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error[E0308]: mismatched types
--> $DIR/dyn-impl-type-mismatch.rs:11:9
|
LL | fn foo() -> impl Trait {
| ---------- the found opaque type
...
LL | foo()
| ^^^^^ expected `Box<dyn Trait>`, found opaque type
|
= note: expected struct `Box<dyn Trait>`
found opaque type `impl Trait`
= 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
help: store this in the heap by calling `Box::new`
|
LL | Box::new(foo())
| +++++++++ +
error[E0308]: mismatched types
--> $DIR/dyn-impl-type-mismatch.rs:14:9
|
LL | Struct
| ^^^^^^ expected `dyn Trait`, found `Struct`
|
= note: expected trait object `dyn Trait`
found struct `Struct`
= 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
error[E0308]: mismatched types
--> $DIR/dyn-impl-type-mismatch.rs:16:9
|
LL | fn foo() -> impl Trait {
| ---------- the found opaque type
...
LL | foo()
| ^^^^^ expected `dyn Trait`, found opaque type
|
= note: expected trait object `dyn Trait`
found opaque type `impl Trait`
= 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
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0308`.
|
