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1 | // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
c34b1796 | 11 | static mut drop_count: usize = 0; |
1a4d82fc | 12 | |
1a4d82fc JJ |
13 | struct Foo { |
14 | dropped: bool | |
15 | } | |
16 | ||
17 | impl Drop for Foo { | |
18 | fn drop(&mut self) { | |
19 | // Test to make sure we haven't dropped already | |
20 | assert!(!self.dropped); | |
21 | self.dropped = true; | |
22 | // And record the fact that we dropped for verification later | |
23 | unsafe { drop_count += 1; } | |
24 | } | |
25 | } | |
26 | ||
27 | pub fn main() { | |
28 | // An `if true { expr }` statement should compile the same as `{ expr }`. | |
29 | if true { | |
30 | let _a = Foo{ dropped: false }; | |
31 | } | |
32 | // Check that we dropped already (as expected from a `{ expr }`). | |
62682a34 | 33 | unsafe { assert_eq!(drop_count, 1); } |
1a4d82fc JJ |
34 | |
35 | // An `if false {} else { expr }` statement should compile the same as `{ expr }`. | |
36 | if false { | |
37 | panic!(); | |
38 | } else { | |
39 | let _a = Foo{ dropped: false }; | |
40 | } | |
41 | // Check that we dropped already (as expected from a `{ expr }`). | |
62682a34 | 42 | unsafe { assert_eq!(drop_count, 2); } |
1a4d82fc | 43 | } |