module type Queue = sig .. end
sig
end
type elt
val self : State.t
State.t
val add : elt -> unit
elt -> unit
val iter : (elt -> unit) -> unit
(elt -> unit) -> unit
val fold : ('a -> elt -> 'a) -> 'a -> 'a
('a -> elt -> 'a) -> 'a -> 'a
val is_empty : unit -> bool
unit -> bool
val length : unit -> int
unit -> int