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gecode
int
nvalues
int-gq.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, 2011
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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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#include <
gecode/int/rel.hh
>
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#include <
gecode/int/distinct.hh
>
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namespace
Gecode
{
namespace
Int {
namespace
NValues {
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template
<
class
VY>
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forceinline
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GqInt<VY>::GqInt
(
Home
home,
ValSet
& vs,
ViewArray<IntView>
&
x
, VY
y
)
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:
IntBase
<VY>(home,vs,
x
,
y
) {}
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template
<
class
VY>
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inline
ExecStatus
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GqInt<VY>::post
(
Home
home,
ViewArray<IntView>
&
x
, VY
y
) {
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if
(
x
.size() == 0) {
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GECODE_ME_CHECK
(
y
.lq(home,0));
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return
ES_OK
;
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}
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x
.unique();
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if
(
x
.size() == 1) {
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GECODE_ME_CHECK
(
y
.lq(home,1));
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return
ES_OK
;
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}
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GECODE_ME_CHECK
(
y
.lq(home,
x
.size()));
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if
(
y
.max() <= 1)
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return
ES_OK
;
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if
(
y
.min() ==
x
.size()) {
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assert(
y
.
assigned
());
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return
Distinct::Dom<IntView>::post
(home,
x
);
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}
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// Eliminate assigned views and store them into the value set
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ValSet
vs;
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int
n
=
x
.size();
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for
(
int
i
=
n
;
i
--; )
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if
(
x
[
i
].
assigned
()) {
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vs.
add
(home,
x
[
i
].val());
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x
[
i
] =
x
[--
n
];
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}
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GECODE_ME_CHECK
(
y
.lq(home,
n
+ vs.
size
()));
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if
(
n
== 0) {
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assert(vs.
size
() >=
y
.max());
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return
ES_OK
;
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}
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x
.size(
n
);
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(void)
new
(home)
GqInt<VY>
(home, vs,
x
,
y
);
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return
ES_OK
;
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}
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template
<
class
VY>
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forceinline
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GqInt<VY>::GqInt
(
Space
& home,
GqInt<VY>
&
p
)
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:
IntBase
<VY>(home,
p
) {}
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template
<
class
VY>
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Propagator
*
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GqInt<VY>::copy
(
Space
& home) {
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return
new
(home)
GqInt<VY>
(home, *
this
);
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}
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template
<
class
VY>
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ExecStatus
104
GqInt<VY>::propagate
(
Space
& home,
const
ModEventDelta
& med) {
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if
(
IntView::me
(med) ==
ME_INT_VAL
)
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add(home);
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// Eliminate subsumed views
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eliminate
(home);
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GECODE_ME_CHECK
(
y
.lq(home,
x
.size() + vs.size()));
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if
(
x
.size() == 0)
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return
home.
ES_SUBSUMED
(*
this
);
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if
(vs.size() >=
y
.max())
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return
home.
ES_SUBSUMED
(*
this
);
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GECODE_ES_CHECK
(prune_upper(home,g));
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return
ES_NOFIX
;
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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::y
Post propagator for SetVar SetOpType SetVar y
Definition:
set.hh:767
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3563
Gecode::Int::Distinct::Dom::post
static ExecStatus post(Home home, ViewArray< View > &x)
Post propagator for views x.
Definition:
dom.hpp:45
Gecode::Int::ValSet
Class for storing values of already assigned views.
Definition:
val-set.hh:44
distinct.hh
Gecode::Int::Precede::assigned
bool assigned(View x, int v)
Whether x is assigned to value v.
Definition:
single.hpp:43
Gecode::Int::NValues::GqInt::GqInt
GqInt(Home home, ValSet &vs, ViewArray< IntView > &x, VY y)
Constructor for posting.
Definition:
int-gq.hpp:41
Gecode::Int::NValues::IntBase
Number of values propagator for integer views base class.
Definition:
nvalues.hh:133
Gecode::Space
Computation spaces.
Definition:
core.hpp:1742
Gecode::VarImpVar::assigned
bool assigned(void) const
Test whether view is assigned.
Definition:
var.hpp:111
Gecode::Int::ME_INT_VAL
const Gecode::ModEvent ME_INT_VAL
Domain operation has resulted in a value (assigned variable)
Definition:
var-type.hpp:56
Gecode::Int::Linear::eliminate
void eliminate(Term< BoolView > *t, int &n, long long int &d)
Eliminate assigned views.
Definition:
bool-post.cpp:43
Gecode::Int::NValues::GqInt::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition:
int-gq.hpp:104
Gecode
Gecode toplevel namespace
Gecode::Propagator
Base-class for propagators.
Definition:
core.hpp:1064
Gecode::Int::ValSet::size
int size(void) const
Return size (number of values)
Definition:
val-set.hpp:81
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::VarImpView< IntVar >::me
static ModEvent me(const ModEventDelta &med)
Return modification event for view type in med.
Definition:
view.hpp:552
rel.hh
Gecode::Int::NValues::GqInt::post
static ExecStatus post(Home home, ViewArray< IntView > &x, VY y)
Post propagator for .
Definition:
int-gq.hpp:46
forceinline
#define forceinline
Definition:
config.hpp:192
Gecode::Int::NValues::GqInt::copy
virtual Propagator * copy(Space &home)
Copy propagator during cloning.
Definition:
int-gq.hpp:98
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition:
macros.hpp:52
Gecode::ViewArray< IntView >
n
int n
Number of negative literals for node type.
Definition:
bool-expr.cpp:234
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
Test::Int::Basic::i
Gecode::IntArgs i({1, 2, 3, 4})
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::ValSet::add
void add(Space &home, int v)
Add value v to value set.
Definition:
val-set.hpp:45
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:472
Gecode::Int::NValues::GqInt
Greater or equal to number of values propagator for integer views.
Definition:
nvalues.hh:251