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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
type 'a t
type ('a,'b) search = [ `Stop of 'b | `Cont of 'a ]
val create : unit -> 'a t
val push : 'a -> 'a t -> unit
val find : ('c -> 'a -> ('c, 'b) search) -> 'c -> 'a t -> 'b
val is_empty : 'a t -> bool
val iter : ('a -> unit) -> 'a t -> unit
val clear : 'a t -> unit
val length : 'a t -> int
(* may raise Stack.Empty *)
val pop : 'a t -> 'a
val top : 'a t -> 'a
(* Extra *)
val to_list : 'a t -> 'a list
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