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# qptrstack.h

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

    /****************************************************************************
    ** $Id: qt/qptrstack.h   3.3.3   edited May 27 2003 $
    **
    ** Definition of QPtrStack pointer based template class
    **
    ** Created : 920917
    **
    ** Copyright (C) 1992-2000 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.
    **
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    **********************************************************************/

    #ifndef QPTRSTACK_H
    #define QPTRSTACK_H

    #ifndef QT_H
    #include "qglist.h"
    #endif // QT_H

    template<class type>
    class QPtrStack : protected QGList
    {
    public:
        QPtrStack()				{ }
        QPtrStack( const QPtrStack<type> &s ) : QGList( s ) { }
        ~QPtrStack()			{ clear(); }
        QPtrStack<type> &operator=(const QPtrStack<type> &s)
    			{ return (QPtrStack<type>&)QGList::operator=(s); }
        bool  autoDelete() const		{ return QPtrCollection::autoDelete(); }
        void  setAutoDelete( bool del )	{ QPtrCollection::setAutoDelete(del); }
        uint  count()   const		{ return QGList::count(); }
        bool  isEmpty() const		{ return QGList::count() == 0; }
        void  push( const type *d )		{ QGList::insertAt(0,Item(d)); }
        type *pop()				{ return (type *)QGList::takeFirst(); }
        bool  remove()			{ return QGList::removeFirst(); }
        void  clear()			{ QGList::clear(); }
        type *top()	    const		{ return (type *)QGList::cfirst(); }
    	  operator type *() const	{ return (type *)QGList::cfirst(); }
        type *current() const		{ return (type *)QGList::cfirst(); }

    #ifdef Q_QDOC
    protected:
        virtual QDataStream& read( QDataStream&, QPtrCollection::Item& );
        virtual QDataStream& write( QDataStream&, QPtrCollection::Item ) const;
    #endif

    private:
        void  deleteItem( Item d );
    };

    #if !defined(Q_BROKEN_TEMPLATE_SPECIALIZATION)
    template<> inline void QPtrStack<void>::deleteItem( QPtrCollection::Item )
    {
    }
    #endif

    template<class type> inline void QPtrStack<type>::deleteItem( QPtrCollection::Item d )
    {
        if ( del_item ) delete (type *)d;
    }

    #ifndef QT_NO_COMPAT
    #define QStack QPtrStack
    #endif

    #endif // QPTRSTACK_H