Vendor things

third-party/vendor/zerocopy-derive/tests/ui-stable/union.rs

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+// Copyright 2019 The Fuchsia Authors
+//
+// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
+// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
+// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
+// This file may not be copied, modified, or distributed except according to
+// those terms.
+
+#[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,
+}