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
|
// run-pass
#![allow(non_upper_case_globals)]
static mut drop_count: usize = 0;
struct Foo {
dropped: bool
}
impl Drop for Foo {
fn drop(&mut self) {
// Test to make sure we haven't dropped already
assert!(!self.dropped);
self.dropped = true;
// And record the fact that we dropped for verification later
unsafe { drop_count += 1; }
}
}
pub fn main() {
// An `if true { expr }` statement should compile the same as `{ expr }`.
if true {
let _a = Foo{ dropped: false };
}
// Check that we dropped already (as expected from a `{ expr }`).
unsafe { assert_eq!(drop_count, 1); }
// An `if false {} else { expr }` statement should compile the same as `{ expr }`.
if false {
panic!();
} else {
let _a = Foo{ dropped: false };
}
// Check that we dropped already (as expected from a `{ expr }`).
unsafe { assert_eq!(drop_count, 2); }
}
|
