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Domain consistent distinct propagator. More...

#include <distinct.hh>

Public Member Functions

virtual ExecStatus propagate (Space &home, const ModEventDelta &med)
 Perform propagation.
virtual PropCost cost (const Space &home, const ModEventDelta &med) const
 Cost function.
virtual Actorcopy (Space &home)
 Copy propagator during cloning.
Public Member Functions inherited from Gecode::NaryPropagator< View, PC_INT_DOM >
virtual void reschedule (Space &home)
 Schedule function.
virtual size_t dispose (Space &home)
 Delete propagator and return its size.
ModEventDelta modeventdelta (void) const
 Return the modification event delta.
virtual ExecStatus advise (Space &home, Advisor &a, const Delta &d)
 Advise function.
virtual void advise (Space &home, Advisor &a)
 Run advisor a to be run on failure in failed space.
double afc (void) const
 Return the accumlated failure count.
unsigned int id (void) const
 Return propagator id.
PropagatorGroup group (void) const
 Return group propagator belongs to.
void group (PropagatorGroup g)
 Add propagator to group g.
bool disabled (void) const
 Whether propagator is currently disabled.
virtual ~Actor (void)
 To avoid warnings.

Static Public Member Functions

static ExecStatus post (Home home, ViewArray< View > &x)
 Post propagator for views x.
static void * operator new (size_t s, Space &home)
 Allocate memory from space.
static void operator delete (void *p, Space &home)
 No-op for exceptions.
static void * operator new (size_t s)
 Not used.
static void operator delete (void *p)
 Not used.

Protected Member Functions

 Dom (Space &home, Dom< View > &p)
 Constructor for cloning p.
 Dom (Home home, ViewArray< View > &x)
 Constructor for posting.
Protected Member Functions inherited from Gecode::NaryPropagator< View, PC_INT_DOM >
 NaryPropagator (Space &home, NaryPropagator &p)
 Constructor for cloning p.
Protected Member Functions inherited from Gecode::Propagator
 Propagator (Home home)
 Constructor for posting.
 Propagator (Space &home, Propagator &p)
 Constructor for cloning p.
Propagatorfwd (void) const
 Return forwarding pointer during copying.
Kernel::GPI::Infogpi (void)
 Provide access to global propagator information.

Protected Attributes

DomCtrl< Viewdc
 Propagation controller.
Protected Attributes inherited from Gecode::NaryPropagator< View, PC_INT_DOM >
ViewArray< Viewx
 Array of views.

Detailed Description

template<class View>
class Gecode::Int::Distinct::Dom< View >

Domain consistent distinct propagator.

The propagator uses staging: first it uses naive value-based propagation and only then uses domain consistent propagation.

The algorithm is taken from: Jean-Charles Régin, A filtering algorithm for constraints of difference in CSPs, Proceedings of the Twelfth National Conference on Artificial Intelligence, pages 362–367. Seattle, WA, USA, 1994.

Requires

Definition at line 283 of file distinct.hh.

Constructor & Destructor Documentation

◆ Dom() [1/2]

template<class View>
Gecode::Int::Distinct::Dom< View >::Dom ( Space & home,
Dom< View > & p )
inlineprotected

Constructor for cloning p.

Definition at line 60 of file dom.hpp.

◆ Dom() [2/2]

template<class View>
Gecode::Int::Distinct::Dom< View >::Dom ( Home home,
ViewArray< View > & x )
inlineprotected

Constructor for posting.

Definition at line 40 of file dom.hpp.

Member Function Documentation

◆ propagate()

template<class View>
ExecStatus Gecode::Int::Distinct::Dom< View >::propagate ( Space & home,
const ModEventDelta & med )
virtual

Perform propagation.

Implements Gecode::Propagator.

Definition at line 96 of file dom.hpp.

◆ cost()

template<class View>
PropCost Gecode::Int::Distinct::Dom< View >::cost ( const Space & home,
const ModEventDelta & med ) const
virtual

Cost function.

If in stage for naive value propagation, the cost is low linear. Otherwise it is high quadratic.

Reimplemented from Gecode::NaryPropagator< View, PC_INT_DOM >.

Definition at line 65 of file dom.hpp.

◆ copy()

template<class View>
Actor * Gecode::Int::Distinct::Dom< View >::copy ( Space & home)
virtual

Copy propagator during cloning.

Implements Gecode::Actor.

Definition at line 74 of file dom.hpp.

◆ post()

template<class View>
ExecStatus Gecode::Int::Distinct::Dom< View >::post ( Home home,
ViewArray< View > & x )
static

Post propagator for views x.

Definition at line 45 of file dom.hpp.

Member Data Documentation

◆ dc

template<class View>
DomCtrl<View> Gecode::Int::Distinct::Dom< View >::dc
protected

Propagation controller.

Definition at line 287 of file distinct.hh.


The documentation for this class was generated from the following files: