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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 Rel {
41
42 template<class View0, class View1>
43 forceinline
44 Eq<View0,View1>::Eq(Home home, View0 x, View1 y)
45 : MixBinaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY>(home,x,y) {}
46
47 template<class View0, class View1>
48 forceinline
49 Eq<View0,View1>::Eq(Space& home, Eq& p)
50 : MixBinaryPropagator<View0,PC_SET_ANY,View1,PC_SET_ANY>(home,p) {}
51
52 template<class View0, class View1>
53 ExecStatus
54 Eq<View0,View1>::post(Home home, View0 x, View1 y) {
55 if (!same(x,y))
56 (void) new (home) Eq(home,x,y);
57 return ES_OK;
58 }
59
60 template<class View0, class View1>
61 Actor*
62 Eq<View0,View1>::copy(Space& home) {
63 return new (home) Eq(home,*this);
64 }
65
66 template<class View0, class View1>
67 ExecStatus
68 Eq<View0,View1>::propagate(Space& home, const ModEventDelta& med) {
69
70 ModEvent me0 = View0::me(med);
71 ModEvent me1 = View1::me(med);
72
73 Region r;
74
75 if (testSetEventLB(me0,me1)) {
76 GlbRanges<View0> x0lb(x0);
77 GlbRanges<View1> x1lb(x1);
78 Iter::Ranges::Union<GlbRanges<View0>,GlbRanges<View1> > lbu(x0lb,x1lb);
79 Iter::Ranges::Cache lbuc(r,lbu);
80 GECODE_ME_CHECK(x0.includeI(home,lbuc));
81 lbuc.reset();
82 GECODE_ME_CHECK(x1.includeI(home,lbuc));
83 }
84
85 if (testSetEventUB(me0,me1)) {
86 LubRanges<View0> x0ub(x0);
87 LubRanges<View1> x1ub(x1);
88 Iter::Ranges::Inter<LubRanges<View0>,LubRanges<View1> > ubi(x0ub,x1ub);
89 Iter::Ranges::Cache ubic(r,ubi);
90 GECODE_ME_CHECK(x0.intersectI(home,ubic));
91 ubic.reset();
92 GECODE_ME_CHECK(x1.intersectI(home,ubic));
93 }
94
95 if (testSetEventCard(me0,me1)) {
96 unsigned int max = std::min(x0.cardMax(),x1.cardMax());
97 unsigned int min = std::max(x0.cardMin(),x1.cardMin());
98 GECODE_ME_CHECK(x0.cardMax(home,max));
99 GECODE_ME_CHECK(x1.cardMax(home,max));
100 GECODE_ME_CHECK(x0.cardMin(home,min));
101 GECODE_ME_CHECK(x1.cardMin(home,min));
102 }
103
104 if (x0.assigned()) {
105 assert (x1.assigned());
106 return home.ES_SUBSUMED(*this);
107 }
108 return shared(x0,x1) ? ES_NOFIX : ES_FIX;
109 }
110
111}}}
112
113// STATISTICS: set-prop