eq.hpp
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Guido Tack <tack@gecode.org> 00005 * Christian Schulte <schulte@gecode.org> 00006 * 00007 * Contributing authors: 00008 * Gabor Szokoli <szokoli@gecode.org> 00009 * 00010 * Copyright: 00011 * Guido Tack, 2004 00012 * Christian Schulte, 2004 00013 * Gabor Szokoli, 2004 00014 * 00015 * Last modified: 00016 * $Date: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $ 00017 * $Revision: 10364 $ 00018 * 00019 * This file is part of Gecode, the generic constraint 00020 * development environment: 00021 * http://www.gecode.org 00022 * 00023 * Permission is hereby granted, free of charge, to any person obtaining 00024 * a copy of this software and associated documentation files (the 00025 * "Software"), to deal in the Software without restriction, including 00026 * without limitation the rights to use, copy, modify, merge, publish, 00027 * distribute, sublicense, and/or sell copies of the Software, and to 00028 * permit persons to whom the Software is furnished to do so, subject to 00029 * the following conditions: 00030 * 00031 * The above copyright notice and this permission notice shall be 00032 * included in all copies or substantial portions of the Software. 00033 * 00034 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00035 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00036 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00037 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00038 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00039 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00040 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00041 * 00042 */ 00043 00044 namespace Gecode { namespace Set { namespace Rel { 00045 00046 template<class View0, class View1> 00047 forceinline 00048 Eq<View0,View1>::Eq(Home home, View0 x, View1 y) 00049 : MixBinaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY>(home,x,y) {} 00050 00051 template<class View0, class View1> 00052 forceinline 00053 Eq<View0,View1>::Eq(Space& home, bool share, Eq& p) 00054 : MixBinaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY>(home,share,p) {} 00055 00056 template<class View0, class View1> 00057 ExecStatus 00058 Eq<View0,View1>::post(Home home, View0 x, View1 y) { 00059 (void) new (home) Eq(home,x,y); 00060 return ES_OK; 00061 } 00062 00063 template<class View0, class View1> 00064 Actor* 00065 Eq<View0,View1>::copy(Space& home, bool share) { 00066 return new (home) Eq(home,share,*this); 00067 } 00068 00069 template<class View0, class View1> 00070 ExecStatus 00071 Eq<View0,View1>::propagate(Space& home, const ModEventDelta& med) { 00072 00073 ModEvent me0 = View0::me(med); 00074 ModEvent me1 = View1::me(med); 00075 00076 if ( testSetEventLB(me0,me1) ) { 00077 GlbRanges<View0> x0lb(x0); 00078 GlbRanges<View1> x1lb(x1); 00079 Iter::Ranges::Union<GlbRanges<View0>,GlbRanges<View1> > lbu(x0lb,x1lb); 00080 Iter::Ranges::Cache<Iter::Ranges::Union 00081 <GlbRanges<View0>, GlbRanges<View1> > > lbuc(lbu); 00082 GECODE_ME_CHECK ( x0.includeI(home,lbuc) ); 00083 lbuc.reset(); 00084 GECODE_ME_CHECK ( x1.includeI(home,lbuc) ); 00085 } 00086 00087 if (testSetEventUB(me0,me1) ) { 00088 LubRanges<View0> x0ub(x0); 00089 LubRanges<View1> x1ub(x1); 00090 Iter::Ranges::Inter<LubRanges<View0>,LubRanges<View1> > ubi(x0ub,x1ub); 00091 Iter::Ranges::Cache<Iter::Ranges::Inter 00092 <LubRanges<View0>,LubRanges<View1> > > ubic(ubi); 00093 GECODE_ME_CHECK ( x0.intersectI(home,ubic) ); 00094 ubic.reset(); 00095 GECODE_ME_CHECK ( x1.intersectI(home,ubic) ); 00096 } 00097 00098 if (testSetEventCard(me0,me1) ) { 00099 unsigned int max = std::min(x0.cardMax(),x1.cardMax()); 00100 unsigned int min = std::max(x0.cardMin(),x1.cardMin()); 00101 GECODE_ME_CHECK ( x0.cardMax(home,max) ); 00102 GECODE_ME_CHECK ( x1.cardMax(home,max) ); 00103 GECODE_ME_CHECK ( x0.cardMin(home,min) ); 00104 GECODE_ME_CHECK ( x1.cardMin(home,min) ); 00105 } 00106 00107 if (x0.assigned()) { 00108 assert (x1.assigned()); 00109 return home.ES_SUBSUMED(*this); 00110 } 00111 return shared(x0,x1) ? ES_NOFIX : ES_FIX; 00112 } 00113 00114 }}} 00115 00116 // STATISTICS: set-prop