src/test/run-pass/sendfn-spawn-with-fn-arg.rs

   1 // Copyright 2012 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 #![allow(unknown_features)]
  12 #![feature(box_syntax)]
  13
  14 use std::thread;
  15
  16 pub fn main() { test05(); }
  17
  18 fn test05_start<F:FnOnce(isize)>(f: F) {
  19     f(22);
  20 }
  21
  22 fn test05() {
  23     let three: Box<_> = box 3;
  24     let fn_to_send = move|n:isize| {
  25         println!("{}", *three + n); // will copy x into the closure
  26         assert_eq!(*three, 3);
  27     };
  28     thread::spawn(move|| {
  29         test05_start(fn_to_send);
  30     }).join().ok().unwrap();
  31 }