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- Subject: Re: setting _ENV in Lua 5.2 when loading a file...?
- From: Jerome Vuarand <jerome.vuarand@...>
- Date: Thu, 10 Nov 2011 11:36:40 +0100
2011/11/10 Miles Bader <email@example.com>:
> In Lua 5.2, we can't call "setfenv", so ... what do we do?
_ENV is the first upvalue of a chunk, all you have to do is set that
upvalue before running it.
> I see that the "load" function takes an "env" (4th) parameter now, but
> loadfile doesn't; does this mean we can't use loadfile if we care about
> the loaded file's environment? That seems a bit annoying, as "load" in
> Lua is kind of primitive, and can't just be used easily with files like
> loadfile can...
local chunk = loadfile(filename)
debug.setupvalue(chunk, 1, environ)
> Also, what about from C? lua_load there _doesn't_ take an env
> parameter, so what should we do then...?
if (luaL_loadfile(L, filename))
lua_setupvalue(L, -2, 1);
lua_call(L, 0, 0);