Re: Look for a LALR grammar for visual basic

Scott Stanchfield <thetick@scruz.net> wrote:


[snip]


>Unfornately, my NDA with them prevents me from saying much more about
>it... I think I can say that it was a fairly nasty beast in some areas:
>Think about
>
> IF x = 1 THEN
> END
> 100: END IF
>
>which would complicate a grammar significantly (yes, VB allows a label
>on things like "END IF" -- yuck!


          If you're going to allow goto, it makes sense to me to allow a
branch to the end of a block (from within the block only I hope).
Consider the equivalent in C:
                                        if (x==1)
                                              {
                                              exit(EXIT_SUCCESS);
                    target: }


          You could say that there is a null statement before the } and
that may be so. (I'm not up on the Standard sufficiently to be sure.)
In that case, it's so in the BASIC example, too.


[snip]


Sincerely,


Gene Wirchenko
--

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