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/* vim: set sw=4 sts=4 et foldmethod=syntax : */
/*
* Copyright (c) 2007, 2008, 2010 Ciaran McCreesh
*
* This file is part of the Paludis package manager. Paludis is free software;
* you can redistribute it and/or modify it under the terms of the GNU General
* Public License version 2, as published by the Free Software Foundation.
*
* Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PALUDIS_GUARD_PALUDIS_UTIL_MAKE_NULL_SHARED_PTR_HH
#define PALUDIS_GUARD_PALUDIS_UTIL_MAKE_NULL_SHARED_PTR_HH 1
#include <memory>
/** \file
* Declarations for the make_null_shared_ptr function.
*
* \ingroup g_utils
*
* \section Examples
*
* - None at this time.
*/
namespace paludis
{
/**
* An object that can convert itself into an empty std::shared_ptr<>
* of any type.
*
* \see make_null_shared_ptr()
* \since 0.32
* \ingroup g_utils
*/
struct PALUDIS_VISIBLE NullSharedPtr
{
template <typename T_>
inline operator std::shared_ptr<T_> () const
{
return std::shared_ptr<T_>();
}
};
inline NullSharedPtr make_null_shared_ptr()
{
return NullSharedPtr();
}
}
#endif
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