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subset.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Guido Tack <tack@gecode.org>
5  * Christian Schulte <schulte@gecode.org>
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7  * Contributing authors:
8  * Gabor Szokoli <szokoli@gecode.org>
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10  * Copyright:
11  * Guido Tack, 2004
12  * Christian Schulte, 2004
13  * Gabor Szokoli, 2004
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15  * Last modified:
16  * $Date: 2010-03-04 03:32:21 +1100 (Thu, 04 Mar 2010) $ by $Author: schulte $
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43 
44 namespace Gecode { namespace Set { namespace Rel {
45 
46  template<class View0, class View1>
48  Subset<View0,View1>::Subset(Home home, View0 y0, View1 y1)
50  View1,PC_SET_CLUB>(home,y0,y1) {}
51 
52  template<class View0, class View1>
54  Subset<View0,View1>::Subset(Space& home, bool share, Subset& p)
56  View1,PC_SET_CLUB>(home,share,p) {}
57 
58  template<class View0, class View1>
59  ExecStatus Subset<View0,View1>::post(Home home, View0 x, View1 y) {
60  (void) new (home) Subset(home,x,y);
61  return ES_OK;
62  }
63 
64  template<class View0, class View1>
65  Actor*
66  Subset<View0,View1>::copy(Space& home, bool share) {
67  return new (home) Subset(home,share,*this);
68  }
69 
70  template<class View0, class View1>
73  bool oneassigned = x0.assigned() || x1.assigned();
74  unsigned int x0glbsize;
75  do {
76  GlbRanges<View0> x0lb(x0);
77  GECODE_ME_CHECK ( x1.includeI(home,x0lb) );
78  GECODE_ME_CHECK ( x1.cardMin(home,x0.cardMin()) );
79  LubRanges<View1> x1ub(x1);
80  x0glbsize = x0.glbSize();
81  GECODE_ME_CHECK ( x0.intersectI(home,x1ub) );
82  GECODE_ME_CHECK ( x0.cardMax(home,x1.cardMax()) );
83  } while (x0.glbSize() > x0glbsize);
84 
85  if (x0.cardMin() == x1.cardMax())
86  GECODE_REWRITE(*this,(Eq<View0,View1>::post(home(*this),x0,x1)));
87 
88  if (shared(x0,x1)) {
89  return oneassigned ? home.ES_SUBSUMED(*this) : ES_NOFIX;
90  }
91  return (x0.assigned() || x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_FIX;
92  }
93 
94 }}}
95 
96 // STATISTICS: set-prop