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128 lines
4.7 KiB
128 lines
4.7 KiB
/****************************************************************************
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**
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** https://www.qxorm.com/
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** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
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**
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** This file is part of the QxOrm library
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any
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** damages arising from the use of this software
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**
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** Commercial Usage
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** Licensees holding valid commercial QxOrm licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Lionel Marty
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file 'license.gpl3.txt' included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met : http://www.gnu.org/copyleft/gpl.html
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**
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** If you are unsure which license is appropriate for your use, or
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** if you have questions regarding the use of this file, please contact :
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** contact@qxorm.com
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**
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****************************************************************************/
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#ifndef _QX_CONSTRUCT_PTR_H_
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#define _QX_CONSTRUCT_PTR_H_
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#ifdef _MSC_VER
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#pragma once
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#endif
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/*!
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* \file construct_ptr.h
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* \author Lionel Marty
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* \ingroup QxTraits
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* \brief qx::trait::construct_ptr<T>::get(T & t, bool bReset = false) : instantiate (or reset) a new pointer, support both nude-pointer and smart-pointer of boost, Qt and QxOrm libraries
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*/
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#include <QtCore/qsharedpointer.h>
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#if (QT_VERSION >= QT_VERSION_CHECK(4, 6, 0))
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#include <QtCore/qscopedpointer.h>
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#endif // (QT_VERSION >= QT_VERSION_CHECK(4, 6, 0))
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#include <QxDao/QxDaoPointer.h>
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namespace qx {
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namespace trait {
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/*!
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* \ingroup QxTraits
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* \brief qx::trait::construct_ptr<T>::get(T & t, bool bReset = false) : instantiate (or reset) a new pointer, support both nude-pointer and smart-pointer of boost, Qt and QxOrm libraries
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*/
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template <typename T>
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struct construct_ptr
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{
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private:
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typedef typename std::remove_pointer<T>::type type_ptr;
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public:
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static inline void get(T & t, bool bReset = false)
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{ new_ptr<std::is_abstract<type_ptr>::value, 0>::get(t, bReset); }
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private:
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template <bool isAbstract /* = false */, int dummy>
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struct new_ptr
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{ static inline void get(T & t, bool bReset) { if (bReset) { t = NULL; } else { t = new type_ptr(); } } };
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template <int dummy>
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struct new_ptr<true, dummy>
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{ static inline void get(T & t, bool bReset) { Q_UNUSED(t); Q_UNUSED(bReset); qDebug("[QxOrm] qx::trait::construct_ptr<T> : %s", "cannot instantiate abstract class"); } };
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};
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#ifdef _QX_ENABLE_BOOST
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template <typename T>
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struct construct_ptr< boost::scoped_ptr<T> >
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{ static inline void get(boost::scoped_ptr<T> & t, bool bReset = false) { if (bReset) { t.reset(); } else { t.reset(new T()); } } };
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template <typename T>
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struct construct_ptr< boost::shared_ptr<T> >
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{ static inline void get(boost::shared_ptr<T> & t, bool bReset = false) { if (bReset) { t.reset(); } else { t.reset(new T()); } } };
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template <typename T>
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struct construct_ptr< boost::intrusive_ptr<T> >
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{ static inline void get(boost::intrusive_ptr<T> & t, bool bReset = false) { if (bReset) { t.reset(); } else { t.reset(new T()); } } };
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#endif // _QX_ENABLE_BOOST
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template <typename T>
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struct construct_ptr< QSharedPointer<T> >
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{ static inline void get(QSharedPointer<T> & t, bool bReset = false) { if (bReset) { t = QSharedPointer<T>(); } else { t = QSharedPointer<T>(new T()); } } };
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#if (QT_VERSION >= QT_VERSION_CHECK(4, 6, 0))
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template <typename T>
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struct construct_ptr< QScopedPointer<T> >
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{ static inline void get(QScopedPointer<T> & t, bool bReset = false) { if (bReset) { t = QScopedPointer<T>(); } else { t = QScopedPointer<T>(new T()); } } };
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#endif // (QT_VERSION >= QT_VERSION_CHECK(4, 6, 0))
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template <typename T>
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struct construct_ptr< qx::dao::ptr<T> >
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{ static inline void get(qx::dao::ptr<T> & t, bool bReset = false) { if (bReset) { t = qx::dao::ptr<T>(); } else { t = qx::dao::ptr<T>(new T()); } } };
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template <typename T>
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struct construct_ptr< std::unique_ptr<T> >
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{ static inline void get(std::unique_ptr<T> & t, bool bReset = false) { if (bReset) { t.reset(); } else { t.reset(new T()); } } };
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template <typename T>
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struct construct_ptr< std::shared_ptr<T> >
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{ static inline void get(std::shared_ptr<T> & t, bool bReset = false) { if (bReset) { t.reset(); } else { t = std::make_shared<T>(); } } };
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} // namespace trait
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} // namespace qx
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#endif // _QX_CONSTRUCT_PTR_H_
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