{"ast_node_type":"other","tokens":[{"end":119,"kind":"keyword","start":0,"text":"//"}]}
            // [1]: https://github.com/rust-lang/rust/blob/f0c4da499/compiler/rustc_expand/src/mbe/macro_parser.rs#L576
            // [0]: https://github.com/rust-lang/rust/issues/86730
            match input.peek() {