RE: MODS in subprocedures

Thank you.

-----Original Message-----
From: owner-rpg400-l@midrange.com [mailto:owner-rpg400-l@midrange.com]On
Behalf Of Jon.Paris@hal.it
Sent: Wednesday, May 09, 2001 5:16 PM
To: RPG400-L@midrange.com
Subject: RE: MODS in subprocedures


 >> I just kept my example simple which I shouldn't have done.  Sorry for
the confusion

No problem - normally I'm begging people to just keep it simple!

 >> What I am working on understanding now is the merits between passing
the pointer to the subprocedure versus returning the pointer to the calling
subprocedure.  For that matter, what are the merits of using a return
argument at all?

From my perspective a return value is preferable for two main reasons:
First when the result of the proc is usable directly in a calculation.  In
your case that is not likely.  The second reason is to make it obvious just
_what_ is being changed by the subproc.  Just safer that way - you know you
don't have to chase down the subproc logic just to see if it could have
changed one of the parms.

In your case I think I might go with Hans' suggestion in that having the
storage in the subproc doesn't permit you to invoke the routine twice.
That may not seem important now but one day .....

Even then I might still have it return the whole DS if it is not too huge.
Depends on my mood and the direction of the wind!



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