summaryrefslogtreecommitdiffstats
path: root/tests/ui/borrowck/borrowck-closures-two-imm.rs
blob: ab135194a0911ee31f37e47521f71c0f01ec2213 (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
// run-pass
// Tests that two closures can simultaneously have immutable
// access to the variable, whether that immutable access be used
// for direct reads or for taking immutable ref. Also check
// that the main function can read the variable too while
// the closures are in scope. Issue #6801.


fn a() -> i32 {
    let mut x = 3;
    x += 1;
    let c1 = || x * 4;
    let c2 = || x * 5;
    c1() * c2() * x
}

fn get(x: &i32) -> i32 {
    *x * 4
}

fn b() -> i32 {
    let mut x = 3;
    x += 1;
    let c1 = || get(&x);
    let c2 = || get(&x);
    c1() * c2() * x
}

fn c() -> i32 {
    let mut x = 3;
    x += 1;
    let c1 = || x * 5;
    let c2 = || get(&x);
    c1() * c2() * x
}

pub fn main() {
    assert_eq!(a(), 1280);
    assert_eq!(b(), 1024);
    assert_eq!(c(), 1280);
}