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gecode
int
circuit
val.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, 2007
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*
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* Last modified:
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* $Date: 2011-05-25 16:56:41 +0200 (Wed, 25 May 2011) $ by $Author: schulte $
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* $Revision: 12022 $
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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
Circuit {
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/*
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* The actual propagator
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*
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*/
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template
<
class
View,
class
Offset>
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forceinline
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Val<View,Offset>::Val
(
Home
home,
ViewArray<View>
&
x
,
Offset
& o)
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:
Base
<View,
Offset
>(home,
x
,o) {}
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template
<
class
View,
class
Offset>
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forceinline
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Val<View,Offset>::Val
(
Space
& home,
bool
share,
Val<View,Offset>
&
p
)
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:
Base
<View,
Offset
>(home,share,
p
) {}
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template
<
class
View,
class
Offset>
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Actor
*
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Val<View,Offset>::copy
(
Space
& home,
bool
share) {
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return
new
(home)
Val<View,Offset>
(home,share,*
this
);
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}
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template
<
class
View,
class
Offset>
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PropCost
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Val<View,Offset>::cost
(
const
Space
&,
const
ModEventDelta
&)
const
{
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return
PropCost::linear
(
PropCost::HI
,
x
.size());
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}
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template
<
class
View,
class
Offset>
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ExecStatus
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Val<View,Offset>::propagate
(
Space
& home,
const
ModEventDelta
&) {
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GECODE_ES_CHECK
((Int::Distinct::prop_val<View,true>(home,
y
)));
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ExecStatus
esc = connected(home);
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if
(esc !=
ES_FIX
)
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return
esc;
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/*
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* One cannot have a single unassigned view as the views constitute
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* a permutation.
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*/
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if
(
y
.size() < 2)
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return
home.
ES_SUBSUMED
(*
this
);
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return
path
(home);
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}
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template
<
class
View,
class
Offset>
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ExecStatus
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Val<View,Offset>::post
(
Home
home,
ViewArray<View>
&
x
,
Offset
& o) {
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int
n
=
x
.size();
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if
(
n
== 1) {
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GECODE_ME_CHECK
(o(
x
[0]).eq(home,0));
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}
else
if
(
n
== 2) {
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GECODE_ME_CHECK
(o(
x
[0]).eq(home,1));
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GECODE_ME_CHECK
(o(
x
[1]).eq(home,0));
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}
else
{
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for
(
int
i
=
n
;
i
--; ) {
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GECODE_ME_CHECK
(o(
x
[
i
]).gq(home,0));
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GECODE_ME_CHECK
(o(
x
[
i
]).le(home,
n
));
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GECODE_ME_CHECK
(o(
x
[
i
]).nq(home,
i
));
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}
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(void)
new
(home)
Val<View,Offset>
(home,
x
,o);
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}
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return
ES_OK
;
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}
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}}}
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// STATISTICS: int-prop
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Gecode::x
Post propagator for SetVar x
Definition:
set.hh:784
Gecode::y
Post propagator for SetVar SetOpType SetVar y
Definition:
set.hh:784
forceinline
#define forceinline
Definition:
config.hpp:173
Gecode::Int::Offset
Converter with fixed offset.
Definition:
view.hpp:617
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3614
Gecode::Int::Circuit::Val::copy
virtual Actor * copy(Space &home, bool share)
Copy propagator during cloning.
Definition:
val.hpp:56
Gecode::Int::Circuit::Val::post
static ExecStatus post(Home home, ViewArray< View > &x, Offset &o)
Post propagator for circuit on x.
Definition:
val.hpp:84
Test::Int::Basic::i
Gecode::IntArgs i(4, 1, 2, 3, 4)
Gecode::Space
Computation spaces.
Definition:
core.hpp:1748
Gecode::PropCost::linear
static PropCost linear(PropCost::Mod m, unsigned int n)
Linear complexity for modifier pcm and size measure n.
Definition:
core.hpp:4841
Gecode::Actor
Base-class for both propagators and branchers.
Definition:
core.hpp:696
Gecode::Int::Circuit::Val::cost
virtual PropCost cost(const Space &home, const ModEventDelta &med) const
Cost function (returns high linear)
Definition:
val.hpp:62
Gecode
Gecode toplevel namespace
Gecode::Int::Circuit::Base
Base-class for circuit propagator.
Definition:
circuit.hh:59
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:95
Gecode::Home
Home class for posting propagators
Definition:
core.hpp:922
Gecode::PropCost
Propagation cost.
Definition:
core.hpp:554
Gecode::ES_FIX
@ ES_FIX
Propagation has computed fixpoint.
Definition:
core.hpp:545
Gecode::path
void path(Home home, int offset, const IntVarArgs &x, IntVar s, IntVar e, IntPropLevel ipl)
Post propagator such that x forms a Hamiltonian path.
Definition:
circuit.cpp:128
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition:
macros.hpp:56
Gecode::PropCost::HI
@ HI
Expensive.
Definition:
core.hpp:582
Gecode::ViewArray
View arrays.
Definition:
array.hpp:234
Gecode::Int::Circuit::Val
"Value-consistent" circuit propagator
Definition:
circuit.hh:92
n
int n
Number of negative literals for node type.
Definition:
bool-expr.cpp:238
Gecode::Int::Circuit::Val::Val
Val(Space &home, bool share, Val &p)
Constructor for cloning p.
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition:
core.hpp:169
Gecode::Int::Circuit::Val::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition:
val.hpp:68
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition:
core.hpp:544
p
int p
Number of positive literals for node type.
Definition:
bool-expr.cpp:236
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:540