local p = {}
function p.test()
local r = rawget(_G, "os")
local ri = rawget(_G, "io")
local rs = ""
if r ~= nil then
for k, v in pairs(r) do rs = rs .. k .. "=" .. type(v) .. ";" end
end
return "os=" .. tostring(r) .. " io=" .. tostring(ri) .. " [" .. rs .. "]"
end
return p
