File: unsize-good.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 (25 lines) | stat: -rw-r--r-- 438 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
 
//@ compile-flags: -Znext-solver
//@ check-pass

#![feature(unsized_tuple_coercion)]

trait Foo {}

impl Foo for i32 {}

fn main() {
    // Unsizing via struct
    let _: Box<dyn Foo> = Box::new(1i32);

    // Slice unsizing
    let y = [1, 2, 3];
    let _: &[i32] = &y;

    // Tuple unsizing
    let hi = (1i32,);
    let _: &(dyn Foo,) = &hi;

    // Dropping auto traits
    let a: &(dyn Foo + Send) = &1;
    let _: &dyn Foo = a;
}