fmp_transducer_functions.thxx 4.74 KB
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// fmp_transducer_functions.thxx: this file is part of the Vaucanson project.
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// 
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// Vaucanson, a generic library for finite state machines.
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// 
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// Copyright (C) 2005 The Vaucanson Group.
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// 
// 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
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// `COPYING' file in the root directory.
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// 
// The Vaucanson Group consists of people listed in the `AUTHORS' file.
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//
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# include <vaucanson/algorithms/evaluation_fmp.hh>
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# include <vaucanson/algorithms/minimization_hopcroft.hh>
# include <vaucanson/algorithms/aut_to_exp.hh>
# include <vaucanson/algorithms/trim.hh>
# include <vaucanson/algorithms/realtime.hh>
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namespace vcsn
{
  namespace VCSN_CONTEXT_NAMESPACE
  {

    template <class FirstInputIterator, class SecondInputIterator>
    automata_set_t new_automata_set(const FirstInputIterator first_begin,
				    const FirstInputIterator first_end,
				    const SecondInputIterator second_begin,
				    const SecondInputIterator second_end)
    {
      first_alphabet_t		first_alpha;
      for (FirstInputIterator e = first_begin; e != first_end; ++e)
	first_alpha.insert(*e);

      second_alphabet_t		second_alpha;
      for (SecondInputIterator e = second_begin; e != second_end; ++e)
	second_alpha.insert(*e);

      semiring_t		semiring;
      monoid_t			freemonoidproduct (first_alpha, second_alpha);
      series_set_t		series (semiring, freemonoidproduct);
      return automata_set_t	(series);
    }


    template <class FirstInputIterator, class SecondInputIterator>
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    automaton_t make_automaton(const FirstInputIterator first_begin,
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			      const FirstInputIterator first_end,
			      const SecondInputIterator second_begin,
			      const SecondInputIterator second_end)
    {
      return automaton_t (new_automata_set(first_begin, first_end,
					   second_begin, second_end));
    }

    template <class T1, class T2>
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    automaton_t make_automaton(const T1& first_alphabet,
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			      const T2& second_alphabet)
    {
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      return make_automaton(first_alphabet.begin(), first_alphabet.end(),
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			   second_alphabet.begin(), second_alphabet.end());
    }

    template <class FirstIterator, class SecondIterator>
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    monoid_elt_t make_couple(const FirstIterator first_begin,
			     const FirstIterator first_end,
			     const SecondIterator second_begin,
			     const SecondIterator second_end,
			     const std::string& first_exp,
			     const std::string& second_exp)
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    {
      first_alphabet_t		first_alpha;
      for (FirstIterator e = first_begin; e != first_end; ++e)
	first_alpha.insert(*e);

      second_alphabet_t		second_alpha;
      for (SecondIterator e = second_begin; e != second_end; ++e)
	second_alpha.insert(*e);

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      monoid_t			fmp (first_alpha, second_alpha);
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      monoid_elt_value_t	fmp_elt_value (first_exp, second_exp);
      return Element<monoid_t, monoid_elt_value_t> (fmp, fmp_elt_value);
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    }

    template <class T1, class T2>
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    monoid_elt_t make_couple(const T1& first_alphabet,
			     const T2& second_alphabet,
			     const std::string& first_exp,
			     const std::string& second_exp)
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    {
      return make_couple(first_alphabet.begin(), first_alphabet.end(),
			 second_alphabet.begin(), second_alphabet.end(),
			 first_exp, second_exp);
    }

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    template <typename TransStruct,
	      typename TransImpl,
	      typename SeriesStruct,
	      typename SeriesImpl,
	      typename S,
	      typename T>
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    AUTOMATON_CONTEXT::rat_exp_t
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    do_evaluation(const vcsn::AutomataBase<TransStruct>&,
		  const TransImpl&,
		  const SeriesStruct&,
		  const vcsn::rat::exp<S, T>& input,
		  const Element<TransStruct, TransImpl>& t,
		  const Element<SeriesStruct, SeriesImpl>&)
    {
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      AUTOMATON_CONTEXT::automaton_t w = AUTOMATON_CONTEXT::
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	make_automaton(t.structure().series()
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		      .monoid().first_monoid().alphabet());
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      AUTOMATON_CONTEXT::automaton_t result = AUTOMATON_CONTEXT::
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	make_automaton(t.structure().series()
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		      .monoid().second_monoid().alphabet());
      standard_of(w, input);
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      evaluation_fmp(t, quotient(w), result);
      return aut_to_exp(generalized(quotient(realtime(trim(result)))),
			DMChooser());
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    }


    template <typename TransStruct,
	      typename TransImpl,
	      typename ArgStruct,
	      typename ArgImpl>
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    AUTOMATON_CONTEXT::rat_exp_t
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    evaluation(const Element<TransStruct, TransImpl>& t,
	       const Element<ArgStruct, ArgImpl>& input)
    {
      return do_evaluation(t.structure(), t.value(),
			   input.structure(), input.value(),
			   t, input);
    }


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  } // End of namespace VCSN_CONTEXT_NAMESPACE.
} // End of namespace vcsn.
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