error: macro requires attribute `unit_enum`.
= help: Add attribute like `unit_enum(UnitEnumName)`
--> tests/macros/unit_enum_no_unit.rs:3:10
|
3 | #[derive(UnitEnum)]
| ^^^^^^^^
|
= note: this error originates in the derive macro `UnitEnum` (in Nightly builds, run with -Z macro-backtrace for more info)