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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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_SourceLocationReflection_H
+#define Patternist_SourceLocationReflection_H
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class QString;
+
+namespace QPatternist
+{
+    /**
+     * @short Base class for all instances that represents something
+     * at a certain location.
+     *
+     * SourceLocationReflection does not provide the source location itself,
+     * the address to an instance is the mark for it, that in turn can be used
+     * for looking up the source location where that mapping is provided.
+     *
+     * However, this SourceLocationReflection is not itself the mark. The real
+     * mark is retrieved by calling actualReflection(). This mechanism
+     * allows a SourceLocationReflection sub-class to delegate, or be an alias,
+     * for another source location mark.
+     *
+     * If sourceLocation() returns a non-null object, it will be used instead
+     * of looking up via actualReflection().
+     *
+     * @author Frans Englich <fenglich@trolltech.com>
+     * @ingroup Patternist_expressions
+     */
+    class Q_AUTOTEST_EXPORT SourceLocationReflection
+    {
+    public:
+        inline SourceLocationReflection()
+        {
+        }
+
+        virtual ~SourceLocationReflection()
+        {
+        }
+
+        virtual const SourceLocationReflection *actualReflection() const = 0;
+
+        /**
+         * A description of what represents the source code location, for
+         * human consumption. Must be translated, as appropriate.
+         */
+        virtual QString description() const
+        {
+            return QString();
+        }
+
+        virtual QSourceLocation sourceLocation() const;
+
+    private:
+        Q_DISABLE_COPY(SourceLocationReflection)
+    };
+
+    class DelegatingSourceLocationReflection : public SourceLocationReflection
+    {
+    public:
+        inline DelegatingSourceLocationReflection(const SourceLocationReflection *const r) : m_r(r)
+        {
+            Q_ASSERT(r);
+        }
+
+        virtual const SourceLocationReflection *actualReflection() const;
+        virtual QString description() const;
+
+    private:
+        const SourceLocationReflection *const m_r;
+    };
+
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif