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မေႃႇၵျူး:No globals

လုၵ်ႉတီႈ ဝီႇၶီႇဝွႆးဢဵတ်ႇꩡ် မႃး
[တူၺ်း] [မႄးထတ်း] [ပိုၼ်း] [ၸၢင်း] ၽိုၼ်ၵႅမ်မိုဝ်း

This module causes an error if any nil global is read or if any global is written to, with the exception of arg. To use, add require('Module:No globals') to the top of the module using it. The arg variable is excluded because it is necessary for Scribunto's require function to work properly. (See the Scribunto source code here.)

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)