const引用参数 [英] const reference parameters

问题描述

以下声明之间有区别吗？

Is there a difference between the following declarations?

void somefunc(const Person &p);
void somefunc(Person const &p);

推荐答案

。 const 绑定到其左边的类型...除非它是声明的第一部分，在这种情况下它绑定到右边。

there is no difference. const binds to the type to its left...unless it is the first part of the declaration in which case it binds to the right.

请参阅： https://isocpp.org/wiki/faq/const -correctness＃const-ref-alt

我个人认为 const T& x 读得更好。根据此，Bjarne也倾向于将 const 第一。特别是因为关键字最初被称为 readonly 和 readonly int x 更好地读取:-P。

Personally, I find that const T &x reads better. According to this, Bjarne also prefers to put the const first. Specifically because the keyword was originally going to be called readonly and readonly int x reads better :-P.

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