File: assoc-types.rs

package info (click to toggle)
rustc 1.88.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 934,128 kB
  • sloc: xml: 158,127; python: 36,062; javascript: 19,855; sh: 19,700; cpp: 18,947; ansic: 12,993; asm: 4,792; makefile: 690; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (23 lines) | stat: -rw-r--r-- 389 bytes parent folder | download | duplicates (16) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
//@ edition: 2021
//@ revisions: rpitit assoc_ty

#![deny(unused_must_use)]

use std::future::Future;

pub trait Tr {
    type Fut: Future<Output = ()>;

    #[cfg(rpitit)]
    fn foo() -> impl Future<Output = ()>;

    #[cfg(assoc_ty)]
    fn foo() -> Self::Fut;
}

pub async fn bar<T: Tr>() {
    T::foo();
    //~^ ERROR unused implementer of `Future` that must be used
}

fn main() {}