Listset.Make
module E : Elt
type elt = E.t
type t = elt list
val equal : t -> t -> bool
val compare : t -> t -> int
val empty : t
val is_empty : t -> bool
val add : elt -> t -> t
val remove : elt -> t -> t
val mem : elt -> t -> bool
val iter : ( elt -> unit ) -> t -> unit
val fold : ( elt -> 'a -> 'a ) -> t -> 'a -> 'a
val filter : ( elt -> bool ) -> t -> t
val partition : ( elt -> bool ) -> t -> t * t
val union : t -> t -> t
val inter : t -> t -> t
val diff : t -> t -> t
val subset : t -> t -> bool
val intersect : t -> t -> bool
val factorize : t -> t -> t * t * t
Returns (left,common,right)
val big_union : t list -> t
val big_inter : t list -> t