ngl.cpp
Go to the documentation of this file.
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2013
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <gecode/set/branch.hh>
namespace Gecode { namespace Set { namespace Branch {
NGL*
IncNGL::copy(Space& home) {
return new (home) IncNGL(home,*this);
}
NGL::Status
IncNGL::status(const Space&) const {
// Is n in the glb(x)?
if (x.contains(n))
return NGL::SUBSUMED;
else
// Is n not in the lub(x)?
return x.notContains(n) ? NGL::FAILED : NGL::NONE;
}
ExecStatus
IncNGL::prune(Space& home) {
return me_failed(x.exclude(home,n)) ? ES_FAILED : ES_OK;
}
NGL*
ExcNGL::copy(Space& home) {
return new (home) ExcNGL(home,*this);
}
NGL::Status
ExcNGL::status(const Space&) const {
// Is n not in the lub(x)?
if (x.notContains(n))
return NGL::SUBSUMED;
else
// Is n in the lub(x)?
return x.contains(n) ? NGL::FAILED : NGL::NONE;
}
ExecStatus
ExcNGL::prune(Space& home) {
return me_failed(x.include(home,n)) ? ES_FAILED : ES_OK;
}
}}}
// STATISTICS: set-branch
Gecode::NGL
No-good literal recorded during search.
Definition core.hpp:1340
Gecode::NGL::Status
Status
The status of a no-good literal.
Definition core.hpp:1346
Gecode::NGL::SUBSUMED
@ SUBSUMED
The literal is subsumed.
Definition core.hpp:1348
Gecode::NGL::FAILED
@ FAILED
The literal is failed.
Definition core.hpp:1347
Gecode::NGL::NONE
@ NONE
The literal is neither failed nor subsumed.
Definition core.hpp:1349
Gecode::Set::Branch::ExcNGL::status
virtual NGL::Status status(const Space &home) const
Test the status of the no-good literal.
Definition ngl.cpp:62
Gecode::Set::Branch::ExcNGL::copy
virtual NGL * copy(Space &home)
Create copy.
Definition ngl.cpp:58
Gecode::Set::Branch::ExcNGL::ExcNGL
ExcNGL(Space &home, SetView x, int n)
Constructor for creation.
Definition ngl.hpp:44
Gecode::Set::Branch::ExcNGL::prune
virtual ExecStatus prune(Space &home)
Propagate the negation of the no-good literal.
Definition ngl.cpp:71
Gecode::Set::Branch::IncNGL::IncNGL
IncNGL(Space &home, SetView x, int n)
Constructor for creation.
Definition ngl.hpp:37
Gecode::Set::Branch::IncNGL::status
virtual NGL::Status status(const Space &home) const
Test the status of the no-good literal.
Definition ngl.cpp:43
Gecode::Set::Branch::IncNGL::copy
virtual NGL * copy(Space &home)
Create copy.
Definition ngl.cpp:39
Gecode::Set::Branch::IncNGL::prune
virtual ExecStatus prune(Space &home)
Propagate the negation of the no-good literal.
Definition ngl.cpp:52
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::ViewValNGL< SetView, int, PC_SET_ANY >::x
SetView x
Definition view-val.hpp:64
Gecode::ViewValNGL< SetView, int, PC_SET_ANY >::n
int n
Definition view-val.hpp:66
branch.hh
Gecode::me_failed
bool me_failed(ModEvent me)
Check whether modification event me is failed.
Definition modevent.hpp:54
Gecode::Set::Branch
Set branchings
Gecode::Set
Finite integer sets.
Definition var-imp.hpp:137
Gecode
Gecode toplevel namespace
Gecode::ExecStatus
ExecStatus
Definition core.hpp:472
Gecode::ES_OK
@ ES_OK
Execution is okay.
Definition core.hpp:476
Gecode::ES_FAILED
@ ES_FAILED
Execution has resulted in failure.
Definition core.hpp:474