相关疑难解决方法(0)

我一直认为内部类可以访问其外部类中的所有数据,但具有代码:

template<class T>
class Vector
{
 template<class T>
 friend
std::ostream& operator<<(std::ostream& out, const Vector<T>& obj);
private:
 T** myData_;
 std::size_t myIndex_;
 std::size_t mySize_;
public: 
 Vector():myData_(nullptr),
  myIndex_(0),
  mySize_(0)
 { }
 Vector(const Vector<T>& pattern);
 void insert(const T&);
 Vector<T> makeUnion(const Vector<T>&)const;
 Vector<T> makeIntersection(const Vector<T>&)const;
 class Iterator : public std::iterator<std::bidirectional_iterator_tag,T>
 {
 private:
  T** itData_;
 public:
  Iterator()//<<<<<<<<<<<<<------------COMMENT
  { /*HERE I'M TRYING TO USE ANY MEMBER FROM Vector<T> AND I'M GETTING ERR SAYING:
   ILLEGAL CALL OF NON-STATIC MEMBER FUNCTION*/}

  Iterator(T** ty)
  { 
   itData_ = ty;
  }

  Iterator …