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
|
//! Test that the borrow checker prevents pointers to temporaries
//! with statement lifetimes from escaping.
use std::ops::Drop;
static mut FLAGS: u64 = 0;
struct StackBox<T> {
f: T,
}
struct AddFlags {
bits: u64,
}
fn AddFlags(bits: u64) -> AddFlags {
AddFlags { bits }
}
fn arg(x: &AddFlags) -> &AddFlags {
x
}
impl AddFlags {
fn get(&self) -> &AddFlags {
self
}
}
pub fn main() {
let x1 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
let x2 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
let x3 = &*arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
let ref x4 = *arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
let &ref x5 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
let x6 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
let StackBox { f: x7 } = StackBox { f: AddFlags(1).get() };
//~^ ERROR temporary value dropped while borrowed
(x1, x2, x3, x4, x5, x6, x7);
}
|
