| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/bytemuck-1.13.1/src/zeroable.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>zeroable.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../bytemuck/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../bytemuck/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="doccomment">/// Trait for types that can be safely created with |
| /// [`zeroed`](core::mem::zeroed). |
| /// |
| /// An all-zeroes value may or may not be the same value as the |
| /// [Default](core::default::Default) value of the type. |
| /// |
| /// ## Safety |
| /// |
| /// * Your type must be inhabited (eg: no |
| /// [Infallible](core::convert::Infallible)). |
| /// * Your type must be allowed to be an "all zeroes" bit pattern (eg: no |
| /// [`NonNull<T>`](core::ptr::NonNull)). |
| /// |
| /// ## Features |
| /// |
| /// Some `impl`s are feature gated due to the MSRV policy: |
| /// |
| /// * `MaybeUninit<T>` was not available in 1.34.0, but is available under the |
| /// `zeroable_maybe_uninit` feature flag. |
| /// * `Atomic*` types require Rust 1.60.0 or later to work on certain platforms, but is available |
| /// under the `zeroable_atomics` feature flag. |
| /// * `[T; N]` for arbitrary `N` requires the `min_const_generics` feature flag. |
| </span><span class="kw">pub unsafe trait </span>Zeroable: Sized { |
| <span class="doccomment">/// Calls [`zeroed`](core::mem::zeroed). |
| /// |
| /// This is a trait method so that you can write `MyType::zeroed()` in your |
| /// code. It is a contract of this trait that if you implement it on your type |
| /// you **must not** override this method. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>zeroed() -> <span class="self">Self </span>{ |
| <span class="kw">unsafe </span>{ core::mem::zeroed() } |
| } |
| } |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>() {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>bool {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>char {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>u8 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>i8 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>u16 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>i16 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>u32 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>i32 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>u64 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>i64 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>usize {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>isize {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>u128 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>i128 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>f32 {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>f64 {} |
| <span class="kw">unsafe impl</span><T: Zeroable> Zeroable <span class="kw">for </span>Wrapping<T> {} |
| <span class="kw">unsafe impl</span><T: Zeroable> Zeroable <span class="kw">for </span>core::cmp::Reverse<T> {} |
| |
| <span class="comment">// Note: we can't implement this for all `T: ?Sized` types because it would |
| // create NULL pointers for vtables. |
| // Maybe one day this could be changed to be implemented for |
| // `T: ?Sized where <T as core::ptr::Pointee>::Metadata: Zeroable`. |
| </span><span class="kw">unsafe impl</span><T> Zeroable <span class="kw">for </span><span class="kw-2">*mut </span>T {} |
| <span class="kw">unsafe impl</span><T> Zeroable <span class="kw">for </span><span class="kw-2">*const </span>T {} |
| <span class="kw">unsafe impl</span><T> Zeroable <span class="kw">for </span><span class="kw-2">*mut </span>[T] {} |
| <span class="kw">unsafe impl</span><T> Zeroable <span class="kw">for </span><span class="kw-2">*const </span>[T] {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span><span class="kw-2">*mut </span>str {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span><span class="kw-2">*const </span>str {} |
| |
| <span class="kw">unsafe impl</span><T: <span class="question-mark">?</span>Sized> Zeroable <span class="kw">for </span>PhantomData<T> {} |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>PhantomPinned {} |
| <span class="kw">unsafe impl</span><T: Zeroable> Zeroable <span class="kw">for </span>ManuallyDrop<T> {} |
| <span class="kw">unsafe impl</span><T: Zeroable> Zeroable <span class="kw">for </span>core::cell::UnsafeCell<T> {} |
| <span class="kw">unsafe impl</span><T: Zeroable> Zeroable <span class="kw">for </span>core::cell::Cell<T> {} |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"zeroable_atomics"</span>)] |
| </span><span class="kw">mod </span>atomic_impls { |
| <span class="kw">use </span><span class="kw">super</span>::Zeroable; |
| |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"8"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicBool {} |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"8"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicU8 {} |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"8"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicI8 {} |
| |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"16"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicU16 {} |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"16"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicI16 {} |
| |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"32"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicU32 {} |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"32"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicI32 {} |
| |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"64"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicU64 {} |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"64"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicI64 {} |
| |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"ptr"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicUsize {} |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"ptr"</span>)] |
| </span><span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>core::sync::atomic::AtomicIsize {} |
| |
| <span class="attribute">#[cfg(target_has_atomic = <span class="string">"ptr"</span>)] |
| </span><span class="kw">unsafe impl</span><T> Zeroable <span class="kw">for </span>core::sync::atomic::AtomicPtr<T> {} |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"zeroable_maybe_uninit"</span>)] |
| </span><span class="kw">unsafe impl</span><T> Zeroable <span class="kw">for </span>core::mem::MaybeUninit<T> {} |
| |
| <span class="kw">unsafe impl</span><A: Zeroable> Zeroable <span class="kw">for </span>(A,) {} |
| <span class="kw">unsafe impl</span><A: Zeroable, B: Zeroable> Zeroable <span class="kw">for </span>(A, B) {} |
| <span class="kw">unsafe impl</span><A: Zeroable, B: Zeroable, C: Zeroable> Zeroable <span class="kw">for </span>(A, B, C) {} |
| <span class="kw">unsafe impl</span><A: Zeroable, B: Zeroable, C: Zeroable, D: Zeroable> Zeroable |
| <span class="kw">for </span>(A, B, C, D) |
| { |
| } |
| <span class="kw">unsafe impl</span><A: Zeroable, B: Zeroable, C: Zeroable, D: Zeroable, E: Zeroable> |
| Zeroable <span class="kw">for </span>(A, B, C, D, E) |
| { |
| } |
| <span class="kw">unsafe impl</span>< |
| A: Zeroable, |
| B: Zeroable, |
| C: Zeroable, |
| D: Zeroable, |
| E: Zeroable, |
| F: Zeroable, |
| > Zeroable <span class="kw">for </span>(A, B, C, D, E, F) |
| { |
| } |
| <span class="kw">unsafe impl</span>< |
| A: Zeroable, |
| B: Zeroable, |
| C: Zeroable, |
| D: Zeroable, |
| E: Zeroable, |
| F: Zeroable, |
| G: Zeroable, |
| > Zeroable <span class="kw">for </span>(A, B, C, D, E, F, G) |
| { |
| } |
| <span class="kw">unsafe impl</span>< |
| A: Zeroable, |
| B: Zeroable, |
| C: Zeroable, |
| D: Zeroable, |
| E: Zeroable, |
| F: Zeroable, |
| G: Zeroable, |
| H: Zeroable, |
| > Zeroable <span class="kw">for </span>(A, B, C, D, E, F, G, H) |
| { |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"min_const_generics"</span>)] |
| </span><span class="kw">unsafe impl</span><T, <span class="kw">const </span>N: usize> Zeroable <span class="kw">for </span>[T; N] <span class="kw">where </span>T: Zeroable {} |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"min_const_generics"</span>))] |
| </span><span class="macro">impl_unsafe_marker_for_array!</span>( |
| Zeroable, <span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">10</span>, <span class="number">11</span>, <span class="number">12</span>, <span class="number">13</span>, <span class="number">14</span>, <span class="number">15</span>, <span class="number">16</span>, <span class="number">17</span>, <span class="number">18</span>, |
| <span class="number">19</span>, <span class="number">20</span>, <span class="number">21</span>, <span class="number">22</span>, <span class="number">23</span>, <span class="number">24</span>, <span class="number">25</span>, <span class="number">26</span>, <span class="number">27</span>, <span class="number">28</span>, <span class="number">29</span>, <span class="number">30</span>, <span class="number">31</span>, <span class="number">32</span>, <span class="number">48</span>, <span class="number">64</span>, <span class="number">96</span>, <span class="number">128</span>, <span class="number">256</span>, |
| <span class="number">512</span>, <span class="number">1024</span>, <span class="number">2048</span>, <span class="number">4096 |
| </span>); |
| |
| <span class="attribute">#[cfg(all(target_arch = <span class="string">"wasm32"</span>, feature = <span class="string">"wasm_simd"</span>))] |
| </span><span class="macro">impl_unsafe_marker_for_simd!</span>( |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>wasm32::{v128} |
| ); |
| |
| <span class="attribute">#[cfg(all(target_arch = <span class="string">"aarch64"</span>, feature = <span class="string">"aarch64_simd"</span>))] |
| </span><span class="macro">impl_unsafe_marker_for_simd!</span>( |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>aarch64::{ |
| float32x2_t, float32x2x2_t, float32x2x3_t, float32x2x4_t, float32x4_t, |
| float32x4x2_t, float32x4x3_t, float32x4x4_t, float64x1_t, float64x1x2_t, |
| float64x1x3_t, float64x1x4_t, float64x2_t, float64x2x2_t, float64x2x3_t, |
| float64x2x4_t, int16x4_t, int16x4x2_t, int16x4x3_t, int16x4x4_t, int16x8_t, |
| int16x8x2_t, int16x8x3_t, int16x8x4_t, int32x2_t, int32x2x2_t, int32x2x3_t, |
| int32x2x4_t, int32x4_t, int32x4x2_t, int32x4x3_t, int32x4x4_t, int64x1_t, |
| int64x1x2_t, int64x1x3_t, int64x1x4_t, int64x2_t, int64x2x2_t, int64x2x3_t, |
| int64x2x4_t, int8x16_t, int8x16x2_t, int8x16x3_t, int8x16x4_t, int8x8_t, |
| int8x8x2_t, int8x8x3_t, int8x8x4_t, poly16x4_t, poly16x4x2_t, poly16x4x3_t, |
| poly16x4x4_t, poly16x8_t, poly16x8x2_t, poly16x8x3_t, poly16x8x4_t, |
| poly64x1_t, poly64x1x2_t, poly64x1x3_t, poly64x1x4_t, poly64x2_t, |
| poly64x2x2_t, poly64x2x3_t, poly64x2x4_t, poly8x16_t, poly8x16x2_t, |
| poly8x16x3_t, poly8x16x4_t, poly8x8_t, poly8x8x2_t, poly8x8x3_t, poly8x8x4_t, |
| uint16x4_t, uint16x4x2_t, uint16x4x3_t, uint16x4x4_t, uint16x8_t, |
| uint16x8x2_t, uint16x8x3_t, uint16x8x4_t, uint32x2_t, uint32x2x2_t, |
| uint32x2x3_t, uint32x2x4_t, uint32x4_t, uint32x4x2_t, uint32x4x3_t, |
| uint32x4x4_t, uint64x1_t, uint64x1x2_t, uint64x1x3_t, uint64x1x4_t, |
| uint64x2_t, uint64x2x2_t, uint64x2x3_t, uint64x2x4_t, uint8x16_t, |
| uint8x16x2_t, uint8x16x3_t, uint8x16x4_t, uint8x8_t, uint8x8x2_t, |
| uint8x8x3_t, uint8x8x4_t, |
| } |
| ); |
| |
| <span class="attribute">#[cfg(target_arch = <span class="string">"x86"</span>)] |
| </span><span class="macro">impl_unsafe_marker_for_simd!</span>( |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>x86::{ |
| __m128i, __m128, __m128d, |
| __m256i, __m256, __m256d, |
| } |
| ); |
| |
| <span class="attribute">#[cfg(target_arch = <span class="string">"x86_64"</span>)] |
| </span><span class="macro">impl_unsafe_marker_for_simd!</span>( |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>x86_64::{ |
| __m128i, __m128, __m128d, |
| __m256i, __m256, __m256d, |
| } |
| ); |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"nightly_portable_simd"</span>)] |
| </span><span class="kw">unsafe impl</span><T, <span class="kw">const </span>N: usize> Zeroable <span class="kw">for </span>core::simd::Simd<T, N> |
| <span class="kw">where |
| </span>T: core::simd::SimdElement + Zeroable, |
| core::simd::LaneCount<N>: core::simd::SupportedLaneCount, |
| { |
| } |
| |
| <span class="attribute">#[cfg(all(target_arch = <span class="string">"x86"</span>, feature = <span class="string">"nightly_stdsimd"</span>))] |
| </span><span class="macro">impl_unsafe_marker_for_simd!</span>( |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>x86::{ |
| __m128bh, __m256bh, __m512, |
| __m512bh, __m512d, __m512i, |
| } |
| ); |
| |
| <span class="attribute">#[cfg(all(target_arch = <span class="string">"x86_64"</span>, feature = <span class="string">"nightly_stdsimd"</span>))] |
| </span><span class="macro">impl_unsafe_marker_for_simd!</span>( |
| <span class="kw">unsafe impl </span>Zeroable <span class="kw">for </span>x86_64::{ |
| __m128bh, __m256bh, __m512, |
| __m512bh, __m512d, __m512i, |
| } |
| ); |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="bytemuck" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |