div.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Guido Tack <tack@gecode.org>
* Vincent Barichard <Vincent.Barichard@univ-angers.fr>
*
* Copyright:
* Guido Tack, 2008
* Vincent Barichard, 2012
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
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* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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namespace Gecode { namespace Float { namespace Arithmetic {
/*
* Bounds consistent division operator
*
*/
template<class A, class B, class C>
forceinline
Div<A,B,C>::Div(Home home, A x0, B x1, C x2)
: MixTernaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND,C,PC_FLOAT_BND>(home,x0,x1,x2) {}
template<class A, class B, class C>
forceinline
Div<A,B,C>::Div(Space& home, Div<A,B,C>& p)
: MixTernaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND,C,PC_FLOAT_BND>(home,p) {}
template<class A, class B, class C>
Actor*
Div<A,B,C>::copy(Space& home) {
return new (home) Div<A,B,C>(home,*this);
}
template<class A, class B, class C>
ExecStatus
Div<A,B,C>::post(Home home, A x0, B x1, C x2) {
GECODE_ME_CHECK(x2.eq(home,x0.domain() / x1.domain()));
GECODE_ME_CHECK(x0.eq(home,x2.domain() * x1.domain()));
(void) new (home) Div<A,B,C>(home,x0,x1,x2);
return ES_OK;
}
template<class A, class B, class C>
ExecStatus
Div<A,B,C>::propagate(Space& home, const ModEventDelta&) {
if (x1.assigned() && (x1.val() == 0)) return ES_FAILED;
GECODE_ME_CHECK(x2.eq(home,x0.domain() / x1.domain()));
GECODE_ME_CHECK(x0.eq(home,x2.domain() * x1.domain()));
if (!x2.assigned() || (x2.val() != 0.0))
GECODE_ME_CHECK(x1.eq(home,x0.domain() / x2.domain()));
return (x0.assigned() && x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_NOFIX;
}
}}}
// STATISTICS: float-prop
Gecode::Actor
Base-class for both propagators and branchers.
Definition core.hpp:628
Gecode::Float::Arithmetic::Div::copy
virtual Actor * copy(Space &home)
Create copy during cloning.
Definition div.hpp:54
Gecode::Float::Arithmetic::Div::Div
Div(Space &home, Div &p)
Constructor for cloning p.
Definition div.hpp:49
Gecode::Float::Arithmetic::Div::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition div.hpp:69
Gecode::Float::Arithmetic::Div::post
static ExecStatus post(Home home, A x0, B x1, C x2)
Post propagator for .
Definition div.hpp:60
Gecode::Home
Home class for posting propagators
Definition core.hpp:856
Gecode::MixTernaryPropagator< A, PC_FLOAT_BND, B, PC_FLOAT_BND, C, PC_FLOAT_BND >::x0
A x0
Definition pattern.hpp:240
Gecode::MixTernaryPropagator< A, PC_FLOAT_BND, B, PC_FLOAT_BND, C, PC_FLOAT_BND >::x1
B x1
Definition pattern.hpp:242
Gecode::MixTernaryPropagator< A, PC_FLOAT_BND, B, PC_FLOAT_BND, C, PC_FLOAT_BND >::x2
C x2
Definition pattern.hpp:244
Gecode::MixTernaryPropagator< A, PC_FLOAT_BND, B, PC_FLOAT_BND, C, PC_FLOAT_BND >::MixTernaryPropagator
MixTernaryPropagator(Space &home, MixTernaryPropagator &p)
Definition pattern.hpp:661
Gecode::Propagator::Space
friend class Space
Definition core.hpp:1066
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition core.hpp:3563
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition core.hpp:89
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
Gecode::Float::Arithmetic
Arithmetic propagators
Gecode::Float
Floating point numbers.
Gecode::Float::PC_FLOAT_BND
const Gecode::PropCond PC_FLOAT_BND
Propagate when minimum or maximum of a view changes.
Definition var-type.hpp:292
Gecode
Gecode toplevel namespace
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476
Gecode::ES_FAILED
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474
Gecode::ES_NOFIX
@ ES_NOFIX
Propagation has not computed fixpoint.
Definition core.hpp:475
forceinline
#define forceinline
Definition config.hpp:187