Re: iSeries 25% Growth 3rd Quarter

On 10/19/05, vhamberg@xxxxxxxxxxx <vhamberg@xxxxxxxxxxx> wrote:
> I'm not sure this is what Steve means, but if you use a PLIST in RPG, there 
> is no data type checking. We know that. But if you prototype your RPGLE, then 
> data types ARE checked at the linking stage. As Elvis said, get into ILE, 
> make modules, prototype stuff in RPG, and you have mapping. In addition, as I 
> said, there are these operational descriptor thingies that are usable if you 
> choose to do so - one would have to do a search on that term to see how - 
> I've not done so yet.
>

Vern,

you are right about the opdesc. I was reading the F1 documentation of
the CALLPRC command today and it has specific statements as to what to
watch out for when calling a procedure using CALLPRC.  The variable is
passed as is, unmapped.  The programmer is supposed to use OPDESC to
know the actual length of the data that was passed.

-Steve

> -------------- Original message --------------
>
> > -----Original Message-----
> > From: midrange-l-bounces@xxxxxxxxxxxx
> > [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Steve Richter
> > Sent: Wednesday, October 19, 2005 8:25 AM
> > To: Midrange Systems Technical Discussion
> > Subject: Re: iSeries 25% Growth 3rd Quarter
> >
> >
> > of course. are you aware that it does not map the CL variable into
> > the argument of the called procedure? that is a bug waiting to
> > happen. You can make a strong case that CALLPRC should not be used
> > because of this. otherwise, someone in the organization comes along
> > after you, makes an innocent code change to the procedure being called
> > - the result being code that fails the next time the CLLE module is
> > run.
> >
> > -Steve
> >
> > What do you mean, "it does not map the CL variable into the argument or
> > the called procedure."?
> >
> > CALLPRC can pass a parameter by reference or by value....what else is
> > needed?
> >
> >
> >
> >
> > Charles Wilt
> > --
> > iSeries Systems Administrator / Developer
> > Mitsubishi Electric Automotive America
> > ph: 513-573-4343
> > fax: 513-398-1121
> >
> >
> > --
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