rust/src/test/run-pass/sendfn-is-a-block.rs

// Copyright 2012-2014 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.


fn test<F>(f: F) -> uint where F: FnOnce(uint) -> uint {
    return f(22_usize);
}

pub fn main() {
    let y = test(|x| 4_usize * x);
    assert_eq!(y, 88_usize);
}