summaryrefslogtreecommitdiff
path: root/tests/ui-stable/union.rs
blob: e7761e0e30c33c319979acb4e8360ce9918a0b22 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#[macro_use]
extern crate zerocopy;

#[path = "../util.rs"]
mod util;

use self::util::AU16;
use std::mem::ManuallyDrop;

fn main() {}

//
// AsBytes errors
//

#[derive(AsBytes)]
#[repr(C)]
union AsBytes1<T> {
    foo: ManuallyDrop<T>,
}

#[derive(AsBytes)]
#[repr(C)]
union AsBytes2 {
    foo: u8,
    bar: [u8; 2],
}

//
// Unaligned errors
//

#[derive(Unaligned)]
#[repr(C, align(2))]
union Unaligned1 {
    foo: i16,
    bar: AU16,
}

// Transparent unions are unstable; see issue #60405
// <https://github.com/rust-lang/rust/issues/60405> for more information.

// #[derive(Unaligned)]
// #[repr(transparent, align(2))]
// union Unaligned2 {
//     foo: u8,
// }

#[derive(Unaligned)]
#[repr(packed, align(2))]
union Unaligned3 {
    foo: u8,
}

#[derive(Unaligned)]
#[repr(align(1), align(2))]
struct Unaligned4 {
    foo: u8,
}

#[derive(Unaligned)]
#[repr(align(2), align(4))]
struct Unaligned5 {
    foo: u8,
}