lua prototype class

Class = {}

function Class.__create(self,...)
local a = {}
local mt = {__index = self, __call = self.__create}
setmetatable(a,mt)
if a.__new then a:__new(...) end
return a
end

function Class.__new(self,name) self.__classname = name end

Class_mt = {__call=Class.__create}
setmetatable(Class,Class_mt)

Animal = Class("Animal")
function Animal:__new(type) self.type = type end
function Animal:talk() print(self.type, self.say) end
function Animal:say(text) self.say = text end

dog = Animal("dog")
dog:say("ciao")
dog:talk()

cat = Animal("cat")
cat:say("hi")
cat:talk()

print(dog.__classname,cat.__classname)