{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"ExprKind::Unary(UnOp::Neg,"}]}
            ExprKind::Unary(UnOp::Neg, ref expr) if let ExprKind::Lit(token_lit) = expr.kind => {
            // We also want to allow negative numeric literals.
                match LitKind::from_token_lit(token_lit) {