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range.hpp
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3 * Main authors:
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7 * Christian Schulte, 2004
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33
34#include <gecode/int/rel.hh>
35
36namespace Gecode { namespace Int { namespace Dom {
37
38 template<class View, ReifyMode rm>
40 ReRange<View,rm>::ReRange(Home home, View x, int min0, int max0, BoolView b)
42 min(min0), max(max0) {}
43
44 template<class View, ReifyMode rm>
47 if (min == max) {
49 } else if ((min > max) || (max < x.min()) || (min > x.max())) {
50 if (rm == RM_PMI)
51 return ES_OK;
52 GECODE_ME_CHECK(b.zero(home));
53 } else if ((min <= x.min()) && (x.max() <= max)) {
54 if (rm == RM_IMP)
55 return ES_OK;
56 GECODE_ME_CHECK(b.one(home));
57 } else if (b.one()) {
58 if (rm == RM_PMI)
59 return ES_OK;
60 GECODE_ME_CHECK(x.gq(home,min));
61 GECODE_ME_CHECK(x.lq(home,max));
62 } else if (b.zero()) {
63 if (rm == RM_IMP)
64 return ES_OK;
66 GECODE_ME_CHECK(x.minus_r(home,r,false));
67 } else {
68 (void) new (home) ReRange<View,rm>(home,x,min,max,b);
69 }
70 return ES_OK;
71 }
72
73
74 template<class View, ReifyMode rm>
79
80 template<class View, ReifyMode rm>
81 Actor*
83 return new (home) ReRange<View,rm>(home,*this);
84 }
85
86 template<class View, ReifyMode rm>
89 if (b.one()) {
90 if (rm != RM_PMI) {
91 GECODE_ME_CHECK(x0.gq(home,min));
92 GECODE_ME_CHECK(x0.lq(home,max));
93 }
94 return home.ES_SUBSUMED(*this);
95 } else if (b.zero()) {
96 if (rm != RM_IMP) {
98 GECODE_ME_CHECK(x0.minus_r(home,r,false));
99 }
100 return home.ES_SUBSUMED(*this);
101 } else if ((x0.max() <= max) && (x0.min() >= min)) {
102 if (rm != RM_IMP)
103 GECODE_ME_CHECK(b.one_none(home));
104 return home.ES_SUBSUMED(*this);
105 } else if ((x0.max() < min) || (x0.min() > max)) {
106 if (rm != RM_PMI)
107 GECODE_ME_CHECK(b.zero_none(home));
108 return home.ES_SUBSUMED(*this);
109 } else if (!x0.range()) {
110 ViewRanges<View> i_x(x0);
112
113 switch (Iter::Ranges::compare(i_x,i_mm)) {
115 if (rm != RM_IMP)
116 GECODE_ME_CHECK(b.one_none(home));
117 return home.ES_SUBSUMED(*this);
119 if (rm != RM_PMI)
120 GECODE_ME_CHECK(b.zero_none(home));
121 return home.ES_SUBSUMED(*this);
123 break;
124 default: GECODE_NEVER;
125 }
126 return ES_FIX;
127 }
128 return ES_FIX;
129 }
130
131}}}
132
133// STATISTICS: int-prop
134
Base-class for both propagators and branchers.
Definition core.hpp:628
Home class for posting propagators
Definition core.hpp:856
Boolean view for Boolean variables.
Definition view.hpp:1380
int min
Minimum of range.
Definition dom.hh:61
int max
Maximum of range.
Definition dom.hh:63
static ExecStatus post(Home home, View x, int min, int max, BoolView b)
Post propagator for .
Definition range.hpp:46
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition range.hpp:88
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition range.hpp:82
ReRange(Space &home, ReRange &p)
Constructor for cloning p.
Definition range.hpp:76
static ExecStatus post(Home home, View x, int c, CtrlView b)
Post domain consistent propagator .
Definition eq.hpp:644
Range iterator for integer views.
Definition view.hpp:54
Range iterator for singleton range.
friend class Space
Definition core.hpp:1068
ExecStatus ES_SUBSUMED(Propagator &p)
Propagator p is subsumed
Definition core.hpp:3570
int ModEventDelta
Modification event deltas.
Definition core.hpp:89
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
@ RM_IMP
Implication for reification.
Definition int.hh:877
@ RM_PMI
Inverse implication for reification.
Definition int.hh:884
Domain propagators.
Finite domain integers.
const Gecode::PropCond PC_INT_DOM
Propagate when domain changes.
Definition var-type.hpp:100
@ CS_NONE
Neither of the above.
@ CS_SUBSET
First is subset of second iterator.
@ CS_DISJOINT
Intersection is empty.
CompareStatus compare(I &i, J &j)
Check whether range iterator i is a subset of j, or whether they are disjoint.
Gecode toplevel namespace
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition set.hh:773
ExecStatus
Definition core.hpp:472
@ ES_OK
Execution is okay.
Definition core.hpp:476
@ ES_FIX
Propagation has computed fixpoint.
Definition core.hpp:477
Post propagator for SetVar x
Definition set.hh:773
#define forceinline
Definition config.hpp:194
#define GECODE_NEVER
Assert that this command is never executed.
Definition macros.hpp:56