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dekker.one
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
47 forceinline
48 SeqU::SeqU(Home home, ViewArray<SetView>& x, SetView y)
49 : NaryOnePropagator<SetView,PC_SET_ANY>(home,x, y) {}
50
51 forceinline
52 SeqU::SeqU(Space& home, SeqU& p)
53 : NaryOnePropagator<SetView,PC_SET_ANY>(home,p) {
54 unionOfDets.update(home, p.unionOfDets);
55 }
56
57 forceinline ExecStatus
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