[ library(fd) | Reference Manual | Alphabetic Index ]


If within a minimization, force a check of the cost variable against the cost bound, which may lead to earlier failure.


This predicate can be used within a goal that is being minimized using minimize/2 or any of its variants. If used in other contexts it has no effect just succeeds.

The behaviour of minimize/2 is such that the cost bound is tightened whenever a better solution is found, but this tightening does not trigger an automatic check. It can therefore be advantageous and lead to earlier failure when minimize_bound_check/0 is called after every labeling step.

Fail Conditions

Fails if the current cost cannot become smaller that the cost bound.




    labeling([X|Xs]) :-
	% do the check urgently, before any propagation happens
	call_priority((indomain(X), minimize_bound_check), 2),

See Also

minimize / 2, minimize / 4, minimize / 6, minimize / 8