var.hpp
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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 * Last modified: 00010 * $Date: 2010-06-30 14:31:56 +0200 (Wed, 30 Jun 2010) $ by $Author: schulte $ 00011 * $Revision: 11134 $ 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 00044 template<class VarImp> 00045 class Var { 00046 protected: 00048 VarImp* x; 00050 Var(void); 00052 Var(VarImp* y); 00053 public: 00055 00056 00057 VarImp* varimp(void) const; 00059 unsigned int degree(void) const; 00061 double afc(void) const; 00063 00065 00066 00067 bool assigned(void) const; 00069 00071 00072 00073 void update(Space& home, bool share, Var<VarImp>& y); 00075 00077 00078 00079 bool same(const Var<VarImp>& y) const; 00081 bool before(const Var<VarImp>& y) const; 00083 }; 00084 00085 00086 /* 00087 * Variable: contains a pointer to a variable implementation 00088 * 00089 */ 00090 template<class VarImp> 00091 forceinline 00092 Var<VarImp>::Var(void) 00093 : x(NULL) {} 00094 template<class VarImp> 00095 forceinline 00096 Var<VarImp>::Var(VarImp* y) 00097 : x(y) {} 00098 template<class VarImp> 00099 forceinline VarImp* 00100 Var<VarImp>::varimp(void) const { 00101 return x; 00102 } 00103 template<class VarImp> 00104 forceinline unsigned int 00105 Var<VarImp>::degree(void) const { 00106 return x->degree(); 00107 } 00108 template<class VarImp> 00109 forceinline double 00110 Var<VarImp>::afc(void) const { 00111 return x->afc(); 00112 } 00113 template<class VarImp> 00114 forceinline bool 00115 Var<VarImp>::assigned(void) const { 00116 return x->assigned(); 00117 } 00118 template<class VarImp> 00119 forceinline void 00120 Var<VarImp>::update(Space& home, bool share, Var<VarImp>& y) { 00121 x = y.x->copy(home,share); 00122 } 00123 template<class VarImp> 00124 forceinline bool 00125 Var<VarImp>::same(const Var<VarImp>& y) const { 00126 return varimp() == y.varimp(); 00127 } 00128 template<class VarImp> 00129 forceinline bool 00130 Var<VarImp>::before(const Var<VarImp>& y) const { 00131 return varimp() < y.varimp(); 00132 } 00133 00134 } 00135 00136 // STATISTICS: kernel-var