Thread: 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?

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(); 
	}
};