Module:No globals: Difference between revisions

    From Consumerium development wiki R&D Wiki
    (rm name exception)
     
    m (1 revision imported: Importing CS-1 templates and Template:Citation with the "include templates ticked")
     
    (2 intermediate revisions by 2 users not shown)

    Latest revision as of 20:47, 6 December 2020

    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)