通过引用传递向量 [英] Passing vectors by reference

问题描述

如果我有一个类中的对象的向量，我想在另一个类中改变，我会尝试并通过引用传递所有的信息。

If I have a vector of objects in one class which I want to change in another, I would try and pass all the information by reference.

我需要通过参考吗？向量？对象？两个？

What exactly do I need to pass by reference though? The vector? The objects? Both?

我要求的基本上是：这些之间有什么区别？

Essentially what I'm asking is: What is the difference between these?

vector&<object> blah; // A reference to a vector of objects?

vector<object&> blah; // A vector of references to objects?

vector&<object&> blah; // A reference to a vector of references to objects???

我实际上不确定如何引用数组类容器的工作原理。这些是合法的吗？

I'm not actually sure how referencing of array like containers work. Are these legal?

推荐答案

vector&< object> 语法错误。 向量< object&> 无效，因为向量的值类型必须可分配。 矢量&< object&> blah 是语法错误。

vector&<object> is a syntax error. vector<object&> is invalid, because a vector's value type must be assignable. vector&<object&> blah is a syntax error.

对向量的引用是向量< T>& 。

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