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