Why not
if ( 0 ) {
commented with zero
} else {
commented with one
}
Greg Snow-2 wrote:
>
> I believe that #if lines for C++ programs is handled by the preprocessor,
> not the compiler. So if you want the same functionality for R programs,
> it would make sense to just preprocess the R file.
>
>> In C++, I can use the following construct to choice either of the two
>> blocks the comment but not both. Depending on whether the number after
>> "#if" is zero or not, the commented block can be chose. I'm wondering
>> if such thing is possible in R?
>>
>> #if 0
>> commented with 0
>> #else
>> commented with 1
>> #endif
>>
>> Regards,
>> Peng
>>
>
--
View this message in context:
http://www.nabble.com/Is-there-a-construct-for-conditional-comment--tp25034224p25064798.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
