Difference between revisions of "Module:No globals"

Jump to navigation Jump to search
(don't bother saving old __index or __newindex)
m (1 revision imported)
 
(8 intermediate revisions by 5 users not shown)
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
Line 7: Line 7:
 
end
 
end
 
function mt.__newindex(t, k, v)
 
function mt.__newindex(t, k, v)
if k ~= 'name' and k ~= 'arg' then
+
if k ~= 'arg' then
 
error('Tried to write global ' .. tostring(k), 2)
 
error('Tried to write global ' .. tostring(k), 2)
 
end
 
end

Latest revision as of 13:45, 5 July 2020

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)