{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"impl<S:"}]}
impl<S: Stage> SingleAttributeParser<S> for RustcBuiltinMacroParser {
pub(crate) struct RustcBuiltinMacroParser;
    const PATH: &[Symbol] = &[sym::rustc_builtin_macro];