rust/src/libcore/clone.rs

// Copyright 2012 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.

/**
Clonable types are copied with the clone method
*/
pub trait Clone {
    fn clone(&self) -> Self;
}

impl Clone for () {
    #[inline(always)]
    fn clone(&self) -> () { () }
}