File: gat-in-trait-path.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb12u3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,245,420 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (35 lines) | stat: -rw-r--r-- 732 bytes parent folder | download | duplicates (2)
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
//@ revisions: base extended
//@[base] check-fail
//@[extended] check-pass

#![feature(associated_type_defaults)]
#![cfg_attr(extended, feature(generic_associated_types_extended))]
#![cfg_attr(extended, allow(incomplete_features))]

trait Foo {
    type A<'a> where Self: 'a;
}

struct Fooy;

impl Foo for Fooy {
    type A<'a> = &'a ();
}

#[derive(Clone)]
struct Fooer<T>(T);

impl<T> Foo for Fooer<T> {
    type A<'x> = &'x () where T: 'x;
}

fn f(_arg : Box<dyn for<'a> Foo<A<'a> = &'a ()>>) {}
//[base]~^ the trait `Foo` cannot be made into an object


fn main() {
  let foo = Fooer(5);
  f(Box::new(foo));
  //[base]~^ the trait `Foo` cannot be made into an object
  //[base]~| the trait `Foo` cannot be made into an object
}