mirror of https://github.com/rust-lang/rust
44 lines
1.6 KiB
Plaintext
44 lines
1.6 KiB
Plaintext
error[E0308]: mismatched types
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--> $DIR/dyn-impl-type-mismatch.rs:11:9
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LL | fn foo() -> impl Trait {
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| ---------- the found opaque type
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...
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LL | foo()
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| ^^^^^ expected `Box<dyn Trait>`, found opaque type
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= note: expected struct `Box<dyn Trait>`
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found opaque type `impl Trait`
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= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
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help: store this in the heap by calling `Box::new`
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LL | Box::new(foo())
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| +++++++++ +
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error[E0308]: mismatched types
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--> $DIR/dyn-impl-type-mismatch.rs:14:9
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LL | Struct
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| ^^^^^^ expected `dyn Trait`, found `Struct`
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= note: expected trait object `dyn Trait`
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found struct `Struct`
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= help: `Struct` implements `Trait` so you could box the found value and coerce it to the trait object `Box<dyn Trait>`, you will have to change the expected type as well
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error[E0308]: mismatched types
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--> $DIR/dyn-impl-type-mismatch.rs:16:9
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LL | fn foo() -> impl Trait {
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| ---------- the found opaque type
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...
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LL | foo()
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| ^^^^^ expected `dyn Trait`, found opaque type
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= note: expected trait object `dyn Trait`
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found opaque type `impl Trait`
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= help: you can box the `impl Trait` to coerce it to `Box<dyn Trait>`, but you'll have to change the expected type as well
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0308`.
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