rust/src/test/run-pass/closure-bounds-can-capture-chan.rs

// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![feature(unboxed_closures)]

use std::comm;

fn foo<F:FnOnce()+Send>(blk: F) {
    blk();
}

pub fn main() {
    let (tx, rx) = channel();
    foo(move || {
        tx.send(());
    });
    rx.recv();
}