error[E0517]: attribute should be applied to struct, enum, or union --> $DIR/attr-usage-repr.rs:3:8 | LL | #[repr(C)] | ^ LL | fn f() {} | --------- not a struct, enum, or union error[E0517]: attribute should be applied to enum --> $DIR/attr-usage-repr.rs:15:8 | LL | #[repr(i8)] | ^^ LL | struct SInt(f64, f64); | ---------------------- not an enum error[E0517]: attribute should be applied to struct or union --> $DIR/attr-usage-repr.rs:24:8 | LL | #[repr(packed)] | ^^^^^^ LL | enum EPacked { A, B } | --------------------- not a struct or union error[E0517]: attribute should be applied to struct --> $DIR/attr-usage-repr.rs:27:8 | LL | #[repr(simd)] | ^^^^ LL | enum ESimd { A, B } | ------------------- not a struct error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0517`.