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link-multi.hpp
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33 
34 namespace Gecode { namespace Int { namespace Channel {
35 
37  LinkMulti::LinkMulti(Home home, ViewArray<BoolView>& x, IntView y, int o0)
38  : MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM>
39  (home,x,y), c(home), status(S_NONE), o(o0) {
40  x.subscribe(home,*new (home) Advisor(home,*this,c));
41  // Propagator is scheduled because of the dependency subscription
42  }
43 
45  LinkMulti::LinkMulti(Space& home, LinkMulti& p)
46  : MixNaryOnePropagator<BoolView,PC_BOOL_NONE,IntView,PC_INT_DOM>
47  (home,p), status(S_NONE), o(p.o) {
48  assert(p.status == S_NONE);
49  c.update(home,p.c);
50  }
51 
54  int n=x.size();
55  GECODE_ME_CHECK(y.gq(home,o));
56  GECODE_ME_CHECK(y.lq(home,o+n-1));
57  assert(n > 0);
58  if (n == 1) {
59  GECODE_ME_CHECK(x[0].one(home));
60  assert(y.val() == o);
61  } else if (y.assigned()) {
62  int j=y.val()-o;
63  GECODE_ME_CHECK(x[j].one(home));
64  for (int i=0; i<j; i++)
65  GECODE_ME_CHECK(x[i].zero(home));
66  for (int i=j+1; i<n; i++)
67  GECODE_ME_CHECK(x[i].zero(home));
68  } else {
69  for (int i=0; i<n; i++)
70  if (x[i].one()) {
71  for (int j=0; j<i; j++)
72  GECODE_ME_CHECK(x[j].zero(home));
73  for (int j=i+1; j<n; j++)
74  GECODE_ME_CHECK(x[j].zero(home));
75  GECODE_ME_CHECK(y.eq(home,o+i));
76  return ES_OK;
77  } else if (x[i].zero()) {
78  GECODE_ME_CHECK(y.nq(home,o+i));
79  }
80  (void) new (home) LinkMulti(home,x,y,o);
81  }
82  return ES_OK;
83  }
84 
85 }}}
86 
87 // STATISTICS: int-prop
88 
ModEvent nq(Space &home, int n)
Restrict domain values to be different from n.
Definition: int.hpp:157
int val(void) const
Return assigned value (only if assigned)
Definition: int.hpp:70
bool one(const Gecode::FloatValArgs &a)
Check whether has only one coefficients.
Definition: linear.cpp:46
ModEvent eq(Space &home, int n)
Restrict domain values to be equal to n.
Definition: int.hpp:166
friend class Space
Definition: core.hpp:1025
#define forceinline
Definition: config.hpp:185
MixNaryOnePropagator(Space &home, MixNaryOnePropagator &p)
Constructor for cloning p.
Definition: pattern.hpp:733
Gecode::FloatVal c(-8, 8)
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:232
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:234
Gecode::IntArgs i({1, 2, 3, 4})
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:121
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:52
static ExecStatus post(Home home, ViewArray< BoolView > &x, IntView y, int o)
Post propagator for .
Definition: link-multi.hpp:53
Integer view for integer variables.
Definition: view.hpp:129
Post propagator for SetVar SetOpType SetVar y
Definition: set.hh:767
bool assigned(void) const
Test whether view is assigned.
Definition: view.hpp:516
friend class Advisor
Definition: core.hpp:1027
ExecStatus
Definition: core.hpp:471
ModEvent gq(Space &home, int n)
Restrict domain values to be greater or equal than n.
Definition: int.hpp:139
Post propagator for SetVar x
Definition: set.hh:767
Execution is okay.
Definition: core.hpp:475
Gecode toplevel namespace
Link propagator for multiple Boolean views.
Definition: channel.hh:197
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1138
Home class for posting propagators
Definition: core.hpp:853