mirror of https://github.com/rust-lang/rust
31 lines
621 B
Rust
31 lines
621 B
Rust
// Test that opaque `impl Trait` types are allowed to contain late-bound regions.
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//@ check-pass
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//@ edition:2018
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#![feature(type_alias_impl_trait)]
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use std::future::Future;
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pub type Func = impl 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 type ServeFut = impl Future<Output=()>;
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// Late bound regions occur in the coroutine 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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