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ngl.cpp
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33 
34 #include <gecode/set/branch.hh>
35 
36 namespace Gecode { namespace Set { namespace Branch {
37 
38  NGL*
40  return new (home) IncNGL(home,*this);
41  }
43  IncNGL::status(const Space&) const {
44  // Is n in the glb(x)?
45  if (x.contains(n))
46  return NGL::SUBSUMED;
47  else
48  // Is n not in the lub(x)?
49  return x.notContains(n) ? NGL::FAILED : NGL::NONE;
50  }
53  return me_failed(x.exclude(home,n)) ? ES_FAILED : ES_OK;
54  }
55 
56 
57  NGL*
59  return new (home) ExcNGL(home,*this);
60  }
62  ExcNGL::status(const Space&) const {
63  // Is n not in the lub(x)?
64  if (x.notContains(n))
65  return NGL::SUBSUMED;
66  else
67  // Is n in the lub(x)?
68  return x.contains(n) ? NGL::FAILED : NGL::NONE;
69  }
72  return me_failed(x.include(home,n)) ? ES_FAILED : ES_OK;
73  }
74 
75 }}}
76 
77 // STATISTICS: set-branch
bool notContains(int i) const
Test whether i is not in the least upper bound.
Definition: set.hpp:78
virtual NGL::Status status(const Space &home) const
Test the status of the no-good literal.
Definition: ngl.cpp:43
virtual NGL * copy(Space &home)
Create copy.
Definition: ngl.cpp:39
@ FAILED
The literal is failed.
Definition: core.hpp:1347
bool me_failed(ModEvent me)
Check whether modification event me is failed.
Definition: modevent.hpp:54
virtual NGL::Status status(const Space &home) const
Test the status of the no-good literal.
Definition: ngl.cpp:62
ExcNGL(Space &home, SetView x, int n)
Constructor for creation.
Definition: ngl.hpp:44
virtual ExecStatus prune(Space &home)
Propagate the negation of the no-good literal.
Definition: ngl.cpp:52
virtual NGL * copy(Space &home)
Create copy.
Definition: ngl.cpp:58
Computation spaces.
Definition: core.hpp:1742
Gecode toplevel namespace
IncNGL(Space &home, SetView x, int n)
Constructor for creation.
Definition: ngl.hpp:37
@ NONE
The literal is neither failed nor subsumed.
Definition: core.hpp:1349
int n
The stored value.
Definition: view-val.hpp:66
virtual ExecStatus prune(Space &home)
Propagate the negation of the no-good literal.
Definition: ngl.cpp:71
ModEvent exclude(Space &home, int i, int j)
Restrict least upper bound to not contain all elements between and including i and j.
Definition: set.hpp:156
SetView x
The stored view.
Definition: view-val.hpp:64
@ SUBSUMED
The literal is subsumed.
Definition: core.hpp:1348
bool contains(int i) const
Test whether i is in the greatest lower bound.
Definition: set.hpp:74
No-good literal recorded during search.
Definition: core.hpp:1340
Status
The status of a no-good literal.
Definition: core.hpp:1346
@ ES_FAILED
Execution has resulted in failure.
Definition: core.hpp:474
@ ES_OK
Execution is okay.
Definition: core.hpp:476
ModEvent include(Space &home, int i, int j)
Update greatest lower bound to include all elements between and including i and j.
Definition: set.hpp:126
ExecStatus
Definition: core.hpp:472