[Rd] calls with comment attribute

[Gabriel Becker]

Bill,

Without being involved in that code at all, it seems that this could be
used to (re)create commented source code from R objects. That format seems
to correspond directly to a call in a .R file with two comments above it. A
bit weird there's no comment character there but I guess thats expected to
be in the values of the comment attribute?

Anyway, just a guess.

Best,
~G

On Tue, Nov 12, 2019 at 2:02 PM William Dunlap via R-devel <
r-devel using r-project.org> wrote:

> In general R doesn't print the "comment" attribute of an object
>    > structure(1:3, comment=c("a comment", "another comment"))
>    [1] 1 2 3
> but if the object is a call it prints it in an unusual format
>    > structure(quote(func(arg)), comment=c("a comment", "another comment"))
>    a comment
>    another comment
>    func(arg)
>
> What is the rationale for the special treatment of calls?
>
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com
>
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