
Lexical ordering propagator. More...
#include <rel.hh>
Public Member Functions | |
| virtual Actor * | copy (Space &home) |
| Copy propagator during cloning. | |
| virtual PropCost | cost (const Space &home, const ModEventDelta &med) const |
| Cost function (defined as low linear) | |
| virtual void | reschedule (Space &home) |
| Schedule function. | |
| virtual ExecStatus | propagate (Space &home, const ModEventDelta &med) |
| Perform propagation. | |
| virtual size_t | dispose (Space &home) |
| Delete propagator and return its size. | |
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< VX > &x, ViewArray< VY > &y, bool strict) |
| Post propagator for lexical order between x and y. | |
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 | |
| LexLqLe (Space &home, LexLqLe< VX, VY > &p) | |
| Constructor for cloning p. | |
| LexLqLe (Home home, ViewArray< VX > &x, ViewArray< VY > &y, bool strict) | |
| 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. | |
| Propagator * | fwd (void) const |
| Return forwarding pointer during copying. | |
| Kernel::GPI::Info & | gpi (void) |
| Provide access to global propagator information. | |
Protected Attributes | |
| ViewArray< VX > | x |
| View arrays. | |
| ViewArray< VY > | y |
| bool | strict |
| Determines whether propagator is strict or not. | |
Lexical ordering propagator.
The propagator uses the algorithm (and also the automaton) from: Mats Carlsson, Nicolas Beldiceanu, Revisiting the Lexicographic Ordering Constraint. SICS Technical Report T2002:17, SICS, Sweden, 2002.
It deviates in the following two main aspects:
Requires
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Cost function (defined as low linear)
Implements Gecode::Propagator.
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Delete propagator and return its size.
Reimplemented from Gecode::Actor.
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