1 files changed, 4 insertions, 4 deletions

diff --git a/crates/libsyntax2/src/grammar/items/traits.rs b/crates/libsyntax2/src/grammar/items/traits.rs
index daecaff5c..73ecd4bef 100644
--- a/crates/libsyntax2/src/grammar/items/traits.rs
+++ b/crates/libsyntax2/src/grammar/items/traits.rs
@@ -6,11 +6,11 @@ pub(super) fn trait_def(p: &mut Parser) {
     assert!(p.at(TRAIT_KW));
     p.bump();
     name(p);
-    type_params::type_param_list(p);
+    type_params::opt_type_param_list(p);
     if p.at(COLON) {
         type_params::bounds(p);
     }
-    type_params::where_clause(p);
+    type_params::opt_where_clause(p);
     p.expect(L_CURLY);
     // test trait_item_items
     // impl F {
@@ -31,7 +31,7 @@ pub(super) fn impl_item(p: &mut Parser) {
     assert!(p.at(IMPL_KW));
     p.bump();
     if choose_type_params_over_qpath(p) {
-        type_params::type_param_list(p);
+        type_params::opt_type_param_list(p);
     }
 
     // TODO: never type
@@ -44,7 +44,7 @@ pub(super) fn impl_item(p: &mut Parser) {
     if p.eat(FOR_KW) {
         types::type_(p);
     }
-    type_params::where_clause(p);
+    type_params::opt_where_clause(p);
     p.expect(L_CURLY);
 
     // test impl_item_items