Last modified on 12 March 2019, at 21:29

Module:No globals

Revision as of 21:29, 12 March 2019 by Xaosflux (Talk) (Changed protection level for "Module:No globals": Used in interface MediaWiki:Protectedpagetext ([Edit=Require administrator access] (indefinite) [Move=Require administrator access] (indefinite)))

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)