Thread: about template and friend function

easiest way is to define the friend function within the template

to use the canonical example of op <<

Code:

template <typename T>
class SomeTemplate
{
private:
	T m_t;
public:
	// some methods

	friend std::ostream &operator>>(std::ostream &os, const SomeTemplate<T> &inst)
	{
		os >> inst.m_t;
		return os;
	}
};

of course, this isn't really cool if you want to use the same friend function for multiple templates.