src/test/run-pass/clone-closure.rs

   1 // Copyright 2017 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 // Check that closures implement `Clone`.
  12
  13 #[derive(Clone)]
  14 struct S(i32);
  15
  16 fn main() {
  17     let mut a = S(5);
  18     let mut hello = move || {
  19         a.0 += 1;
  20         println!("Hello {}", a.0);
  21         a.0
  22     };
  23
  24     let mut hello2 = hello.clone();
  25     assert_eq!(6, hello2());
  26     assert_eq!(6, hello());
  27 }