(* plugin9.mod test for compiletime detection of overflow.

Copyright (C) 2001-2019 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 COPYING.  If not,
see <https://www.gnu.org/licenses/>.  *)

IMPLEMENTATION MODULE plugin9 ;  (*!m2pim+gm2*)


PROCEDURE bill (value: CARDINAL) ;
BEGIN
   value := value-1
END bill ;


PROCEDURE fred (value: CARDINAL) ;
BEGIN
   bill (value) ;
   IF value > 0
   THEN

   END
END fred ;


PROCEDURE bar ;
BEGIN
   fred (0)
END bar ;


PROCEDURE foo ;
BEGIN
   bar
END foo ;


END plugin9.