File: indirect-recursion-issue-112047.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb12u3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,245,420 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (29 lines) | stat: -rw-r--r-- 489 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
//@ edition: 2021
//@ build-fail

#![feature(impl_trait_in_assoc_type)]

use core::future::Future;

trait Recur {
    type Recur: Future<Output = ()>;

    fn recur(self) -> Self::Recur;
}

async fn recur(t: impl Recur) {
    t.recur().await;
}

impl Recur for () {
    type Recur = impl Future<Output = ()>;

    fn recur(self) -> Self::Recur {
        async move { recur(self).await; }
        //~^ ERROR recursion in an async block requires boxing
    }
}

fn main() {
    recur(());
}