ltimaginea

@shaneasd In my opinion, the class Foo's data members are standard-library container types (incl. `string`) and the `int` type, they can handle self-assignment elegantly and efficiently. That's why it has...

@jwakely OK, I have understood that C.65 the final example is a "don't do it this way" example. However, it is too misleading for readers. I think the final example...

@CutieDeng Hi，朋友，感谢交流。 关于上条评论中，你的代码的不足之处在于： - `decltype(ptr) :: element_type` 获得的是基类类型，因此将会发生slicing（切片），见 [ES.63: Don't slice - C++ Core Guidelines](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Res-slice) 。 - 多态基类UnsafeClass忘记了将其析构函数定义为 **virtual** 的，见 [C.127: A class with a virtual function should have a...