87 lines
3.6 KiB
Rust
87 lines
3.6 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_ref;
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use crate::util::AU16;
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fn main() {}
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fn ref_dst_mutable() {
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// `transmute_ref!` requires that its destination type be an immutable
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// reference.
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let _: &mut u8 = transmute_ref!(&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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//~[msrv, stable, nightly]^^^ ERROR: mismatched types
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//~[msrv, stable, nightly]^^^^ ERROR: mismatched types
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}
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// `transmute_ref!` 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_ref!(&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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//~[msrv, stable, nightly]^^^ ERROR: mismatched types
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//~[msrv, stable, nightly]^^^^ ERROR: mismatched types
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#[derive(zerocopy::Immutable)]
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#[repr(transparent)]
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struct DstA(AU16);
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// `transmute_ref` requires that the destination type implements `FromBytes`
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const DST_NOT_FROM_BYTES: &DstA = transmute_ref!(&AU16(0));
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//~[msrv, stable, nightly]^ ERROR: the trait bound `DstA: FromBytes` is not satisfied
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#[derive(zerocopy::FromBytes)]
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#[repr(transparent)]
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struct DstB(AU16);
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// `transmute_ref` requires that the destination type implements `Immutable`
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const DST_NOT_IMMUTABLE: &DstB = transmute_ref!(&AU16(0));
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//~[msrv, stable, nightly]^ ERROR: the trait bound `DstB: Immutable` is not satisfied
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// `transmute_ref!` does not support transmuting between non-reference source
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// and destination types.
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const SRC_DST_NOT_REFERENCES: usize = transmute_ref!(0usize);
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//~[msrv, stable, nightly]^ ERROR: mismatched types
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//~[msrv, stable, nightly]^^ ERROR: mismatched types
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//~[msrv, stable, nightly]^^^ ERROR: mismatched types
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//~[msrv, stable, nightly]^^^^ ERROR: mismatched types
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//~[msrv, stable, nightly]^^^^^ ERROR: mismatched types
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// `transmute_ref!` does not support transmuting from a non-reference source
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// type.
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const SRC_NOT_A_REFERENCE: &u8 = transmute_ref!(0usize);
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//~[msrv, stable, nightly]^ ERROR: mismatched types
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#[derive(zerocopy::Immutable)]
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#[repr(transparent)]
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struct SrcA(AU16);
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// `transmute_ref` requires that the source type implements `IntoBytes`
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const SRC_NOT_AS_BYTES: &AU16 = transmute_ref!(&SrcA(AU16(0)));
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//~[msrv, stable, nightly]^ ERROR: the trait bound `SrcA: IntoBytes` is not satisfied
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//~[msrv, stable, nightly]^^ ERROR: the trait bound `SrcA: IntoBytes` is not satisfied
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#[derive(zerocopy::IntoBytes)]
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#[repr(transparent)]
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struct SrcB(AU16);
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// `transmute_ref` requires that the source type implements `Immutable`
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const SRC_NOT_IMMUTABLE: &AU16 = transmute_ref!(&SrcB(AU16(0)));
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//~[msrv, stable, nightly]^ ERROR: the trait bound `SrcB: Immutable` is not satisfied
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//~[msrv, stable, nightly]^^ ERROR: the trait bound `SrcB: Immutable` is not satisfied
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// `transmute_ref!` does not support transmuting from an unsized source type.
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const SRC_UNSIZED: &[u8; 1] = transmute_ref!(&[0u8][..]);
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//~[msrv, stable]^ ERROR: the method `transmute_ref` exists for struct `Wrap<&[u8], &[u8; 1]>`, but its trait bounds were not satisfied
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//~[nightly]^^ ERROR: the method `transmute_ref` exists for struct `zerocopy::util::macro_util::Wrap<&[u8], &[u8; 1]>`, but its trait bounds were not satisfied
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