1 // Copyright 2018 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.
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.
23 const FLOAT1_AS_I32: i32 = 1065353216;
24 const UNION: DummyUnion = DummyUnion { field1: FLOAT1_AS_I32 };
26 const fn read_field1() -> Field1 {
27 const FIELD1: Field1 = unsafe { UNION.field1 };
31 const fn read_field2() -> Field2 {
32 const FIELD2: Field2 = unsafe { UNION.field2 };
36 const fn read_field3() -> Field3 {
37 const FIELD3: Field3 = unsafe { UNION.field3 };
38 //~^ ERROR it is undefined behavior to use this value
43 assert_eq!(read_field1(), FLOAT1_AS_I32);
44 assert_eq!(read_field2(), 1.0);
45 assert_eq!(read_field3(), unsafe { UNION.field3 });