--- /dev/null
+(***********************************************************************)
+(* *)
+(* TAToo *)
+(* *)
+(* Kim Nguyen, LRI UMR8623 *)
+(* Université Paris-Sud & CNRS *)
+(* *)
+(* Copyright 2010-2012 Université Paris-Sud and Centre National de la *)
+(* Recherche Scientifique. All rights reserved. This file is *)
+(* distributed under the terms of the GNU Lesser General Public *)
+(* License, with the special exception on linking described in file *)
+(* ../LICENSE. *)
+(* *)
+(***********************************************************************)
+
+(*
+ Time-stamp: <Last modified on 2013-01-30 19:06:33 CET by Kim Nguyen>
+*)
+
+(** This modules implements unique identifiers represented by integers *)
+
+type t = private int
+(** The type of unique identifiers. *)
+
+exception Overflow
+(** Raised when the internal counters for IDs overflows. *)
+
+val make_maker : unit -> (unit -> t)
+(** Returns an uid generator.
+ [make_maker ()] returns a function that generates unique ids. Raises
+ [Overflow] if the internal counter overflows.
+*)
+
+val dummy : t
+(** A dummy identifier, guaranteed to be distinct from any value
+ returned by a generator.
+*)
+
+external to_int : t -> int = "%identity"
+(** Convert a unique id to an integer *)
+
+(**/**)
+
+external of_int : int -> t = "%identity"
+(** May break the invariant, use with caution *)