{"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"debug_assert_eq!(self.token,"}]}
        debug_assert_eq!(self.token, token::At);
    fn report_misplaced_at_in_struct_pat(&self, prev_field: Ident) -> Diag<'a> {
        let span = prev_field.span.to(self.token.span);