159 lines
4.4 KiB
C++
159 lines
4.4 KiB
C++
// -*- C++ -*-
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/***************************************************************************
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*
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* _pair.h - definition of std::pair
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*
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* $Id: _pair.h 550991 2007-06-26 23:58:07Z sebor $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2005 Rogue Wave Software.
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*
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***************************************************************************
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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**************************************************************************/
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#ifndef _RWSTD_RW_PAIR_H_INCLUDED
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#define _RWSTD_RW_PAIR_H_INCLUDED
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#ifndef _RWSTD_RW_FUNCBASE_H_INCLUDED
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# include <rw/_funcbase.h> // for less
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#endif // _RWSTD_RW_FUNCBASE_H_INCLUDED
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_RWSTD_NAMESPACE (std) {
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// 20.2.2
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template <class _TypeT, class _TypeU>
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struct pair
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{
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typedef _TypeT first_type;
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typedef _TypeU second_type;
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first_type first;
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second_type second;
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// 20.2.2, p2
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pair ()
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#ifndef _RWSTD_NO_EMPTY_MEM_INITIALIZER
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: first (/* lwg issue 265 */), second () { }
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#else
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// assumes types satisfy the CopyConstructible requirements
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: first (first_type ()), second (second_type ()) { }
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#endif // _RWSTD_NO_EMPTY_MEM_INITIALIZER
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// 20.2.2, p3
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pair (const first_type &__x, const second_type &__y)
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: first (__x), second (__y) { }
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// 20.2.2, p4
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template <class _TypeX, class _TypeY>
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pair (const pair <_TypeX, _TypeY> &__rhs)
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: first (__rhs.first), second (__rhs.second) { }
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// lwg issue 353
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template <class _TypeX, class _TypeY>
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pair<_TypeT, _TypeU>& operator= (const pair <_TypeX, _TypeY> &__rhs) {
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return first = __rhs.first, second = __rhs.second, *this;
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}
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};
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// 20.2.2, p5
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template <class _TypeT, class _TypeU>
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inline bool
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operator== (const pair<_TypeT, _TypeU>& __x, const pair<_TypeT, _TypeU>& __y)
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{
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return __x.first == __y.first && __x.second == __y.second;
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}
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template <class _TypeT, class _TypeU>
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inline bool
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operator!= (const pair<_TypeT, _TypeU>& __x, const pair<_TypeT, _TypeU>& __y)
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{
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return !(__x == __y);
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}
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// 20.2.2, p6
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template <class _TypeT, class _TypeU>
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inline bool
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operator< (const pair<_TypeT, _TypeU>& __x, const pair<_TypeT, _TypeU>& __y)
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{
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_STD::less<_TypeT> __lessT;
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// follows resolution of lwg issue 348
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return __lessT (__x.first, __y.first)
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|| ( !__lessT (__y.first, __x.first)
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&& _STD::less<_TypeU>()(__x.second, __y.second));
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}
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template <class _TypeT, class _TypeU>
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inline bool
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operator> (const pair<_TypeT, _TypeU>& __x, const pair<_TypeT, _TypeU>& __y)
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{
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return __y < __x;
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}
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template <class _TypeT, class _TypeU>
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inline bool
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operator>= (const pair<_TypeT, _TypeU>& __x, const pair<_TypeT, _TypeU>& __y)
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{
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return !(__x < __y);
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}
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template <class _TypeT, class _TypeU>
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inline bool
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operator<= (const pair<_TypeT, _TypeU>& __x, const pair<_TypeT, _TypeU>& __y)
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{
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return !(__y < __x);
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}
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// 20.2.2, p7, signature follows lwg issue 181
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template <class _TypeT, class _TypeU>
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inline pair<_TypeT, _TypeU>
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make_pair (_TypeT __x, _TypeU __y)
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{
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return pair<_TypeT, _TypeU>(__x, __y);
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}
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} // namespace std
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#endif // _RWSTD_RW_PAIR_H_INCLUDED
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