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1a4d82fc | 1 | // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT |
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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 | ||
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11 | // Testing guarantees provided by once functions. |
12 | ||
970d7e83 | 13 | |
1a4d82fc | 14 | use std::sync::Arc; |
970d7e83 | 15 | |
1a4d82fc | 16 | fn foo<F:FnOnce()>(blk: F) { |
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17 | blk(); |
18 | } | |
223e47cc | 19 | |
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20 | pub fn main() { |
21 | let x = Arc::new(true); | |
22 | foo(move|| { | |
23 | assert!(*x); | |
24 | drop(x); | |
25 | }); | |
223e47cc | 26 | } |