File: ref-underscore.rs

package info (click to toggle)
rustc 1.87.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 925,564 kB
  • sloc: xml: 158,127; python: 36,039; javascript: 19,761; sh: 19,737; cpp: 18,981; ansic: 13,133; asm: 4,376; makefile: 710; perl: 29; lisp: 28; ruby: 19; sql: 11
file content (30 lines) | stat: -rw-r--r-- 471 bytes parent folder | download | duplicates (16) 
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 `impl MyTrait for &i32` works and is equivalent to any lifetime.

//@ run-pass

#![allow(warnings)]

trait MyTrait { }

impl MyTrait for &i32 {
}

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> &'a i32: MyTrait { }

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

    impls_my_trait_val(f);

    impls_my_trait::<&'static i32>();

    random_where_clause();
}