# stl_pair.h

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    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: