nq.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, 2004 00008 * 00009 * Last modified: 00010 * $Date: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $ 00011 * $Revision: 10364 $ 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 { namespace Int { namespace Rel { 00039 00040 /* 00041 * Disequality 00042 * 00043 */ 00044 template<class View> 00045 forceinline 00046 Nq<View>::Nq(Home home, View x0, View x1) 00047 : BinaryPropagator<View,PC_INT_VAL>(home,x0,x1) {} 00048 00049 template<class View> 00050 ExecStatus 00051 Nq<View>::post(Home home, View x0, View x1){ 00052 if (x0.assigned()) { 00053 GECODE_ME_CHECK(x1.nq(home,x0.val())); 00054 } else if (x1.assigned()) { 00055 GECODE_ME_CHECK(x0.nq(home,x1.val())); 00056 } else if (same(x0,x1)) { 00057 return ES_FAILED; 00058 } else { 00059 (void) new (home) Nq<View>(home,x0,x1); 00060 } 00061 return ES_OK; 00062 } 00063 00064 template<class View> 00065 forceinline 00066 Nq<View>::Nq(Space& home, bool share, Nq<View>& p) 00067 : BinaryPropagator<View,PC_INT_VAL>(home,share,p) {} 00068 00069 template<class View> 00070 Actor* 00071 Nq<View>::copy(Space& home, bool share) { 00072 return new (home) Nq<View>(home,share,*this); 00073 } 00074 00075 template<class View> 00076 PropCost 00077 Nq<View>::cost(const Space&, const ModEventDelta&) const { 00078 return PropCost::unary(PropCost::LO); 00079 } 00080 00081 template<class View> 00082 ExecStatus 00083 Nq<View>::propagate(Space& home, const ModEventDelta&) { 00084 if (x0.assigned()) { 00085 GECODE_ME_CHECK(x1.nq(home,x0.val())); 00086 } else { 00087 GECODE_ME_CHECK(x0.nq(home,x1.val())); 00088 } 00089 return home.ES_SUBSUMED(*this); 00090 } 00091 00092 }}} 00093 00094 // STATISTICS: int-prop