Template troubles II

Greetings, everyone, and don't laugh at me for being a poor novice programmer :)
I'm trying to implement a (very specific) Database class, and I think it'd be nice to be able use some of the generic algorithms on it, like find. So here's my code (stripped to the barest minimum which won't compile):

Code:

---

#include <vector>

using namespace std;

template<class Type>
class Database {
private:
        vector<Type> _data;

public:
        vector<Type>::iterator begin()  {
                return _data.begin();
        }

        vector<Type>::iterator end() {
                return _data.end();
        }
};

---

The compiler says things like 'std::vector<_Ty>::iterator' : dependent name is not a type prefix with 'typename' to indicate a type. Obviously, it has a grudge against me for something.
Or does anyone think otherwise? :)

listen to your compiler

Code:

---

template<class Type>
class Database {
private:
        vector<Type> _data;

public:
        typename vector<Type>::iterator begin()  {
                return _data.begin();
        }

        typename vector<Type>::iterator end() {
                return _data.end();
        }
};

---

Why you need typename?
Because without it it thinks iterator is a static member of class vector<Type> and not a type in its own right.

you need to add the 'typename' qualifier when referencing a typedef external to a template.

Code:

---

        typename vector<Type>::iterator begin()  {
                return _data.begin();
        }

---

an easier way is to define the typedef for your template:

Code:

---

template<class Type>
class Database {
private:
        vector<Type> _data;
  typedef typename vector<Type>::iterator iterator;

public:
        iterator begin()  {
                return _data.begin();
        }

        iterator end() {
                return _data.end();
        }
};

---