(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012     *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

(** Dynamics. Use with extreme care. Not for kids. *)

type t

val create : string -> ('a -> t) * (t -> 'a)
val tag : t -> string
val has_tag : t -> string -> bool
val pointer_equal : t -> t -> bool
