stl_relops.h revision 169692
1// std::rel_ops implementation -*- C++ -*- 2 3// Copyright (C) 2001, 2002, 2004, 2005 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 2, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30/* 31 * 32 * Copyright (c) 1994 33 * Hewlett-Packard Company 34 * 35 * Permission to use, copy, modify, distribute and sell this software 36 * and its documentation for any purpose is hereby granted without fee, 37 * provided that the above copyright notice appear in all copies and 38 * that both that copyright notice and this permission notice appear 39 * in supporting documentation. Hewlett-Packard Company makes no 40 * representations about the suitability of this software for any 41 * purpose. It is provided "as is" without express or implied warranty. 42 * 43 * Copyright (c) 1996,1997 44 * Silicon Graphics 45 * 46 * Permission to use, copy, modify, distribute and sell this software 47 * and its documentation for any purpose is hereby granted without fee, 48 * provided that the above copyright notice appear in all copies and 49 * that both that copyright notice and this permission notice appear 50 * in supporting documentation. Silicon Graphics makes no 51 * representations about the suitability of this software for any 52 * purpose. It is provided "as is" without express or implied warranty. 53 * 54 */ 55 56/** @file stl_relops.h 57 * This is an internal header file, included by other library headers. 58 * You should not attempt to use it directly. 59 * 60 * @if maint 61 * Inclusion of this file has been removed from 62 * all of the other STL headers for safety reasons, except std_utility.h. 63 * For more information, see the thread of about twenty messages starting 64 * with http://gcc.gnu.org/ml/libstdc++/2001-01/msg00223.html , or the 65 * FAQ at http://gcc.gnu.org/onlinedocs/libstdc++/faq/index.html#4_4 . 66 * 67 * Short summary: the rel_ops operators should be avoided for the present. 68 * @endif 69 */ 70 71#ifndef _STL_RELOPS_H 72#define _STL_RELOPS_H 1 73 74_GLIBCXX_BEGIN_NAMESPACE(std) 75 76 namespace rel_ops 77 { 78 /** @namespace std::rel_ops 79 * @brief The generated relational operators are sequestered here. 80 */ 81 82 /** 83 * @brief Defines @c != for arbitrary types, in terms of @c ==. 84 * @param x A thing. 85 * @param y Another thing. 86 * @return x != y 87 * 88 * This function uses @c == to determine its result. 89 */ 90 template <class _Tp> 91 inline bool 92 operator!=(const _Tp& __x, const _Tp& __y) 93 { return !(__x == __y); } 94 95 /** 96 * @brief Defines @c > for arbitrary types, in terms of @c <. 97 * @param x A thing. 98 * @param y Another thing. 99 * @return x > y 100 * 101 * This function uses @c < to determine its result. 102 */ 103 template <class _Tp> 104 inline bool 105 operator>(const _Tp& __x, const _Tp& __y) 106 { return __y < __x; } 107 108 /** 109 * @brief Defines @c <= for arbitrary types, in terms of @c <. 110 * @param x A thing. 111 * @param y Another thing. 112 * @return x <= y 113 * 114 * This function uses @c < to determine its result. 115 */ 116 template <class _Tp> 117 inline bool 118 operator<=(const _Tp& __x, const _Tp& __y) 119 { return !(__y < __x); } 120 121 /** 122 * @brief Defines @c >= for arbitrary types, in terms of @c <. 123 * @param x A thing. 124 * @param y Another thing. 125 * @return x >= y 126 * 127 * This function uses @c < to determine its result. 128 */ 129 template <class _Tp> 130 inline bool 131 operator>=(const _Tp& __x, const _Tp& __y) 132 { return !(__x < __y); } 133 134 } // namespace rel_ops 135 136_GLIBCXX_END_NAMESPACE 137 138#endif /* _STL_RELOPS_H */ 139