blob: 2914127246a0b8b5b92eac6acac65383aaa8bb22 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Ensures that class dtors run if the object is inside an enum
// variant
use std::cell::Cell;
type closable<'a> = &'a Cell<bool>;
struct close_res<'a> {
i: closable<'a>,
}
impl<'a> Drop for close_res<'a> {
fn drop(&mut self) {
self.i.set(false);
}
}
fn close_res(i: closable) -> close_res {
close_res {
i: i
}
}
enum option<T> { none, some(T), }
fn sink(_res: option<close_res>) { }
pub fn main() {
let c = &Cell::new(true);
sink(option::none);
sink(option::some(close_res(c)));
assert!(!c.get());
}
|
