qpair.h Include File

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# qpair.h

This is the verbatim text of the qpair.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    **
    ** Definition of QPair class
    **
    **
    ** Copyright (C) 1992-2005 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the tools module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
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    **********************************************************************/

    #ifndef QPAIR_H
    #define QPAIR_H

    #ifndef QT_H
    #include "qglobal.h"
    #include "qdatastream.h"
    #endif // QT_H

    template <class T1, class T2>
    struct QPair
    {
        typedef T1 first_type;
        typedef T2 second_type;

        QPair()
    	: first( T1() ), second( T2() )
        {}
        QPair( const T1& t1, const T2& t2 )
    	: first( t1 ), second( t2 )
        {}

        QPair<T1, T2>& operator=(const QPair<T1, T2>& other)
        {
    	if (this != &other) {
    	    first = other.first;
    	    second = other.second;
    	}
    	return *this;
        }

        T1 first;
        T2 second;
    };

    template <class T1, class T2>
    Q_INLINE_TEMPLATES bool operator==( const QPair<T1, T2>& x, const QPair<T1, T2>& y )
    {
        return x.first == y.first && x.second == y.second;
    }

    template <class T1, class T2>
    Q_INLINE_TEMPLATES bool operator<( const QPair<T1, T2>& x, const QPair<T1, T2>& y )
    {
        return x.first < y.first ||
    	   ( !( y.first < x.first ) && x.second < y.second );
    }

    template <class T1, class T2>
    Q_INLINE_TEMPLATES QPair<T1, T2> qMakePair( const T1& x, const T2& y )
    {
        return QPair<T1, T2>( x, y );
    }

    #ifndef QT_NO_DATASTREAM
    template <class T1, class T2>
    inline QDataStream& operator>>( QDataStream& s, QPair<T1, T2>& p )
    {
        s >> p.first >> p.second;
        return s;
    }

    template <class T1, class T2>
    inline QDataStream& operator<<( QDataStream& s, const QPair<T1, T2>& p )
    {
        s << p.first << p.second;
        return s;
    }
    #endif

    #endif