R devel - Jan 2005 - Any plans for commenting out region via something like " /* */ "?

Greetings from Switzerland!

Are there any plans/initiatives/considerations in future versions of R
for commenting out regions via something like " /*    */  "?

(I've got an application for which something like that would be
useful; if not, there are less simple solutions).

best,
-tony

"Commit early,commit often, and commit in a repository from which we can
easily
roll-back your mistakes" (AJR, 4Jan05).

A.J. Rossini
blindglobe@gmail.com

On Fri, 7 Jan 2005, A.J. Rossini wrote:
> Greetings from Switzerland!
>
> Are there any plans/initiatives/considerations in future versions of R
> for commenting out regions via something like " /*    */  "?
>
> (I've got an application for which something like that would be
> useful; if not, there are less simple solutions).
I normally use if(FALSE) {}: I also tend to use #if 0 #endif in C code, as 
otherwise you have to worry about nesting of comments.

We are currently working on internationalization of R, and a 2-char escape 
sequence doesn't look like a good idea to me.

Brian

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

"A.J. Rossini" <blindglobe@gmail.com> writes:
> Greetings from Switzerland!
> 
> Are there any plans/initiatives/considerations in future versions of R
> for commenting out regions via something like " /*    */  "?
I don't think so. Personally, I'd rather work on getting the parser to
behave properly in all cases on

if (FALSE){
...lots of lines...
} 

What did "C-c ;" do wrong anyway, Mr.ESS?
 
> (I've got an application for which something like that would be
> useful; if not, there are less simple solutions).
> 
> best,
> -tony
> 
> "Commit early,commit often, and commit in a repository from which we
can easily
> roll-back your mistakes" (AJR, 4Jan05).
...and commit to a branch or use #ifdef so that the daily package checks
don't break.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907

A.J. Rossini <blindglobe <at> gmail.com> writes:

: 
: Greetings from Switzerland!
: 
: Are there any plans/initiatives/considerations in future versions of R
: for commenting out regions via something like " /*    */  "?


You could use multiline character strings.  Just need to watch
out for embedded quotes.

I realize this thread is a bit old, but it only just came to my 
mind.  What about using a function like

commentOut <- function(expr) { invisible() }

and then

commentOut({
	a <- 10
	bladfkljasdlkfj()
	blah blah blah
})

Lazy evaluation prevents the expression from being evaluated so 
you don't have to worry about syntatic correctness.  And it nests 
too (I believe).

Belated US$0.02.

-roger

A.J. Rossini wrote:
> Greetings from Switzerland!
> 
> Are there any plans/initiatives/considerations in future versions of R
> for commenting out regions via something like " /*    */  "?
> 
> (I've got an application for which something like that would be
> useful; if not, there are less simple solutions).
> 
> best,
> -tony
> 
> "Commit early,commit often, and commit in a repository from which we
can easily
> roll-back your mistakes" (AJR, 4Jan05).
> 
> A.J. Rossini
> blindglobe@gmail.com
> 
> ______________________________________________
> R-devel@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
> 
-- 
Roger D. Peng
http://www.biostat.jhsph.edu/~rpeng/