File: borrowed-ptr-pattern-option.rs

package info (click to toggle)
rustc-web 1.70.0%2Bdfsg1-7~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,517,036 kB
  • sloc: xml: 147,962; javascript: 10,210; sh: 8,590; python: 8,220; ansic: 5,901; cpp: 4,635; makefile: 4,006; asm: 2,856
file content (15 lines) | stat: -rw-r--r-- 311 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 
// run-pass

fn select<'r>(x: &'r Option<isize>, y: &'r Option<isize>) -> &'r Option<isize> {
    match (x, y) {
        (&None, &None) => x,
        (&Some(_), _) => x,
        (&None, &Some(_)) => y
    }
}

pub fn main() {
    let x = None;
    let y = Some(3);
    assert_eq!(select(&x, &y).unwrap(), 3);
}