C++ template 中的class 和 typename 的区别示例

转载

https://blog.youkuaiyun.com/Function_Dou/article/details/84644963

 

可以先看看上面的文章,下面是示例

template<class T>
class people
{
public:
	typedef T	value_type;
	typedef T*	pointer;
	typedef T&	reference;
};

template<class T>
struct man
{
public:
	typedef typename T::value_type	value_type;
	typedef typename T::pointer		pointer;
	typedef typename T::reference	reference;
	void print()
	{
		TRACE("%s\r\n", typeid(value_type).name());//输出int
		TRACE("%s\r\n", typeid(pointer).name());//输出int * 
		TRACE("%s\r\n", typeid(reference).name());//输出 int
	}
};

void CMFC2017Dlg::OnBnClickedBtnAxcryptTest28()
{
	// TODO: 正则A
	man<people<int>> Man;
	Man.print();
}