Generated on Tue Feb 11 2025 17:33:26 for Gecode by doxygen 1.12.0
seq-u.hpp
Go to the documentation of this file.
1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Guido Tack <tack@gecode.org>
5 * Christian Schulte <schulte@gecode.org>
6 *
7 * Contributing authors:
8 * Gabor Szokoli <szokoli@gecode.org>
9 *
10 * Copyright:
11 * Guido Tack, 2004
12 * Christian Schulte, 2004
13 * Gabor Szokoli, 2004
14 *
15 * This file is part of Gecode, the generic constraint
16 * development environment:
17 * http://www.gecode.org
18 *
19 * Permission is hereby granted, free of charge, to any person obtaining
20 * a copy of this software and associated documentation files (the
21 * "Software"), to deal in the Software without restriction, including
22 * without limitation the rights to use, copy, modify, merge, publish,
23 * distribute, sublicense, and/or sell copies of the Software, and to
24 * permit persons to whom the Software is furnished to do so, subject to
25 * the following conditions:
26 *
27 * The above copyright notice and this permission notice shall be
28 * included in all copies or substantial portions of the Software.
29 *
30 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
31 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
32 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
33 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
34 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
35 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
36 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
37 *
38 */
39
40namespace Gecode { namespace Set { namespace Sequence {
41
42 /*
43 * "Sequenced union" propagator
44 *
45 */
46
48 SeqU::SeqU(Home home, ViewArray<SetView>& x, SetView y)
50
52 SeqU::SeqU(Space& home, SeqU& p)
54 unionOfDets.update(home, p.unionOfDets);
55 }
56
58 SeqU::post(Home home, ViewArray<SetView> x, SetView y) {
59 switch (x.size()) {
60 case 0:
61 GECODE_ME_CHECK(y.cardMax(home, 0));
62 return ES_OK;
63 case 1:
64 return Rel::Eq<SetView,SetView>::post(home, x[0], y);
65 default:
66 if (shared(x) || shared(x,y))
67 return ES_FAILED;
68 (void) new (home) SeqU(home,x,y);
69 return ES_OK;
70 }
71 }
72
73}}}
74
75// STATISTICS: set-prop
int p
Number of positive literals for node type.
Home class for posting propagators
Definition core.hpp:856
(n+1)-ary propagator
Definition pattern.hpp:172
void update(Space &home, BndSet &x)
Update this set to be a clone of set x.
static ExecStatus post(Home home, View0 x, View1 y)
Post propagator .
Definition eq.hpp:54
Propagator for the sequenced union constraint
Definition sequence.hh:81
SeqU(Space &home, SeqU &p)
Constructor for cloning p.
Definition seq-u.hpp:52
Set view for set variables
Definition view.hpp:56
unsigned int cardMax(void) const
Return maximum cardinality.
Definition set.hpp:86
Computation spaces.
Definition core.hpp:1742
View arrays.
Definition array.hpp:253
int size(void) const
Return size of array (number of elements)
Definition array.hpp:1156
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition macros.hpp:52
const Gecode::PropCond PC_SET_ANY
Propagate when any bound or the cardinality of a view changes.
Definition var-type.hpp:248
Gecode toplevel namespace
Post propagator for SetVar SetOpType SetVar y
Definition set.hh:767
ExecStatus
Definition core.hpp:472
@ ES_OK
Execution is okay.
Definition core.hpp:476
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474
bool shared(ViewArray< ViewX > x, ViewArray< ViewY > y)
Definition array.hpp:1466
Post propagator for SetVar x
Definition set.hh:767
#define forceinline
Definition config.hpp:187