spot  0.9.1
refformula.hh
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00001 // -*- coding: utf-8 -*-
00002 // Copyright (C) 2010, 2012 Laboratoire de Recherche de Developpement
00003 // de l'EPITA (LRDE).
00004 // Copyright (C) 2003, 2004, 2005 Laboratoire d'Informatique de Paris
00005 // 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
00006 // Université Pierre et Marie Curie.
00007 //
00008 // This file is part of Spot, a model checking library.
00009 //
00010 // Spot is free software; you can redistribute it and/or modify it
00011 // under the terms of the GNU General Public License as published by
00012 // the Free Software Foundation; either version 2 of the License, or
00013 // (at your option) any later version.
00014 //
00015 // Spot is distributed in the hope that it will be useful, but WITHOUT
00016 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
00017 // or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
00018 // License for more details.
00019 //
00020 // You should have received a copy of the GNU General Public License
00021 // along with Spot; see the file COPYING.  If not, write to the Free
00022 // Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
00023 // 02111-1307, USA.
00024 
00027 #ifndef SPOT_LTLAST_REFFORMULA_HH
00028 # define SPOT_LTLAST_REFFORMULA_HH
00029 
00030 #include "formula.hh"
00031 
00032 namespace spot
00033 {
00034   namespace ltl
00035   {
00036 
00039     class ref_formula : public formula
00040     {
00041     protected:
00042       virtual ~ref_formula();
00043       ref_formula(opkind k);
00044       void ref_() const;
00045       bool unref_() const;
00047       unsigned ref_count_() const;
00048     private:
00049       mutable unsigned ref_counter_;
00050     };
00051 
00052   }
00053 }
00054 
00055 #endif // SPOT_LTLAST_REFFORMULA_HH

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