type t = (int * int) * (bool * bool)

module Set : sig

    include Set.S with type elt = (int * int)

    val printb: UTF8.Buffer.buffer -> t -> unit

end

val to_pair: t -> (int * int) 

val from_string: bool * string -> bool * Num.num -> t

val to_hname: int -> UTF8.t

val to_string: t -> UTF8.t

val to_buffer: UTF8.Buffer.buffer -> t -> unit