1 /* 2 3 This file is part of the Maude 2 interpreter. 4 5 Copyright 1997-2013 SRI International, Menlo Park, CA 94025, USA. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 20 21 */ 22 23 // 24 // Class for standard strategy nullary symbols belonging to the free theory. 25 // Sole purpose of this class is to provide a DagRoot for caching a dagified version. 26 // 27 #ifndef _freeNullarySymbol_hh_ 28 #define _freeNullarySymbol_hh_ 29 #include "freeSymbol.hh" 30 #include "dagRoot.hh" 31 32 class FreeNullarySymbol : public FreeSymbol, public DagRoot 33 { 34 public: 35 FreeNullarySymbol(int id); 36 37 bool eqRewrite(DagNode* subject, RewritingContext& context); 38 void reset(); 39 40 private: 41 DagRoot cached; 42 }; 43 44 #endif 45