| 1 | // Copyright (c) 2016-2024 Antony Polukhin |
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| 2 | // |
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| 3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
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| 4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | |
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| 6 | #ifndef BOOST_PFR_DETAIL_STDTUPLE_HPP |
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| 7 | #define BOOST_PFR_DETAIL_STDTUPLE_HPP |
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| 8 | #pragma once |
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| 9 | |
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| 10 | #include <boost/pfr/detail/config.hpp> |
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| 11 | |
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| 12 | #include <utility> // metaprogramming stuff |
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| 13 | #include <tuple> |
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| 14 | |
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| 15 | #include <boost/pfr/detail/sequence_tuple.hpp> |
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| 16 | |
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| 17 | namespace boost { namespace pfr { namespace detail { |
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| 18 | |
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| 19 | template <class T, std::size_t... I> |
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| 20 | constexpr auto make_stdtuple_from_tietuple(const T& t, std::index_sequence<I...>) { |
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| 21 | (void)t; // workaround for MSVC 14.1 `warning C4100: 't': unreferenced formal parameter` |
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| 22 | return std::make_tuple( |
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| 23 | boost::pfr::detail::sequence_tuple::get<I>(t)... |
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| 24 | ); |
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| 25 | } |
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| 26 | |
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| 27 | template <class T, std::size_t... I> |
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| 28 | constexpr auto make_stdtiedtuple_from_tietuple(const T& t, std::index_sequence<I...>) noexcept { |
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| 29 | (void)t; // workaround for MSVC 14.1 `warning C4100: 't': unreferenced formal parameter` |
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| 30 | return std::tie( |
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| 31 | boost::pfr::detail::sequence_tuple::get<I>(t)... |
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| 32 | ); |
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| 33 | } |
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| 34 | |
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| 35 | template <class T, std::size_t... I> |
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| 36 | constexpr auto make_conststdtiedtuple_from_tietuple(const T& t, std::index_sequence<I...>) noexcept { |
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| 37 | (void)t; // workaround for MSVC 14.1 `warning C4100: 't': unreferenced formal parameter` |
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| 38 | return std::tuple< |
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| 39 | std::add_lvalue_reference_t<std::add_const_t< |
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| 40 | std::remove_reference_t<decltype(boost::pfr::detail::sequence_tuple::get<I>(t))> |
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| 41 | >>... |
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| 42 | >( |
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| 43 | boost::pfr::detail::sequence_tuple::get<I>(t)... |
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| 44 | ); |
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| 45 | } |
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| 46 | |
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| 47 | }}} // namespace boost::pfr::detail |
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| 48 | |
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| 49 | #endif // BOOST_PFR_DETAIL_STDTUPLE_HPP |
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| 50 | |
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