File: never-result.rs

package info (click to toggle)
rustc 1.88.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 934,128 kB
  • sloc: xml: 158,127; python: 36,062; javascript: 19,855; sh: 19,700; cpp: 18,947; ansic: 12,993; asm: 4,792; makefile: 690; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (20 lines) | stat: -rw-r--r-- 447 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
//@ run-pass

#![allow(unused_variables)]
#![allow(unreachable_code)]
#![allow(unreachable_patterns)]
// Test that we can extract a ! through pattern matching then use it as several different types.
#![feature(never_type)]

fn main() {
    let x: Result<u32, !> = Ok(123);
    match x {
        Ok(z) => (),
        Err(y) => {
            let q: u32 = y;
            let w: i32 = y;
            let e: String = y;
            y
        }
    }
}