00001 // Pair implementation -*- C++ -*-
00002
00003 // Copyright (C) 2001 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 2, 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 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING. If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction. Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License. This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029
00030 /*
00031 *
00032 * Copyright (c) 1994
00033 * Hewlett-Packard Company
00034 *
00035 * Permission to use, copy, modify, distribute and sell this software
00036 * and its documentation for any purpose is hereby granted without fee,
00037 * provided that the above copyright notice appear in all copies and
00038 * that both that copyright notice and this permission notice appear
00039 * in supporting documentation. Hewlett-Packard Company makes no
00040 * representations about the suitability of this software for any
00041 * purpose. It is provided "as is" without express or implied warranty.
00042 *
00043 *
00044 * Copyright (c) 1996,1997
00045 * Silicon Graphics Computer Systems, Inc.
00046 *
00047 * Permission to use, copy, modify, distribute and sell this software
00048 * and its documentation for any purpose is hereby granted without fee,
00049 * provided that the above copyright notice appear in all copies and
00050 * that both that copyright notice and this permission notice appear
00051 * in supporting documentation. Silicon Graphics makes no
00052 * representations about the suitability of this software for any
00053 * purpose. It is provided "as is" without express or implied warranty.
00054 */
00055
00061 #ifndef __GLIBCPP_INTERNAL_PAIR_H
00062 #define __GLIBCPP_INTERNAL_PAIR_H
00063
00064 namespace std
00065 {
00066
00068 template <class _T1, class _T2>
00069 struct pair {
00070 typedef _T1 first_type;
00071 typedef _T2 second_type;
00072
00073 _T1 first;
00074 _T2 second;
00075 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
00076 //265. std::pair::pair() effects overly restrictive
00079 pair() : first(), second() {}
00080 #else
00081 pair() : first(_T1()), second(_T2()) {}
00082 #endif
00083
00084 pair(const _T1& __a, const _T2& __b) : first(__a), second(__b) {}
00085
00087 template <class _U1, class _U2>
00088 pair(const pair<_U1, _U2>& __p) : first(__p.first), second(__p.second) {}
00089 };
00090
00092 template <class _T1, class _T2>
00093 inline bool operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
00094 {
00095 return __x.first == __y.first && __x.second == __y.second;
00096 }
00097
00099 template <class _T1, class _T2>
00100 inline bool operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
00101 {
00102 return __x.first < __y.first ||
00103 (!(__y.first < __x.first) && __x.second < __y.second);
00104 }
00105
00107 template <class _T1, class _T2>
00108 inline bool operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
00109 return !(__x == __y);
00110 }
00111
00113 template <class _T1, class _T2>
00114 inline bool operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
00115 return __y < __x;
00116 }
00117
00119 template <class _T1, class _T2>
00120 inline bool operator<=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
00121 return !(__y < __x);
00122 }
00123
00125 template <class _T1, class _T2>
00126 inline bool operator>=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) {
00127 return !(__x < __y);
00128 }
00129
00140 template <class _T1, class _T2>
00141 #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
00142 //181. make_pair() unintended behavior
00143 inline pair<_T1, _T2> make_pair(_T1 __x, _T2 __y)
00144 #else
00145 inline pair<_T1, _T2> make_pair(const _T1& __x, const _T2& __y)
00146 #endif
00147 {
00148 return pair<_T1, _T2>(__x, __y);
00149 }
00150
00151 } // namespace std
00152
00153 #endif /* __GLIBCPP_INTERNAL_PAIR_H */
00154
00155 // Local Variables:
00156 // mode:C++
00157 // End:
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