{"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":")"}]}
    ) -> PResult<'a, P<Expr>> {
        expr_kind: fn(P<Expr>, P<Ty>) -> ExprKind,
        let mk_expr = |this: &mut Self, lhs: P<Expr>, rhs: P<Ty>| {