Re: RPG still works even the input parameters are not match

Thanks Jon,
you are right, there is a logic to determine when to use the last two
parameters and it seems the CL with 3 parameter will not enter that logic.
A error MCH0801 will pop up if I use that last two parameters out of the
logic.

Gavin

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message: 1
date: Tue, 17 Apr 2012 13:04:39 -0400
from: Jon Paris <jon.paris@xxxxxxxxxxxxxx>
subject: Re: RPG still works even the input parameters are not match


On 2012-04-17, at 12:53 PM, rpg400-l-request@xxxxxxxxxxxx wrote:

I'm doing some RPG programs' development and I found that some of these

RPG

require more input parameters from their caller (e.g. a CL program), I

feel

confuse that they still working even the number of the parameters are not
match, for example, RPG A has 5 input parameter and its caller CL B only
gives it 3.

As long as no attempt is made to _access_ the unpassed parameters then it
will not cause a problem. I would guess that there is some logic in place
that ignores the last two parameters if a specific value occurs in one of
the first three.

Ideally the program should be testing (%Parms) the number of parameters
passed and issuing an error if more than the number passed are required.
However it is not at all uncommon for a sloppy programmer to just ignore
the possibility of such an error and rely instead on the
green-screen-of-death.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com