本文介绍了逻辑和物理常数之间的差异的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
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，，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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