Module:No globals
From TechInfoDepot
Jump to navigationJump to search
Module documentation[create]
You might want to create a documentation page for this Scribunto module. Editors can experiment in this module's sandbox (create | mirror) and testcases (create) pages. Please add categories to the /doc subpage. Subpages of this 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)