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Module:No globals: Difference between revisions

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m Changed protection level for "Module:No globals": Used in interface MediaWiki:Protectedpagetext ([Edit=Require administrator access] (indefinite) [Move=Require administrator access] (indefinite))
 
Created page with "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.__newi..."
(No difference)

Revision as of 11:43, 20 August 2019

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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