src/test/compile-fail/not-copy-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 do not implement `Copy` if their environment is not `Copy`.
  12
  13 #![feature(copy_closures)]
  14 #![feature(clone_closures)]
  15
  16 fn main() {
  17     let mut a = 5;
  18     let hello = || {
  19         a += 1;
  20     };
  21
  22     let b = hello;
  23     let c = hello; //~ ERROR use of moved value: `hello` [E0382]
  24 }