RE: Suggested Technique

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


*****************************
NOTICE:
All e-mail sent to or from this e-mail address will be received or otherwise 
recorded by
The Sharper Image corporate e-mail system and is subject to archival, 
monitoring,
and review by and/or disclosure to Sharper Image security and other management.
This message is intended only for the use of the addressee and may contain 
information
that is privileged and confidential.

The contents of this message may contain personal views which are not the views 
of The Sharper Image.
If you are not the intended recipient, dissemination of this communication is 
prohibited.
*****************************