(* m2flex.def provides access to the C lexical implemenation m2.flex.

Copyright (C) 2001-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.

This file is part of GNU Modula-2.

GNU Modula-2 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 3, or (at your option)
any later version.

GNU Modula-2 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 GNU Modula-2; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  *)

DEFINITION MODULE m2flex ;

(*
    Title      : m2flex
    Author     : Gaius Mulley
    System     : UNIX (GNU Modula-2)
    Date       : Tue Jul 31 17:46:41 2001
    Last edit  : $Date: 2013/02/11 14:45:17 $
    Revision   : $Version$
    Description: provides a Modula-2 definition module for the C lexical
                 analysis flex file m2.flex
*)

FROM SYSTEM IMPORT ADDRESS ;
FROM m2linemap IMPORT location_t ;

EXPORT QUALIFIED GetToken, M2Error, OpenSource, CloseSource, GetLineNo,
                 GetColumnNo, GetLocation, GetTotalLines ;


(*
   CloseSource - provided for semantic sugar
*)

PROCEDURE CloseSource ;


(*
   OpenSource - returns TRUE if file, s, can be opened and
                all tokens are taken from this file.
*)

PROCEDURE OpenSource (s: ADDRESS) : BOOLEAN ;


(*
   GetToken - returns the ADDRESS of the next token and advances to
              the next token.
*)

PROCEDURE GetToken () : [ ADDRESS ] ;


(*
   GetLineNo - returns the current line number.
*)

PROCEDURE GetLineNo () : CARDINAL ;


(*
   GetColumnNo - returns the column where the current token starts.
*)

PROCEDURE GetColumnNo () : CARDINAL ;


(*
   GetLocation - returns the gcc location_t of the current token.
*)

PROCEDURE GetLocation () : location_t ;


(*
   M2Error - displays the error message, s, after the code line and pointer
             to the erroneous token.
*)

PROCEDURE M2Error (s: ADDRESS) ;


(*
   GetTotalLines - returns the total number of lines parsed.
*)

PROCEDURE GetTotalLines () : CARDINAL ;


END m2flex.