{"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"#[allow(unused_parens)]"}]}
        #[allow(unused_parens)]
    ($fx:expr, $args:expr => ($($arg:tt),*); $intrinsic:expr) => {
        let ($($arg),*) = if let [$($arg),*] = $args {