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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 compiling an NFA from a regex’s high-level intermediate representation (HIR)."><title>Compiler in regex_automata::nfa::thompson - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="regex_automata" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc 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">☰</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="#">Compiler</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.build">build</a></li><li><a href="#method.build_from_hir">build_from_hir</a></li><li><a href="#method.build_many">build_many</a></li><li><a href="#method.build_many_from_hir">build_many_from_hir</a></li><li><a href="#method.configure">configure</a></li><li><a href="#method.new">new</a></li><li><a href="#method.syntax">syntax</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-Compiler">Clone</a></li><li><a href="#impl-Debug-for-Compiler">Debug</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-Compiler">!RefUnwindSafe</a></li><li><a href="#impl-Sync-for-Compiler">!Sync</a></li><li><a href="#impl-Send-for-Compiler">Send</a></li><li><a href="#impl-Unpin-for-Compiler">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Compiler">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::nfa::thompson</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>Struct <a href="../../index.html">regex_automata</a>::<wbr><a href="../index.html">nfa</a>::<wbr><a href="index.html">thompson</a>::<wbr><a class="struct" href="#">Compiler</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/nfa/thompson/compiler.rs.html#696-714">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub struct Compiler { <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 compiling an NFA from a regex’s high-level intermediate
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representation (HIR).</p>
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<p>This compiler provides a way to translate a parsed regex pattern into an
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NFA state graph. The NFA state graph can either be used directly to execute
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a search (e.g., with a Pike VM), or it can be further used to build a DFA.</p>
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<p>This compiler provides APIs both for compiling regex patterns directly from
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their concrete syntax, or via a <a href="../../../regex_syntax/hir/struct.Hir.html" title="struct regex_syntax::hir::Hir"><code>regex_syntax::hir::Hir</code></a>.</p>
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<p>This compiler has various options that may be configured via
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<a href="struct.Config.html" title="struct regex_automata::nfa::thompson::Config"><code>thompson::Config</code></a>.</p>
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<p>Note that a compiler is not the same as a <a href="struct.Builder.html" title="struct regex_automata::nfa::thompson::Builder"><code>thompson::Builder</code></a>.
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A <code>Builder</code> provides a lower level API that is uncoupled from a regex
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pattern’s concrete syntax or even its HIR. Instead, it permits stitching
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together an NFA by hand. See its docs for examples.</p>
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<h2 id="example-compilation-from-concrete-syntax"><a href="#example-compilation-from-concrete-syntax">Example: compilation from concrete syntax</a></h2>
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<p>This shows how to compile an NFA from a pattern string while setting a size
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limit on how big the NFA is allowed to be (in terms of bytes of heap used).</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::{
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nfa::thompson::{NFA, pikevm::PikeVM},
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Match,
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};
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<span class="kw">let </span>config = NFA::config().nfa_size_limit(<span class="prelude-val">Some</span>(<span class="number">1_000</span>));
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<span class="kw">let </span>nfa = NFA::compiler().configure(config).build(<span class="string">r"(?-u)\w"</span>)<span class="question-mark">?</span>;
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<span class="kw">let </span>re = PikeVM::new_from_nfa(nfa)<span class="question-mark">?</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>cache = re.create_cache();
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<span class="kw">let </span><span class="kw-2">mut </span>caps = re.create_captures();
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<span class="kw">let </span>expected = <span class="prelude-val">Some</span>(Match::must(<span class="number">0</span>, <span class="number">3</span>..<span class="number">4</span>));
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re.captures(<span class="kw-2">&mut </span>cache, <span class="string">"!@#A#@!"</span>, <span class="kw-2">&mut </span>caps);
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<span class="macro">assert_eq!</span>(expected, caps.get_match());
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</code></pre></div>
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<h2 id="example-compilation-from-hir"><a href="#example-compilation-from-hir">Example: compilation from HIR</a></h2>
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<p>This shows how to hand assemble a regular expression via its HIR, and then
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compile an NFA directly from it.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::{nfa::thompson::{NFA, pikevm::PikeVM}, Match};
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<span class="kw">use </span>regex_syntax::hir::{Hir, Class, ClassBytes, ClassBytesRange};
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<span class="kw">let </span>hir = Hir::class(Class::Bytes(ClassBytes::new(<span class="macro">vec!</span>[
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ClassBytesRange::new(<span class="string">b'0'</span>, <span class="string">b'9'</span>),
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ClassBytesRange::new(<span class="string">b'A'</span>, <span class="string">b'Z'</span>),
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ClassBytesRange::new(<span class="string">b'_'</span>, <span class="string">b'_'</span>),
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ClassBytesRange::new(<span class="string">b'a'</span>, <span class="string">b'z'</span>),
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])));
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<span class="kw">let </span>config = NFA::config().nfa_size_limit(<span class="prelude-val">Some</span>(<span class="number">1_000</span>));
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<span class="kw">let </span>nfa = NFA::compiler().configure(config).build_from_hir(<span class="kw-2">&</span>hir)<span class="question-mark">?</span>;
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<span class="kw">let </span>re = PikeVM::new_from_nfa(nfa)<span class="question-mark">?</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>cache = re.create_cache();
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<span class="kw">let </span><span class="kw-2">mut </span>caps = re.create_captures();
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<span class="kw">let </span>expected = <span class="prelude-val">Some</span>(Match::must(<span class="number">0</span>, <span class="number">3</span>..<span class="number">4</span>));
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re.captures(<span class="kw-2">&mut </span>cache, <span class="string">"!@#A#@!"</span>, <span class="kw-2">&mut </span>caps);
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<span class="macro">assert_eq!</span>(expected, caps.get_match());
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</code></pre></div>
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</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-Compiler" class="impl"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#716-931">source</a><a href="#impl-Compiler" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</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/regex_automata/nfa/thompson/compiler.rs.html#718-727">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>() -> <a class="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</a></h4></section></summary><div class="docblock"><p>Create a new NFA builder with its default configuration.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.build" class="method"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#756-758">source</a><h4 class="code-header">pub fn <a href="#method.build" class="fn">build</a>(&self, pattern: &<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.NFA.html" title="struct regex_automata::nfa::thompson::NFA">NFA</a>, <a class="struct" href="struct.BuildError.html" title="struct regex_automata::nfa::thompson::BuildError">BuildError</a>></h4></section></summary><div class="docblock"><p>Compile the given regular expression pattern into an NFA.</p>
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<p>If there was a problem parsing the regex, then that error is returned.</p>
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<p>Otherwise, if there was a problem building the NFA, then an error is
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returned. The only error that can occur is if the compiled regex would
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exceed the size limits configured on this builder, or if any part of
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the NFA would exceed the integer representations used. (For example,
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too many states might plausibly occur on a 16-bit target.)</p>
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<h5 id="example"><a href="#example">Example</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::{nfa::thompson::{NFA, pikevm::PikeVM}, Match};
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<span class="kw">let </span>config = NFA::config().nfa_size_limit(<span class="prelude-val">Some</span>(<span class="number">1_000</span>));
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<span class="kw">let </span>nfa = NFA::compiler().configure(config).build(<span class="string">r"(?-u)\w"</span>)<span class="question-mark">?</span>;
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<span class="kw">let </span>re = PikeVM::new_from_nfa(nfa)<span class="question-mark">?</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>cache = re.create_cache();
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<span class="kw">let </span><span class="kw-2">mut </span>caps = re.create_captures();
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<span class="kw">let </span>expected = <span class="prelude-val">Some</span>(Match::must(<span class="number">0</span>, <span class="number">3</span>..<span class="number">4</span>));
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re.captures(<span class="kw-2">&mut </span>cache, <span class="string">"!@#A#@!"</span>, <span class="kw-2">&mut </span>caps);
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<span class="macro">assert_eq!</span>(expected, caps.get_match());
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</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.build_many" class="method"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#785-800">source</a><h4 class="code-header">pub fn <a href="#method.build_many" class="fn">build_many</a><P: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.str.html">str</a>>>(
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&self,
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patterns: &<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.slice.html">[P]</a>
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) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.NFA.html" title="struct regex_automata::nfa::thompson::NFA">NFA</a>, <a class="struct" href="struct.BuildError.html" title="struct regex_automata::nfa::thompson::BuildError">BuildError</a>></h4></section></summary><div class="docblock"><p>Compile the given regular expression patterns into a single NFA.</p>
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<p>When matches are returned, the pattern ID corresponds to the index of
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the pattern in the slice given.</p>
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<h5 id="example-1"><a href="#example-1">Example</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::{nfa::thompson::{NFA, pikevm::PikeVM}, Match};
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<span class="kw">let </span>config = NFA::config().nfa_size_limit(<span class="prelude-val">Some</span>(<span class="number">1_000</span>));
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<span class="kw">let </span>nfa = NFA::compiler().configure(config).build_many(<span class="kw-2">&</span>[
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<span class="string">r"(?-u)\s"</span>,
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<span class="string">r"(?-u)\w"</span>,
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])<span class="question-mark">?</span>;
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<span class="kw">let </span>re = PikeVM::new_from_nfa(nfa)<span class="question-mark">?</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>cache = re.create_cache();
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<span class="kw">let </span><span class="kw-2">mut </span>caps = re.create_captures();
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<span class="kw">let </span>expected = <span class="prelude-val">Some</span>(Match::must(<span class="number">1</span>, <span class="number">1</span>..<span class="number">2</span>));
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re.captures(<span class="kw-2">&mut </span>cache, <span class="string">"!A! !A!"</span>, <span class="kw-2">&mut </span>caps);
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<span class="macro">assert_eq!</span>(expected, caps.get_match());
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</code></pre></div>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.build_from_hir" class="method"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#836-838">source</a><h4 class="code-header">pub fn <a href="#method.build_from_hir" class="fn">build_from_hir</a>(&self, expr: &<a class="struct" href="../../../regex_syntax/hir/struct.Hir.html" title="struct regex_syntax::hir::Hir">Hir</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.NFA.html" title="struct regex_automata::nfa::thompson::NFA">NFA</a>, <a class="struct" href="struct.BuildError.html" title="struct regex_automata::nfa::thompson::BuildError">BuildError</a>></h4></section></summary><div class="docblock"><p>Compile the given high level intermediate representation of a regular
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||
expression into an NFA.</p>
|
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<p>If there was a problem building the NFA, then an error is returned. The
|
||
only error that can occur is if the compiled regex would exceed the
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size limits configured on this builder, or if any part of the NFA would
|
||
exceed the integer representations used. (For example, too many states
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might plausibly occur on a 16-bit target.)</p>
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<h5 id="example-2"><a href="#example-2">Example</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::{nfa::thompson::{NFA, pikevm::PikeVM}, Match};
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<span class="kw">use </span>regex_syntax::hir::{Hir, Class, ClassBytes, ClassBytesRange};
|
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<span class="kw">let </span>hir = Hir::class(Class::Bytes(ClassBytes::new(<span class="macro">vec!</span>[
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ClassBytesRange::new(<span class="string">b'0'</span>, <span class="string">b'9'</span>),
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ClassBytesRange::new(<span class="string">b'A'</span>, <span class="string">b'Z'</span>),
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ClassBytesRange::new(<span class="string">b'_'</span>, <span class="string">b'_'</span>),
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ClassBytesRange::new(<span class="string">b'a'</span>, <span class="string">b'z'</span>),
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])));
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<span class="kw">let </span>config = NFA::config().nfa_size_limit(<span class="prelude-val">Some</span>(<span class="number">1_000</span>));
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<span class="kw">let </span>nfa = NFA::compiler().configure(config).build_from_hir(<span class="kw-2">&</span>hir)<span class="question-mark">?</span>;
|
||
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<span class="kw">let </span>re = PikeVM::new_from_nfa(nfa)<span class="question-mark">?</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>cache = re.create_cache();
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<span class="kw">let </span><span class="kw-2">mut </span>caps = re.create_captures();
|
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<span class="kw">let </span>expected = <span class="prelude-val">Some</span>(Match::must(<span class="number">0</span>, <span class="number">3</span>..<span class="number">4</span>));
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re.captures(<span class="kw-2">&mut </span>cache, <span class="string">"!@#A#@!"</span>, <span class="kw-2">&mut </span>caps);
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<span class="macro">assert_eq!</span>(expected, caps.get_match());
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</code></pre></div>
|
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</div></details><details class="toggle method-toggle" open><summary><section id="method.build_many_from_hir" class="method"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#877-882">source</a><h4 class="code-header">pub fn <a href="#method.build_many_from_hir" class="fn">build_many_from_hir</a><H: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><<a class="struct" href="../../../regex_syntax/hir/struct.Hir.html" title="struct regex_syntax::hir::Hir">Hir</a>>>(
|
||
&self,
|
||
exprs: &<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.slice.html">[H]</a>
|
||
) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="struct.NFA.html" title="struct regex_automata::nfa::thompson::NFA">NFA</a>, <a class="struct" href="struct.BuildError.html" title="struct regex_automata::nfa::thompson::BuildError">BuildError</a>></h4></section></summary><div class="docblock"><p>Compile the given high level intermediate representations of regular
|
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expressions into a single NFA.</p>
|
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<p>When matches are returned, the pattern ID corresponds to the index of
|
||
the pattern in the slice given.</p>
|
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<h5 id="example-3"><a href="#example-3">Example</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::{nfa::thompson::{NFA, pikevm::PikeVM}, Match};
|
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<span class="kw">use </span>regex_syntax::hir::{Hir, Class, ClassBytes, ClassBytesRange};
|
||
|
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<span class="kw">let </span>hirs = <span class="kw-2">&</span>[
|
||
Hir::class(Class::Bytes(ClassBytes::new(<span class="macro">vec!</span>[
|
||
ClassBytesRange::new(<span class="string">b'\t'</span>, <span class="string">b'\r'</span>),
|
||
ClassBytesRange::new(<span class="string">b' '</span>, <span class="string">b' '</span>),
|
||
]))),
|
||
Hir::class(Class::Bytes(ClassBytes::new(<span class="macro">vec!</span>[
|
||
ClassBytesRange::new(<span class="string">b'0'</span>, <span class="string">b'9'</span>),
|
||
ClassBytesRange::new(<span class="string">b'A'</span>, <span class="string">b'Z'</span>),
|
||
ClassBytesRange::new(<span class="string">b'_'</span>, <span class="string">b'_'</span>),
|
||
ClassBytesRange::new(<span class="string">b'a'</span>, <span class="string">b'z'</span>),
|
||
]))),
|
||
];
|
||
|
||
<span class="kw">let </span>config = NFA::config().nfa_size_limit(<span class="prelude-val">Some</span>(<span class="number">1_000</span>));
|
||
<span class="kw">let </span>nfa = NFA::compiler().configure(config).build_many_from_hir(hirs)<span class="question-mark">?</span>;
|
||
|
||
<span class="kw">let </span>re = PikeVM::new_from_nfa(nfa)<span class="question-mark">?</span>;
|
||
<span class="kw">let </span><span class="kw-2">mut </span>cache = re.create_cache();
|
||
<span class="kw">let </span><span class="kw-2">mut </span>caps = re.create_captures();
|
||
<span class="kw">let </span>expected = <span class="prelude-val">Some</span>(Match::must(<span class="number">1</span>, <span class="number">1</span>..<span class="number">2</span>));
|
||
re.captures(<span class="kw-2">&mut </span>cache, <span class="string">"!A! !A!"</span>, <span class="kw-2">&mut </span>caps);
|
||
<span class="macro">assert_eq!</span>(expected, caps.get_match());
|
||
</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.configure" class="method"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#897-900">source</a><h4 class="code-header">pub fn <a href="#method.configure" class="fn">configure</a>(&mut self, config: <a class="struct" href="struct.Config.html" title="struct regex_automata::nfa::thompson::Config">Config</a>) -> &mut <a class="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</a></h4></section></summary><div class="docblock"><p>Apply the given NFA configuration options to this builder.</p>
|
||
<h5 id="example-4"><a href="#example-4">Example</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::nfa::thompson::NFA;
|
||
|
||
<span class="kw">let </span>config = NFA::config().nfa_size_limit(<span class="prelude-val">Some</span>(<span class="number">1_000</span>));
|
||
<span class="kw">let </span>nfa = NFA::compiler().configure(config).build(<span class="string">r"(?-u)\w"</span>)<span class="question-mark">?</span>;
|
||
<span class="macro">assert_eq!</span>(nfa.pattern_len(), <span class="number">1</span>);
|
||
</code></pre></div>
|
||
</div></details><details class="toggle method-toggle" open><summary><section id="method.syntax" class="method"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#924-930">source</a><h4 class="code-header">pub fn <a href="#method.syntax" class="fn">syntax</a>(&mut self, config: <a class="struct" href="../../util/syntax/struct.Config.html" title="struct regex_automata::util::syntax::Config">Config</a>) -> &mut <a class="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</a></h4></section></summary><div class="docblock"><p>Set the syntax configuration for this builder using
|
||
<a href="../../util/syntax/struct.Config.html" title="struct regex_automata::util::syntax::Config"><code>syntax::Config</code></a>.</p>
|
||
<p>This permits setting things like case insensitivity, Unicode and multi
|
||
line mode.</p>
|
||
<p>This syntax configuration only applies when an NFA is built directly
|
||
from a pattern string. If an NFA is built from an HIR, then all syntax
|
||
settings are ignored.</p>
|
||
<h5 id="example-5"><a href="#example-5">Example</a></h5>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex_automata::{nfa::thompson::NFA, util::syntax};
|
||
|
||
<span class="kw">let </span>syntax_config = syntax::Config::new().unicode(<span class="bool-val">false</span>);
|
||
<span class="kw">let </span>nfa = NFA::compiler().syntax(syntax_config).build(<span class="string">r"\w"</span>)<span class="question-mark">?</span>;
|
||
<span class="comment">// If Unicode were enabled, the number of states would be much bigger.
|
||
</span><span class="macro">assert!</span>(nfa.states().len() < <span class="number">15</span>);
|
||
</code></pre></div>
|
||
</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-Compiler" class="impl"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#695">source</a><a href="#impl-Clone-for-Compiler" 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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</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/nfa/thompson/compiler.rs.html#695">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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</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-Compiler" class="impl"><a class="src rightside" href="../../../src/regex_automata/nfa/thompson/compiler.rs.html#695">source</a><a href="#impl-Debug-for-Compiler" 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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</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/nfa/thompson/compiler.rs.html#695">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></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-Compiler" class="impl"><a href="#impl-RefUnwindSafe-for-Compiler" 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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</a></h3></section><section id="impl-Send-for-Compiler" class="impl"><a href="#impl-Send-for-Compiler" 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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</a></h3></section><section id="impl-Sync-for-Compiler" class="impl"><a href="#impl-Sync-for-Compiler" 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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</a></h3></section><section id="impl-Unpin-for-Compiler" class="impl"><a href="#impl-Unpin-for-Compiler" 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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</a></h3></section><section id="impl-UnwindSafe-for-Compiler" class="impl"><a href="#impl-UnwindSafe-for-Compiler" 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="struct" href="struct.Compiler.html" title="struct regex_automata::nfa::thompson::Compiler">Compiler</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
|
||
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
|
||
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
|
||
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>
|
||
</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
|
||
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>
|
||
<p>That is, this conversion is whatever the implementation of
|
||
<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>
|
||
</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
|
||
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> |