namespace test {
   template <typename T> class A;
}

template <class T>
bool operator==(const T *lhs, const test::A<T> &rhs);

namespace test {

template <typename T>
class A {
public:
	friend bool ::operator==(const T *lhs, const test::A<T> &rhs);
};

}

int main(void)
{
}