File: issue-11552.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 (24 lines) | stat: -rw-r--r-- 455 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
 
//@ run-pass
#![feature(box_patterns)]

#[derive(Clone)]
enum Noun
{
    Atom(isize),
    Cell(Box<Noun>, Box<Noun>)
}

fn fas(n: &Noun) -> Noun
{
    match n {
        &Noun::Cell(box Noun::Atom(2), box Noun::Cell(ref a, _)) => (**a).clone(),
        _ => panic!("Invalid fas pattern")
    }
}

pub fn main() {
    fas(
        &Noun::Cell(Box::new(Noun::Atom(2)),
        Box::new(Noun::Cell(Box::new(Noun::Atom(2)), Box::new(Noun::Atom(3)))))
    );
}