Module:No globals

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Revision as of 04:03, 5 September 2017 by Anoop Rao (talk | contribs) (1 revision imported: https://www.mediawiki.org/wiki/Special:Export/Template:Done)
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Documentation for this module may be created at Module:No globals/doc 

local mt = getmetatable(_G) or {}
function mt.__index (t, k)
	if k ~= 'arg' then
		error('Tried to read nil global ' .. tostring(k), 2)
	end
	return nil
end
function mt.__newindex(t, k, v)
	if k ~= 'arg' then
		error('Tried to write global ' .. tostring(k), 2)
	end
	rawset(t, k, v)
end
setmetatable(_G, mt)
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