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// Protocol Buffers - Google's data interchange format
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// Copyright 2024 Google LLC. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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// Macro to create structs that will act as opaque pointees. These structs are
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// never intended to be dereferenced in Rust.
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// This is a workaround until stabilization of [`extern type`].
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// TODO: convert to extern type once stabilized.
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// [`extern type`]: https://github.com/rust-lang/rust/issues/43467
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macro_rules! opaque_pointee {
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($name: ident) => {
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#[repr(C)]
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pub struct $name {
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_data: [u8; 0],
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_marker: std::marker::PhantomData<(*mut u8, std::marker::PhantomPinned)>,
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}
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};
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}
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pub(crate) use opaque_pointee;
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