| error[E0308]: mismatched types |
| --> $DIR/object-unsafe-trait-in-return-position-impl-trait.rs:36:5 |
| | |
| LL | fn can() -> impl NotObjectSafe { |
| | ------------------ expected because this return type... |
| LL | if true { |
| LL | return A; |
| | - ...is found to be `A` here |
| LL | } |
| LL | B |
| | ^ expected struct `A`, found struct `B` |
| | |
| = note: to return `impl Trait`, all returned values must be of the same type |
| = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits> |
| = help: if the trait `NotObjectSafe` were object safe, you could return a boxed trait object |
| = note: for information on trait objects, see <https://doc.rust-lang.org/book/ch17-02-trait-objects.html#using-trait-objects-that-allow-for-values-of-different-types> |
| = help: alternatively, create a new `enum` with a variant for each returned type |
| |
| error[E0308]: mismatched types |
| --> $DIR/object-unsafe-trait-in-return-position-impl-trait.rs:43:5 |
| | |
| LL | fn cat() -> impl ObjectSafe { |
| | --------------- expected because this return type... |
| LL | if true { |
| LL | return A; |
| | - ...is found to be `A` here |
| LL | } |
| LL | B |
| | ^ expected struct `A`, found struct `B` |
| | |
| = note: to return `impl Trait`, all returned values must be of the same type |
| = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits> |
| = help: you can instead return a boxed trait object using `Box<dyn ObjectSafe>` |
| = note: for information on trait objects, see <https://doc.rust-lang.org/book/ch17-02-trait-objects.html#using-trait-objects-that-allow-for-values-of-different-types> |
| = help: alternatively, create a new `enum` with a variant for each returned type |
| |
| error: aborting due to 2 previous errors |
| |
| For more information about this error, try `rustc --explain E0308`. |
