2 files changed, 18 insertions, 0 deletions

diff --git a/src/parser/grammar/items/mod.rs b/src/parser/grammar/items/mod.rs
index 12bcf7924..037cdca53 100644
--- a/src/parser/grammar/items/mod.rs
+++ b/src/parser/grammar/items/mod.rs
@@ -149,6 +149,17 @@ fn item(p: &mut Parser) {
                 }
             }
         }
+        TRAIT_KW => {
+            traits::trait_item(p);
+            TRAIT_ITEM
+        }
+        // test auto_trait
+        // auto trait T {}
+        IDENT if p.at_contextual_kw("auto") && la == TRAIT_KW => {
+            p.bump_remap(AUTO_KW);
+            traits::trait_item(p);
+            TRAIT_ITEM
+        }
         IMPL_KW => {
             traits::impl_item(p);
             IMPL_ITEM
diff --git a/src/parser/grammar/items/traits.rs b/src/parser/grammar/items/traits.rs
index 7d657ced0..60158fe41 100644
--- a/src/parser/grammar/items/traits.rs
+++ b/src/parser/grammar/items/traits.rs
@@ -1,9 +1,16 @@
 use super::*;
 
+// test trait_item
+// trait T<U>: Hash + Clone where U: Copy {}
 pub(super) fn trait_item(p: &mut Parser) {
     assert!(p.at(TRAIT_KW));
     p.bump();
     name(p);
+    type_params::list(p);
+    if p.at(COLON) {
+        type_params::bounds(p);
+    }
+    type_params::where_clause(p);
     p.expect(L_CURLY);
     p.expect(R_CURLY);
 }