54 lines
2.8 KiB
Plaintext
54 lines
2.8 KiB
Plaintext
error[E0106]: missing lifetime specifier
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--> $DIR/impl-trait-missing-lifetime.rs:9:54
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LL | fn g(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
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| ^^ expected named lifetime parameter
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= help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
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help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`, or if you will only have owned values
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LL | fn g(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'static ()> { x.next() }
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| ~~~~~~~
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help: consider introducing a named lifetime parameter
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LL | fn g<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'a ()> { x.next() }
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| ++++ ~~~ ~~~
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help: alternatively, you might want to return an owned value
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LL - fn g(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
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LL + fn g(mut x: impl Iterator<Item = &'_ ()>) -> Option<()> { x.next() }
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error[E0106]: missing lifetime specifier
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--> $DIR/impl-trait-missing-lifetime.rs:16:60
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LL | async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
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| ^^ expected named lifetime parameter
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= help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
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help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`, or if you will only have owned values
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LL | async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'static ()> { x.next() }
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| ~~~~~~~
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help: consider introducing a named lifetime parameter
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LL | async fn i<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'a ()> { x.next() }
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| ++++ ~~~ ~~~
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help: alternatively, you might want to return an owned value
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LL - async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
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LL + async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<()> { x.next() }
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error: lifetime may not live long enough
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--> $DIR/impl-trait-missing-lifetime.rs:16:69
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LL | async fn i(mut x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
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| ----------------------------------------------------------------- ^^^^^^^^ returning this value requires that `'1` must outlive `'static`
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| |
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| return type `impl Future<Output = Option<&'static ()>>` contains a lifetime `'1`
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0106`.
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