const正确性：const char const * const GetName const（// stuff）; [英] Const correctness: const char const * const GetName const (//stuff);

问题描述

标签为家庭作业，因为这是一个中期问题，我写道，我不明白答案。我被要求在以下语句中解释每个const的目的：

Labelled as homework because this was a question on a midterm I wrote that I don't understand the answer to. I was asked to explain the purpose of each const in the following statement:

const char const * const GetName() const { return m_name; };

那么，每个const的解释是什么？

So, what is the explanation for each of these consts?

推荐答案

从右边取。在; 之前的一个告诉客户端这是一个设计级const，即它不会改变对象的状态。 （将此视为只读方法。）

Take them from the right. The one before the ; tells the client this is a design level const i.e. it does not alter the state of the object. (Think of this as a read-only method.)

好，现在返回值：

const char const *const

这是一个常量指针。在这里我们去繁荣！您有一个额外的 const - 语法错误。以下是等价的： const T 或 T const 。如果你取出一个 const ，你会得到一个常量指针指向一个常量字符。这有帮助吗？

This is a constant pointer to okay ... here we go boom! You have an extra const -- a syntax error. The following are equivalent: const T or T const. If you take out a const you get a constant pointer to a constant characters. Does that help?

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