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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
error: unreachable pattern
--> $DIR/empty-match-check-notes.rs:17:9
|
LL | _ => {}
| ^------
| |
| matches no values because `EmptyEnum` is uninhabited
| help: remove the match arm
|
= note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
note: the lint level is defined here
--> $DIR/empty-match-check-notes.rs:7:9
|
LL | #![deny(unreachable_patterns)]
| ^^^^^^^^^^^^^^^^^^^^
error: unreachable pattern
--> $DIR/empty-match-check-notes.rs:22:9
|
LL | _ if false => {}
| ^---------------
| |
| matches no values because `EmptyEnum` is uninhabited
| help: remove the match arm
|
= note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
error: unreachable pattern
--> $DIR/empty-match-check-notes.rs:31:9
|
LL | _ => {}
| ^------
| |
| matches no values because `EmptyForeignEnum` is uninhabited
| help: remove the match arm
|
= note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
error: unreachable pattern
--> $DIR/empty-match-check-notes.rs:36:9
|
LL | _ if false => {}
| ^---------------
| |
| matches no values because `EmptyForeignEnum` is uninhabited
| help: remove the match arm
|
= note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
error[E0005]: refutable pattern in local binding
--> $DIR/empty-match-check-notes.rs:43:9
|
LL | let None = *x;
| ^^^^ pattern `Some(_)` not covered
|
= note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
= note: for more information, visit https://doc.rust-lang.org/book/ch19-02-refutability.html
= note: pattern `Some(_)` is currently uninhabited, but this variant contains private fields which may become inhabited in the future
= note: the matched value is of type `Option<SecretlyUninhabitedForeignStruct>`
help: you might want to use `if let` to ignore the variant that isn't matched
|
LL | if let None = *x { todo!() };
| ++ +++++++++++
error[E0004]: non-exhaustive patterns: `0_u8..=u8::MAX` not covered
--> $DIR/empty-match-check-notes.rs:53:11
|
LL | match 0u8 {
| ^^^ pattern `0_u8..=u8::MAX` not covered
|
= note: the matched value is of type `u8`
= note: match arms with guards don't count towards exhaustivity
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
|
LL ~ _ if false => {},
LL + 0_u8..=u8::MAX => todo!()
|
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0004, E0005.
For more information about an error, try `rustc --explain E0004`.
|
