RE: Suggested Technique

["Joel Fritz" <JFritz@xxxxxxxxxxxxxxxx>]

I should know better to get involved.  This is partly a matter of taste,
although in matters of style I'm always right.<g> Having been raised on
the single exit point theory, I find the code sample with the leaves
harder to read than the one without.  For cases like this I think I'd
use an indicator variable called "done" and set it in every exit
situation.  I'd probably use a character or numeric variable called
something like leave_mode to contain the reason for ending the loop.
This may just be a Pascal flashback, but my way, strangely enough, is
more readable to me.  <g>



Dow NOT done;

exfmt screen;
select;
   
    when F3;
      done = *on;
    when cond1;
       leave_mode = cond1stuff();
       done = *on;

    ...........

enddo;
//execute code that relies on leave_mode value

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Larry
Sent: Monday, January 31, 2005 2:31 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Suggested Technique

Hi Martin,

<snip>
While I understand the idea of DO *hival coupled with a leave, why not
just say it in the first place, and have a DOU F3 and avoid the extra
lines of coding? DOU F3 is pretty clear, too, isn't it?
</snip>

I agree. But in the scenario where there are three different reasons why
I would leave the screen loop, each also requiring a separate and
distinct action, then I would rather couple the "action" and the "leave"
to make it obvious to me.

Examples:

1)

DOU F3
        or someFlag
        or someOtherFlag
        or yetAnotherFlag

exfmt screen

select


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