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tgba/state.hh

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00001 // Copyright (C) 2003  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 
00034   class state
00035   {
00036   public:
00047     virtual int compare(const state* other) const = 0;
00048 
00068     virtual size_t hash() const = 0;
00069 
00071     virtual state* clone() const = 0;
00072 
00073     virtual ~state()
00074     {
00075     }
00076   };
00077 
00089   struct state_ptr_less_than :
00090     public std::binary_function<const state*, const state*, bool>
00091   {
00092     bool
00093     operator()(const state* left, const state* right) const
00094     {
00095       assert(left);
00096       return left->compare(right) < 0;
00097     }
00098   };
00099 
00112   struct state_ptr_equal :
00113     public std::binary_function<const state*, const state*, bool>
00114   {
00115     bool
00116     operator()(const state* left, const state* right) const
00117     {
00118       assert(left);
00119       return 0 == left->compare(right);
00120     }
00121   };
00122 
00135   struct state_ptr_hash :
00136     public std::unary_function<const state*, size_t>
00137   {
00138     size_t
00139     operator()(const state* that) const
00140     {
00141       assert(that);
00142       return that->hash();
00143     }
00144   };
00145 
00146 }
00147 
00148 #endif // SPOT_TGBA_STATE_HH

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