| // Copyright 2016 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. |
| |
| // this will get a no-op Clone impl |
| #[derive(Copy, Clone)] |
| struct A { |
| a: i32, |
| b: i64 |
| } |
| |
| // this will get a deep Clone impl |
| #[derive(Copy, Clone)] |
| struct B<T> { |
| a: i32, |
| b: T |
| } |
| |
| struct C; // not Copy or Clone |
| #[derive(Clone)] struct D; // Clone but not Copy |
| |
| fn is_copy<T: Copy>(_: T) {} |
| fn is_clone<T: Clone>(_: T) {} |
| |
| fn main() { |
| // A can be copied and cloned |
| is_copy(A { a: 1, b: 2 }); |
| is_clone(A { a: 1, b: 2 }); |
| |
| // B<i32> can be copied and cloned |
| is_copy(B { a: 1, b: 2 }); |
| is_clone(B { a: 1, b: 2 }); |
| |
| // B<C> cannot be copied or cloned |
| is_copy(B { a: 1, b: C }); //~ERROR Copy |
| is_clone(B { a: 1, b: C }); //~ERROR Clone |
| |
| // B<D> can be cloned but not copied |
| is_copy(B { a: 1, b: D }); //~ERROR Copy |
| is_clone(B { a: 1, b: D }); |
| } |
| |