| error[E0038]: the trait `A` is not dyn compatible |
| --> $DIR/dyn-incompatible-trait-should-use-self-2021.rs:4:13 |
| | |
| LL | fn f(a: dyn A) -> dyn A; |
| | ^^^^^ `A` is not dyn compatible |
| | |
| note: for a trait to be dyn compatible it needs to allow building a vtable |
| for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility> |
| --> $DIR/dyn-incompatible-trait-should-use-self-2021.rs:3:10 |
| | |
| LL | trait A: Sized { |
| | - ^^^^^ ...because it requires `Self: Sized` |
| | | |
| | this trait is not dyn compatible... |
| help: you might have meant to use `Self` to refer to the implementing type |
| | |
| LL - fn f(a: dyn A) -> dyn A; |
| LL + fn f(a: Self) -> dyn A; |
| | |
| |
| error[E0038]: the trait `B` is not dyn compatible |
| --> $DIR/dyn-incompatible-trait-should-use-self-2021.rs:8:13 |
| | |
| LL | fn f(a: dyn B) -> dyn B; |
| | ^^^^^ `B` is not dyn compatible |
| | |
| note: for a trait to be dyn compatible it needs to allow building a vtable |
| for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility> |
| --> $DIR/dyn-incompatible-trait-should-use-self-2021.rs:8:8 |
| | |
| LL | trait B { |
| | - this trait is not dyn compatible... |
| LL | fn f(a: dyn B) -> dyn B; |
| | ^ ...because associated function `f` has no `self` parameter |
| help: consider turning `f` into a method by giving it a `&self` argument |
| | |
| LL | fn f(&self, a: dyn B) -> dyn B; |
| | ++++++ |
| help: alternatively, consider constraining `f` so it does not apply to trait objects |
| | |
| LL | fn f(a: dyn B) -> dyn B where Self: Sized; |
| | +++++++++++++++++ |
| help: you might have meant to use `Self` to refer to the implementing type |
| | |
| LL - fn f(a: dyn B) -> dyn B; |
| LL + fn f(a: Self) -> dyn B; |
| | |
| |
| error: aborting due to 2 previous errors |
| |
| For more information about this error, try `rustc --explain E0038`. |
