`sig
type 'a t = 'a Stack.t
exception Empty
val create : unit -> 'a t
val push : 'a -> 'a t -> unit
val pop : 'a t -> 'a
val top : 'a t -> 'a
val clear : 'a t -> unit
val copy : 'a t -> 'a t
val is_empty : 'a t -> bool
val length : 'a t -> int
val iter : ('a -> unit) -> 'a t -> unit
type 'a enumerable = 'a t
val enum : 'a t -> 'a BatEnum.t
val enum_destruct : 'a t -> 'a BatEnum.t
val of_enum : 'a BatEnum.t -> 'a t
val print :
?first:string ->
?last:string ->
?sep:string ->
('a BatInnerIO.output -> 'b -> unit) ->
'a BatInnerIO.output -> 'b t -> unit
val compare : 'a BatOrd.comp -> 'a t BatOrd.comp
val equal : 'a BatOrd.eq -> 'a t BatOrd.eq
module Exceptionless :
sig val top : 'a t -> 'a option val pop : 'a t -> 'a option end
end`