Module:No globals: Difference between revisions
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(don't bother saving old __index or __newindex) |
(setting doesn't need exception for name) |
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Line 7: | Line 7: | ||
end |
end |
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function mt.__newindex(t, k, v) |
function mt.__newindex(t, k, v) |
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if |
if k ~= 'arg' then |
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error('Tried to write global ' .. tostring(k), 2) |
error('Tried to write global ' .. tostring(k), 2) |
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end |
end |
Revision as of 20:48, 23 April 2014
Documentation for this module may be created at Module:No globals/doc
local mt = getmetatable(_G) or {}
function mt.__index (t, k)
if k ~= 'name' and 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)