Make completion work too

Author: Jonas Schievink

crates/ide-completion/src/completions/type.rs

@@ -168,8 +168,9 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
                     if let Some(hir::PathResolution::Def(hir::ModuleDef::Trait(trait_))) =
                         ctx.sema.resolve_path(&path_seg.parent_path())
                     {
-                        trait_.items(ctx.sema.db).into_iter().for_each(|it| {
+                        trait_.items_with_supertraits(ctx.sema.db).into_iter().for_each(|it| {
                             if let hir::AssocItem::TypeAlias(alias) = it {
+                                cov_mark::hit!(complete_assoc_type_in_generics_list);
                                 acc.add_type_alias_with_eq(ctx, alias)
                             }
                         });

crates/ide-completion/src/tests/type_pos.rs

@@ -336,9 +336,13 @@ fn foo<'lt, T, const C: usize>() {
 
 #[test]
 fn completes_types_and_const_in_arg_list() {
+    cov_mark::check!(complete_assoc_type_in_generics_list);
     check(
         r#"
-trait Trait2 {
+trait Trait1 {
+    type Super;
+}
+trait Trait2: Trait1 {
     type Foo;
 }
 
@@ -348,14 +352,16 @@ fn foo<'lt, T: Trait2<$0>, const CONST_PARAM: usize>(_: T) {}
             ct CONST
             cp CONST_PARAM
             en Enum
-            ma makro!(…)          macro_rules! makro
+            ma makro!(…)            macro_rules! makro
             md module
             st Record
             st Tuple
             st Unit
             tt Trait
+            tt Trait1
             tt Trait2
-            ta Foo =  (as Trait2) type Foo
+            ta Foo =  (as Trait2)   type Foo
+            ta Super =  (as Trait1) type Super
             tp T
             un Union
             bt u32