series_base.hh

// series_base.hh: this file is part of the Vaucanson project.
//
// Vaucanson, a generic library for finite state machines.
//
// Copyright (C) 2001, 2002, 2003, 2004 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_SERIES_BASE_HH
# define VCSN_ALGEBRA_CONCEPT_SERIES_BASE_HH

# include <vaucanson/algebra/concept/semiring_base.hh>
# include <vaucanson/algebra/concept/freemonoid_base.hh>

namespace vcsn {

  namespace algebra {

    /*-----------------.
    | SeriesBase<Self> |
    `-----------------*/

    template<class Self>
    struct SeriesBase
      : SemiringBase<Self>
    {
      typedef typename virtual_types<Self>::monoid_t  monoid_t;

      typedef typename virtual_types<Self>::semiring_t semiring_t;

      const monoid_t&   monoid() const;

      const semiring_t&  semiring() const;

      monoid_t&         monoid();

      semiring_t&       semiring();

    protected:
      SeriesBase();

      SeriesBase(const SeriesBase& other);
    };

    template<typename T>
    struct series_traits
    {
      typedef undefined_type    monoid_elt_value_t;
      typedef undefined_type    semiring_elt_value_t;
    };

    template <typename T, typename W, typename M>
    struct mute_series_impl
    {
      typedef undefined_type    ret;
    };

    template <typename T, typename W, typename M>
    struct mute_series_traits
    {
      typedef undefined_type    ret;
    };

  } // algebra

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

  template<typename Self>
  struct dynamic_traits<algebra::SeriesBase<Self> >
    : dynamic_traits<algebra::SemiringBase<Self> >
  {};

  template<typename S>
  struct virtual_types<algebra::SeriesBase<S> >
    : virtual_types<algebra::SemiringBase<S> >
  {
    typedef undefined_type monoid_t;
    typedef undefined_type semiring_t;
  };

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

  template<class Self, typename T>
  class MetaElement<algebra::SeriesBase<Self>, T>
    : public MetaElement<algebra::SemiringBase<Self>, T>
  {
  public:
    typedef typename algebra::series_traits<T>::semiring_elt_value_t   semiring_elt_value_t;

    typedef typename algebra::series_traits<T>::monoid_elt_value_t    monoid_elt_value_t;

    typedef Element<typename Self::semiring_t, semiring_elt_value_t> semiring_elt_t;

    typedef Element<typename Self::monoid_t, monoid_elt_value_t>         monoid_elt_t;

    typedef Element<Self, T>                             element_t;

    typedef typename algebra::series_traits<T>::support_t       support_t;

    semiring_elt_value_t        get(const monoid_elt_value_t& m) const;

    semiring_elt_t              get(const monoid_elt_t& m) const;

    void                assoc(const monoid_elt_value_t& m,
                              const semiring_elt_value_t& w);

    void                assoc(const monoid_elt_t& m, const semiring_elt_t& w);

    bool                is_finite_app() const;

    monoid_elt_t        choose_from_supp() const;

    void                transpose();

    support_t           supp() const;

  protected:
    MetaElement();

    MetaElement(const MetaElement& other);
  };

  template <typename S, typename T>
  Element<S, T>
  transpose(const algebra::SeriesBase<S>& s, const T& t);

  template <typename S, typename T>
  bool
  is_letter_support(const Element<S, T>& s);

  template <typename S1, typename S2, typename T1, typename T2>
  void
  extract_support(Element<S1, T1>&, Element<S2, T2>&);

  template <class S, class T>
  Element<S, T> hadamard(const Element<S, T>& lhs,
                         const Element<S, T>& rhs);

  template <typename S, typename T>
  bool
  op_is_finite_app(const algebra::SeriesBase<S>& s, const T& t);

  template <typename S, typename T>
  typename MetaElement<algebra::SeriesBase<S>, T>::monoid_elt_t

  op_choose_from_supp(const algebra::SeriesBase<S>& s, const T& t);

  template <class S, class T>
  Element<S, T> op_series_choose(const algebra::SeriesBase<S>& s, SELECTOR(T));

  template <typename S, typename T, typename M, typename W>
  void
  op_series_set(const algebra::SeriesBase<S>& s, const T& t, const W& w);

  template <class S, class T>
  typename algebra::series_traits<T>::support_t
  op_support(const algebra::SeriesBase<S>&, const T& v);

  // This conversion is needed when assigning a monoid element to a series.
  template <class S, class M>
  S
  op_convert(const algebra::SeriesBase<S>&,
             const algebra::FreeMonoidBase<M>&);

  template <class S, class T>
  T op_convert(const algebra::SeriesBase<S>& s, SELECTOR(T), const T& src_);

  template <class S, class T, class U>
  T op_convert(const algebra::SeriesBase<S>&, SELECTOR(T), U& src_);

} // vcsn

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

#endif // ! VCSN_ALGEBRA_CONCEPT_SERIES_BASE_HH

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