Generated on Tue Jul 27 2010 21:59:15 for Gecode by doxygen 1.7.1

nq.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, 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