版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/davidsher_zhou/article/details/81104637
template<class T>
class auto_ptr {
public:
explict auto_ptr(T *p = 0);
template<class U>
auto_ptr(auto_ptr<U>& rhs);
~auto_ptr();
template<class U>
auto_ptr<T>& operator=(auto_ptr<U>& rhs);
T& operator*() const;
T* operator->() const;
T* get() const;
T* release();
void reset(T *p = 0);
private:
T *pointee;
template<class U>
friend class auto_ptr<U>;
};
template<class T>
template<class U>
inline auto_ptr<T>::auto_ptr(auto_ptr<U>& rhs) : pointee(rhs.release()) {}
template<class T>
inline auto_ptr<T>::~auto_ptr() { delete pointee; }
template<class T>
template<class U>
inline auto_ptr<T>& auto_ptr<T>::operator=(auto_ptr<T>& rhs)
{
if(this != &rhs) reset(rhs.release());
return *this;
}
template<class T>
inline T& auto_ptr<T>::operator*() const { return pointee; }
template<class T>
inline T* auto_ptr<T>::operator->() const { return pointee; }
template<class T>
inline T* auto_ptr<T>::get() const { return pointee; }
template<class T>
inline T* auto_ptr<T>::release()
{
T* oldPointee = pointee;
pointee = 0;
return oldPointee;
}
template<class T>
inline void auto_ptr<T>::reset(T*p)
{
if(pointee != p) {
delete pointee;
pointee = p;
}
}
//所有函数都定义在class定义区内:
template<class T>
class auto_ptr {
public:
explicit auto_ptr(T *p = 0) : pointee(p) {}
template<class U>
auto_ptr(auto_ptr<U>& rhs) : pointee(rhs.release()) { }
~auto_ptr() { delete pointee: }
template<class U>
auto_ptr<T>& operator=(auto_ptr<U>& rhs)
{
if(this != &rhs) reset(rhs.release());
return *this;
}
T& operator*() const { return *pointee; }
T* operator->()const { return pointee; }
T* get() cosnt { return pointee; }
T* release()
{
T *oldPointee = pointee;
pointee = 0;
return oldPointee;
}
void reset(T *p = 0)
{
if(pointee != p) {
delete pointee;
pointee = p;
}
}
private:
T* pointee;
template<class U> friend class auto_ptr<U>;
};