00001 // std::rel_ops implementation -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2002, 2004, 2005, 2008 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 * Copyright (c) 1996,1997 00044 * Silicon Graphics 00045 * 00046 * Permission to use, copy, modify, distribute and sell this software 00047 * and its documentation for any purpose is hereby granted without fee, 00048 * provided that the above copyright notice appear in all copies and 00049 * that both that copyright notice and this permission notice appear 00050 * in supporting documentation. Silicon Graphics makes no 00051 * representations about the suitability of this software for any 00052 * purpose. It is provided "as is" without express or implied warranty. 00053 * 00054 */ 00055 00056 /** @file stl_relops.h 00057 * This is an internal header file, included by other library headers. 00058 * You should not attempt to use it directly. 00059 * 00060 * Inclusion of this file has been removed from 00061 * all of the other STL headers for safety reasons, except std_utility.h. 00062 * For more information, see the thread of about twenty messages starting 00063 * with http://gcc.gnu.org/ml/libstdc++/2001-01/msg00223.html, or 00064 * http://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.ambiguous_overloads 00065 * 00066 * Short summary: the rel_ops operators should be avoided for the present. 00067 */ 00068 00069 #ifndef _STL_RELOPS_H 00070 #define _STL_RELOPS_H 1 00071 00072 _GLIBCXX_BEGIN_NAMESPACE(std) 00073 00074 namespace rel_ops 00075 { 00076 /** @namespace std::rel_ops 00077 * @brief The generated relational operators are sequestered here. 00078 */ 00079 00080 /** 00081 * @brief Defines @c != for arbitrary types, in terms of @c ==. 00082 * @param x A thing. 00083 * @param y Another thing. 00084 * @return x != y 00085 * 00086 * This function uses @c == to determine its result. 00087 */ 00088 template <class _Tp> 00089 inline bool 00090 operator!=(const _Tp& __x, const _Tp& __y) 00091 { return !(__x == __y); } 00092 00093 /** 00094 * @brief Defines @c > for arbitrary types, in terms of @c <. 00095 * @param x A thing. 00096 * @param y Another thing. 00097 * @return x > y 00098 * 00099 * This function uses @c < to determine its result. 00100 */ 00101 template <class _Tp> 00102 inline bool 00103 operator>(const _Tp& __x, const _Tp& __y) 00104 { return __y < __x; } 00105 00106 /** 00107 * @brief Defines @c <= for arbitrary types, in terms of @c <. 00108 * @param x A thing. 00109 * @param y Another thing. 00110 * @return x <= y 00111 * 00112 * This function uses @c < to determine its result. 00113 */ 00114 template <class _Tp> 00115 inline bool 00116 operator<=(const _Tp& __x, const _Tp& __y) 00117 { return !(__y < __x); } 00118 00119 /** 00120 * @brief Defines @c >= for arbitrary types, in terms of @c <. 00121 * @param x A thing. 00122 * @param y Another thing. 00123 * @return x >= y 00124 * 00125 * This function uses @c < to determine its result. 00126 */ 00127 template <class _Tp> 00128 inline bool 00129 operator>=(const _Tp& __x, const _Tp& __y) 00130 { return !(__x < __y); } 00131 00132 } // namespace rel_ops 00133 00134 _GLIBCXX_END_NAMESPACE 00135 00136 #endif /* _STL_RELOPS_H */