src/test/run-pass/regions-copy-closure.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 struct closure_box<'a> {
  12     cl: Box<FnMut() + 'a>,
  13 }
  14
  15 fn box_it<'a>(x: Box<FnMut() + 'a>) -> closure_box<'a> {
  16     closure_box {cl: x}
  17 }
  18
  19 pub fn main() {
  20     let mut i = 3;
  21     assert_eq!(i, 3);
  22     {
  23         let cl = || i += 1;
  24         let mut cl_box = box_it(Box::new(cl));
  25         (cl_box.cl)();
  26     }
  27     assert_eq!(i, 4);
  28 }