如何创建和使用类箭头运算符? [英] How do I create and use a class arrow operator?

问题描述

因此，在对其进行了所有研究之后，我似乎找不到如何创建类箭头运算符的方法，即

So, after researching everywhere for it, I cannot seem to find how to create a class arrow operator, i.e.,

class Someclass
{
  operator-> ()  /* ? */
  {
  }
};

我只需要知道如何使用它并正确使用它. -它的输入是什么? -它返回什么? -如何正确声明/制作原型?

I just need to know how to work with it and use it appropriately. - what are its inputs? - what does it return? - how do I properly declare/prototype it?

推荐答案

运算符->用于重载成员访问权限.一个小例子:

The operator -> is used to overload member access. A small example:

#include <iostream>
struct A 
{
    void foo() {std::cout << "Hi" << std::endl;}
};

struct B 
{
    A a;
    A* operator->() {
        return &a;
    }
};

int main() {
    B b;
    b->foo();
}

这将输出:

Hi

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