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1 | // Copyright 2012 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 | ||
1a4d82fc | 11 | #![feature(unboxed_closures)] |
223e47cc | 12 | |
1a4d82fc | 13 | use std::ops::{FnMut}; |
970d7e83 | 14 | |
1a4d82fc | 15 | struct S { |
85aaf69f SL |
16 | x: i32, |
17 | y: i32, | |
1a4d82fc | 18 | } |
223e47cc | 19 | |
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20 | impl FnMut<()> for S { |
21 | type Output = i32; | |
22 | extern "rust-call" fn call_mut(&mut self, (): ()) -> i32 { | |
1a4d82fc | 23 | self.x * self.y |
223e47cc LB |
24 | } |
25 | } | |
26 | ||
27 | fn main() { | |
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28 | let mut s = S { |
29 | x: 3, | |
30 | y: 3, | |
31 | }; | |
32 | let ans = s(); | |
33 | assert_eq!(ans, 9); | |
223e47cc | 34 | } |
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35 | |
36 |