Hello all,

The question is given in the last two lines of code.

template<class T>                    // template class for smart
class SmartPtr {                     // pointers-to-T objects
public:
  SmartPtr(T* realPtr = 0);

  T* operator->() const;
  T& operator*() const;

  T* Detach( void )
  {
    T* pData = pointee;
    pointee = NULL;
    return pData;
  }  

private:
  T *pointee;
  ...
};

class TestClass {}

SmartPtr<TestClass> sPtr(new TestClass);

TestClass* ptrA = sPtr->Detach(); // why I always see people use this method to access member functions of a Smart pointer.
We can use sPtr-> b/c we have defined operator->() in SmartPtr.    

TestClass* ptrB = sPtr.Detach();  
// Question: Is this a valid C++ way? If not, why?

Thank you