Listing 5: <memory>, part 6

        // TEMPLATE CLASS auto_ptr
template<class T>
    class auto_ptr {
public:
    typedef T element_type;
    explicit auto_ptr(T *p= 0)
        : Owns(p != 0), Ptr(p) {}
///    template<class U>
    typedef T U;    ///
    auto_ptr(const auto_ptr<U>& y)
        : Owns(y.Owns), Ptr((T *)y.release()) {}
///    template<class U>
    auto_ptr<T>& operator=(auto_ptr<U>& y)
        {if ((void *)this != (void *)&y)
            {if (Owns)
                delete Ptr;
            Owns = y.Owns;
            Ptr = (T *)y.release(); }
        return (*this); }
    ~auto_ptr()
        {if (Owns)
            delete Ptr; }
    T& operator*() const
        {return (*get()); }
    T *operator->() const
        {return (get()); }
    T *get() const
        {return (Ptr); }
    T *release() const
        {((auto_ptr<T> *)this)->Owns = false;
        return (Ptr); }
private:
    bool Owns;
    T *Ptr;
    };
/* End of File */