| // Copyright 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. |
| |
| // pretty-expanded FIXME #23616 |
| |
| #![allow(unknown_features)] |
| #![feature(box_syntax, io)] |
| |
| use std::io::{self, Write}; |
| |
| fn f(wr: &mut Write) { |
| wr.write_all(b"hello").ok().expect("failed"); |
| } |
| |
| fn main() { |
| let mut wr = box io::stdout() as Box<Write>; |
| f(&mut wr); |
| } |
