File: mut-ref-reborrow.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, forky, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (25 lines) | stat: -rw-r--r-- 479 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
 
//@ aux-build:block-on.rs
//@ run-pass
//@ check-run-results
//@ revisions: e2021 e2018
//@[e2018] edition:2018
//@[e2021] edition:2021

extern crate block_on;

async fn call_once(f: impl AsyncFnOnce()) { f().await; }

pub async fn async_closure(x: &mut i32) {
    let c = async move || {
        *x += 1;
    };
    call_once(c).await;
}

fn main() {
    block_on::block_on(async {
        let mut x = 0;
        async_closure(&mut x).await;
        assert_eq!(x, 1);
    });
}