Stdlib.Weaktype !'a t = 'a Weak.tmodule type S = sig ... endmodule Make = Weak.Makeval create : int -> 'a tval length : 'a t -> intval set : 'a t -> int -> 'a option -> unitval get : 'a t -> int -> 'a optionval get_copy : 'a t -> int -> 'a optionval check : 'a t -> int -> boolval fill : 'a t -> int -> int -> 'a option -> unit