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/****************************************************************************
**
** http://www.qxorm.com/
** http://sourceforge.net/projects/qxorm/
** Original file by Lionel Marty
**
** This file is part of the QxOrm library
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any
** damages arising from the use of this software.
**
** GNU Lesser General Public License Usage
** This file must 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.txt' 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.
**
** If you have questions regarding the use of this file, please contact :
** contact@qxorm.com
**
****************************************************************************/
#ifndef _QX_IS_BOOST_WEAK_PTR_H_
#define _QX_IS_BOOST_WEAK_PTR_H_
#ifdef _MSC_VER
#pragma once
#endif
/*!
* \file is_boost_weak_ptr.h
* \author Lionel Marty
* \ingroup QxTraits
* \brief qx::trait::is_boost_weak_ptr<T>::value : return true if T is a boost::weak_ptr<> smart-pointer, otherwise return false
*/
#include <boost/weak_ptr.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/logical.hpp>
namespace qx {
namespace trait {
/*!
* \ingroup QxTraits
* \brief qx::trait::is_boost_weak_ptr<T>::value : return true if T is a boost::weak_ptr<> smart-pointer, otherwise return false
*/
template <typename T>
class is_boost_weak_ptr
{
private:
template <typename V> static char isSmartPtr(boost::weak_ptr<V>);
static int isSmartPtr(...);
static T t;
public:
enum { value = (sizeof(qx::trait::is_boost_weak_ptr<T>::isSmartPtr(t)) == sizeof(char)) };
typedef typename boost::mpl::if_c<qx::trait::is_boost_weak_ptr<T>::value,
boost::mpl::true_,
boost::mpl::false_>::type type;
};
} // namespace trait
} // namespace qx
#endif // _QX_IS_BOOST_WEAK_PTR_H_
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