Module:No globals: Difference between revisions
Content added Content deleted
m (5 revisions imported from w:en:Module:No_globals) |
(Blanked the page) |
||
Line 1: | Line 1: | ||
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) |