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ter-dom.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2003
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10  * $Date: 2010-03-04 03:32:21 +1100 (Thu, 04 Mar 2010) $ by $Author: schulte $
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37 
38 namespace Gecode { namespace Int { namespace Distinct {
39 
40 
41  /*
42  * Ternary domain consistent distinct
43  *
44  */
45 
46  template<class View>
48  TerDom<View>::TerDom(Home home, View x0, View x1, View x2)
49  : TernaryPropagator<View,PC_INT_DOM>(home,x0,x1,x2) {}
50 
51  template<class View>
53  TerDom<View>::post(Home home, View x0, View x1, View x2) {
54  (void) new (home) TerDom<View>(home,x0,x1,x2);
55  return ES_OK;
56  }
57 
58  template<class View>
60  TerDom<View>::TerDom(Space& home, bool share, TerDom<View>& p)
61  : TernaryPropagator<View,PC_INT_DOM>(home,share,p) {}
62 
63  template<class View>
64  Actor*
65  TerDom<View>::copy(Space& home, bool share) {
66  return new (home) TerDom<View>(home,share,*this);
67  }
68 
70 #define GECODE_INT_HALL_ONE(x0,x1,x2) \
71  if (x0.assigned()) { \
72  GECODE_ME_CHECK(x1.nq(home,x0.val())); \
73  GECODE_ME_CHECK(x2.nq(home,x0.val())); \
74  if (x1.assigned()) { \
75  GECODE_ME_CHECK(x2.nq(home,x1.val())); \
76  return home.ES_SUBSUMED(*this); \
77  } \
78  if (x2.assigned()) { \
79  GECODE_ME_CHECK(x1.nq(home,x2.val())); \
80  return home.ES_SUBSUMED(*this); \
81  } \
82  return ES_FIX; \
83  }
84 
85 
87 #define GECODE_INT_HALL_TWO(x0,x1,x2) \
88  if ((x0.size() == 2) && (x1.size() == 2) && \
89  (x0.min() == x1.min()) && (x0.max() == x1.max())) { \
90  GECODE_ME_CHECK(x2.nq(home,x0.min())); \
91  GECODE_ME_CHECK(x2.nq(home,x0.max())); \
92  return ES_FIX; \
93  }
94 
95  template<class View>
98  GECODE_INT_HALL_ONE(x0,x1,x2);
99  GECODE_INT_HALL_ONE(x1,x0,x2);
100  GECODE_INT_HALL_ONE(x2,x0,x1);
101  GECODE_INT_HALL_TWO(x0,x1,x2);
102  GECODE_INT_HALL_TWO(x0,x2,x1);
103  GECODE_INT_HALL_TWO(x1,x2,x0);
104  return ES_FIX;
105  }
106 
107 #undef GECODE_INT_HALL_ONE
108 #undef GECODE_INT_HALL_TWO
109 
110 }}}
111 
112 // STATISTICS: int-prop
113