Re: ... efficiency (was Re: class implementation)

[Adrian Sietsma <adrian_groups@...>]

Diego Nehab wrote:
> ...
>
> While we are at it, anyone thought about having ... as an "l-value"?
>
>     function capture(s, pat)
>         local i, j, ... = string.find(s, pat)
>         return ...
>     end
I would love this. Too many times I have to choose between
local ret,err,a,b,c,d = fn()
if not ret then f2(a,b,c,d) end

and
local t = {fn()}
if not t[1] then f2(unpack(t,3,table.maxn(t))) end

neither is pretty.

But how do we distinguish between the "vararg" "..." and the l-value "..." ?
Only ever allow one list, I think, so l-value overwrites previous "..."

Adrian