libstdc++
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00001 // <utility> -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 00004 // Free Software Foundation, Inc. 00005 // 00006 // This file is part of the GNU ISO C++ Library. This library is free 00007 // software; you can redistribute it and/or modify it under the 00008 // terms of the GNU General Public License as published by the 00009 // Free Software Foundation; either version 3, or (at your option) 00010 // any later version. 00011 00012 // This library is distributed in the hope that it will be useful, 00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 // GNU General Public License for more details. 00016 00017 // Under Section 7 of GPL version 3, you are granted additional 00018 // permissions described in the GCC Runtime Library Exception, version 00019 // 3.1, as published by the Free Software Foundation. 00020 00021 // You should have received a copy of the GNU General Public License and 00022 // a copy of the GCC Runtime Library Exception along with this program; 00023 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00024 // <http://www.gnu.org/licenses/>. 00025 00026 /* 00027 * 00028 * Copyright (c) 1994 00029 * Hewlett-Packard Company 00030 * 00031 * Permission to use, copy, modify, distribute and sell this software 00032 * and its documentation for any purpose is hereby granted without fee, 00033 * provided that the above copyright notice appear in all copies and 00034 * that both that copyright notice and this permission notice appear 00035 * in supporting documentation. Hewlett-Packard Company makes no 00036 * representations about the suitability of this software for any 00037 * purpose. It is provided "as is" without express or implied warranty. 00038 * 00039 * 00040 * Copyright (c) 1996,1997 00041 * Silicon Graphics Computer Systems, Inc. 00042 * 00043 * Permission to use, copy, modify, distribute and sell this software 00044 * and its documentation for any purpose is hereby granted without fee, 00045 * provided that the above copyright notice appear in all copies and 00046 * that both that copyright notice and this permission notice appear 00047 * in supporting documentation. Silicon Graphics makes no 00048 * representations about the suitability of this software for any 00049 * purpose. It is provided "as is" without express or implied warranty. 00050 */ 00051 00052 /** @file include/utility 00053 * This is a Standard C++ Library header. 00054 */ 00055 00056 #ifndef _GLIBCXX_UTILITY 00057 #define _GLIBCXX_UTILITY 1 00058 00059 #pragma GCC system_header 00060 00061 /** 00062 * @defgroup utilities Utilities 00063 * 00064 * Components deemed generally useful. Includes pair, tuple, 00065 * forward/move helpers, ratio, function object, metaprogramming and 00066 * type traits, time, date, and memory functions. 00067 */ 00068 00069 #include <bits/c++config.h> 00070 #include <bits/stl_relops.h> 00071 #include <bits/stl_pair.h> 00072 00073 #ifdef __GXX_EXPERIMENTAL_CXX0X__ 00074 #include <bits/move.h> 00075 #include <initializer_list> 00076 00077 namespace std _GLIBCXX_VISIBILITY(default) 00078 { 00079 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00080 00081 template<class _Tp> 00082 class tuple_size; 00083 00084 template<std::size_t _Int, class _Tp> 00085 class tuple_element; 00086 00087 // Various functions which give std::pair a tuple-like interface. 00088 template<class _Tp1, class _Tp2> 00089 struct tuple_size<std::pair<_Tp1, _Tp2> > 00090 { static const std::size_t value = 2; }; 00091 00092 template<class _Tp1, class _Tp2> 00093 const std::size_t 00094 tuple_size<std::pair<_Tp1, _Tp2> >::value; 00095 00096 template<class _Tp1, class _Tp2> 00097 struct tuple_element<0, std::pair<_Tp1, _Tp2> > 00098 { typedef _Tp1 type; }; 00099 00100 template<class _Tp1, class _Tp2> 00101 struct tuple_element<1, std::pair<_Tp1, _Tp2> > 00102 { typedef _Tp2 type; }; 00103 00104 template<std::size_t _Int> 00105 struct __pair_get; 00106 00107 template<> 00108 struct __pair_get<0> 00109 { 00110 template<typename _Tp1, typename _Tp2> 00111 static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair) 00112 { return __pair.first; } 00113 00114 template<typename _Tp1, typename _Tp2> 00115 static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair) 00116 { return __pair.first; } 00117 }; 00118 00119 template<> 00120 struct __pair_get<1> 00121 { 00122 template<typename _Tp1, typename _Tp2> 00123 static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair) 00124 { return __pair.second; } 00125 00126 template<typename _Tp1, typename _Tp2> 00127 static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair) 00128 { return __pair.second; } 00129 }; 00130 00131 template<std::size_t _Int, class _Tp1, class _Tp2> 00132 inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& 00133 get(std::pair<_Tp1, _Tp2>& __in) 00134 { return __pair_get<_Int>::__get(__in); } 00135 00136 template<std::size_t _Int, class _Tp1, class _Tp2> 00137 inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& 00138 get(const std::pair<_Tp1, _Tp2>& __in) 00139 { return __pair_get<_Int>::__const_get(__in); } 00140 00141 _GLIBCXX_END_NAMESPACE_VERSION 00142 } // namespace 00143 00144 #endif 00145 00146 #endif /* _GLIBCXX_UTILITY */