Difference between revisions of "Module:No globals"
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meta>Xiplus m (Reverted changes by 126.243.104.167 (talk) to last version by Legoktm) |
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| − | + | 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 06:48, 17 June 2018
Documentation for this module may be created at Module:No globals/doc
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)
