INTERFACE Err_impl;

(***************************************************************************)
(*                      Copyright (C) Olivetti 1989                        *)
(*                          All Rights reserved                            *)
(*                                                                         *)
(* Use and copy of this software and preparation of derivative works based *)
(* upon this software are permitted to any person, provided this same      *)
(* copyright notice and the following Olivetti warranty disclaimer are     *) 
(* included in any copy of the software or any modification thereof or     *)
(* derivative work therefrom made by any person.                           *)
(*                                                                         *)
(* This software is made available AS IS and Olivetti disclaims all        *)
(* warranties with respect to this software, whether expressed or implied  *)
(* under any law, including all implied warranties of merchantibility and  *)
(* fitness for any purpose. In no event shall Olivetti be liable for any   *)
(* damages whatsoever resulting from loss of use, data or profits or       *)
(* otherwise arising out of or in connection with the use or performance   *)
(* of this software.                                                       *)
(***************************************************************************)

IMPORT Text;
FROM Err IMPORT Severity;

TYPE
  PrintClosure = OBJECT
  METHODS
    print(severity: Severity; msg: Text.T) RAISES {};
  END;

PROCEDURE SetPrintClosure(p: PrintClosure): PrintClosure RAISES {};
(* 'p.print' will be called to output the message whenever 'Err.Print' is
called. The result is the previous value of the 'Err' print closure *)

END Err_impl.