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seq-u.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *     Christian Schulte <schulte@gecode.org>
00006  *
00007  *  Contributing authors:
00008  *     Gabor Szokoli <szokoli@gecode.org>
00009  *
00010  *  Copyright:
00011  *     Guido Tack, 2004
00012  *     Christian Schulte, 2004
00013  *     Gabor Szokoli, 2004
00014  *
00015  *  Last modified:
00016  *     $Date: 2009-10-12 17:36:53 +0200 (Mon, 12 Oct 2009) $ by $Author: schulte $
00017  *     $Revision: 9878 $
00018  *
00019  *  This file is part of Gecode, the generic constraint
00020  *  development environment:
00021  *     http://www.gecode.org
00022  *
00023  *  Permission is hereby granted, free of charge, to any person obtaining
00024  *  a copy of this software and associated documentation files (the
00025  *  "Software"), to deal in the Software without restriction, including
00026  *  without limitation the rights to use, copy, modify, merge, publish,
00027  *  distribute, sublicense, and/or sell copies of the Software, and to
00028  *  permit persons to whom the Software is furnished to do so, subject to
00029  *  the following conditions:
00030  *
00031  *  The above copyright notice and this permission notice shall be
00032  *  included in all copies or substantial portions of the Software.
00033  *
00034  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00035  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00036  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00037  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00038  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00039  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00040  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00041  *
00042  */
00043 
00044 namespace Gecode { namespace Set { namespace Sequence {
00045 
00046   /*
00047    * "Sequenced union" propagator
00048    *
00049    */
00050 
00051   forceinline
00052   SeqU::SeqU(Home home, ViewArray<SetView>& x, SetView y)
00053     : NaryOnePropagator<SetView,PC_SET_ANY>(home,x, y) {}
00054 
00055   forceinline
00056   SeqU::SeqU(Space& home, bool share, SeqU& p)
00057     : NaryOnePropagator<SetView,PC_SET_ANY>(home,share,p) {
00058     unionOfDets.update(home, p.unionOfDets);
00059   }
00060 
00061   forceinline ExecStatus
00062   SeqU::post(Home home, ViewArray<SetView> x, SetView y) {
00063     switch (x.size()) {
00064     case 0:
00065       GECODE_ME_CHECK(y.cardMax(home, 0));
00066       return ES_OK;
00067     case 1:
00068       return Rel::Eq<SetView,SetView>::post(home, x[0], y);
00069     default:
00070       if (x.shared(home) || x.shared(home,y))
00071         return ES_FAILED;
00072       (void) new (home) SeqU(home,x,y);
00073       return ES_OK;
00074     }
00075   }
00076 
00077 }}}
00078 
00079 // STATISTICS: set-prop