(多继承+模板回传子类)的结构所遇到的问题

（一）问题初现

（1）问题代码

在调试一个项目时，发生崩溃，通过调用堆栈看是访问成员变量时发生的，代码结构如下

class BaseA
{
public:
BaseA() { cout << "new BaseA " << endl; }
virtual ~BaseA() {};
int m_aa;
};

template< typename T>
class BaseB
{
public:
BaseB(){cout << "new BasBe " << endl;}
virtual ~BaseB(){}

void Test()
{
Func(this);
}
private:
void Func(void* pObj)
{
T* pThis = (T*)(pObj);
pThis->Run();
}
int m_bb;
};

class Drive:  public BaseA, public BaseB<Drive>
{
public:
Drive()
{
m_cc = 5;
cout << "new Drive " << endl;
}
virtual ~Drive(){ }

void Run(bool bl=true)
{
cout << "m_cc = " << m_cc << endl;
}

int m_cc;
};

（2）调用方法

Drive* pDrive = new Drive();
pDrive->Test();

（二）问题研究

（1࿰