Module:No globals: Difference between revisions

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m Reverted edits by Mohamed Saed (talk) to last revision by Reception123
Line 2: Line 2:
function mt.__index (t, k)
function mt.__index (t, k)
if k ~= 'arg' then
if k ~= 'arg' then
error('Tried to view nil global ' .. tostring(k), 2)
error('Tried to read nil global ' .. tostring(k), 2)
end
end
return nil
return nil

Revision as of 05:09, 31 May 2019

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)
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