Difference between revisions of "Module:No globals"

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Module:No globals (view source)

Revision as of 03:41, 1 March 2017

307 bytes removed ,  03:41, 1 March 2017
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>Hashar
m (5 revisions imported from w:en:Module:No_globals)
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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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