mirror of
https://github.com/rust-lang/rust
synced 2024-11-05 20:45:15 +00:00
22 lines
486 B
Rust
22 lines
486 B
Rust
fn borrow<T>(x: &T) -> &T {x}
|
|
|
|
fn foo<C, M>(mut cond: C, mut make_box: M) where
|
|
C: FnMut() -> bool,
|
|
M: FnMut() -> Box<isize>,
|
|
{
|
|
let mut y: &isize;
|
|
loop {
|
|
let x = make_box();
|
|
|
|
// Here we complain because the resulting region
|
|
// of this borrow is the fn body as a whole.
|
|
y = borrow(&*x);
|
|
//~^ ERROR `*x` does not live long enough
|
|
|
|
assert_eq!(*x, *y);
|
|
if cond() { break; }
|
|
}
|
|
assert!(*y != 0);
|
|
}
|
|
|
|
fn main() {}
|