90 lines
3.3 KiB
Rust
90 lines
3.3 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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include!("../include.rs");
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use zerocopy::transmute_mut;
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fn main() {}
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// `transmute_mut!` does not support transmuting into a non-reference
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// destination type.
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const DST_NOT_A_REFERENCE: usize = transmute_mut!(&mut 0u8);
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//~[msrv, stable, nightly]^ ERROR: mismatched types
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//~[msrv, stable, nightly]^^ ERROR: mismatched types
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#[derive(zerocopy::FromBytes, zerocopy::IntoBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct SrcA;
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#[derive(zerocopy::IntoBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct DstA;
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// `transmute_mut` requires that the destination type implements `FromBytes`
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const DST_NOT_FROM_BYTES: &mut DstA = transmute_mut!(&mut SrcA);
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//~[msrv, stable, nightly]^ ERROR: the trait bound `DstA: FromBytes` is not satisfied
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#[derive(zerocopy::FromBytes, zerocopy::IntoBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct SrcB;
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#[derive(zerocopy::FromBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct DstB;
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// `transmute_mut` requires that the destination type implements `IntoBytes`
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const DST_NOT_AS_BYTES: &mut DstB = transmute_mut!(&mut SrcB);
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//~[msrv, stable, nightly]^ ERROR: the trait bound `DstB: IntoBytes` is not satisfied
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// `transmute_mut!` does not support transmuting between non-reference source
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// and destination types.
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const SRC_DST_NOT_REFERENCES: &mut usize = transmute_mut!(0usize);
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//~[msrv, stable, nightly]^ ERROR: mismatched types
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fn ref_src_immutable() {
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// `transmute_mut!` requires that its source type be a mutable reference.
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let _: &mut u8 = transmute_mut!(&0u8);
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//~[msrv, stable, nightly]^ ERROR: mismatched types
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}
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// `transmute_mut!` does not support transmuting from a non-reference source
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// type.
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const SRC_NOT_A_REFERENCE: &mut u8 = transmute_mut!(0usize);
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//~[msrv, stable, nightly]^ ERROR: mismatched types
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#[derive(zerocopy::IntoBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct SrcC;
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#[derive(zerocopy::FromBytes, zerocopy::IntoBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct DstC;
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// `transmute_mut` requires that the source type implements `FromBytes`
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const SRC_NOT_FROM_BYTES: &mut DstC = transmute_mut!(&mut SrcC);
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//~[msrv, stable, nightly]^ ERROR: the trait bound `SrcC: FromBytes` is not satisfied
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#[derive(zerocopy::FromBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct SrcD;
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#[derive(zerocopy::FromBytes, zerocopy::IntoBytes, zerocopy::Immutable)]
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#[repr(C)]
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struct DstD;
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// `transmute_mut` requires that the source type implements `IntoBytes`
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const SRC_NOT_AS_BYTES: &mut DstD = transmute_mut!(&mut SrcD);
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//~[msrv, stable, nightly]^ ERROR: the trait bound `SrcD: IntoBytes` is not satisfied
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// `transmute_mut!` does not support transmuting from an unsized source type to
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// a sized destination type.
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const SRC_UNSIZED: &mut [u8; 1] = transmute_mut!(&mut [0u8][..]);
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//~[msrv, stable]^ ERROR: the method `transmute_mut` exists for struct `Wrap<&mut [u8], &mut [u8; 1]>`, but its trait bounds were not satisfied
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//~[nightly]^^ ERROR: transmute_mut` exists for struct `zerocopy::util::macro_util::Wrap<&mut [u8], &mut [u8; 1]>`, but its trait bounds were not satisfied
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