60 lines
2.4 KiB
Text
60 lines
2.4 KiB
Text
error[E0378]: the trait `DispatchFromDyn` may only be implemented for structs containing the field being coerced, ZST fields with 1 byte alignment that don't mention type/const generics, and nothing else
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--> $DIR/invalid_dispatch_from_dyn_impls.rs:10:1
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LL | / impl<T, U> DispatchFromDyn<WrapperWithExtraField<U>> for WrapperWithExtraField<T>
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LL | |
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LL | | where
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LL | | T: DispatchFromDyn<U>,
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| |__________________________^
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= note: extra field `1` of type `i32` is not allowed
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error[E0375]: implementing `DispatchFromDyn` does not allow multiple fields to be coerced
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--> $DIR/invalid_dispatch_from_dyn_impls.rs:22:1
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LL | / impl<T: ?Sized, U: ?Sized> DispatchFromDyn<MultiplePointers<U>> for MultiplePointers<T>
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LL | |
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LL | | where
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LL | | T: Unsize<U>,
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| |_________________^
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note: the trait `DispatchFromDyn` may only be implemented when a single field is being coerced
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--> $DIR/invalid_dispatch_from_dyn_impls.rs:18:5
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LL | ptr1: *const T,
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| ^^^^^^^^^^^^^^
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LL | ptr2: *const T,
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| ^^^^^^^^^^^^^^
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error[E0374]: implementing `DispatchFromDyn` requires a field to be coerced
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--> $DIR/invalid_dispatch_from_dyn_impls.rs:33:1
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LL | impl<T: ?Sized, U: ?Sized> DispatchFromDyn<NothingToCoerce<T>> for NothingToCoerce<U> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected a single field to be coerced, none found
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error[E0378]: structs implementing `DispatchFromDyn` may not have `#[repr(packed)]` or `#[repr(C)]`
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--> $DIR/invalid_dispatch_from_dyn_impls.rs:39:1
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LL | / impl<T: ?Sized, U: ?Sized> DispatchFromDyn<HasReprC<U>> for HasReprC<T>
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LL | |
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LL | | where
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LL | | T: Unsize<U>,
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| |_________________^
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error[E0378]: the trait `DispatchFromDyn` may only be implemented for structs containing the field being coerced, ZST fields with 1 byte alignment that don't mention type/const generics, and nothing else
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--> $DIR/invalid_dispatch_from_dyn_impls.rs:49:1
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LL | / impl<T: ?Sized, U: ?Sized> DispatchFromDyn<OverAligned<U>> for OverAligned<T>
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LL | |
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LL | | where
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LL | | T: Unsize<U>,
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| |_____________________^
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= note: extra field `1` of type `OverAlignedZst` is not allowed
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0374, E0375, E0378.
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For more information about an error, try `rustc --explain E0374`.
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