按位常数和概念常数之间的区别？ [英] Difference between Bitwise constness and conceptual constness?

问题描述

在有效的C ++中......他们提到了BITWISE const和CONCEPTUAL contness ..

我感到困惑。

所以请帮我一些例子...

In Effective C++.. They mention the BITWISE const and CONCEPTUAL contness..
I am get confused.
so pls help me with some examples...

推荐答案

这里有一些（演员/可变）示例：

按位const意味着对象中的每个位都是永久的，因此对象的位图将永远不会改变。逻辑const意味着，虽然整个对象在概念上是不变的，但逐个成员可能会有变化 [ ^ ] :)）

There are some (cast/mutable) examples here:
Bitwise const means that every bit in the object is permanent, so a bit image of the object will never change. Logical const means that, although the entire object is conceptually constant, there may be changes on a member-by-member basis[^] :)

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