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?Set in_set_range ++Lwb..++Upb

Set is an integer set within the given bounds
A free variable, set variable, array reference, or an integer list
Structure holding two lists of integers


Lwb and Upb are two lists of integers. Lwb must be a sublist of Upb. Set is unified with a set variable whose lower bound is the set of list elements of Lwb, and whose upper bound is the set of list elements of Upb.

Fail Conditions

Lwb is not a sublist of Upb


(5) type error
Set is not a variable, array reference, or list, or Lwb..Upb is not a ../2 structure

See Also

intset / 3, intsets / 4