/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtCore module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Digia. For licensing terms and ** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/contact-us. ** ** 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, Digia gives you certain additional ** rights. These rights are described in the Digia 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. ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #ifndef QPOINTER_H #define QPOINTER_H #include QT_BEGIN_HEADER QT_BEGIN_NAMESPACE QT_MODULE(Core) template class QPointer { QObject *o; public: inline QPointer() : o(0) {} inline QPointer(T *p) : o(p) { QMetaObject::addGuard(&o); } inline QPointer(const QPointer &p) : o(p.o) { QMetaObject::addGuard(&o); } inline ~QPointer() { QMetaObject::removeGuard(&o); } inline QPointer &operator=(const QPointer &p) { if (this != &p) QMetaObject::changeGuard(&o, p.o); return *this; } inline QPointer &operator=(T* p) { if (o != p) QMetaObject::changeGuard(&o, p); return *this; } inline bool isNull() const { return !o; } inline T* operator->() const { return static_cast(const_cast(o)); } inline T& operator*() const { return *static_cast(const_cast(o)); } inline operator T*() const { return static_cast(const_cast(o)); } inline T* data() const { return static_cast(const_cast(o)); } }; #if (!defined(Q_CC_SUN) || (__SUNPRO_CC >= 0x580)) // ambiguity between const T * and T * template inline bool operator==(const T *o, const QPointer &p) { return o == p.operator->(); } template inline bool operator==(const QPointer &p, const T *o) { return p.operator->() == o; } #else template inline bool operator==(const void *o, const QPointer &p) { return o == p.operator->(); } template inline bool operator==(const QPointer &p, const void *o) { return p.operator->() == o; } #endif template inline bool operator==(T *o, const QPointer &p) { return o == p.operator->(); } template inline bool operator==(const QPointer &p, T *o) { return p.operator->() == o; } template inline bool operator==(const QPointer &p1, const QPointer &p2) { return p1.operator->() == p2.operator->(); } #if (!defined(Q_CC_SUN) || (__SUNPRO_CC >= 0x580)) // ambiguity between const T * and T * template inline bool operator!=(const T *o, const QPointer &p) { return o != p.operator->(); } template inline bool operator!= (const QPointer &p, const T *o) { return p.operator->() != o; } #else template inline bool operator!= (const void *o, const QPointer &p) { return o != p.operator->(); } template inline bool operator!= (const QPointer &p, const void *o) { return p.operator->() != o; } #endif template inline bool operator!=(T *o, const QPointer &p) { return o != p.operator->(); } template inline bool operator!= (const QPointer &p, T *o) { return p.operator->() != o; } template inline bool operator!= (const QPointer &p1, const QPointer &p2) { return p1.operator->() != p2.operator->() ; } // Make MSVC < 1400 (2005) handle "if (NULL == p)" syntax #if defined(Q_CC_MSVC) && (_MSC_VER < 1400) template inline bool operator== (int i, const QPointer &p) { Q_ASSERT(i == 0); return !i && p.isNull(); } template inline bool operator!= (int i, const QPointer &p) { Q_ASSERT(i == 0); return !i && !p.isNull(); } #endif QT_END_NAMESPACE QT_END_HEADER #endif // QPOINTER_H