| error[E0378]: the trait `DispatchFromDyn` may only be implemented for structs containing the field being coerced, `PhantomData` fields, and nothing else |
| --> $DIR/invalid_dispatch_from_dyn_impls.rs:20:1 |
| | |
| LL | / impl<T, U> DispatchFromDyn<WrapperWithExtraField<U>> for WrapperWithExtraField<T> |
| LL | | where |
| LL | | T: DispatchFromDyn<U>, |
| LL | | {} //~^^^ ERROR [E0378] |
| | |__^ |
| | |
| = note: extra field `1` of type `i32` is not allowed |
| |
| error[E0378]: implementing the `DispatchFromDyn` trait requires multiple coercions |
| --> $DIR/invalid_dispatch_from_dyn_impls.rs:31:1 |
| | |
| LL | / impl<T: ?Sized, U: ?Sized> DispatchFromDyn<MultiplePointers<U>> for MultiplePointers<T> |
| LL | | where |
| LL | | T: Unsize<U>, |
| LL | | {} //~^^^ ERROR [E0378] |
| | |__^ |
| | |
| = note: the trait `DispatchFromDyn` may only be implemented for a coercion between structures with a single field being coerced |
| = note: currently, 2 fields need coercions: `ptr1` (`*const T` to `*const U`), `ptr2` (`*const T` to `*const U`) |
| |
| error[E0378]: the trait `DispatchFromDyn` may only be implemented for a coercion between structures with a single field being coerced, none found |
| --> $DIR/invalid_dispatch_from_dyn_impls.rs:41:1 |
| | |
| LL | impl<T: ?Sized, U: ?Sized> DispatchFromDyn<NothingToCoerce<T>> for NothingToCoerce<U> {} |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| error[E0378]: structs implementing `DispatchFromDyn` may not have `#[repr(packed)]` or `#[repr(C)]` |
| --> $DIR/invalid_dispatch_from_dyn_impls.rs:47:1 |
| | |
| LL | / impl<T: ?Sized, U: ?Sized> DispatchFromDyn<HasReprC<U>> for HasReprC<T> |
| LL | | where |
| LL | | T: Unsize<U>, |
| LL | | {} //~^^^ ERROR [E0378] |
| | |__^ |
| |
| error: aborting due to 4 previous errors |
| |
| For more information about this error, try `rustc --explain E0378`. |