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diff --git a/src/xmlpatterns/expr/qemptycontainer_p.h b/src/xmlpatterns/expr/qemptycontainer_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 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_EmptyContainer_H
+#define Patternist_EmptyContainer_H
+
+#include "qexpression_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    /**
+     * @short Base class for expressions that has no operands.
+     *
+     * @author Frans Englich <frans.englich@nokia.com>
+     * @ingroup Patternist_expressions
+     */
+    class Q_AUTOTEST_EXPORT EmptyContainer : public Expression
+    {
+    public:
+        /**
+         * @returns always an empty list.
+         */
+        virtual Expression::List operands() const;
+
+        /**
+         * Does nothing, since sub-classes has no operands. Calling
+         * it makes hence no sense, and it also results in an assert crash.
+         */
+        virtual void setOperands(const Expression::List &);
+
+    protected:
+        /**
+         * @returns always @c true
+         */
+        virtual bool compressOperands(const StaticContext::Ptr &context);
+
+        /**
+         * @returns always an empty list since it has no operands.
+         */
+        virtual SequenceType::List expectedOperandTypes() const;
+
+    };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif