| 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`. |