Module:No globals

From Boroondara Wiki
Revision as of 23:33, 20 June 2016 by Philip (talk | contribs) (Protected "Module:No globals": High traffic page ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite)))
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

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)