blob: 465c9476ba65b1636532ab50c9b3650543242747 (
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
|
// edition:2021
// check-pass
#![warn(unused)]
#![allow(dead_code)]
#[derive(Debug)]
struct MyStruct {
a: i32,
b: i32,
}
pub fn unintentional_copy_one() {
let mut a = 1;
let mut last = MyStruct{ a: 1, b: 1};
let mut f = move |s| {
// This will not trigger a warning for unused variable
// as last.a will be treated as a Non-tracked place
last.a = s;
a = s;
//~^ WARN value assigned to `a` is never read
//~| WARN unused variable: `a`
};
f(2);
f(3);
f(4);
}
pub fn unintentional_copy_two() {
let mut a = 1;
let mut sum = MyStruct{ a: 1, b: 0};
(1..10).for_each(move |x| {
// This will not trigger a warning for unused variable
// as sum.b will be treated as a Non-tracked place
sum.b += x;
a += x; //~ WARN unused variable: `a`
});
}
fn main() {
unintentional_copy_one();
unintentional_copy_two();
}
|
