Module:No globals

From 3D printer from scratch
Revision as of 23:31, 29 July 2015 by Legoktm (talk) (Fixing content model)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Documentation for this module may be created at Module:No globals/doc

Script error: Lua error: Internal error: The interpreter exited with status 126.

sh: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
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)