subofunion.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Guido Tack <tack@gecode.org>
* Christian Schulte <schulte@gecode.org>
*
* Contributing authors:
* Gabor Szokoli <szokoli@gecode.org>
*
* Copyright:
* Guido Tack, 2004
* Christian Schulte, 2004
* Gabor Szokoli, 2004
*
* 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
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* 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 Set { namespace RelOp {
template<class View0, class View1, class View2>
Actor*
SubOfUnion<View0,View1,View2>::copy(Space& home) {
return new (home) SubOfUnion(home,*this);
}
template<class View0, class View1, class View2>
ExecStatus
SubOfUnion<View0,View1,View2>::propagate(Space& home, const ModEventDelta& med) {
bool allassigned = x0.assigned() && x1.assigned() && x2.assigned();
ModEvent me0 = View0::me(med);
ModEvent me1 = View1::me(med);
ModEvent me2 = View2::me(med);
bool modified=false;
do {
// lub(x2) <= lub(x0) u lub(x1)
if (modified || Rel::testSetEventUB(me0,me1))
{
LubRanges<View0> ub0(x0);
LubRanges<View1> ub1(x1);
Iter::Ranges::Union<LubRanges<View0>, LubRanges<View1> > u(ub0,ub1);
GECODE_ME_CHECK(x2.intersectI(home,u));
}
// x1 <= glb(x2)-lub(x0)
// x0 <= glb(x2)-lub(x1)
if (modified || Rel::testSetEventAnyB(me0,me1,me2)) {
{
modified = false;
GlbRanges<View2> lb2(x2);
LubRanges<View0> ub0(x0);
Iter::Ranges::Diff<GlbRanges<View2>, LubRanges<View0> >
diff(lb2,ub0);
GECODE_ME_CHECK_MODIFIED(modified, x1.includeI(home,diff));
}
{
GlbRanges<View2> lb2(x2);
LubRanges<View1> ub1(x1);
Iter::Ranges::Diff<GlbRanges<View2>, LubRanges<View1> >
diff(lb2,ub1);
GECODE_ME_CHECK_MODIFIED(modified, x0.includeI(home,diff));
}
} else {
modified = false;
}
// cardinality propagation
if (modified ||
Rel::testSetEventCard(me0,me1,me2) ||
Rel::testSetEventLB(me0,me1)
) {
GlbRanges<View0> lb0c(x0);
GlbRanges<View1> lb1c(x1);
Iter::Ranges::Inter<GlbRanges<View0>, GlbRanges<View1> >
inter(lb0c,lb1c);
unsigned int m = Iter::Ranges::size(inter);
if (m < x0.cardMax()+x1.cardMax()) {
GECODE_ME_CHECK_MODIFIED(modified,
x2.cardMax( home,
x0.cardMax()+x1.cardMax() - m ) );
}
if (m + x2.cardMin() > x1.cardMax()) {
GECODE_ME_CHECK_MODIFIED(modified,
x0.cardMin( home,
m+x2.cardMin()-x1.cardMax() ) );
}
if (m + x2.cardMin() > x0.cardMax()) {
GECODE_ME_CHECK_MODIFIED(modified,
x1.cardMin( home,
m+x2.cardMin()-x0.cardMax() ) );
}
}
} while (modified);
if (shared(x0,x1,x2)) {
if (allassigned) {
return home.ES_SUBSUMED(*this);
} else {
return ES_NOFIX;
}
} else {
if (x0.assigned() + x1.assigned() + x2.assigned() >= 2) {
return home.ES_SUBSUMED(*this);
} else {
return ES_FIX;
}
}
}
template<class View0, class View1, class View2>
forceinline
SubOfUnion<View0,View1,View2>::SubOfUnion(Home home, View0 y0,
View1 y1, View2 y2)
: MixTernaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY,
View2,PC_SET_ANY>(home,y0,y1,y2) {}
template<class View0, class View1, class View2>
forceinline
SubOfUnion<View0,View1,View2>::SubOfUnion
(Space& home, SubOfUnion<View0,View1,View2>& p)
: MixTernaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY,
View2,PC_SET_ANY>(home,p) {}
template<class View0, class View1, class View2>
ExecStatus SubOfUnion<View0,View1,View2>::post
(Home home, View0 x0, View1 x1, View2 x2) {
(void) new (home) SubOfUnion<View0,View1,View2>(home,x0, x1, x2);
return ES_OK;
}
}}}
// STATISTICS: set-prop
Gecode::Home
Home class for posting propagators
Definition core.hpp:856
Gecode::Iter::Ranges::Diff
Range iterator for computing set difference.
Definition ranges-diff.hpp:43
Gecode::Iter::Ranges::Inter
Range iterator for computing intersection (binary).
Definition ranges-inter.hpp:44
Gecode::Iter::Ranges::Union
Range iterator for computing union (binary).
Definition ranges-union.hpp:44
Gecode::MixTernaryPropagator< View0, PC_SET_ANY, View1, PC_SET_ANY, View2, PC_SET_ANY >::x0
View0 x0
Definition pattern.hpp:240
Gecode::MixTernaryPropagator< View0, PC_SET_ANY, View1, PC_SET_ANY, View2, PC_SET_ANY >::x1
View1 x1
Definition pattern.hpp:242
Gecode::MixTernaryPropagator< View0, PC_SET_ANY, View1, PC_SET_ANY, View2, PC_SET_ANY >::x2
View2 x2
Definition pattern.hpp:244
Gecode::MixTernaryPropagator< View0, PC_SET_ANY, View1, PC_SET_ANY, View2, PC_SET_ANY >::MixTernaryPropagator
MixTernaryPropagator(Space &home, MixTernaryPropagator &p)
Definition pattern.hpp:661
Gecode::Propagator::Space
friend class Space
Definition core.hpp:1066
Gecode::Propagator::med
ModEventDelta med
A set of modification events (used during propagation).
Definition core.hpp:1075
Gecode::Set::GlbRanges
Range iterator for the greatest lower bound.
Definition var-imp.hpp:359
Gecode::Set::LubRanges
Range iterator for the least upper bound.
Definition var-imp.hpp:317
Gecode::Set::RelOp::SubOfUnion::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition subofunion.hpp:50
Gecode::Set::RelOp::SubOfUnion::SubOfUnion
SubOfUnion(Space &home, SubOfUnion &p)
Constructor for cloning p.
Definition subofunion.hpp:149
Gecode::Set::RelOp::SubOfUnion::copy
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition subofunion.hpp:44
Gecode::Set::RelOp::SubOfUnion::post
static ExecStatus post(Home home, View0 x, View1 y, View2 z)
Post propagator .
Definition subofunion.hpp:155
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_ME_CHECK_MODIFIED
#define GECODE_ME_CHECK_MODIFIED(modified, me)
Check whether me is failed or modified, and forward failure.
Definition macros.hpp:64
Gecode::Iter::Ranges::size
unsigned int size(I &i)
Size of all ranges of range iterator i.
Definition ranges-operations.hpp:74
Gecode::Set::RelOp
Standard set operation propagators.
Definition rel-op.hh:46
Gecode::Set::RelOp::shared
bool shared(View0 v0, View1 v1, View2 v2)
Definition common.hpp:84
Gecode::Set::Rel::testSetEventLB
bool testSetEventLB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition common.hpp:83
Gecode::Set::Rel::testSetEventCard
bool testSetEventCard(ModEvent me0, ModEvent me1, ModEvent me2)
Definition common.hpp:95
Gecode::Set::Rel::testSetEventUB
bool testSetEventUB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition common.hpp:87
Gecode::Set::Rel::testSetEventAnyB
bool testSetEventAnyB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition common.hpp:91
Gecode::Set
Finite integer sets.
Definition var-imp.hpp:137
Gecode::Set::PC_SET_ANY
const Gecode::PropCond PC_SET_ANY
Propagate when any bound or the cardinality of a view changes.
Definition var-type.hpp:248
Gecode
Gecode toplevel namespace
Gecode::inter
SetExpr inter(const SetVarArgs &)
Intersection of set variables.
Definition set-expr.cpp:696
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476
Gecode::ES_FIX
@ ES_FIX
Propagation has computed fixpoint.
Definition core.hpp:477
Gecode::ES_NOFIX
@ ES_NOFIX
Propagation has not computed fixpoint.
Definition core.hpp:475
Gecode::ModEvent
int ModEvent
Type for modification events.
Definition core.hpp:62
forceinline
#define forceinline
Definition config.hpp:187