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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 `char` mod in crate `core`."><meta name="keywords" content="rust, rustlang, rust-lang, char"><title>core::char - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize1.35.0.css"><link rel="stylesheet" type="text/css" href="../../rustdoc1.35.0.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark1.35.0.css"><link rel="stylesheet" type="text/css" href="../../light1.35.0.css" id="themeStyle"><script src="../../storage1.35.0.js"></script><noscript><link rel="stylesheet" href="../../noscript1.35.0.css"></noscript><link rel="shortcut icon" href="../../favicon1.35.0.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow1.35.0.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">&#9776;</div><a href='../../core/index.html'><img src='../../rust-logo1.35.0.png' alt='logo' width='100'></a><p class='location'>Module char</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#constants">Constants</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'><a href='../index.html'>core</a></p><script>window.sidebarCurrent = {name: 'char', 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="../../brush1.35.0.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme1.35.0.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" 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="../../wheel1.35.0.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 1.2.0'>1.2.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../../src/core/char/mod.rs.html#1-516' title='goto source code'>[src]</a></span><span class='in-band'>Module <a href='../index.html'>core</a>::<wbr><a class="mod" href=''>char</a></span></h1><div class='docblock'><p>A character type.</p>
<p>The <code>char</code> type represents a single character. More specifically, since
'character' isn't a well-defined concept in Unicode, <code>char</code> is a '<a href="http://www.unicode.org/glossary/#unicode_scalar_value">Unicode
scalar value</a>', which is similar to, but not the same as, a '<a href="http://www.unicode.org/glossary/#code_point">Unicode code
point</a>'.</p>
<p>This module exists for technical reasons, the primary documentation for
<code>char</code> is directly on <a href="../../std/primitive.char.html">the <code>char</code> primitive type</a>
itself.</p>
<p>This module is the home of the iterator implementations for the iterators
implemented on <code>char</code>, as well as some useful constants and conversion
functions that convert various types to <code>char</code>.</p>
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
<table><tr class='module-item'><td><a class="struct" href="struct.CharTryFromError.html" title='core::char::CharTryFromError struct'>CharTryFromError</a></td><td class='docblock-short'><p>The error type returned when a conversion from u32 to char fails.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.DecodeUtf16.html" title='core::char::DecodeUtf16 struct'>DecodeUtf16</a></td><td class='docblock-short'><p>An iterator that decodes UTF-16 encoded code points from an iterator of <code>u16</code>s.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.DecodeUtf16Error.html" title='core::char::DecodeUtf16Error struct'>DecodeUtf16Error</a></td><td class='docblock-short'><p>An error that can be returned when decoding UTF-16 code points.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.EscapeDebug.html" title='core::char::EscapeDebug struct'>EscapeDebug</a></td><td class='docblock-short'><p>An iterator that yields the literal escape code of a <code>char</code>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.EscapeDefault.html" title='core::char::EscapeDefault struct'>EscapeDefault</a></td><td class='docblock-short'><p>An iterator that yields the literal escape code of a <code>char</code>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.EscapeUnicode.html" title='core::char::EscapeUnicode struct'>EscapeUnicode</a></td><td class='docblock-short'><p>Returns an iterator that yields the hexadecimal Unicode escape of a
character, as <code>char</code>s.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ParseCharError.html" title='core::char::ParseCharError struct'>ParseCharError</a></td><td class='docblock-short'><p>An error which can be returned when parsing a char.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ToLowercase.html" title='core::char::ToLowercase struct'>ToLowercase</a></td><td class='docblock-short'><p>Returns an iterator that yields the lowercase equivalent of a <code>char</code>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ToUppercase.html" title='core::char::ToUppercase struct'>ToUppercase</a></td><td class='docblock-short'><p>Returns an iterator that yields the uppercase equivalent of a <code>char</code>.</p>
</td></tr><tr class='unstable module-item'><td><a class="struct" href="struct.UnicodeVersion.html" title='core::char::UnicodeVersion struct'>UnicodeVersion</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>Represents a Unicode Version.</p>
</td></tr></table><h2 id='constants' class='section-header'><a href="#constants">Constants</a></h2>
<table><tr class='module-item'><td><a class="constant" href="constant.MAX.html" title='core::char::MAX constant'>MAX</a></td><td class='docblock-short'><p>The highest valid code point a <code>char</code> can have.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.REPLACEMENT_CHARACTER.html" title='core::char::REPLACEMENT_CHARACTER constant'>REPLACEMENT_CHARACTER</a></td><td class='docblock-short'><p><code>U+FFFD REPLACEMENT CHARACTER</code> (�) is used in Unicode to represent a
decoding error.</p>
</td></tr><tr class='unstable module-item'><td><a class="constant" href="constant.UNICODE_VERSION.html" title='core::char::UNICODE_VERSION constant'>UNICODE_VERSION</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>The version of <a href="http://www.unicode.org/">Unicode</a> that the Unicode parts of
<code>char</code> and <code>str</code> methods are based on.</p>
</td></tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
<table><tr class='module-item'><td><a class="fn" href="fn.decode_utf16.html" title='core::char::decode_utf16 fn'>decode_utf16</a></td><td class='docblock-short'><p>Creates an iterator over the UTF-16 encoded code points in <code>iter</code>,
returning unpaired surrogates as <code>Err</code>s.</p>
</td></tr><tr class='module-item'><td><a class="fn" href="fn.from_digit.html" title='core::char::from_digit fn'>from_digit</a></td><td class='docblock-short'><p>Converts a digit in the given radix to a <code>char</code>.</p>
</td></tr><tr class='module-item'><td><a class="fn" href="fn.from_u32.html" title='core::char::from_u32 fn'>from_u32</a></td><td class='docblock-short'><p>Converts a <code>u32</code> to a <code>char</code>.</p>
</td></tr><tr class='module-item'><td><a class="fn" href="fn.from_u32_unchecked.html" title='core::char::from_u32_unchecked fn'>from_u32_unchecked</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td><td class='docblock-short'><p>Converts a <code>u32</code> to a <code>char</code>, ignoring validity.</p>
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