20 lines
339 B
Rust
20 lines
339 B
Rust
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// edition:2018
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// check-pass
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#![feature(unboxed_closures)]
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use std::future::Future;
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async fn wrapper<F>(f: F)
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where for<'a> F: FnOnce<(&'a mut i32,)>,
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for<'a> <F as FnOnce<(&'a mut i32,)>>::Output: Future<Output=()> + 'a
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{
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let mut i = 41;
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f(&mut i).await;
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}
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async fn add_one(i: &mut i32) {
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*i = *i + 1;
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}
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fn main() {}
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