Deriving from a singleton

#include <memory>class non_copyable{protected:	non_copyable() {}	~non_copyable() {}private:	non_copyable(const non_copyable &);	non_copyable & operator=(const non_copyable &);};template <class T>class singleton : non_copyable{public:	static T * Instance()	{		if (!_object.get()) //Not yet created			_object = std::auto_ptr<T>(new T);		return _object.get();	}protected:	singleton() {}	virtual ~singleton() {}	static std::auto_ptr<T> _object; //auto_ptr ensures T is deleted at end};template <class T>std::auto_ptr<T> singleton<T>::_object; //Initilize static variable

class MyClass : public singleton<MyClass>{public:	friend singleton<MyClass>;	friend std::auto_ptr<MyClass>;	//Stuffprivate:	MyClass() {}	virtual ~MyClass() {}};