Difference between revisions of "Module:No globals"

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what>Hashar
m (5 revisions imported from w:en:Module:No_globals)
(Blanked the page)
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)
 

Revision as of 03:41, 1 March 2017