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diff --git a/src/qml/qml/qqmlabstractbinding_p.h b/src/qml/qml/qqmlabstractbinding_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQMLABSTRACTBINDING_P_H
+#define QQMLABSTRACTBINDING_P_H
+
+//
+//  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.
+//
+
+#include <QtCore/qsharedpointer.h>
+#include <private/qtqmlglobal_p.h>
+#include <private/qqmlproperty_p.h>
+#include <private/qpointervaluepair_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_QML_PRIVATE_EXPORT QQmlAbstractBinding
+{
+public:
+    typedef QWeakPointer<QQmlAbstractBinding> Pointer;
+
+    QQmlAbstractBinding();
+
+    virtual void destroy();
+
+    virtual QString expression() const;
+
+    enum Type { PropertyBinding, ValueTypeProxy };
+    virtual Type bindingType() const { return PropertyBinding; }
+
+    // Should return the encoded property index for the binding.  Should return this value
+    // even if the binding is not enabled or added to an object.
+    // Encoding is:  coreIndex | (valueTypeIndex << 24)
+    virtual int propertyIndex() const = 0;
+    // Should return the object for the binding.  Should return this object even if the
+    // binding is not enabled or added to the object.
+    virtual QObject *object() const = 0;
+
+    void setEnabled(bool e) { setEnabled(e, QQmlPropertyPrivate::DontRemoveBinding); }
+    virtual void setEnabled(bool, QQmlPropertyPrivate::WriteFlags) = 0;
+
+    void update() { update(QQmlPropertyPrivate::DontRemoveBinding); }
+    virtual void update(QQmlPropertyPrivate::WriteFlags) = 0;
+
+    void addToObject();
+    void removeFromObject();
+
+    static inline Pointer getPointer(QQmlAbstractBinding *p);
+    static void printBindingLoopError(QQmlProperty &prop);
+
+protected:
+    virtual ~QQmlAbstractBinding();
+    void clear();
+
+    // Called by QQmlPropertyPrivate to "move" a binding to a different property.
+    // This is only used for alias properties, and only used by QQmlBinding not
+    // V8 or V4 bindings.  The default implementation qFatal()'s to ensure that the
+    // method is never called for V4 or V8 bindings.
+    virtual void retargetBinding(QObject *, int);
+private:
+    Pointer weakPointer();
+
+    friend class QQmlData;
+    friend class QQmlComponentPrivate;
+    friend class QQmlValueTypeProxyBinding;
+    friend class QQmlPropertyPrivate;
+    friend class QQmlVME;
+    friend class QtSharedPointer::ExternalRefCount<QQmlAbstractBinding>;
+
+    typedef QSharedPointer<QQmlAbstractBinding> SharedPointer;
+    // To save memory, we also store the rarely used weakPointer() instance in here
+    QPointerValuePair<QQmlAbstractBinding*, SharedPointer> m_mePtr;
+
+    QQmlAbstractBinding **m_prevBinding;
+    QQmlAbstractBinding  *m_nextBinding;
+};
+
+QQmlAbstractBinding::Pointer
+QQmlAbstractBinding::getPointer(QQmlAbstractBinding *p)
+{
+    return p ? p->weakPointer() : Pointer();
+}
+
+QT_END_NAMESPACE
+
+#endif // QQMLABSTRACTBINDING_P_H