Module:No globals: Difference between revisions
Jump to navigation
Jump to search
Content added Content deleted
(←Created page with 'local mt = getmetatable(_G) or {} local oldIndex = mt.__index or function() return nil end mt.__index = function(t, k) if k ~= 'name' and k ~= 'arg' then erro...') |
m (8 revisions imported from wikipedia:Module:No_globals) |
||
(9 intermediate revisions by 7 users not shown) | |||
Line 1: | Line 1: | ||
local mt = getmetatable(_G) or {} |
local mt = getmetatable(_G) or {} |
||
function mt.__index (t, k) |
|||
⚫ | |||
mt.__index = function(t, k) |
|||
⚫ | |||
error('Tried to read nil global ' .. tostring(k), 2) |
error('Tried to read nil global ' .. tostring(k), 2) |
||
end |
end |
||
return |
return nil |
||
end |
end |
||
local oldNewindex = mt.__newindex or rawset |
|||
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 |
||
rawset(t, k, v) |
|||
end |
end |
||
setmetatable(_G, mt) |
setmetatable(_G, mt) |
Latest revision as of 21:05, 13 May 2021
Documentation for this module may be created at Module:No globals/doc