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link-multi.hpp
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37 
38 namespace Gecode { namespace Int { namespace Channel {
39 
41  LinkMulti::LinkMulti(Home home, ViewArray<BoolView>& x, IntView y, int o0)
42  : MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM>
43  (home,x,y), c(home), status(S_NONE), o(o0) {
44  x.subscribe(home,*new (home) Advisor(home,*this,c));
45  // Propagator is scheduled because of the dependency subscription
46  }
47 
50  int n=x.size();
51  GECODE_ME_CHECK(y.gq(home,o));
52  GECODE_ME_CHECK(y.lq(home,o+n-1));
53  assert(n > 0);
54  if (n == 1) {
55  GECODE_ME_CHECK(x[0].one(home));
56  assert(y.val() == o);
57  } else if (y.assigned()) {
58  int j=y.val()-o;
59  GECODE_ME_CHECK(x[j].one(home));
60  for (int i=0; i<j; i++)
61  GECODE_ME_CHECK(x[i].zero(home));
62  for (int i=j+1; i<n; i++)
63  GECODE_ME_CHECK(x[i].zero(home));
64  } else {
65  for (int i=n; i--; )
66  if (x[i].one()) {
67  for (int j=0; j<i; j++)
68  GECODE_ME_CHECK(x[j].zero(home));
69  for (int j=i+1; j<n; j++)
70  GECODE_ME_CHECK(x[j].zero(home));
71  GECODE_ME_CHECK(y.eq(home,o+i));
72  return ES_OK;
73  } else if (x[i].zero()) {
74  GECODE_ME_CHECK(y.nq(home,o+i));
75  }
76  (void) new (home) LinkMulti(home,x,y,o);
77  }
78  return ES_OK;
79  }
80 
81 }}}
82 
83 // STATISTICS: int-prop
84 
int val(void) const
Return assigned value (only if assigned)
Definition: int.hpp:70
ModEvent nq(Space &home, int n)
Restrict domain values to be different from n.
Definition: int.hpp:151
bool one(const Gecode::FloatValArgs &a)
Check whether has only one coefficients.
Definition: linear.cpp:50
ModEvent eq(Space &home, int n)
Restrict domain values to be equal to n.
Definition: int.hpp:160
Gecode::FloatVal c(-8, 8)
Gecode::IntArgs i(4, 1, 2, 3, 4)
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:238
const Gecode::PropCond PC_BOOL_NONE
Propagation condition to be ignored (convenience)
Definition: var-type.hpp:118
ModEvent lq(Space &home, int n)
Restrict domain values to be less or equal than n.
Definition: int.hpp:115
const Gecode::PropCond PC_INT_DOM
Propagate when domain changes.
Definition: var-type.hpp:100
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:45
static ExecStatus post(Home home, ViewArray< BoolView > &x, IntView y, int o)
Post propagator for .
Definition: link-multi.hpp:49
Integer view for integer variables.
Definition: view.hpp:129
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
friend class Advisor
Definition: core.hpp:759
ExecStatus
Definition: core.hpp:523
#define forceinline
Definition: config.hpp:132
bool assigned(void) const
Test whether view is assigned.
Definition: view.hpp:448
ModEvent gq(Space &home, int n)
Restrict domain values to be greater or equal than n.
Definition: int.hpp:133
Execution is okay.
Definition: core.hpp:527
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1215
Gecode toplevel namespace
Link propagator for multiple Boolean views.
Definition: channel.hh:199
Home class for posting propagators
Definition: core.hpp:717