| // 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. |
| |
| #![feature(untagged_unions)] |
| |
| // Non-copy |
| struct A; |
| struct B; |
| |
| union U { |
| a: A, |
| b: B, |
| } |
| |
| fn main() { |
| unsafe { |
| { |
| let mut u = U { a: A }; |
| let a = u.a; |
| let a = u.a; //~ ERROR use of moved value: `u.a` |
| } |
| { |
| let mut u = U { a: A }; |
| let a = u.a; |
| u.a = A; |
| let a = u.a; // OK |
| } |
| { |
| let mut u = U { a: A }; |
| let a = u.a; |
| u.b = B; |
| let a = u.a; // OK |
| } |
| } |
| } |