Re: FYI: default %printer/%destructor

[Hans Aberg]

On 23 Nov 2006, at 09:47, Paul Eggert wrote:

> > Maybe it's just me, but I prefer Hans' suggestion:
> >
> >   exp/sum: exp/term1 '+' exp/term2
> >
> > over
> >
> >   exp#sum: exp#term1 '+' exp#term2
> >
> > I can't think of any semantic reason to prefer one over the  
> > other.  The
> > slash is just a little easier on my eyes.
>
> I think "/" bugs me because it means "or" in ABNF, which is the
> standard grammatical notation used in Internet RFCs; see
> <http://www.ietf.org/rfc/rfc4234>.

As for BNF extensions, I think Bison will have to get its own  
variation. These standards where cooked up with other objectives in  
mind.

> I could live with "/",
> I suppose.

I think "/" could be used in math, but one is there used to overload  
symbols. I thought at first "#" might look to heavy, but in the  
calculator example, it looks fine. And "#" is used in TeX i onccetion  
with variables.

> > I don't much like the `-' to mean nothing.  I had originally  
> > suggested `!'
> > instead, but I found a reason why I don't like it either, and that  
> > reason
> > also applies to `-'.  This one post might help you catch up:
> >
> >   http://lists.gnu.org/archive/html/bison-patches/2006-11/ 
> > msg00039.html
>
> Sorry, I don't follow the argument there.  How does it apply to "/"
> (or "#" or whatever)?

And when I tried to look, the server was down.

  Hans Aberg