]>
Commit | Line | Data |
---|---|---|
970d7e83 LB |
1 | // Copyright 2012-2013 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 | ||
11 | // Tests that the scope of the pointer returned from `get()` is | |
12 | // limited to the deref operation itself, and does not infect the | |
13 | // block as a whole. | |
14 | ||
c34b1796 AL |
15 | // pretty-expanded FIXME #23616 |
16 | ||
970d7e83 | 17 | struct Box { |
c34b1796 | 18 | x: usize |
970d7e83 LB |
19 | } |
20 | ||
21 | impl Box { | |
c34b1796 | 22 | fn get(&self) -> &usize { |
970d7e83 LB |
23 | &self.x |
24 | } | |
c34b1796 | 25 | fn set(&mut self, x: usize) { |
970d7e83 LB |
26 | self.x = x; |
27 | } | |
28 | } | |
29 | ||
30 | fn fun1() { | |
31 | // in the past, borrow checker behaved differently when | |
32 | // init and decl of `v` were distinct | |
33 | let v; | |
1a4d82fc JJ |
34 | let mut a_box = Box {x: 0}; |
35 | a_box.set(22); | |
36 | v = *a_box.get(); | |
37 | a_box.set(v+1); | |
38 | assert_eq!(23, *a_box.get()); | |
970d7e83 LB |
39 | } |
40 | ||
41 | fn fun2() { | |
1a4d82fc JJ |
42 | let mut a_box = Box {x: 0}; |
43 | a_box.set(22); | |
44 | let v = *a_box.get(); | |
45 | a_box.set(v+1); | |
46 | assert_eq!(23, *a_box.get()); | |
970d7e83 LB |
47 | } |
48 | ||
49 | pub fn main() { | |
50 | fun1(); | |
51 | fun2(); | |
1a4d82fc | 52 | } |