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error[E0038]: the trait `StreamingIterator` cannot be made into an object
--> $DIR/trait-objects.rs:8:21
|
LL | fn min_size(x: &mut dyn for<'a> StreamingIterator<Item<'a> = &'a i32>) -> usize {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `StreamingIterator` 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/trait-objects.rs:2:10
|
LL | trait StreamingIterator {
| ----------------- this trait cannot be made into an object...
LL | type Item<'a> where Self: 'a;
| ^^^^ ...because it contains the generic associated type `Item`
= help: consider moving `Item` to another trait
error[E0038]: the trait `StreamingIterator` cannot be made into an object
--> $DIR/trait-objects.rs:10:7
|
LL | x.size_hint().0
| ^^^^^^^^^ `StreamingIterator` 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/trait-objects.rs:2:10
|
LL | trait StreamingIterator {
| ----------------- this trait cannot be made into an object...
LL | type Item<'a> where Self: 'a;
| ^^^^ ...because it contains the generic associated type `Item`
= help: consider moving `Item` to another trait
error[E0038]: the trait `StreamingIterator` cannot be made into an object
--> $DIR/trait-objects.rs:10:5
|
LL | x.size_hint().0
| ^^^^^^^^^^^^^ `StreamingIterator` 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/trait-objects.rs:2:10
|
LL | trait StreamingIterator {
| ----------------- this trait cannot be made into an object...
LL | type Item<'a> where Self: 'a;
| ^^^^ ...because it contains the generic associated type `Item`
= help: consider moving `Item` to another trait
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0038`.
|
