`sig
module type OrderedType =
sig
type t
val compare : Set.OrderedType.t -> Set.OrderedType.t -> int
end
module type S =
sig
type elt
type t
val empty : Set.S.t
val is_empty : Set.S.t -> bool
val mem : Set.S.elt -> Set.S.t -> bool
val add : Set.S.elt -> Set.S.t -> Set.S.t
val singleton : Set.S.elt -> Set.S.t
val remove : Set.S.elt -> Set.S.t -> Set.S.t
val union : Set.S.t -> Set.S.t -> Set.S.t
val inter : Set.S.t -> Set.S.t -> Set.S.t
val diff : Set.S.t -> Set.S.t -> Set.S.t
val compare : Set.S.t -> Set.S.t -> int
val equal : Set.S.t -> Set.S.t -> bool
val subset : Set.S.t -> Set.S.t -> bool
val iter : (Set.S.elt -> unit) -> Set.S.t -> unit
val map : (Set.S.elt -> Set.S.elt) -> Set.S.t -> Set.S.t
val fold : (Set.S.elt -> 'a -> 'a) -> Set.S.t -> 'a -> 'a
val for_all : (Set.S.elt -> bool) -> Set.S.t -> bool
val exists : (Set.S.elt -> bool) -> Set.S.t -> bool
val filter : (Set.S.elt -> bool) -> Set.S.t -> Set.S.t
val partition : (Set.S.elt -> bool) -> Set.S.t -> Set.S.t * Set.S.t
val cardinal : Set.S.t -> int
val elements : Set.S.t -> Set.S.elt list
val min_elt : Set.S.t -> Set.S.elt
val max_elt : Set.S.t -> Set.S.elt
val choose : Set.S.t -> Set.S.elt
val split : Set.S.elt -> Set.S.t -> Set.S.t * bool * Set.S.t
val find : Set.S.elt -> Set.S.t -> Set.S.elt
val of_list : Set.S.elt list -> Set.S.t
end
module Make :
functor (Ord : OrderedType) ->
sig
type elt = Ord.t
type t
val empty : t
val is_empty : t -> bool
val mem : elt -> t -> bool
val add : elt -> t -> t
val singleton : elt -> t
val remove : elt -> t -> t
val union : t -> t -> t
val inter : t -> t -> t
val diff : t -> t -> t
val compare : t -> t -> int
val equal : t -> t -> bool
val subset : t -> t -> bool
val iter : (elt -> unit) -> t -> unit
val map : (elt -> elt) -> t -> t
val fold : (elt -> 'a -> 'a) -> t -> 'a -> 'a
val for_all : (elt -> bool) -> t -> bool
val exists : (elt -> bool) -> t -> bool
val filter : (elt -> bool) -> t -> t
val partition : (elt -> bool) -> t -> t * t
val cardinal : t -> int
val elements : t -> elt list
val min_elt : t -> elt
val max_elt : t -> elt
val choose : t -> elt
val split : elt -> t -> t * bool * t
val find : elt -> t -> elt
val of_list : elt list -> t
end
end`