Re: gnubol: Hacks needed to parse COBOL

["J & C Migrations, Pty." <migrate@tiac.net>]

Tim,
You have me confused now.  If there are problems with the definition of
*M*, than the program is non-conforming, and so long as you issue an error
message that flags *M* as invalid, your compiler has done its bit.

As I recall, my point was that you don't need "infinite look-ahead" for the
reduction of the PERFORM, because in the context of PERFORM *M* *n* TIMES,
*M* is reduced to a symbol-reference form, that is not a literal and not a
reserved word.   If *M* is valid, than either it is not yet tabulated, or
it is tabulated as a Procedure which is either not yet defined (only
previously referenced) or already defined.  It cannot be confused with *n*
because *n* is either a literal or a guaranteed-to-be-defined data-name.

At 07:54 AM 12/4/99 +1000, you wrote:
>It could also be multiply defined, with multiple references to come. Or it
could
>be deifned as a data name but also to be defined in an upcoming procedure
name. Or
>it could just not be defined at all. At least you would need to revisit it
>afterwards and make sure your assumption is correct.
>
>Tim Josling
>
>"J & C Migrations, Pty." wrote:
>
>> Since *M* is not
>> a reserved word, it must be a reference to either a known procedure, or one
>> yet to be defined.
>>
>> Regards,
>> Jonathan
>
>
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