引用和对象切片 [英] References and Object Slicing

问题描述

我没有我的有效C ++与我，这是错误我这么多，我必须要求我自己的理智。给定

I don't have my Effective C++ with me and this is bugging me so much that I have to ask for my own sanity. Given

class Foo : public Bar{}

void MyFunc(Bar &_input);

如果我通过 Foo 我纠结于切片问题，还是我避免了？

If I pass in a Foo, am I tangling with the slicing problem or have I avoided it?

推荐答案

不是一个问题，因为你传递一个引用。您不是创建一个新对象，只是让MyFunc访问原始对象。

Not a problem, because you're passing in a reference. You're not creating a new object, just letting MyFunc access the original object.

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