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// 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.
#![allow(warnings)]
use std::{marker::PhantomData, option::IntoIter};
use {
static_assertions::assert_impl_all,
zerocopy::{FromBytes, FromZeroes},
};
// A union is `FromBytes` if:
// - all fields are `FromBytes`
#[derive(Clone, Copy, FromZeroes, FromBytes)]
union Zst {
a: (),
}
assert_impl_all!(Zst: FromBytes);
#[derive(FromZeroes, FromBytes)]
union One {
a: u8,
}
assert_impl_all!(One: FromBytes);
#[derive(FromZeroes, FromBytes)]
union Two {
a: u8,
b: Zst,
}
assert_impl_all!(Two: FromBytes);
#[derive(FromZeroes, FromBytes)]
union TypeParams<'a, T: Copy, I: Iterator>
where
I::Item: Copy,
{
a: T,
c: I::Item,
d: u8,
e: PhantomData<&'a [u8]>,
f: PhantomData<&'static str>,
g: PhantomData<String>,
}
assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: FromBytes);
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