semigroup_base.hh

// semigroup_base.hh: this file is part of the Vaucanson project.
//
// Vaucanson, a generic library for finite state machines.
//
// Copyright (C) 2001, 2002, 2003, 2004, 2005 The Vaucanson Group.
//
// 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.
//
// The complete GNU General Public Licence Notice can be found as the
// `COPYING' file in the root directory.
//
// The Vaucanson Group consists of people listed in the `AUTHORS' file.
//
#ifndef VCSN_ALGEBRA_CONCEPT_SEMIGROUP_BASE_HH
# define VCSN_ALGEBRA_CONCEPT_SEMIGROUP_BASE_HH

# include <vaucanson/design_pattern/design_pattern.hh>

namespace vcsn {

  namespace algebra {



    struct mul_kind
    {};

    struct add_kind
    {};

    template<class Self>
    struct SemigroupBase : Structure<Self>
    {
    protected:
      SemigroupBase();

      SemigroupBase(const SemigroupBase& other);
    };

  } // algebra

  /*-------------------------------------.
  | dynamic_traits<SemigroupBase<Self> > |
  `-------------------------------------*/

  template<class Self>
  struct dynamic_traits<algebra::SemigroupBase<Self> >
    : dynamic_traits<Structure<Self> >
  { };

  template<typename S>
  struct virtual_types<algebra::SemigroupBase<S> >
    : virtual_types<Structure<S> >
  {
    typedef undefined_type semigroup_kind;
  };


  /*-----------------------------------.
  | MetaElement<SemigroupBase<Self>,T> |
  `-----------------------------------*/

  template<class Self, typename T>
  struct MetaElement<algebra::SemigroupBase<Self>, T>
    : MetaElement<Structure<Self>, T>
  {
  protected:
    MetaElement();

    MetaElement(const MetaElement& other);
  };

} // vcsn

# ifndef VCSN_USE_INTERFACE_ONLY
#  include <vaucanson/algebra/concept/semigroup_base.hxx>
# endif // VCSN_USE_INTERFACE_ONLY

#endif // ! VCSN_ALGEBRA_CONCEPT_SEMIGROUP_BASE_HH

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