Module:No globals: Difference between revisions

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m 1 revision imported: re-import with full revision
m 1 revision: Import from en.wp
Line 1: Line 1:
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)
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