lua objects and inheritance

["Michael Cumming" <Mike.C@...>]

I have been following the examples in the book and have a question about inheritance.  I can see how it works for a single parent/child but what about parent/child1/child2?

 

parent = {

    New = function (self,o)
     o = o or {}
        setmetatable (o,self)
       self.__index = self
    end,

    Quit = function (self)
    end
 
}

child1 = {

    New = function (self,o)
     o = parent:New (o or {})
        setmetatable (o,self)
        self.__index = self
    end,

    Quit = function (self)
        parent.Quit (self)
    end
 
}

child2 = {

    New = function (self,o)
     o = child1:New (o or {})
        setmetatable (o,self)
        self.__index = self
    end,

    Quit = function (self)
        child1.Quit (self)
    end
 
}