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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="The high-level intermediate representation of a character class."><title>Class in regex_syntax::hir - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="regex_syntax" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc enum"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../regex_syntax/index.html">regex_syntax</a><span class="version">0.8.2</span></h2></div><h2 class="location"><a href="#">Class</a></h2><div class="sidebar-elems"><section><h3><a href="#variants">Variants</a></h3><ul class="block variant"><li><a href="#variant.Bytes">Bytes</a></li><li><a href="#variant.Unicode">Unicode</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.case_fold_simple">case_fold_simple</a></li><li><a href="#method.is_empty">is_empty</a></li><li><a href="#method.is_utf8">is_utf8</a></li><li><a href="#method.literal">literal</a></li><li><a href="#method.maximum_len">maximum_len</a></li><li><a href="#method.minimum_len">minimum_len</a></li><li><a href="#method.negate">negate</a></li><li><a href="#method.try_case_fold_simple">try_case_fold_simple</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-Class">Clone</a></li><li><a href="#impl-Debug-for-Class">Debug</a></li><li><a href="#impl-Eq-for-Class">Eq</a></li><li><a href="#impl-PartialEq-for-Class">PartialEq</a></li><li><a href="#impl-StructuralEq-for-Class">StructuralEq</a></li><li><a href="#impl-StructuralPartialEq-for-Class">StructuralPartialEq</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-Class">RefUnwindSafe</a></li><li><a href="#impl-Send-for-Class">Send</a></li><li><a href="#impl-Sync-for-Class">Sync</a></li><li><a href="#impl-Unpin-for-Class">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Class">UnwindSafe</a></li></ul><h3><a href="#blanket-implement
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../regex_syntax/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Enum <a href="../index.html">regex_syntax</a>::<wbr><a href="index.html">hir</a>::<wbr><a class="enum" href="#">Class</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/regex_syntax/hir/mod.rs.html#818-824">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub enum Class {
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Unicode(<a class="struct" href="struct.ClassUnicode.html" title="struct regex_syntax::hir::ClassUnicode">ClassUnicode</a>),
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Bytes(<a class="struct" href="struct.ClassBytes.html" title="struct regex_syntax::hir::ClassBytes">ClassBytes</a>),
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}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>The high-level intermediate representation of a character class.</p>
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<p>A character class corresponds to a set of characters. A character is either
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defined by a Unicode scalar value or a byte.</p>
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<p>A character class, regardless of its character type, is represented by a
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sequence of non-overlapping non-adjacent ranges of characters.</p>
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<p>There are no guarantees about which class variant is used. Generally
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speaking, the Unicode variat is used whenever a class needs to contain
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non-ASCII Unicode scalar values. But the Unicode variant can be used even
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when Unicode mode is disabled. For example, at the time of writing, the
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regex <code>(?-u:a|\xc2\xa0)</code> will compile down to HIR for the Unicode class
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<code>[a\u00A0]</code> due to optimizations.</p>
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<p>Note that <code>Bytes</code> variant may be produced even when it exclusively matches
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valid UTF-8. This is because a <code>Bytes</code> variant represents an intention by
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the author of the regular expression to disable Unicode mode, which in turn
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impacts the semantics of case insensitive matching. For example, <code>(?i)k</code>
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and <code>(?i-u)k</code> will not match the same set of strings.</p>
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</div></details><h2 id="variants" class="variants section-header">Variants<a href="#variants" class="anchor">§</a></h2><div class="variants"><section id="variant.Unicode" class="variant"><a href="#variant.Unicode" class="anchor">§</a><h3 class="code-header">Unicode(<a class="struct" href="struct.ClassUnicode.html" title="struct regex_syntax::hir::ClassUnicode">ClassUnicode</a>)</h3></section><div class="docblock"><p>A set of characters represented by Unicode scalar values.</p>
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</div><section id="variant.Bytes" class="variant"><a href="#variant.Bytes" class="anchor">§</a><h3 class="code-header">Bytes(<a class="struct" href="struct.ClassBytes.html" title="struct regex_syntax::hir::ClassBytes">ClassBytes</a>)</h3></section><div class="docblock"><p>A set of characters represented by arbitrary bytes (one byte per
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character).</p>
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</div></div><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Class" class="impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#826-1014">source</a><a href="#impl-Class" class="anchor">§</a><h3 class="code-header">impl <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.case_fold_simple" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#842-847">source</a><h4 class="code-header">pub fn <a href="#method.case_fold_simple" class="fn">case_fold_simple</a>(&mut self)</h4></section></summary><div class="docblock"><p>Apply Unicode simple case folding to this character class, in place.
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The character class will be expanded to include all simple case folded
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character variants.</p>
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<p>If this is a byte oriented character class, then this will be limited
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to the ASCII ranges <code>A-Z</code> and <code>a-z</code>.</p>
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<h5 id="panics"><a href="#panics">Panics</a></h5>
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<p>This routine panics when the case mapping data necessary for this
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routine to complete is unavailable. This occurs when the <code>unicode-case</code>
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feature is not enabled and the underlying class is Unicode oriented.</p>
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<p>Callers should prefer using <code>try_case_fold_simple</code> instead, which will
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return an error instead of panicking.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.try_case_fold_simple" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#862-870">source</a><h4 class="code-header">pub fn <a href="#method.try_case_fold_simple" class="fn">try_case_fold_simple</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.unit.html">()</a>, <a class="struct" href="struct.CaseFoldError.html" title="struct regex_syntax::hir::CaseFoldError">CaseFoldError</a>></h4></section></summary><div class="docblock"><p>Apply Unicode simple case folding to this character class, in place.
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The character class will be expanded to include all simple case folded
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character variants.</p>
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<p>If this is a byte oriented character class, then this will be limited
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to the ASCII ranges <code>A-Z</code> and <code>a-z</code>.</p>
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<h5 id="error"><a href="#error">Error</a></h5>
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<p>This routine returns an error when the case mapping data necessary
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for this routine to complete is unavailable. This occurs when the
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<code>unicode-case</code> feature is not enabled and the underlying class is
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Unicode oriented.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.negate" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#876-881">source</a><h4 class="code-header">pub fn <a href="#method.negate" class="fn">negate</a>(&mut self)</h4></section></summary><div class="docblock"><p>Negate this character class in place.</p>
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<p>After completion, this character class will contain precisely the
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characters that weren’t previously in the class.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.is_utf8" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#894-899">source</a><h4 class="code-header">pub fn <a href="#method.is_utf8" class="fn">is_utf8</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if and only if this character class will only ever match
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valid UTF-8.</p>
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<p>A character class can match invalid UTF-8 only when the following
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conditions are met:</p>
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<ol>
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<li>The translator was configured to permit generating an expression
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that can match invalid UTF-8. (By default, this is disabled.)</li>
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<li>Unicode mode (via the <code>u</code> flag) was disabled either in the concrete
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syntax or in the parser builder. By default, Unicode mode is
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enabled.</li>
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</ol>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.minimum_len" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#938-943">source</a><h4 class="code-header">pub fn <a href="#method.minimum_len" class="fn">minimum_len</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.usize.html">usize</a>></h4></section></summary><div class="docblock"><p>Returns the length, in bytes, of the smallest string matched by this
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character class.</p>
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<p>For non-empty byte oriented classes, this always returns <code>1</code>. For
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non-empty Unicode oriented classes, this can return <code>1</code>, <code>2</code>, <code>3</code> or
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<code>4</code>. For empty classes, <code>None</code> is returned. It is impossible for <code>0</code> to
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be returned.</p>
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<h5 id="example"><a href="#example">Example</a></h5>
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<p>This example shows some examples of regexes and their corresponding
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minimum length, if any.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_syntax::{hir::Properties, parse};
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<span class="comment">// The empty string has a min length of 0.
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</span><span class="kw">let </span>hir = parse(<span class="string">r""</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), hir.properties().minimum_len());
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<span class="comment">// As do other types of regexes that only match the empty string.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"^$\b\B"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), hir.properties().minimum_len());
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<span class="comment">// A regex that can match the empty string but match more is still 0.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"a*"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), hir.properties().minimum_len());
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<span class="comment">// A regex that matches nothing has no minimum defined.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"[a&&b]"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, hir.properties().minimum_len());
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<span class="comment">// Character classes usually have a minimum length of 1.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"\w"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">1</span>), hir.properties().minimum_len());
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<span class="comment">// But sometimes Unicode classes might be bigger!
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</span><span class="kw">let </span>hir = parse(<span class="string">r"\p{Cyrillic}"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">2</span>), hir.properties().minimum_len());
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</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.maximum_len" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#985-990">source</a><h4 class="code-header">pub fn <a href="#method.maximum_len" class="fn">maximum_len</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.usize.html">usize</a>></h4></section></summary><div class="docblock"><p>Returns the length, in bytes, of the longest string matched by this
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character class.</p>
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<p>For non-empty byte oriented classes, this always returns <code>1</code>. For
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non-empty Unicode oriented classes, this can return <code>1</code>, <code>2</code>, <code>3</code> or
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<code>4</code>. For empty classes, <code>None</code> is returned. It is impossible for <code>0</code> to
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be returned.</p>
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<h5 id="example-1"><a href="#example-1">Example</a></h5>
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<p>This example shows some examples of regexes and their corresponding
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maximum length, if any.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_syntax::{hir::Properties, parse};
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<span class="comment">// The empty string has a max length of 0.
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</span><span class="kw">let </span>hir = parse(<span class="string">r""</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), hir.properties().maximum_len());
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<span class="comment">// As do other types of regexes that only match the empty string.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"^$\b\B"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>), hir.properties().maximum_len());
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<span class="comment">// A regex that matches nothing has no maximum defined.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"[a&&b]"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, hir.properties().maximum_len());
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<span class="comment">// Bounded repeats work as you expect.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"x{2,10}"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">10</span>), hir.properties().maximum_len());
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<span class="comment">// An unbounded repeat means there is no maximum.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"x{2,}"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, hir.properties().maximum_len());
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<span class="comment">// With Unicode enabled, \w can match up to 4 bytes!
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</span><span class="kw">let </span>hir = parse(<span class="string">r"\w"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">4</span>), hir.properties().maximum_len());
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<span class="comment">// Without Unicode enabled, \w matches at most 1 byte.
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</span><span class="kw">let </span>hir = parse(<span class="string">r"(?-u)\w"</span>)<span class="question-mark">?</span>;
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<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="number">1</span>), hir.properties().maximum_len());
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</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.is_empty" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#996-1001">source</a><h4 class="code-header">pub fn <a href="#method.is_empty" class="fn">is_empty</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if and only if this character class is empty. That is,
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it has no elements.</p>
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<p>An empty character can never match anything, including an empty string.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.literal" class="method"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#1008-1013">source</a><h4 class="code-header">pub fn <a href="#method.literal" class="fn">literal</a>(&self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="https://doc.rust-lang.org/1.76.0/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u8.html">u8</a>>></h4></section></summary><div class="docblock"><p>If this class consists of exactly one element (whether a codepoint or a
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byte), then return it as a literal byte string.</p>
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<p>If this class is empty or contains more than one element, then <code>None</code>
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is returned.</p>
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</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Clone-for-Class" class="impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#817">source</a><a href="#impl-Clone-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#817">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&self) -> <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/clone.rs.html#169">source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&Self</a>)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Debug-for-Class" class="impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#1016-1035">source</a><a href="#impl-Debug-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#1017-1034">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/1.76.0/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/1.76.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-PartialEq-for-Class" class="impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#817">source</a><a href="#impl-PartialEq-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html" title="trait core::cmp::Par
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by <code>==</code>.</div></details><details class="toggle method-toggle" open><summary><section id="method.ne" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.76.0/src/core/cmp.rs.html#242">source</a></span><a href="#method.ne" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#method.ne" class="fn">ne</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&Rhs</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>!=</code>. The default implementation is almost always
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sufficient, and should not be overridden without very good reason.</div></details></div></details><section id="impl-Eq-for-Class" class="impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#817">source</a><a href="#impl-Eq-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section><section id="impl-StructuralEq-for-Class" class="impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#817">source</a><a href="#impl-StructuralEq-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.StructuralEq.html" title="trait core::marker::StructuralEq">StructuralEq</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section><section id="impl-StructuralPartialEq-for-Class" class="impl"><a class="src rightside" href="../../src/regex_syntax/hir/mod.rs.html#817">source</a><a href="#impl-StructuralPartialEq-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.StructuralPartialEq.html" title="trait core::marker::StructuralPartialEq">StructuralPartialEq</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-Class" class="impl"><a href="#impl-RefUnwindSafe-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section><section id="impl-Send-for-Class" class="impl"><a href="#impl-Send-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section><section id="impl-Sync-for-Class" class="impl"><a href="#impl-Sync-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section><section id="impl-Unpin-for-Class" class="impl"><a href="#impl-Unpin-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section><section id="impl-UnwindSafe-for-Class" class="impl"><a href="#impl-UnwindSafe-for-Class" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="enum" href="enum.Class.html" title="enum regex_syntax::hir::Class">Class</a></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-
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T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#763">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#766">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#756">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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<p>That is, this conversion is whatever the implementation of
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<code><a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#83-85">source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where
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T: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#88">source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#92">source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
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