Extract ast TraitImplHeader

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -954,13 +954,16 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
         }
 
         match &item.kind {
-            ItemKind::Impl(box Impl {
-                safety,
-                polarity,
-                defaultness: _,
-                constness,
+            ItemKind::Impl(Impl {
                 generics,
-                of_trait: Some(t),
+                of_trait:
+                    Some(box TraitImplHeader {
+                        safety,
+                        polarity,
+                        defaultness: _,
+                        constness,
+                        trait_ref: t,
+                    }),
                 self_ty,
                 items,
             }) => {
@@ -992,16 +995,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                     walk_list!(this, visit_assoc_item, items, AssocCtxt::Impl { of_trait: true });
                 });
             }
-            ItemKind::Impl(box Impl {
-                safety: _,
-                polarity: _,
-                defaultness: _,
-                constness: _,
-                generics,
-                of_trait: None,
-                self_ty,
-                items,
-            }) => {
+            ItemKind::Impl(Impl { generics, of_trait: None, self_ty, items }) => {
                 self.visit_attrs_vis(&item.attrs, &item.vis);
                 self.visibility_not_permitted(
                     &item.vis,