r - Get all Parameters as List

Question

Does R provide an object/function/method/keyword to get all function arguments?

Using an example: function(a, b="default", ...) would provide a and b as well as ... within the function environment. Is there a statement similar to list(...) that would also include a and b in the result?

Or put yet another way: a shorthand for list(a=a, b=b, ...), given function(a, b, ...)

Answer 1

One solution is to use:

tempf <- function(a, b = 2, ...) {
    argg <- c(as.list(environment()), list(...))
    print(argg)
}
tempf(1, c = 3)
$a
[1] 1

$b
[1] 2

$c
[1] 3

This creates a named list of the argument values.