| // <experimental/tuple> -*- C++ -*- |
| |
| // Copyright (C) 2014-2015 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. |
| */ |
| |
| #ifndef _GLIBCXX_EXPERIMENTAL_TUPLE |
| #define _GLIBCXX_EXPERIMENTAL_TUPLE 1 |
| |
| #pragma GCC system_header |
| |
| #if __cplusplus <= 201103L |
| # include <bits/c++14_warning.h> |
| #else |
| |
| #include <tuple> |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| namespace experimental |
| { |
| inline namespace fundamentals_v1 |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| // See C++14 ยง20.4.2.5, 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::forward<_Fn>(f)(get<_Idx>(forward<_Tuple>(t))...); } |
| |
| template <typename _Fn, typename _Tuple> |
| constexpr decltype(auto) |
| apply(_Fn&& f, _Tuple&& t) |
| { |
| using _Indices = |
| std::make_index_sequence<std::tuple_size<std::decay_t<_Tuple>>::value>; |
| return __apply_impl(std::forward<_Fn>(f), std::forward<_Tuple>(t), |
| _Indices{}); |
| } |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace fundamentals_v1 |
| } // namespace experimental |
| } // namespace std |
| |
| #endif // C++14 |
| |
| #endif // _GLIBCXX_EXPERIMENTAL_TUPLE |