RE: gnubol: How do we parse this language, anyway?

["William M. Klein" <wmklein@ix.netcom.com>]

I don't think the surprise is nearly as noteworthy (concerning the 2-level
deep conditionals followed by a period).  What is significant is that BOTH
the "old" and the "new" IBM compilers give errors for this situation - so I
still see no need to keep this open as a "possible COMPATIBILITY" extension.

Bill Klein
  wmklein <at> ix.netcom.com

> -----Original Message-----
> From: owner-gnu-cobol@wallace.lusars.net
> [mailto:owner-gnu-cobol@wallace.lusars.net]On Behalf Of
> RKRayhawk@aol.com
> Sent: Thursday, December 09, 1999 12:38 AM
> To: gnu-cobol@lusars.net
> Subject: Re: gnubol: How do we parse this language, anyway?
>
>
> In a message dated 12/8/99 10:12:34 AM EST,
> Davyd Ondrejko ,david.ondrejko@safelite.com writes:
>
> <<  Nested IF statements are no problem (although
>  I'm not sure how deep the nesting can go; at least 36, since that's
>  where I stopped trying >>
>
> Thanks for the generous effort. The clarity of the specific tests is great.
>
>
> Davyd also writes:
>
> <<
>
> > Or more dramatically
> >
> >    READ ....
> >        AT END
> >           ADD 1 to crazy-eof-counter
> >              ON SIZE ERROR
> >                 DISPLAY 'we must have been here a large number of times'
> > .
>
> This generates ... error ...
> >>
> (I did a lot of snipping here).
>
> That is a fascinating baseline, because in the new world of NOT
> conditionals
> you really would
> expect a two level encoding, such as the following (emphasis the NOT)
>
>     READ ....
>         ....
>         NOT AT END
>            ADD 1 to normal-ole-record-counter
>               ON SIZE ERROR
>                  DISPLAY 'data field design did not expect so many records'
>  * note EOS implicit scope terminator follows
>    .
>  *
>
> This is the kind of thing I mean in the discussion of the COBOL
> '85 compilers
> when I say two
> deep on different families of conditionals seem down right ordinary. Your
> genuine surprise when the older compiler presented you with an
> error message
> is certainly noteworthy.
>
> Thanks Again!
>
> Bob Rayhawk
>
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