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state.hh

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00001 // Copyright (C) 2003, 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
00002 // département Systèmes Répartis Coopératifs (SRC), Université Pierre
00003 // et Marie Curie.
00004 //
00005 // This file is part of Spot, a model checking library.
00006 //
00007 // Spot is free software; you can redistribute it and/or modify it
00008 // under the terms of the GNU General Public License as published by
00009 // the Free Software Foundation; either version 2 of the License, or
00010 // (at your option) any later version.
00011 //
00012 // Spot is distributed in the hope that it will be useful, but WITHOUT
00013 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
00014 // or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
00015 // License for more details.
00016 //
00017 // You should have received a copy of the GNU General Public License
00018 // along with Spot; see the file COPYING.  If not, write to the Free
00019 // Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
00020 // 02111-1307, USA.
00021 
00022 #ifndef SPOT_TGBA_STATE_HH
00023 # define SPOT_TGBA_STATE_HH
00024 
00025 #include <cstddef>
00026 #include <bdd.h>
00027 #include <cassert>
00028 #include <functional>
00029 
00030 namespace spot
00031 {
00032 
00035   class state
00036   {
00037   public:
00048     virtual int compare(const state* other) const = 0;
00049 
00069     virtual size_t hash() const = 0;
00070 
00072     virtual state* clone() const = 0;
00073 
00074     virtual ~state()
00075     {
00076     }
00077   };
00078 
00091   struct state_ptr_less_than:
00092     public std::binary_function<const state*, const state*, bool>
00093   {
00094     bool
00095     operator()(const state* left, const state* right) const
00096     {
00097       assert(left);
00098       return left->compare(right) < 0;
00099     }
00100   };
00101 
00115   struct state_ptr_equal:
00116     public std::binary_function<const state*, const state*, bool>
00117   {
00118     bool
00119     operator()(const state* left, const state* right) const
00120     {
00121       assert(left);
00122       return 0 == left->compare(right);
00123     }
00124   };
00125 
00140   struct state_ptr_hash:
00141     public std::unary_function<const state*, size_t>
00142   {
00143     size_t
00144     operator()(const state* that) const
00145     {
00146       assert(that);
00147       return that->hash();
00148     }
00149   };
00150 
00151 }
00152 
00153 #endif // SPOT_TGBA_STATE_HH

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