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relax.cpp

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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, 2016
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 #include <gecode/int.hh>
00035 #include <gecode/search/relax.hh>
00036 
00037 namespace Gecode { namespace Int {
00038 
00040   class Relax {
00041   public:
00043     ExecStatus operator ()(Home home, IntVar x, IntVar sx);
00045     ExecStatus operator ()(Home home, BoolVar x, BoolVar sx);
00046   };
00047 
00048   forceinline ExecStatus
00049   Relax::operator ()(Home home, IntVar x, IntVar sx) {
00050     IntView xv(x);
00051     return me_failed(xv.eq(home,sx.val())) ? ES_FAILED : ES_OK;
00052   }
00053 
00054   forceinline ExecStatus
00055   Relax::operator ()(Home home, BoolVar x, BoolVar sx) {
00056     BoolView xv(x);
00057     return me_failed(xv.eq(home,sx.val())) ? ES_FAILED : ES_OK;
00058   }
00059 
00060 }}
00061 
00062 namespace Gecode {
00063 
00064   void
00065   relax(Home home, const IntVarArgs& x, const IntVarArgs& sx,
00066         Rnd r, double p) {
00067     if (x.size() != sx.size())
00068       throw Int::ArgumentSizeMismatch("Int::relax");
00069     if ((p < 0.0) || (p > 1.0))
00070       throw Int::OutOfLimits("Int::relax");
00071     Int::Relax ir;
00072     Search::relax<IntVarArgs,Int::Relax>(home,x,sx,r,p,ir);
00073   }
00074 
00075   void
00076   relax(Home home, const BoolVarArgs& x, const BoolVarArgs& sx,
00077         Rnd r, double p) {
00078     if (x.size() != sx.size())
00079       throw Int::ArgumentSizeMismatch("Int::relax");
00080     if ((p < 0.0) || (p > 1.0))
00081       throw Int::OutOfLimits("Int::relax");
00082     Int::Relax ir;
00083     Search::relax<BoolVarArgs,Int::Relax>(home,x,sx,r,p,ir);
00084   }
00085 
00086 }
00087 
00088 // STATISTICS: int-other
00089