23 lines
438 B
Rust
23 lines
438 B
Rust
|
#![feature(slice_patterns)]
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
let mut x: &[_] = &[1, 2, 3, 4];
|
||
|
|
|
||
|
|
let mut result = vec!();
|
||
|
|
loop {
|
||
|
|
x = match *x {
|
||
|
|
[1, n, 3, ref rest..] => {
|
||
|
|
result.push(n);
|
||
|
|
rest
|
||
|
|
}
|
||
|
|
[n, ref rest..] => {
|
||
|
|
result.push(n);
|
||
|
|
rest
|
||
|
|
}
|
||
|
|
[] =>
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
assert_eq!(result, [2, 4]);
|
||
|
|
}
|