SmartPtrTA

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前言

初级智能指针的模板实现

实现

// SmartPtrTA.cpp : Defines the entry point for the console application.//#include "common.h"#include "SmartPtrTA.h"#include "A.h"void fnTest();int main(int argc, char* argv[]) {    fnTest();return 0;}void fnTest() {    CSmartPtrTA<CA> sp1;    CSmartPtrTA<CA> sp2;    sp1 = new CA();    sp2 = sp1;    sp2->foo();}

/// @file common.h/// @brief 公用头文件#ifndef COMMON_H_20160212#define COMMON_H_20160212#include <stdlib.h>#include <stdio.h>#include <tchar.h>#include <assert.h>#ifndef SAFE_DEL#define SAFE_DEL(x) \if (NULL != (x)) { \    delete (x); \    (x) = NULL; \}#endif // #ifndef SAFE_DEL(x)        #endif // #ifndef COMMON_H_20160212

/// @file SmartPtrTA.h/// @brief 初级智能指针的模板实现#ifndef SMARTPTRTA_H_20160212#define SMARTPTRTA_H_20160212template<typename T>class CSmartPtrTA {    public:        explicit CSmartPtrTA() {            m_pObj = NULL;        }        virtual ~CSmartPtrTA() {            SAFE_DEL(m_pObj);        }        // for sp = new CA();        /// 防止产生CSmartPtrTA临时对象        void operator =(T* pIn) {            SAFE_DEL(m_pObj);            m_pObj = pIn;        }        // for sp2 = sp1;        void operator =(CSmartPtrTA<T>& src) {            SAFE_DEL(m_pObj);            m_pObj = src.m_pObj;            src.m_pObj = NULL; ///< !        }        // sp2->foo();        T* operator ->() {            assert(NULL != m_pObj);            return m_pObj;        }    private:        T* m_pObj;};#endif // #ifndef SMARTPTRTA_H_20160212

// A.h: interface for the CA class.////////////////////////////////////////////////////////////////////////#if !defined(AFX_A_H__09B0C40A_9AE0_4694_B425_89C6087538CA__INCLUDED_)#define AFX_A_H__09B0C40A_9AE0_4694_B425_89C6087538CA__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000#include "common.h"class CA  {public:CA();virtual ~CA();    inline void foo() {        printf("CA::foo\n");    }};#endif // !defined(AFX_A_H__09B0C40A_9AE0_4694_B425_89C6087538CA__INCLUDED_)

// A.cpp: implementation of the CA class.////////////////////////////////////////////////////////////////////////#include "A.h"//////////////////////////////////////////////////////////////////////// Construction/Destruction//////////////////////////////////////////////////////////////////////CA::CA(){}CA::~CA(){}

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