File: wf-unsafe-trait-obj-match.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb11u3
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,245,360 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 (29 lines) | stat: -rw-r--r-- 476 bytes parent folder | download | duplicates (11) 
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
 
// Check that we do not allow coercions to object
// unsafe trait objects in match arms

#![feature(object_safe_for_dispatch)]

trait Trait: Sized {}

struct S;

impl Trait for S {}

struct R;

impl Trait for R {}

fn opt() -> Option<()> {
    Some(())
}

fn main() {
    match opt() {
        Some(()) => &S,
        None => &R,  //~ ERROR E0308
    }
    let t: &dyn Trait = match opt() { //~ ERROR E0038
        Some(()) => &S, //~ ERROR E0038
        None => &R,
    };
}