API for iterating over positions in an efficient way
type positions
= t
type t
val create : positions ‑> t
exception
No_more
Exception raised when the iterator has reached the end of the sequence.
val advance_exn : t ‑> skip:int ‑> pos
advance t ~skip skips the next skip positions in the sequence, advance to the next position and return it. Raises No_more when reaching the end of the position set.
advance t ~skip
skip