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refformula.hh
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1 // -*- coding: utf-8 -*-
2 // Copyright (C) 2010, 2012, 2013 Laboratoire de Recherche de
3 // Développement de l'EPITA (LRDE).
4 // Copyright (C) 2003, 2004, 2005 Laboratoire d'Informatique de Paris
5 // 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
6 // Université Pierre et Marie Curie.
7 //
8 // This file is part of Spot, a model checking library.
9 //
10 // Spot is free software; you can redistribute it and/or modify it
11 // under the terms of the GNU General Public License as published by
12 // the Free Software Foundation; either version 3 of the License, or
13 // (at your option) any later version.
14 //
15 // Spot is distributed in the hope that it will be useful, but WITHOUT
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17 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
18 // License for more details.
19 //
20 // You should have received a copy of the GNU General Public License
21 // along with this program. If not, see <http://www.gnu.org/licenses/>.
22 
25 #ifndef SPOT_LTLAST_REFFORMULA_HH
26 # define SPOT_LTLAST_REFFORMULA_HH
27 
28 #include "formula.hh"
29 
30 namespace spot
31 {
32  namespace ltl
33  {
34 
37  class SPOT_API ref_formula : public formula
38  {
39  protected:
40  virtual ~ref_formula();
42  void ref_() const;
43  bool unref_() const;
45  unsigned ref_count_() const;
46  private:
47  mutable unsigned ref_counter_;
48  };
49 
50  }
51 }
52 
53 #endif // SPOT_LTLAST_REFFORMULA_HH

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