| error[E0038]: the trait `Foo` cannot be made into an object |
| --> $DIR/gat-in-trait-path.rs:26:17 |
| | |
| LL | fn f(_arg : Box<dyn for<'a> Foo<A<'a> = &'a ()>>) {} |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `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/gat-in-trait-path.rs:10:10 |
| | |
| LL | trait Foo { |
| | --- this trait cannot be made into an object... |
| LL | type A<'a> where Self: 'a; |
| | ^ ...because it contains the generic associated type `A` |
| = help: consider moving `A` to another trait |
| = help: the following types implement the trait, consider defining an enum where each variant holds one of these types, implementing `Foo` for this new enum and using it instead: |
| Fooy |
| Fooer<T> |
| |
| error: aborting due to previous error |
| |
| For more information about this error, try `rustc --explain E0038`. |
