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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 *)
(************************************************************************)
(* $Id: stamps.ml 5920 2004-07-16 20:01:26Z herbelin $ *)
let new_stamp =
let stamp_ctr = ref 0 in
fun () -> incr stamp_ctr; !stamp_ctr
type 'a timestamped = { stamp : int; ed : 'a }
let ts_stamp st = st.stamp
let ts_mod f st = { stamp = new_stamp(); ed = f st.ed }
let ts_it st = st.ed
let ts_mk v = { stamp = new_stamp(); ed = v}
let ts_eq st1 st2 = st1.stamp = st2.stamp
type 'a idstamped = 'a timestamped
let ids_mod f st = { stamp = st.stamp; ed = f st.ed}
let ids_it = ts_it
let ids_mk = ts_mk
let ids_eq = ts_eq
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