Difference between revisions of "Module:No globals"
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what>Mattflaschen-WMF m (Reverted edits by 108.173.191.133 (talk) to last revision by Hashar) |
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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 04:00, 1 March 2017
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)
