File: path-underscore.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 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; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (34 lines) | stat: -rw-r--r-- 606 bytes parent folder | download | duplicates (5)
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
// Test that `impl MyTrait for Foo<'_>` works.

//@ run-pass

#![allow(warnings)]

trait MyTrait { }

struct Foo<'a> { x: &'a u32 }

impl MyTrait for Foo<'_> {
}

fn impls_my_trait<T: MyTrait>() { }

fn impls_my_trait_val<T: MyTrait>(_: T) {
    impls_my_trait::<T>();
}

fn random_where_clause()
where for<'a> Foo<'a>: MyTrait { }

fn main() {
    let x = 22;
    let f = Foo { x: &x };

    // This type is `Foo<'x>` for a local lifetime `'x`; so the impl
    // must apply to any lifetime to apply to this.
    impls_my_trait_val(f);

    impls_my_trait::<Foo<'static>>();

    random_where_clause();
}