Module:No globals

https://www.mediawiki.org/wiki/Module:No_globals/doc This is a deprecated module, and if anyone can import the module 'strict' this should be removed. In the meantime, this will allow certain templates to function.

General

This module is deprecated in most use cases, use strict library: require( "strict" )

Usage

Include this module at the top of your code. An error will be raised any time your code tries to read or write to a non-local (undeclared) variable.

---

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)