transmute-mut-dst-not-frombytes.rs

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// Copyright 2023 The Fuchsia Authors

//

// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0

// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT

// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.

// This file may not be copied, modified, or distributed except according to

// those terms.

extern crate zerocopy;

use zerocopy::transmute_mut;

fn main() {}

#[derive(zerocopy::FromZeroes, zerocopy::FromBytes, zerocopy::AsBytes)]

#[repr(C)]

struct Src;

#[derive(zerocopy::AsBytes)]

#[repr(C)]

struct Dst;

// `transmute_mut` requires that the destination type implements `FromBytes`

const DST_NOT_FROM_BYTES: &mut Dst = transmute_mut!(&mut Src);