Function operator()

include/boost/parser/parser.hpp:5976–5981

            `parser_((Arg &&)arg, (Args &&)args...)` is well-formed. */
        template<typename Arg, typename... Args>
        constexpr auto operator()(Arg && arg, Args &&... args) const noexcept
            -> decltype(std::declval<parser_type const &>()(
                (Arg &&) arg, (Args &&) args...))
        {
            return parser_((Arg &&) arg, (Args &&) args...);
        }

#ifndef BOOST_PARSER_DOXYGEN