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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
error: unexpected parentheses surrounding `match` arm pattern
--> $DIR/feature-gate-guard-patterns.rs:10:9
|
LL | (0 if guard(0)) => {},
| ^ ^
|
help: remove parentheses surrounding the pattern
|
LL - (0 if guard(0)) => {},
LL + 0 if guard(0) => {},
|
error[E0425]: cannot find value `x` in this scope
--> $DIR/feature-gate-guard-patterns.rs:21:22
|
LL | let ((x if guard(x)) | x) = 0;
| ^ not found in this scope
error[E0425]: cannot find value `x` in this scope
--> $DIR/feature-gate-guard-patterns.rs:38:45
|
LL | fn even_as_function_parameters(((x if guard(x), _) | (_, x)): (i32, i32)) {}
| ^
|
help: the binding `x` is available in a different scope in the same function
--> $DIR/feature-gate-guard-patterns.rs:21:11
|
LL | let ((x if guard(x)) | x) = 0;
| ^
error[E0658]: guard patterns are experimental
--> $DIR/feature-gate-guard-patterns.rs:16:15
|
LL | (0 if guard(0)) | 1 => {},
| ^^^^^^^^
|
= note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
= help: add `#![feature(guard_patterns)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: consider using match arm guards
error[E0658]: guard patterns are experimental
--> $DIR/feature-gate-guard-patterns.rs:21:16
|
LL | let ((x if guard(x)) | x) = 0;
| ^^^^^^^^
|
= note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
= help: add `#![feature(guard_patterns)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: consider using match arm guards
error[E0658]: guard patterns are experimental
--> $DIR/feature-gate-guard-patterns.rs:25:18
|
LL | if let (x if guard(x)) = 0 {}
| ^^^^^^^^
|
= note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
= help: add `#![feature(guard_patterns)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: consider using match arm guards
error[E0658]: guard patterns are experimental
--> $DIR/feature-gate-guard-patterns.rs:29:21
|
LL | while let (x if guard(x)) = 0 {}
| ^^^^^^^^
|
= note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
= help: add `#![feature(guard_patterns)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: consider using match arm guards
error[E0658]: guard patterns are experimental
--> $DIR/feature-gate-guard-patterns.rs:34:21
|
LL | while let (x if guard(x)) = 0 {}
| ^^^^^^^^
|
= note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
= help: add `#![feature(guard_patterns)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: consider using match arm guards
error[E0658]: guard patterns are experimental
--> $DIR/feature-gate-guard-patterns.rs:38:39
|
LL | fn even_as_function_parameters(((x if guard(x), _) | (_, x)): (i32, i32)) {}
| ^^^^^^^^
|
= note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
= help: add `#![feature(guard_patterns)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
= help: consider using match arm guards
warning: irrefutable `if let` pattern
--> $DIR/feature-gate-guard-patterns.rs:25:8
|
LL | if let (x if guard(x)) = 0 {}
| ^^^^^^^^^^^^^^^^^^^^^^^
|
= note: this pattern will always match, so the `if let` is useless
= help: consider replacing the `if let` with a `let`
= note: `#[warn(irrefutable_let_patterns)]` on by default
warning: irrefutable `while let` pattern
--> $DIR/feature-gate-guard-patterns.rs:29:11
|
LL | while let (x if guard(x)) = 0 {}
| ^^^^^^^^^^^^^^^^^^^^^^^
|
= note: this pattern will always match, so the loop will never exit
= help: consider instead using a `loop { ... }` with a `let` inside it
error: aborting due to 9 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0425, E0658.
For more information about an error, try `rustc --explain E0425`.
|
