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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="A look-around assertion."><title>Look in regex_automata::util::look - 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" 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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_automata/index.html">regex_automata</a><span class="version">0.4.5</span></h2></div><h2 class="location"><a href="#">Look</a></h2><div class="sidebar-elems"><section><h3><a href="#variants">Variants</a></h3><ul class="block variant"><li><a href="#variant.End">End</a></li><li><a href="#variant.EndCRLF">EndCRLF</a></li><li><a href="#variant.EndLF">EndLF</a></li><li><a href="#variant.Start">Start</a></li><li><a href="#variant.StartCRLF">StartCRLF</a></li><li><a href="#variant.StartLF">StartLF</a></li><li><a href="#variant.WordAscii">WordAscii</a></li><li><a href="#variant.WordAsciiNegate">WordAsciiNegate</a></li><li><a href="#variant.WordEndAscii">WordEndAscii</a></li><li><a href="#variant.WordEndHalfAscii">WordEndHalfAscii</a></li><li><a href="#variant.WordEndHalfUnicode">WordEndHalfUnicode</a></li><li><a href="#variant.WordEndUnicode">WordEndUnicode</a></li><li><a href="#variant.WordStartAscii">WordStartAscii</a></li><li><a href="#variant.WordStartHalfAscii">WordStartHalfAscii</a></li><li><a href="#variant.WordStartHalfUnicode">WordStartHalfUnicode</a></li><li><a href="#variant.WordStartUnicode">WordStartUnicode</a></li><li><a href="#variant.WordUnicode">WordUnicode</a></li><li><a href="#variant.WordUnicodeNegate">WordUnicodeNegate</a></li></ul><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.as_char">as_char</a></li><li><a href="#method.as_repr">as_repr</a></li><li><a href="#method.from_repr">from_repr</a></li><li><a href="#method.reversed">reversed</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-Look">Clone</a></li><li><a href="#impl-Copy-for-Look">Copy</a></li><li><a href="#impl-Debug-for-Look">Debug</a></li><li><a href="#impl-Eq-for-Look">Eq</a></li><li><a href="#impl-PartialEq-for-Look">PartialEq</a></li><li><a href="#impl-StructuralEq-for-Look">StructuralEq</a></li><li><a href="#impl-StructuralPartialEq-for-Look">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-Look">RefUnwindSafe</a></li><li><a href="#impl-Send-for-Look">Send</a></li><li><a href="#impl-Sync-for-Look">Sync</a></li><li><a href="#impl-Unpin-for-Look">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Look">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-T">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-T">Into<U></a></li><li><a href="#impl-ToOwned-for-T">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto<U></a></li></ul></section><h2><a href="index.html">In regex_automata::util::look</a></h2></div></nav><div class="sidebar-resizer"></div>
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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_automata/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_automata</a>::<wbr><a href="../index.html">util</a>::<wbr><a href="index.html">look</a>::<wbr><a class="enum" href="#">Look</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_automata/util/look.rs.html#62-135">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub enum Look {
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<details class="toggle type-contents-toggle"><summary class="hideme"><span>Show 18 variants</span></summary> Start = 1,
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End = 2,
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StartLF = 4,
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EndLF = 8,
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StartCRLF = 16,
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EndCRLF = 32,
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WordAscii = 64,
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WordAsciiNegate = 128,
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WordUnicode = 256,
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WordUnicodeNegate = 512,
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WordStartAscii = 1_024,
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WordEndAscii = 2_048,
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WordStartUnicode = 4_096,
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WordEndUnicode = 8_192,
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WordStartHalfAscii = 16_384,
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WordEndHalfAscii = 32_768,
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WordStartHalfUnicode = 65_536,
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WordEndHalfUnicode = 131_072,
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</details>}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A look-around assertion.</p>
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<p>An assertion matches at a position between characters in a haystack.
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Namely, it does not actually “consume” any input as most parts of a regular
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expression do. Assertions are a way of stating that some property must be
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true at a particular point during matching.</p>
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<p>For example, <code>(?m)^[a-z]+$</code> is a pattern that:</p>
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<ul>
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<li>Scans the haystack for a position at which <code>(?m:^)</code> is satisfied. That
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occurs at either the beginning of the haystack, or immediately following
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a <code>\n</code> character.</li>
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<li>Looks for one or more occurrences of <code>[a-z]</code>.</li>
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<li>Once <code>[a-z]+</code> has matched as much as it can, an overall match is only
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reported when <code>[a-z]+</code> stops just before a <code>\n</code>.</li>
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</ul>
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<p>So in this case, <code>abc</code> and <code>\nabc\n</code> match, but <code>\nabc1\n</code> does not.</p>
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<p>Assertions are also called “look-around,” “look-behind” and “look-ahead.”
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Specifically, some assertions are look-behind (like <code>^</code>), other assertions
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are look-ahead (like <code>$</code>) and yet other assertions are both look-ahead and
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look-behind (like <code>\b</code>).</p>
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<h2 id="assertions-in-an-nfa"><a href="#assertions-in-an-nfa">Assertions in an NFA</a></h2>
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<p>An assertion in a <a href="../../nfa/thompson/struct.NFA.html" title="struct regex_automata::nfa::thompson::NFA"><code>thompson::NFA</code></a> can be
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thought of as a conditional epsilon transition. That is, a matching engine
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like the <a href="../../nfa/thompson/pikevm/struct.PikeVM.html" title="struct regex_automata::nfa::thompson::pikevm::PikeVM"><code>PikeVM</code></a> only permits
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moving through conditional epsilon transitions when their condition
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is satisfied at whatever position the <code>PikeVM</code> is currently at in the
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haystack.</p>
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<p>How assertions are handled in a <code>DFA</code> is trickier, since a DFA does not
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have epsilon transitions at all. In this case, they are compiled into the
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automaton itself, at the expense of more states than what would be required
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without an assertion.</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.Start" class="variant"><a href="#variant.Start" class="anchor">§</a><h3 class="code-header">Start = 1</h3></section><div class="docblock"><p>Match the beginning of text. Specifically, this matches at the starting
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position of the input.</p>
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</div><section id="variant.End" class="variant"><a href="#variant.End" class="anchor">§</a><h3 class="code-header">End = 2</h3></section><div class="docblock"><p>Match the end of text. Specifically, this matches at the ending
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position of the input.</p>
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</div><section id="variant.StartLF" class="variant"><a href="#variant.StartLF" class="anchor">§</a><h3 class="code-header">StartLF = 4</h3></section><div class="docblock"><p>Match the beginning of a line or the beginning of text. Specifically,
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this matches at the starting position of the input, or at the position
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immediately following a <code>\n</code> character.</p>
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</div><section id="variant.EndLF" class="variant"><a href="#variant.EndLF" class="anchor">§</a><h3 class="code-header">EndLF = 8</h3></section><div class="docblock"><p>Match the end of a line or the end of text. Specifically, this matches
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at the end position of the input, or at the position immediately
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preceding a <code>\n</code> character.</p>
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</div><section id="variant.StartCRLF" class="variant"><a href="#variant.StartCRLF" class="anchor">§</a><h3 class="code-header">StartCRLF = 16</h3></section><div class="docblock"><p>Match the beginning of a line or the beginning of text. Specifically,
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this matches at the starting position of the input, or at the position
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immediately following either a <code>\r</code> or <code>\n</code> character, but never after
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a <code>\r</code> when a <code>\n</code> follows.</p>
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</div><section id="variant.EndCRLF" class="variant"><a href="#variant.EndCRLF" class="anchor">§</a><h3 class="code-header">EndCRLF = 32</h3></section><div class="docblock"><p>Match the end of a line or the end of text. Specifically, this matches
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at the end position of the input, or at the position immediately
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preceding a <code>\r</code> or <code>\n</code> character, but never before a <code>\n</code> when a <code>\r</code>
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precedes it.</p>
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</div><section id="variant.WordAscii" class="variant"><a href="#variant.WordAscii" class="anchor">§</a><h3 class="code-header">WordAscii = 64</h3></section><div class="docblock"><p>Match an ASCII-only word boundary. That is, this matches a position
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where the left adjacent character and right adjacent character
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correspond to a word and non-word or a non-word and word character.</p>
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</div><section id="variant.WordAsciiNegate" class="variant"><a href="#variant.WordAsciiNegate" class="anchor">§</a><h3 class="code-header">WordAsciiNegate = 128</h3></section><div class="docblock"><p>Match an ASCII-only negation of a word boundary.</p>
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</div><section id="variant.WordUnicode" class="variant"><a href="#variant.WordUnicode" class="anchor">§</a><h3 class="code-header">WordUnicode = 256</h3></section><div class="docblock"><p>Match a Unicode-aware word boundary. That is, this matches a position
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where the left adjacent character and right adjacent character
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correspond to a word and non-word or a non-word and word character.</p>
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</div><section id="variant.WordUnicodeNegate" class="variant"><a href="#variant.WordUnicodeNegate" class="anchor">§</a><h3 class="code-header">WordUnicodeNegate = 512</h3></section><div class="docblock"><p>Match a Unicode-aware negation of a word boundary.</p>
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</div><section id="variant.WordStartAscii" class="variant"><a href="#variant.WordStartAscii" class="anchor">§</a><h3 class="code-header">WordStartAscii = 1_024</h3></section><div class="docblock"><p>Match the start of an ASCII-only word boundary. That is, this matches a
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position at either the beginning of the haystack or where the previous
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character is not a word character and the following character is a word
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character.</p>
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</div><section id="variant.WordEndAscii" class="variant"><a href="#variant.WordEndAscii" class="anchor">§</a><h3 class="code-header">WordEndAscii = 2_048</h3></section><div class="docblock"><p>Match the end of an ASCII-only word boundary. That is, this matches
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a position at either the end of the haystack or where the previous
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character is a word character and the following character is not a word
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character.</p>
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</div><section id="variant.WordStartUnicode" class="variant"><a href="#variant.WordStartUnicode" class="anchor">§</a><h3 class="code-header">WordStartUnicode = 4_096</h3></section><div class="docblock"><p>Match the start of a Unicode word boundary. That is, this matches a
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position at either the beginning of the haystack or where the previous
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character is not a word character and the following character is a word
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character.</p>
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</div><section id="variant.WordEndUnicode" class="variant"><a href="#variant.WordEndUnicode" class="anchor">§</a><h3 class="code-header">WordEndUnicode = 8_192</h3></section><div class="docblock"><p>Match the end of a Unicode word boundary. That is, this matches a
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position at either the end of the haystack or where the previous
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character is a word character and the following character is not a word
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character.</p>
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</div><section id="variant.WordStartHalfAscii" class="variant"><a href="#variant.WordStartHalfAscii" class="anchor">§</a><h3 class="code-header">WordStartHalfAscii = 16_384</h3></section><div class="docblock"><p>Match the start half of an ASCII-only word boundary. That is, this
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matches a position at either the beginning of the haystack or where the
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previous character is not a word character.</p>
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</div><section id="variant.WordEndHalfAscii" class="variant"><a href="#variant.WordEndHalfAscii" class="anchor">§</a><h3 class="code-header">WordEndHalfAscii = 32_768</h3></section><div class="docblock"><p>Match the end half of an ASCII-only word boundary. That is, this
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matches a position at either the end of the haystack or where the
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following character is not a word character.</p>
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</div><section id="variant.WordStartHalfUnicode" class="variant"><a href="#variant.WordStartHalfUnicode" class="anchor">§</a><h3 class="code-header">WordStartHalfUnicode = 65_536</h3></section><div class="docblock"><p>Match the start half of a Unicode word boundary. That is, this matches
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a position at either the beginning of the haystack or where the
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previous character is not a word character.</p>
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</div><section id="variant.WordEndHalfUnicode" class="variant"><a href="#variant.WordEndHalfUnicode" class="anchor">§</a><h3 class="code-header">WordEndHalfUnicode = 131_072</h3></section><div class="docblock"><p>Match the end half of a Unicode word boundary. That is, this matches
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a position at either the end of the haystack or where the following
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character is not a word 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-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#137-236">source</a><a href="#impl-Look" class="anchor">§</a><h3 class="code-header">impl <a class="enum" href="enum.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.reversed" class="method"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#144-165">source</a><h4 class="code-header">pub const fn <a href="#method.reversed" class="fn">reversed</a>(self) -> <a class="enum" href="enum.Look.html" title="enum regex_automata::util::look::Look">Look</a></h4></section></summary><div class="docblock"><p>Flip the look-around assertion to its equivalent for reverse searches.
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For example, <code>StartLF</code> gets translated to <code>EndLF</code>.</p>
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<p>Some assertions, such as <code>WordUnicode</code>, remain the same since they
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match the same positions regardless of the direction of the search.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.as_repr" class="method"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#172-176">source</a><h4 class="code-header">pub const fn <a href="#method.as_repr" class="fn">as_repr</a>(self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u32.html">u32</a></h4></section></summary><div class="docblock"><p>Return the underlying representation of this look-around enumeration
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as an integer. Giving the return value to the <a href="enum.Look.html#method.from_repr" title="associated function regex_automata::util::look::Look::from_repr"><code>Look::from_repr</code></a>
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constructor is guaranteed to return the same look-around variant that
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one started with within a semver compatible release of this crate.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.from_repr" class="method"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#182-204">source</a><h4 class="code-header">pub const fn <a href="#method.from_repr" class="fn">from_repr</a>(repr: <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u32.html">u32</a>) -> <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="enum" href="enum.Look.html" title="enum regex_automata::util::look::Look">Look</a>></h4></section></summary><div class="docblock"><p>Given the underlying representation of a <code>Look</code> value, return the
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corresponding <code>Look</code> value if the representation is valid. Otherwise
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<code>None</code> is returned.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.as_char" class="method"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#214-235">source</a><h4 class="code-header">pub const fn <a href="#method.as_char" class="fn">as_char</a>(self) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.char.html">char</a></h4></section></summary><div class="docblock"><p>Returns a convenient single codepoint representation of this
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look-around assertion. Each assertion is guaranteed to be represented
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by a distinct character.</p>
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<p>This is useful for succinctly representing a look-around assertion in
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human friendly but succinct output intended for a programmer working on
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regex internals.</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-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#impl-Clone-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</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_automata/util/look.rs.html#61">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.Look.html" title="enum regex_automata::util::look::Look">Look</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-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#impl-Debug-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</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_automata/util/look.rs.html#61">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-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#impl-PartialEq-for-Look" 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::PartialEq">PartialEq</a> for <a class="enum" href="enum.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.eq" class="method trait-impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#method.eq" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/cmp/trait.PartialEq.html#tymethod.eq" class="fn">eq</a>(&self, other: &<a class="enum" href="enum.Look.html" title="enum regex_automata::util::look::Look">Look</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>self</code> and <code>other</code> values to be equal, and is used
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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-Copy-for-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#impl-Copy-for-Look" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> for <a class="enum" href="enum.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section><section id="impl-Eq-for-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#impl-Eq-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section><section id="impl-StructuralEq-for-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#impl-StructuralEq-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section><section id="impl-StructuralPartialEq-for-Look" class="impl"><a class="src rightside" href="../../../src/regex_automata/util/look.rs.html#61">source</a><a href="#impl-StructuralPartialEq-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</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-Look" class="impl"><a href="#impl-RefUnwindSafe-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section><section id="impl-Send-for-Look" class="impl"><a href="#impl-Send-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section><section id="impl-Sync-for-Look" class="impl"><a href="#impl-Sync-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section><section id="impl-Unpin-for-Look" class="impl"><a href="#impl-Unpin-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</a></h3></section><section id="impl-UnwindSafe-for-Look" class="impl"><a href="#impl-UnwindSafe-for-Look" 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.Look.html" title="enum regex_automata::util::look::Look">Look</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-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
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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> |