Module:No globals

-- Reduces chances of errors by preventing nil global variables from being written to or read -- Syntax : require('Module:No globals') on top of module 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)