/data/gitorious.org/libyui/libyui-master/src/ImplPtr.h

/**************************************************************************
Copyright (C) 2000 - 2010 Novell, Inc.
All Rights Reserved.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

**************************************************************************/


/*---------------------------------------------------------------------\
|                                                                      |
|                      __   __    ____ _____ ____                      |
|                      \ \ / /_ _/ ___|_   _|___ \                     |
|                       \ V / _` \___ \ | |   __) |                    |
|                        | | (_| |___) || |  / __/                     |
|                        |_|\__,_|____/ |_| |_____|                    |
|                                                                      |
|                               core system                            |
|                                                        (C) SuSE GmbH |
\----------------------------------------------------------------------/

  File:       ImplPtr.h

  Author:     Michael Andres <ma@suse.de>

/-*/

#ifndef ImplPtr_h
#define ImplPtr_h

#include <boost/noncopyable.hpp>
#include <boost/scoped_ptr.hpp>

template<class _Impl>
class ImplPtr : private boost::noncopyable
{
    typedef typename boost::scoped_ptr<_Impl>::unspecified_bool_type unspecified_bool_type;

public:
    typedef _Impl element_type;

    explicit
    ImplPtr( _Impl * impl_r = 0 )    : _impl( impl_r ) {}

public:
    void reset( _Impl * impl_r = 0 ) { _impl.reset( impl_r ); }

    void swap( ImplPtr rhs )         { _impl.swap( rhs._impl ); }

public:
    operator unspecified_bool_type() const { return _impl; }

    const _Impl & operator*()  const { return *_impl; }
    const _Impl * operator->() const { return _impl.get(); }
    const _Impl * get()        const { return _impl.get(); }

    _Impl &       operator*()        { return *_impl; }
    _Impl *       operator->()       { return _impl.get(); }
    _Impl *       get()              { return _impl.get(); }

private:
    boost::scoped_ptr<_Impl> _impl;
};

template<class _Impl>
inline bool operator==( ImplPtr<_Impl> & lhs, ImplPtr<_Impl> & rhs ) { return lhs.get() == rhs.get(); }

template<class _Impl>
inline bool operator!=( ImplPtr<_Impl> & lhs, ImplPtr<_Impl> & rhs ) { return lhs.get() != rhs.get(); }

template<class _Impl>
inline bool operator< ( ImplPtr<_Impl> & lhs, ImplPtr<_Impl> & rhs ) { return lhs.get() <  rhs.get(); }

#endif // ImplPtr_h