sig
type key
and 'a t
val create : ?size:int -> unit -> 'a SkipList.S.t
val clear : 'a SkipList.S.t -> unit
val size : 'a SkipList.S.t -> int
val add : 'a SkipList.S.t -> key:SkipList.S.key -> data:'a -> unit
val find : 'a SkipList.S.t -> SkipList.S.key -> 'a
val remove : 'a SkipList.S.t -> SkipList.S.key -> unit
val mem : 'a SkipList.S.t -> SkipList.S.key -> bool
val iter : 'a SkipList.S.t -> f:(SkipList.S.key -> 'a -> unit) -> unit
val fold :
'a SkipList.S.t -> f:(SkipList.S.key -> 'a -> 'b -> 'b) -> init:'b -> 'b
end