[VC6]std::vector派生类无法调用std::vector的解决方法

[VC6]std::vector派生类无法调用std::vector的解决方法
template<class _Ty, class _A = std::allocator<_Ty> >
class CTestVector : public std::vector<_Ty,_A >
{
 public:
  void clear()
  {
   std::vector<_Ty,_A >::clear();
  }
};

CTestVector<int> vv;
 vv.clear();

'std::vector<int,class std::allocator<int> >::clear' : illegal call of non-static member function

template<class _Ty, class _A = std::allocator<_Ty> >
class CTestVector : public std::vector<_Ty,_A >
{
 typedef std::vector<_Ty,_A > PARENT;

void clear()
  {
   PARENT::clear();
  }
};