多重继承往往导致virtual base classes(虚拟基类)的需求.在non-virtual base的情况下,如果派生类对于基类有多条继承路径,那么派生类会有不止一个基类部分,让基类为virtual可以消除...
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不支持访问从虚拟基类继承的数据字段。
Access to data fields inherited from a virtual base class is not supported.
派生类继承虚拟基类的虚函数的多个重写。
The derived class inherits more than one override of a virtual function of a virtual base class.
例如，Microsoft Compiler 使用进程无关的偏移量来为虚拟继承类指定基对象，因而不存在这个问题。
For instance, Microsoft Compiler uses process-neutral offsets to address base objects for virtually inherited classes: thus, this issue does not arise.
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