type positions
type t
val create : ?initial_pos:pos ‑> unit ‑> t
add, add_twice and add_newline must be called with strictly increasing offset values.
add
add_twice
add_newline
offset
val add : t ‑> offset:int ‑> unit
int is absolute offset of the position
val add_twice : t ‑> offset:int ‑> unit
val add_newline : t ‑> offset:int ‑> unit
int is absolute offset of the newline character
val contents : t ‑> positions
val reset : t ‑> pos ‑> unit