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pair.hpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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3 * Main authors:
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7 * Christian Schulte, 2009
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33
34#include <gecode/int/rel.hh>
35
36namespace Gecode { namespace Int { namespace Element {
37
41
42 inline ExecStatus
44 int w, int h) {
45 GECODE_ME_CHECK(x0.gq(home,0)); GECODE_ME_CHECK(x0.le(home,w));
46 GECODE_ME_CHECK(x1.gq(home,0)); GECODE_ME_CHECK(x1.le(home,h));
47 GECODE_ME_CHECK(x2.gq(home,0)); GECODE_ME_CHECK(x2.le(home,w*h));
48 if (x0.assigned() && x1.assigned()) {
49 GECODE_ME_CHECK(x2.eq(home,x0.val()+w*x1.val()));
50 } else if (x1.assigned()) {
51 OffsetView x0x1w(x0,x1.val()*w);
53 } else if (x2.assigned()) {
54 GECODE_ME_CHECK(x0.eq(home,x2.val() % w));
55 GECODE_ME_CHECK(x1.eq(home,static_cast<int>(x2.val() / w)));
56 } else {
57 assert(!shared(x0,x2) && !shared(x1,x2));
58 (void) new (home) Pair(home,x0,x1,x2,w);
59 }
60 return ES_OK;
61 }
62
65 : TernaryPropagator<IntView,PC_INT_DOM>(home,p), w(p.w) {}
66
67}}}
68
69// STATISTICS: int-prop
70
Home class for posting propagators
Definition core.hpp:856
Pair(Space &home, Pair &p)
Constructor for cloning p.
Definition pair.hpp:64
static ExecStatus post(Home home, IntView x0, IntView x1, IntView x2, int w, int h)
Post propagator .
Definition pair.hpp:43
Integer view for integer variables.
Definition view.hpp:129
Offset integer view.
Definition view.hpp:443
static ExecStatus post(Home home, View0 x0, View1 x1)
Post domain consistent propagator .
Definition eq.hpp:176
friend class Space
Definition core.hpp:1068
TernaryPropagator(Space &home, TernaryPropagator &p)
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
Element propagators
Finite domain integers.
const Gecode::PropCond PC_INT_DOM
Propagate when domain changes.
Definition var-type.hpp:100
Gecode toplevel namespace
ExecStatus
Definition core.hpp:472
@ ES_OK
Execution is okay.
Definition core.hpp:476
bool shared(ViewArray< ViewX > x, ViewArray< ViewY > y)
Definition array.hpp:1472
#define forceinline
Definition config.hpp:194