31 lines
633 B
Rust
31 lines
633 B
Rust
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// Test that existential types are allowed to contain late-bound regions.
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// compile-pass
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// edition:2018
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#![feature(async_await, existential_type)]
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use std::future::Future;
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pub existential type Func: Sized;
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// Late bound region should be allowed to escape the function, since it's bound
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// in the type.
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fn null_function_ptr() -> Func {
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None::<for<'a> fn(&'a ())>
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}
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async fn async_nop(_: &u8) {}
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pub existential type ServeFut: Future<Output=()>;
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// Late bound regions occur in the generator witness type here.
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fn serve() -> ServeFut {
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async move {
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let x = 5;
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async_nop(&x).await
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}
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}
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fn main() {}
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