blob: 2dc405ffcd4c0a100c0a3ee24a80e9af9456a214 (
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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
// Tests that two closures cannot simultaneously have mutable
// and immutable access to the variable. Issue #6801.
#![feature(box_syntax)]
fn get(x: &isize) -> isize {
*x
}
fn set(x: &mut isize) {
*x = 4;
}
fn a() {
let mut x = 3;
let c1 = || x = 4;
let c2 = || x * 5;
//~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
drop(c1);
}
fn b() {
let mut x = 3;
let c1 = || set(&mut x);
let c2 = || get(&x);
//~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
drop(c1);
}
fn c() {
let mut x = 3;
let c1 = || set(&mut x);
let c2 = || x * 5;
//~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
drop(c1);
}
fn d() {
let mut x = 3;
let c2 = || x * 5;
x = 5;
//~^ ERROR cannot assign to `x` because it is borrowed
drop(c2);
}
fn e() {
let mut x = 3;
let c1 = || get(&x);
x = 5;
//~^ ERROR cannot assign to `x` because it is borrowed
drop(c1);
}
fn f() {
let mut x: Box<_> = box 3;
let c1 = || get(&*x);
*x = 5;
//~^ ERROR cannot assign to `*x` because it is borrowed
drop(c1);
}
fn g() {
struct Foo {
f: Box<isize>
}
let mut x: Box<_> = box Foo { f: box 3 };
let c1 = || get(&*x.f);
*x.f = 5;
//~^ ERROR cannot assign to `*x.f` because it is borrowed
drop(c1);
}
fn h() {
struct Foo {
f: Box<isize>
}
let mut x: Box<_> = box Foo { f: box 3 };
let c1 = || get(&*x.f);
let c2 = || *x.f = 5;
//~^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
drop(c1);
}
fn main() {
}
|
