[Rd] Getting ... without evaluating it?

[Duncan Murdoch]

I'd like a function to get an unevaluated copy of its argument list, 
including ... .  That is, I'd like

f <- function(...) {
  args <- <what goes here??>
  args
}
when called as
f(a = 1+1, b = foo)
to return something like list(a = quote(1+1), b = quote(foo)).  If I use 
args <- list(...) then it tries to evaluate the arguments and dies 
(because foo doesn't exist).  If I use args <- substitute(...) then it 
gives just 1+1, it doesn't keep the names or give the whole list.

Is this possible?
Duncan Murdoch
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