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seq-u.hpp
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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
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39 
40 namespace Gecode { namespace Set { namespace Sequence {
41 
42  /*
43  * "Sequenced union" propagator
44  *
45  */
46 
49  : NaryOnePropagator<SetView,PC_SET_ANY>(home,x, y) {}
50 
55  }
56 
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
unsigned int cardMax(void) const
Return maximum cardinality.
Definition: set.hpp:86
ViewArray< SetView > x
Array of views.
Definition: pattern.hpp:175
#define forceinline
Definition: config.hpp:185
static ExecStatus post(Home home, ViewArray< SetView >, SetView)
Post propagator and .
Definition: seq-u.hpp:58
Computation spaces.
Definition: core.hpp:1701
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:232
Execution has resulted in failure.
Definition: core.hpp:473
(n+1)-ary propagator
Definition: pattern.hpp:172
void update(Space &home, BndSet &x)
Update this set to be a clone of set x.
Definition: integerset.hpp:140
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:52
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:56
Post propagator for SetVar SetOpType SetVar y
Definition: set.hh:767
ExecStatus
Definition: core.hpp:471
Post propagator for SetVar x
Definition: set.hh:767
Execution is okay.
Definition: core.hpp:475
SeqU(Space &home, SeqU &p)
Constructor for cloning p.
Definition: seq-u.hpp:52
Gecode toplevel namespace
bool shared(ViewArray< ViewX > x, ViewArray< ViewY > y)
Definition: array.hpp:1428
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1138
Propagator for the sequenced union constraint
Definition: sequence.hh:81
Home class for posting propagators
Definition: core.hpp:853
static ExecStatus post(Home home, View0 x, View1 y)
Post propagator .
Definition: eq.hpp:54