Wikipedia>Erutuon: return rawget and rawset so as not to interfere with operation of module

2018-09-30T18:07:40Z

return rawget and rawset so as not to interfere with operation of module

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local mt = getmetatable(_G) or {}

local function print(val)
if type(val) == "table" then
local printout = {}
local i = 1
for k, v in pairs(val) do
table.insert(printout, ("[%s] = %s"):format(tostring(k), tostring(v)) )
i = i + 1
if i > 5 then
table.insert(printout, "...")
break
end
end
printout = { table.concat(printout, ", ") }
table.insert(printout, 1, "{")
table.insert(printout, "}")
return table.concat(printout)
elseif type(val) == "string" then
return '"' .. val .. '"'
else
return tostring(val)
end
end

mt.__newindex = function (self, key, value)
if key ~= "arg" then
mw.log("Global variable " .. print(key) .. " was set to "
.. print(value) .. " somewhere:",
debug.traceback("", 2))
end
return rawset(self, key, value)
end

mt.__index = function (self, key)
if key ~= "arg" then
mw.log("Nil global variable " .. print(key) .. " was read somewhere:",
debug.traceback("", 2))
end
return rawget(self, key)
end

setmetatable(_G, mt)

Module:Log globals - Revision history

Wikipedia>Erutuon: return rawget and rawset so as not to interfere with operation of module