sig
type key
type 'a t
val create : int -> 'a Weakhtbl.S.t
val clear : 'a Weakhtbl.S.t -> unit
val copy : 'a Weakhtbl.S.t -> 'a Weakhtbl.S.t
val find : 'a Weakhtbl.S.t -> Weakhtbl.S.key -> 'a
val mem : 'a Weakhtbl.S.t -> Weakhtbl.S.key -> bool
val set : 'a Weakhtbl.S.t -> Weakhtbl.S.key -> 'a -> unit
val remove : 'a Weakhtbl.S.t -> Weakhtbl.S.key -> unit
val length : 'a Weakhtbl.S.t -> int
val memoize : int -> (Weakhtbl.S.key -> 'a) -> Weakhtbl.S.key -> 'a
val memoize_rec :
int ->
((Weakhtbl.S.key -> 'a) -> Weakhtbl.S.key -> 'a) -> Weakhtbl.S.key -> 'a
val memoize_option :
int -> (Weakhtbl.S.key option -> 'a) -> Weakhtbl.S.key option -> 'a
end