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Propagator for channelling between variable-value-dual models More...

#include <channel.hh>

Public Member Functions

virtual Actorcopy (Space &home)
 Copy propagator during cloning.
 
virtual PropCost cost (const Space &home, const ModEventDelta &med) const
 Cost function (defined as PC_QUADRATIC_LO)
 
virtual void reschedule (Space &home)
 Schedule function.
 
virtual size_t dispose (Space &home)
 Delete propagator and return its size.
 
virtual ExecStatus propagate (Space &home, const ModEventDelta &med)
 Perform propagation.
 
- Public Member Functions inherited from Gecode::Propagator
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.
 
- Public Member Functions inherited from Gecode::Actor
virtual ~Actor (void)
 To avoid warnings.
 

Static Public Member Functions

static ExecStatus post (Home home, ViewArray< Gecode::Int::CachedView< Gecode::Int::IntView > > &x, ViewArray< CachedView< View > > &y)
 Post propagator for $x_i=j \Leftrightarrow i\in y_j$.
 
- Static Public Member Functions inherited from Gecode::Actor
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

 ChannelInt (Space &home, ChannelInt &p)
 Constructor for cloning p.
 
 ChannelInt (Home home, ViewArray< Gecode::Int::CachedView< Gecode::Int::IntView > > &, ViewArray< CachedView< View > > &)
 Constructor for posting.
 
- 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

ViewArray< Gecode::Int::CachedView< Gecode::Int::IntView > > xs
 IntViews, $x_i$ reflects which set contains element $i$.
 
ViewArray< CachedView< View > > ys
 SetViews that are constrained to be disjoint.
 

Detailed Description

template<class View>
class Gecode::Set::Channel::ChannelInt< View >

Propagator for channelling between variable-value-dual models

Implements channelling constraints between IntVars and SetVars. For IntVars $x_0,\dots,x_n$ and SetVars $y_0,\dots,y_m$ it propagates the constraint $x_i=j \Leftrightarrow i\in y_j$.

Can be used to implement the "channelling constraints" for disjoint with cardinalities from "Disjoint, Partition and Intersection Constraints for Set and Multiset Variables" Christian Bessiere, Emmanuel Hebrard, Brahim Hnich, Toby Walsh CP 2004

Requires

Definition at line 105 of file channel.hh.

Constructor & Destructor Documentation

◆ ChannelInt() [1/2]

template<class View >
Gecode::Set::Channel::ChannelInt< View >::ChannelInt ( Space & home,
ChannelInt< View > & p )
inlineprotected

Constructor for cloning p.

Definition at line 59 of file int.hpp.

◆ ChannelInt() [2/2]

template<class View >
Gecode::Set::Channel::ChannelInt< View >::ChannelInt ( Home home,
ViewArray< Gecode::Int::CachedView< Gecode::Int::IntView > > & xs0,
ViewArray< CachedView< View > > & ys0 )
inlineprotected

Constructor for posting.

Definition at line 44 of file int.hpp.

Member Function Documentation

◆ copy()

template<class View >
Actor * Gecode::Set::Channel::ChannelInt< View >::copy ( Space & home)
virtual

Copy propagator during cloning.

Implements Gecode::Actor.

Definition at line 115 of file int.hpp.

◆ cost()

template<class View >
PropCost Gecode::Set::Channel::ChannelInt< View >::cost ( const Space & home,
const ModEventDelta & med ) const
virtual

Cost function (defined as PC_QUADRATIC_LO)

Implements Gecode::Propagator.

Definition at line 93 of file int.hpp.

◆ reschedule()

template<class View >
void Gecode::Set::Channel::ChannelInt< View >::reschedule ( Space & home)
virtual

Schedule function.

Implements Gecode::Propagator.

Definition at line 99 of file int.hpp.

◆ dispose()

template<class View >
size_t Gecode::Set::Channel::ChannelInt< View >::dispose ( Space & home)
inlinevirtual

Delete propagator and return its size.

Reimplemented from Gecode::Actor.

Definition at line 106 of file int.hpp.

◆ propagate()

template<class View >
ExecStatus Gecode::Set::Channel::ChannelInt< View >::propagate ( Space & home,
const ModEventDelta & med )
virtual

Perform propagation.

Implements Gecode::Propagator.

Definition at line 121 of file int.hpp.

◆ post()

template<class View >
ExecStatus Gecode::Set::Channel::ChannelInt< View >::post ( Home home,
ViewArray< Gecode::Int::CachedView< Gecode::Int::IntView > > & x,
ViewArray< CachedView< View > > & y )
inlinestatic

Post propagator for $x_i=j \Leftrightarrow i\in y_j$.

Definition at line 67 of file int.hpp.

Member Data Documentation

◆ xs

IntViews, $x_i$ reflects which set contains element $i$.

Definition at line 108 of file channel.hh.

◆ ys

template<class View >
ViewArray<CachedView<View> > Gecode::Set::Channel::ChannelInt< View >::ys
protected

SetViews that are constrained to be disjoint.

Definition at line 110 of file channel.hh.


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