link-single.cpp
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, 2007 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 #include <gecode/int/channel.hh> 00039 00040 namespace Gecode { namespace Int { namespace Channel { 00041 00042 forceinline 00043 LinkSingle::LinkSingle(Space& home, bool share, LinkSingle& p) 00044 : MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL> 00045 (home,share,p) {} 00046 00047 Actor* 00048 LinkSingle::copy(Space& home, bool share) { 00049 return new (home) LinkSingle(home,share,*this); 00050 } 00051 00052 PropCost 00053 LinkSingle::cost(const Space&, const ModEventDelta&) const { 00054 return PropCost::unary(PropCost::LO); 00055 } 00056 00057 ExecStatus 00058 LinkSingle::propagate(Space& home, const ModEventDelta&) { 00059 if (x0.zero()) { 00060 GECODE_ME_CHECK(x1.eq(home,0)); 00061 } else if (x0.one()) { 00062 GECODE_ME_CHECK(x1.eq(home,1)); 00063 } else { 00064 assert(x0.none() && x1.assigned()); 00065 if (x1.val() == 0) { 00066 GECODE_ME_CHECK(x0.zero_none(home)); 00067 } else { 00068 assert(x1.val() == 1); 00069 GECODE_ME_CHECK(x0.one_none(home)); 00070 } 00071 } 00072 return home.ES_SUBSUMED(*this); 00073 } 00074 00075 }}} 00076 00077 // STATISTICS: int-prop