src/test/run-pass/functions-closures/copy-closure.rs

   1 // run-pass
   2 // Check that closures implement `Copy`.
   3
   4 fn call<T, F: FnOnce() -> T>(f: F) -> T { f() }
   5
   6 fn main() {
   7     let a = 5;
   8     let hello = || {
   9         println!("Hello {}", a);
  10         a
  11     };
  12
  13     assert_eq!(5, call(hello.clone()));
  14     assert_eq!(5, call(hello));
  15     assert_eq!(5, call(hello));
  16 }