Thread: Friends in a template class

Hi,

I was just curious to see how I would implement a friend function in template class. It was purely as an excercise, as I have never really found a use for it in real life. Anyway, I came up with the following code. This works fine in MSVC 2003. However it doesn't compile in g++.

You get the error:

main.cpp:13: declaration of `class T'
main.cpp:5: shadows template parm `class T'

Does anyone know which one is correct?

Code:

#include <iostream>

using namespace std;

template <typename T>
class CFoo
{
private:
	T val;

public:
	CFoo(T d) : val(d) { }
	template<typename T>
	friend ostream & operator<<(ostream & os, const CFoo<T> & cf);
};

template <typename T>
ostream & operator<<(ostream & os, const CFoo<T> & cf)
{
	os << cf.val << endl;

	return os;
}


int main()
{
	CFoo<int> foo(10);

	cout << foo << endl;
	cin.get();
}

Heh - how do you like that.

Cheers