50compat.lua

-- compat
local unpack = table.unpack or unpack
local print = print
local debug = debug
local table = table
local _ENV = setmetatable({}, {__index=function(t,k)
  if (k ~= 'arg') then
    error("undefined global "..k)
  end
  local res = {}
  local i = -1
  while true do
    local n, v = debug.getlocal(2, i)
    i = i - 1
    if not n then return res end
    table.insert(res, v)
  end
end})


-- 5.1 code follows
function x(...)
  print(unpack(arg))
end

x(1,2,3)