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1// std::rel_ops implementation -*- C++ -*-
2
ffe94f83 3// Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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
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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
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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.
ffe94f83 59 *
04b7c941 60 * @if maint
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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.
04b7c941 68 * @endif
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69 */
70
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71#ifndef _CPP_BITS_STL_RELOPS_H
72#define _CPP_BITS_STL_RELOPS_H 1
73
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74namespace std
75{
76 namespace rel_ops
77 {
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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*/
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90template <class _Tp>
91inline bool operator!=(const _Tp& __x, const _Tp& __y) {
92 return !(__x == __y);
93}
94
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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*/
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103template <class _Tp>
104inline bool operator>(const _Tp& __x, const _Tp& __y) {
105 return __y < __x;
106}
107
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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*/
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116template <class _Tp>
117inline bool operator<=(const _Tp& __x, const _Tp& __y) {
118 return !(__y < __x);
119}
120
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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*/
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129template <class _Tp>
130inline bool operator>=(const _Tp& __x, const _Tp& __y) {
131 return !(__x < __y);
132}
133
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134 } // namespace rel_ops
135} // namespace std
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136
137#endif /* _CPP_BITS_STL_RELOPS_H */