diff options
Diffstat (limited to 'src/test/ui/invalid_dispatch_from_dyn_impls.stderr')
| -rw-r--r-- | src/test/ui/invalid_dispatch_from_dyn_impls.stderr | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/test/ui/invalid_dispatch_from_dyn_impls.stderr b/src/test/ui/invalid_dispatch_from_dyn_impls.stderr new file mode 100644 index 000000000..b5b32d2f0 --- /dev/null +++ b/src/test/ui/invalid_dispatch_from_dyn_impls.stderr @@ -0,0 +1,40 @@ +error[E0378]: the trait `DispatchFromDyn` may only be implemented for structs containing the field being coerced, ZST fields with 1 byte alignment, and nothing else + --> $DIR/invalid_dispatch_from_dyn_impls.rs:10:1 + | +LL | impl<T, U> DispatchFromDyn<WrapperWithExtraField<U>> for WrapperWithExtraField<T> + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = 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:21:1 + | +LL | impl<T: ?Sized, U: ?Sized> DispatchFromDyn<MultiplePointers<U>> for MultiplePointers<T> + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = 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:31:1 + | +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:37:1 + | +LL | impl<T: ?Sized, U: ?Sized> DispatchFromDyn<HasReprC<U>> for HasReprC<T> + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error[E0378]: the trait `DispatchFromDyn` may only be implemented for structs containing the field being coerced, ZST fields with 1 byte alignment, and nothing else + --> $DIR/invalid_dispatch_from_dyn_impls.rs:46:1 + | +LL | impl<T: ?Sized, U: ?Sized> DispatchFromDyn<OverAligned<U>> for OverAligned<T> + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: extra field `1` of type `OverAlignedZst` is not allowed + +error: aborting due to 5 previous errors + +For more information about this error, try `rustc --explain E0378`. |