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eqite.hpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
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7 * Christian Schulte, 2015
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33
34#include <algorithm>
35
36namespace Gecode { namespace Int { namespace Distinct {
37
39 EqIte::EqIte(Home home, IntView x0, IntView x1, int d0, int d1)
40 : BinaryPropagator<IntView,PC_INT_DOM>(home,x0,x1), c0(d0), c1(d1) {}
41
45 c0(p.c0), c1(p.c1) {}
46
47
48 inline ExecStatus
49 EqIte::post(Home home, IntView x0, IntView x1, int c0, int c1) {
50 assert(!(x0.assigned() && (x0.val() == c0)) && x0.in(c0));
51 GECODE_ME_CHECK(x1.lq(home,std::max(x0.max(),c1)));
52 GECODE_ME_CHECK(x1.gq(home,std::min(x0.min(),c1)));
53 (void) new (home) EqIte(home,x0,x1,c0,c1);
54 return ES_OK;
55 }
56
57}}}
58
59// STATISTICS: int-prop
int p
Number of positive literals for node type.
Binary propagator.
Definition pattern.hpp:84
Home class for posting propagators
Definition core.hpp:856
Equal-if-then-else domain-consistent propagator.
Definition distinct.hh:349
EqIte(Space &home, EqIte &p)
Constructor for cloning p.
Definition eqite.hpp:43
static ExecStatus post(Home home, IntView x0, IntView x1, int c0, int c1)
Post if-then-else propagator.
Definition eqite.hpp:49
int c0
The integer constant.
Definition distinct.hh:354
Integer view for integer variables.
Definition view.hpp:129
int min(void) const
Return minimum of domain.
Definition int.hpp:58
bool in(int n) const
Test whether n is contained in domain.
Definition int.hpp:107
ModEvent lq(Space &home, int n)
Restrict domain values to be less or equal than n.
Definition int.hpp:121
ModEvent gq(Space &home, int n)
Restrict domain values to be greater or equal than n.
Definition int.hpp:139
int val(void) const
Return assigned value (only if assigned)
Definition int.hpp:70
int max(void) const
Return maximum of domain.
Definition int.hpp:62
Computation spaces.
Definition core.hpp:1742
bool assigned(void) const
Test whether view is assigned.
Definition view.hpp:516
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
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
#define forceinline
Definition config.hpp:187