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引用类型无法在模板中添加 const 等属性，这情况什么是怎么回事？
source link: https://www.zhihu.com/question/476815008/answer/2035231815
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引用类型无法在模板中添加 const 等属性，这情况什么是怎么回事？
template<typename T> void test() { std::cout << std::is_same_v<const T, in…
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是的，对引用类型进行add_const操作是空动作。
add_cvProvides the member typedeftypewhich is the same asT, except it has a cv-qualifier added (unlessTis a function, a reference, or already has this cv-qualifier)
引用的底层是没有const的说法的，只有顶层有const。换句话说引用本身是const不可修改的，而它引用的对象可以有const属性。
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