Jip J. Dekker
1d9faf38de
git-subtree-dir: software/gecode git-subtree-split: 313e87646da4fc2752a70e83df16d993121a8e40
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Guido Tack <tack@gecode.org>
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* Christian Schulte <schulte@gecode.org>
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* Gabor Szokoli <szokoli@gecode.org>
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*
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* Copyright:
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* Guido Tack, 2004
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* Christian Schulte, 2004
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* Gabor Szokoli, 2004
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace Gecode { namespace Set { namespace Rel {
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/*
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* "No Subset" propagator
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*
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*/
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template<class View0, class View1>
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forceinline
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NoSubset<View0,View1>::NoSubset(Home home, View0 y0, View1 y1)
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: MixBinaryPropagator<View0,PC_SET_CLUB,
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View1,PC_SET_CGLB>(home,y0,y1) {}
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template<class View0, class View1>
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forceinline
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NoSubset<View0,View1>::NoSubset(Space& home, NoSubset<View0,View1>& p)
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: MixBinaryPropagator<View0,PC_SET_CLUB,
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View1,PC_SET_CGLB>(home,p) {}
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template<class View0, class View1>
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ExecStatus
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NoSubset<View0,View1>::post(Home home, View0 x, View1 y) {
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if (same(x,y))
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return ES_FAILED;
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if (me_failed(x.cardMin(home,1)))
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return ES_FAILED;
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(void) new (home) NoSubset<View0,View1>(home,x,y);
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return ES_OK;
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}
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template<class View0, class View1>
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Actor*
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NoSubset<View0,View1>::copy(Space& home) {
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return new (home) NoSubset<View0,View1>(home,*this);
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}
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template<class View0, class View1>
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ExecStatus
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NoSubset<View0,View1>::propagate(Space& home, const ModEventDelta&) {
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GlbRanges<View0> x0lb(x0);
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LubRanges<View1> x1ub(x1);
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if (!Iter::Ranges::subset(x0lb, x1ub))
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return home.ES_SUBSUMED(*this);
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if (x0.cardMin()>x1.cardMax()) { return home.ES_SUBSUMED(*this); }
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LubRanges<View0> x0ub(x0);
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GlbRanges<View1> x1lb(x1);
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Iter::Ranges::Diff<LubRanges<View0>,GlbRanges<View1> >
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breakers(x0ub,x1lb);
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if (!breakers()) { return ES_FAILED; }
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if (breakers.min() == breakers.max()) {
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int b1 = breakers.min();
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++breakers;
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if (breakers()) { return ES_FIX; }
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//Only one subsetness-breaker element left:
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GECODE_ME_CHECK( x0.include(home,b1) );
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GECODE_ME_CHECK( x1.exclude(home,b1) );
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return home.ES_SUBSUMED(*this);
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}
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return ES_FIX;
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}
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}}}
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// STATISTICS: set-prop
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