Module Var.Set

type elt = t
and t
val empty : t
val is_empty : t -> bool
val mem : t -> elt -> bool
val add : t -> elt -> t
val singleton : elt -> t
val remove : t -> elt -> t
val union : t -> t -> t
val inter : t -> t -> t
val diff : t -> t -> t
val compare : t -> t -> Ordering.t
val equal : t -> t -> bool
val is_subset : t -> of_:t -> bool
val iter : t -> f:(elt -> unit) -> unit
val map : t -> f:(elt -> elt) -> t
val fold : t -> init:'a -> f:(elt -> 'a -> 'a) -> 'a
val for_all : t -> f:(elt -> bool) -> bool
val exists : t -> f:(elt -> bool) -> bool
val filter : t -> f:(elt -> bool) -> t
val partition : t -> f:(elt -> bool) -> t * t
val cardinal : t -> int
val min_elt : t -> elt option
val max_elt : t -> elt option
val choose : t -> elt option
val split : t -> elt -> t * bool * t
val of_list : elt list -> t
val to_list : t -> elt list