(* Copyright (C) 2000, 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://cs.unibo.it/helm/.
 *)

(*  AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
 *)

{ 
   open MQGTopParser
   
   let debug = false
   
   let out s = if debug then prerr_endline s
}

let SPC   = [' ' '\t' '\n']+
let ALPHA = ['A'-'Z' 'a'-'z' '_']
let NUM   = ['0'-'9']
let IDEN  = ALPHA (NUM | ALPHA)*
let QSTR  = [^ '"' '\\']+

rule comm_token = parse
   | "(*"         { comm_token lexbuf; comm_token lexbuf }
   | "*)"         { () }
   | ['*' '(']    { comm_token lexbuf }
   | [^ '*' '(']* { comm_token lexbuf }
and string_token = parse
   | '"'          { DQ  }
   | '\\' _       { STR (String.sub (Lexing.lexeme lexbuf) 1 1) }
   | QSTR         { STR (Lexing.lexeme lexbuf) }
   | eof          { EOF }
and spec_token = parse
   | "(*"         { comm_token lexbuf; spec_token lexbuf }
   | SPC          { spec_token lexbuf }
   | '"'          { let str = qstr string_token lexbuf in
                    out ("STR " ^ str); STR str }
   | '{'          { out "LC"; LC }
   | '}'          { out "RC"; RC }
   | ','          { out "CM"; CM }
   | '$'          { out "DL"; DL }
   | "mustobj"    { out "MOBJ"  ; MOBJ   }
   | "mustsort"   { out "MSORT" ; MSORT  }
   | "mustrel"    { out "MREL"  ; MREL   }
   | "onlyobj"    { out "OOBJ"  ; OOBJ   }
   | "onlysort"   { out "OSORT" ; OSORT  }
   | "onlyrel"    { out "OREL"  ; OREL   }
   | "universe"   { out "UNIV"  ; UNIV   } 
   | IDEN         { let id = Lexing.lexeme lexbuf in 
                    out ("ID " ^ id); ID id }
   | eof          { EOF }