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
30
31
32
33
34
35
36
|
// Test or-patterns with box-patterns
// run-pass
#![feature(box_patterns)]
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug)]
enum Test {
Foo,
Bar,
Baz,
Qux,
}
fn test(x: Option<Box<Test>>) -> MatchArm {
match x {
Some(box Test::Foo | box Test::Bar) => MatchArm::Arm(0),
Some(box Test::Baz) => MatchArm::Arm(1),
Some(_) => MatchArm::Arm(2),
_ => MatchArm::Wild,
}
}
fn main() {
assert_eq!(test(Some(Box::new(Test::Foo))), MatchArm::Arm(0));
assert_eq!(test(Some(Box::new(Test::Bar))), MatchArm::Arm(0));
assert_eq!(test(Some(Box::new(Test::Baz))), MatchArm::Arm(1));
assert_eq!(test(Some(Box::new(Test::Qux))), MatchArm::Arm(2));
assert_eq!(test(None), MatchArm::Wild);
}
|
