summaryrefslogtreecommitdiffstats
path: root/tests/ui/issues/issue-40288-2.rs
blob: 032a2e65ff07e81fdd51d537bd6f3b06ab5a2c50 (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
fn prove_static<T: 'static + ?Sized>(_: &'static T) {}

fn lifetime_transmute_slice<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
    let mut out = [x];
    {
        let slice: &mut [_] = &mut out;
        slice[0] = y;
    }
    out[0]
    //~^ ERROR explicit lifetime required in the type of `y` [E0621]
}

struct Struct<T, U: ?Sized> {
    head: T,
    _tail: U
}

fn lifetime_transmute_struct<'a, T: ?Sized>(x: &'a T, y: &T) -> &'a T {
    let mut out = Struct { head: x, _tail: [()] };
    {
        let dst: &mut Struct<_, [()]> = &mut out;
        dst.head = y;
    }
    out.head
    //~^ ERROR explicit lifetime required in the type of `y` [E0621]
}

fn main() {
    prove_static(lifetime_transmute_slice("", &String::from("foo")));
    prove_static(lifetime_transmute_struct("", &String::from("bar")));
}