Thank you Duncan.
I confirm:
R version 3.1.0 Patched (2014-06-11 r65921) -- "Spring Dance"
> getParseData(parse(text = "{1}", keep.source = TRUE))
line1 col1 line2 col2 id parent token terminal text
7 1 1 1 3 7 0 expr FALSE
1 1 1 1 1 1 7 '{' TRUE {
2 1 2 1 2 2 3 NUM_CONST TRUE 1
3 1 2 1 2 3 7 expr FALSE
4 1 3 1 3 4 7 '}' TRUE }
Karl
On Thu, Jun 12, 2014 at 2:39 PM, Duncan Murdoch <murdoch.dun...@gmail.com>
wrote:
> On 12/06/2014, 7:37 AM, Karl Forner wrote:
> > Hi,
> >
> > With R-3.1.0 I get:
> >> getParseData(parse(text = "{1}", keep.source = TRUE))
> > line1 col1 line2 col2 id parent token terminal text
> > 7 1 1 1 3 7 9 expr FALSE
> > 1 1 1 1 1 1 7 '{' TRUE {
> > 2 1 2 1 2 2 3 NUM_CONST TRUE 1
> > 3 1 2 1 2 3 5 expr FALSE
> > 4 1 3 1 3 4 7 '}' TRUE }
> >
> > Which has two problems:
> > 1) the parent of the first expression (id=7) should be 0
> > 2) the parent of the expression with id=3 should be 7
>
> I believe this has been fixed in R-patched. Could you please check?
>
> The problem was due to an overly aggressive optimization introduced in
> R-devel in June, 2013. It assumed a vector was initialized to zeros,
> but in some fairly common circumstances it wasn't, so the parent
> calculation was wrong.
>
> Luckily 3.1.1 has been delayed by incompatible schedules of various
> people, or this fix might have missed that too. As with some other
> fixes in R-patched, this is a case of a bug that sat there for most of a
> year before being reported. Please people, test pre-release versions.
>
> Duncan Murdoch
>
>
> >
> > For reference, with R-3.0.2:
> >
> >> getParseData(parse(text = "{1}", keep.source = TRUE))
> > line1 col1 line2 col2 id parent token terminal text
> > 7 1 1 1 3 7 0 expr FALSE
> > 1 1 1 1 1 1 7 '{' TRUE {
> > 2 1 2 1 2 2 3 NUM_CONST TRUE 1
> > 3 1 2 1 2 3 7 expr FALSE
> > 4 1 3 1 3 4 7 '}' TRUE }
> >
> > which is correct.
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-devel@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
> >
>
>
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