为什么我不能制作参考向量?

Why can#39;t I make a vector of references?(为什么我不能制作参考向量?)

问题描述

当我这样做时:

std::vector<int> hello;

一切都很好.但是，当我将其设为引用向量时:

Everything works great. However, when I make it a vector of references instead:

std::vector<int &> hello;

我收到像

错误 C2528:指针":指向引用的指针非法

error C2528: 'pointer' : pointer to reference is illegal

我想将一堆对结构的引用放入一个向量中，这样我就不必干预指针了.为什么vector会对此大发雷霆?使用指针向量是我唯一的选择吗?

I want to put a bunch of references to structs into a vector, so that I don't have to meddle with pointers. Why is vector throwing a tantrum about this? Is my only option to use a vector of pointers instead?

推荐答案

vector 这样的容器的组件类型必须是 可分配.引用是不可赋值的(你只能在声明时初始化它们一次，并且以后不能让它们引用其他东西).其他不可分配的类型也不允许作为容器的组件，例如vector 是不允许的.

The component type of containers like vectors must be assignable. References are not assignable (you can only initialize them once when they are declared, and you cannot make them reference something else later). Other non-assignable types are also not allowed as components of containers, e.g. vector<const int> is not allowed.

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