rust/tests/ui/binding/irrefutable-in-let-chains.stderr at cdf1cdef9aca7b60a64018e87e3e840d06a29c89 · rust-lang/rust · GitHub

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
warning: irrefutable `if let` pattern
  --> $DIR/irrefutable-in-let-chains.rs:15:8
   |
LL |     if let first = &opt {}
   |        ^^^^^^^^^^^^^^^^
   |
   = 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 `if let` pattern
  --> $DIR/irrefutable-in-let-chains.rs:32:8
   |
LL |     if let Range { start: local_start, end: _ } = (None..Some(1)) {}
   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this pattern will always match, so the `if let` is useless
   = help: consider replacing the `if let` with a `let`

warning: irrefutable `if let` pattern
  --> $DIR/irrefutable-in-let-chains.rs:39:8
   |
LL |     if let (a, b, c) = (Some(1), Some(1), Some(1)) {}
   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this pattern will always match, so the `if let` is useless
   = help: consider replacing the `if let` with a `let`

warning: irrefutable `if let` pattern
  --> $DIR/irrefutable-in-let-chains.rs:51:15
   |
LL |     } else if let x = opt.clone().map(|_| 1) {
   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this pattern will always match, so the `if let` is useless
   = help: consider replacing the `if let` with a `let`

warning: irrefutable `if let` guard pattern
  --> $DIR/irrefutable-in-let-chains.rs:72:28
   |
LL |         Some(ref first) if let second = first => {}
   |                            ^^^^^^^^^^^^^^^^^^
   |
   = note: this pattern will always match, so the guard is useless
   = help: consider removing the guard and adding a `let` inside the match arm

warning: irrefutable `while let` pattern
  --> $DIR/irrefutable-in-let-chains.rs:101:11
   |
LL |     while let first = &opt {}
   |           ^^^^^^^^^^^^^^^^
   |
   = note: this pattern will always match, so the loop will never exit
   = help: consider instead using a `loop { ... }` with a `let` inside it

warning: 6 warnings emitted