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link-single.cpp
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3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2007
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10  * $Date: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $
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37 
38 #include <gecode/int/channel.hh>
39 
40 namespace Gecode { namespace Int { namespace Channel {
41 
43  LinkSingle::LinkSingle(Space& home, bool share, LinkSingle& p)
44  : MixBinaryPropagator<BoolView,PC_BOOL_VAL,IntView,PC_INT_VAL>
45  (home,share,p) {}
46 
47  Actor*
48  LinkSingle::copy(Space& home, bool share) {
49  return new (home) LinkSingle(home,share,*this);
50  }
51 
52  PropCost
53  LinkSingle::cost(const Space&, const ModEventDelta&) const {
55  }
56 
59  if (x0.zero()) {
60  GECODE_ME_CHECK(x1.eq(home,0));
61  } else if (x0.one()) {
62  GECODE_ME_CHECK(x1.eq(home,1));
63  } else {
64  assert(x0.none() && x1.assigned());
65  if (x1.val() == 0) {
67  } else {
68  assert(x1.val() == 1);
70  }
71  }
72  return home.ES_SUBSUMED(*this);
73  }
74 
75 }}}
76 
77 // STATISTICS: int-prop
int val(void) const
Return assigned value (only if assigned)
Definition: int.hpp:70
bool none(void) const
Test whether view is not yet assigned.
Definition: bool.hpp:222
virtual Actor * copy(Space &home, bool share)
Copy propagator during cloning.
Definition: link-single.cpp:48
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:2973
ModEvent eq(Space &home, int n)
Restrict domain values to be equal to n.
Definition: int.hpp:160
static PropCost unary(PropCost::Mod m)
Single variable for modifier pcm.
Definition: core.hpp:4058
Computation spaces.
Definition: core.hpp:1362
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
ModEvent zero_none(Space &home)
Assign not yet assigned view to zero.
Definition: bool.hpp:232
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: link-single.cpp:58
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:45
bool one(void) const
Test whether view is assigned to be one.
Definition: bool.hpp:218
Propagation cost.
Definition: core.hpp:537
Link propagator for a single Boolean view.
Definition: channel.hh:172
ExecStatus
Definition: core.hpp:523
#define forceinline
Definition: config.hpp:132
virtual PropCost cost(const Space &home, const ModEventDelta &med) const
Cost function (defined as low unary)
Definition: link-single.cpp:53
bool assigned(void) const
Test whether view is assigned.
Definition: view.hpp:448
Gecode toplevel namespace
ModEvent one_none(Space &home)
Assign not yet assigned view to one.
Definition: bool.hpp:236
bool zero(void) const
Test whether view is assigned to be zero.
Definition: bool.hpp:214
int ModEventDelta
Modification event deltas.
Definition: core.hpp:173
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value)
Definition: var-type.hpp:82
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value)
Definition: var-type.hpp:126