f4e311e871
This change introduces a specialization of fmt::formatter for cql3::expr::oper_t. This enables the usage of this type with FMTv10, which dropped the default generated formatter. Usage of cql3::expr::oper_t without the defined formatter resulted in compilation error when compiled with FMTv10. Refs: #13245 Signed-off-by: Patryk Wrobel <patryk.wrobel@scylladb.com> Closes scylladb/scylladb#16719