krat_exp_constant_term.hh

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00001 // krat_exp_constant_term.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 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_ALGORITHMS_KRAT_EXP_CONSTANT_TERM_HH
00018 # define VCSN_ALGORITHMS_KRAT_EXP_CONSTANT_TERM_HH
00019 
00030 # include <vaucanson/design_pattern/design_pattern.hh>
00031 # include <utility>
00032 
00033 namespace vcsn {
00034 
00037 
00038   template <class Series, class T>
00039   std::pair<typename Element<Series, T>::semiring_elt_t, bool>
00040   constant_term(const Element<Series, T>& exp);
00041 
00044 } // vcsn
00045 
00046 # ifndef VCSN_USE_INTERFACE_ONLY
00047 #  include <vaucanson/algorithms/krat_exp_constant_term.hxx>
00048 # endif // VCSN_USE_INTERFACE_ONLY
00049 
00050 #endif // ! VCSN_ALGORITHMS_KRAT_EXP_CONSTANT_TERM_HH

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