
max_regret_lwb(?Var, ?Criterion)

   Generic search compatible variable selection method, returns the regret value for Var

Arguments
   Var                 Domain variable or integer
   Criterion           Variable

Type
   library(gfd)

Description

This predicate is designed to be used as a variable selection method
with generic search (lib(gfd_search)), and should be used with 
gfd_search's delete/5 and search/6. The effect is to select the first
variable with the maximum regret (the largest difference between the 
smallest and second smallest value in the domain).

Unlike the built-in generic search's max_regret method, where the regret
value is calculated in ECLiPSe from the variable's domain, this predicate 
obtain the regret value from Gecode.


See Also
   gfd_search : delete / 5, gfd_search : search / 6
