File: issue-63677-type-alias-coherence.rs

package info (click to toggle)
rustc-web 1.70.0%2Bdfsg1-7~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,517,036 kB
  • sloc: xml: 147,962; javascript: 10,210; sh: 8,590; python: 8,220; ansic: 5,901; cpp: 4,635; makefile: 4,006; asm: 2,856
file content (21 lines) | stat: -rw-r--r-- 417 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
// check-pass
// Regression test for issue #63677 - ensure that
// coherence checking can properly handle 'impl trait'
// in type aliases
#![feature(type_alias_impl_trait)]

pub trait Trait {}
pub struct S1<T>(T);
pub struct S2<T>(T);

pub type T1 = impl Trait;
pub type T2 = S1<T1>;
pub type T3 = S2<T2>;

impl<T> Trait for S1<T> {}
impl<T: Trait> S2<T> {}
impl T3 {}

pub fn use_t1() -> T1 { S1(()) }

fn main() {}