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m 3 revisions imported from commons:Module:No_globals: Introducing this template for use by me and other CU's |
m 1 revision imported |
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local mt = getmetatable(_G) or {} | local mt = getmetatable(_G) or {} | ||
function mt.__index (t, k) | function mt.__index (t, k) | ||
Revision as of 00:48, 29 October 2020
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)