65 lines
1.3 KiB
Rust
65 lines
1.3 KiB
Rust
// Copyright 2022 The Fuchsia Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#![allow(warnings)]
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#[macro_use]
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mod util;
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use std::{marker::PhantomData, option::IntoIter};
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use {static_assertions::assert_impl_all, zerocopy::KnownLayout};
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#[derive(Clone, Copy, KnownLayout)]
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union Zst {
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a: (),
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}
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assert_impl_all!(Zst: KnownLayout);
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#[derive(KnownLayout)]
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union One {
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a: bool,
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}
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assert_impl_all!(One: KnownLayout);
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#[derive(KnownLayout)]
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union Two {
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a: bool,
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b: Zst,
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}
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assert_impl_all!(Two: KnownLayout);
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#[derive(KnownLayout)]
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union TypeParams<'a, T: Copy, I: Iterator>
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where
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I::Item: Copy,
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{
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a: T,
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c: I::Item,
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d: u8,
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e: PhantomData<&'a [u8]>,
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f: PhantomData<&'static str>,
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g: PhantomData<String>,
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}
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assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: KnownLayout);
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// Deriving `KnownLayout` should work if the union has bounded parameters.
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#[derive(KnownLayout)]
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#[repr(C)]
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union WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + KnownLayout>
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where
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'a: 'b,
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'b: 'a,
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T: 'a + 'b + Copy + KnownLayout,
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{
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a: [T; N],
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b: PhantomData<&'a &'b ()>,
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}
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assert_impl_all!(WithParams<'static, 'static, 42, u8>: KnownLayout);
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