| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | "McDevitt, Charles" <Charles(dot)McDevitt(at)emc(dot)com> |
| Cc: | Peter Eisentraut <peter_e(at)gmx(dot)net>, Robert Haas <robertmhaas(at)gmail(dot)com>, Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Kevin Grittner <kgrittn(at)mail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Parser Cruft in gram.y |
| Date: | 2012-12-20 23:16:42 |
| Message-ID: | 20121220231641.GB15871@awork2.anarazel.de |
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| Lists: | pgsql-hackers |
On 2012-12-20 23:12:55 +0000, McDevitt, Charles wrote:
> >
> > Another way of attack along these lines might be to use the %glr-parser
> > and then try to cut back on all those redundant rules that were put in
> > to avoid conflicts. The number of key words categories and such could
> > perhaps also be reduced that way.
> >
> > Of course, this is mostly speculation.
> >
> >
>
> The GLR output from Bison is licensed under the GPL (unlike the LALR output).
> So using Bison's GLR mode isn't an option.
Thats not the case anymore:
http://www.gnu.org/software/bison/manual/html_node/Conditions.html
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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