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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 | ||
11 | // Tests "capabilities" granted by traits that inherit from super- | |
12 | // builtin-kinds, e.g., if a trait requires Send to implement, then | |
13 | // at usage site of that trait, we know we have the Send capability. | |
14 | ||
c34b1796 | 15 | |
1a4d82fc JJ |
16 | use std::sync::mpsc::{channel, Sender, Receiver}; |
17 | ||
18 | trait Foo : Send { } | |
19 | ||
20 | impl <T: Send> Foo for T { } | |
21 | ||
85aaf69f | 22 | fn foo<T: Foo + 'static>(val: T, chan: Sender<T>) { |
1a4d82fc JJ |
23 | chan.send(val).unwrap(); |
24 | } | |
25 | ||
26 | pub fn main() { | |
c34b1796 | 27 | let (tx, rx): (Sender<isize>, Receiver<isize>) = channel(); |
85aaf69f | 28 | foo(31337, tx); |
62682a34 | 29 | assert_eq!(rx.recv().unwrap(), 31337); |
1a4d82fc | 30 | } |