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div.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 * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
6 *
7 * Copyright:
8 * Guido Tack, 2008
9 * Vincent Barichard, 2012
10 *
11 * This file is part of Gecode, the generic constraint
12 * development environment:
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35
36namespace Gecode { namespace Float { namespace Arithmetic {
37
38 /*
39 * Bounds consistent division operator
40 *
41 */
42 template<class A, class B, class C>
44 Div<A,B,C>::Div(Home home, A x0, B x1, C x2)
46
47 template<class A, class B, class C>
51
52 template<class A, class B, class C>
53 Actor*
55 return new (home) Div<A,B,C>(home,*this);
56 }
57
58 template<class A, class B, class C>
60 Div<A,B,C>::post(Home home, A x0, B x1, C x2) {
61 GECODE_ME_CHECK(x2.eq(home,x0.domain() / x1.domain()));
62 GECODE_ME_CHECK(x0.eq(home,x2.domain() * x1.domain()));
63 (void) new (home) Div<A,B,C>(home,x0,x1,x2);
64 return ES_OK;
65 }
66
67 template<class A, class B, class C>
70 if (x1.assigned() && (x1.val() == 0)) return ES_FAILED;
71 GECODE_ME_CHECK(x2.eq(home,x0.domain() / x1.domain()));
72 GECODE_ME_CHECK(x0.eq(home,x2.domain() * x1.domain()));
73 if (!x2.assigned() || (x2.val() != 0.0))
74 GECODE_ME_CHECK(x1.eq(home,x0.domain() / x2.domain()));
75 return (x0.assigned() && x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_NOFIX;
76 }
77
78}}}
79
80// STATISTICS: float-prop
81
int p
Number of positive literals for node type.
Base-class for both propagators and branchers.
Definition core.hpp:628
Propagator for bounds division operator
virtual Actor * copy(Space &home)
Create copy during cloning.
Definition div.hpp:54
Div(Space &home, Div &p)
Constructor for cloning p.
Definition div.hpp:49
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition div.hpp:69
static ExecStatus post(Home home, A x0, B x1, C x2)
Post propagator for .
Definition div.hpp:60
Home class for posting propagators
Definition core.hpp:856
Mixed ternary propagator.
Definition pattern.hpp:237
Computation spaces.
Definition core.hpp:1742
ExecStatus ES_SUBSUMED(Propagator &p)
Definition core.hpp:3563
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
const Gecode::PropCond PC_FLOAT_BND
Propagate when minimum or maximum of a view changes.
Definition var-type.hpp:292
Gecode toplevel namespace
ExecStatus
Definition core.hpp:472
@ ES_OK
Execution is okay.
Definition core.hpp:476
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474
@ ES_NOFIX
Propagation has not computed fixpoint.
Definition core.hpp:475
#define forceinline
Definition config.hpp:187