--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/porting/src/rpptreewalker.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** 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 qt3to4 porting application 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef RPPTREEWALKER_H
+#define RPPTREEWALKER_H
+
+#include "rpp.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace Rpp {
+
+class RppTreeWalker
+{
+public:
+    virtual ~RppTreeWalker(){};
+    virtual void evaluateItem(const Item *item);
+    virtual void evaluateItemComposite(const ItemComposite *itemComposite);
+    virtual void evaluateSource(const Source *source);
+    virtual void evaluateDirective(const Directive *directive);
+    virtual void evaluateIfSection(const IfSection *ifSection);
+    virtual void evaluateConditionalDirective(const ConditionalDirective *conditionalDirective);
+
+    virtual void evaluateText(const Text *textLine) {Q_UNUSED(textLine);}
+    virtual void evaluateEmptyDirective(const EmptyDirective *directive) {Q_UNUSED(directive);}
+    virtual void evaluateErrorDirective(const ErrorDirective *directive) {Q_UNUSED(directive);}
+    virtual void evaluatePragmaDirective(const PragmaDirective *directive) {Q_UNUSED(directive);}
+    virtual void evaluateIncludeDirective(const IncludeDirective *directive) {Q_UNUSED(directive);}
+    virtual void evaluateDefineDirective(const DefineDirective *directive) {Q_UNUSED(directive);}
+    virtual void evaluateUndefDirective(const UndefDirective *directive) {Q_UNUSED(directive);}
+    virtual void evaluateLineDirective(const LineDirective *directive) {Q_UNUSED(directive);}
+    virtual void evaluateNonDirective(const NonDirective *directive) {Q_UNUSED(directive);}
+
+    virtual void evaluateIfdefDirective(const IfdefDirective *directive);
+    virtual void evaluateIfndefDirective(const IfndefDirective *directive);
+    virtual void evaluateIfDirective(const IfDirective *directive);
+    virtual void evaluateElifDirective(const ElifDirective *directive);
+    virtual void evaluateElseDirective(const ElseDirective *directive);
+
+    virtual void evaluateEndifDirective(const EndifDirective *directive) {Q_UNUSED(directive);}
+};
+
+}
+
+QT_END_NAMESPACE
+
+#endif