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eqite.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, 2015
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 <algorithm>
00035 
00036 namespace Gecode { namespace Int { namespace Distinct {
00037 
00038   forceinline
00039   EqIte::EqIte(Home home, IntView x0, IntView x1, int d0, int d1)
00040     : BinaryPropagator<IntView,PC_INT_DOM>(home,x0,x1), c0(d0), c1(d1) {}
00041 
00042   forceinline
00043   EqIte::EqIte(Space& home, EqIte& p)
00044     : BinaryPropagator<IntView,PC_INT_DOM>(home,p),
00045       c0(p.c0), c1(p.c1) {}
00046 
00047 
00048   inline ExecStatus
00049   EqIte::post(Home home, IntView x0, IntView x1, int c0, int c1) {
00050     assert(!(x0.assigned() && (x0.val() == c0)) && x0.in(c0));
00051     GECODE_ME_CHECK(x1.lq(home,std::max(x0.max(),c1)));
00052     GECODE_ME_CHECK(x1.gq(home,std::min(x0.min(),c1)));
00053     (void) new (home) EqIte(home,x0,x1,c0,c1);
00054     return ES_OK;
00055   }
00056 
00057 }}}
00058 
00059 // STATISTICS: int-prop