智能指针之scopedptr

话不多说直接上代码:

#include<iostream>
using namespace std;
#include<cassert>
template<class T>
class Scopedptr
{
public:
    Scopedptr(T* ptr = nullptr) :_ptr(ptr)
    {}
    T *operator->()
    {
        return _ptr;
    }
    T &operator*()
    {
        return *_ptr;
    }
    void reset(T *ptr = nullptr)
    {
        delete _ptr;
        _ptr = ptr;
        ptr = nullptr;
    }
    void swap(Scopedptr<T> &sp)
    {
        swap(_ptr, sp._ptr);
    }
    ~Scopedptr()
    {
        if (_ptr)
        {
            delete _ptr;
        }
    }
private:
    Scopedptr(const Scopedptr<T> &sp);//加const是个好习惯
    Scopedptr<T>& operator=(const Scopedptr<T> &sp);
    T *_ptr;
};
void test()
{
    while (1)
    {
        int *ptr = new int[100*1024*1024];
        Scopedptr<int> sp1(ptr);
    }
}
int main()
{
    test();
    system("pause");
}
posted @ 2017-05-10 20:27  乐天的java  阅读(59)  评论(0)    收藏  举报