template <class T, class Container>
bool operator==(const queue<T, Container>& x, const queue<T, Container>& y);
template <class T, class Container>
bool operator!=(const queue<T, Container>& x, const queue<T, Container>& y);
template <class T, class Container>
bool operator< (const queue<T, Container>& x, const queue<T, Container>& y);
template <class T, class Container>
bool operator<=(const queue<T, Container>& x, const queue<T, Container>& y);
template <class T, class Container>
bool operator> (const queue<T, Container>& x, const queue<T, Container>& y);
template <class T, class Container>
bool operator>=(const queue<T, Container>& x,
const queue<T, Container>& y);