{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//!"}]}
//! `$x` are free, which is a correct statement if `$name` is anything but `macro_rules`. But when
//! on particular values of meta-variables. In the following example, we think both instances of
//! `$name` is `macro_rules`, like in the instantiation below, then `$x:tt` is actually a binder of