Vendor things

third-party/vendor/zerocopy-derive/tests/enum_as_bytes.rs

@@ -0,0 +1,101 @@
+// 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::AsBytes};
+
+// An enum is `AsBytes` if if has a defined repr.
+
+#[derive(AsBytes)]
+#[repr(C)]
+enum C {
+    A,
+}
+
+assert_impl_all!(C: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(u8)]
+enum U8 {
+    A,
+}
+
+assert_impl_all!(U8: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(u16)]
+enum U16 {
+    A,
+}
+
+assert_impl_all!(U16: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(u32)]
+enum U32 {
+    A,
+}
+
+assert_impl_all!(U32: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(u64)]
+enum U64 {
+    A,
+}
+
+assert_impl_all!(U64: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(usize)]
+enum Usize {
+    A,
+}
+
+assert_impl_all!(Usize: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(i8)]
+enum I8 {
+    A,
+}
+
+assert_impl_all!(I8: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(i16)]
+enum I16 {
+    A,
+}
+
+assert_impl_all!(I16: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(i32)]
+enum I32 {
+    A,
+}
+
+assert_impl_all!(I32: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(i64)]
+enum I64 {
+    A,
+}
+
+assert_impl_all!(I64: AsBytes);
+
+#[derive(AsBytes)]
+#[repr(isize)]
+enum Isize {
+    A,
+}
+
+assert_impl_all!(Isize: AsBytes);