Re: Explanation needed for setfenv replacement for Lua 5.2

[Lorenzo Donati <lorenzodonatibz@...>]

On 06/05/2011 15.23, steve donovan wrote:

[...]

> That is a very cute piece of code - bordering on abuse, maybe, but it
> looks good!
>
> Let me see if I get it:
>
> function env(tbl)
>    return function(_,second_iteration)
>       if second_iteration then return nil end
>       return tbl
>    end
> end
>
> for _ENV in env {print=print,A=1,B=2} do
>     print(A,B)
> end
>
> The in statement reappears ...
>
> steve d.

Ok. But besides being a stress test for Lua 5.2 syntax and a proof of 
concept, isn't it a complicated way to do the following:

--------------
do local _ENV = {print=print,A=1,B=2}
  print(A,B)
end
-------------

in the end? Or am I missing something?

Cheers.

--
Lorenzo