error: expected `:`, found `,` --> $DIR/invalid_type_enum.rs:5:6 | 5 | A, | ^ expected `:` error: proc-macro derive panicked --> $DIR/invalid_type_enum.rs:3:10 | 3 | #[derive(StructConf)] | ^^^^^^^^^^ | = help: message: called `Result::unwrap()` on an `Err` value: Error("expected `:`")