class_test.lua

local Class = setmetatable({
  new = function(arg1, arg2, arg3)
    local obj = {}
      obj.var1 = arg1
      obj.var2 = arg2
      obj.var3 = arg3
      
      obj.out = function (self, arg)
          print(self[arg])
      end
  
  return obj
  end
}, {__call = function(_, ...) return Class.new(...) end})
 
test = Class("One", "Two", "Three")
test:out("var1")
print(test.var1)