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eq.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Guido Tack <tack@gecode.org>
5  * Christian Schulte <schulte@gecode.org>
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7  * Contributing authors:
8  * Gabor Szokoli <szokoli@gecode.org>
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10  * Copyright:
11  * Guido Tack, 2004
12  * Christian Schulte, 2004
13  * Gabor Szokoli, 2004
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15  * Last modified:
16  * $Date: 2013-02-27 17:15:18 +0100 (Wed, 27 Feb 2013) $ by $Author: schulte $
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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>
53  Eq<View0,View1>::Eq(Space& home, bool share, Eq& p)
54  : MixBinaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY>(home,share,p) {}
55 
56  template<class View0, class View1>
58  Eq<View0,View1>::post(Home home, View0 x, View1 y) {
59  (void) new (home) Eq(home,x,y);
60  return ES_OK;
61  }
62 
63  template<class View0, class View1>
64  Actor*
65  Eq<View0,View1>::copy(Space& home, bool share) {
66  return new (home) Eq(home,share,*this);
67  }
68 
69  template<class View0, class View1>
72 
73  ModEvent me0 = View0::me(med);
74  ModEvent me1 = View1::me(med);
75 
76  Region r(home);
77 
78  if (testSetEventLB(me0,me1)) {
79  GlbRanges<View0> x0lb(x0);
80  GlbRanges<View1> x1lb(x1);
82  Iter::Ranges::Cache lbuc(r,lbu);
83  GECODE_ME_CHECK(x0.includeI(home,lbuc));
84  lbuc.reset();
85  GECODE_ME_CHECK(x1.includeI(home,lbuc));
86  }
87 
88  if (testSetEventUB(me0,me1)) {
89  LubRanges<View0> x0ub(x0);
90  LubRanges<View1> x1ub(x1);
92  Iter::Ranges::Cache ubic(r,ubi);
93  GECODE_ME_CHECK(x0.intersectI(home,ubic));
94  ubic.reset();
95  GECODE_ME_CHECK(x1.intersectI(home,ubic));
96  }
97 
98  if (testSetEventCard(me0,me1)) {
99  unsigned int max = std::min(x0.cardMax(),x1.cardMax());
100  unsigned int min = std::max(x0.cardMin(),x1.cardMin());
101  GECODE_ME_CHECK(x0.cardMax(home,max));
102  GECODE_ME_CHECK(x1.cardMax(home,max));
103  GECODE_ME_CHECK(x0.cardMin(home,min));
104  GECODE_ME_CHECK(x1.cardMin(home,min));
105  }
106 
107  if (x0.assigned()) {
108  assert (x1.assigned());
109  return home.ES_SUBSUMED(*this);
110  }
111  return shared(x0,x1) ? ES_NOFIX : ES_FIX;
112  }
113 
114 }}}
115 
116 // STATISTICS: set-prop
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:2973
const FloatNum max
Largest allowed float value.
Definition: float.hh:831
void max(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition: arithmetic.cpp:57
int ModEvent
Type for modification events.
Definition: core.hpp:146
virtual Actor * copy(Space &home, bool)
Copy propagator during cloning.
Definition: eq.hpp:65
Range iterator for the greatest lower bound.
Definition: var-imp.hpp:363
Handle to region.
Definition: region.hpp:61
Propagation has computed fixpoint.
Definition: core.hpp:528
Computation spaces.
Definition: core.hpp:1362
Range iterator for the least upper bound.
Definition: var-imp.hpp:321
Base-class for both propagators and branchers.
Definition: core.hpp:666
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
const FloatNum min
Smallest allowed float value.
Definition: float.hh:833
void reset(void)
Reset iterator to start.
Range iterator for computing intersection (binary)
NNF * r
Right subtree.
Definition: bool-expr.cpp:246
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:45
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: eq.hpp:71
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)
void min(Home home, FloatVar x0, FloatVar x1, FloatVar x2)
Post propagator for .
Definition: arithmetic.cpp:75
bool testSetEventLB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition: common.hpp:75
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
Mixed binary propagator.
Definition: propagator.hpp:203
Range iterator cache
ExecStatus
Definition: core.hpp:523
#define forceinline
Definition: config.hpp:132
Propagator for set equality
Definition: rel.hh:146
Execution is okay.
Definition: core.hpp:527
Propagation has not computed fixpoint.
Definition: core.hpp:526
bool shared(const ConstView< ViewA > &, const ConstView< ViewB > &)
Test whether views share same variable.
Definition: view.hpp:662
bool testSetEventCard(ModEvent me0, ModEvent me1, ModEvent me2)
Definition: common.hpp:87
Gecode toplevel namespace
Eq(Space &home, bool share, Eq &p)
Constructor for cloning p.
Definition: eq.hpp:53
bool testSetEventUB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition: common.hpp:79
int ModEventDelta
Modification event deltas.
Definition: core.hpp:173
Home class for posting propagators
Definition: core.hpp:717
static ExecStatus post(Home home, View0, View1)
Post propagator .
Definition: eq.hpp:58