正确使用const_cast<> [英] Correct usage(s) of const_cast<>

问题描述

作为一个常见的规则，在C ++代码中使用 const_cast<>（）常常被认为是一种不好的做法，因为它揭示了（大部分时间）a设计中的缺陷。

虽然我完全同意这一点，但是我不知道什么是使用 const_cast< code>是 ok 和唯一解决方案。

你能给我一些例子

解决方案

const_cast 也用于删除 volatile 修饰符，这在这篇有争议的文章中已经付诸实践：

http://www.drdobbs.com/184403766

As a common rule, it is very often considered a bad practice to use const_cast<>() in C++ code as it reveals (most of the time) a flaw in the design.

While I totally agree with this, I however wonder what are the cases were using const_cast<>() is ok and the only solution.

Could you guys please give me some examples you know/you encountered ?

Thank you very much.

解决方案

const_cast is also used to remove volatile modifiers, as put into practice in this (controversed) article:

http://www.drdobbs.com/184403766

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