1 // <utility> -*- C++ -*- 2 3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 4 // Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the 8 // terms of the GNU General Public License as published by the 9 // Free Software Foundation; either version 3, or (at your option) 10 // any later version. 11 12 // This library is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 17 // Under Section 7 of GPL version 3, you are granted additional 18 // permissions described in the GCC Runtime Library Exception, version 19 // 3.1, as published by the Free Software Foundation. 20 21 // You should have received a copy of the GNU General Public License and 22 // a copy of the GCC Runtime Library Exception along with this program; 23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 // <http://www.gnu.org/licenses/>. 25 26 /* 27 * 28 * Copyright (c) 1994 29 * Hewlett-Packard Company 30 * 31 * Permission to use, copy, modify, distribute and sell this software 32 * and its documentation for any purpose is hereby granted without fee, 33 * provided that the above copyright notice appear in all copies and 34 * that both that copyright notice and this permission notice appear 35 * in supporting documentation. Hewlett-Packard Company makes no 36 * representations about the suitability of this software for any 37 * purpose. It is provided "as is" without express or implied warranty. 38 * 39 * 40 * Copyright (c) 1996,1997 41 * Silicon Graphics Computer Systems, Inc. 42 * 43 * Permission to use, copy, modify, distribute and sell this software 44 * and its documentation for any purpose is hereby granted without fee, 45 * provided that the above copyright notice appear in all copies and 46 * that both that copyright notice and this permission notice appear 47 * in supporting documentation. Silicon Graphics makes no 48 * representations about the suitability of this software for any 49 * purpose. It is provided "as is" without express or implied warranty. 50 */ 51 52 /** @file include/utility 53 * This is a Standard C++ Library header. 54 */ 55 56 #ifndef _GLIBCXX_UTILITY 57 #define _GLIBCXX_UTILITY 1 58 59 #pragma GCC system_header 60 61 /** 62 * @defgroup utilities Utilities 63 * 64 * Components deemed generally useful. Includes pair, tuple, 65 * forward/move helpers, ratio, function object, metaprogramming and 66 * type traits, time, date, and memory functions. 67 */ 68 69 #include <bits/c++config.h> 70 #include <bits/stl_relops.h> 71 #include <bits/stl_pair.h> 72 73 #ifdef __GXX_EXPERIMENTAL_CXX0X__ 74 #include <bits/move.h> 75 #include <initializer_list> 76 77 namespace std _GLIBCXX_VISIBILITY(default) 78 { 79 _GLIBCXX_BEGIN_NAMESPACE_VERSION 80 81 template<class _Tp> 82 class tuple_size; 83 84 template<std::size_t _Int, class _Tp> 85 class tuple_element; 86 87 // Various functions which give std::pair a tuple-like interface. 88 template<class _Tp1, class _Tp2> 89 struct tuple_size<std::pair<_Tp1, _Tp2> > 90 { static const std::size_t value = 2; }; 91 92 template<class _Tp1, class _Tp2> 93 const std::size_t 94 tuple_size<std::pair<_Tp1, _Tp2> >::value; 95 96 template<class _Tp1, class _Tp2> 97 struct tuple_element<0, std::pair<_Tp1, _Tp2> > 98 { typedef _Tp1 type; }; 99 100 template<class _Tp1, class _Tp2> 101 struct tuple_element<1, std::pair<_Tp1, _Tp2> > 102 { typedef _Tp2 type; }; 103 104 template<std::size_t _Int> 105 struct __pair_get; 106 107 template<> 108 struct __pair_get<0> 109 { 110 template<typename _Tp1, typename _Tp2> 111 static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair) 112 { return __pair.first; } 113 114 template<typename _Tp1, typename _Tp2> 115 static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair) 116 { return __pair.first; } 117 }; 118 119 template<> 120 struct __pair_get<1> 121 { 122 template<typename _Tp1, typename _Tp2> 123 static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair) 124 { return __pair.second; } 125 126 template<typename _Tp1, typename _Tp2> 127 static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair) 128 { return __pair.second; } 129 }; 130 131 template<std::size_t _Int, class _Tp1, class _Tp2> 132 inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& 133 get(std::pair<_Tp1, _Tp2>& __in) 134 { return __pair_get<_Int>::__get(__in); } 135 136 template<std::size_t _Int, class _Tp1, class _Tp2> 137 inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& 138 get(const std::pair<_Tp1, _Tp2>& __in) 139 { return __pair_get<_Int>::__const_get(__in); } 140 141 _GLIBCXX_END_NAMESPACE_VERSION 142 } // namespace 143 144 #endif 145 146 #endif /* _GLIBCXX_UTILITY */ 147
