rust/tests/ui/impl-trait/in-trait/foreign-dyn-error.stderr

error[E0038]: the trait `Foo` cannot be made into an object
  --> $DIR/foreign-dyn-error.rs:6:12
   |
LL |     let _: &dyn rpitit::Foo = todo!();
   |            ^^^^^^^^^^^^^^^^ `Foo` 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/auxiliary/rpitit.rs:6:21
   |
LL |     fn bar(self) -> impl Deref<Target = impl Sized>;
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait cannot be made into an object because method `bar` references an `impl Trait` type in its return type
   = help: only type `rpitit::Foreign` implements the trait, consider using it directly instead

error: aborting due to previous error

For more information about this error, try `rustc --explain E0038`.
Encode def span for foreign RPITITs 2023-04-30 16:52:35 -05:00			error[E0038]: the trait `Foo` cannot be made into an object
			`--> $DIR/foreign-dyn-error.rs:6:12`
			`\|`
			`LL \| let _: &dyn rpitit::Foo = todo!();`
			\| ^^^^^^^^^^^^^^^^ `Foo` 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>`
Replace RPITIT current impl with new strategy that lowers as a GAT 2023-06-23 22:00:08 -05:00			`--> $DIR/auxiliary/rpitit.rs:6:21`
Encode def span for foreign RPITITs 2023-04-30 16:52:35 -05:00			`\|`
			`LL \| fn bar(self) -> impl Deref<Target = impl Sized>;`
			\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait cannot be made into an object because method `bar` references an `impl Trait` type in its return type
On object safety error, mention new enum as alternative When we encounter a `dyn Trait` that isn't object safe, look for its implementors. If there's one, mention using it directly If there are less than 9, mention the possibility of creating a new enum and using that instead. Account for object unsafe `impl Trait on dyn Trait {}`. Make a distinction between public and sealed traits. Fix #80194. 2023-10-24 11:45:04 -05:00			= help: only type `rpitit::Foreign` implements the trait, consider using it directly instead
Encode def span for foreign RPITITs 2023-04-30 16:52:35 -05:00
			`error: aborting due to previous error`

			For more information about this error, try `rustc --explain E0038`.