Thanks for your help. I had two concerns about using as: that it would
impose some overhead, and that it would require me to code an explicit
conversion function. I see now that the latter is not true; I don't
know if the overhead makes much difference.
On Thu, 2009-12-03 at 13:00 -0800, Martin Morgan wrote:
> setMethod("Arith", signature(e1="numeric", e2="B"), function(e1, e2) {
> new("B", xb=e1...@xb, callGeneric(e1, as(e2, "A")))
> })
Things were getting too weird, so I punted and used explicitly named
function calls for the multiplication operation that was causing
trouble.
Ross
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