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// Copyright 2022 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)]
#[macro_use]
mod util;
use std::{marker::PhantomData, option::IntoIter};
use {static_assertions::assert_impl_all, zerocopy::KnownLayout};
#[derive(Clone, Copy, KnownLayout)]
union Zst {
a: (),
}
assert_impl_all!(Zst: KnownLayout);
#[derive(KnownLayout)]
union One {
a: bool,
}
assert_impl_all!(One: KnownLayout);
#[derive(KnownLayout)]
union Two {
a: bool,
b: Zst,
}
assert_impl_all!(Two: KnownLayout);
#[derive(KnownLayout)]
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<()>>: KnownLayout);
// Deriving `KnownLayout` should work if the union has bounded parameters.
#[derive(KnownLayout)]
#[repr(C)]
union WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + KnownLayout>
where
'a: 'b,
'b: 'a,
T: 'a + 'b + Copy + KnownLayout,
{
a: [T; N],
b: PhantomData<&'a &'b ()>,
}
assert_impl_all!(WithParams<'static, 'static, 42, u8>: KnownLayout);