1 // Copyright 2023 The Fuchsia Authors
2 //
3 // Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
4 // <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
5 // license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
6 // This file may not be copied, modified, or distributed except according to
7 // those terms.
8
9 extern crate zerocopy;
10
11 use zerocopy::KnownLayout;
12
main()13 fn main() {}
14
15 // These tests cause errors which are generated by a later compilation pass than
16 // the other errors we generate, and so if they're compiled in the same file,
17 // the compiler will never get to that pass, and so we won't get the errors.
18
19 //
20 // KnownLayout errors
21 //
22
assert_kl<T: ?Sized + KnownLayout>(_: &T)23 fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {}
24
25 // | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
26 // | N | Y | N | N | KL04 |
27 #[derive(KnownLayout)]
28 struct KL04<T: ?Sized>(u8, T);
29
test_kl04<T: ?Sized>(kl: &KL04<T>)30 fn test_kl04<T: ?Sized>(kl: &KL04<T>) {
31 assert_kl(kl);
32 }
33
34 // | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
35 // | N | Y | Y | N | KL06 |
36 #[derive(KnownLayout)]
37 struct KL06<T: ?Sized + KnownLayout>(u8, T);
38
test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>)39 fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) {
40 assert_kl(kl);
41 }
42
43 // | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
44 // | Y | Y | N | N | KL12 |
45 #[derive(KnownLayout)]
46 #[repr(C)]
47 struct KL12<T: ?Sized>(u8, T);
48
test_kl12<T: ?Sized>(kl: &KL12<T>)49 fn test_kl12<T: ?Sized>(kl: &KL12<T>) {
50 assert_kl(kl)
51 }
52
53 // | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name |
54 // | Y | Y | N | Y | KL13 |
55 #[derive(KnownLayout)]
56 #[repr(C)]
57 struct KL13<T>(u8, T);
58
test_kl13<T>(t: T) -> impl KnownLayout59 fn test_kl13<T>(t: T) -> impl KnownLayout {
60 KL13(0u8, t)
61 }
62