Difference between revisions of "Module:No globals"
From BESA® Wiki
m (1 revision) |
(←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...') |
||
| (4 intermediate revisions by 2 users not shown) | |||
| 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('Tried to read nil global ' .. tostring(k), 2) | 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('Tried to write global ' .. tostring(k), 2) | error('Tried to write global ' .. tostring(k), 2) | ||
end | end | ||
| − | + | oldNewindex(t, k, v) | |
end | end | ||
setmetatable(_G, mt) | setmetatable(_G, mt) | ||
Revision as of 22:38, 23 April 2014
Documentation for this module may be created at Module:No globals/doc
Script error: Lua error: Internal error: Error reading from pipe.
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
error('Tried to read nil global ' .. tostring(k), 2)
end
return oldIndex(t, k)
end
local oldNewindex = mt.__newindex or rawset
function mt.__newindex(t, k, v)
if k ~= 'name' and k ~= 'arg' then
error('Tried to write global ' .. tostring(k), 2)
end
oldNewindex(t, k, v)
end
setmetatable(_G, mt)
