逻辑和物理常数之间的差异 [英] difference between logical and physical const-ness

问题描述

这两个术语之间有什么区别，为什么我需要 mutable ？

What is the difference between these two terms, and why do I need mutable?

推荐答案

Scott Meyers， Effective C ++ ，第3项：

Scott Meyers, Effective C++, Item 3:

尽可能使用 const

示例）。它难以写得比Scott更好！

has an excellent discussion (with examples) on this topic. Its hard to write better than Scott!

请注意，physical-constness也被称为bitwise-constness。

Note also that physical-constness is also known as bitwise-constness.

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