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Re: help-bison Digest, Vol 30, Issue 15
From: |
Steve Murphy |
Subject: |
Re: help-bison Digest, Vol 30, Issue 15 |
Date: |
Sun, 23 Apr 2006 23:45:22 -0600 |
On Mon, 2006-04-24 at 01:31 -0400, Joel E. Denny wrote:
> On Sun, 23 Apr 2006, Steve Murphy wrote:
>
> > On Sun, 2006-04-23 at 10:02 -0600, Joel Denny wrote:
...
>
> > If the start symbol is going to be passed to yydestruct() come rain or
> > shine (if so specified in a %destructor), it might be meaningful to know
> > which it is... in other words, I haven't tried to understand the
> > algorithm, but firstly, can an error result in the start symbol being
> > tossed?
>
> Yes, after a valid sentence, there might be extra tokens.
>
> > If so, is there any way for yydestruct to determine whether the
> > start symbol is being tossed for Cleanup reasons, or for Error reasons?
> > (I think there could be situations where it might matter...).
>
> I know of no reliable way. Do you have an example where it's necessary to
> do this?
Heavens, no! Just a theoretical question. It could be, tho, that
sometime, somewhere, somehow, somebody's going to come up with one!
After all, my name **is** Murphy, and I'm just being optimistic! ;^)
>
> Joel