Function make_default_combining

include/boost/parser/parser.hpp:3851–3855

        }
        template<template<class...> class Tuple, typename... Args>
        constexpr auto make_default_combining(Tuple<Args...>)
        {
            return detail::make_default_combining_impl<0>(
                std::make_integer_sequence<int, sizeof...(Args)>());
        }
        template<typename ParserTuple>
        using default_combining_t = decltype(detail::make_default_combining(
            std::declval<ParserTuple>()));