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gecode
int
count
view-lq.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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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2003
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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
Int {
namespace
Count {
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr>
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forceinline
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LqView<VX,VY,VZ,shr>::LqView
(
Home
home,
ViewArray<VX>
&
x
,
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VY
y
, VZ
z
,
int
c
)
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:
ViewBase
<VX,VY,VZ>(home,
x
,
y
,
z
,
c
) {}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr>
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ExecStatus
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LqView<VX,VY,VZ,shr>::post
(
Home
home,
ViewArray<VX>
&
x
,
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VY
y
, VZ
z
,
int
c
) {
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GECODE_ME_CHECK
(
z
.gq(home,-
c
));
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if
(
z
.
assigned
())
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return
LqInt<VX,VY>::post
(home,
x
,
y
,
z
.val()+
c
);
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if
(sharing(
x
,
y
,
z
))
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(void)
new
(home)
LqView<VX,VY,VZ,true>
(home,
x
,
y
,
z
,
c
);
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else
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(
void
)
new
(home)
LqView<VX,VY,VZ,false>
(home,
x
,
y
,
z
,
c
);
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return
ES_OK
;
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}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr>
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forceinline
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LqView<VX,VY,VZ,shr>::LqView
(
Space
& home,
LqView<VX,VY,VZ,shr>
&
p
)
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:
ViewBase
<VX,VY,VZ>(home,
p
) {}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr>
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Actor
*
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LqView<VX,VY,VZ,shr>::copy
(
Space
& home) {
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return
new
(home)
LqView<VX,VY,VZ,shr>
(home,*
this
);
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}
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template
<
class
VX,
class
VY,
class
VZ,
bool
shr>
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ExecStatus
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LqView<VX,VY,VZ,shr>::propagate
(
Space
& home,
const
ModEventDelta
&) {
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count
(home);
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GECODE_ME_CHECK
(
z
.gq(home,
atleast
()));
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if
(
z
.max() ==
atleast
()) {
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GECODE_ES_CHECK
(
post_false
(home,
x
,
y
));
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return
home.
ES_SUBSUMED
(*
this
);
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}
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if
(
x
.size() == 0)
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return
home.
ES_SUBSUMED
(*
this
);
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if
(
z
.
assigned
()) {
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VY yc(
y
);
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GECODE_REWRITE
(*
this
,(
LqInt<VX,VY>::post
(home(*
this
),
x
,yc,
z
.val()+
c
)));
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}
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return
shr ?
ES_NOFIX
:
ES_FIX
;
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}
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}}}
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// STATISTICS: int-prop
Gecode::x
Post propagator for SetVar x
Definition:
set.hh:767
Gecode::Int::Count::LqInt::post
static ExecStatus post(Home home, ViewArray< VX > &x, VY y, int c)
Post propagator for .
Definition:
int-lq.hpp:43
Gecode::y
Post propagator for SetVar SetOpType SetVar y
Definition:
set.hh:767
Gecode::Int::Count::LqView::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition:
view-lq.hpp:69
Gecode::Int::Count::LqView
Propagator for counting views (less or equal to number of equal views)
Definition:
count.hh:344
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3563
Gecode::Int::Count::LqInt
Propagator for counting views (less or equal integer to number of equal views)
Definition:
count.hh:232
Gecode::Int::Count::ViewBase
Base-class for count propagators (view)
Definition:
count.hh:266
Gecode::atleast
void atleast(Home home, const IntVarArgs &x, int n, int m, IntPropLevel ipl)
Post constraint .
Definition:
aliases.hpp:70
Gecode::z
Post propagator for SetVar SetOpType SetVar SetRelType SetVar z
Definition:
set.hh:767
Gecode::Int::Count::post_false
ExecStatus post_false(Home home, VX x, ConstIntView y)
Definition:
rel.hpp:194
Gecode::Space
Computation spaces.
Definition:
core.hpp:1742
Gecode::Actor
Base-class for both propagators and branchers.
Definition:
core.hpp:628
Gecode::VarImpVar::assigned
bool assigned(void) const
Test whether view is assigned.
Definition:
var.hpp:111
Gecode
Gecode toplevel namespace
Gecode::Int::Count::LqView::post
static ExecStatus post(Home home, ViewArray< VX > &x, VY y, VZ z, int c)
Post propagator for .
Definition:
view-lq.hpp:44
GECODE_ES_CHECK
#define GECODE_ES_CHECK(es)
Check whether execution status es is failed or subsumed, and forward failure or subsumption.
Definition:
macros.hpp:91
Gecode::Home
Home class for posting propagators
Definition:
core.hpp:856
Gecode::count
void count(Home home, const IntVarArgs &x, int n, IntRelType irt, int m, IntPropLevel)
Post propagator for .
Definition:
count.cpp:40
Gecode::ES_FIX
@ ES_FIX
Propagation has computed fixpoint.
Definition:
core.hpp:477
forceinline
#define forceinline
Definition:
config.hpp:185
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition:
macros.hpp:52
Test::Float::Arithmetic::c
Gecode::FloatVal c(-8, 8)
Gecode::ViewArray< VX >
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_REWRITE
#define GECODE_REWRITE(prop, post)
Rewrite propagator by executing post function.
Definition:
macros.hpp:116
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::Int::Count::LqView::LqView
LqView(Space &home, LqView &p)
Constructor for cloning p.
Definition:
view-lq.hpp:58
Gecode::Int::Count::LqView::copy
virtual Actor * copy(Space &home)
Create copy during cloning.
Definition:
view-lq.hpp:63
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:472