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when.hpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Christian Schulte <schulte@gecode.org>
5 *
6 * Copyright:
7 * Christian Schulte, 2009
8 *
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33
34namespace 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
NodeType t
Type of node.
int p
Number of positive literals for node type.
Home class for posting propagators
Definition core.hpp:856
Boolean view for Boolean variables.
Definition view.hpp:1380
Conditional propagator.
Definition exec.hh:52
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
SharedData< std::function< void(Space &home)> > t
Then function.
Definition exec.hh:56
When(Space &home, When &p)
Constructor for cloning p.
Definition when.hpp:45
SharedData< std::function< void(Space &home)> > e
Else function pointer.
Definition exec.hh:58
Exception: invalid function
Computation spaces.
Definition core.hpp:1742
Unary propagator.
Definition pattern.hpp:55
bool failed(void) const
Check whether space is failed.
Definition core.hpp:4044
void notice(Actor &a, ActorProperty p, bool duplicate=false)
Notice actor property.
Definition core.hpp:4059
@ AP_DISPOSE
Actor must always be disposed.
Definition core.hpp:562
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value)
Definition var-type.hpp:126
Gecode toplevel namespace
ExecStatus
Definition core.hpp:472
@ ES_OK
Execution is okay.
Definition core.hpp:476
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474
Post propagator for SetVar x
Definition set.hh:767
#define forceinline
Definition config.hpp:187