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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="Generates a parser taking `count` bits"><meta name="keywords" content="rust, rustlang, rust-lang, take"><title>take in nom::bits::complete - 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 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things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../../nom/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../../nom/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In nom::bits::complete</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../../nom/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="../../index.html">nom</a>::<wbr><a href="../index.html">bits</a>::<wbr><a href="index.html">complete</a>::<wbr><a class="fn" href="#">take</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../../src/nom/bits/complete.rs.html#33-82">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn take<I, O, C, E: <a class="trait" href="../../error/trait.ParseError.html" title="trait nom::error::ParseError">ParseError</a><(I, <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>)>>(<br> count: C<br>) -> impl <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>((I, <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>)) -> <a class="type" href="../../type.IResult.html" title="type nom::IResult">IResult</a><(I, <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>), O, E> <span class="where fmt-newline">where<br> I: <a class="trait" href="../../trait.Slice.html" title="trait nom::Slice">Slice</a><<a class="struct" href="https://doc.rust-lang.org/1.64.0/core/ops/range/struct.RangeFrom.html" title="struct core::ops::range::RangeFrom">RangeFrom</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>>> + <a class="trait" href="../../trait.InputIter.html" title="trait nom::InputIter">InputIter</a><Item = <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>> + <a class="trait" href="../../trait.InputLength.html" title="trait nom::InputLength">InputLength</a>,<br> C: <a class="trait" href="../../trait.ToUsize.html" title="trait nom::ToUsize">ToUsize</a>,<br> O: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.u8.html">u8</a>> + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/ops/arith/trait.AddAssign.html" title="trait core::ops::arith::AddAssign">AddAssign</a> + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/ops/bit/trait.Shl.html" title="trait core::ops::bit::Shl">Shl</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>, Output = O> + <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/ops/bit/trait.Shr.html" title="trait core::ops::bit::Shr">Shr</a><<a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.usize.html">usize</a>, Output = O>, </span></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Generates a parser taking <code>count</code> bits</p>
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<h2 id="example"><a href="#example">Example</a></h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="comment">// Input is a tuple of (input: I, bit_offset: usize)</span>
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<span class="kw">fn</span> <span class="ident">parser</span>(<span class="ident">input</span>: (<span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="ident">usize</span>), <span class="ident">count</span>: <span class="ident">usize</span>)-> <span class="ident">IResult</span><span class="op"><</span>(<span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="ident">usize</span>), <span class="ident">u8</span><span class="op">></span> {
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<span class="ident">take</span>(<span class="ident">count</span>)(<span class="ident">input</span>)
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}
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<span class="comment">// Consumes 0 bits, returns 0</span>
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<span class="macro">assert_eq!</span>(<span class="ident">parser</span>(([<span class="number">0b00010010</span>].<span class="ident">as_ref</span>(), <span class="number">0</span>), <span class="number">0</span>), <span class="prelude-val">Ok</span>((([<span class="number">0b00010010</span>].<span class="ident">as_ref</span>(), <span class="number">0</span>), <span class="number">0</span>)));
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<span class="comment">// Consumes 4 bits, returns their values and increase offset to 4</span>
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<span class="macro">assert_eq!</span>(<span class="ident">parser</span>(([<span class="number">0b00010010</span>].<span class="ident">as_ref</span>(), <span class="number">0</span>), <span class="number">4</span>), <span class="prelude-val">Ok</span>((([<span class="number">0b00010010</span>].<span class="ident">as_ref</span>(), <span class="number">4</span>), <span class="number">0b00000001</span>)));
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<span class="comment">// Consumes 4 bits, offset is 4, returns their values and increase offset to 0 of next byte</span>
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<span class="macro">assert_eq!</span>(<span class="ident">parser</span>(([<span class="number">0b00010010</span>].<span class="ident">as_ref</span>(), <span class="number">4</span>), <span class="number">4</span>), <span class="prelude-val">Ok</span>((([].<span class="ident">as_ref</span>(), <span class="number">0</span>), <span class="number">0b00000010</span>)));
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<span class="comment">// Tries to consume 12 bits but only 8 are available</span>
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<span class="macro">assert_eq!</span>(<span class="ident">parser</span>(([<span class="number">0b00010010</span>].<span class="ident">as_ref</span>(), <span class="number">0</span>), <span class="number">12</span>), <span class="prelude-val">Err</span>(<span class="ident">nom::Err::Error</span>(<span class="ident">Error</span>{<span class="ident">input</span>: ([<span class="number">0b00010010</span>].<span class="ident">as_ref</span>(), <span class="number">0</span>), <span class="ident">code</span>: <span class="ident">ErrorKind::Eof</span> })));</code></pre></div>
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