sig
type key = hashable
type 'a t
val create : int -> 'a t
val clear : 'a t -> unit
val copy : 'a t -> 'a t
val add : 'a t -> key:key -> data:'a -> unit
val remove : 'a t -> key -> unit
val find_all : 'a t -> key -> 'a list
val replace : 'a t -> key:key -> data:'a -> unit
val mem : 'a t -> key -> bool
val iter : f:(key:key -> data:'a -> unit) -> 'a t -> unit
val fold : f:(key:key -> data:'a -> 'b -> 'b) -> 'a t -> init:'b -> 'b
val length : 'a t -> int
val find_default : 'a t -> key -> default:(unit -> 'a) -> 'a
val find : 'a t -> key -> 'a option
val find_exn : 'a t -> key -> 'a
val iter_vals : f:('a -> unit) -> 'a t -> unit
val of_alist : (key * 'a) list -> 'a t
val to_alist : 'a t -> (key * 'a) list
val keys : 'a t -> key list
val data : 'a t -> 'a list
val sexp_of_t : ('a -> Sexplib.Sexp.t) -> 'a t -> Sexplib.Sexp.t
val t_of_sexp : (Sexplib.Sexp.t -> 'a) -> Sexplib.Sexp.t -> 'a t
module Infix :
sig
val ( |> ) : 'a t -> key -> 'a
val ( |?> ) : 'a t -> key -> 'a option
val ( <| ) : 'a t -> key * 'a -> unit
end
end