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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(*i $Id: hashcons.mli,v 1.5.16.1 2004/07/16 19:30:30 herbelin Exp $ i*)
+
+(* Generic hash-consing. *)
+
+module type Comp =
+  sig
+    type t
+    type u
+    val hash_sub :  u -> t -> t
+    val equal : t -> t -> bool
+    val hash : t -> int
+  end
+
+module type S =
+  sig
+    type t
+    type u
+    val f : unit -> (u -> t -> t)
+  end
+
+module Make(X:Comp) : (S with type t = X.t and type u = X.u)
+
+val simple_hcons : (unit -> 'u -> 't -> 't) -> ('u -> 't -> 't)
+val recursive_hcons : (unit -> ('t -> 't) * 'u -> 't -> 't) -> ('u -> 't -> 't)
+val recursive_loop_hcons :
+    (unit -> ('t -> 't) * 'u -> 't -> 't) -> ('u -> 't -> 't)
+val recursive2_hcons :
+  (unit -> ('t1 -> 't1) * ('t2 -> 't2) * 'u1 -> 't1 -> 't1) ->
+    (unit -> ('t1 -> 't1) * ('t2 -> 't2) * 'u2 -> 't2 -> 't2) ->
+      'u1 -> 'u2 -> ('t1 -> 't1) * ('t2 -> 't2)
+
+(* Declaring and reinitializing global hash-consing functions *)
+
+val init : unit -> unit
+val register_hcons : ('u -> 't -> 't) -> ('u -> 't -> 't)
+
+module Hstring : (S with type t = string and type u = unit)
+module Hobj : (S with type t = Obj.t and type u = (Obj.t -> Obj.t) * unit)
+
+val string : string -> string
+val obj : Obj.t -> Obj.t
+
+val magic_hash : 'a -> 'a
+