DataStructures.IntSet

DataStructures.IntSet is a drop-in replacement for the Base IntSet type. It efficiently stores dense collections of small non-negative Ints as a sorted set. The constructor IntSet([itr]) constructs a sorted set of the integers generated by the given iterable object, or an empty set if no argument is given. If the set will be sparse (for example holding a few very large integers), use Set or SortedSet instead.

A complement IntSet may be constructed with complement or complement!. The complement of an empty IntSet contains typemax(Int) elements from 0 to typemax(Int)-1.