var.hpp
Go to the documentation of this file.00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2008 00008 * 00009 * This file is part of Gecode, the generic constraint 00010 * development environment: 00011 * http://www.gecode.org 00012 * 00013 * Permission is hereby granted, free of charge, to any person obtaining 00014 * a copy of this software and associated documentation files (the 00015 * "Software"), to deal in the Software without restriction, including 00016 * without limitation the rights to use, copy, modify, merge, publish, 00017 * distribute, sublicense, and/or sell copies of the Software, and to 00018 * permit persons to whom the Software is furnished to do so, subject to 00019 * the following conditions: 00020 * 00021 * The above copyright notice and this permission notice shall be 00022 * included in all copies or substantial portions of the Software. 00023 * 00024 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00028 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00029 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00030 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00031 * 00032 */ 00033 00034 namespace Gecode { 00035 00040 class Var {}; 00041 00046 template<class VarImp> 00047 class VarImpVar : public Var { 00048 protected: 00050 VarImp* x; 00052 VarImpVar(void); 00054 VarImpVar(VarImp* y); 00055 public: 00057 typedef VarImp VarImpType; 00059 00060 00061 VarImp* varimp(void) const; 00063 unsigned int degree(void) const; 00065 double afc(void) const; 00067 00069 00070 00071 bool assigned(void) const; 00073 00075 00076 00077 void update(Space& home, VarImpVar<VarImp>& y); 00079 00081 00082 00083 bool same(const VarImpVar<VarImp>& y) const; 00085 bool before(const VarImpVar<VarImp>& y) const; 00087 }; 00088 00089 00090 /* 00091 * Variable: contains a pointer to a variable implementation 00092 * 00093 */ 00094 template<class VarImp> 00095 forceinline 00096 VarImpVar<VarImp>::VarImpVar(void) 00097 : x(NULL) {} 00098 template<class VarImp> 00099 forceinline 00100 VarImpVar<VarImp>::VarImpVar(VarImp* y) 00101 : x(y) {} 00102 template<class VarImp> 00103 forceinline VarImp* 00104 VarImpVar<VarImp>::varimp(void) const { 00105 return x; 00106 } 00107 template<class VarImp> 00108 forceinline unsigned int 00109 VarImpVar<VarImp>::degree(void) const { 00110 return x->degree(); 00111 } 00112 template<class VarImp> 00113 forceinline double 00114 VarImpVar<VarImp>::afc(void) const { 00115 return x->afc(); 00116 } 00117 template<class VarImp> 00118 forceinline bool 00119 VarImpVar<VarImp>::assigned(void) const { 00120 return x->assigned(); 00121 } 00122 template<class VarImp> 00123 forceinline void 00124 VarImpVar<VarImp>::update(Space& home, VarImpVar<VarImp>& y) { 00125 x = y.x->copy(home); 00126 } 00127 template<class VarImp> 00128 forceinline bool 00129 VarImpVar<VarImp>::same(const VarImpVar<VarImp>& y) const { 00130 return varimp() == y.varimp(); 00131 } 00132 template<class VarImp> 00133 forceinline bool 00134 VarImpVar<VarImp>::before(const VarImpVar<VarImp>& y) const { 00135 return varimp() < y.varimp(); 00136 } 00137 00138 } 00139 00140 // STATISTICS: kernel-var