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seq.cpp
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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  * Last modified:
16  * $Date: 2010-03-03 17:32:21 +0100 (Wed, 03 Mar 2010) $ by $Author: schulte $
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43 
44 #include <gecode/set/sequence.hh>
45 
46 namespace Gecode { namespace Set { namespace Sequence {
47 
48  /*
49  * "Sequence" propagator
50  *
51  */
52 
53  Actor*
54  Seq::copy(Space& home, bool share) {
55  return new (home) Seq(home,share,*this);
56  }
57 
60  bool modified = false;
61  bool assigned;
62  do {
63  assigned = false; modified = false;
64  GECODE_ES_CHECK(propagateSeq(home, modified, assigned, x));
65  } while (assigned || modified);
66 
67  for (int i=x.size(); i--;)
68  if (!x[i].assigned())
69  return ES_FIX;
70 
71  return home.ES_SUBSUMED(*this);
72  }
73 
74 }}}
75 
76 // STATISTICS: set-prop
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:2973
virtual Actor * copy(Space &home, bool)
Copy propagator during cloning.
Definition: seq.cpp:54
ViewArray< SetView > x
Array of views.
Definition: propagator.hpp:146
Propagation has computed fixpoint.
Definition: core.hpp:528
Computation spaces.
Definition: core.hpp:1362
#define GECODE_ES_CHECK(es)
Check whether execution status es is failed or subsumed, and forward failure or subsumption.
Definition: macros.hpp:84
Gecode::IntArgs i(4, 1, 2, 3, 4)
Seq(Space &home, bool share, Seq &p)
Constructor for cloning p.
Definition: seq.hpp:56
ExecStatus
Definition: core.hpp:523
bool assigned(View x, int v)
Whether x is assigned to value v.
Definition: single.hpp:47
ExecStatus propagateSeq(Space &home, bool &modified, bool &assigned, ViewArray< SetView > &x)
Definition: common.hpp:47
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: seq.cpp:59
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1215
Gecode toplevel namespace
int ModEventDelta
Modification event deltas.
Definition: core.hpp:173