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  3. February 2004

Re: ITER, LEAVE, GOTO - dirty opcodes? was ->RE: NOTO (or "no GOT O i n FreeForm RPG")


On Tuesday, February 17, 2004, at 09:54 AM, Bartell, Aaron L. (TC) wrote:

Just curious, what would you do differently with the following code? Notice
how I have a DO loop (without conditions) wrapping this entire section of
code. If an error is encountered I call the $Error subroutine and ITER my
way out of the loop to avoid more errors. This goes back to my second email
where I said I should have had more ITERs within my loop.

That's like asking for directions to Portrush. If I were going to Portrush I wouldn't start from here at all.

First, DO on its own just DOes once so there is little point in it. Second, ITER branches to the loop condition; what you really want to do is leave the loop so LEAVE would be more appropriate than ITER. ITER works in this case **ONLY** because your loop executes only once. I think that is an appalling use of a loop construct because you don't want to loop at all. See Paul Tuohy's append for an example of what you should have coded. Even without SELECT you can do this with IF and ELSE conditions. There is no need for DO and ITER.

Now come up with a proper looping example which you think requires LEAVE and ITER.

Regards,
Simon Coulter.
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