more parser conflicts?

[Iavor Diatchki]

Indeed!  Even documented, this seems like way too many reduce/reduce
conflicts---we should be able to refactor the grammar to avoid them.

On Wed Dec 03 2014 at 3:59:48 AM Simon Marlow <marlowsd at gmail.com> wrote:

> reduce/reduce conflicts are bad, especially so since they're
> undocumented.  We don't know whether this introduced parser bugs or not.
>   Mike - could you look at this please?  It was your commit that
> introduced the new conflicts.
>
> Cheers,
> Simon
>
> On 02/12/2014 10:19, Dr. ERDI Gergo wrote:
> > On Mon, 1 Dec 2014, Richard Eisenberg wrote:
> >
> >> In unrelated work, I saw this scroll across when happy'ing the parser:
> >>
> >>> shift/reduce conflicts:  60
> >>> reduce/reduce conflicts: 16
> >>
> >> These numbers seem quite a bit higher than what I last remember (which
> >> is something like 48 and 1, not 60 and 16). Does anyone know why?
> >
> > The offending commit is bc2289e13d9586be087bd8136943dc35a0130c88. I know
> > this because I was changing the parser for patsyn signatures, and so I
> > updated the numbers in Parser.y to make sure I'm not adding any new
> > conflicts:
> >
> > 25 June 2014
> >
> > Conflicts: 47 shift/reduce
> >             1 reduce/reduce
> >
> >
> > but then when time came to rebase my changes before pushing, I noticed
> > that it has gone up, and I had to update it yet again in Parser.y:
> >
> > 20 Nov 2014
> >
> > Conflicts: 60 shift/reduce
> >             12 reduce/reduce
> >
> > So anyway, the point is, if you try bc2289e and bc2289e^ you can see
> > that that is the commit that introduced these new conflicts.
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