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
53
54
55
56
57
58
59
60
61
62
|
use self::Direction::{North, East, South, West};
#[derive(PartialEq, Eq)]
struct NewBool(bool);
#[derive(PartialEq, Eq)]
enum Direction {
North,
East,
South,
West
}
const TRUE_TRUE: (bool, bool) = (true, true);
fn nonexhaustive_1() {
match (true, false) {
//~^ ERROR non-exhaustive patterns: `(true, false)` not covered
TRUE_TRUE => (),
(false, false) => (),
(false, true) => ()
}
}
const NONE: Option<Direction> = None;
const EAST: Direction = East;
fn nonexhaustive_2() {
match Some(Some(North)) {
//~^ ERROR non-exhaustive patterns: `Some(Some(Direction::West))` not covered
Some(NONE) => (),
Some(Some(North)) => (),
Some(Some(EAST)) => (),
Some(Some(South)) => (),
None => ()
}
}
const NEW_FALSE: NewBool = NewBool(false);
struct Foo {
bar: Option<Direction>,
baz: NewBool
}
const STATIC_FOO: Foo = Foo { bar: None, baz: NEW_FALSE };
fn nonexhaustive_3() {
match (Foo { bar: Some(North), baz: NewBool(true) }) {
//~^ ERROR non-exhaustive patterns: `Foo { bar: Some(Direction::North), baz: NewBool(true) }`
Foo { bar: None, baz: NewBool(true) } => (),
Foo { bar: _, baz: NEW_FALSE } => (),
Foo { bar: Some(West), baz: NewBool(true) } => (),
Foo { bar: Some(South), .. } => (),
Foo { bar: Some(EAST), .. } => ()
}
}
fn main() {
nonexhaustive_1();
nonexhaustive_2();
nonexhaustive_3();
}
|
