text: // Copyright (c) 2005, 2006  
  // Utrecht University (The Netherlands),
  // ETH Zurich (Switzerland),
  // INRIA Sophia-Antipolis (France),
  // Max-Planck-Institute Saarbruecken (Germany),
  // and Tel-Aviv University (Israel).  All rights reserved. 
  //
  // This file is part of CGAL (www.cgal.org); you can redistribute it and/or
  // modify it under the terms of the GNU Lesser General Public License as
  // published by the Free Software Foundation; either version 3 of the License,
  // or (at your option) any later version.
  //
  // Licensees holding a valid commercial license may use this file in
  // accordance with the commercial license agreement provided with the software.
  //
  // This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  // WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  //
  // $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/releases/CGAL-4.1-branch/Kernel_23/include/CGAL/Kernel/Type_mapper.h $
  // $Id: Type_mapper.h 69073 2012-05-11 09:20:13Z pmoeller $
  // 
  //
  // Author(s)     : Sylvain Pion
  
  #ifndef CGAL_KERNEL_TYPE_MAPPER_H
  #define CGAL_KERNEL_TYPE_MAPPER_H
  
  #include <CGAL/basic.h>
  #include <boost/type_traits/remove_cv.hpp>
  #include <boost/type_traits/remove_reference.hpp>
  
  namespace CGAL {
  
  namespace internal {
    template<typename T, typename K1, typename K2 >
    struct Type_mapper_impl {
      typedef T type;
    };
  
  // Then we specialize for all kernel objects.
  #define CGAL_Kernel_obj(X) \
    template < typename K1, typename K2 > \
    struct Type_mapper_impl < typename K1::X, K1, K2 > \
    { typedef typename K2::X type; };
  
  #include <CGAL/Kernel/interface_macros.h>
  
  } // internal
  
  // This is a tool to obtain the K2::Point_2 from K1 and K1::Point_2.
  // Similarly for other kernel types.
  
  // TODO : add more specializations ?  Use a different mechanism ?
  
  template < typename T, typename K1, typename K2 >
  struct Type_mapper : 
      internal::Type_mapper_impl< typename boost::remove_cv< 
                                    typename boost::remove_reference < T >::type 
                                    >::type, K1, K2 >
  { };
  
  } //namespace CGAL
  
  #endif // CGAL_KERNEL_TYPE_MAPPER_H
  