2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
17 let env = H.create hsize
20 (* Internal functions *******************************************************)
22 (* Interface functions ******************************************************)
24 let set_entry f entry =
25 let _, uri, b = entry in
26 let entry = !age, uri, b in
27 incr age; H.add env uri entry; f entry
29 let get_entry err f uri =
30 try f (H.find env uri) with Not_found -> err ()