RE: What's the difference?

["Bob Cozzi" <cozzi@xxxxxxxxx>]

Barbara,
I realize that, but I was thinking in the context that few use
prototyped calls to call programs....
Thanks! :)
Bob
-----Original Message-----
From: rpg400-l-admin@midrange.com [mailto:rpg400-l-admin@midrange.com]
On Behalf Of Barbara Morris
Sent: Monday, November 18, 2002 3:43 PM
To: rpg400-l@midrange.com
Subject: Re: What's the difference?

Bob Cozzi wrote:
>
> Programs, on the other hand, work a little differently. When a program
> calls another program and passes parameters, the parameters are not
> checked to see if they match what is required by the called program.

This is related to the calling programs or procedures with CALL or CALLB
and PARM opcodes, not to calling programs.

> As the called program runs, if it "touches" any of the parameters then
> the check is performed. Now "touching" a parameter can take on many
> forms. But if you use a simply *ENTRY/PLIST without mapping the parms
> into a data structure, then you can also use %PARMS to check for
> un-specified parameters and simply avoid touching them. This allows
you
> to call a program with 10 parameters defined and only pass 3.  Just
> don't touch parms 4 through 10 and you can get away with anything.

This part is true for all calls, prototyped or CALL + PARM.


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