重载预增量运算符

Question

声明如下：

 Iterator operator++();//pre-increment

定义如下：

LinkedList::Iterator& LinkedList::Iterator::operator++(){
   return Iterator(current->next);//this is giving me an error
}

这是 class 的样子

class LinkedList{
public:
    Node struct{
      /*contains pointer to next node and an integer value*/
      int val;
      Node* next;
    };
    class Iterator{
    public:
      Iterator& operator++();//pre-increment
    protected:
      Node* current;//points to current node
    }
}

Answer 1

您创建了一个 new 迭代器对象，并（尝试）return 对其进行引用。

前缀递增运算符修改this对象，并且应该return对自身的引用：

current = current->next;  // TODO: Add checking for not going out of bounds or dereferencing a null pointer
return *this;

重载预增量运算符

Overloading Pre-Increment Operator

c++

overloading

linked-list

operators

c++11