sig
exception Empty
type 'a t
type 'a container = 'a t
val length : 'a container -> int
val is_empty : 'a container -> bool
val iter : 'a container -> f:('a -> unit) -> unit
val fold : 'a container -> init:'b -> f:('b -> 'a -> 'b) -> 'b
val exists : 'a container -> f:('a -> bool) -> bool
val for_all : 'a container -> f:('a -> bool) -> bool
val find : 'a container -> f:('a -> bool) -> 'a option
val to_list : 'a container -> 'a list
val to_array : 'a container -> 'a array
val invariant : 'a Core_queue.t -> unit
val create : unit -> 'a Core_queue.t
val enqueue : 'a Core_queue.t -> 'a -> unit
val dequeue : 'a Core_queue.t -> 'a option
val dequeue_exn : 'a Core_queue.t -> 'a
val peek : 'a Core_queue.t -> 'a option
val peek_exn : 'a Core_queue.t -> 'a
val clear : 'a Core_queue.t -> unit
val copy : 'a Core_queue.t -> 'a Core_queue.t
val transfer : src:'a Core_queue.t -> dst:'a Core_queue.t -> unit
val of_list : 'a list -> 'a Core_queue.t
end