构造函数、复制构造、赋值操作、移动构造、移动操作

 

 

参考:

https://blog.csdn.net/jofranks/article/details/17438955

https://www.cnblogs.com/lustar/p/7512198.html

http://www.cnblogs.com/BlueTzar/articles/1223313.html