dds/external/ranges-v3/include/range/v3/utility/get.hpp

/// \file
// Range v3 library
//
//  Copyright Eric Niebler 2013-present
//
//  Use, modification and distribution is subject to the
//  Boost Software License, Version 1.0. (See accompanying
//  file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)
//
// Project home: https://github.com/ericniebler/range-v3
//

#ifndef RANGES_V3_UTILITY_GET_HPP
#define RANGES_V3_UTILITY_GET_HPP

#include <meta/meta.hpp>

#include <concepts/concepts.hpp>

#include <range/v3/detail/adl_get.hpp>

namespace ranges
{
    /// \addtogroup group-utility Utility
    /// @{
    ///

    /// \cond
    namespace _get_
    {
        /// \endcond
        // clang-format off
        template<std::size_t I, typename TupleLike>
        constexpr auto CPP_auto_fun(get)(TupleLike &&t)
        (
            return detail::adl_get<I>(static_cast<TupleLike &&>(t))
        )
        template<typename T, typename TupleLike>
        constexpr auto CPP_auto_fun(get)(TupleLike &&t)
        (
            return detail::adl_get<T>(static_cast<TupleLike &&>(t))
        )
            // clang-format on

            template<typename T>
            T & get(meta::id_t<T> & value) noexcept
        {
            return value;
        }
        template<typename T>
        T const & get(meta::id_t<T> const & value) noexcept
        {
            return value;
        }
        template<typename T>
        T && get(meta::id_t<T> && value) noexcept
        {
            return static_cast<T &&>(value);
        }
        /// \cond
    } // namespace _get_
    using namespace _get_;
    /// \endcond

    /// @}
} // namespace ranges

#endif