{"ast_node_type":"other","tokens":[{"end":107,"kind":"keyword","start":0,"text":"#[rustc_const_panic_str]"}]}
            #[rustc_const_panic_str] // enforce a &&str argument in const-check and hook this by const-eval
        ("{}", $arg:expr $(,)?) => ({
            #[rustc_do_not_const_check] // hooked by const-eval