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

[Scott Johnson <sjohnson@xxxxxxxxxxxxx>]

Frank,

I am on your side.  ITER and LEAVE are not structured programming.
They are just GOTOs in disguise.  Rumor has it that IBM is working on
another one that will allow a person to leave an subroutine in the middle
of it. I ask why?  Couldn't their time be better spent elsewhere?  Wouldn't
this be the same as a GOTO and a TAG??

I view Structured Programming as one entry point/one exit point.
DO loops are entered at the top and you exit at the bottom.  Same
with Subroutines.  I just don't like that leaving something in the middle.
It can make debugging somebody else's code more difficult.

--  My Two Cents Worth
------------------------------------------------------
Scott P. Johnson
Programmer/Analyst
IBM Certified Specialist - AS/400 RPG Programmer
Highsmith Inc.
W5527 Hwy 106, PO BOX 800
Fort Atkinson, WI 53538-0800
TEL:  920-563-9571                FAX:  920-563-7395
sjohnson@highsmith.com
www.highsmith.com
------------------------------------------------------
----------
From:   frank.meaney@nellcorpb.com[SMTP:frank.meaney@nellcorpb.com]
Sent:   Thursday, April 23, 1998 3:06 PM
To:     MIDRANGE-L@midrange.com
Subject:        ILE RPG:Is the use of ITER & LEAVE Structured Programming?
     
     Hi Folks,
     
     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.
     
     Regards,
     
     Frank Meaney.
     (Unisoft Systems Ltd)     

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