执行中断返回指令;
从调用函数处返回指针后,将在指定的返回指令指针处恢复执行。
Upon returning from the called function, execution will resume at the saved return-instruction pointer as specified.
不然你怎么使用返回指令创建并返回一个对象而不使用复制构造函数?
How else could you use that return instruction to create and return an object and yet not use the copy constructor?
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