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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 builder for configuring an Aho-Corasick automaton."><title>AhoCorasickBuilder in aho_corasick - Rust</title><script> if (window.location.protocol !== "file:") document.write(`<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">`)</script><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-e935ef01ae1c1829.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="aho_corasick" data-themes="" data-resource-suffix="" data-rustdoc-version="1.78.0 (9b00956e5 2024-04-29)" data-channel="1.78.0" data-search-js="search-42d8da7a6b9792c2.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-4c98445ec4002617.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-12cf3b4f4f9dc36d.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-04d5337699b92874.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 struct"><!--[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" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../aho_corasick/index.html">aho_corasick</a><span class="version">1.1.3</span></h2></div><h2 class="location"><a href="#">AhoCorasickBuilder</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.ascii_case_insensitive">ascii_case_insensitive</a></li><li><a href="#method.build">build</a></li><li><a href="#method.byte_classes">byte_classes</a></li><li><a href="#method.dense_depth">dense_depth</a></li><li><a href="#method.kind">kind</a></li><li><a href="#method.match_kind">match_kind</a></li><li><a href="#method.new">new</a></li><li><a href="#method.prefilter">prefilter</a></li><li><a href="#method.start_kind">start_kind</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-AhoCorasickBuilder">Clone</a></li><li><a href="#impl-Debug-for-AhoCorasickBuilder">Debug</a></li><li><a href="#impl-Default-for-AhoCorasickBuilder">Default</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Freeze-for-AhoCorasickBuilder">Freeze</a></li><li><a href="#impl-RefUnwindSafe-for-AhoCorasickBuilder">RefUnwindSafe</a></li><li><a href="#impl-Send-for-AhoCorasickBuilder">Send</a></li><li><a href="#impl-Sync-for-AhoCorasickBuilder">Sync</a></li><li><a href="#impl-Unpin-for-AhoCorasickBuilder">Unpin</a></li><li><a href="#impl-UnwindSafe-for-AhoCorasickBuilder">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&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3CT%3E-for-T">From&lt;T&gt;</a></li><li><a href="#impl-Into%3CU%3E-for-T">Into&lt;U&gt;</a></li><li><a href="#impl-ToOwned-for-T">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom&lt;U&gt;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto&lt;U&gt;</a></li></ul></section><h2><a href="index.html">In crate aho_corasick</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../aho_corasick/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>Struct <a href="index.html">aho_corasick</a>::<wbr><a class="struct" href="#">AhoCorasickBuilder</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/aho_corasick/ahocorasick.rs.html#2135-2141">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub struct AhoCorasickBuilder { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A builder for configuring an Aho-Corasick automaton.</p>
<h2 id="quick-advice"><a class="doc-anchor" href="#quick-advice">§</a>Quick advice</h2>
<ul>
<li>Use <a href="struct.AhoCorasickBuilder.html#method.match_kind" title="method aho_corasick::AhoCorasickBuilder::match_kind"><code>AhoCorasickBuilder::match_kind</code></a> to configure your searcher
with <a href="enum.MatchKind.html#variant.LeftmostFirst" title="variant aho_corasick::MatchKind::LeftmostFirst"><code>MatchKind::LeftmostFirst</code></a> if you want to match how backtracking
regex engines execute searches for <code>pat1|pat2|..|patN</code>. Use
<a href="enum.MatchKind.html#variant.LeftmostLongest" title="variant aho_corasick::MatchKind::LeftmostLongest"><code>MatchKind::LeftmostLongest</code></a> if you want to match how POSIX regex engines
do it.</li>
<li>If you need an anchored search, use <a href="struct.AhoCorasickBuilder.html#method.start_kind" title="method aho_corasick::AhoCorasickBuilder::start_kind"><code>AhoCorasickBuilder::start_kind</code></a> to
set the <a href="enum.StartKind.html#variant.Anchored" title="variant aho_corasick::StartKind::Anchored"><code>StartKind::Anchored</code></a> mode since <a href="enum.StartKind.html#variant.Unanchored" title="variant aho_corasick::StartKind::Unanchored"><code>StartKind::Unanchored</code></a> is the
default. Or just use <a href="enum.StartKind.html#variant.Both" title="variant aho_corasick::StartKind::Both"><code>StartKind::Both</code></a> to support both types of searches.</li>
<li>You might want to use <a href="struct.AhoCorasickBuilder.html#method.kind" title="method aho_corasick::AhoCorasickBuilder::kind"><code>AhoCorasickBuilder::kind</code></a> to set your searcher
to always use a <a href="enum.AhoCorasickKind.html#variant.DFA" title="variant aho_corasick::AhoCorasickKind::DFA"><code>AhoCorasickKind::DFA</code></a> if search speed is critical and
memory usage isn’t a concern. Otherwise, not setting a kind will probably
make the right choice for you. Beware that if you use <a href="enum.StartKind.html#variant.Both" title="variant aho_corasick::StartKind::Both"><code>StartKind::Both</code></a>
to build a searcher that supports both unanchored and anchored searches
<em>and</em> you set <a href="enum.AhoCorasickKind.html#variant.DFA" title="variant aho_corasick::AhoCorasickKind::DFA"><code>AhoCorasickKind::DFA</code></a>, then the DFA will essentially be
duplicated to support both simultaneously. This results in very high memory
usage.</li>
<li>For all other options, their defaults are almost certainly what you want.</li>
</ul>
</div></details><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-AhoCorasickBuilder" class="impl"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2143-2617">source</a><a href="#impl-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2148-2150">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>() -&gt; <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>Create a new builder for configuring an Aho-Corasick automaton.</p>
<p>The builder provides a way to configure a number of things, including
ASCII case insensitivity and what kind of match semantics are used.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.build" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2171-2207">source</a><h4 class="code-header">pub fn <a href="#method.build" class="fn">build</a>&lt;I, P&gt;(&amp;self, patterns: I) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.78.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="struct" href="struct.AhoCorasick.html" title="struct aho_corasick::AhoCorasick">AhoCorasick</a>, <a class="struct" href="struct.BuildError.html" title="struct aho_corasick::BuildError">BuildError</a>&gt;<div class="where">where
I: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>&lt;Item = P&gt;,
P: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;[<a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.u8.html">u8</a>]&gt;,</div></h4></section></summary><div class="docblock"><p>Build an Aho-Corasick automaton using the configuration set on this
builder.</p>
<p>A builder may be reused to create more automatons.</p>
<h5 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h5>
<p>Basic usage:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>aho_corasick::{AhoCorasickBuilder, PatternID};
<span class="kw">let </span>patterns = <span class="kw-2">&amp;</span>[<span class="string">"foo"</span>, <span class="string">"bar"</span>, <span class="string">"baz"</span>];
<span class="kw">let </span>ac = AhoCorasickBuilder::new().build(patterns).unwrap();
<span class="macro">assert_eq!</span>(
<span class="prelude-val">Some</span>(PatternID::must(<span class="number">1</span>)),
ac.find(<span class="string">"xxx bar xxx"</span>).map(|m| m.pattern()),
);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.match_kind" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2342-2347">source</a><h4 class="code-header">pub fn <a href="#method.match_kind" class="fn">match_kind</a>(&amp;mut self, kind: <a class="enum" href="enum.MatchKind.html" title="enum aho_corasick::MatchKind">MatchKind</a>) -&gt; &amp;mut <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>Set the desired match semantics.</p>
<p>The default is <a href="enum.MatchKind.html#variant.Standard" title="variant aho_corasick::MatchKind::Standard"><code>MatchKind::Standard</code></a>, which corresponds to the match
semantics supported by the standard textbook description of the
Aho-Corasick algorithm. Namely, matches are reported as soon as they
are found. Moreover, this is the only way to get overlapping matches
or do stream searching.</p>
<p>The other kinds of match semantics that are supported are
<a href="enum.MatchKind.html#variant.LeftmostFirst" title="variant aho_corasick::MatchKind::LeftmostFirst"><code>MatchKind::LeftmostFirst</code></a> and <a href="enum.MatchKind.html#variant.LeftmostLongest" title="variant aho_corasick::MatchKind::LeftmostLongest"><code>MatchKind::LeftmostLongest</code></a>. The
former corresponds to the match you would get if you were to try to
match each pattern at each position in the haystack in the same order
that you give to the automaton. That is, it returns the leftmost match
corresponding to the earliest pattern given to the automaton. The
latter corresponds to finding the longest possible match among all
leftmost matches.</p>
<p>For more details on match semantics, see the <a href="enum.MatchKind.html" title="enum aho_corasick::MatchKind">documentation for
<code>MatchKind</code></a>.</p>
<p>Note that setting this to <a href="enum.MatchKind.html#variant.LeftmostFirst" title="variant aho_corasick::MatchKind::LeftmostFirst"><code>MatchKind::LeftmostFirst</code></a> or
<a href="enum.MatchKind.html#variant.LeftmostLongest" title="variant aho_corasick::MatchKind::LeftmostLongest"><code>MatchKind::LeftmostLongest</code></a> will cause some search routines on
<a href="struct.AhoCorasick.html" title="struct aho_corasick::AhoCorasick"><code>AhoCorasick</code></a> to return an error (or panic if you’re using the
infallible API). Notably, this includes stream and overlapping
searches.</p>
<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
<p>In these examples, we demonstrate the differences between match
semantics for a particular set of patterns in a specific order:
<code>b</code>, <code>abc</code>, <code>abcd</code>.</p>
<p>Standard semantics:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>aho_corasick::{AhoCorasick, MatchKind};
<span class="kw">let </span>patterns = <span class="kw-2">&amp;</span>[<span class="string">"b"</span>, <span class="string">"abc"</span>, <span class="string">"abcd"</span>];
<span class="kw">let </span>haystack = <span class="string">"abcd"</span>;
<span class="kw">let </span>ac = AhoCorasick::builder()
.match_kind(MatchKind::Standard) <span class="comment">// default, not necessary
</span>.build(patterns)
.unwrap();
<span class="kw">let </span>mat = ac.find(haystack).expect(<span class="string">"should have a match"</span>);
<span class="macro">assert_eq!</span>(<span class="string">"b"</span>, <span class="kw-2">&amp;</span>haystack[mat.start()..mat.end()]);</code></pre></div>
<p>Leftmost-first semantics:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>aho_corasick::{AhoCorasick, MatchKind};
<span class="kw">let </span>patterns = <span class="kw-2">&amp;</span>[<span class="string">"b"</span>, <span class="string">"abc"</span>, <span class="string">"abcd"</span>];
<span class="kw">let </span>haystack = <span class="string">"abcd"</span>;
<span class="kw">let </span>ac = AhoCorasick::builder()
.match_kind(MatchKind::LeftmostFirst)
.build(patterns)
.unwrap();
<span class="kw">let </span>mat = ac.find(haystack).expect(<span class="string">"should have a match"</span>);
<span class="macro">assert_eq!</span>(<span class="string">"abc"</span>, <span class="kw-2">&amp;</span>haystack[mat.start()..mat.end()]);</code></pre></div>
<p>Leftmost-longest semantics:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>aho_corasick::{AhoCorasick, MatchKind};
<span class="kw">let </span>patterns = <span class="kw-2">&amp;</span>[<span class="string">"b"</span>, <span class="string">"abc"</span>, <span class="string">"abcd"</span>];
<span class="kw">let </span>haystack = <span class="string">"abcd"</span>;
<span class="kw">let </span>ac = AhoCorasick::builder()
.match_kind(MatchKind::LeftmostLongest)
.build(patterns)
.unwrap();
<span class="kw">let </span>mat = ac.find(haystack).expect(<span class="string">"should have a match"</span>);
<span class="macro">assert_eq!</span>(<span class="string">"abcd"</span>, <span class="kw-2">&amp;</span>haystack[mat.start()..mat.end()]);</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.start_kind" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2437-2441">source</a><h4 class="code-header">pub fn <a href="#method.start_kind" class="fn">start_kind</a>(&amp;mut self, kind: <a class="enum" href="enum.StartKind.html" title="enum aho_corasick::StartKind">StartKind</a>) -&gt; &amp;mut <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>Sets the starting state configuration for the automaton.</p>
<p>Every Aho-Corasick automaton is capable of having two start states: one
that is used for unanchored searches and one that is used for anchored
searches. Some automatons, like the NFAs, support this with almost zero
additional cost. Other automatons, like the DFA, require two copies of
the underlying transition table to support both simultaneously.</p>
<p>Because there may be an added non-trivial cost to supporting both, it
is possible to configure which starting state configuration is needed.</p>
<p>Indeed, since anchored searches tend to be somewhat more rare,
<em>only</em> unanchored searches are supported by default. Thus,
<a href="enum.StartKind.html#variant.Unanchored" title="variant aho_corasick::StartKind::Unanchored"><code>StartKind::Unanchored</code></a> is the default.</p>
<p>Note that when this is set to <a href="enum.StartKind.html#variant.Unanchored" title="variant aho_corasick::StartKind::Unanchored"><code>StartKind::Unanchored</code></a>, then
running an anchored search will result in an error (or a panic
if using the infallible APIs). Similarly, when this is set to
<a href="enum.StartKind.html#variant.Anchored" title="variant aho_corasick::StartKind::Anchored"><code>StartKind::Anchored</code></a>, then running an unanchored search will
result in an error (or a panic if using the infallible APIs). When
<a href="enum.StartKind.html#variant.Both" title="variant aho_corasick::StartKind::Both"><code>StartKind::Both</code></a> is used, then both unanchored and anchored searches
are always supported.</p>
<p>Also note that even if an <code>AhoCorasick</code> searcher is using an NFA
internally (which always supports both unanchored and anchored
searches), an error will still be reported for a search that isn’t
supported by the configuration set via this method. This means,
for example, that an error is never dependent on which internal
implementation of Aho-Corasick is used.</p>
<h5 id="example-anchored-search"><a class="doc-anchor" href="#example-anchored-search">§</a>Example: anchored search</h5>
<p>This shows how to build a searcher that only supports anchored
searches:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>aho_corasick::{
AhoCorasick, Anchored, Input, Match, MatchKind, StartKind,
};
<span class="kw">let </span>ac = AhoCorasick::builder()
.match_kind(MatchKind::LeftmostFirst)
.start_kind(StartKind::Anchored)
.build(<span class="kw-2">&amp;</span>[<span class="string">"b"</span>, <span class="string">"abc"</span>, <span class="string">"abcd"</span>])
.unwrap();
<span class="comment">// An unanchored search is not supported! An error here is guaranteed
// given the configuration above regardless of which kind of
// Aho-Corasick implementation ends up being used internally.
</span><span class="kw">let </span>input = Input::new(<span class="string">"foo abcd"</span>).anchored(Anchored::No);
<span class="macro">assert!</span>(ac.try_find(input).is_err());
<span class="kw">let </span>input = Input::new(<span class="string">"foo abcd"</span>).anchored(Anchored::Yes);
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, ac.try_find(input)<span class="question-mark">?</span>);
<span class="kw">let </span>input = Input::new(<span class="string">"abcd"</span>).anchored(Anchored::Yes);
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(Match::must(<span class="number">1</span>, <span class="number">0</span>..<span class="number">3</span>)), ac.try_find(input)<span class="question-mark">?</span>);
</code></pre></div>
<h5 id="example-unanchored-and-anchored-searches"><a class="doc-anchor" href="#example-unanchored-and-anchored-searches">§</a>Example: unanchored and anchored searches</h5>
<p>This shows how to build a searcher that supports both unanchored and
anchored searches:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>aho_corasick::{
AhoCorasick, Anchored, Input, Match, MatchKind, StartKind,
};
<span class="kw">let </span>ac = AhoCorasick::builder()
.match_kind(MatchKind::LeftmostFirst)
.start_kind(StartKind::Both)
.build(<span class="kw-2">&amp;</span>[<span class="string">"b"</span>, <span class="string">"abc"</span>, <span class="string">"abcd"</span>])
.unwrap();
<span class="kw">let </span>input = Input::new(<span class="string">"foo abcd"</span>).anchored(Anchored::No);
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(Match::must(<span class="number">1</span>, <span class="number">4</span>..<span class="number">7</span>)), ac.try_find(input)<span class="question-mark">?</span>);
<span class="kw">let </span>input = Input::new(<span class="string">"foo abcd"</span>).anchored(Anchored::Yes);
<span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, ac.try_find(input)<span class="question-mark">?</span>);
<span class="kw">let </span>input = Input::new(<span class="string">"abcd"</span>).anchored(Anchored::Yes);
<span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(Match::must(<span class="number">1</span>, <span class="number">0</span>..<span class="number">3</span>)), ac.try_find(input)<span class="question-mark">?</span>);
</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.ascii_case_insensitive" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2474-2482">source</a><h4 class="code-header">pub fn <a href="#method.ascii_case_insensitive" class="fn">ascii_case_insensitive</a>(&amp;mut self, yes: <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a>) -&gt; &amp;mut <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>Enable ASCII-aware case insensitive matching.</p>
<p>When this option is enabled, searching will be performed without
respect to case for ASCII letters (<code>a-z</code> and <code>A-Z</code>) only.</p>
<p>Enabling this option does not change the search algorithm, but it may
increase the size of the automaton.</p>
<p><strong>NOTE:</strong> It is unlikely that support for Unicode case folding will
be added in the future. The ASCII case works via a simple hack to the
underlying automaton, but full Unicode handling requires a fair bit of
sophistication. If you do need Unicode handling, you might consider
using the <a href="https://docs.rs/regex"><code>regex</code> crate</a> or the lower level
<a href="https://docs.rs/regex-automata"><code>regex-automata</code> crate</a>.</p>
<h5 id="examples-2"><a class="doc-anchor" href="#examples-2">§</a>Examples</h5>
<p>Basic usage:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>aho_corasick::AhoCorasick;
<span class="kw">let </span>patterns = <span class="kw-2">&amp;</span>[<span class="string">"FOO"</span>, <span class="string">"bAr"</span>, <span class="string">"BaZ"</span>];
<span class="kw">let </span>haystack = <span class="string">"foo bar baz"</span>;
<span class="kw">let </span>ac = AhoCorasick::builder()
.ascii_case_insensitive(<span class="bool-val">true</span>)
.build(patterns)
.unwrap();
<span class="macro">assert_eq!</span>(<span class="number">3</span>, ac.find_iter(haystack).count());</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.kind" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2527-2533">source</a><h4 class="code-header">pub fn <a href="#method.kind" class="fn">kind</a>(&amp;mut self, kind: <a class="enum" href="https://doc.rust-lang.org/1.78.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="enum.AhoCorasickKind.html" title="enum aho_corasick::AhoCorasickKind">AhoCorasickKind</a>&gt;) -&gt; &amp;mut <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>Choose the type of underlying automaton to use.</p>
<p>Currently, there are four choices:</p>
<ul>
<li><a href="enum.AhoCorasickKind.html#variant.NoncontiguousNFA" title="variant aho_corasick::AhoCorasickKind::NoncontiguousNFA"><code>AhoCorasickKind::NoncontiguousNFA</code></a> instructs the searcher to
use a <a href="nfa/noncontiguous/struct.NFA.html" title="struct aho_corasick::nfa::noncontiguous::NFA"><code>noncontiguous::NFA</code></a>. A noncontiguous NFA is the fastest to
be built, has moderate memory usage and is typically the slowest to
execute a search.</li>
<li><a href="enum.AhoCorasickKind.html#variant.ContiguousNFA" title="variant aho_corasick::AhoCorasickKind::ContiguousNFA"><code>AhoCorasickKind::ContiguousNFA</code></a> instructs the searcher to use a
<a href="nfa/contiguous/struct.NFA.html" title="struct aho_corasick::nfa::contiguous::NFA"><code>contiguous::NFA</code></a>. A contiguous NFA is a little slower to build than
a noncontiguous NFA, has excellent memory usage and is typically a
little slower than a DFA for a search.</li>
<li><a href="enum.AhoCorasickKind.html#variant.DFA" title="variant aho_corasick::AhoCorasickKind::DFA"><code>AhoCorasickKind::DFA</code></a> instructs the searcher to use a
<a href="dfa/struct.DFA.html" title="struct aho_corasick::dfa::DFA"><code>dfa::DFA</code></a>. A DFA is very slow to build, uses exorbitant amounts of
memory, but will typically execute searches the fastest.</li>
<li><code>None</code> (the default) instructs the searcher to choose the “best”
Aho-Corasick implementation. This choice is typically based primarily
on the number of patterns.</li>
</ul>
<p>Setting this configuration does not change the time complexity for
constructing the Aho-Corasick automaton (which is <code>O(p)</code> where <code>p</code>
is the total number of patterns being compiled). Setting this to
<a href="enum.AhoCorasickKind.html#variant.DFA" title="variant aho_corasick::AhoCorasickKind::DFA"><code>AhoCorasickKind::DFA</code></a> does however reduce the time complexity of
non-overlapping searches from <code>O(n + p)</code> to <code>O(n)</code>, where <code>n</code> is the
length of the haystack.</p>
<p>In general, you should probably stick to the default unless you have
some kind of reason to use a specific Aho-Corasick implementation. For
example, you might choose <code>AhoCorasickKind::DFA</code> if you don’t care
about memory usage and want the fastest possible search times.</p>
<p>Setting this guarantees that the searcher returned uses the chosen
implementation. If that implementation could not be constructed, then
an error will be returned. In contrast, when <code>None</code> is used, it is
possible for it to attempt to construct, for example, a contiguous
NFA and have it fail. In which case, it will fall back to using a
noncontiguous NFA.</p>
<p>If <code>None</code> is given, then one may use <a href="struct.AhoCorasick.html#method.kind" title="method aho_corasick::AhoCorasick::kind"><code>AhoCorasick::kind</code></a> to determine
which Aho-Corasick implementation was chosen.</p>
<p>Note that the heuristics used for choosing which <code>AhoCorasickKind</code>
may be changed in a semver compatible release.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.prefilter" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2547-2552">source</a><h4 class="code-header">pub fn <a href="#method.prefilter" class="fn">prefilter</a>(&amp;mut self, yes: <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a>) -&gt; &amp;mut <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>Enable heuristic prefilter optimizations.</p>
<p>When enabled, searching will attempt to quickly skip to match
candidates using specialized literal search routines. A prefilter
cannot always be used, and is generally treated as a heuristic. It
can be useful to disable this if the prefilter is observed to be
sub-optimal for a particular workload.</p>
<p>Currently, prefilters are typically only active when building searchers
with a small (less than 100) number of patterns.</p>
<p>This is enabled by default.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.dense_depth" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2581-2585">source</a><h4 class="code-header">pub fn <a href="#method.dense_depth" class="fn">dense_depth</a>(&amp;mut self, depth: <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.usize.html">usize</a>) -&gt; &amp;mut <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>Set the limit on how many states use a dense representation for their
transitions. Other states will generally use a sparse representation.</p>
<p>A dense representation uses more memory but is generally faster, since
the next transition in a dense representation can be computed in a
constant number of instructions. A sparse representation uses less
memory but is generally slower, since the next transition in a sparse
representation requires executing a variable number of instructions.</p>
<p>This setting is only used when an Aho-Corasick implementation is used
that supports the dense versus sparse representation trade off. Not all
do.</p>
<p>This limit is expressed in terms of the depth of a state, i.e., the
number of transitions from the starting state of the automaton. The
idea is that most of the time searching will be spent near the starting
state of the automaton, so states near the start state should use a
dense representation. States further away from the start state would
then use a sparse representation.</p>
<p>By default, this is set to a low but non-zero number. Setting this to
<code>0</code> is almost never what you want, since it is likely to make searches
very slow due to the start state itself being forced to use a sparse
representation. However, it is unlikely that increasing this number
will help things much, since the most active states have a small depth.
More to the point, the memory usage increases superlinearly as this
number increases.</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.byte_classes" class="method"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2612-2616">source</a><h4 class="code-header">pub fn <a href="#method.byte_classes" class="fn">byte_classes</a>(&amp;mut self, yes: <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.bool.html">bool</a>) -&gt; &amp;mut <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class="docblock"><p>A debug settting for whether to attempt to shrink the size of the
automaton’s alphabet or not.</p>
<p>This option is enabled by default and should never be disabled unless
one is debugging the underlying automaton.</p>
<p>When enabled, some (but not all) Aho-Corasick automatons will use a map
from all possible bytes to their corresponding equivalence class. Each
equivalence class represents a set of bytes that does not discriminate
between a match and a non-match in the automaton.</p>
<p>The advantage of this map is that the size of the transition table can
be reduced drastically from <code>#states * 256 * sizeof(u32)</code> to
<code>#states * k * sizeof(u32)</code> where <code>k</code> is the number of equivalence
classes (rounded up to the nearest power of 2). As a result, total
space usage can decrease substantially. Moreover, since a smaller
alphabet is used, automaton compilation becomes faster as well.</p>
<p><strong>WARNING:</strong> This is only useful for debugging automatons. Disabling
this does not yield any speed advantages. Namely, even when this is
disabled, a byte class map is still used while searching. The only
difference is that every byte will be forced into its own distinct
equivalence class. This is useful for debugging the actual generated
transitions because it lets one see the transitions defined on actual
bytes instead of the equivalence classes.</p>
</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-AhoCorasickBuilder" class="impl"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2134">source</a><a href="#impl-Clone-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</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/aho_corasick/ahocorasick.rs.html#2134">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&amp;self) -&gt; <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.reference.html">&amp;Self</a>)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.78.0/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-AhoCorasickBuilder" class="impl"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2134">source</a><a href="#impl-Debug-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</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/aho_corasick/ahocorasick.rs.html#2134">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/fmt/trait.Debug.html#tymethod.fmt" class="fn">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/1.78.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-AhoCorasickBuilder" class="impl"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2134">source</a><a href="#impl-Default-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../src/aho_corasick/ahocorasick.rs.html#2134">source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -&gt; <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/1.78.0/core/default/trait.Default.html#tymethod.default">Read more</a></div></details></div></details></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-Freeze-for-AhoCorasickBuilder" class="impl"><a href="#impl-Freeze-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h3></section><section id="impl-RefUnwindSafe-for-AhoCorasickBuilder" class="impl"><a href="#impl-RefUnwindSafe-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h3></section><section id="impl-Send-for-AhoCorasickBuilder" class="impl"><a href="#impl-Send-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h3></section><section id="impl-Sync-for-AhoCorasickBuilder" class="impl"><a href="#impl-Sync-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h3></section><section id="impl-Unpin-for-AhoCorasickBuilder" class="impl"><a href="#impl-Unpin-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</a></h3></section><section id="impl-UnwindSafe-for-AhoCorasickBuilder" class="impl"><a href="#impl-UnwindSafe-for-AhoCorasickBuilder" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.AhoCorasickBuilder.html" title="struct aho_corasick::AhoCorasickBuilder">AhoCorasickBuilder</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/1.78.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.reference.html">&amp;T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.78.0/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/1.78.0/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<div class="where">where
T: ?<a class="trait" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.reference.html">&amp;mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#765">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; 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/1.78.0/src/core/convert/mod.rs.html#768">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</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/1.78.0/src/core/convert/mod.rs.html#748-750">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</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/1.78.0/src/core/convert/mod.rs.html#758">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -&gt; U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
<p>That is, this conversion is whatever the implementation of
<code><a href="https://doc.rust-lang.org/1.78.0/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for U</code> chooses to do.</p>
</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/1.78.0/src/alloc/borrow.rs.html#83-85">source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where
T: <a class="trait" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/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/1.78.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&amp;self) -&gt; T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.78.0/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/1.78.0/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/1.78.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&amp;self, target: <a class="primitive" href="https://doc.rust-lang.org/1.78.0/std/primitive.reference.html">&amp;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/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#805-807">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,</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/1.78.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#812">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.78.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</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/1.78.0/src/core/convert/mod.rs.html#790-792">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<div class="where">where
U: <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</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/1.78.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.78.0/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/1.78.0/src/core/convert/mod.rs.html#797">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.78.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/1.78.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
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