File: issue-72793.rs

package info (click to toggle)
rustc 1.87.0%2Bdfsg1-1~bpo13%2B2
  • links: PTS, VCS
  • area: main
  • in suites: trixie-backports
  • size: 925,560 kB
  • sloc: xml: 158,127; python: 36,039; javascript: 19,761; sh: 19,737; cpp: 18,981; ansic: 13,133; asm: 4,376; makefile: 710; perl: 29; lisp: 28; ruby: 19; sql: 11
file content (27 lines) | stat: -rw-r--r-- 446 bytes parent folder | download | duplicates (9) 
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
 
// Adapted from rustc ui test suite (ui/type-alias-impl-trait/issue-72793.rs)

#![feature(type_alias_impl_trait)]

pub trait T {
    type Item;
}

pub type Alias<'a> = impl T<Item = &'a ()>;

struct S;
impl<'a> T for &'a S {
    type Item = &'a ();
}

#[define_opaque(Alias)]
pub fn filter_positive<'a>() -> Alias<'a> {
    &S
}

fn with_positive(fun: impl Fn(Alias<'_>)) {
    fun(filter_positive());
}

fn main() {
    with_positive(|_| ());
}