Re: setfenv/getfenv

[Petite Abeille <petite.abeille@...>]

On Jan 12, 2010, at 4:25 PM, Roberto Ierusalimschy wrote:

>  code = "string with the code to be loaded"
>  f = loadstring("in ... do " .. code .. " end")

Hmmm... not sure if all that serialization to string is a step forward... e.g.:

-- using setfenv

local debug = require( 'debug' )

local function Test( anIndex )
    print( anIndex, foo )
end

debug.setfenv( Test, { print = print } )
Test( 1 )

debug.setfenv( Test, { print = print, foo = _VERSION } )
Test( 2 )

-- vs. using string.dump + loadin

local aChunk = string.dump( Test )

loadin( { print = print }, aChunk )( 3 )
loadin( { print = print, foo = _VERSION }, aChunk )( 4 )

> 1	nil
> 2	Lua 5.2
> 3	nil
> 4	Lua 5.2

The second version seems a rather whereabout way of doing things, no?