In a reference-based object model, an object is represented as a reference (a pointer a hle) that refers to a memy block in which data members pointers to functions are sted.

• 这里和c++的唯一区别是,引用对象模型中所有对象都如何如何(比如在堆上分配)。但是在c++中，这只是一种选择。