Add TopicPartition::operator<

include/cppkafka/topic_partition.h

@@ -112,6 +112,11 @@ public:
      */
     void set_offset(int64_t offset);
 
+    /**
+     * Compare the (topic, partition) for less-than equality
+     */
+    bool operator<(const TopicPartition& rhs) const;
+
     /**
      * Print to a stream
      */