Module:No globals
From D&D 5e
Revision as of 03:58, 24 April 2014 by Ged UK (talk) (Protected Module:No globals: High-risk Lua module ([Edit=Allow only template editors and admins] (indefinite) [Move=Allow only template editors and admins] (indefinite)))
Documentation for this module may be created at Module:No globals/doc
local mt = getmetatable(_G) or {}
function mt.__index (t, k)
if k ~= 'name' and 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)
