Override(path) syntax

crates/parser/src/ast/top_level.rs

@@ -91,10 +91,13 @@ pub struct ClassConstructor {
     pub body: Block,
 }
 
+#[derive(Debug, Clone, Serialize)]
+pub struct Override(pub Option<ExprPath>);
+
 #[derive(Debug, Clone, Serialize)]
 pub struct FunctionDecl {
     pub visibility: Visibility,
-    pub is_override: bool,
+    pub is_override: Option<Override>,
     pub name: Identifier,
     pub generics: GenericsDecl,
     pub params: ParamList,