Module type Hashable.S

module type S = sig .. end

type t 

val hash : t -> int

val compare : t -> t -> int

val hashable : t Hashtbl.Hashable.t

module Table: Hashtbl.S  with type key   = t

module Hash_set: Hash_set.S  with type elt   = t

module Hash_queue: Hash_queue.S  with type Key.t = t