ObjFW  Diff

 * @brief Returns the earlier of the two dates.
 *
 * If the argument is `nil`, it returns the receiver.
 *
 * @param otherDate Another date
 * @return The earlier date of the two dates
 */
- (OFDate *)earlierDate: (OFDate *)otherDate;
- (OFDate *)earlierDate: (nullable OFDate *)otherDate;

/*!
 * @brief Returns the later of the two dates.
 *
 * If the argument is `nil`, it returns the receiver.
 *
 * @param otherDate Another date
 * @return The later date of the two dates
 */
- (OFDate *)laterDate: (OFDate *)otherDate;
- (OFDate *)laterDate: (nullable OFDate *)otherDate;

/*!
 * @brief Returns the seconds since 1970-01-01T00:00:00Z.
 *
 * @return The seconds since 1970-01-01T00:00:00Z
 */
- (of_time_interval_t)timeIntervalSince1970;