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<!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="The virtio block device is a simple virtual block device (ie. disk)."><meta name="keywords" content="rust, rustlang, rust-lang, VirtIOBlk"><title>VirtIOBlk in virtio_drivers - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script src="../crates.js"></script><script defer src="../main.js"></script>
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<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 struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../virtio_drivers/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div>
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</a><h2 class="location"></h2>
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</nav>
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<nav class="sidebar"><a class="sidebar-logo" href="../virtio_drivers/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div>
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</a><h2 class="location"><a href="#">VirtIOBlk</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#implementations">Methods</a></h3><ul><li><a href="#method.ack_interrupt">ack_interrupt</a></li><li><a href="#method.new">new</a></li><li><a href="#method.pop_used">pop_used</a></li><li><a href="#method.read_block">read_block</a></li><li><a href="#method.read_block_nb">read_block_nb</a></li><li><a href="#method.virt_queue_size">virt_queue_size</a></li><li><a href="#method.write_block">write_block</a></li><li><a href="#method.write_block_nb">write_block_nb</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul><li><a href="#impl-RefUnwindSafe">RefUnwindSafe</a></li><li><a href="#impl-Send">Send</a></li><li><a href="#impl-Sync">Sync</a></li><li><a href="#impl-Unpin">Unpin</a></li><li><a href="#impl-UnwindSafe">!UnwindSafe</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#blanket-implementations">Blanket Implementations</a></h3><ul><li><a href="#impl-Any">Any</a></li><li><a href="#impl-Borrow%3CT%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E">From<T></a></li><li><a href="#impl-Into%3CU%3E">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E">TryInto<U></a></li></ul></div></section><h2 class="location"><a href="index.html">In virtio_drivers</a></h2><div id="sidebar-vars" data-name="VirtIOBlk" data-ty="struct" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../virtio_drivers/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><div class="theme-picker hidden"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="22" height="22" alt="Pick another theme!" src="../brush.svg"></button><div id="theme-choices" role="menu"></div></div><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"><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="main-heading">
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<h1 class="fqn"><span class="in-band">Struct <a href="index.html">virtio_drivers</a>::<wbr><a class="struct" href="#">VirtIOBlk</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#13-17">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust struct"><code>pub struct VirtIOBlk<'a> { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>The virtio block device is a simple virtual block device (ie. disk).</p>
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<p>Read and write requests (and other exotic requests) are placed in the queue,
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and serviced (probably out of order) by the device except where noted.</p>
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</div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#19-186">source</a></span><a href="#impl" class="anchor"></a><h3 class="code-header in-band">impl <a class="struct" href="struct.VirtIOBlk.html" title="struct virtio_drivers::VirtIOBlk">VirtIOBlk</a><'_></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.new" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#21-46">source</a></span><a href="#method.new" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a>(header: &'static mut <a class="struct" href="struct.VirtIOHeader.html" title="struct virtio_drivers::VirtIOHeader">VirtIOHeader</a>) -> <a class="type" href="type.Result.html" title="type virtio_drivers::Result">Result</a><Self></h4></section></summary><div class="docblock"><p>Create a new VirtIO-Blk driver.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.ack_interrupt" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#49-51">source</a></span><a href="#method.ack_interrupt" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.ack_interrupt" class="fnname">ack_interrupt</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Acknowledge interrupt.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_block" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#54-72">source</a></span><a href="#method.read_block" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.read_block" class="fnname">read_block</a>(&mut self, block_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a>, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">&mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">]</a>) -> <a class="type" href="type.Result.html" title="type virtio_drivers::Result">Result</a></h4></section></summary><div class="docblock"><p>Read a block.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.read_block_nb" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#102-117">source</a></span><a href="#method.read_block_nb" class="anchor"></a><h4 class="code-header">pub unsafe fn <a href="#method.read_block_nb" class="fnname">read_block_nb</a>(<br> &mut self, <br> block_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a>, <br> buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">&mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">]</a>, <br> resp: &mut <a class="struct" href="struct.BlkResp.html" title="struct virtio_drivers::BlkResp">BlkResp</a><br>) -> <a class="type" href="type.Result.html" title="type virtio_drivers::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u16.html">u16</a>></h4></section></summary><div class="docblock"><p>Read a block in a non-blocking way which means that it returns immediately.</p>
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<h5 id="arguments"><a href="#arguments">Arguments</a></h5>
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<ul>
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<li><code>block_id</code> - The identifier of the block to read.</li>
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<li><code>buf</code> - The buffer in the memory which the block is read into.</li>
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<li><code>resp</code> - A mutable reference to a variable provided by the caller
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which contains the status of the requests. The caller can safely
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read the variable only after the request is ready.</li>
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</ul>
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<h5 id="usage"><a href="#usage">Usage</a></h5>
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<p>It will submit request to the virtio block device and return a token identifying
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the position of the first Descriptor in the chain. If there are not enough
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Descriptors to allocate, then it returns <a href="enum.Error.html#variant.BufferTooSmall" title="Error::BufferTooSmall">Error::BufferTooSmall</a>.</p>
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<p>After the request is ready, <code>resp</code> will be updated and the caller can get the
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status of the request(e.g. succeed or failed) through it. However, the caller
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<strong>must not</strong> spin on <code>resp</code> to wait for it to change. A safe way is to read it
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after the same token as this method returns is fetched through <a href="struct.VirtIOBlk.html#method.pop_used" title="VirtIOBlk::pop_used()">VirtIOBlk::pop_used()</a>,
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which means that the request has been ready.</p>
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<h5 id="safety"><a href="#safety">Safety</a></h5>
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<p><code>buf</code> is still borrowed by the underlying virtio block device even if this
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method returns. Thus, it is the caller’s responsibility to guarantee that
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<code>buf</code> is not accessed before the request is completed in order to avoid
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data races.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write_block" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#120-138">source</a></span><a href="#method.write_block" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.write_block" class="fnname">write_block</a>(&mut self, block_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a>, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">]</a>) -> <a class="type" href="type.Result.html" title="type virtio_drivers::Result">Result</a></h4></section></summary><div class="docblock"><p>Write a block.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.write_block_nb" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#157-172">source</a></span><a href="#method.write_block_nb" class="anchor"></a><h4 class="code-header">pub unsafe fn <a href="#method.write_block_nb" class="fnname">write_block_nb</a>(<br> &mut self, <br> block_id: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a>, <br> buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.slice.html">]</a>, <br> resp: &mut <a class="struct" href="struct.BlkResp.html" title="struct virtio_drivers::BlkResp">BlkResp</a><br>) -> <a class="type" href="type.Result.html" title="type virtio_drivers::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u16.html">u16</a>></h4></section></summary><div class="docblock"><h5 id="arguments-1"><a href="#arguments-1">Arguments</a></h5>
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<ul>
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<li><code>block_id</code> - The identifier of the block to write.</li>
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<li><code>buf</code> - The buffer in the memory containing the data to write to the block.</li>
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<li><code>resp</code> - A mutable reference to a variable provided by the caller
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which contains the status of the requests. The caller can safely
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read the variable only after the request is ready.</li>
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</ul>
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<h5 id="usage-1"><a href="#usage-1">Usage</a></h5>
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<p>See also <a href="struct.VirtIOBlk.html#method.read_block_nb" title="VirtIOBlk::read_block_nb()">VirtIOBlk::read_block_nb()</a>.</p>
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<h5 id="safety-1"><a href="#safety-1">Safety</a></h5>
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<p>See also <a href="struct.VirtIOBlk.html#method.read_block_nb" title="VirtIOBlk::read_block_nb()">VirtIOBlk::read_block_nb()</a>.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.pop_used" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#177-179">source</a></span><a href="#method.pop_used" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.pop_used" class="fnname">pop_used</a>(&mut self) -> <a class="type" href="type.Result.html" title="type virtio_drivers::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u16.html">u16</a>></h4></section></summary><div class="docblock"><p>During an interrupt, it fetches a token of a completed request from the used
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ring and return it. If all completed requests have already been fetched, return
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Err(Error::NotReady).</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.virt_queue_size" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/virtio_drivers/blk.rs.html#183-185">source</a></span><a href="#method.virt_queue_size" class="anchor"></a><h4 class="code-header">pub fn <a href="#method.virt_queue_size" class="fnname">virt_queue_size</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.u16.html">u16</a></h4></section></summary><div class="docblock"><p>Return size of its VirtQueue.
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It can be used to tell the caller how many channels he should monitor on.</p>
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</div></details></div></details></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe" class="impl has-srclink"><a href="#impl-RefUnwindSafe" class="anchor"></a><h3 class="code-header in-band">impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.VirtIOBlk.html" title="struct virtio_drivers::VirtIOBlk">VirtIOBlk</a><'a></h3></section><section id="impl-Send" class="impl has-srclink"><a href="#impl-Send" class="anchor"></a><h3 class="code-header in-band">impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.VirtIOBlk.html" title="struct virtio_drivers::VirtIOBlk">VirtIOBlk</a><'a></h3></section><section id="impl-Sync" class="impl has-srclink"><a href="#impl-Sync" class="anchor"></a><h3 class="code-header in-band">impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.VirtIOBlk.html" title="struct virtio_drivers::VirtIOBlk">VirtIOBlk</a><'a></h3></section><section id="impl-Unpin" class="impl has-srclink"><a href="#impl-Unpin" class="anchor"></a><h3 class="code-header in-band">impl<'a> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.VirtIOBlk.html" title="struct virtio_drivers::VirtIOBlk">VirtIOBlk</a><'a></h3></section><section id="impl-UnwindSafe" class="impl has-srclink"><a href="#impl-UnwindSafe" class="anchor"></a><h3 class="code-header in-band">impl<'a> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.VirtIOBlk.html" title="struct virtio_drivers::VirtIOBlk">VirtIOBlk</a><'a></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#132-136">source</a></span><a href="#impl-Any" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#133">source</a></span><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#209-214">source</a></span><a href="#impl-Borrow%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#211">source</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&</a>T</h4></section></summary><div class='docblock'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#218-222">source</a></span><a href="#impl-BorrowMut%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#219">source</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.reference.html">&mut </a>T</h4></section></summary><div class='docblock'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#557-562">source</a></span><a href="#impl-From%3CT%3E" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#559">source</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#541-552">source</a></span><a href="#impl-Into%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#549">source</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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<p>That is, this conversion is whatever the implementation of
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<code><a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="From">From</a><T> for U</code> chooses to do.</p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#598-607">source</a></span><a href="#impl-TryFrom%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="type trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#604">source</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#583-592">source</a></span><a href="#impl-TryInto%3CU%3E" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="type trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#589">source</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
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||
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