mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-30 02:33:55 +00:00
5fce361d58
When encountering
```rust
fn g(mut x: impl Iterator<Item = &()>) -> Option<&()> { /* */ }
```
Suggest
```rust
fn g<'a>(mut x: impl Iterator<Item = &'a ()>) -> Option<&'a ()> { /* */ }
```
209 lines
9.8 KiB
Plaintext
209 lines
9.8 KiB
Plaintext
error[E0106]: missing lifetime specifier
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--> $DIR/impl-trait-missing-lifetime-gated.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`
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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: ...or alternatively, to 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-gated.rs:19:60
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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`
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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: ...or alternatively, to 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[E0106]: missing lifetime specifier
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--> $DIR/impl-trait-missing-lifetime-gated.rs:27:58
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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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error[E0106]: missing lifetime specifier
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--> $DIR/impl-trait-missing-lifetime-gated.rs:37:64
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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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error[E0106]: missing lifetime specifier
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--> $DIR/impl-trait-missing-lifetime-gated.rs:47:37
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LL | fn g(mut x: impl Foo) -> 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`
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LL | fn g(mut x: impl Foo) -> 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 Foo) -> Option<&'a ()> { x.next() }
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| ++++ ~~~
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help: ...or alternatively, to want to return an owned value
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LL - fn g(mut x: impl Foo) -> Option<&()> { x.next() }
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LL + fn g(mut x: impl Foo) -> Option<()> { x.next() }
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error[E0106]: missing lifetime specifier
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--> $DIR/impl-trait-missing-lifetime-gated.rs:58:41
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LL | fn g(mut x: impl Foo<()>) -> 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`
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LL | fn g(mut x: impl Foo<()>) -> 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 Foo<()>) -> Option<&'a ()> { x.next() }
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| ++++ ~~~
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help: ...or alternatively, to want to return an owned value
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LL - fn g(mut x: impl Foo<()>) -> Option<&()> { x.next() }
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LL + fn g(mut x: impl Foo<()>) -> Option<()> { x.next() }
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:6:35
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LL | fn f(_: impl Iterator<Item = &()>) {}
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| ^ expected named lifetime parameter
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= help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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help: consider introducing a named lifetime parameter
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LL | fn f<'a>(_: impl Iterator<Item = &'a ()>) {}
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| ++++ ++
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:9:39
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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: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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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<&()> { x.next() }
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| ++++ ++
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:24:35
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LL | fn f(_: impl Iterator<Item = &'_ ()>) {}
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| ^^ expected named lifetime parameter
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= help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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help: consider introducing a named lifetime parameter
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LL | fn f<'a>(_: impl Iterator<Item = &'a ()>) {}
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| ++++ ~~
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:27:39
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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: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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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<&'_ ()> { x.next() }
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| ++++ ~~
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:44:18
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LL | fn f(_: impl Foo) {}
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| ^^^ expected named lifetime parameter
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= help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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help: consider introducing a named lifetime parameter
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LL | fn f<'a>(_: impl Foo<'a>) {}
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| ++++ ++++
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:47:22
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LL | fn g(mut x: impl Foo) -> Option<&()> { x.next() }
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| ^^^ expected named lifetime parameter
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= help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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help: consider introducing a named lifetime parameter
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LL | fn g<'a>(mut x: impl Foo<'a>) -> Option<&()> { x.next() }
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| ++++ ++++
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:55:22
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LL | fn f(_: impl Foo<()>) {}
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| ^ expected named lifetime parameter
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= help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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help: consider introducing a named lifetime parameter
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LL | fn f<'a>(_: impl Foo<'a, ()>) {}
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| ++++ +++
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error[E0658]: anonymous lifetimes in `impl Trait` are unstable
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--> $DIR/impl-trait-missing-lifetime-gated.rs:58:26
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LL | fn g(mut x: impl Foo<()>) -> Option<&()> { x.next() }
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| ^ expected named lifetime parameter
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= help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
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help: consider introducing a named lifetime parameter
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LL | fn g<'a>(mut x: impl Foo<'a, ()>) -> Option<&()> { x.next() }
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| ++++ +++
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error: aborting due to 14 previous errors
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Some errors have detailed explanations: E0106, E0658.
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For more information about an error, try `rustc --explain E0106`.
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