Generated on Sat Feb 7 2015 02:01:30 for Gecode by doxygen 1.8.9.1
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  * Last modified:
16  * $Date: 2012-09-07 17:31:22 +0200 (Fri, 07 Sep 2012) $ by $Author: schulte $
17  * $Revision: 13068 $
18  *
19  * This file is part of Gecode, the generic constraint
20  * development environment:
21  * http://www.gecode.org
22  *
23  * Permission is hereby granted, free of charge, to any person obtaining
24  * a copy of this software and associated documentation files (the
25  * "Software"), to deal in the Software without restriction, including
26  * without limitation the rights to use, copy, modify, merge, publish,
27  * distribute, sublicense, and/or sell copies of the Software, and to
28  * permit persons to whom the Software is furnished to do so, subject to
29  * the following conditions:
30  *
31  * The above copyright notice and this permission notice shall be
32  * included in all copies or substantial portions of the Software.
33  *
34  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
35  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
36  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
37  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
38  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
39  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
40  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
41  *
42  */
43 
44 namespace Gecode { namespace Set { namespace Sequence {
45 
46  /*
47  * "Sequenced union" propagator
48  *
49  */
50 
53  : NaryOnePropagator<SetView,PC_SET_ANY>(home,x, y) {}
54 
56  SeqU::SeqU(Space& home, bool share, SeqU& p)
57  : NaryOnePropagator<SetView,PC_SET_ANY>(home,share,p) {
59  }
60 
63  switch (x.size()) {
64  case 0:
65  GECODE_ME_CHECK(y.cardMax(home, 0));
66  return ES_OK;
67  case 1:
68  return Rel::Eq<SetView,SetView>::post(home, x[0], y);
69  default:
70  if (x.shared(home) || x.shared(home,y))
71  return ES_FAILED;
72  (void) new (home) SeqU(home,x,y);
73  return ES_OK;
74  }
75  }
76 
77 }}}
78 
79 // STATISTICS: set-prop
SeqU(Space &home, bool share, SeqU &p)
Constructor for cloning p.
Definition: seq-u.hpp:56
unsigned int cardMax(void) const
Return maximum cardinality.
Definition: set.hpp:90
static ExecStatus post(Home home, ViewArray< SetView >, SetView)
Post propagator and .
Definition: seq-u.hpp:62
Computation spaces.
Definition: core.hpp:1362
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
Execution has resulted in failure.
Definition: core.hpp:525
bool shared(const Space &home) const
Test whether array contains shared views.
Definition: array.hpp:1511
(n+1)-ary propagator
Definition: propagator.hpp:172
void update(Space &home, BndSet &x)
Update this set to be a clone of set x.
Definition: integerset.hpp:144
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:45
const Gecode::PropCond PC_SET_ANY
Propagate when any bound or the cardinality of a view changes.
Definition: var-type.hpp:248
Set view for set variables
Definition: view.hpp:60
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
ExecStatus
Definition: core.hpp:523
#define forceinline
Definition: config.hpp:132
Execution is okay.
Definition: core.hpp:527
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1215
Gecode toplevel namespace
Propagator for the sequenced union constraint
Definition: sequence.hh:85
Home class for posting propagators
Definition: core.hpp:717
static ExecStatus post(Home home, View0, View1)
Post propagator .
Definition: eq.hpp:58