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
|
//@ run-pass
#![allow(dead_code)]
struct Rec {
f: Box<isize>,
}
struct Outer {
f: Inner
}
struct Inner {
g: Innermost
}
struct Innermost {
h: Box<isize>,
}
fn borrow(_v: &isize) {}
fn box_mut(v: &mut Box<isize>) {
borrow(&**v); // OK: &mut -> &imm
}
fn box_mut_rec(v: &mut Rec) {
borrow(&*v.f); // OK: &mut -> &imm
}
fn box_mut_recs(v: &mut Outer) {
borrow(&*v.f.g.h); // OK: &mut -> &imm
}
fn box_imm(v: &Box<isize>) {
borrow(&**v); // OK
}
fn box_imm_rec(v: &Rec) {
borrow(&*v.f); // OK
}
fn box_imm_recs(v: &Outer) {
borrow(&*v.f.g.h); // OK
}
pub fn main() {
}
|
