crates/ra_hir_def/src/lib.rs
@@ -321,6 +321,18 @@ impl AstItemDef<ast::TypeAliasDef> for TypeAliasId {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct ImplId(salsa::InternId);
+impl_intern_key!(ImplId);
+impl AstItemDef<ast::ImplBlock> for ImplId {
+    fn intern(db: &impl InternDatabase, loc: ItemLoc<ast::ImplBlock>) -> Self {
+        db.intern_impl(loc)
+    }
+    fn lookup_intern(self, db: &impl InternDatabase) -> ItemLoc<ast::ImplBlock> {
+        db.lookup_intern_impl(self)
+    }
+}
+
 macro_rules! impl_froms {
     ($e:ident: $($v:ident $(($($sv:ident),*))?),*) => {
         $(