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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="API documentation for the Rust `AsyncBufRead` trait in crate `futures`."><meta name="keywords" content="rust, rustlang, rust-lang, AsyncBufRead"><title>futures::prelude::AsyncBufRead - Rust</title><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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../futures/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Trait AsyncBufRead</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.poll_fill_buf">poll_fill_buf</a><a href="#tymethod.consume">consume</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-AsyncBufRead-for-%26%27_%20%5Bu8%5D">&'_ [u8]</a><a href="#impl-AsyncBufRead-for-%26%27_%20mut%20T">&'_ mut T</a><a href="#impl-AsyncBufRead-for-Box%3CT%2C%20Global%3E">Box<T, Global></a><a href="#impl-AsyncBufRead-for-Pin%3CP%3E">Pin<P></a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class="location"><a href="../index.html">futures</a>::<wbr><a href="index.html">prelude</a></p><div id="sidebar-vars" data-name="AsyncBufRead" data-ty="trait" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Trait <a href="../index.html">futures</a>::<wbr><a href="index.html">prelude</a>::<wbr><a class="trait" href="">AsyncBufRead</a></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../../src/futures_io/lib.rs.html#266-314" title="goto source code">[src]</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class="rust trait">pub trait AsyncBufRead: <a class="trait" href="../../futures/io/trait.AsyncRead.html" title="trait futures::io::AsyncRead">AsyncRead</a> {
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pub fn <a href="#tymethod.poll_fill_buf" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br> ) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>>;
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<div class="item-spacer"></div> pub fn <a href="#tymethod.consume" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>);
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}</pre></div><div class="docblock"><p>Read bytes asynchronously.</p>
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<p>This trait is analogous to the <code>std::io::BufRead</code> trait, but integrates
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with the asynchronous task system. In particular, the <code>poll_fill_buf</code>
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method, unlike <code>BufRead::fill_buf</code>, will automatically queue the current task
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for wakeup and return if data is not yet available, rather than blocking
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the calling thread.</p>
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</div><h2 id="required-methods" class="small-section-header">Required methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><h3 id="tymethod.poll_fill_buf" class="method"><code>pub fn <a href="#tymethod.poll_fill_buf" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_io/lib.rs.html#295-296" title="goto source code">[src]</a></h3><div class="docblock"><p>Attempt to return the contents of the internal buffer, filling it with more data
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from the inner reader if it is empty.</p>
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<p>On success, returns <code>Poll::Ready(Ok(buf))</code>.</p>
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<p>If no data is available for reading, the method returns
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<code>Poll::Pending</code> and arranges for the current task (via
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<code>cx.waker().wake_by_ref()</code>) to receive a notification when the object becomes
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readable or is closed.</p>
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<p>This function is a lower-level call. It needs to be paired with the
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<a href="../../futures/io/trait.AsyncBufRead.html#tymethod.consume"><code>consume</code></a> method to function properly. When calling this
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method, none of the contents will be "read" in the sense that later
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calling <a href="../../futures/io/trait.AsyncRead.html#tymethod.poll_read"><code>poll_read</code></a> may return the same contents. As such, <a href="../../futures/io/trait.AsyncBufRead.html#tymethod.consume"><code>consume</code></a> must
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be called with the number of bytes that are consumed from this buffer to
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ensure that the bytes are never returned twice.</p>
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<p>An empty buffer returned indicates that the stream has reached EOF.</p>
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<h1 id="implementation" class="section-header"><a href="#implementation">Implementation</a></h1>
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<p>This function may not return errors of kind <code>WouldBlock</code> or
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<code>Interrupted</code>. Implementations must convert <code>WouldBlock</code> into
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<code>Poll::Pending</code> and either internally retry or convert
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<code>Interrupted</code> into another error kind.</p>
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</div><h3 id="tymethod.consume" class="method"><code>pub fn <a href="#tymethod.consume" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>Self>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_io/lib.rs.html#313" title="goto source code">[src]</a></h3><div class="docblock"><p>Tells this buffer that <code>amt</code> bytes have been consumed from the buffer,
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so they should no longer be returned in calls to <a href="../../futures/io/trait.AsyncRead.html#tymethod.poll_read"><code>poll_read</code></a>.</p>
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<p>This function is a lower-level call. It needs to be paired with the
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<a href="../../futures/io/trait.AsyncBufRead.html#tymethod.poll_fill_buf"><code>poll_fill_buf</code></a> method to function properly. This function does
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not perform any I/O, it simply informs this object that some amount of
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its buffer, returned from <a href="../../futures/io/trait.AsyncBufRead.html#tymethod.poll_fill_buf"><code>poll_fill_buf</code></a>, has been consumed and should
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no longer be returned. As such, this function may do odd things if
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<a href="../../futures/io/trait.AsyncBufRead.html#tymethod.poll_fill_buf"><code>poll_fill_buf</code></a> isn't called before calling it.</p>
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<p>The <code>amt</code> must be <code><=</code> the number of bytes in the buffer returned by
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<a href="../../futures/io/trait.AsyncBufRead.html#tymethod.poll_fill_buf"><code>poll_fill_buf</code></a>.</p>
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</div></div><span class="loading-content">Loading content...</span><h2 id="foreign-impls" class="small-section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor"></a></h2><h3 id="impl-AsyncBufRead-for-Pin%3CP%3E" class="impl"><code class="in-band">impl<P> <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><P> <span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html" title="trait core::ops::deref::DerefMut">DerefMut</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#associatedtype.Target" title="type core::ops::deref::Deref::Target">Target</a>: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a>, </span></code><a href="#impl-AsyncBufRead-for-Pin%3CP%3E" class="anchor"></a><a class="srclink" href="../../src/futures_io/lib.rs.html#531-545" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><P>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_io/lib.rs.html#536-537" title="goto source code">[src]</a></h4><h4 id="method.consume" class="method hidden"><code>pub fn <a href="#method.consume" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><P>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_io/lib.rs.html#542" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-for-%26%27_%20mut%20T" class="impl"><code class="in-band">impl<'_, T> <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'_ mut </a>T <span class="where fmt-newline">where<br> T: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-AsyncBufRead-for-%26%27_%20mut%20T" class="anchor"></a><a class="srclink" href="../../src/futures_io/lib.rs.html#527-529" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-1" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'_ mut </a>T>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_io/lib.rs.html#528" title="goto source code">[src]</a></h4><h4 id="method.consume-1" class="method hidden"><code>pub fn <a href="#method.consume" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'_ mut </a>T>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_io/lib.rs.html#528" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-for-Box%3CT%2C%20Global%3E" class="impl"><code class="in-band">impl<T> <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><T, <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/alloc/struct.Global.html" title="struct alloc::alloc::Global">Global</a>> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code><a href="#impl-AsyncBufRead-for-Box%3CT%2C%20Global%3E" class="anchor"></a><a class="srclink" href="../../src/futures_io/lib.rs.html#523-525" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-2" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><T, <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/alloc/struct.Global.html" title="struct alloc::alloc::Global">Global</a>>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_io/lib.rs.html#524" title="goto source code">[src]</a></h4><h4 id="method.consume-2" class="method hidden"><code>pub fn <a href="#method.consume" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><T, <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/alloc/struct.Global.html" title="struct alloc::alloc::Global">Global</a>>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_io/lib.rs.html#524" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-for-%26%27_%20%5Bu8%5D" class="impl"><code class="in-band">impl<'_> <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'_ [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a></code><a href="#impl-AsyncBufRead-for-%26%27_%20%5Bu8%5D" class="anchor"></a><a class="srclink" href="../../src/futures_io/lib.rs.html#561-563" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-3" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'_ [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>>, <br> &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_io/lib.rs.html#562" title="goto source code">[src]</a></h4><h4 id="method.consume-3" class="method hidden"><code>pub fn <a href="#method.consume" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'_ [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_io/lib.rs.html#562" title="goto source code">[src]</a></h4></div><span class="loading-content">Loading content...</span><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"><h3 id="impl-AsyncBufRead" class="impl"><code class="in-band">impl AsyncBufRead for <a class="struct" href="../../futures/io/struct.Empty.html" title="struct futures::io::Empty">Empty</a></code><a href="#impl-AsyncBufRead" class="anchor"></a><a class="srclink" href="../../src/futures_util/io/empty.rs.html#54-61" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-4" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-4" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Empty.html" title="struct futures::io::Empty">Empty</a>>, <br> &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/io/empty.rs.html#56" title="goto source code">[src]</a></h4><h4 id="method.consume-4" class="method hidden"><code>pub fn <a href="#method.consume-4" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Empty.html" title="struct futures::io::Empty">Empty</a>>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/io/empty.rs.html#60" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-1" class="impl"><code class="in-band">impl<A, B> AsyncBufRead for <a class="enum" href="../../futures/future/enum.Either.html" title="enum futures::future::Either">Either</a><A, B> <span class="where fmt-newline">where<br> B: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a>,<br> A: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a>, </span></code><a href="#impl-AsyncBufRead-1" class="anchor"></a><a class="srclink" href="../../src/futures_util/future/either.rs.html#271-289" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-5" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-5" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="enum" href="../../futures/future/enum.Either.html" title="enum futures::future::Either">Either</a><A, B>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/future/either.rs.html#276" title="goto source code">[src]</a></h4><h4 id="method.consume-5" class="method hidden"><code>pub fn <a href="#method.consume-5" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="enum" href="../../futures/future/enum.Either.html" title="enum futures::future::Either">Either</a><A, B>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/future/either.rs.html#283" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-2" class="impl"><code class="in-band">impl<R> AsyncBufRead for <a class="struct" href="../../futures/io/struct.BufReader.html" title="struct futures::io::BufReader">BufReader</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../../futures/io/trait.AsyncRead.html" title="trait futures::io::AsyncRead">AsyncRead</a>, </span></code><a href="#impl-AsyncBufRead-2" class="anchor"></a><a class="srclink" href="../../src/futures_util/io/buf_reader.rs.html#125-147" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-6" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-6" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.BufReader.html" title="struct futures::io::BufReader">BufReader</a><R>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/io/buf_reader.rs.html#126-129" title="goto source code">[src]</a></h4><h4 id="method.consume-6" class="method hidden"><code>pub fn <a href="#method.consume-6" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.BufReader.html" title="struct futures::io::BufReader">BufReader</a><R>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/io/buf_reader.rs.html#144" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-3" class="impl"><code class="in-band">impl<R> AsyncBufRead for <a class="struct" href="../../futures/io/struct.Take.html" title="struct futures::io::Take">Take</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a>, </span></code><a href="#impl-AsyncBufRead-3" class="anchor"></a><a class="srclink" href="../../src/futures_util/io/take.rs.html#111-133" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-7" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-7" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Take.html" title="struct futures::io::Take">Take</a><R>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/io/take.rs.html#112" title="goto source code">[src]</a></h4><h4 id="method.consume-7" class="method hidden"><code>pub fn <a href="#method.consume-7" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Take.html" title="struct futures::io::Take">Take</a><R>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/io/take.rs.html#125" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-4" class="impl"><code class="in-band">impl<St> AsyncBufRead for <a class="struct" href="../../futures/stream/struct.IntoAsyncRead.html" title="struct futures::stream::IntoAsyncRead">IntoAsyncRead</a><St> <span class="where fmt-newline">where<br> St: <a class="trait" href="../../futures/stream/trait.TryStream.html" title="trait futures::stream::TryStream">TryStream</a><Error = <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,<br> <St as <a class="trait" href="../../futures/stream/trait.TryStream.html" title="trait futures::stream::TryStream">TryStream</a>>::<a class="type" href="../../futures/stream/trait.TryStream.html#associatedtype.Ok" title="type futures::stream::TryStream::Ok">Ok</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>>, </span></code><a href="#impl-AsyncBufRead-4" class="anchor"></a><a class="srclink" href="../../src/futures_util/stream/try_stream/into_async_read.rs.html#133-188" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-8" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-8" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/stream/struct.IntoAsyncRead.html" title="struct futures::stream::IntoAsyncRead">IntoAsyncRead</a><St>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/stream/try_stream/into_async_read.rs.html#138-141" title="goto source code">[src]</a></h4><h4 id="method.consume-8" class="method hidden"><code>pub fn <a href="#method.consume-8" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/stream/struct.IntoAsyncRead.html" title="struct futures::stream::IntoAsyncRead">IntoAsyncRead</a><St>>, amount: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/stream/try_stream/into_async_read.rs.html#172-175" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-5" class="impl"><code class="in-band">impl<T> AsyncBufRead for <a class="struct" href="../../futures/io/struct.AllowStdIo.html" title="struct futures::io::AllowStdIo">AllowStdIo</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.BufRead.html" title="trait std::io::BufRead">BufRead</a>, </span></code><a href="#impl-AsyncBufRead-5" class="anchor"></a><a class="srclink" href="../../src/futures_util/io/allow_std.rs.html#168-179" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-9" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-9" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.AllowStdIo.html" title="struct futures::io::AllowStdIo">AllowStdIo</a><T>>, <br> &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/io/allow_std.rs.html#169-170" title="goto source code">[src]</a></h4><h4 id="method.consume-9" class="method hidden"><code>pub fn <a href="#method.consume-9" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.AllowStdIo.html" title="struct futures::io::AllowStdIo">AllowStdIo</a><T>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/io/allow_std.rs.html#176" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-6" class="impl"><code class="in-band">impl<T> AsyncBufRead for <a class="struct" href="../../futures/io/struct.Cursor.html" title="struct futures::io::Cursor">Cursor</a><T> <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>, </span></code><a href="#impl-AsyncBufRead-6" class="anchor"></a><a class="srclink" href="../../src/futures_util/io/cursor.rs.html#187-198" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-10" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-10" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Cursor.html" title="struct futures::io::Cursor">Cursor</a><T>>, <br> &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/io/cursor.rs.html#191" title="goto source code">[src]</a></h4><h4 id="method.consume-10" class="method hidden"><code>pub fn <a href="#method.consume-10" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Cursor.html" title="struct futures::io::Cursor">Cursor</a><T>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/io/cursor.rs.html#195" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-7" class="impl"><code class="in-band">impl<T, U> AsyncBufRead for <a class="struct" href="../../futures/io/struct.Chain.html" title="struct futures::io::Chain">Chain</a><T, U> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a>,<br> U: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a>, </span></code><a href="#impl-AsyncBufRead-7" class="anchor"></a><a class="srclink" href="../../src/futures_util/io/chain.rs.html#130-158" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-11" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-11" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Chain.html" title="struct futures::io::Chain">Chain</a><T, U>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/io/chain.rs.html#135" title="goto source code">[src]</a></h4><h4 id="method.consume-11" class="method hidden"><code>pub fn <a href="#method.consume-11" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.Chain.html" title="struct futures::io::Chain">Chain</a><T, U>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/io/chain.rs.html#149" title="goto source code">[src]</a></h4></div><h3 id="impl-AsyncBufRead-8" class="impl"><code class="in-band">impl<W> AsyncBufRead for <a class="struct" href="../../futures/io/struct.BufWriter.html" title="struct futures::io::BufWriter">BufWriter</a><W> <span class="where fmt-newline">where<br> W: <a class="trait" href="../../futures/io/trait.AsyncBufRead.html" title="trait futures::io::AsyncBufRead">AsyncBufRead</a>, </span></code><a href="#impl-AsyncBufRead-8" class="anchor"></a><a class="srclink" href="../../src/futures_util/io/buf_writer.rs.html#139-141" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.poll_fill_buf-12" class="method hidden"><code>pub fn <a href="#method.poll_fill_buf-12" class="fnname">poll_fill_buf</a>(<br> self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.BufWriter.html" title="struct futures::io::BufWriter">BufWriter</a><W>>, <br> cx: &mut <a class="struct" href="../../futures/task/struct.Context.html" title="struct futures::task::Context">Context</a><'_><br>) -> <a class="enum" href="../../futures/task/enum.Poll.html" title="enum futures::task::Poll">Poll</a><<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <a class="struct" href="../../futures/io/struct.Error.html" title="struct futures::io::Error">Error</a>>></code><a class="srclink" href="../../src/futures_util/io/buf_writer.rs.html#140" title="goto source code">[src]</a></h4><h4 id="method.consume-12" class="method hidden"><code>pub fn <a href="#method.consume-12" class="fnname">consume</a>(self: <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><&mut <a class="struct" href="../../futures/io/struct.BufWriter.html" title="struct futures::io::BufWriter">BufWriter</a><W>>, amt: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code><a class="srclink" href="../../src/futures_util/io/buf_writer.rs.html#140" title="goto source code">[src]</a></h4></div></div><span class="loading-content">Loading content...</span><script type="text/javascript" src="../../implementors/futures_io/if_std/trait.AsyncBufRead.js" async></script></section><section id="search" class="content hidden"></section><section class="footer"></section><div 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