69 lines
1.7 KiB
Rust
69 lines
1.7 KiB
Rust
// Copyright 2023 The Fuchsia Authors
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//
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// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
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// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
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// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
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// This file may not be copied, modified, or distributed except according to
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// those terms.
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// See comment in `include.rs` for why we disable the prelude.
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#![no_implicit_prelude]
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#![allow(warnings)]
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include!("include.rs");
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#[derive(Clone, Copy, imp::Immutable)]
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union Zst {
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a: (),
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}
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util_assert_impl_all!(Zst: imp::Immutable);
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#[derive(imp::Immutable)]
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union One {
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a: bool,
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}
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util_assert_impl_all!(One: imp::Immutable);
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#[derive(imp::Immutable)]
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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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util_assert_impl_all!(Two: imp::Immutable);
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#[derive(imp::Immutable)]
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union TypeParams<'a, T: imp::Copy, I: imp::Iterator>
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where
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I::Item: imp::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: imp::PhantomData<&'a [::core::primitive::u8]>,
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f: imp::PhantomData<&'static ::core::primitive::str>,
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g: imp::PhantomData<imp::String>,
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}
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util_assert_impl_all!(TypeParams<'static, (), imp::IntoIter<()>>: imp::Immutable);
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// Deriving `imp::Immutable` should work if the union has bounded parameters.
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#[derive(imp::Immutable)]
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#[repr(C)]
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union WithParams<'a: 'b, 'b: 'a, T: 'a + 'b + imp::Immutable, const N: usize>
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where
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'a: 'b,
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'b: 'a,
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T: 'a + 'b + imp::Copy + imp::Immutable,
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{
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a: [T; N],
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b: imp::PhantomData<&'a &'b ()>,
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c: imp::PhantomData<imp::UnsafeCell<()>>,
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d: &'a imp::UnsafeCell<()>,
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}
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util_assert_impl_all!(WithParams<'static, 'static, u8, 42>: imp::Immutable);
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