error[E0539]: malformed `repr` attribute input
  --> $DIR/repr.rs:1:1
   |
LL | #[repr]
   | ^^^^^^^ expected this to be a list
   |
   = note: for more information, visit <https://doc.rust-lang.org/reference/type-layout.html#representations>
help: try changing it to one of the following valid forms of the attribute
   |
LL | #[repr(<integer type>)]
   |       ++++++++++++++++
LL | #[repr(C)]
   |       +++
LL | #[repr(Rust)]
   |       ++++++
LL | #[repr(align(...))]
   |       ++++++++++++
   = and 2 other candidates

error[E0539]: malformed `repr` attribute input
  --> $DIR/repr.rs:4:1
   |
LL | #[repr = "B"]
   | ^^^^^^^^^^^^^ expected this to be a list
   |
   = note: for more information, visit <https://doc.rust-lang.org/reference/type-layout.html#representations>
help: try changing it to one of the following valid forms of the attribute
   |
LL - #[repr = "B"]
LL + #[repr(<integer type>)]
   |
LL - #[repr = "B"]
LL + #[repr(C)]
   |
LL - #[repr = "B"]
LL + #[repr(Rust)]
   |
LL - #[repr = "B"]
LL + #[repr(align(...))]
   |
   = and 2 other candidates

error[E0539]: malformed `repr` attribute input
  --> $DIR/repr.rs:7:1
   |
LL | #[repr = "C"]
   | ^^^^^^^^^^^^^ expected this to be a list
   |
   = note: for more information, visit <https://doc.rust-lang.org/reference/type-layout.html#representations>
help: try changing it to one of the following valid forms of the attribute
   |
LL - #[repr = "C"]
LL + #[repr(<integer type>)]
   |
LL - #[repr = "C"]
LL + #[repr(C)]
   |
LL - #[repr = "C"]
LL + #[repr(Rust)]
   |
LL - #[repr = "C"]
LL + #[repr(align(...))]
   |
   = and 2 other candidates

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0539`.