Module:No globals

Lua

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This page has been nominated for deletion since 15 April 2024. To discuss it, please visit the nomination page. Do not remove this tag until the deletion nomination is closed. Reason for the nomination: see Commons:Deletion requests/Module:No globals

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Module:No globals is deprecated. Please see mw:Extension:Scribunto/Lua reference manual#strict instead. (all invocations)

Code

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)