Re: Function as metatable (metafunctions?)

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• Subject: Re: Function as metatable (metafunctions?)
• From: "Thiago L." <fakedme@...>
• Date: 2014年3月31日 15:39:51 -0300

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On 31/03/2014 14:28, Coda Highland wrote:

On Mon, Mar 31, 2014 at 10:14 AM, Petite Abeille
<petite.abeille@gmail.com> wrote:

On Mar 31, 2014, at 2:57 AM, Thiago L. <fakedme@gmail.com> wrote:

I mean I can't set __metatable to a function so…

Eh?
local aFunction = function() end
debug.setmetatable( aFunction, { __tostring = function() return 'm e t a f u n c t i o n' end } )
print( aFunction )

That's setting the metatable OF a function.
What doesn't work is:
debug.setmetatable( aFunction, function(key) return --[[magic]] end )
I myself am still trying to figure out the exact USE case, but I at
least know what's being asked for.
/s/ Adam

local stringmetatable = getmetatable("")
debug.setmetatable("", function(key)
if key == "__metatable" then
-- some magic
else

-- some other magic to get the env and do stuff (and then we use the stuff from the __metatable hack)

end)

Or something like that... (and then you can just do getmetatable("").__index = whatever instead of getmetatable("")().__index = whatever, so it's seamless sandboxing)

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• Follow-Ups:
  • Re: Function as metatable (metafunctions?), Dirk Laurie

• References:
  • Function as metatable (metafunctions?), Thiago L.
  • Re: Function as metatable (metafunctions?), Petite Abeille
  • Re: Function as metatable (metafunctions?), Coda Highland

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