(* Copyright (C) 2004, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * HELM 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://helm.cs.unibo.it/
 *)

let default_mode = `Term

let mode = ref default_mode

let _ =
  try
    match Sys.argv.(1) with
    | "alias" -> mode := `Alias
    | "term" -> mode := `Term
    | "tactic" -> mode := `Tactic
    | "tactical" -> mode := `Tactical
    | _ ->
        prerr_endline "What???????";
        exit 1
  with Invalid_argument _ -> ()

let _ =
  let ic = stdin in
  try
    while true do
      try
        let line = input_line ic in
        let istream = Stream.of_string line in
        (match !mode with
        | `Term ->
            let term = CicTextualParser2.parse_term istream in
            print_endline (BoxPp.pp_term term)
        | `Tactic ->
            let term = CicTextualParser2.parse_tactic istream in
            print_endline (TacticAstPp.pp_tactic term)
        | `Tactical ->
            let term = CicTextualParser2.parse_tactical istream in
            print_endline (TacticAstPp.pp_tactical term)
        | `Alias ->
            let env = CicTextualParser2.EnvironmentP3.of_string line in
            print_endline (CicTextualParser2.EnvironmentP3.to_string env));
        flush stdout
      with
      | CicTextualParser2.Parse_error msg -> prerr_endline msg
(*
      | Stdpp.Exc_located ((p_start, p_end), exn) ->
        prerr_endline (Printf.sprintf "Exception at character %d-%d: %s"
          p_start p_end (Printexc.to_string exn))
*)
    done
  with End_of_file ->
    close_in ic