[rustc.git] / src / test / ui / issues / issue-41498.rs

// run-pass
// regression test for issue #41498.

struct S;
impl S {
    fn mutate(&mut self) {}
}

fn call_and_ref<T, F: FnOnce() -> T>(x: &mut Option<T>, f: F) -> &mut T {
    *x = Some(f());
    x.as_mut().unwrap()
}

fn main() {
    let mut n = None;
    call_and_ref(&mut n, || [S])[0].mutate();
}
Commit	Line	Data
b7449926	1	// run-pass
cc61c64b XL	2	// regression test for issue #41498.
	3
	4	struct S;
	5	impl S {
	6	fn mutate(&mut self) {}
	7	}
	8
	9	fn call_and_ref<T, F: FnOnce() -> T>(x: &mut Option<T>, f: F) -> &mut T {
	10	*x = Some(f());
	11	x.as_mut().unwrap()
	12	}
	13
7453a54e	14	fn main() {
cc61c64b XL	15	let mut n = None;
cc61c64b XL	16	call_and_ref(&mut n, \|\| [S])[0].mutate();
223e47cc	17	}