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ter-dom.hpp
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4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2003
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33 
34 namespace Gecode { namespace Int { namespace Distinct {
35 
36 
37  /*
38  * Ternary domain consistent distinct
39  *
40  */
41 
42  template<class View>
44  TerDom<View>::TerDom(Home home, View x0, View x1, View x2)
45  : TernaryPropagator<View,PC_INT_DOM>(home,x0,x1,x2) {}
46 
47  template<class View>
49  TerDom<View>::post(Home home, View x0, View x1, View x2) {
50  (void) new (home) TerDom<View>(home,x0,x1,x2);
51  return ES_OK;
52  }
53 
54  template<class View>
57  : TernaryPropagator<View,PC_INT_DOM>(home,p) {}
58 
59  template<class View>
60  Actor*
62  return new (home) TerDom<View>(home,*this);
63  }
64 
66 #define GECODE_INT_HALL_ONE(x0,x1,x2) \
67  if (x0.assigned()) { \
68  GECODE_ME_CHECK(x1.nq(home,x0.val())); \
69  GECODE_ME_CHECK(x2.nq(home,x0.val())); \
70  if (x1.assigned()) { \
71  GECODE_ME_CHECK(x2.nq(home,x1.val())); \
72  return home.ES_SUBSUMED(*this); \
73  } \
74  if (x2.assigned()) { \
75  GECODE_ME_CHECK(x1.nq(home,x2.val())); \
76  return home.ES_SUBSUMED(*this); \
77  } \
78  return ES_FIX; \
79  }
80 
81 
83 #define GECODE_INT_HALL_TWO(x0,x1,x2) \
84  if ((x0.size() == 2) && (x1.size() == 2) && \
85  (x0.min() == x1.min()) && (x0.max() == x1.max())) { \
86  GECODE_ME_CHECK(x2.nq(home,x0.min())); \
87  GECODE_ME_CHECK(x2.nq(home,x0.max())); \
88  return ES_FIX; \
89  }
90 
91  template<class View>
94  GECODE_INT_HALL_ONE(x0,x1,x2);
95  GECODE_INT_HALL_ONE(x1,x0,x2);
96  GECODE_INT_HALL_ONE(x2,x0,x1);
97  GECODE_INT_HALL_TWO(x0,x1,x2);
98  GECODE_INT_HALL_TWO(x0,x2,x1);
99  GECODE_INT_HALL_TWO(x1,x2,x0);
100  return ES_FIX;
101  }
102 
103 #undef GECODE_INT_HALL_ONE
104 #undef GECODE_INT_HALL_TWO
105 
106 }}}
107 
108 // STATISTICS: int-prop
109 
TerDom(Space &home, TerDom< View > &p)
Constructor for cloning p.
Definition: ter-dom.hpp:56
static ExecStatus post(Home home, View x0, View x1, View x2)
Post propagator for views x.
Definition: ter-dom.hpp:49
Computation spaces.
Definition: core.hpp:1742
Base-class for both propagators and branchers.
Definition: core.hpp:628
Gecode toplevel namespace
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: ter-dom.hpp:93
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition: ter-dom.hpp:61
Ternary domain consistent distinct propagator.
Definition: distinct.hh:322
Home class for posting propagators
Definition: core.hpp:856
Ternary propagator.
Definition: pattern.hpp:113
#define GECODE_INT_HALL_TWO(x0, x1, x2)
Check whether x0 and x1 form a Hall set of cardinality two.
Definition: ter-dom.hpp:83
#define GECODE_INT_HALL_ONE(x0, x1, x2)
Check whether x0 forms a Hall set of cardinality one.
Definition: ter-dom.hpp:66
@ ES_FIX
Propagation has computed fixpoint.
Definition: core.hpp:477
#define forceinline
Definition: config.hpp:185
const Gecode::PropCond PC_INT_DOM
Propagate when domain changes.
Definition: var-type.hpp:100
int ModEventDelta
Modification event deltas.
Definition: core.hpp:89
@ ES_OK
Execution is okay.
Definition: core.hpp:476
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:232
ExecStatus
Definition: core.hpp:472