libstdc++
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00001 // <experimental/tuple> -*- C++ -*- 00002 00003 // Copyright (C) 2014-2015 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file experimental/tuple 00026 * This is a TS C++ Library header. 00027 */ 00028 00029 #ifndef _GLIBCXX_EXPERIMENTAL_TUPLE 00030 #define _GLIBCXX_EXPERIMENTAL_TUPLE 1 00031 00032 #pragma GCC system_header 00033 00034 #if __cplusplus <= 201103L 00035 # include <bits/c++14_warning.h> 00036 #else 00037 00038 #include <tuple> 00039 00040 namespace std _GLIBCXX_VISIBILITY(default) 00041 { 00042 namespace experimental 00043 { 00044 inline namespace fundamentals_v1 00045 { 00046 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00047 00048 // See C++14 ยง20.4.2.5, tuple helper classes 00049 template <typename _Tp> 00050 constexpr size_t tuple_size_v = tuple_size<_Tp>::value; 00051 00052 #define __cpp_lib_experimental_tuple 201402 00053 00054 template <typename _Fn, typename _Tuple, std::size_t... _Idx> 00055 constexpr decltype(auto) 00056 __apply_impl(_Fn&& f, _Tuple&& t, std::index_sequence<_Idx...>) 00057 { 00058 return std::forward<_Fn>(f)(std::get<_Idx>(std::forward<_Tuple>(t))...); 00059 } 00060 00061 template <typename _Fn, typename _Tuple> 00062 constexpr decltype(auto) 00063 apply(_Fn&& f, _Tuple&& t) 00064 { 00065 using _Indices = 00066 std::make_index_sequence<std::tuple_size<std::decay_t<_Tuple>>::value>; 00067 return __apply_impl(std::forward<_Fn>(f), std::forward<_Tuple>(t), 00068 _Indices{}); 00069 } 00070 00071 _GLIBCXX_END_NAMESPACE_VERSION 00072 } // namespace fundamentals_v1 00073 } // namespace experimental 00074 } // namespace std 00075 00076 #endif // C++14 00077 00078 #endif // _GLIBCXX_EXPERIMENTAL_TUPLE