[R] Block comment?

[William Dunlap]

Is the reason you want a block comment containing code (as opposed to
arbitrary text) that you want to be able to easily run the commented out
code?  If so the 'if()' construct has the advantage that you only need to
change code at the start of the comment, not at both ends.

The if(FALSE) could be if(isTRUE(getOption("DEBUG_ISSUE_XYZ"))) so you
would not even have to change code to re-enable the debugging code, just
call options(DEBUG_ISSUE_XYX=TRUE)).


Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Sat, Sep 2, 2017 at 7:54 AM, Suzen, Mehmet <msuzen at gmail.com> wrote:

> AFAIK block comment is not possible
> it needs to be implemented in R interpreter and defined in the
> parser.'If' solution is not elegant.
>
> On 2 September 2017 at 14:09, Uwe Ligges
> <ligges at statistik.tu-dortmund.de> wrote:
> >
> >
> > On 02.09.2017 11:40, Christian wrote:
> >>
> >> I consider it quite worth while to introduce into R syntax a nestable
> >> block comment like
> >>
> >> #{
> >> <block of code>
> >> }#
> >
> >
> > if(FALSE){
> > <block of code>
> > }
> >
> > Best,
> > Uwe Ligges
> >
> >
> >> It would make documentation more easily manageable and lucid.
> >> Is there considerable need for this.
> >>
> >> Please, comment on this.
> >> How about R core?
> >>
> >> Christian
> >
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > 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.
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>

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