Filename: //usr/include/c++/10//experimental//tuple

// <experimental/tuple> -*- C++ -*- // Copyright (C) 2014-2020 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 #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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