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eq.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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4  * Guido Tack <tack@gecode.org>
5  * Christian Schulte <schulte@gecode.org>
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10  * Copyright:
11  * Guido Tack, 2004
12  * Christian Schulte, 2004
13  * Gabor Szokoli, 2004
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43 
44 namespace Gecode { namespace Set { namespace Rel {
45 
46  template<class View0, class View1>
48  Eq<View0,View1>::Eq(Home home, View0 x, View1 y)
49  : MixBinaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY>(home,x,y) {}
50 
51  template<class View0, class View1>
54  : MixBinaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY>(home,p) {}
55 
56  template<class View0, class View1>
58  Eq<View0,View1>::post(Home home, View0 x, View1 y) {
59  if (!same(x,y))
60  (void) new (home) Eq(home,x,y);
61  return ES_OK;
62  }
63 
64  template<class View0, class View1>
65  Actor*
67  return new (home) Eq(home,*this);
68  }
69 
70  template<class View0, class View1>
73 
74  ModEvent me0 = View0::me(med);
75  ModEvent me1 = View1::me(med);
76 
77  Region r;
78 
79  if (testSetEventLB(me0,me1)) {
80  GlbRanges<View0> x0lb(x0);
81  GlbRanges<View1> x1lb(x1);
83  Iter::Ranges::Cache lbuc(r,lbu);
84  GECODE_ME_CHECK(x0.includeI(home,lbuc));
85  lbuc.reset();
86  GECODE_ME_CHECK(x1.includeI(home,lbuc));
87  }
88 
89  if (testSetEventUB(me0,me1)) {
90  LubRanges<View0> x0ub(x0);
91  LubRanges<View1> x1ub(x1);
93  Iter::Ranges::Cache ubic(r,ubi);
94  GECODE_ME_CHECK(x0.intersectI(home,ubic));
95  ubic.reset();
96  GECODE_ME_CHECK(x1.intersectI(home,ubic));
97  }
98 
99  if (testSetEventCard(me0,me1)) {
100  unsigned int max = std::min(x0.cardMax(),x1.cardMax());
101  unsigned int min = std::max(x0.cardMin(),x1.cardMin());
102  GECODE_ME_CHECK(x0.cardMax(home,max));
103  GECODE_ME_CHECK(x1.cardMax(home,max));
104  GECODE_ME_CHECK(x0.cardMin(home,min));
105  GECODE_ME_CHECK(x1.cardMin(home,min));
106  }
107 
108  if (x0.assigned()) {
109  assert (x1.assigned());
110  return home.ES_SUBSUMED(*this);
111  }
112  return shared(x0,x1) ? ES_NOFIX : ES_FIX;
113  }
114 
115 }}}
116 
117 // STATISTICS: set-prop
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:3433
const FloatNum max
Largest allowed float value.
Definition: float.hh:848
void max(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition: arithmetic.cpp:53
int ModEvent
Type for modification events.
Definition: core.hpp:64
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition: eq.hpp:66
Eq(Space &home, Eq &p)
Constructor for cloning p.
Definition: eq.hpp:53
Range iterator for the greatest lower bound.
Definition: var-imp.hpp:363
Handle to region.
Definition: region.hpp:57
#define forceinline
Definition: config.hpp:182
Propagation has computed fixpoint.
Definition: core.hpp:469
Computation spaces.
Definition: core.hpp:1668
Range iterator for the least upper bound.
Definition: var-imp.hpp:321
Base-class for both propagators and branchers.
Definition: core.hpp:620
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
const FloatNum min
Smallest allowed float value.
Definition: float.hh:850
void reset(void)
Reset iterator to start.
Range iterator for computing intersection (binary)
ModEventDelta med
A set of modification events (used during propagation)
Definition: core.hpp:1027
bool same(VX, VY)
Test whether two views are in fact the same.
Definition: common.hpp:61
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:56
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: eq.hpp:72
const Gecode::PropCond PC_SET_ANY
Propagate when any bound or the cardinality of a view changes.
Definition: var-type.hpp:248
Range iterator for computing union (binary)
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition: set.hh:769
void min(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition: arithmetic.cpp:71
bool testSetEventLB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition: common.hpp:87
Post propagator for SetVar SetOpType SetVar y
Definition: set.hh:769
Mixed binary propagator.
Definition: pattern.hpp:208
Range iterator cache
ExecStatus
Definition: core.hpp:464
Propagator for set equality
Definition: rel.hh:154
Post propagator for SetVar x
Definition: set.hh:769
Execution is okay.
Definition: core.hpp:468
Propagation has not computed fixpoint.
Definition: core.hpp:467
bool shared(const ConstView< ViewA > &, const ConstView< ViewB > &)
Test whether views share same variable.
Definition: view.hpp:702
bool testSetEventCard(ModEvent me0, ModEvent me1, ModEvent me2)
Definition: common.hpp:99
Gecode toplevel namespace
bool testSetEventUB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition: common.hpp:91
int ModEventDelta
Modification event deltas.
Definition: core.hpp:91
Home class for posting propagators
Definition: core.hpp:846
static ExecStatus post(Home home, View0 x, View1 y)
Post propagator .
Definition: eq.hpp:58