[rustc.git] / src / test / ui / drop / issue-48962.rs

// run-pass
#![allow(unused_must_use)]
// Test that we are able to reinitialize box with moved referent
static mut ORDER: [usize; 3] = [0, 0, 0];
static mut INDEX: usize = 0;

struct Dropee (usize);

impl Drop for Dropee {
    fn drop(&mut self) {
        unsafe {
            ORDER[INDEX] = self.0;
            INDEX = INDEX + 1;
        }
    }
}

fn add_sentintel() {
    unsafe {
        ORDER[INDEX] = 2;
        INDEX = INDEX + 1;
    }
}

fn main() {
    let mut x = Box::new(Dropee(1));
    *x;  // move out from `*x`
    add_sentintel();
    *x = Dropee(3); // re-initialize `*x`
    {x}; // drop value
    unsafe {
        assert_eq!(ORDER, [1, 2, 3]);
    }
}
Commit	Line	Data
b7449926	1	// run-pass
0bf4aa26	2	#![allow(unused_must_use)]
b7449926	3	// Test that we are able to reinitialize box with moved referent
83c7162d XL	4	static mut ORDER: [usize; 3] = [0, 0, 0];
	5	static mut INDEX: usize = 0;
	6
	7	struct Dropee (usize);
	8
	9	impl Drop for Dropee {
	10	fn drop(&mut self) {
	11	unsafe {
	12	ORDER[INDEX] = self.0;
	13	INDEX = INDEX + 1;
	14	}
	15	}
	16	}
	17
	18	fn add_sentintel() {
	19	unsafe {
	20	ORDER[INDEX] = 2;
	21	INDEX = INDEX + 1;
	22	}
	23	}
	24
	25	fn main() {
	26	let mut x = Box::new(Dropee(1));
	27	x; // move out from `x`
	28	add_sentintel();
	29	x = Dropee(3); // re-initialize `x`
	30	{x}; // drop value
	31	unsafe {
	32	assert_eq!(ORDER, [1, 2, 3]);
	33	}
	34	}