error: `Row` can only be derived for structs
 --> tests/ui/row_forbidden.rs:2:6
  |
2 | enum Enum {
  |      ^^^^

error: `Row` can only be derived for structs
 --> tests/ui/row_forbidden.rs:8:7
  |
8 | union Union {
  |       ^^^^^

error: `Row` cannot be derived for unit or empty structs
  --> tests/ui/row_forbidden.rs:14:12
   |
14 | pub struct UnitStruct;
   |            ^^^^^^^^^^

error: `Row` cannot be derived for unit or empty structs
  --> tests/ui/row_forbidden.rs:17:12
   |
17 | pub struct EmptyStruct {}
   |            ^^^^^^^^^^^
