AST - Represent the "super" keyword as a VariableExpr

src/ast.rs

@@ -138,7 +138,7 @@ pub struct VariableExpr {
 #[derive(Debug, Clone)]
 pub struct SuperExpr {
     /// The 'super' token itself
-    pub keyword: Token,
+    pub keyword: VariableExpr,
     /// The identifier that contains the method name
     pub method: Token,
 }

src/parser.rs

@@ -753,7 +753,10 @@ impl Parser {
             self.consume(&TokenType::Dot, "expected '.' after 'super'")?;
             let identifier = self.consume_identifier("expected method name")?;
             Ok(ExprNode::Super(SuperExpr {
-                keyword: super_token,
+                keyword: VariableExpr {
+                    token: super_token,
+                    id: self.make_id(),
+                },
                 method: identifier,
             }))
         } else if self.expect(&[TokenType::Fun]).is_some() {