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40 lines
1.7 KiB
Plaintext
40 lines
1.7 KiB
Plaintext
warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
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--> $DIR/specialization-default-types.rs:5:12
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LL | #![feature(specialization)]
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| ^^^^^^^^^^^^^^
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= note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
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= help: consider using `min_specialization` instead, which is more stable and complete
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= note: `#[warn(incomplete_features)]` on by default
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error[E0308]: mismatched types
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--> $DIR/specialization-default-types.rs:15:9
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LL | default type Output = Box<T>;
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| ----------------------------- associated type is `default` and may be overridden
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LL | default fn generate(self) -> Self::Output {
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| ------------ expected `<T as Example>::Output` because of return type
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LL | Box::new(self)
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| ^^^^^^^^^^^^^^ expected associated type, found `Box<T>`
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= note: expected associated type `<T as Example>::Output`
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found struct `Box<T>`
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error[E0308]: mismatched types
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--> $DIR/specialization-default-types.rs:25:5
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LL | fn trouble<T>(t: T) -> Box<T> {
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| ------ expected `Box<T>` because of return type
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LL | Example::generate(t)
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| ^^^^^^^^^^^^^^^^^^^^ expected `Box<T>`, found associated type
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= note: expected struct `Box<T>`
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found associated type `<T as Example>::Output`
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= help: consider constraining the associated type `<T as Example>::Output` to `Box<T>`
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= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
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error: aborting due to 2 previous errors; 1 warning emitted
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For more information about this error, try `rustc --explain E0308`.
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