main page
modules
namespaces
classes
files
Gecode home
Generated on Mon Feb 8 2021 00:00:00 for Gecode by
doxygen
1.8.20
gecode
int
channel
link-single.cpp
Go to the documentation of this file.
1
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2
/*
3
* Main authors:
4
* Christian Schulte <schulte@gecode.org>
5
*
6
* Copyright:
7
* Christian Schulte, 2007
8
*
9
* This file is part of Gecode, the generic constraint
10
* development environment:
11
* http://www.gecode.org
12
*
13
* Permission is hereby granted, free of charge, to any person obtaining
14
* a copy of this software and associated documentation files (the
15
* "Software"), to deal in the Software without restriction, including
16
* without limitation the rights to use, copy, modify, merge, publish,
17
* distribute, sublicense, and/or sell copies of the Software, and to
18
* permit persons to whom the Software is furnished to do so, subject to
19
* the following conditions:
20
*
21
* The above copyright notice and this permission notice shall be
22
* included in all copies or substantial portions of the Software.
23
*
24
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31
*
32
*/
33
34
#include <
gecode/int/channel.hh
>
35
36
namespace
Gecode
{
namespace
Int {
namespace
Channel {
37
38
forceinline
39
LinkSingle::LinkSingle(Space& home, LinkSingle&
p
)
40
: MixBinaryPropagator<BoolView,
PC_BOOL_VAL
,IntView,
PC_INT_VAL
>
41
(home,
p
) {}
42
43
Actor*
44
LinkSingle::copy
(
Space
& home) {
45
return
new
(home)
LinkSingle
(home,*
this
);
46
}
47
48
PropCost
49
LinkSingle::cost
(
const
Space
&,
const
ModEventDelta
&)
const
{
50
return
PropCost::unary
(
PropCost::LO
);
51
}
52
53
ExecStatus
54
LinkSingle::propagate
(
Space
& home,
const
ModEventDelta
&) {
55
if
(
x0
.
zero
()) {
56
GECODE_ME_CHECK
(
x1
.
eq
(home,0));
57
}
else
if
(
x0
.
one
()) {
58
GECODE_ME_CHECK
(
x1
.
eq
(home,1));
59
}
else
{
60
assert(
x0
.
none
() &&
x1
.
assigned
());
61
if
(
x1
.
val
() == 0) {
62
GECODE_ME_CHECK
(
x0
.
zero_none
(home));
63
}
else
{
64
assert(
x1
.
val
() == 1);
65
GECODE_ME_CHECK
(
x0
.
one_none
(home));
66
}
67
}
68
return
home.
ES_SUBSUMED
(*
this
);
69
}
70
71
}}}
72
73
// STATISTICS: int-prop
Gecode::Int::BoolView::zero
bool zero(void) const
Test whether view is assigned to be zero.
Definition:
bool.hpp:220
Gecode::Int::PC_BOOL_VAL
const Gecode::PropCond PC_BOOL_VAL
Propagate when a view becomes assigned (single value)
Definition:
var-type.hpp:126
Gecode::VarImpView::assigned
bool assigned(void) const
Test whether view is assigned.
Definition:
view.hpp:516
Gecode::Space::ES_SUBSUMED
ExecStatus ES_SUBSUMED(Propagator &p)
Definition:
core.hpp:3563
Gecode::MixBinaryPropagator< BoolView, PC_BOOL_VAL, IntView, PC_INT_VAL >::x0
BoolView x0
View of type View0.
Definition:
pattern.hpp:207
Gecode::Int::BoolView::one
bool one(void) const
Test whether view is assigned to be one.
Definition:
bool.hpp:224
Gecode::PropCost::LO
@ LO
Cheap.
Definition:
core.hpp:513
Gecode::Space
Computation spaces.
Definition:
core.hpp:1742
Gecode::Int::Channel::LinkSingle
Link propagator for a single Boolean view.
Definition:
channel.hh:171
Gecode::MixBinaryPropagator< BoolView, PC_BOOL_VAL, IntView, PC_INT_VAL >::x1
IntView x1
View of type View1.
Definition:
pattern.hpp:209
Gecode::Int::BoolView::one_none
ModEvent one_none(Space &home)
Assign not yet assigned view to one.
Definition:
bool.hpp:242
Gecode
Gecode toplevel namespace
Gecode::Int::BoolView::none
bool none(void) const
Test whether view is not yet assigned.
Definition:
bool.hpp:228
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:238
Gecode::Int::Channel::LinkSingle::copy
virtual Actor * copy(Space &home)
Copy propagator during cloning.
Definition:
link-single.cpp:44
Gecode::PropCost::unary
static PropCost unary(PropCost::Mod m)
Single variable for modifier pcm.
Definition:
core.hpp:4813
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:49
channel.hh
Gecode::Int::Channel::LinkSingle::propagate
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition:
link-single.cpp:54
Gecode::PropCost
Propagation cost.
Definition:
core.hpp:486
Gecode::Int::PC_INT_VAL
const Gecode::PropCond PC_INT_VAL
Propagate when a view becomes assigned (single value)
Definition:
var-type.hpp:82
forceinline
#define forceinline
Definition:
config.hpp:192
GECODE_ME_CHECK
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition:
macros.hpp:52
Gecode::ModEventDelta
int ModEventDelta
Modification event deltas.
Definition:
core.hpp:89
p
int p
Number of positive literals for node type.
Definition:
bool-expr.cpp:232
Gecode::Int::IntView::eq
ModEvent eq(Space &home, int n)
Restrict domain values to be equal to n.
Definition:
int.hpp:166
Gecode::ExecStatus
ExecStatus
Definition:
core.hpp:472