C返回一个对象副本

class MyObjectHolder {
public:
    std::vector<int> getMyObject() const {
        return myObject;
    }

private:
    std::vector<int> myObject;
};

在我的程序的某些时候,我尝试使用getMyObject方法并在检索到的对象上仅使用const方法：

const std::vector<int> myObject = myObjectHolder.getMyObject();
myObject.size();
int a = myObject.front();

>现在,编译器是否可能优化此代码,以便没有std :: vector< int>的副本.完成？

Is it somehow possible that the compiler determines that I’m only using the const methods on the retrieved object (and let’s assume there is no mutable nonsense happening behind it) and it would not make any copies of the objects and perform these const operations on the private member of the MyObjectHolder instead?

>如果是,如果我没有明确声明const std :: vector< int> myObject as const？
>如果不是,不这样做的原因是什么？在这种情况下,这种优化将难以实现/推断它可能并在这里更正/等…？