On 09/11/2009 4:20 PM, Yihui Xie wrote:
Hi all,
It is recommended in ?'if' that we use 'else' right after '}' instead
of starting a new line, but I noticed deparse() will separate '}' and
'else' when the 'if...else' clause is used inside {...} (e.g. function
body). Here is an example:
## if/else inside {}
cat(deparse(parse(text='function(){if (TRUE) {1} else {2}}')), sep='\n')
structure(expression(function() {
if (TRUE) {
1
}
else {
2
}
}), srcfile = <environment>)
## no {}
cat(deparse(parse(text='if (TRUE) {1} else {2}')), sep='\n')
structure(expression(if (TRUE) {
1
} else {
2
}), srcfile = <environment>)
I wonder if there is a way to let 'else' stay with '}' when deparsing
the expression. Thanks!
No, there isn't. You're welcome to submit a well-tested patch, but
please accompany it with a stronger argument in its favour. Just
because humans are advised to type their code one way doesn't mean R
should, as long as it parses correctly.
Duncan Murdoch
sessionInfo()
R version 2.10.0 (2009-10-26)
i386-pc-mingw32
locale:
[1] LC_COLLATE=Chinese_People's Republic of China.936
[2] LC_CTYPE=Chinese_People's Republic of China.936
[3] LC_MONETARY=Chinese_People's Republic of China.936
[4] LC_NUMERIC=C
[5] LC_TIME=Chinese_People's Republic of China.936
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] animation_1.0-8 MASS_7.3-3
loaded via a namespace (and not attached):
[1] tools_2.10.0
Regards,
Yihui
--
Yihui Xie <xieyi...@gmail.com>
Phone: 515-294-6609 Web: http://yihui.name
Department of Statistics, Iowa State University
3211 Snedecor Hall, Ames, IA
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and provide commented, minimal, self-contained, reproducible code.
