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1 | // Copyright 2014 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 | // Test using overloaded indexing when the "map" is stored in a | |
12 | // field. This caused problems at some point. | |
13 | ||
14 | use std::ops::Index; | |
15 | ||
16 | struct Foo { | |
17 | x: int, | |
18 | y: int, | |
19 | } | |
20 | ||
21 | struct Bar { | |
22 | foo: Foo | |
23 | } | |
24 | ||
25 | impl Index<int> for Foo { | |
26 | type Output = int; | |
27 | ||
28 | fn index(&self, z: &int) -> &int { | |
29 | if *z == 0 { | |
30 | &self.x | |
31 | } else { | |
32 | &self.y | |
33 | } | |
34 | } | |
35 | } | |
36 | ||
37 | trait Int { | |
38 | fn get(self) -> int; | |
39 | fn get_from_ref(&self) -> int; | |
40 | fn inc(&mut self); | |
41 | } | |
42 | ||
43 | impl Int for int { | |
44 | fn get(self) -> int { self } | |
45 | fn get_from_ref(&self) -> int { *self } | |
46 | fn inc(&mut self) { *self += 1; } | |
47 | } | |
48 | ||
49 | fn main() { | |
50 | let f = Bar { foo: Foo { | |
51 | x: 1, | |
52 | y: 2, | |
53 | } }; | |
54 | assert_eq!(f.foo[1].get(), 2); | |
55 | } |