tests/ui/pattern/mut-ref-mut-2021.rs


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

//@ edition: 2021
#![allow(incomplete_features)]
#![feature(mut_ref)]

struct Foo(u8);

fn main() {
    let Foo(a) = Foo(0);
    a = 42; //~ ERROR [E0384]

    let Foo(mut a) = Foo(0);
    a = 42;

    let Foo(ref a) = Foo(0);
    a = &42; //~ ERROR [E0384]

    let Foo(mut ref a) = Foo(0);
    a = &42;

    let Foo(ref mut a) = Foo(0);
    a = &mut 42; //~ ERROR [E0384]

    let Foo(mut ref mut a) = Foo(0);
    a = &mut 42;

    let Foo(a) = &Foo(0);
    a = &42; //~ ERROR [E0384]

    let Foo(mut a) = &Foo(0);
    a = 42;

    let Foo(ref a) = &Foo(0);
    a = &42; //~ ERROR [E0384]

    let Foo(mut ref a) = &Foo(0);
    a = &42;

    let Foo(a) = &mut Foo(0);
    a = &mut 42; //~ ERROR [E0384]

    let Foo(mut a) = &mut Foo(0);
    a = 42;

    let Foo(ref a) = &mut Foo(0);
    a = &42; //~ ERROR [E0384]

    let Foo(mut ref a) = &mut Foo(0);
    a = &42;

    let Foo(ref mut a) = &mut Foo(0);
    a = &mut 42; //~ ERROR [E0384]

    let Foo(mut ref mut a) = &mut Foo(0);
    a = &mut 42;
}