Edit File: utility
// <utility> -*- C++ -*- // Copyright (C) 2001-2013 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/>. /* * * Copyright (c) 1994 * Hewlett-Packard Company * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Hewlett-Packard Company makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. * * * Copyright (c) 1996,1997 * Silicon Graphics Computer Systems, Inc. * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Silicon Graphics makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. */ /** @file include/utility * This is a Standard C++ Library header. */ #ifndef _GLIBCXX_UTILITY #define _GLIBCXX_UTILITY 1 #pragma GCC system_header /** * @defgroup utilities Utilities * * Components deemed generally useful. Includes pair, tuple, * forward/move helpers, ratio, function object, metaprogramming and * type traits, time, date, and memory functions. */ #include <bits/c++config.h> #include <bits/stl_relops.h> #include <bits/stl_pair.h> #if __cplusplus >= 201103L #include <bits/move.h> #include <initializer_list> namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION template<class _Tp> class tuple_size; template<std::size_t _Int, class _Tp> class tuple_element; // Various functions which give std::pair a tuple-like interface. template<class _Tp1, class _Tp2> struct tuple_size<std::pair<_Tp1, _Tp2>> : public integral_constant<std::size_t, 2> { }; template<class _Tp1, class _Tp2> struct tuple_element<0, std::pair<_Tp1, _Tp2>> { typedef _Tp1 type; }; template<class _Tp1, class _Tp2> struct tuple_element<1, std::pair<_Tp1, _Tp2>> { typedef _Tp2 type; }; template<std::size_t _Int> struct __pair_get; template<> struct __pair_get<0> { template<typename _Tp1, typename _Tp2> static constexpr _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair) noexcept { return __pair.first; } template<typename _Tp1, typename _Tp2> static constexpr _Tp1&& __move_get(std::pair<_Tp1, _Tp2>&& __pair) noexcept { return std::forward<_Tp1>(__pair.first); } template<typename _Tp1, typename _Tp2> static constexpr const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair) noexcept { return __pair.first; } }; template<> struct __pair_get<1> { template<typename _Tp1, typename _Tp2> static constexpr _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair) noexcept { return __pair.second; } template<typename _Tp1, typename _Tp2> static constexpr _Tp2&& __move_get(std::pair<_Tp1, _Tp2>&& __pair) noexcept { return std::forward<_Tp2>(__pair.second); } template<typename _Tp1, typename _Tp2> static constexpr const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair) noexcept { return __pair.second; } }; template<std::size_t _Int, class _Tp1, class _Tp2> constexpr typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type& get(std::pair<_Tp1, _Tp2>& __in) noexcept { return __pair_get<_Int>::__get(__in); } template<std::size_t _Int, class _Tp1, class _Tp2> constexpr typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&& get(std::pair<_Tp1, _Tp2>&& __in) noexcept { return __pair_get<_Int>::__move_get(std::move(__in)); } template<std::size_t _Int, class _Tp1, class _Tp2> constexpr const typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type& get(const std::pair<_Tp1, _Tp2>& __in) noexcept { return __pair_get<_Int>::__const_get(__in); } _GLIBCXX_END_NAMESPACE_VERSION } // namespace #endif #endif /* _GLIBCXX_UTILITY */