Module:No globals: Difference between revisions

From Meta Wiki
Jump to navigation Jump to search
← Older editNewer edit →
m>Ged UK
m Protected Module:No globals: High-risk Lua module ([Edit=Allow only template editors and admins] (indefinite) [Move=Allow only template editors and admins] (indefinite))
m>Jackmcbarn
rm name exception
Line 1: Line 1:
local mt = getmetatable(_G) or {}
local mt = getmetatable(_G) or {}
function mt.__index (t, k)
function mt.__index (t, k)
if k ~= 'name' and k ~= 'arg' then
if k ~= 'arg' then
error('Tried to read nil global ' .. tostring(k), 2)
error('Tried to read nil global ' .. tostring(k), 2)
end
end

Revision as of 15:35, 2 May 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 ~= '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)
Retrieved from "https://meta.skywiki.org/wiki/Module:No_globals?oldid=2486"