Editing Module:No globals
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| Latest revision | Your text | ||
| Line 1: | Line 1: | ||
local mt = getmetatable(_G) or {} | local mt = getmetatable(_G) or {} | ||
function mt.__index (t, k) | local oldIndex = mt.__index or function() return nil end | ||
if k ~= 'arg' then | mt.__index = function(t, k) | ||
if k ~= 'name' and k ~= 'arg' then | |||
error | error('Tried to read nil global ' .. tostring(k), 2) | ||
end | end | ||
return | return oldIndex(t, k) | ||
end | end | ||
local oldNewindex = mt.__newindex or rawset | |||
function mt.__newindex(t, k, v) | function mt.__newindex(t, k, v) | ||
if k ~= 'arg' then | if k ~= 'name' and k ~= 'arg' then | ||
error | error('Tried to write global ' .. tostring(k), 2) | ||
end | end | ||
oldNewindex(t, k, v) | |||
end | end | ||
setmetatable(_G, mt) | setmetatable(_G, mt) | ||