(***********************************************************************)
(*                                                                     *)
(*                          OCamlP3l                                   *)
(*                                                                     *)
(* (C) 2004-2007                                                       *)
(*             Roberto Di Cosmo (dicosmo@dicosmo.org)                  *)
(*             Zheng Li (zli@lip6.fr)                                  *)
(*             Pierre Weis (Pierre.Weis@inria.fr)                      *)
(*             Francois Clement (Francois.Clement@inria.fr)            *)
(*                                                                     *)
(* Based on original Ocaml P3L System                                  *)
(* (C) 1997 by                                                         *)
(*             Roberto Di Cosmo (dicosmo@ens.fr)                       *)
(*             Marco Danelutto (marcod@di.unipi.it)                    *)
(*             Xavier Leroy  (Xavier.Leroy@inria.fr)                   *)
(*             Susanna Pelagatti (susanna@di.unipi.it)                 *)
(*                                                                     *)
(* This program is free software; you can redistribute it and/or       *)
(* modify it under the terms of the GNU Library General Public License *)
(* as published by the Free Software Foundation; either version 2      *)
(* of the License, or (at your option) any later version.              *)
(*                                                                     *)
(* This program is distributed in the hope that it will be useful,     *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of      *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the       *)
(* GNU Library General Public License for more details.                *)
(*                                                                     *)
(***********************************************************************)

(* $Id: command_options.ml,v 1.3 2007-01-23 15:50:04 weis Exp $ *)

(* To add options to the command line in different modules way *)
let options = ref [];;

let all () = !options;;

let add (option_name:string) action (man:string) =
  options := (option_name, action, man) :: !options;;

(* A special case: flag options *)
let flag init option_name message =
  let r = ref init in
  add option_name
    (if init then Arg.Clear r else Arg.Set r)
    message;
  r;;

(* Another special case: debug options (init value is false). *)
let debug option_name message =
  let r = ref false in
  add option_name (Arg.Set r) message;
  (fun s -> if !r then prerr_endline s);;