/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Contributing authors:
 *     Gabor Szokoli <szokoli@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2004
 *     Christian Schulte, 2004
 *     Gabor Szokoli, 2004
 *
 *  Last modified:
 *     $Date: 2005-11-15 17:40:47 +0100 (Tue, 15 Nov 2005) $ by $Author: tack $
 *     $Revision: 2576 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  See the file "LICENSE" for information on usage and
 *  redistribution of this file, and for a
 *     DISCLAIMER OF ALL WARRANTIES.
 *
 */

namespace Gecode { namespace Set { namespace Rel {

  template <class View0, class View1>
  forceinline
  SubSet<View0,View1>::SubSet(Space* home, View0 y0, View1 y1)
    : InhomBinaryPropagator<View0,PC_SET_CGLB,
			    View1,PC_SET_CLUB>(home,y0,y1) {}

  template <class View0, class View1>
  forceinline
  SubSet<View0,View1>::SubSet(Space* home, bool share, SubSet& p)
    : InhomBinaryPropagator<View0,PC_SET_CGLB,
			    View1,PC_SET_CLUB>(home,share,p) {}

  template <class View0, class View1>
  ExecStatus SubSet<View0,View1>::post(Space* home, View0 x, View1 y) {
    (void) new (home) SubSet(home,x,y);
    return ES_OK;
  }

  template <class View0, class View1>
  Actor*
  SubSet<View0,View1>::copy(Space* home, bool share) {
    return new (home) SubSet(home,share,*this);
  }

  template <class View0, class View1>
  ExecStatus
  SubSet<View0,View1>::propagate(Space* home) {
    bool oneassigned = x0.assigned() || x1.assigned();
    unsigned int x0glbsize;
    do {
      GlbRanges<View0> x0lb(x0);
      GECODE_ME_CHECK ( x1.includeI(home,x0lb) );
      GECODE_ME_CHECK ( x1.cardMin(home,x0.cardMin()) );
      LubRanges<View1> x1ub(x1);
      x0glbsize = x0.glbSize();
      GECODE_ME_CHECK ( x0.intersectI(home,x1ub) );
      GECODE_ME_CHECK ( x0.cardMax(home,x1.cardMax()) );
    } while (x0.glbSize() > x0glbsize);
    if (x0.cardMin()==x1.cardMax()) {
      GECODE_ES_CHECK((Eq<View0,View1>::post(home,x0,x1)));
      return ES_SUBSUMED;
    }
    if (shared(x0,x1)) {
      return oneassigned ? ES_SUBSUMED : ES_NOFIX;
    }
    return (x0.assigned() || x1.assigned()) ? ES_SUBSUMED : ES_FIX;
  }

}}}

// STATISTICS: set-prop