获得成员函数地址

#include <Windows.h>

#include <stdio.h>

template <typename ToType, typename FromType>
void GetMemberFuncAddr_VC6(ToType& addr,FromType f)
{
    union
    {
        FromType _f;
        ToType   _t;
    }ut;
    ut._f = f;
    addr = ut._t;
}

class A
{
        
public: 

    int m_data;

public:

    virtual void f(){printf("hello world\n");}
};


int main()
{

    
    DWORD dwAddr = 0;
    GetMemberFuncAddr_VC6(dwAddr, &A::f);


    A a;
    printf("dwAddr = %p\n", dwAddr);
    printf("&A::f() = %p\n", &A::f);

    return 0;
}