template <class T> 
struct A 
{
  A& operator=(const A&) {return *this; }
};

template <class T> 
struct B : A<T> 
{
  B(const A& a) : A<T>(a)  {}
  B& operator=(const B& b) {A<T>::operator=(b); return *this; }
};


int main()
{
  return 0;
}

// The code is compiled correctly if I replace line 10 with
// B(const A<T>& a) : A<T>(a)  {}