blob: 61eda5052a21efed8363013d28c364f042943736 (
plain)
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
|
// run-rustfix
#![allow(unused)]
#![warn(clippy::needless_option_as_deref)]
fn main() {
// should lint
let _: Option<&usize> = Some(&1).as_deref();
let _: Option<&mut usize> = Some(&mut 1).as_deref_mut();
let mut y = 0;
let mut x = Some(&mut y);
let _ = x.as_deref_mut();
// should not lint
let _ = Some(Box::new(1)).as_deref();
let _ = Some(Box::new(1)).as_deref_mut();
let mut y = 0;
let mut x = Some(&mut y);
for _ in 0..3 {
let _ = x.as_deref_mut();
}
let mut y = 0;
let mut x = Some(&mut y);
let mut closure = || {
let _ = x.as_deref_mut();
};
closure();
closure();
// #7846
let mut i = 0;
let mut opt_vec = vec![Some(&mut i)];
opt_vec[0].as_deref_mut().unwrap();
let mut i = 0;
let x = &mut Some(&mut i);
(*x).as_deref_mut();
// #8047
let mut y = 0;
let mut x = Some(&mut y);
x.as_deref_mut();
dbg!(x);
}
struct S<'a> {
opt: Option<&'a mut usize>,
}
fn from_field<'a>(s: &'a mut S<'a>) -> Option<&'a mut usize> {
s.opt.as_deref_mut()
}
|
