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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// Test basic or-patterns when the target pattern type will be lowered to
// a `SwitchInt`. This will happen when the target type is an integer.
// run-pass
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug)]
enum Foo {
One(usize),
Two(usize, usize),
}
fn test_foo(x: Foo) -> MatchArm {
match x {
// normal pattern.
Foo::One(0) | Foo::One(1) | Foo::One(2) => MatchArm::Arm(0),
// most simple or-pattern.
Foo::One(42 | 255) => MatchArm::Arm(1),
// multiple or-patterns for one structure.
Foo::Two(42 | 255, 1024 | 2048) => MatchArm::Arm(2),
// mix of pattern types in one or-pattern (range).
Foo::One(100 | 110..=120 | 210..=220) => MatchArm::Arm(3),
// multiple or-patterns with wild.
Foo::Two(0..=10 | 100..=110, 0 | _) => MatchArm::Arm(4),
// wild
_ => MatchArm::Wild,
}
}
fn main() {
// `Foo` tests.
assert_eq!(test_foo(Foo::One(0)), MatchArm::Arm(0));
assert_eq!(test_foo(Foo::One(42)), MatchArm::Arm(1));
assert_eq!(test_foo(Foo::One(43)), MatchArm::Wild);
assert_eq!(test_foo(Foo::One(255)), MatchArm::Arm(1));
assert_eq!(test_foo(Foo::One(256)), MatchArm::Wild);
assert_eq!(test_foo(Foo::Two(42, 1023)), MatchArm::Wild);
assert_eq!(test_foo(Foo::Two(255, 2048)), MatchArm::Arm(2));
assert_eq!(test_foo(Foo::One(100)), MatchArm::Arm(3));
assert_eq!(test_foo(Foo::One(115)), MatchArm::Arm(3));
assert_eq!(test_foo(Foo::One(105)), MatchArm::Wild);
assert_eq!(test_foo(Foo::One(215)), MatchArm::Arm(3));
assert_eq!(test_foo(Foo::One(121)), MatchArm::Wild);
assert_eq!(test_foo(Foo::Two(0, 42)), MatchArm::Arm(4));
assert_eq!(test_foo(Foo::Two(100, 0)), MatchArm::Arm(4));
assert_eq!(test_foo(Foo::Two(42, 0)), MatchArm::Wild);
}
|
