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when.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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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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33 
34 namespace Gecode { namespace Int { namespace Exec {
35 
38  std::function<void(Space& home)> t0,
39  std::function<void(Space& home)> e0)
40  : UnaryPropagator<BoolView,PC_BOOL_VAL>(home,x), t(t0), e(e0) {
41  home.notice(*this,AP_DISPOSE);
42  }
43 
46  : UnaryPropagator<BoolView,PC_BOOL_VAL>(home,p), t(p.t), e(p.e) {
47  }
48 
51  std::function<void(Space& home)> t,
52  std::function<void(Space& home)> e) {
53  if (!t)
54  throw InvalidFunction("When::When");
55  if (!e)
56  throw InvalidFunction("When::When");
57  if (x.zero()) {
58  e(home);
59  return home.failed() ? ES_FAILED : ES_OK;
60  } else if (x.one()) {
61  t(home);
62  return home.failed() ? ES_FAILED : ES_OK;
63  } else {
64  (void) new (home) When(home,x,t,e);
65  return ES_OK;
66  }
67  }
68 
69 }}}
70 
71 // STATISTICS: int-prop
72 
Post propagator for SetVar x
Definition: set.hh:767
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value)
Definition: var-type.hpp:126
When(Space &home, When &p)
Constructor for cloning p.
Definition: when.hpp:45
SharedData< std::function< void(Space &home)> > t
Then function.
Definition: exec.hh:56
NodeType t
Type of node.
Definition: bool-expr.cpp:230
Computation spaces.
Definition: core.hpp:1742
Conditional propagator.
Definition: exec.hh:52
Boolean view for Boolean variables.
Definition: view.hpp:1380
Gecode toplevel namespace
Home class for posting propagators
Definition: core.hpp:856
Actor must always be disposed.
Definition: core.hpp:562
SharedData< std::function< void(Space &home)> > e
Else function pointer.
Definition: exec.hh:58
bool failed(void) const
Check whether space is failed.
Definition: core.hpp:4044
static ExecStatus post(Home home, BoolView x, std::function< void(Space &home)> t, std::function< void(Space &home)> e)
Post propagator.
Definition: when.hpp:50
Exception: invalid function
Definition: exception.hpp:114
#define forceinline
Definition: config.hpp:185
Unary propagator.
Definition: pattern.hpp:55
void notice(Actor &a, ActorProperty p, bool duplicate=false)
Notice actor property.
Definition: core.hpp:4059
Execution has resulted in failure.
Definition: core.hpp:474
Execution is okay.
Definition: core.hpp:476
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:232
ExecStatus
Definition: core.hpp:472