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// <experimental/tuple> -*- C++ -*-
// Copyright (C) 2014-2022 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file experimental/tuple
* This is a TS C++ Library header.
* @ingroup libfund-ts
*/
#ifndef _GLIBCXX_EXPERIMENTAL_TUPLE
#define _GLIBCXX_EXPERIMENTAL_TUPLE 1
#pragma GCC system_header
#include <bits/requires_hosted.h> // experimental is currently omitted
#if __cplusplus >= 201402L
#include <tuple>
#include <bits/invoke.h>
#include <experimental/bits/lfts_config.h>
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace experimental
{
inline namespace fundamentals_v1
{
// See C++14 20.4.2.5, tuple helper classes
template <typename _Tp>
constexpr size_t tuple_size_v = tuple_size<_Tp>::value;
#define __cpp_lib_experimental_tuple 201402
template <typename _Fn, typename _Tuple, std::size_t... _Idx>
constexpr decltype(auto)
__apply_impl(_Fn&& __f, _Tuple&& __t, std::index_sequence<_Idx...>)
{
return std::__invoke(std::forward<_Fn>(__f),
std::get<_Idx>(std::forward<_Tuple>(__t))...);
}
template <typename _Fn, typename _Tuple>
constexpr decltype(auto)
apply(_Fn&& __f, _Tuple&& __t)
{
using _Indices =
std::make_index_sequence<tuple_size_v<std::decay_t<_Tuple>>>;
return experimental::__apply_impl(std::forward<_Fn>(__f),
std::forward<_Tuple>(__t),
_Indices{});
}
} // namespace fundamentals_v1
} // namespace experimental
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++14
#endif // _GLIBCXX_EXPERIMENTAL_TUPLE
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