diff -r 000000000000 -r 1918ee327afb src/xmlpatterns/iterators/qemptyiterator_p.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/iterators/qemptyiterator_p.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef Patternist_EmptyIterator_H
+#define Patternist_EmptyIterator_H
+
+#include "qabstractxmlforwarditerator_p.h"
+#include "qprimitives_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+
+    /**
+     * @short An QAbstractXmlForwardIterator which always is empty.
+     *
+     * EmptyIterator is an QAbstractXmlForwardIterator over the type @c T, which always is empty. Other
+     * iterators can also be empty(or, at least behave as they are empty), but this
+     * class is special designed for this purpose and is therefore fast.
+     *
+     * EmptyIterator's constructor is protected, instances is retrieved from CommonValues.
+     *
+     * @author Frans Englich <frans.englich@nokia.com>
+     * @ingroup Patternist_iterators
+     */
+    template<typename T> class EmptyIterator : public QAbstractXmlForwardIterator<T>
+    {
+    public:
+        /**
+         * @returns always a default constructed value, T().
+         */
+        virtual T next()
+        {
+            return T();
+        }
+
+        /**
+         * @returns always a default constructed value, T().
+         */
+        virtual T current() const
+        {
+            return T();
+        }
+
+        /**
+         * @returns always 0.
+         */
+        virtual xsInteger position() const
+        {
+            return 0;
+        }
+
+        /**
+         * @returns always @c this, the reverse of <tt>()</tt> is <tt>()</tt>.
+         */
+        virtual typename QAbstractXmlForwardIterator<T>::Ptr toReversed()
+        {
+            return typename QAbstractXmlForwardIterator<T>::Ptr(const_cast<EmptyIterator<T> *>(this));
+        }
+
+        /**
+         * @returns always 0
+         */
+        virtual xsInteger count()
+        {
+            return 0;
+        }
+
+        /**
+         * @returns @c this
+         */
+        virtual typename QAbstractXmlForwardIterator<T>::Ptr copy() const
+        {
+            return typename QAbstractXmlForwardIterator<T>::Ptr(const_cast<EmptyIterator *>(this));
+        }
+
+    protected:
+        friend class CommonValues;
+    };
+
+    template<typename T>
+    static inline
+    typename QAbstractXmlForwardIterator<T>::Ptr
+    makeEmptyIterator()
+    {
+        return typename QAbstractXmlForwardIterator<T>::Ptr(new EmptyIterator<T>());
+    }
+
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif