<!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 `from_boxed_utf8_unchecked` fn in crate `alloc`."><meta name="keywords" content="rust, rustlang, rust-lang, from_boxed_utf8_unchecked"><title>alloc::str::from_boxed_utf8_unchecked - 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><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc fn"><!--[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='../../alloc/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><div class="sidebar-elems"><p class='location'><a href='../index.html'>alloc</a>::<wbr><a href='index.html'>str</a></p><script>window.sidebarCurrent = {name: 'from_boxed_utf8_unchecked', ty: 'fn', 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 js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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'>Function <a href='../index.html'>alloc</a>::<wbr><a href='index.html'>str</a>::<wbr><a class="fn" href=''>from_boxed_utf8_unchecked</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.20.0'>1.20.0</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='../../src/alloc/str.rs.html#582-584' title='goto source code'>[src]</a></span></h1><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="../../alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><I></span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="../../alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><I></h3><code class="content"><span class="where fmt-newline">impl<I: <a class="trait" href="../../core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> + ?<a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="../../core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="../../alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><I></span><span class="where fmt-newline"> type <a href='../../core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = I::<a class="type" href="../../core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>;</span></code></div></div><pre class='rust fn'>pub unsafe fn from_boxed_utf8_unchecked(v: <a class="struct" href="../../alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><[u8]>) -> <a class="struct" href="../../alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><str></pre><div class='docblock'><p>Converts a boxed slice of bytes to a boxed string slice without checking
that the string contains valid UTF-8.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<p>Basic usage:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">smile_utf8</span> <span class="op">=</span> <span class="ident">Box</span>::<span class="ident">new</span>([<span class="number">226</span>, <span class="number">152</span>, <span class="number">186</span>]);
<span class="kw">let</span> <span class="ident">smile</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">std</span>::<span class="ident">str</span>::<span class="ident">from_boxed_utf8_unchecked</span>(<span class="ident">smile_utf8</span>) };
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"☺"</span>, <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">smile</span>);</pre>
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