| #### Note: this error code is no longer emitted by the compiler. |
| This error code was replaced by `E0539`. |
| |
| A unrecognized representation attribute was used. |
| |
| Erroneous code example: |
| |
| ```compile_fail |
| #[repr(D)] // error: unrecognized representation hint |
| struct MyStruct { |
| my_field: usize |
| } |
| ``` |
| |
| You can use a `repr` attribute to tell the compiler how you want a struct or |
| enum to be laid out in memory. |
| |
| Make sure you're using one of the supported options: |
| |
| ``` |
| #[repr(C)] // ok! |
| struct MyStruct { |
| my_field: usize |
| } |
| ``` |
| |
| For more information about specifying representations, see the ["Alternative |
| Representations" section] of the Rustonomicon. |
| |
| ["Alternative Representations" section]: https://doc.rust-lang.org/nomicon/other-reprs.html |
