mirror of https://github.com/rust-lang/rust
49 lines
2.4 KiB
Plaintext
49 lines
2.4 KiB
Plaintext
error[E0038]: the trait `StreamingIterator` cannot be made into an object
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--> $DIR/trait-objects.rs:13:21
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LL | fn min_size(x: &mut dyn for<'a> StreamingIterator<Item<'a> = &'a i32>) -> usize {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `StreamingIterator` cannot be made into an object
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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>
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--> $DIR/trait-objects.rs:7:10
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LL | trait StreamingIterator {
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| ----------------- this trait cannot be made into an object...
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LL | type Item<'a> where Self: 'a;
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| ^^^^ ...because it contains the generic associated type `Item`
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= help: consider moving `Item` to another trait
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error[E0038]: the trait `StreamingIterator` cannot be made into an object
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--> $DIR/trait-objects.rs:15:7
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LL | x.size_hint().0
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| ^^^^^^^^^ `StreamingIterator` cannot be made into an object
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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>
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--> $DIR/trait-objects.rs:7:10
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LL | trait StreamingIterator {
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| ----------------- this trait cannot be made into an object...
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LL | type Item<'a> where Self: 'a;
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| ^^^^ ...because it contains the generic associated type `Item`
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= help: consider moving `Item` to another trait
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error[E0038]: the trait `StreamingIterator` cannot be made into an object
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--> $DIR/trait-objects.rs:15:5
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LL | x.size_hint().0
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| ^^^^^^^^^^^^^ `StreamingIterator` cannot be made into an object
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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>
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--> $DIR/trait-objects.rs:7:10
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LL | trait StreamingIterator {
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| ----------------- this trait cannot be made into an object...
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LL | type Item<'a> where Self: 'a;
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| ^^^^ ...because it contains the generic associated type `Item`
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= help: consider moving `Item` to another trait
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0038`.
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