| <!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="Splitter for the `split` method."><meta name="keywords" content="rust, rustlang, rust-lang, Split"><title>Split in tokio::io - 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" 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href="../../tokio/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../tokio/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">Split</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.next_segment">next_segment</a></li><li><a href="#method.poll_next_segment">poll_next_segment</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Debug-for-Split%3CR%3E">Debug</a></li><li><a href="#impl-Unpin-for-Split%3CR%3E">Unpin</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-Split%3CR%3E">RefUnwindSafe</a></li><li><a href="#impl-Send-for-Split%3CR%3E">Send</a></li><li><a href="#impl-Sync-for-Split%3CR%3E">Sync</a></li><li><a href="#impl-UnwindSafe-for-Split%3CR%3E">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-Split%3CR%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-Split%3CR%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-Split%3CR%3E">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-Split%3CR%3E">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-Split%3CR%3E">Into<U></a></li><li><a href="#impl-TryFrom%3CU%3E-for-Split%3CR%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-Split%3CR%3E">TryInto<U></a></li></ul></section><h2><a href="index.html">In tokio::io</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><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="main-heading"><h1 class="fqn">Struct <a href="../index.html">tokio</a>::<wbr><a href="index.html">io</a>::<wbr><a class="struct" href="#">Split</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></h1><span class="out-of-band"><a class="srclink" href="../../src/tokio/io/util/split.rs.html#10-26">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct Split<R> { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Splitter for the <a href="trait.AsyncBufReadExt.html#method.split"><code>split</code></a> method.</p> |
| <p>A <code>Split</code> can be turned into a <code>Stream</code> with <a href="https://docs.rs/tokio-stream/0.1/tokio_stream/wrappers/struct.SplitStream.html"><code>SplitStream</code></a>.</p> |
| </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-Split%3CR%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/tokio/io/util/split.rs.html#40-66">source</a><a href="#impl-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<R> <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R><span class="where fmt-newline">where<br> R: <a class="trait" href="trait.AsyncBufRead.html" title="trait tokio::io::AsyncBufRead">AsyncBufRead</a> + Unpin,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.next_segment" class="method has-srclink"><a class="srclink rightside" href="../../src/tokio/io/util/split.rs.html#61-65">source</a><h4 class="code-header">pub async fn <a href="#method.next_segment" class="fnname">next_segment</a>(&mut self) -> Result<Option<Vec<u8>>></h4></section></summary><div class="docblock"><p>Returns the next segment in the stream.</p> |
| <h5 id="examples"><a href="#examples">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>tokio::io::AsyncBufReadExt; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>segments = my_buf_read.split(<span class="string">b'f'</span>); |
| |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(segment) = segments.next_segment().<span class="kw">await</span><span class="question-mark">? </span>{ |
| <span class="macro">println!</span>(<span class="string">"length = {}"</span>, segment.len()) |
| }</code></pre></div> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Split%3CR%3E-1" class="impl has-srclink"><a class="srclink rightside" href="../../src/tokio/io/util/split.rs.html#68-111">source</a><a href="#impl-Split%3CR%3E-1" class="anchor"></a><h3 class="code-header">impl<R> <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R><span class="where fmt-newline">where<br> R: <a class="trait" href="trait.AsyncBufRead.html" title="trait tokio::io::AsyncBufRead">AsyncBufRead</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.poll_next_segment" class="method has-srclink"><a class="srclink rightside" href="../../src/tokio/io/util/split.rs.html#89-110">source</a><h4 class="code-header">pub fn <a href="#method.poll_next_segment" class="fnname">poll_next_segment</a>(<br> self: Pin<&mut Self>,<br> cx: &mut Context<'_><br>) -> Poll<Result<Option<Vec<u8>>>></h4></section></summary><div class="docblock"><p>Polls for the next segment in the stream.</p> |
| <p>This method returns:</p> |
| <ul> |
| <li><code>Poll::Pending</code> if the next segment is not yet available.</li> |
| <li><code>Poll::Ready(Ok(Some(segment)))</code> if the next segment is available.</li> |
| <li><code>Poll::Ready(Ok(None))</code> if there are no more segments in this stream.</li> |
| <li><code>Poll::Ready(Err(err))</code> if an IO error occurred while reading the |
| next segment.</li> |
| </ul> |
| <p>When the method returns <code>Poll::Pending</code>, the <code>Waker</code> in the provided |
| <code>Context</code> is scheduled to receive a wakeup when more bytes become |
| available on the underlying IO resource.</p> |
| <p>Note that on multiple calls to <code>poll_next_segment</code>, only the <code>Waker</code> |
| from the <code>Context</code> passed to the most recent call is scheduled to |
| receive a wakeup.</p> |
| </div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-Split%3CR%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/tokio/io/util/split.rs.html#16">source</a><a href="#impl-Debug-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<R: Debug> Debug for <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/tokio/io/util/split.rs.html#16">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a class="fnname">fmt</a>(&self, f: &mut Formatter<'_>) -> Result</h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a>Read more</a></div></details></div></details><section id="impl-Unpin-for-Split%3CR%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/tokio/io/util/split.rs.html#10-26">source</a><a href="#impl-Unpin-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<'__pin, R> Unpin for <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R><span class="where fmt-newline">where<br> __Origin<'__pin, R>: Unpin,</span></h3></section></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-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<R> RefUnwindSafe for <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R><span class="where fmt-newline">where<br> R: RefUnwindSafe,</span></h3></section><section id="impl-Send-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-Send-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<R> Send for <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R><span class="where fmt-newline">where<br> R: Send,</span></h3></section><section id="impl-Sync-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-Sync-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<R> Sync for <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R><span class="where fmt-newline">where<br> R: Sync,</span></h3></section><section id="impl-UnwindSafe-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<R> UnwindSafe for <a class="struct" href="struct.Split.html" title="struct tokio::io::Split">Split</a><R><span class="where fmt-newline">where<br> R: UnwindSafe,</span></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-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-Any-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<T> Any for T<span class="where fmt-newline">where<br> T: 'static + ?Sized,</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"><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a class="fnname">type_id</a>(&self) -> TypeId</h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-Borrow%3CT%3E-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<T> Borrow<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow</a>(&self) -> &T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-BorrowMut%3CT%3E-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<T> BorrowMut<T> for T<span class="where fmt-newline">where<br> T: ?Sized,</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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a class="fnname">borrow_mut</a>(&mut self) -> &mut T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a>Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-From%3CT%3E-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<T> From<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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-Into%3CU%3E-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<T, U> Into<U> for T<span class="where fmt-newline">where<br> U: From<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="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p> |
| <p>That is, this conversion is whatever the implementation of |
| <code>[From]<T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-TryFrom%3CU%3E-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryFrom<U> for T<span class="where fmt-newline">where<br> U: Into<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = Infallible</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_from</a>(value: U) -> Result<T, <T as TryFrom<U>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-Split%3CR%3E" class="impl has-srclink"><a href="#impl-TryInto%3CU%3E-for-Split%3CR%3E" class="anchor"></a><h3 class="code-header">impl<T, U> TryInto<U> for T<span class="where fmt-newline">where<br> U: TryFrom<T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a class="associatedtype">Error</a> = <U as TryFrom<T>>::Error</h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="since rightside" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a class="fnname">try_into</a>(self) -> Result<U, <U as TryFrom<T>>::Error></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="tokio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |