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gecode
int
channel
link-single.cpp
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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: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $
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* $Revision: 10364 $
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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/channel.hh
>
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namespace
Gecode
{
namespace
Int {
namespace
Channel {
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forceinline
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LinkSingle::LinkSingle(Space& home,
bool
share, LinkSingle&
p
)
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: MixBinaryPropagator<BoolView,
PC_BOOL_VAL
,IntView,
PC_INT_VAL
>
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(home,share,
p
) {}
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Actor*
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LinkSingle::copy
(
Space
& home,
bool
share) {
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return
new
(home)
LinkSingle
(home,share,*
this
);
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}
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PropCost
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LinkSingle::cost
(
const
Space
&,
const
ModEventDelta
&)
const
{
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return
PropCost::unary
(
PropCost::LO
);
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}
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ExecStatus
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LinkSingle::propagate
(
Space
& home,
const
ModEventDelta
&) {
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if
(
x0
.
zero
()) {
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GECODE_ME_CHECK
(
x1
.
eq
(home,0));
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}
else
if
(
x0
.
one
()) {
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GECODE_ME_CHECK
(
x1
.
eq
(home,1));
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}
else
{
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assert(
x0
.
none
() &&
x1
.
assigned
());
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if
(
x1
.
val
() == 0) {
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GECODE_ME_CHECK
(
x0
.
zero_none
(home));
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}
else
{
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assert(
x1
.
val
() == 1);
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GECODE_ME_CHECK
(
x0
.
one_none
(home));
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}
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}
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return
home.
ES_SUBSUMED
(*
this
);
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}
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}}}
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// STATISTICS: int-prop
Gecode::Int::BoolView::zero
bool zero(void) const
Test whether view is assigned to be zero.
Definition:
bool.hpp:214
Gecode::Int::PC_BOOL_VAL
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value)
Definition:
var-type.hpp:126
forceinline
#define forceinline
Definition:
config.hpp:173
Gecode::VarImpView::assigned
bool assigned(void) const
Test whether view is assigned.
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3614
Gecode::MixBinaryPropagator< BoolView, PC_BOOL_VAL, IntView, PC_INT_VAL >::x0
BoolView x0
View of type View0.
Definition:
propagator.hpp:216
Gecode::Int::Channel::LinkSingle::copy
virtual Actor * copy(Space &home, bool share)
Copy propagator during cloning.
Definition:
link-single.cpp:48
Gecode::Int::BoolView::one
bool one(void) const
Test whether view is assigned to be one.
Definition:
bool.hpp:218
Gecode::PropCost::LO
@ LO
Cheap.
Definition:
core.hpp:581
Gecode::Space
Computation spaces.
Definition:
core.hpp:1748
Gecode::Int::Channel::LinkSingle
Link propagator for a single Boolean view.
Definition:
channel.hh:174
Gecode::MixBinaryPropagator< BoolView, PC_BOOL_VAL, IntView, PC_INT_VAL >::x1
IntView x1
View of type View1.
Definition:
propagator.hpp:218
Gecode::Int::BoolView::one_none
ModEvent one_none(Space &home)
Assign not yet assigned view to one.
Definition:
bool.hpp:236
Gecode
Gecode toplevel namespace
Gecode::Int::BoolView::none
bool none(void) const
Test whether view is not yet assigned.
Definition:
bool.hpp:222
Gecode::Int::IntView::val
int val(void) const
Return assigned value (only if assigned)
Definition:
int.hpp:70
Gecode::Int::BoolView::zero_none
ModEvent zero_none(Space &home)
Assign not yet assigned view to zero.
Definition:
bool.hpp:232
Gecode::PropCost::unary
static PropCost unary(PropCost::Mod m)
Single variable for modifier pcm.
Definition:
core.hpp:4858
Gecode::Int::Channel::LinkSingle::cost
virtual PropCost cost(const Space &home, const ModEventDelta &med) const
Cost function (defined as low unary)
Definition:
link-single.cpp:53
channel.hh
Gecode::Int::Channel::LinkSingle::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition:
link-single.cpp:58
Gecode::PropCost
Propagation cost.
Definition:
core.hpp:554
Gecode::Int::PC_INT_VAL
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value)
Definition:
var-type.hpp:82
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition:
macros.hpp:56
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition:
core.hpp:169
p
int p
Number of positive literals for node type.
Definition:
bool-expr.cpp:236
Gecode::Int::IntView::eq
ModEvent eq(Space &home, int n)
Restrict domain values to be equal to n.
Definition:
int.hpp:160
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:540