Vendor things

third-party/vendor/zerocopy-derive/tests/enum_unaligned.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.
+
+#![allow(warnings)]
+
+use {static_assertions::assert_impl_all, zerocopy::Unaligned};
+
+// An enum is `Unaligned` if:
+// - No `repr(align(N > 1))`
+// - `repr(u8)` or `repr(i8)`
+
+#[derive(Unaligned)]
+#[repr(u8)]
+enum Foo {
+    A,
+}
+
+assert_impl_all!(Foo: Unaligned);
+
+#[derive(Unaligned)]
+#[repr(i8)]
+enum Bar {
+    A,
+}
+
+assert_impl_all!(Bar: Unaligned);
+
+#[derive(Unaligned)]
+#[repr(u8, align(1))]
+enum Baz {
+    A,
+}
+
+assert_impl_all!(Baz: Unaligned);
+
+#[derive(Unaligned)]
+#[repr(i8, align(1))]
+enum Blah {
+    B,
+}
+
+assert_impl_all!(Blah: Unaligned);