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propagate.hpp
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7  * Christian Schulte, 2019
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33 
34 #include <gecode/int/rel.hh>
35 
36 namespace Gecode { namespace Int { namespace Order {
37 
39  OrderProp::OrderProp(Home home, IntView _s0, int _p0, IntView _s1, int _p1,
40  BoolView _b)
41  : Propagator(home), s0(_s0), s1(_s1), b(_b), p0(_p0), p1(_p1) {
42  s0.subscribe(home,*this,PC_INT_BND);
43  s1.subscribe(home,*this,PC_INT_BND);
44  b.subscribe(home,*this,PC_INT_VAL);
45  }
46 
48  OrderProp::post(Home home, IntView s0, int p0, IntView s1, int p1,
49  BoolView b) {
50  if (s0.max() + p0 <= s1.min()) {
51  GECODE_ME_CHECK(b.zero(home));
52  } else if (s1.max() + p1 <= s0.min()) {
53  GECODE_ME_CHECK(b.one(home));
54  } else if ((s1.min() + p1 > s0.max()) || b.zero()) {
55  GECODE_ME_CHECK(b.zero(home));
57  } else if ((s0.min() + p0 > s1.max()) || b.one()) {
58  GECODE_ME_CHECK(b.one(home));
60  } else {
61  (void) new (home) OrderProp(home,s0,p0,s1,p1,b);
62  }
63  return ES_OK;
64  }
65 
68  : Propagator(home,p), p0(p.p0), p1(p.p1) {
69  s0.update(home,p.s0);
70  s1.update(home,p.s1);
71  b.update(home,p.b);
72  }
73 
74 }}}
75 
76 // STATISTICS: int-prop
struct Gecode::@602::NNF::@65::@66 b
For binary nodes (and, or, eqv)
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:232
Home class for posting propagators
Definition: core.hpp:856
Boolean view for Boolean variables.
Definition: view.hpp:1380
bool zero(void) const
Test whether view is assigned to be zero.
Definition: bool.hpp:220
bool one(void) const
Test whether view is assigned to be one.
Definition: bool.hpp:224
Integer view for integer variables.
Definition: view.hpp:129
int min(void) const
Return minimum of domain.
Definition: int.hpp:58
int max(void) const
Return maximum of domain.
Definition: int.hpp:62
Offset integer view.
Definition: view.hpp:443
Scheduling propagator for ordering two tasks
Definition: order.hh:53
static ExecStatus post(Home home, IntView s0, int p0, IntView s1, int p1, BoolView b)
Post order propagator.
Definition: propagate.hpp:48
BoolView b
Boolean view for order.
Definition: order.hh:58
int p0
Processing times.
Definition: order.hh:60
OrderProp(Space &home, OrderProp &p)
Constructor for cloning.
Definition: propagate.hpp:67
IntView s0
View for start times.
Definition: order.hh:56
static ExecStatus post(Home home, V0 x0, V1 x1)
Post propagator .
Definition: lq-le.hpp:50
Base-class for propagators.
Definition: core.hpp:1064
Computation spaces.
Definition: core.hpp:1742
void update(Space &home, VarImpView< Var > &y)
Update this view to be a clone of view y.
Definition: view.hpp:567
void subscribe(Space &home, Propagator &p, PropCond pc, bool schedule=true)
Subscribe propagator p with propagation condition pc to view.
Definition: view.hpp:521
ExecStatus
Definition: core.hpp:472
@ ES_OK
Execution is okay.
Definition: core.hpp:476
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:52
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value)
Definition: var-type.hpp:82
const Gecode::PropCond PC_INT_BND
Propagate when minimum or maximum of a view changes.
Definition: var-type.hpp:91
Single _b(1, 4)
#define forceinline
Definition: config.hpp:194