C ++中的void指针的缺点 [英] drawbacks of a void pointer in C++

问题描述

就我所知，C ++中的一个void指针 void * 可以指向任何东西。这可能是非常有用的（对我来说）如果我想开发一个解决方案，而不使用某种继承。但是我想知道的是，这种方法是否有任何性能上的缺点？

A far as I know, a void pointer in C++ void* can point to anything. This might be quite useful (for me) if I want to develop a solution without using some sort of inheritance. But the question I want to know is whether there is any performance drawbacks in this approach?

推荐答案

最大的缺点是，的void指针阻止编译器执行类型检查。特别是在支持面向对象原则的语言中，我认为大量使用void指针是很奇怪的。

The biggest drawback is that making use of void pointers stops the compiler from being able to enforce type checking. Especially in a language that supports object oriented principles, I think it would be strange to be making heavy use of void pointers.

你更可能在C中找到void指针以模仿一些多态行为，但存在相同的类型安全问题。

You are more likely to find void pointers in C to mimic some polymorphic behavior, but the same type-safety concerns exist.

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