File: issue-76202-trait-impl-for-tait.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg2-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 893,176 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; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (45 lines) | stat: -rw-r--r-- 814 bytes parent folder | download | duplicates (4)
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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
// Regression test for issue #76202
// Tests that we don't ICE when we have a trait impl on a TAIT.

//@ revisions: current next
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[next] compile-flags: -Znext-solver
//@ check-pass
#![feature(type_alias_impl_trait)]

mod g {
    pub trait Dummy {}
    impl Dummy for () {}
    pub type F = impl Dummy;
    pub fn f() -> F {}
}
use g::*;

trait Test {
    fn test(self);
}

impl Test for define::F {
    fn test(self) {}
}

// Ok because `i32` does not implement `Dummy`,
// so it can't possibly be the hidden type of `F`.
impl Test for i32 {
    fn test(self) {}
}

mod define {
    use super::*;

    pub trait Dummy {}
    impl Dummy for () {}

    pub type F = impl Dummy;
    pub fn f() -> F {}
}

fn main() {
    let x = define::f();
    x.test();
}