= other.bits_per_sec_;   }   constexpr bool operator<=(const DataRate& other) const {     return bits_per_sec_ <= other.bits_per_sec_;   }   constexpr bool operator>=(const DataRate& other) const {     return bits_per_sec_ >= other.bits_per_sec_;   }   constexpr bool operator>(const DataRate& other) const {     return bits_per_sec_ > other.bits_per_sec_;   }   constexpr bool operator<(const DataRate& other) const {     return bits_per_sec_ <