Prof Brian Ripley wrote:
On Thu, 19 May 2005, Duncan Murdoch wrote:
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.
f <- function(...) as.list(match.call())[-1]
f(a = 1+1, b = foo)
$a
1 + 1
$b
foo
(which is what list(a = quote(1+1), b = quote(foo)) prints as).
Thanks!
Duncan Murdoch
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