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|
error[E0782]: expected a type, found a trait
--> $DIR/ice-return-unsized-can-impl-2.rs:11:20
|
LL | fn concrete(b: B) -> B;
| ^
|
= note: `B` it is dyn-incompatible, so it can't be `dyn`
help: use a new generic type parameter, constrained by `B`
|
LL | fn concrete<T: B>(b: T) -> B;
| ++++++ ~
help: you can also use an opaque type, but users won't be able to specify the type parameter when calling the `fn`, having to rely exclusively on type inference
|
LL | fn concrete(b: impl B) -> B;
| ++++
error[E0782]: expected a type, found a trait
--> $DIR/ice-return-unsized-can-impl-2.rs:11:26
|
LL | fn concrete(b: B) -> B;
| ^
|
help: `B` is dyn-incompatible, use `impl B` to return an opaque type, as long as you return a single underlying type
|
LL | fn concrete(b: B) -> impl B;
| ++++
error[E0782]: expected a type, found a trait
--> $DIR/ice-return-unsized-can-impl-2.rs:6:13
|
LL | fn f(a: A) -> A;
| ^
|
= note: `A` it is dyn-incompatible, so it can't be `dyn`
help: use a new generic type parameter, constrained by `A`
|
LL | fn f<T: A>(a: T) -> A;
| ++++++ ~
help: you can also use an opaque type, but users won't be able to specify the type parameter when calling the `fn`, having to rely exclusively on type inference
|
LL | fn f(a: impl A) -> A;
| ++++
error[E0782]: expected a type, found a trait
--> $DIR/ice-return-unsized-can-impl-2.rs:6:19
|
LL | fn f(a: A) -> A;
| ^
|
help: `A` is dyn-incompatible, use `impl A` to return an opaque type, as long as you return a single underlying type
|
LL | fn f(a: A) -> impl A;
| ++++
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0782`.
|
