overload_resolution.hpp

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#ifndef BOOST_MPL11_DETAIL_AT_INDEX_OVERLOAD_RESOLUTION_HPP
#define BOOST_MPL11_DETAIL_AT_INDEX_OVERLOAD_RESOLUTION_HPP

#include <boost/mpl11/detail/std_index_sequence.hpp>
#include <boost/mpl11/detail/std_size_t.hpp>


namespace boost { namespace mpl11 { namespace detail { namespace at_index {
    template <typename ignore>
    struct overload_impl;

    template <std_size_t ...ignore>
    struct overload_impl<std_index_sequence<ignore...>> {
        template <typename nth>
        static nth apply(decltype(ignore, (void*)nullptr)..., nth*, ...);
    };

    template <std_size_t index, typename ...xs>
    using overload_resolution = decltype(
        overload_impl<typename make_std_index_sequence<index>::type>::apply(
            (xs*)nullptr...
        )
    );
}}}} // end namespace boost::mpl11::detail::at_index

#endif // !BOOST_MPL11_DETAIL_AT_INDEX_OVERLOAD_RESOLUTION_HPP