Re: How to append argument(s) to ...?

["Duncan Cross" <duncan.cross@...>]

On Tue, Nov 11, 2008 at 9:15 AM, Atry <pop.atry@gmail.com> wrote:

I tried the follow code, but it seems not work.

function a(...) return ..., "a" end
assert(select(3, a(1, 2)) == "a");

Is there any way to append a argument to vararg without `{...}' and `unpack' ?

It looks like this is handled in the same way as "return func_call(), a" where func_call returns multiple values. I.e., an _expression_ that evaluates to a list is truncated to the first item when it is itself used as an item in a list (except the last). So, no, I don't think there is a way. Perhaps the Lua team could be convinced that '...' should be treated as a special case in this situation. (I'm not convinced myself, though, to be fair. It seems like there should either be a way to specify that a list of values should be expanded rather than truncated - I'm not sure what the syntax would be - or keep it consistent.)

-Duncan