/*
 *  Main authors:
 *     Guido Tack <tack@gecode.org>
 *
 *  Copyright:
 *     Guido Tack, 2004, 2005
 *
 *  Last modified:
 *     $Date: 2006-05-29 09:42:21 +0200 (Mon, 29 May 2006) $ by $Author: schulte $
 *     $Revision: 3246 $
 *
 *  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 {

  /**
   * \defgroup TaskPropSetPat Patterns for set propagators
   *
   * The optional last Boolean argument to the constructor for creation
   * defines whether deletion must be forced.
   * \ingroup TaskActor
   */

  //@{


  /**
   * \brief Set/Int connection propagator
   *
   * Stores single view of type \a View with propagation condition \a pcs
   * and an integer variable with propagation condition \a pci.
   */
  template <class View, PropCond pcs, PropCond pci>
  class IntSetPropagator : public Propagator {
  protected:
    View x0;
    Gecode::Int::IntView x1;
    /// Constructor for cloning
    IntSetPropagator(Space* home,bool,IntSetPropagator&);
    /// Constructor for creation
    IntSetPropagator(Space* home,View,Gecode::Int::IntView,bool=false);
  public:
    /// Cost function (defined as PC_BINARY_LO)
    virtual PropCost cost(void) const;
    /// Delete propagator and return its size
    virtual size_t dispose(Space* home);
  };

  //@}

  template <class View, PropCond pcs, PropCond pci>
  IntSetPropagator<View,pcs,pci>::IntSetPropagator
  (Space* home, View y0, Gecode::Int::IntView y1, bool fd)
    : Propagator(home,fd), x0(y0), x1(y1) {
    x0.subscribe(home,this,pcs);
    x1.subscribe(home,this,pci);
  }

  template <class View, PropCond pcs, PropCond pci>
  forceinline
  IntSetPropagator<View,pcs,pci>::IntSetPropagator
  (Space* home, bool share, IntSetPropagator<View,pcs,pci>& p)
    : Propagator(home,share,p) {
    x0.update(home,share,p.x0);
    x1.update(home,share,p.x1);
  }

  template <class View, PropCond pcs, PropCond pci>
  PropCost
  IntSetPropagator<View,pcs,pci>::cost(void) const {
    return PC_BINARY_LO;
  }

  template <class View, PropCond pcs, PropCond pci>
  size_t
  IntSetPropagator<View,pcs,pci>::dispose(Space* home) {
    if (!home->failed()) {
      x0.cancel(home,this,pcs);
      x1.cancel(home,this,pci);
    }
    (void) Propagator::dispose(home);
    return sizeof(*this);
  }

}

// STATISTICS: set-prop