270     friend void swap( concurrent_queue& lhs, concurrent_queue& rhs ) {  in swap()  argument
271         lhs.swap(rhs);  in swap()
274     friend bool operator==( const concurrent_queue& lhs, const concurrent_queue& rhs ) {
275 …return lhs.unsafe_size() == rhs.unsafe_size() && std::equal(lhs.unsafe_begin(), lhs.unsafe_end(), …
279     friend bool operator!=( const concurrent_queue& lhs,  const concurrent_queue& rhs ) {
280         return !(lhs == rhs);
664     friend void swap( concurrent_bounded_queue& lhs, concurrent_bounded_queue& rhs ) {  in swap()  argument
665         lhs.swap(rhs);  in swap()
668 …riend bool operator==( const concurrent_bounded_queue& lhs, const concurrent_bounded_queue& rhs ) {
669 …return lhs.size() == rhs.size() && std::equal(lhs.unsafe_begin(), lhs.unsafe_end(), rhs.unsafe_beg…
673 …riend bool operator!=( const concurrent_bounded_queue& lhs, const concurrent_bounded_queue& rhs ) {
674         return !(lhs == rhs);