[Rd] internal manipulation of ...

[Hadley Wickham]

Could you pass the environment and then look for the object called ... in it?

f <- function(...) {
  .Call("my_fun", environment())
}

I think (and may well be wrong) that you can use standard tools to
find the DOTSXP object in that environment.

Hadley


On Thu, Dec 12, 2013 at 2:32 PM, Romain François
<romain at r-enthusiasts.com> wrote:
> Hello,
>
> I’m looking for examples on how to manipulate the ... internally, e.g. in a .Call or .External function.
>
> I’m particularly interested in accessing the environment in which each contribution to ... can be evaluated.
>
> So far, I’m using tricks involving passing down the sys.calls() and sys.frames() down to the C function. The documentation in http://cran.r-project.org/doc/manuals/R-ints.html#Dot_002ddot_002ddot-arguments did not help me a lot.
>
> Romain
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