R6025纯虚函数调用：什么是如何解决 [英] R6025 Pure virtual function call: What is and how to resolve

问题描述

回答可以在这里找到：

有效C ++的摘录，第三版，Scott Meyers

发布的网址： hmjd

请阅读该页面，以便了解为什么会发生。你也知道为什么要替换

Please read that page so you understand why it is happening. Also you know why substituting

        virtual void     OnRelease() = 0;

由：

        virtual void     OnRelease(){};

会工作，但不是正确的解决方法。

will work but isn't the correct way to resolve.

原始问题

R6025：纯虚函数调用

R6025: pure virtual function call

#include <Windows.h>

// static lib
    //file.h
    class cBaseApplication
    {
    public:
        virtual          ~cBaseApplication(){ Release(); }
        virtual void     Release()
                         {

                             OnRelease();

                         };
        virtual void     OnRelease() = 0;
    }; // class cBaseApplication

    //file1.h
    class cApplication : public cBaseApplication
    {
    public:
        virtual void     OnRelease()
                         {

                             /* what the heck do something here */

                         };
    }; // class cApplication

// executable
    // file3.h
    int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow )
    {

        cApplication* pApplication = new cApplication();

        /*...what the heck, do stuff...*/

        pApplication->Release();
        delete pApplication;      // R6025: pure virtual function call
        pApplication = NULL;

        return 0;

    }

在行

delete pApplication; 

R6025发生，当删除时，所有精细但内存泄漏发生。
当cApplication应用程序将被销毁时，删除指针引用R6025也会在程序退出上发生。

R6025 occurs and when removing, all fine but memory leaks occur. Removing the pointer reference the R6025 will happen too on 'program exit' when cApplication application will be destruct.

由于嘟嘟声，R6025吓唬我：

Due to the beep, the R6025 scares me :s

似乎我必须在两者之间选择，但我只是不想要，这里发生了什么？

As it seems I have to choose between the two but I just don't want to, what is happening here?

注意，
约翰

编辑：添加了一些代码，似乎Eran是正确的，因为我在那里调用虚函数

Added some code, seems Eran is right as I do call virtual functions there

编辑：添加到示例，[virtual void OnLostDevice（）= 0; ]。从抽象到替代提供了一个立即的解决方案。在下面的评论中开始阅读该页面，因为我得到的感觉我还没有。

Added to example, [ virtual void OnLostDevice() = 0; ]. Changing from abstract to ascoop gave an immediate solution. Starting to read that page in the comments below as I got the feeling I ain't there yet.

编辑：在我得到答案后，我明白我自己的问题。

After I got the answer I understood my own problem. So I rewrote the question, so the answer fits the question.

感谢，John

推荐答案

您不能在析构函数中的构造函数和中调用虚函数。我在这里没有看到一个纯虚函数，但如果 cBaseApplication :: Release 偶然调用一个，你会得到这个错误每次你毁了一个 cBaseApplication 。我不确定是这个问题，因为我没有所有的代码，但你的代码调用这种问题。

You must not call virtual functions in constructors and in destructors. I don't see a pure virtual function here, but if cBaseApplication::Release happen to call one, you'll get that error every time you destruct a cBaseApplication. I'm not sure that's the issue because I don't have all the code, but your code calls for that kind of issues.

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