c++重载 operator -＞

最新推荐文章于 2024-12-12 22:08:18 发布

kevin_darkelf

最新推荐文章于 2024-12-12 22:08:18 发布

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重载 -> 运算符
示例如下

不能是静态函数
返回 T的指针，再调用T->

<type T>
class Pointer
{
	Pointer(const T* t) : _target(t)
	T * operator ->() 
	{
	    return _target
	}
	T* _target;
};

This is the only really tricky one. It must be a nonstatic member function, and it takes no arguments. The return value is used to perform the member lookup.
If the return value is another object of class type, not a pointer, then the subsequent member lookup is also handled by an operator-> function. This is called the “drill-down behavior.” The language chains together the operator-> calls until the last one returns a pointer.