Module:No globals
Revision as of 13:51, 16 March 2016 by Alex Jiang (talk | contribs) (1 revision imported: wikipedia infobox template import)
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)
