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
|
// run-pass
// Test that a `&mut` inside of an `&` is freezable.
struct MutSlice<'a, T:'a> {
data: &'a mut [T]
}
fn get<'a, T>(ms: &'a MutSlice<'a, T>, index: usize) -> &'a T {
&ms.data[index]
}
pub fn main() {
let mut data = [1, 2, 3];
{
let slice = MutSlice { data: &mut data };
slice.data[0] += 4;
let index0 = get(&slice, 0);
let index1 = get(&slice, 1);
let index2 = get(&slice, 2);
assert_eq!(*index0, 5);
assert_eq!(*index1, 2);
assert_eq!(*index2, 3);
}
assert_eq!(data[0], 5);
assert_eq!(data[1], 2);
assert_eq!(data[2], 3);
}
|
