mirror of https://github.com/rust-lang/rust
28 lines
368 B
Rust
28 lines
368 B
Rust
//@ edition: 2021
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use std::future::Future;
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async fn bop() {
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fold(run(), |mut foo| async move {
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&mut foo.bar;
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})
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}
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fn fold<Fut, F, U>(_: Foo<U>, f: F)
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where
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F: FnMut(Foo<U>) -> Fut,
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{
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loop {}
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}
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struct Foo<F> {
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bar: Vec<F>,
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}
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fn run() -> Foo<impl Future<Output = ()>> {
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//~^ ERROR type annotations needed
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loop {}
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}
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fn main() {}
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