擷取成員函數地址的方法

關於通過成員函數指標來獲得成員函數地址的方法確實比較困難。它的困痛點在於必須繞過C++編譯器的類型檢查。像VC對成員函數指標類型檢查的很嚴，即使是void*類型都不能轉，也無法通過reinterpret_cast、dynamic_cast之類的來轉。
因此我這裡將採取暴力手段來擷取：

#include <iostream>
using namespace std;

class Test
{
public:

void Hello(void)
{
cout << "Hello, world!" << endl;
}

void Hello(int i)
{
cout << "The answer is: " << i << endl;
}
};

template <typename T>
inline unsigned GetMemberFuncAddress(T p)
{
unsigned result;

__asm
{
mov eax, dword ptr [p]
mov dword ptr [result], eax
}

return result;
}

int main(void)
{
void (Test::* p)(void) = &Test::Hello;
void (Test::* q)(int) = &Test::Hello;

(Test().*p)();
(Test().*q)(100);

cout << "The address is: " << p << endl;
cout << "The address is: " << q << endl;

cout << "The address is: 0x" << hex << GetMemberFuncAddress(p) << endl;
cout << "The address is: 0x" << hex << GetMemberFuncAddress(q) << endl;

return 0;
}