c++11 - C++中#pragma后面加个名字在文件中有什么作用

Question

#pragma CommonUrlImageView

class CommonUrlImageView;


class CommonUrlImageView: public CAImageView
{
   ....
}

还有class CommonUrlImageView 写两遍有何用意？

Answer 1

#pragma

Should be a quick index of text

The previous class is usually a forward declaration

---

Please correct me if I’m wrong