C++的局部类

/******************************************************************** 
 file name : CLK.h 
 author  :   Clark/陈泽丹 
 created :   2011-11-12 
 purpose :   C++的局部类
 好处：
 1，可以运用外层的Template参数
 2，该类不可对外用于继承
 3，减少类的出现和提高符号地域性
*********************************************************************/ 

#include <iostream>

using namespace std;

class Interface
{
public:
	virtual ~Interface(){}
	virtual void Show()
	{
		cout<<"Interface"<<endl;
	}
};

//转换接口
class Adapter
{
public:
	template<class T>
	Interface* MakeAdapter(T date)
	{
		class LocalInterface: public Interface
		{
		public:
			LocalInterface(T _Obj):m_Obj(_Obj){}
			~LocalInterface(){}
			virtual void Show()
			{
				cout<<"LocalInterface"<<m_Obj<<endl;
			}
		private:
			T m_Obj;
		};
		return new LocalInterface(date);
	}
};


void main()
{
	A a;
	Interface* pInterface = a.MakeAdapter(327);
	pInterface->Show();
	delete pInterface;
	system("pause");
}