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 Fran?ois
<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