traits.hh

// Copyright (C) 2001, 2002, 2003  EPITA Research and Development Laboratory
//
// This file is part of the Olena Library.  This library 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.
//
// This library 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 library; see the file COPYING.  If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.
//
// As a special exception, you may use this file as part of a free
// software library without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to
// produce an executable, this file does not by itself cause the
// resulting executable to be covered by the GNU General Public
// License.  This exception does not however invalidate any other
// reasons why the executable file might be covered by the GNU General
// Public License.

#ifndef NTG_CORE_INTERNAL_TRAITS_HH
# define NTG_CORE_INTERNAL_TRAITS_HH

/*
  Traits used internally, encapsulated in type_traits for external
  use.
*/

# include <ntg/core/abstract_hierarchy.hh>

namespace ntg {

  namespace internal {

    /*-----------.
    | typetraits |
    `-----------*/


    template <class T>
    struct typetraits
    {
      typedef data_type abstract_type;
    };

    /*---------.
    | optraits |
    `---------*/

    /*
      It should be specialized for every types.
    */
    template <class T>
    struct optraits
    {
      static std::string name()
      {
        return "unknown_data_type";
      }
    };

  } // end of internal.

} // end of ntg.

#endif // !NTG_CORE_INTERNAL_TRAITS_HH

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