Re: Look-ahead function

[Hans Boldt <boldt@xxxxxxxxxx>]

Mark wrote:
>At 08:45 AM 3/30/98 -0500, you wrote:
>>Hi Mark!  We haven't removed lookahead function - it's still there,
>>waiting to be used.  But the chances of it being enhanced to work
>>with externally described files are slim.
>
> Please?  Pretty please?  I was disappointed (even in RPG III) that it
>doesn't support externally described files.

Well, of course it could be done. We'd have to do a fair bit of work
to allow this, though.  For example, we'd have to bring in the field
definitions a second time, renaming them to avoid conflict.  But, as
I said, this one ain't gonna get a lot of support.

>
> Along the same lines, I wish limits files would support externally
>described files.  I know, OPNQRYF replaces it, but it's not the same.
>
>>BTW, over the years, we've dropped very few functions:  device CARD,
>>trailer records,  and opcodes FREE and DEBUG are the only ones I
>>can think of offhand.
>
> Why was the FREE opcode removed?  Why couldn't it have been expanded to
>allow factor 2 to specify *JOB, *CALLER, *ACTGRP?

FREE was removed because it just wouldn't work properly in ILE.  It's as
simple as that.  With a lot of work, some of the functionality could have
been implemented, but basically, it was deemed not worthwhile.

>
> Is there a replacement for the DEBUG opcode?  Is there a way to put an ILE
>pgm into debug mode without using the interactive debugger?

The replacement for the DEBUG opcode is the interactive debugger!

(BTW, even with a fancy interactive source debugger, I still sometimes use
the DSPLY opcode for debugging!.)

Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com
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