Re: Lua registry, environment, and threads.

[Frank Meier-Dörnberg <frank@...>]

Leo Razoumov schrieb:
> On 2010-01-09, steve donovan <steve.j.donovan@gmail.com> wrote:
>   
> >  (BTW, a safer 5.2 idom is:
> >
> >  local loadstring = loadstring
> >  in {x = 1, y = 10} do fn = loadstring 'return x + y' end
> >
> >  Given that loadstring is potentially a nasty function in a sandbox)
> >
> >  steve d.
> >     
>
> Can one do the following instead?
>
> local fn = loadstring 'return x + y' --first compile the chunk for future use
>
> in {x = 1, y = 10, print=print} do print(fn()) end  -- 11
> in {x = 2, y = 20, print=print} do print(fn()) end  -- 22
>
> --Leo--
>
>   
Potentially I totally missed the point, but if isolation is the problem, 
what is with (untestet):

local fn = loadstring ' function(env) do' .. 'return x + y' .. 'end'

in {} do print(fn{x = 1, y = 10, print=print}) end -- 11
in {} do print(fn{x = 2, y = 20, print=print}) end -- 22

?
Frank