RE: Passing By Reference

A parameter passed by reference can be changed.
Can it be returned? It depends on what you mean.
As written I'm guessing you're doing this:

D myProc   PI             32A
D  inparm                 32A  OPTIONS(*VARSIZE)
C           Eval    inParm = 'ABCDEFG'
C           return  inParm

Is that what you're trying to do?
If you change inParm, then the value in the variable used when calling
MyProc is changed because it is the same storage you are changing, just
like *ENTRY/PLIST in a regular CALL to a program. There is no reason to
do a RETURN opcode.

Having said that, if you are using the above techinque, I'm not certain
if it is simply a compiler bug/error or not, but I'm sure Hans or
Barbara will be able to answer that question.

Bob Cozzi

-----Original Message-----
From: rpg400-l-admin@midrange.com [mailto:rpg400-l-admin@midrange.com]
On Behalf Of JJW
Sent: Monday, November 25, 2002 9:39 AM
To: rpg400-l@midrange.com
Subject: Passing By Reference


Hi *ALL

I pass a parameter with option(*varsize) to a subprocedure
of a service program by reference.  I modify the parameter
and upon trying to return the parameter to the calling
program I get a pointer not set error.  I can however move
the parameter to a field defined LIKE the parameter,
change the like field and pass that field back with no
problem.

Is it true that a parameter passed to a subprocedure by reference cannot
be changed and returned?

TIA!!!

John
_______________________________________________
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing
list To post a message email: RPG400-L@midrange.com To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/cgi-bin/listinfo/rpg400-l
or email: RPG400-L-request@midrange.com
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.