Module type Collection.Set.S


module type S = sig .. end

type elt 
type t 
val is_empty : t -> bool
val mem : t -> elt -> bool
val cardinal : t -> int
val iter : (elt -> unit) -> t -> unit
val fold : (elt -> 'a -> 'a) -> t -> 'a -> 'a
val elements : t -> elt list
val equal : t -> t -> bool