[9fans] all you yacc experts

[iru.muzgo@gmail.com (Iruatã Souza)]

On Fri, Nov 11, 2011 at 6:54 PM, Bakul Shah <bakul at bitblocks.com> wrote:
> On Fri, 11 Nov 2011 08:07:21 PST ron minnich <rminnich at gmail.com> ?wrote:
>> If somebody wants to look at enhancing yacc so that the extra bison
>> bits can be supported, that would probably do the trick. I have no
>> idea of the level of effort, I have not looked.
>
> After some googling I see that src/cmd/gc/bisonerrors was
> added by Russ in an evening to improve go error messages.
>
> Clinton Jeffery in his "Generating LR syntax error messages
> from examples" paper (http://www.cs.nmsu.edu/~jeffery/merr.pdf
> -- not sure if this is the same paper as the one in TOPLAS)
> says his Merr program works with Berkeley yacc, AT&T yacc &
> bison. ?He also refers to a modified byacc called iyacc.
>
> Might it be worth looking Merr or iyacc? ?Porting bison to
> plan9 seems like a hugh punishment for a quick hack:-)
> Implementing Jeffery's directly in yacc might benefit other
> parsers as well.
>
>

Sorry if it obvious, but Russ posted about the improvement on Go
errors: http://research.swtch.com/2010/01/generating-good-syntax-errors.html.

iru