rust/tests/ui/span/regions-infer-borrow-scope-within-loop.rs
2023-01-11 09:32:08 +00:00

23 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() {}