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gecode
set
rel-op
subofunion.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Guido Tack <tack@gecode.org>
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* Christian Schulte <schulte@gecode.org>
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*
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* Contributing authors:
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* Gabor Szokoli <szokoli@gecode.org>
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*
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* Copyright:
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* Guido Tack, 2004
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* Christian Schulte, 2004
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* Gabor Szokoli, 2004
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace
Gecode
{
namespace
Set {
namespace
RelOp {
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template
<
class
View0,
class
View1,
class
View2>
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Actor*
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SubOfUnion<View0,View1,View2>::copy
(
Space
& home) {
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return
new
(home)
SubOfUnion
(home,*
this
);
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}
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template
<
class
View0,
class
View1,
class
View2>
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ExecStatus
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SubOfUnion<View0,View1,View2>::propagate
(
Space
& home,
const
ModEventDelta
& med) {
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bool
allassigned = x0.assigned() && x1.assigned() && x2.assigned();
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ModEvent
me0 = View0::me(med);
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ModEvent
me1 = View1::me(med);
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ModEvent
me2 = View2::me(med);
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bool
modified=
false
;
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do
{
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// lub(x2) <= lub(x0) u lub(x1)
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if
(modified ||
Rel::testSetEventUB
(me0,me1))
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{
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LubRanges<View0>
ub0(x0);
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LubRanges<View1>
ub1(x1);
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Iter::Ranges::Union<LubRanges<View0>
,
LubRanges<View1>
>
u
(ub0,ub1);
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GECODE_ME_CHECK
(x2.intersectI(home,
u
));
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}
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// x1 <= glb(x2)-lub(x0)
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// x0 <= glb(x2)-lub(x1)
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if
(modified ||
Rel::testSetEventAnyB
(me0,me1,me2)) {
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{
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modified =
false
;
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GlbRanges<View2>
lb2(x2);
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LubRanges<View0>
ub0(x0);
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Iter::Ranges::Diff<GlbRanges<View2>
,
LubRanges<View0>
>
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diff(lb2,ub0);
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GECODE_ME_CHECK_MODIFIED
(modified, x1.includeI(home,diff));
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}
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{
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GlbRanges<View2>
lb2(x2);
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LubRanges<View1>
ub1(x1);
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Iter::Ranges::Diff<GlbRanges<View2>
,
LubRanges<View1>
>
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diff(lb2,ub1);
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GECODE_ME_CHECK_MODIFIED
(modified, x0.includeI(home,diff));
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}
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}
else
{
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modified =
false
;
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}
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// cardinality propagation
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if
(modified ||
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Rel::testSetEventCard
(me0,me1,me2) ||
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Rel::testSetEventLB
(me0,me1)
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) {
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GlbRanges<View0>
lb0c(x0);
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GlbRanges<View1>
lb1c(x1);
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Iter::Ranges::Inter<GlbRanges<View0>
,
GlbRanges<View1>
>
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inter
(lb0c,lb1c);
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unsigned
int
m =
Iter::Ranges::size
(
inter
);
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if
(m < x0.cardMax()+x1.cardMax()) {
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GECODE_ME_CHECK_MODIFIED
(modified,
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x2.cardMax( home,
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x0.cardMax()+x1.cardMax() - m ) );
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}
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if
(m + x2.cardMin() > x1.cardMax()) {
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GECODE_ME_CHECK_MODIFIED
(modified,
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x0.cardMin( home,
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m+x2.cardMin()-x1.cardMax() ) );
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}
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if
(m + x2.cardMin() > x0.cardMax()) {
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GECODE_ME_CHECK_MODIFIED
(modified,
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x1.cardMin( home,
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m+x2.cardMin()-x0.cardMax() ) );
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}
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}
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}
while
(modified);
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if
(
shared
(x0,x1,x2)) {
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if
(allassigned) {
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return
home.
ES_SUBSUMED
(*
this
);
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}
else
{
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return
ES_NOFIX
;
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}
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}
else
{
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if
(x0.assigned() + x1.assigned() + x2.assigned() >= 2) {
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return
home.
ES_SUBSUMED
(*
this
);
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}
else
{
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return
ES_FIX
;
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}
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}
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}
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template
<
class
View0,
class
View1,
class
View2>
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forceinline
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SubOfUnion<View0,View1,View2>::SubOfUnion
(
Home
home, View0 y0,
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View1 y1, View2 y2)
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:
MixTernaryPropagator
<View0,
PC_SET_ANY
,View1,
PC_SET_ANY
,
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View2,
PC_SET_ANY
>(home,y0,y1,y2) {}
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template
<
class
View0,
class
View1,
class
View2>
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forceinline
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SubOfUnion<View0,View1,View2>::SubOfUnion
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(
Space
& home,
SubOfUnion<View0,View1,View2>
&
p
)
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:
MixTernaryPropagator
<View0,
PC_SET_ANY
,View1,
PC_SET_ANY
,
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View2,
PC_SET_ANY
>(home,
p
) {}
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template
<
class
View0,
class
View1,
class
View2>
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ExecStatus
SubOfUnion<View0,View1,View2>::post
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(
Home
home, View0 x0, View1 x1, View2 x2) {
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(void)
new
(home)
SubOfUnion<View0,View1,View2>
(home,x0, x1, x2);
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return
ES_OK
;
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}
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}}}
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// STATISTICS: set-prop
Gecode::Set::RelOp::SubOfUnion::copy
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition:
subofunion.hpp:44
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::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3563
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::SubOfUnion
Propagator for the subset of union
Definition:
rel-op.hh:91
Gecode::Set::RelOp::shared
bool shared(View0 v0, View1 v1, View2 v2)
Definition:
common.hpp:84
Gecode::Space
Computation spaces.
Definition:
core.hpp:1742
Gecode::Set::RelOp::SubOfUnion::SubOfUnion
SubOfUnion(Space &home, SubOfUnion &p)
Constructor for cloning p.
Definition:
subofunion.hpp:149
Gecode::MixTernaryPropagator
Mixed ternary propagator.
Definition:
pattern.hpp:237
Gecode::Set::Rel::testSetEventCard
bool testSetEventCard(ModEvent me0, ModEvent me1, ModEvent me2)
Definition:
common.hpp:95
Gecode
Gecode toplevel namespace
u
union Gecode::@602::NNF::@65 u
Union depending on nodetype t.
Gecode::Set::Rel::testSetEventUB
bool testSetEventUB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition:
common.hpp:87
Gecode::Home
Home class for posting propagators
Definition:
core.hpp:856
Gecode::Iter::Ranges::Inter
Range iterator for computing intersection (binary)
Definition:
ranges-inter.hpp:44
Gecode::Set::RelOp::SubOfUnion::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition:
subofunion.hpp:50
Gecode::Iter::Ranges::Diff
Range iterator for computing set difference.
Definition:
ranges-diff.hpp:43
Gecode::Set::GlbRanges
Range iterator for the greatest lower bound.
Definition:
var-imp.hpp:359
Gecode::Set::RelOp::SubOfUnion::post
static ExecStatus post(Home home, View0 x, View1 y, View2 z)
Post propagator .
Definition:
subofunion.hpp:155
Gecode::ModEvent
int ModEvent
Type for modification events.
Definition:
core.hpp:62
Gecode::Iter::Ranges::Union
Range iterator for computing union (binary)
Definition:
ranges-union.hpp:44
Gecode::Set::Rel::testSetEventAnyB
bool testSetEventAnyB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition:
common.hpp:91
Gecode::ES_FIX
@ ES_FIX
Propagation has computed fixpoint.
Definition:
core.hpp:477
Gecode::Set::LubRanges
Range iterator for the least upper bound.
Definition:
var-imp.hpp:317
forceinline
#define forceinline
Definition:
config.hpp:185
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_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition:
macros.hpp:52
Gecode::Set::Rel::testSetEventLB
bool testSetEventLB(ModEvent me0, ModEvent me1, ModEvent me2)
Definition:
common.hpp:83
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition:
core.hpp:89
Gecode::ES_NOFIX
@ ES_NOFIX
Propagation has not computed fixpoint.
Definition:
core.hpp:475
Gecode::inter
SetExpr inter(const SetVarArgs &x)
Intersection of set variables.
Definition:
set-expr.cpp:696
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition:
core.hpp:476
p
int p
Number of positive literals for node type.
Definition:
bool-expr.cpp:232
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:472