/*
  WRAPPERPTR.hpp  -  variant record able to hold a pointer to some smart-ptr/wrapper types, providing conversions

  Copyright (C)         Lumiera.org
    2008,               Hermann Vosseler <Ichthyostega@web.de>

  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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/



#ifndef LUMIERA_WRAPPERPTR_H
#define LUMIERA_WRAPPERPTR_H


#include "lib/variant-o.hpp"
#include "lib/access-casted-o.hpp"

#include "lib/meta/typelist.hpp"
#include "proc/mobject/placement.hpp"
#include "lib/p.hpp"


namespace proc {
  namespace asset   { class Asset; }
  namespace mobject { class MObject; }
  
  
  typedef lib::meta::Types < mobject::Placement<mobject::MObject>*
                           , lib::P<asset::Asset>*
                           > ::List
                           WrapperTypes;
}

namespace lumiera {
  
  
  
  /** 
   * helper to treat various sorts of smart-ptrs uniformly.
   * Implemented as a variant-type value object, it is preconfigured
   * with the possible hierarchy-base classes used within this application.
   * Thus, when passing in an arbitrary smart-ptr, the best fitting smart-ptr
   * type pointing to the corresponding base class is selected for internal storage.
   * Later on, stored values can be retrieved either utilising static or dynamic casts;
   * error reporting is similar to the behaviour of dynamic_cast<T>: when retrieving
   * a pointer, NULL is returned in case of mismatch.
   * 
   * @deprecated not sure if this was a good idea anyway. Better re-think how to handle wrapped objects in visitation
   * @todo really need to switch to the new lib::Variant and util::AccessCasted implementation  ////////////////TICKET #450
   */
  typedef lib::VariantO<proc::WrapperTypes, util::AccessCasted_O> WrapperPtr;
  
  
  
} // namespace lumiera 
#endif
