File: dyn-trait-elided-two-inputs-ref-assoc.rs

package info (click to toggle)
rustc 1.86.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, forky, sid
  • size: 913,560 kB
  • sloc: xml: 158,127; python: 35,921; javascript: 19,689; sh: 19,600; cpp: 18,906; ansic: 13,124; asm: 4,376; makefile: 708; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (30 lines) | stat: -rw-r--r-- 689 bytes parent folder | download | duplicates (6)
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
// Test that we don't get an error with `dyn Bar` in an impl Trait
// when there are multiple inputs.  The `dyn Bar` should default to `+
// 'static`. This used to erroneously generate an error (cc #62517).
//
//@ revisions: current next
//@[next] compile-flags: -Znext-solver
//@ ignore-compare-mode-next-solver (explicit revisions)
//@ check-pass

trait Foo {
    type Item: ?Sized;

    fn item(&self) -> Box<Self::Item> { panic!() }
}

trait Bar { }

impl<T> Foo for T {
    type Item = dyn Bar;
}

fn is_static<T>(_: T) where T: 'static { }

fn bar(x: &str) -> &impl Foo<Item = dyn Bar> { &() }

fn main() {
    let s = format!("foo");
    let r = bar(&s);
    is_static(r.item());
}