Re: ILE RPG:Is the use of ITER & LEAVE Structured Programming?

-----Original Message-----
From: frank.meaney@nellcorpb.com <frank.meaney@nellcorpb.com>
>
>     I was just looking at a printout from the News400.com website about
>     RPG ILE (tips and techniques). I belive the text was authored by
>     Bryan Meyers. However he mentioned the use of ITER and LEAVE in the
>     context of structured programming.
>
>     I suppose I am a purist and I ensure that these opcodes are not part
>     of any new development that we produce. IMHO these opcodes are GOTO's
>     without TAGs and are not structured programming. I'd love to hear
>     other opinions on this. And what is a strict defination of Structured
>     programming.

Most textbooks consider ITER and LEAVE (or whatever operations implement the
function in the language) to be structured operations.  There are occasions
where using them in a loop makes sense, i.e. makes the particular behaviour
required easier to implement and easier to maintain.  However, IMHO these
instances are few and far between in new code - there are very few cases
where using them is the best solution when all reasonable implementations
are considered.  Of course, when maintaining existing code, it's often
easier to add one of these in than it is to restructure a loop.

I don't have a hard and fast rule against using them here, however they are
on the "must be justified for each use" list.

Dave Shaw, General Nutrition, Greenville, SC (just down the road from BMW -
Bubba Makes Wheels :)
The opinions expressed may not be my employer's unless I'm sufficiently
persuasive...



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