On 13-07-05 3:31 AM, Yihui Xie wrote:
Hi,
The text column for '->' becomes '<-' in the data frame returned by
getParseData():
getParseData(parse(text='1->x'))
line1 col1 line2 col2 id parent token terminal text
7 1 1 1 4 7 0 expr FALSE
1 1 1 1 1 1 2 NUM_CONST TRUE 1
2 1 1 1 1 2 7 expr FALSE
3 1 2 1 3 3 7 RIGHT_ASSIGN TRUE <-
4 1 4 1 4 4 6 SYMBOL TRUE x
6 1 4 1 4 6 7 expr FALSE
Is that expected?
It's by design, but I agree it's not ideal. The reason for it is that
"1 -> x" is parsed as `<-`(x, 1). I think the parser only does
translations like this for -> and ->>. Currently the parser shows the
name of the binary operator as the text.
I'll look into adding special handling for translations like this. We
will still parse the assignment in the same way, but the getParseData
text could be the true text.
Duncan Murdoch
sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=C LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
Regards,
Yihui
--
Yihui Xie <xieyi...@gmail.com>
Phone: 206-667-4385 Web: http://yihui.name
Fred Hutchinson Cancer Research Center, Seattle
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