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<meta name="description" content="API documentation for the Rust `vec` mod in crate `bitflags`.">
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<title>bitflags::__core::vec - Rust</title>
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<p class='location'><a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a></p><script>window.sidebarCurrent = {name: 'vec', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script>
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<section id='main' class="content mod">
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<h1 class='fqn'><span class='in-band'>Module <a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a class='mod' href=''>vec</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a id='src-4028' class='srclink' href='https://doc.rust-lang.org/nightly/collections/vec/index.html?gotosrc=4028' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>A contiguous growable array type with heap-allocated contents, written
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<code>Vec<T></code> but pronounced 'vector.'</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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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<p>You can explicitly create a <code>Vec<T></code> with <code>new()</code>:</p>
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<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>
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<p>...or by using the <code>vec!</code> macro:</p>
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<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>
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<p>You can <code>push</code> values onto the end of a vector (which will grow the vector
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as needed):</p>
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<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>
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<p>Popping values works in much the same way:</p>
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<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>
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<p>Vectors also support indexing (through the <code>Index</code> and <code>IndexMut</code> traits):</p>
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<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>
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</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class='struct' href='struct.Drain.html'
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title='bitflags::__core::vec::Drain'>Drain</a></td>
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<td class='docblock short'>
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<p>A draining iterator for <code>Vec<T></code>.</p>
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</td>
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<td><a class='struct' href='struct.IntoIter.html'
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title='bitflags::__core::vec::IntoIter'>IntoIter</a></td>
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<td class='docblock short'>
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<p>An iterator that moves out of a vector.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class='struct' href='struct.Vec.html'
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title='bitflags::__core::vec::Vec'>Vec</a></td>
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<td class='docblock short'>
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<p>A contiguous growable array type, written <code>Vec<T></code> but pronounced 'vector.'</p>
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</td>
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