22 lines
826 B
Rust
22 lines
826 B
Rust
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// edition:2021
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// gate-test-anonymous_lifetime_in_impl_trait
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// Verify the behaviour of `feature(anonymous_lifetime_in_impl_trait)`.
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fn f(_: impl Iterator<Item = &'_ ()>) {}
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//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
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fn g(x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
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//~^ ERROR anonymous lifetimes in `impl Trait` are unstable
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//~| ERROR missing lifetime specifier
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// Anonymous lifetimes in async fn are already allowed.
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// This is understood as `fn foo<'_1>(_: impl Iterator<Item = &'_1 ()>) {}`.
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async fn h(_: impl Iterator<Item = &'_ ()>) {}
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// Anonymous lifetimes in async fn are already allowed.
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// But that lifetime does not participate in resolution.
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async fn i(x: impl Iterator<Item = &'_ ()>) -> Option<&'_ ()> { x.next() }
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//~^ ERROR missing lifetime specifier
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fn main() {}
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