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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  * Last modified:
14  * $Date: 2017-03-10 10:15:56 +0100 (Fri, 10 Mar 2017) $ by $Author: schulte $
15  * $Revision: 15566 $
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41 
42 #include <gecode/set.hh>
43 #include <gecode/set/int.hh>
44 
45 namespace Gecode {
46 
47  void
48  cardinality(Home home, SetVar x, unsigned int i, unsigned int j) {
49  Set::Limits::check(i, "Set::cardinality");
50  Set::Limits::check(j, "Set::cardinality");
52  Set::SetView _x(x);
53  GECODE_ME_FAIL(_x.cardMin(home, i));
54  GECODE_ME_FAIL(_x.cardMax(home, j));
55  }
56 
57  void
58  cardinality(Home home, const SetVarArgs& x, unsigned int i, unsigned int j) {
59  Set::Limits::check(i, "Set::cardinality");
60  Set::Limits::check(j, "Set::cardinality");
62  for (int k=x.size(); k--; ) {
63  Set::SetView _x(x[k]);
64  GECODE_ME_FAIL(_x.cardMin(home, i));
65  GECODE_ME_FAIL(_x.cardMax(home, j));
66  }
67  }
68 
69  void
73  }
74 
75  void
77  IntVar y(home, 0, static_cast<int>(Set::Limits::card));
78  rel(home, x, IRT_EQ, y, r);
79  cardinality(home, s, y);
80  }
81 
82 }
83 
84 // STATISTICS: set-post
unsigned int cardMax(void) const
Return maximum cardinality.
Definition: set.hpp:90
void check(int n, const char *l)
Check whether integer n is in range, otherwise throw overflow exception with information l...
Definition: limits.hpp:41
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1669
unsigned int cardMin(void) const
Return minimum cardinality.
Definition: set.hpp:86
const unsigned int card
Maximum cardinality of an integer set.
Definition: set.hh:105
Gecode::IntArgs i(4, 1, 2, 3, 4)
Equality ( )
Definition: int.hh:907
Reification specification.
Definition: int.hh:857
LinIntExpr cardinality(const SetExpr &e)
Cardinality of set expression.
Definition: set-expr.cpp:818
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition: set.hh:784
Set view for set variables
Definition: view.hpp:60
Passing set variables.
Definition: set.hh:492
Post propagator for SetVar SetOpType SetVar y
Definition: set.hh:784
Set variables
Definition: set.hh:131
Integer variables.
Definition: int.hh:353
void rel(Home home, FloatVar x0, FloatRelType frt, FloatVal n)
Propagates .
Definition: rel.cpp:47
Post propagator for SetVar x
Definition: set.hh:784
#define GECODE_ME_FAIL(me)
Check whether modification event me is failed, and fail space home.
Definition: macros.hpp:81
Gecode toplevel namespace
#define GECODE_POST
Check for failure in a constraint post function.
Definition: macros.hpp:44
Home class for posting propagators
Definition: core.hpp:922
#define GECODE_ES_FAIL(es)
Check whether execution status es is failed, and fail space home.
Definition: macros.hpp:107
Propagator for cardinality
Definition: int.hh:233