decorated_alphabet.hh

// decorated_alphabet.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_IMPLEMENTATION_ALPHABETS_DECORATED_ALPHABET_HH
# define VCSN_ALGEBRA_IMPLEMENTATION_ALPHABETS_DECORATED_ALPHABET_HH

# include <vaucanson/algebra/implementation/alphabets/alphabets.hh>

namespace vcsn {

  namespace algebra {

    /*------------------------.
    | AlphabetDecorator<L, T> |
    `------------------------*/

    template <class L, class T>
    class AlphabetDecorator
    {
    public:
      typedef L         letter_t;
      typedef T         alphabet_impl_t;
      typedef typename T::const_iterator const_iterator;
      typedef typename T::iterator iterator;

      AlphabetDecorator();
      AlphabetDecorator(alphabet_impl_t& alphabet);
      ~AlphabetDecorator();

      letter_t joker() const;
      letter_t other() const;
      void insert(L);
      unsigned size() const;
      iterator begin();
      iterator end();
      const_iterator begin() const;
      const_iterator end() const;
      alphabet_impl_t& alphabet();
      const alphabet_impl_t& alphabet() const;

    private:
      alphabet_impl_t* alphabet_;
      letter_t         joker_;
      letter_t         other_;
      bool             alphabet_owner_;
    };


    /*---------------------------------------------------------.
    | alphabet_traits<AlphabetSet<L>, AlphabetDecorator<L, T>> |
    `---------------------------------------------------------*/

    template<typename L, typename T>
    struct alphabet_traits<AlphabetSet<L>, AlphabetDecorator<L, T> >
    {
      typedef L                 letter_t;
    };

  } // algebra

  /*-----------------------------------------------------.
  | MetaElement<AlphabetSet<L>, AlphabetDecorator<L, T>> |
  `-----------------------------------------------------*/

  template<typename L, typename T>
  struct MetaElement<algebra::AlphabetSet<L>, algebra::AlphabetDecorator<L, T> >
    : MetaElement<algebra::AlphabetSetBase<algebra::AlphabetSet<L> >,
                  algebra::AlphabetDecorator<L, T> >
  {
    static const bool dynamic_value =
    MetaElement<algebra::AlphabetSet<L>,T >::dynamic_value;

    L   joker() const;

    L   other() const;
  };

  template<typename L, typename T>
  bool op_contains(const algebra::AlphabetSet<L>& s,
                   const algebra::AlphabetDecorator<L, T>& a);

  template<typename L, typename T>
  bool op_is_finite(const algebra::AlphabetSet<L>& s,
                    const algebra::AlphabetDecorator<L, T>& a);

  template<typename L, typename T>
  bool op_contains_e(const algebra::AlphabetSet<L>& s,
                     const algebra::AlphabetDecorator<L, T>& a,
                     const L& v);

  template <typename T, typename L>
  bool op_letter_equality(const algebra::AlphabetSet<L>& s,
                                 const algebra::AlphabetDecorator<L, T>& a,
                                 L lhs,
                                 L rhs);


} // vcsn

# ifndef VCSN_USE_INTERFACE_ONLY
#  include <vaucanson/algebra/implementation/alphabets/decorated_alphabet.hxx>
# endif // VCSN_USE_INTERFACE_ONLY

#endif // ! VCSN_ALGEBRA_IMPLEMENTATION_ALPHABETS_DECORATED_ALPHABET_HH

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