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# exp.hh

    00001 // exp.hh: this file is part of the Vaucanson project.
    00002 //
    00003 // Vaucanson, a generic library for finite state machines.
    00004 //
    00005 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 The Vaucanson Group.
    00006 //
    00007 // This program is free software; you can redistribute it and/or
    00008 // modify it under the terms of the GNU General Public License
    00009 // as published by the Free Software Foundation; either version 2
    00010 // of the License, or (at your option) any later version.
    00011 //
    00012 // The complete GNU General Public Licence Notice can be found as the
    00013 // `COPYING' file in the root directory.
    00014 //
    00015 // The Vaucanson Group consists of people listed in the `AUTHORS' file.
    00016 //
    00017 #ifndef VCSN_ALGEBRA_IMPLEMENTATION_SERIES_RAT_EXP_HH
    00018 # define VCSN_ALGEBRA_IMPLEMENTATION_SERIES_RAT_EXP_HH
    00019
    00020 # include <vaucanson/algebra/implementation/series/rat/nodes.hh>
    00021 # include <vaucanson/design_pattern/element.hh>
    00022
    00023 namespace vcsn {
    00024
    00025   namespace rat {
    00026
    00028     template<typename LetterT, typename WeightT>
    00029     class exp
    00030     {
    00031     public:
    00032       typedef rat::Node<LetterT, WeightT>                       node_t;
    00033       typedef typename rat::Node<LetterT, WeightT>::type        type;
    00034       typedef rat::Zero<LetterT, WeightT>                       n_zero_t;
    00035       typedef rat::One<LetterT, WeightT>                        n_one_t;
    00036       typedef rat::Sum<LetterT, WeightT>                        n_sum_t;
    00037       typedef rat::Product<LetterT, WeightT>                    n_prod_t;
    00038       typedef rat::Star<LetterT, WeightT>                       n_star_t;
    00039       typedef rat::Constant<LetterT, WeightT>                   n_const_t;
    00040
    00041     public:
    00042       typedef LetterT monoid_elt_value_t;
    00043       typedef WeightT semiring_elt_value_t;
    00044
    00046
    00047       exp();
    00048       exp(node_t* p);
    00049       exp(const node_t* p);
    00050       exp(const exp& other);
    00052
    00054       ~exp();
    00055
    00057
    00058       exp& operator = (const exp& other);
    00059       exp& operator += (const exp& other);
    00060       exp& operator *= (const exp& other);
    00062
    00064       exp& star();
    00065
    00067       exp& swap(exp& otether);
    00068
    00070       void
    00071       accept(ConstNodeVisitor<monoid_elt_value_t, semiring_elt_value_t>& v)
    00072         const;
    00073
    00075       size_t depth() const;
    00076
    00085       size_t star_height() const;
    00086
    00089       size_t length() const;
    00090
    00092
    00093       node_t*           &base();
    00094       node_t* const     &base() const;
    00096
    00098
    00099       bool operator == (const exp& other) const;
    00100       bool operator != (const exp& other) const;
    00101       bool operator < (const exp& other) const;
    00103
    00105       exp clone() const;
    00106
    00108
    00109       static exp one();
    00110       static exp zero();
    00111       static exp constant(const monoid_elt_value_t& l);
    00113
    00115       static bool starable();
    00116
    00117     protected:
    00119       node_t *base_;
    00120     };
    00121
    00122     template<typename M, typename W>
    00123     const exp<M, W> operator*(const exp<M, W>& lhs,
    00124                               const exp<M, W>& rhs);
    00125
    00126     template<typename M, typename W>
    00127     exp<M, W> operator+(const exp<M, W>& lhs,
    00128                         const exp<M, W>& rhs);
    00129
    00130     template<typename M, typename W>
    00131     exp<M, W> operator*(const W& lhs,
    00132                         const exp<M, W>& rhs);
    00133
    00134     template<typename M, typename W>
    00135     exp<M, W> operator*(const exp<M, W>& lhs,
    00136                         const W& rhs);
    00137
    00138     // FIXME: This is an *evil* hack, but without it there is an ambiguity
    00139     // FIXME: in calls to exp * number or number * exp.
    00140
    00141     template<typename M, typename S, typename T>
    00142     exp<M, Element<S, T> >
    00143     operator*(const Element<S, T>& lhs,
    00144               const exp<M, Element<S, T> >& rhs);
    00145
    00146     template<typename M, typename S, typename T>
    00147     exp<M, Element<S, T> >
    00148     operator*(const exp<M, Element<S, T> >& lhs,
    00149               const Element<S, T>& rhs);
    00150
    00151     template<typename M, typename W>
    00152     void swap(vcsn::rat::exp<M, W>& lhs,
    00153               vcsn::rat::exp<M, W>& rhs);
    00154
    00155   } // End of namespace rat.
    00156
    00157 } // End of namespace vcsn.
    00158
    00159 # if !defined VCSN_USE_INTERFACE_ONLY || defined VCSN_USE_LIB
    00160 #  include <vaucanson/algebra/implementation/series/rat/exp.hxx>
    00161 # endif // VCSN_USE_INTERFACE_ONLY
    00162
    00163 #endif // ! VCSN_ALGEBRA_IMPLEMENTATION_SERIES_RAT_EXP_HH