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44 lines
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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 `vec` mod in crate `nom`."><meta name="keywords" content="rust, rustlang, rust-lang, vec"><title>nom::lib::std::vec - 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="../../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../../light.css" id="themeStyle"><script src="../../../../storage.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="shortcut icon" href="../../../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[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='../../../../nom/index.html'><div class='logo-container'><img src='../../../../rust-logo.png' alt='logo'></div></a><p class='location'>Module vec</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li></ul></div><p class='location'><a href='../../../index.html'>nom</a>::<wbr><a href='../../index.html'>lib</a>::<wbr><a href='../index.html'>std</a></p><script>window.sidebarCurrent = {name: 'vec', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></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><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='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><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='https://doc.rust-lang.org/nightly/src/alloc/lib.rs.html#165' title='goto source code'>[src]</a></span><span class='in-band'>Module <a href='../../../index.html'>nom</a>::<wbr><a href='../../index.html'>lib</a>::<wbr><a href='../index.html'>std</a>::<wbr><a class="mod" href=''>vec</a></span></h1><div class='docblock'><p>A contiguous growable array type with heap-allocated contents, written
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<code>Vec<T></code>.</p>
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<p>Vectors have <code>O(1)</code> indexing, amortized <code>O(1)</code> push (to the end) and
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<code>O(1)</code> pop (from the end).</p>
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<p>Vectors ensure they never allocate more than <code>isize::MAX</code> bytes.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<p>You can explicitly create a <a href="../../std/vec/struct.Vec.html"><code>Vec<T></code></a> with <a href="../../std/vec/struct.Vec.html#method.new"><code>new</code></a>:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();</pre></div>
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<p>...or by using the <a href="../../std/macro.vec.html"><code>vec!</code></a> macro:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[];
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<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>];
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<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>; <span class="number">10</span>]; <span class="comment">// ten zeroes</span></pre></div>
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<p>You can <a href="../../std/vec/struct.Vec.html#method.push"><code>push</code></a> values onto the end of a vector (which will grow the vector
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as needed):</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>];
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<span class="ident">v</span>.<span class="ident">push</span>(<span class="number">3</span>);</pre></div>
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<p>Popping values works in much the same way:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>];
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<span class="kw">let</span> <span class="ident">two</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">pop</span>();</pre></div>
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<p>Vectors also support indexing (through the <a href="../../std/ops/trait.Index.html"><code>Index</code></a> and <a href="../../std/ops/trait.IndexMut.html"><code>IndexMut</code></a> traits):</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>];
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<span class="kw">let</span> <span class="ident">three</span> <span class="op">=</span> <span class="ident">v</span>[<span class="number">2</span>];
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<span class="ident">v</span>[<span class="number">1</span>] <span class="op">=</span> <span class="ident">v</span>[<span class="number">1</span>] <span class="op">+</span> <span class="number">5</span>;</pre></div>
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</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table><tr class='module-item'><td><a class="struct" href="struct.Drain.html" title='nom::lib::std::vec::Drain struct'>Drain</a></td><td class='docblock-short'><p>A draining iterator for <code>Vec<T></code>.</p>
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</td></tr><tr class='module-item'><td><a class="struct" href="struct.IntoIter.html" title='nom::lib::std::vec::IntoIter struct'>IntoIter</a></td><td class='docblock-short'><p>An iterator that moves out of a vector.</p>
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</td></tr><tr class='module-item'><td><a class="struct" href="struct.Splice.html" title='nom::lib::std::vec::Splice struct'>Splice</a></td><td class='docblock-short'><p>A splicing iterator for <code>Vec</code>.</p>
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</td></tr><tr class='module-item'><td><a class="struct" href="struct.Vec.html" title='nom::lib::std::vec::Vec struct'>Vec</a></td><td class='docblock-short'><p>A contiguous growable array type, written <code>Vec<T></code> but pronounced 'vector'.</p>
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</td></tr><tr class='unstable module-item'><td><a class="struct" href="struct.DrainFilter.html" title='nom::lib::std::vec::DrainFilter struct'>DrainFilter</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>An iterator produced by calling <code>drain_filter</code> on Vec.</p>
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</td></tr></table></section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../../../";window.currentCrate = "nom";</script><script src="../../../../aliases.js"></script><script src="../../../../main.js"></script><script defer src="../../../../search-index.js"></script></body></html> |