src/test/compile-fail/union/union-feature-gate.rs

   1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // gate-test-untagged_unions
  12
  13 union U1 { // OK
  14     a: u8,
  15 }
  16
  17 union U2<T: Copy> { // OK
  18     a: T,
  19 }
  20
  21 union U3 { //~ ERROR unions with non-`Copy` fields are unstable
  22     a: String,
  23 }
  24
  25 union U4<T> { //~ ERROR unions with non-`Copy` fields are unstable
  26     a: T,
  27 }
  28
  29 union U5 { //~ ERROR unions with `Drop` implementations are unstable
  30     a: u8,
  31 }
  32
  33 impl Drop for U5 {
  34     fn drop(&mut self) {}
  35 }
  36
  37 fn main() {}