ee67e14034
In addition to the `Fn*` family of traits, closures now implement `Copy` (and similarly `Clone`) if all of the captures do.
27 lines
775 B
Rust
27 lines
775 B
Rust
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// Check that closures implement `Clone`.
|
|
|
|
#[derive(Clone)]
|
|
struct S(i32);
|
|
|
|
fn main() {
|
|
let mut a = S(5);
|
|
let mut hello = move || {
|
|
a.0 += 1;
|
|
println!("Hello {}", a.0);
|
|
a.0
|
|
};
|
|
|
|
let mut hello2 = hello.clone();
|
|
assert_eq!(6, hello2());
|
|
assert_eq!(6, hello());
|
|
}
|