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error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/almost-supertrait-associated-type.rs:21:20
|
LL | impl<T, U> Dyn for dyn Foo<T, U> + '_ {
| ^^^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object
|
note: for a trait to be "dyn-compatible" 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/almost-supertrait-associated-type.rs:33:34
|
LL | trait Foo<T, U>: Super<ActuallySuper, Assoc = T>
| --- this trait cannot be made into an object...
...
LL | fn transmute(&self, t: T) -> <Self as Super<NotActuallySuper>>::Assoc;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...because method `transmute` references the `Self` type in its return type
= help: consider moving `transmute` to another trait
= help: only type `std::marker::PhantomData<T>` implements the trait, consider using it directly instead
error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/almost-supertrait-associated-type.rs:7:27
|
LL | (&PhantomData::<T> as &dyn Foo<T, U>).transmute(t)
| ^^^^^^^^^^^^^^ `Foo` cannot be made into an object
|
note: for a trait to be "dyn-compatible" 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/almost-supertrait-associated-type.rs:33:34
|
LL | trait Foo<T, U>: Super<ActuallySuper, Assoc = T>
| --- this trait cannot be made into an object...
...
LL | fn transmute(&self, t: T) -> <Self as Super<NotActuallySuper>>::Assoc;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...because method `transmute` references the `Self` type in its return type
= help: consider moving `transmute` to another trait
= help: only type `std::marker::PhantomData<T>` implements the trait, consider using it directly instead
error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/almost-supertrait-associated-type.rs:7:6
|
LL | (&PhantomData::<T> as &dyn Foo<T, U>).transmute(t)
| ^^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object
|
note: for a trait to be "dyn-compatible" 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/almost-supertrait-associated-type.rs:33:34
|
LL | trait Foo<T, U>: Super<ActuallySuper, Assoc = T>
| --- this trait cannot be made into an object...
...
LL | fn transmute(&self, t: T) -> <Self as Super<NotActuallySuper>>::Assoc;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...because method `transmute` references the `Self` type in its return type
= help: consider moving `transmute` to another trait
= help: only type `std::marker::PhantomData<T>` implements the trait, consider using it directly instead
= note: required for the cast from `&PhantomData<T>` to `&dyn Foo<T, U>`
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0038`.
|
