Any plans for commenting out region via something like " /* */ "?

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).

This doesn't work too well, unfortunately. Firstly the argument(s) of
commentOut are still parsed, so if there is a syntax error (which creates
a problem during parsing), execution is halted. Furthermore, while
a series of statements (separated by newlines or semicolons) is not
acceptable as a function argument, so this approach is limited to
commenting out pieces that represent single expressions.

Best regards, Jan

+- Jan T. Kim -------------------------------------------------------+
 |    *NEW*    email: jtk@cmp.uea.ac.uk                               |
 |    *NEW*    WWW:   http://www.cmp.uea.ac.uk/people/jtk             |
 *-----=<  hierarchical systems are for files, not for humans  >=-----*