{"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"Tup(ThinVec<P<Expr>>),"}]}
    Tup(ThinVec<P<Expr>>),
    /// A tuple (e.g., `(a, b, c, d)`).
    /// A binary operation (e.g., `a + b`, `a * b`).