rust/tests/ui/drop/issue-90752.rs

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2021-11-11 00:22:16 +00:00
// run-pass
use std::cell::RefCell;
struct S<'a>(i32, &'a RefCell<Vec<i32>>);
impl<'a> Drop for S<'a> {
fn drop(&mut self) {
self.1.borrow_mut().push(self.0);
}
}
fn test(drops: &RefCell<Vec<i32>>) {
let mut foo = None;
match foo {
None => (),
_ => return,
}
*(&mut foo) = Some((S(0, drops), S(1, drops))); // Both S(0) and S(1) should be dropped
match foo {
Some((_x, _)) => {}
_ => {}
}
}
fn main() {
let drops = RefCell::new(Vec::new());
test(&drops);
assert_eq!(*drops.borrow(), &[0, 1]);
}