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(* $Id$ *)
(* Sets using the generic comparison function of ocaml. Same interface as
the module [Set] from the ocaml standard library. *)
type 'a t
val empty : 'a t
val is_empty : 'a t -> bool
val mem : 'a -> 'a t -> bool
val add : 'a -> 'a t -> 'a t
val singleton : 'a -> 'a t
val remove : 'a -> 'a t -> 'a t
val union : 'a t -> 'a t -> 'a t
val inter : 'a t -> 'a t -> 'a t
val diff : 'a t -> 'a t -> 'a t
val compare : 'a t -> 'a t -> int
val equal : 'a t -> 'a t -> bool
val subset : 'a t -> 'a t -> bool
val iter : ('a -> unit) -> 'a t -> unit
val fold : ('a -> 'a -> 'a) -> 'a t -> 'a -> 'a
val cardinal : 'a t -> int
val elements : 'a t -> 'a list
val min_elt : 'a t -> 'a
val max_elt : 'a t -> 'a
val choose : 'a t -> 'a
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