| error[E0038]: the trait `NotObjectSafe` cannot be made into an object |
| --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:21:13 |
| | |
| LL | fn car() -> dyn NotObjectSafe { |
| | ^^^^^^^^^^^^^^^^^ `NotObjectSafe` cannot be made into an object |
| | |
| note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> |
| --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:3:8 |
| | |
| LL | trait NotObjectSafe { |
| | ------------- this trait cannot be made into an object... |
| LL | fn foo() -> Self; |
| | ^^^ ...because associated function `foo` has no `self` parameter |
| help: consider turning `foo` into a method by giving it a `&self` argument |
| | |
| LL | fn foo(&self) -> Self; |
| | ^^^^^ |
| help: alternatively, consider constraining `foo` so it does not apply to trait objects |
| | |
| LL | fn foo() -> Self where Self: Sized; |
| | ^^^^^^^^^^^^^^^^^ |
| |
| error[E0038]: the trait `NotObjectSafe` cannot be made into an object |
| --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:28:13 |
| | |
| LL | fn cat() -> Box<dyn NotObjectSafe> { |
| | ^^^^^^^^^^^^^^^^^^^^^^ `NotObjectSafe` cannot be made into an object |
| | |
| note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> |
| --> $DIR/object-unsafe-trait-in-return-position-dyn-trait.rs:3:8 |
| | |
| LL | trait NotObjectSafe { |
| | ------------- this trait cannot be made into an object... |
| LL | fn foo() -> Self; |
| | ^^^ ...because associated function `foo` has no `self` parameter |
| help: consider turning `foo` into a method by giving it a `&self` argument |
| | |
| LL | fn foo(&self) -> Self; |
| | ^^^^^ |
| help: alternatively, consider constraining `foo` so it does not apply to trait objects |
| | |
| LL | fn foo() -> Self where Self: Sized; |
| | ^^^^^^^^^^^^^^^^^ |
| |
| error: aborting due to 2 previous errors |
| |
| For more information about this error, try `rustc --explain E0038`. |
