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When encountering a type mismatch error involving `dyn Trait`, mention the existence of boxed trait objects if the other type involved implements `Trait`. Partially addresses #102629.
26 lines
1021 B
Plaintext
26 lines
1021 B
Plaintext
error[E0308]: mismatched types
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--> $DIR/dst-bad-assign-3.rs:33:12
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LL | f5.2 = Bar1 {f: 36};
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| ---- ^^^^^^^^^^^^ expected `dyn ToBar`, found `Bar1`
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| expected due to the type of this binding
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= note: expected trait object `dyn ToBar`
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found struct `Bar1`
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= help: `Bar1` implements `ToBar` so you could box the found value and coerce it to the trait object `Box<dyn ToBar>`, you will have to change the expected type as well
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error[E0277]: the size for values of type `dyn ToBar` cannot be known at compilation time
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--> $DIR/dst-bad-assign-3.rs:33:5
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LL | f5.2 = Bar1 {f: 36};
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| ^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `dyn ToBar`
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= note: the left-hand-side of an assignment must have a statically known size
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error: aborting due to 2 previous errors
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Some errors have detailed explanations: E0277, E0308.
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For more information about an error, try `rustc --explain E0277`.
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