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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="An extension trait which adds utility methods to `AsyncBufRead` types."><title>AsyncBufReadExt in futures_util::io - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="futures_util" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">AsyncBufReadExt</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../futures_util/index.html">futures_<wbr>util</a><span class="version">0.3.32</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Async<wbr>BufRead<wbr>Ext</a></h2><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.consume_unpin" title="consume_unpin">consume_unpin</a></li><li><a href="#method.fill_buf" title="fill_buf">fill_buf</a></li><li><a href="#method.lines" title="lines">lines</a></li><li><a href="#method.read_line" title="read_line">read_line</a></li><li><a href="#method.read_until" title="read_until">read_until</a></li></ul><h3><a href="#dyn-compatibility">Dyn Compatibility</a></h3><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In futures_<wbr>util::<wbr>io</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">futures_util</a>::<wbr><a href="index.html">io</a></div><h1>Trait <span class="trait">Async<wbr>BufRead<wbr>Ext</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/futures_util/io/mod.rs.html#615-814">Source</a> </span></div><pre class="rust item-decl"><code>pub trait AsyncBufReadExt: <a class="trait" href="trait.AsyncBufRead.html" title="trait futures_util::io::AsyncBufRead">AsyncBufRead</a> {
// Provided methods
fn <a href="#method.fill_buf" class="fn">fill_buf</a>(&amp;mut self) -&gt; <a class="struct" href="struct.FillBuf.html" title="struct futures_util::io::FillBuf">FillBuf</a>&lt;'_, Self&gt; <a href="#" class="tooltip" data-notable-ty="FillBuf&lt;&#39;_, Self&gt;"></a>
<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.consume_unpin" class="fn">consume_unpin</a>(&amp;mut self, amt: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.usize.html">usize</a>)
<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.read_until" class="fn">read_until</a>&lt;'a&gt;(
&amp;'a mut self,
byte: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>,
buf: &amp;'a mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>&gt;,
) -&gt; <a class="struct" href="struct.ReadUntil.html" title="struct futures_util::io::ReadUntil">ReadUntil</a>&lt;'a, Self&gt; <a href="#" class="tooltip" data-notable-ty="ReadUntil&lt;&#39;a, Self&gt;"></a>
<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.read_line" class="fn">read_line</a>&lt;'a&gt;(&amp;'a mut self, buf: &amp;'a mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -&gt; <a class="struct" href="struct.ReadLine.html" title="struct futures_util::io::ReadLine">ReadLine</a>&lt;'a, Self&gt; <a href="#" class="tooltip" data-notable-ty="ReadLine&lt;&#39;a, Self&gt;"></a>
<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a></span> { ... }
<span class="item-spacer"></span> fn <a href="#method.lines" class="fn">lines</a>(self) -&gt; <a class="struct" href="struct.Lines.html" title="struct futures_util::io::Lines">Lines</a>&lt;Self&gt;
<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span> { ... }
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An extension trait which adds utility methods to <code>AsyncBufRead</code> types.</p>
</div></details><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.fill_buf" class="method"><a class="src rightside" href="../../src/futures_util/io/mod.rs.html#639-644">Source</a><h4 class="code-header">fn <a href="#method.fill_buf" class="fn">fill_buf</a>(&amp;mut self) -&gt; <a class="struct" href="struct.FillBuf.html" title="struct futures_util::io::FillBuf">FillBuf</a>&lt;'_, Self&gt; <a href="#" class="tooltip" data-notable-ty="FillBuf&lt;&#39;_, Self&gt;"></a><div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h4></section></summary><div class="docblock"><p>Creates a future which will wait for a non-empty buffer to be available from this I/O
object or EOF to be reached.</p>
<p>This method is the async equivalent to <a href="https://doc.rust-lang.org/1.93.1/std/io/trait.BufRead.html#tymethod.fill_buf" title="method std::io::BufRead::fill_buf"><code>BufRead::fill_buf</code></a>.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>futures::{io::AsyncBufReadExt <span class="kw">as _</span>, stream::{iter, TryStreamExt <span class="kw">as _</span>}};
<span class="kw">let </span><span class="kw-2">mut </span>stream = iter(<span class="macro">vec!</span>[<span class="prelude-val">Ok</span>(<span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]), <span class="prelude-val">Ok</span>(<span class="macro">vec!</span>[<span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>])]).into_async_read();
<span class="macro">assert_eq!</span>(stream.fill_buf().<span class="kw">await</span><span class="question-mark">?</span>, <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]);
stream.consume_unpin(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(stream.fill_buf().<span class="kw">await</span><span class="question-mark">?</span>, <span class="macro">vec!</span>[<span class="number">3</span>]);
stream.consume_unpin(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(stream.fill_buf().<span class="kw">await</span><span class="question-mark">?</span>, <span class="macro">vec!</span>[<span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]);
stream.consume_unpin(<span class="number">3</span>);
<span class="macro">assert_eq!</span>(stream.fill_buf().<span class="kw">await</span><span class="question-mark">?</span>, <span class="macro">vec!</span>[]);</code></pre></div></div></details><details class="toggle method-toggle" open><summary><section id="method.consume_unpin" class="method"><a class="src rightside" href="../../src/futures_util/io/mod.rs.html#663-668">Source</a><h4 class="code-header">fn <a href="#method.consume_unpin" class="fn">consume_unpin</a>(&amp;mut self, amt: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.usize.html">usize</a>)<div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h4></section></summary><div class="docblock"><p>A convenience for calling <a href="trait.AsyncBufRead.html#tymethod.consume" title="method futures_util::io::AsyncBufRead::consume"><code>AsyncBufRead::consume</code></a> on <a href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin"><code>Unpin</code></a> IO types.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>futures::{io::AsyncBufReadExt <span class="kw">as _</span>, stream::{iter, TryStreamExt <span class="kw">as _</span>}};
<span class="kw">let </span><span class="kw-2">mut </span>stream = iter(<span class="macro">vec!</span>[<span class="prelude-val">Ok</span>(<span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>])]).into_async_read();
<span class="macro">assert_eq!</span>(stream.fill_buf().<span class="kw">await</span><span class="question-mark">?</span>, <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]);
stream.consume_unpin(<span class="number">2</span>);
<span class="macro">assert_eq!</span>(stream.fill_buf().<span class="kw">await</span><span class="question-mark">?</span>, <span class="macro">vec!</span>[<span class="number">3</span>]);
stream.consume_unpin(<span class="number">1</span>);
<span class="macro">assert_eq!</span>(stream.fill_buf().<span class="kw">await</span><span class="question-mark">?</span>, <span class="macro">vec!</span>[]);</code></pre></div></div></details><details class="toggle method-toggle" open><summary><section id="method.read_until" class="method"><a class="src rightside" href="../../src/futures_util/io/mod.rs.html#711-716">Source</a><h4 class="code-header">fn <a href="#method.read_until" class="fn">read_until</a>&lt;'a&gt;(
&amp;'a mut self,
byte: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>,
buf: &amp;'a mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.u8.html">u8</a>&gt;,
) -&gt; <a class="struct" href="struct.ReadUntil.html" title="struct futures_util::io::ReadUntil">ReadUntil</a>&lt;'a, Self&gt; <a href="#" class="tooltip" data-notable-ty="ReadUntil&lt;&#39;a, Self&gt;"></a><div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h4></section></summary><div class="docblock"><p>Creates a future which will read all the bytes associated with this I/O
object into <code>buf</code> until the delimiter <code>byte</code> or EOF is reached.
This method is the async equivalent to <a href="https://doc.rust-lang.org/1.93.1/std/io/trait.BufRead.html#method.read_until" title="method std::io::BufRead::read_until"><code>BufRead::read_until</code></a>.</p>
<p>This function will read bytes from the underlying stream until the
delimiter or EOF is found. Once found, all bytes up to, and including,
the delimiter (if found) will be appended to <code>buf</code>.</p>
<p>The returned future will resolve to the number of bytes read once the read
operation is completed.</p>
<p>In the case of an error the buffer and the object will be discarded, with
the error yielded.</p>
<h5 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>futures::io::{AsyncBufReadExt, Cursor};
<span class="kw">let </span><span class="kw-2">mut </span>cursor = Cursor::new(<span class="string">b"lorem-ipsum"</span>);
<span class="kw">let </span><span class="kw-2">mut </span>buf = <span class="macro">vec!</span>[];
<span class="comment">// cursor is at 'l'
</span><span class="kw">let </span>num_bytes = cursor.read_until(<span class="string">b'-'</span>, <span class="kw-2">&amp;mut </span>buf).<span class="kw">await</span><span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(num_bytes, <span class="number">6</span>);
<span class="macro">assert_eq!</span>(buf, <span class="string">b"lorem-"</span>);
buf.clear();
<span class="comment">// cursor is at 'i'
</span><span class="kw">let </span>num_bytes = cursor.read_until(<span class="string">b'-'</span>, <span class="kw-2">&amp;mut </span>buf).<span class="kw">await</span><span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(num_bytes, <span class="number">5</span>);
<span class="macro">assert_eq!</span>(buf, <span class="string">b"ipsum"</span>);
buf.clear();
<span class="comment">// cursor is at EOF
</span><span class="kw">let </span>num_bytes = cursor.read_until(<span class="string">b'-'</span>, <span class="kw-2">&amp;mut </span>buf).<span class="kw">await</span><span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(num_bytes, <span class="number">0</span>);
<span class="macro">assert_eq!</span>(buf, <span class="string">b""</span>);</code></pre></div></div></details><details class="toggle method-toggle" open><summary><section id="method.read_line" class="method"><a class="src rightside" href="../../src/futures_util/io/mod.rs.html#769-774">Source</a><h4 class="code-header">fn <a href="#method.read_line" class="fn">read_line</a>&lt;'a&gt;(&amp;'a mut self, buf: &amp;'a mut <a class="struct" href="https://doc.rust-lang.org/1.93.1/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -&gt; <a class="struct" href="struct.ReadLine.html" title="struct futures_util::io::ReadLine">ReadLine</a>&lt;'a, Self&gt; <a href="#" class="tooltip" data-notable-ty="ReadLine&lt;&#39;a, Self&gt;"></a><div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</div></h4></section></summary><div class="docblock"><p>Creates a future which will read all the bytes associated with this I/O
object into <code>buf</code> until a newline (the 0xA byte) or EOF is reached,
This method is the async equivalent to <a href="https://doc.rust-lang.org/1.93.1/std/io/trait.BufRead.html#method.read_line" title="method std::io::BufRead::read_line"><code>BufRead::read_line</code></a>.</p>
<p>This function will read bytes from the underlying stream until the
newline delimiter (the 0xA byte) or EOF is found. Once found, all bytes
up to, and including, the delimiter (if found) will be appended to
<code>buf</code>.</p>
<p>The returned future will resolve to the number of bytes read once the read
operation is completed.</p>
<p>In the case of an error the buffer and the object will be discarded, with
the error yielded.</p>
<h5 id="errors"><a class="doc-anchor" href="#errors">§</a>Errors</h5>
<p>This function has the same error semantics as <a href="trait.AsyncBufReadExt.html#method.read_until" title="method futures_util::io::AsyncBufReadExt::read_until"><code>read_until</code></a> and will
also return an error if the read bytes are not valid UTF-8. If an I/O
error is encountered then <code>buf</code> may contain some bytes already read in
the event that all data read so far was valid UTF-8.</p>
<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>futures::io::{AsyncBufReadExt, Cursor};
<span class="kw">let </span><span class="kw-2">mut </span>cursor = Cursor::new(<span class="string">b"foo\nbar"</span>);
<span class="kw">let </span><span class="kw-2">mut </span>buf = String::new();
<span class="comment">// cursor is at 'f'
</span><span class="kw">let </span>num_bytes = cursor.read_line(<span class="kw-2">&amp;mut </span>buf).<span class="kw">await</span><span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(num_bytes, <span class="number">4</span>);
<span class="macro">assert_eq!</span>(buf, <span class="string">"foo\n"</span>);
buf.clear();
<span class="comment">// cursor is at 'b'
</span><span class="kw">let </span>num_bytes = cursor.read_line(<span class="kw-2">&amp;mut </span>buf).<span class="kw">await</span><span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(num_bytes, <span class="number">3</span>);
<span class="macro">assert_eq!</span>(buf, <span class="string">"bar"</span>);
buf.clear();
<span class="comment">// cursor is at EOF
</span><span class="kw">let </span>num_bytes = cursor.read_line(<span class="kw-2">&amp;mut </span>buf).<span class="kw">await</span><span class="question-mark">?</span>;
<span class="macro">assert_eq!</span>(num_bytes, <span class="number">0</span>);
<span class="macro">assert_eq!</span>(buf, <span class="string">""</span>);</code></pre></div></div></details><details class="toggle method-toggle" open><summary><section id="method.lines" class="method"><a class="src rightside" href="../../src/futures_util/io/mod.rs.html#808-813">Source</a><h4 class="code-header">fn <a href="#method.lines" class="fn">lines</a>(self) -&gt; <a class="struct" href="struct.Lines.html" title="struct futures_util::io::Lines">Lines</a>&lt;Self&gt;<div class="where">where
Self: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><div class="docblock"><p>Returns a stream over the lines of this reader.
This method is the async equivalent to <a href="https://doc.rust-lang.org/1.93.1/std/io/trait.BufRead.html#method.lines" title="method std::io::BufRead::lines"><code>BufRead::lines</code></a>.</p>
<p>The stream returned from this function will yield instances of
<a href="https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html" title="type std::io::error::Result"><code>io::Result</code></a><code>&lt;</code><a href="https://doc.rust-lang.org/1.93.1/alloc/string/struct.String.html" title="struct alloc::string::String"><code>String</code></a><code>&gt;</code>. Each string returned will <em>not</em> have a newline
byte (the 0xA byte) or CRLF (0xD, 0xA bytes) at the end.</p>
<h5 id="errors-1"><a class="doc-anchor" href="#errors-1">§</a>Errors</h5>
<p>Each line of the stream has the same error semantics as <a href="trait.AsyncBufReadExt.html#method.read_line" title="method futures_util::io::AsyncBufReadExt::read_line"><code>AsyncBufReadExt::read_line</code></a>.</p>
<h5 id="examples-2"><a class="doc-anchor" href="#examples-2">§</a>Examples</h5>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>futures::io::{AsyncBufReadExt, Cursor};
<span class="kw">use </span>futures::stream::StreamExt;
<span class="kw">let </span>cursor = Cursor::new(<span class="string">b"lorem\nipsum\xc2\r\ndolor"</span>);
<span class="kw">let </span><span class="kw-2">mut </span>lines_stream = cursor.lines().map(|l| l.unwrap_or(String::from(<span class="string">"invalid UTF_8"</span>)));
<span class="macro">assert_eq!</span>(lines_stream.next().<span class="kw">await</span>, <span class="prelude-val">Some</span>(String::from(<span class="string">"lorem"</span>)));
<span class="macro">assert_eq!</span>(lines_stream.next().<span class="kw">await</span>, <span class="prelude-val">Some</span>(String::from(<span class="string">"invalid UTF_8"</span>)));
<span class="macro">assert_eq!</span>(lines_stream.next().<span class="kw">await</span>, <span class="prelude-val">Some</span>(String::from(<span class="string">"dolor"</span>)));
<span class="macro">assert_eq!</span>(lines_stream.next().<span class="kw">await</span>, <span class="prelude-val">None</span>);</code></pre></div></div></details></div><h2 id="dyn-compatibility" class="section-header">Dyn Compatibility<a href="#dyn-compatibility" class="anchor">§</a></h2><div class="dyn-compatibility-info"><p>This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.93.1/reference/items/traits.html#dyn-compatibility">dyn compatible</a>.</p><p><i>In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.</i></p></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-AsyncBufReadExt-for-R" class="impl"><a class="src rightside" href="../../src/futures_util/io/mod.rs.html#816">Source</a><a href="#impl-AsyncBufReadExt-for-R" class="anchor">§</a><h3 class="code-header">impl&lt;R: <a class="trait" href="trait.AsyncBufRead.html" title="trait futures_util::io::AsyncBufRead">AsyncBufRead</a> + ?<a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>&gt; <a class="trait" href="trait.AsyncBufReadExt.html" title="trait futures_util::io::AsyncBufReadExt">AsyncBufReadExt</a> for R</h3></section></div><script src="../../trait.impl/futures_util/io/trait.AsyncBufReadExt.js" async></script><script type="text/json" id="notable-traits-data">{"FillBuf<'_, Self>":"<h3>Notable traits for <code><a class=\"struct\" href=\"struct.FillBuf.html\" title=\"struct futures_util::io::FillBuf\">FillBuf</a>&lt;'a, R&gt;</code></h3><pre><code><div class=\"where\">impl&lt;'a, R&gt; <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a> for <a class=\"struct\" href=\"struct.FillBuf.html\" title=\"struct futures_util::io::FillBuf\">FillBuf</a>&lt;'a, R&gt;<div class=\"where\">where\n R: <a class=\"trait\" href=\"trait.AsyncBufRead.html\" title=\"trait futures_util::io::AsyncBufRead\">AsyncBufRead</a> + ?<a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html\" title=\"trait core::marker::Sized\">Sized</a> + <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html\" title=\"trait core::marker::Unpin\">Unpin</a>,</div></div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html#associatedtype.Output\" class=\"associatedtype\">Output</a> = <a class=\"type\" href=\"https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html\" title=\"type std::io::error::Result\">Result</a>&lt;&amp;'a [<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.93.1/std/primitive.u8.html\">u8</a>]&gt;;</div>","ReadLine<'a, Self>":"<h3>Notable traits for <code><a class=\"struct\" href=\"struct.ReadLine.html\" title=\"struct futures_util::io::ReadLine\">ReadLine</a>&lt;'_, R&gt;</code></h3><pre><code><div class=\"where\">impl&lt;R: <a class=\"trait\" href=\"trait.AsyncBufRead.html\" title=\"trait futures_util::io::AsyncBufRead\">AsyncBufRead</a> + ?<a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html\" title=\"trait core::marker::Sized\">Sized</a> + <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html\" title=\"trait core::marker::Unpin\">Unpin</a>&gt; <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a> for <a class=\"struct\" href=\"struct.ReadLine.html\" title=\"struct futures_util::io::ReadLine\">ReadLine</a>&lt;'_, R&gt;</div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html#associatedtype.Output\" class=\"associatedtype\">Output</a> = <a class=\"type\" href=\"https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html\" title=\"type std::io::error::Result\">Result</a>&lt;<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.93.1/std/primitive.usize.html\">usize</a>&gt;;</div>","ReadUntil<'a, Self>":"<h3>Notable traits for <code><a class=\"struct\" href=\"struct.ReadUntil.html\" title=\"struct futures_util::io::ReadUntil\">ReadUntil</a>&lt;'_, R&gt;</code></h3><pre><code><div class=\"where\">impl&lt;R: <a class=\"trait\" href=\"trait.AsyncBufRead.html\" title=\"trait futures_util::io::AsyncBufRead\">AsyncBufRead</a> + ?<a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html\" title=\"trait core::marker::Sized\">Sized</a> + <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/marker/trait.Unpin.html\" title=\"trait core::marker::Unpin\">Unpin</a>&gt; <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a> for <a class=\"struct\" href=\"struct.ReadUntil.html\" title=\"struct futures_util::io::ReadUntil\">ReadUntil</a>&lt;'_, R&gt;</div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html#associatedtype.Output\" class=\"associatedtype\">Output</a> = <a class=\"type\" href=\"https://doc.rust-lang.org/1.93.1/std/io/error/type.Result.html\" title=\"type std::io::error::Result\">Result</a>&lt;<a class=\"primitive\" href=\"https://doc.rust-lang.org/1.93.1/std/primitive.usize.html\">usize</a>&gt;;</div>"}</script></section></div></main></body></html>