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(* Copyright (C) 2008 Free Software Foundation, Inc. *)
(* 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 2, 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 gm2; see the file COPYING. If not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *)
MODULE except7 ;
FROM libc IMPORT printf ;
FROM Storage IMPORT ALLOCATE, DEALLOCATE ;
FROM SYSTEM IMPORT ADR, WORD, THROW ;
PROCEDURE fly ;
BEGIN
printf("fly main body\n") ;
IF ip=NIL
THEN
THROW(1)
END ;
IF ip^=0
THEN
THROW(2)
END ;
IF 4 DIV ip^ = 4
THEN
printf("yes it worked\n")
ELSE
printf("no it failed\n")
END
END fly ;
(*
* a GNU M2 version of the Modula-2 example given in the ISO standard.
* This is a hand translation of the equivalent except.c file in this
* directory which is written to prove that the underlying runtime system
* will work with the GCC builtin longjmp/set interpretation.
*)
PROCEDURE tryFlying ;
BEGIN
printf("tryFlying main body\n");
fly ;
EXCEPT
printf("inside tryFlying exception routine\n") ;
IF (ip#NIL) AND (ip^=0)
THEN
printf("set value\n") ;
ip^ := 1 ;
RETRY
END
END tryFlying ;
PROCEDURE keepFlying ;
BEGIN
printf("keepFlying main body\n") ;
tryFlying ;
EXCEPT
printf("inside keepFlying exception routine\n") ;
IF ip=NIL
THEN
printf("allocate memory\n") ;
NEW(ip) ;
ip^ := 0 ;
RETRY
END
END keepFlying ;
VAR
ip: POINTER TO INTEGER ;
BEGIN
ip := NIL ;
keepFlying ;
printf("all done\n")
END except7.
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