{"ast_node_type":"other","tokens":[{"end":135,"kind":"keyword","start":0,"text":"//!"}]}
//! See <https://github.com/rust-lang/rust/blob/70b18bc2cbac4712020019f5bf57c00905373205/compiler/rustc_expand/src/mbe/macro_parser.rs>
//!
//! Here is a quick intro to how the parser works, copied from rustc: