assert class pointer

在類函數中判斷當前對象是否有效.

#ifdef _DEBUG
#include <windows.h>
#define ASSERT_READ assert(!::IsBadReadPtr(this, sizeof(*this)));
#define ASSERT_WRITE assert(!::IsBadWritePtr(this, sizeof(*this)));
#else
#define ASSERT_READ 
#define ASSERT_WRITE 
#endif



void CClass::testNullPointer(int n)
{
	ASSERT_READ;
	//ASSERT_WRITE;
	//...
}