is_of_finite_image.hh

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// This file is part of Awali.
// Copyright 2016-2022 Sylvain Lombardy, Victor Marsault, Jacques Sakarovitch
//
// Awali is a 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 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
 
#ifndef AWALI_ALGOS_FINITE_IMAGE_HH
#define AWALI_ALGOS_FINITE_IMAGE_HH
 
#include <awali/sttc/algos/proper.hh>
#include <awali/sttc/algos/is_acyclic.hh>
#include <awali/sttc/labelset/traits.hh>
#include <awali/sttc/misc/add_epsilon_trans.hh> // is_epsilon
 
namespace awali {
  namespace sttc {
    template<unsigned I, typename Tdc>
    bool is_of_finite_image(const Tdc& tdc) {
      using labelset_t = labelset_t_of<Tdc>;
      using Ilabelset_t = typename labelset_t::template valueset_t<I>;
      auto ptdc = proper(tdc);
      for(auto tr : ptdc->transitions()) {
        if(!is_epsilon<Ilabelset_t>(std::get<I>(ptdc->label_of(tr))))
          ptdc->del_transition(tr);
      }
      return is_acyclic(ptdc);
    }
  }
}//end of ns awali::stc
 
#endif