RE: Eval Exception Error Trapping

The E operation extender should be supplanted with a keyword on the header
spec. That is something like:

  H     ERROR(*IO | *ALLWAYS | *NONIO)

Then we would not have to code that big-ass "E" for everything to check the
%ERROR or %STATUS.


Bob Cozzi

http://www.RPGIV.com




> -----Original Message-----
> From: owner-rpg400-l@midrange.com [mailto:owner-rpg400-l@midrange.com]On
> Behalf Of boldt@ca.ibm.com
> Sent: Friday, July 23, 1999 11:45 AM
> To: RPG400-L@midrange.com
> Subject: Re: Eval Exception Error Trapping
>
>
>
>
> Jon wrote:
> >Hans - I like the try/catch type approach in some ways but it is
> overkill in
> >many ways. Why not simply permit the coding of the "E" extender
> on numeric
> >operations? That way I can trap at the statement level if I wish.
>
> On the other hand, the E extender, as currently designed, already
> has serious limitations.  For example, coding E on a WRITE will
> trap file exceptions, but not program exceptions.  But on other
> opcodes, it does trap program exceptions.
>
> Perhaps it is overkill, but when writing new apps, it's the only
> exception handling method you need to know about.  Today, you need
> to know about INFSR's, *PSSR's, error indicators, extender E, etc.
> MONITOR is one easy-to-understand technique that can replace all
> others.
>
> Cheers!  Hans
>
> Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com
>
>
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