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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 QLAZILYALLOCATED_P_H
+#define QLAZILYALLOCATED_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/qglobal.h>
+
+#include <private/qflagpointer_p.h>
+
+QT_BEGIN_NAMESPACE
+
+template<typename T>
+class QLazilyAllocated {
+public:
+ inline QLazilyAllocated();
+ inline ~QLazilyAllocated();
+
+ inline bool isAllocated() const;
+
+ inline T *operator->() const;
+
+ inline T &value();
+ inline const T &value() const;
+
+ inline bool flag() const;
+ inline void setFlag();
+ inline void clearFlag();
+ inline void setFlagValue(bool);
+private:
+ mutable QFlagPointer<T> d;
+};
+
+template<typename T>
+QLazilyAllocated<T>::QLazilyAllocated()
+{
+}
+
+template<typename T>
+QLazilyAllocated<T>::~QLazilyAllocated()
+{
+ delete *d;
+}
+
+template<typename T>
+bool QLazilyAllocated<T>::isAllocated() const
+{
+ return !d.isNull();
+}
+
+template<typename T>
+T &QLazilyAllocated<T>::value()
+{
+ if (d.isNull()) d = new T;
+ return *(*d);
+}
+
+template<typename T>
+const T &QLazilyAllocated<T>::value() const
+{
+ if (d.isNull()) d = new T;
+ return *(*d);
+}
+
+template<typename T>
+T *QLazilyAllocated<T>::operator->() const
+{
+ return *d;
+}
+
+template<typename T>
+bool QLazilyAllocated<T>::flag() const
+{
+ return d.flag();
+}
+
+template<typename T>
+void QLazilyAllocated<T>::setFlag()
+{
+ d.setFlag();
+}
+
+template<typename T>
+void QLazilyAllocated<T>::clearFlag()
+{
+ d.clearFlag();
+}
+
+template<typename T>
+void QLazilyAllocated<T>::setFlagValue(bool v)
+{
+ d.setFlagValue(v);
+}
+
+QT_END_NAMESPACE
+
+#endif // QLAZILYALLOCATED_P_H