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cardinality.cpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Gabor Szokoli <szokoli@gecode.org>
5 * Guido Tack <tack@gecode.org>
6 * Christian Schulte <schulte@gecode.org>
7 *
8 * Copyright:
9 * Gabor Szokoli, 2004
10 * Guido Tack, 2004
11 * Christian Schulte, 2004
12 *
13 * This file is part of Gecode, the generic constraint
14 * development environment:
15 * http://www.gecode.org
16 *
17 * Permission is hereby granted, free of charge, to any person obtaining
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37
38#include <gecode/set.hh>
39#include <gecode/set/int.hh>
40
41namespace Gecode {
42
43 void
44 cardinality(Home home, SetVar x, unsigned int i, unsigned int j) {
45 Set::Limits::check(i, "Set::cardinality");
46 Set::Limits::check(j, "Set::cardinality");
48 Set::SetView _x(x);
49 GECODE_ME_FAIL(_x.cardMin(home, i));
50 GECODE_ME_FAIL(_x.cardMax(home, j));
51 }
52
53 void
54 cardinality(Home home, const SetVarArgs& x, unsigned int i, unsigned int j) {
55 Set::Limits::check(i, "Set::cardinality");
56 Set::Limits::check(j, "Set::cardinality");
58 for (int k=x.size(); k--; ) {
59 Set::SetView _x(x[k]);
60 GECODE_ME_FAIL(_x.cardMin(home, i));
61 GECODE_ME_FAIL(_x.cardMax(home, j));
62 }
63 }
64
65 void
70
71 void
73 IntVar y(home, 0, static_cast<int>(Set::Limits::card));
74 rel(home, x, IRT_EQ, y, r);
75 cardinality(home, s, y);
76 }
77
78}
79
80// STATISTICS: set-post
Home class for posting propagators
Definition core.hpp:856
Integer variables.
Definition int.hh:371
Reification specification.
Definition int.hh:876
Passing set variables.
Definition set.hh:488
Set variables
Definition set.hh:127
Propagator for cardinality
Definition int.hh:231
Set view for set variables
Definition view.hpp:56
#define GECODE_POST
Check for failure in a constraint post function.
Definition macros.hpp:40
#define GECODE_ES_FAIL(es)
Check whether execution status es is failed, and fail space home.
Definition macros.hpp:103
#define GECODE_ME_FAIL(me)
Check whether modification event me is failed, and fail space home.
Definition macros.hpp:77
void rel(Home home, FloatVar x0, FloatRelType frt, FloatVar x1)
Post propagator for .
Definition rel.cpp:68
@ IRT_EQ
Equality ( )
Definition int.hh:926
void check(int n, const char *l)
Check whether integer n is in range, otherwise throw overflow exception with information l.
Definition limits.hpp:37
const unsigned int card
Maximum cardinality of an integer set.
Definition set.hh:101
Gecode toplevel namespace
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition set.hh:767
Post propagator for SetVar SetOpType SetVar y
Definition set.hh:767
LinIntExpr cardinality(const SetExpr &)
Cardinality of set expression.
Definition set-expr.cpp:817
Post propagator for SetVar x
Definition set.hh:767