{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"self.parse_expr_assoc_with(Bound::Excluded(prec),"}]}
                self.parse_expr_assoc_with(Bound::Excluded(prec), attrs)
            Some(
                    .map_err(|err| self.maybe_err_dotdotlt_syntax(maybe_lt, err))?