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when.cpp
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3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2009
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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/exec.hh>
39 
40 namespace Gecode { namespace Int { namespace Exec {
41 
43  When::post(Home home, BoolView x, void (*t)(Space&), void (*e)(Space&)) {
44  if (x.zero() && (e != NULL)) {
45  e(home);
46  return home.failed() ? ES_FAILED : ES_OK;
47  } else if (x.zero() && (t != NULL)) {
48  t(home);
49  return home.failed() ? ES_FAILED : ES_OK;
50  } else {
51  (void) new (home) When(home,x,t,e);
52  return ES_OK;
53  }
54  }
55 
56  Actor*
57  When::copy(Space& home, bool share) {
58  return new (home) When(home,share,*this);
59  }
60 
63  if (x0.zero() && (e != NULL)) {
64  e(home);
65  } else if (t != NULL) {
66  assert(x0.one());
67  t(home);
68  }
69  if (home.failed()) return ES_FAILED;
70  return home.ES_SUBSUMED(*this);
71  }
72 
73 
74 }}}
75 
76 // STATISTICS: int-prop
77 
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: when.cpp:62
bool failed(void) const
Check whether corresponding space is failed.
Definition: core.hpp:3446
void(* t)(Space &)
Then function pointer.
Definition: exec.hh:60
NodeType t
Type of node.
Definition: bool-expr.cpp:234
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:2973
static ExecStatus post(Home home, BoolView x, void(*t)(Space &), void(*e)(Space &))
Post propagator.
Definition: when.cpp:43
virtual Actor * copy(Space &home, bool share)
Copy propagator during cloning.
Definition: when.cpp:57
Computation spaces.
Definition: core.hpp:1362
bool failed(void) const
Check whether space is failed.
Definition: core.hpp:3442
Base-class for both propagators and branchers.
Definition: core.hpp:666
Execution has resulted in failure.
Definition: core.hpp:525
void(* e)(Space &)
Else function pointer.
Definition: exec.hh:62
bool one(void) const
Test whether view is assigned to be one.
Definition: bool.hpp:218
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
ExecStatus
Definition: core.hpp:523
Execution is okay.
Definition: core.hpp:527
Gecode toplevel namespace
bool zero(void) const
Test whether view is assigned to be zero.
Definition: bool.hpp:214
When(Space &home, bool share, When &p)
Constructor for cloning p.
Definition: when.hpp:45
int ModEventDelta
Modification event deltas.
Definition: core.hpp:173
Home class for posting propagators
Definition: core.hpp:717
Boolean view for Boolean variables.
Definition: view.hpp:1315