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Module:No globals: Difference between revisions
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4 revisions imported from wikipedia:Module:No_globals: see Topic:Vtixlm0q28eo6jtf
m>Jackmcbarn (don't bother saving old __index or __newindex) |
m (4 revisions imported from wikipedia:Module:No_globals: see Topic:Vtixlm0q28eo6jtf) |
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local mt = getmetatable(_G) or {} | local mt = getmetatable(_G) or {} | ||
function mt.__index (t, k) | function mt.__index (t, k) | ||
if | if k ~= 'arg' then | ||
error('Tried to read nil global ' .. tostring(k), 2) | error('Tried to read nil global ' .. tostring(k), 2) | ||
end | end | ||
| Line 7: | Line 7: | ||
end | end | ||
function mt.__newindex(t, k, v) | function mt.__newindex(t, k, v) | ||
if | if k ~= 'arg' then | ||
error('Tried to write global ' .. tostring(k), 2) | error('Tried to write global ' .. tostring(k), 2) | ||
end | end | ||