brancher-val.hpp
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main author: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2008 00008 * 00009 * Last modified: 00010 * $Date: 2009-09-08 21:10:29 +0200 (Tue, 08 Sep 2009) $ by $Author: schulte $ 00011 * $Revision: 9692 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 namespace Gecode { 00039 00046 00047 class EmptyValSelChoice { 00048 public: 00050 size_t size(void) const; 00051 }; 00052 00058 template<class _View, class _Val> 00059 class ValSelBase { 00060 public: 00062 typedef _View View; 00064 typedef _Val Val; 00066 typedef EmptyValSelChoice Choice; 00068 static const unsigned int alternatives = 2; 00070 ValSelBase(void); 00072 ValSelBase(Space& home, const ValBranchOptions& vbo); 00074 EmptyValSelChoice choice(Space& home); 00076 void commit(Space& home, const EmptyValSelChoice& c, unsigned a); 00078 void update(Space& home, bool share, ValSelBase& vs); 00080 void dispose(Space& home); 00081 }; 00083 00084 00085 // Empty value selection choice 00086 forceinline size_t 00087 EmptyValSelChoice::size(void) const { 00088 return sizeof(EmptyValSelChoice); 00089 } 00090 00091 // Value selection base class 00092 template<class View, class Val> 00093 forceinline 00094 ValSelBase<View,Val>::ValSelBase(void) {} 00095 template<class View, class Val> 00096 forceinline 00097 ValSelBase<View,Val>::ValSelBase(Space&, const ValBranchOptions&) {} 00098 template<class View, class Val> 00099 forceinline EmptyValSelChoice 00100 ValSelBase<View,Val>::choice(Space&) { 00101 EmptyValSelChoice c; return c; 00102 } 00103 template<class View, class Val> 00104 forceinline void 00105 ValSelBase<View,Val>::commit(Space&, const EmptyValSelChoice&, unsigned int) {} 00106 template<class View, class Val> 00107 forceinline void 00108 ValSelBase<View,Val>::update(Space&, bool, ValSelBase<View,Val>&) {} 00109 template<class View, class Val> 00110 forceinline void 00111 ValSelBase<View,Val>::dispose(Space&) {} 00112 00113 } 00114 00115 // STATISTICS: kernel-branch