edg-l/edlang
1
1
Fork 0
mirror of https://github.com/edg-l/edlang.git synced 2024-11-23 00:18:24 +00:00
Code Issues Packages Projects Releases Wiki Activity
edlang/regex/struct.RegexSet.html

273 lines
49 KiB
HTML
Raw Permalink Normal View History

deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
<!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="Match multiple, possibly overlapping, regexes in a single search."><title>RegexSet in regex - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-dd39b87e5fcfba68.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="regex" data-themes="" data-resource-suffix="" data-rustdoc-version="1.80.0 (051478957 2024-07-21)" data-channel="1.80.0" data-search-js="search-d52510db62a78183.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-118b08c4c78b968e.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-20a3ad099b048cf2.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-df360f571f6edeae.css"></noscript><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="../regex/index.html">regex</a><span class="version">1.10.5</span></h2></div><h2 class="location"><a href="#">RegexSet</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.empty">empty</a></li><li><a href="#method.is_empty">is_empty</a></li><li><a href="#method.is_match">is_match</a></li><li><a href="#method.is_match_at">is_match_at</a></li><li><a href="#method.len">len</a></li><li><a href="#method.matches">matches</a></li><li><a href="#method.matches_at">matches_at</a></li><li><a href="#method.new">new</a></li><li><a href="#method.patterns">patterns</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-RegexSet">Clone</a></li><li><a href="#impl-Debug-for-RegexSet">Debug</a></li><li><a href="#impl-Default-for-RegexSet">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-RegexSet">Freeze</a></li><li><a href="#impl-RefUnwindSafe-for-RegexSet">RefUnwindSafe</a></li><li><a href="#impl-Send-for-RegexSet">Send</a></li><li><a href="#impl-Sync-for-RegexSet">Sync</a></li><li><a href="#impl-Unpin-for-RegexSet">Unpin</a></li><li><a href="#impl-UnwindSafe-for-RegexSet">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 regex</a></h2></div></nav><div c
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>A regex set corresponds to the union of zero or more regular expressions.
That is, a regex set will match a haystack when at least one of its
constituent regexes matches. A regex set as its formulated here provides a
touch more power: it will also report <em>which</em> regular expressions in the
set match. Indeed, this is the key difference between regex sets and a
single <code>Regex</code> with many alternates, since only one alternate can match at
a time.</p>
<p>For example, consider regular expressions to match email addresses and
domains: <code>[a-z]+@[a-z]+\.(com|org|net)</code> and <code>[a-z]+\.(com|org|net)</code>. If a
regex set is constructed from those regexes, then searching the haystack
<code>foo@example.com</code> will report both regexes as matching. Of course, one
could accomplish this by compiling each regex on its own and doing two
searches over the haystack. The key advantage of using a regex set is
that it will report the matching regexes using a <em>single pass through the
haystack</em>. If one has hundreds or thousands of regexes to match repeatedly
(like a URL router for a complex web application or a user agent matcher),
then a regex set <em>can</em> realize huge performance gains.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h2 id="limitations"><a class="doc-anchor" href="#limitations">§</a>Limitations</h2>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>Regex sets are limited to answering the following two questions:</p>
<ol>
<li>Does any regex in the set match?</li>
<li>If so, which regexes in the set match?</li>
</ol>
<p>As with the main <a href="struct.Regex.html" title="struct regex::Regex"><code>Regex</code></a> type, it is cheaper to ask (1)
instead of (2) since the matching engines can stop after the first match
is found.</p>
<p>You cannot directly extract <a href="struct.Match.html" title="struct regex::Match"><code>Match</code></a> or
<a href="struct.Captures.html" title="struct regex::Captures"><code>Captures</code></a> objects from a regex set. If you need these
operations, the recommended approach is to compile each pattern in the set
independently and scan the exact same haystack a second time with those
independently compiled patterns:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::{Regex, RegexSet};
<span class="kw">let </span>patterns = [<span class="string">"foo"</span>, <span class="string">"bar"</span>];
<span class="comment">// Both patterns will match different ranges of this string.
</span><span class="kw">let </span>hay = <span class="string">"barfoo"</span>;
<span class="comment">// Compile a set matching any of our patterns.
</span><span class="kw">let </span>set = RegexSet::new(patterns).unwrap();
<span class="comment">// Compile each pattern independently.
</span><span class="kw">let </span>regexes: Vec&lt;<span class="kw">_</span>&gt; = set
.patterns()
.iter()
.map(|pat| Regex::new(pat).unwrap())
.collect();
<span class="comment">// Match against the whole set first and identify the individual
// matching patterns.
</span><span class="kw">let </span>matches: Vec&lt;<span class="kw-2">&amp;</span>str&gt; = set
.matches(hay)
.into_iter()
<span class="comment">// Dereference the match index to get the corresponding
// compiled pattern.
</span>.map(|index| <span class="kw-2">&amp;</span>regexes[index])
<span class="comment">// To get match locations or any other info, we then have to search the
// exact same haystack again, using our separately-compiled pattern.
</span>.map(|re| re.find(hay).unwrap().as_str())
.collect();
<span class="comment">// Matches arrive in the order the constituent patterns were declared,
// not the order they appear in the haystack.
</span><span class="macro">assert_eq!</span>(<span class="macro">vec!</span>[<span class="string">"foo"</span>, <span class="string">"bar"</span>], matches);</code></pre></div>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h2 id="performance"><a class="doc-anchor" href="#performance">§</a>Performance</h2>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>A <code>RegexSet</code> has the same performance characteristics as <code>Regex</code>. Namely,
search takes <code>O(m * n)</code> time, where <code>m</code> is proportional to the size of the
regex set and <code>n</code> is proportional to the length of the haystack.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h2 id="trait-implementations-1"><a class="doc-anchor" href="#trait-implementations-1">§</a>Trait implementations</h2>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>The <code>Default</code> trait is implemented for <code>RegexSet</code>. The default value
is an empty set. An empty set can also be explicitly constructed via
<a href="struct.RegexSet.html#method.empty" title="associated function regex::RegexSet::empty"><code>RegexSet::empty</code></a>.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>This shows how the above two regexes (for matching email addresses and
domains) might work:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::new(<span class="kw-2">&amp;</span>[
<span class="string">r"[a-z]+@[a-z]+\.(com|org|net)"</span>,
<span class="string">r"[a-z]+\.(com|org|net)"</span>,
]).unwrap();
<span class="comment">// Ask whether any regexes in the set match.
</span><span class="macro">assert!</span>(set.is_match(<span class="string">"foo@example.com"</span>));
<span class="comment">// Identify which regexes in the set match.
</span><span class="kw">let </span>matches: Vec&lt;<span class="kw">_</span>&gt; = set.matches(<span class="string">"foo@example.com"</span>).into_iter().collect();
<span class="macro">assert_eq!</span>(<span class="macro">vec!</span>[<span class="number">0</span>, <span class="number">1</span>], matches);
<span class="comment">// Try again, but with a haystack that only matches one of the regexes.
</span><span class="kw">let </span>matches: Vec&lt;<span class="kw">_</span>&gt; = set.matches(<span class="string">"example.com"</span>).into_iter().collect();
<span class="macro">assert_eq!</span>(<span class="macro">vec!</span>[<span class="number">1</span>], matches);
<span class="comment">// Try again, but with a haystack that doesn't match any regex in the set.
</span><span class="kw">let </span>matches: Vec&lt;<span class="kw">_</span>&gt; = set.matches(<span class="string">"example"</span>).into_iter().collect();
<span class="macro">assert!</span>(matches.is_empty());</code></pre></div>
<p>Note that it would be possible to adapt the above example to using <code>Regex</code>
with an expression like:</p>
<div class="example-wrap"><pre class="language-text"><code>(?P&lt;email&gt;[a-z]+@(?P&lt;email_domain&gt;[a-z]+[.](com|org|net)))|(?P&lt;domain&gt;[a-z]+[.](com|org|net))
</code></pre></div>
<p>After a match, one could then inspect the capture groups to figure out
which alternates matched. The problem is that it is hard to make this
approach scale when there are many regexes since the overlap between each
alternate isn’t always obvious to reason about.</p>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</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-RegexSet" class="impl"><a class="src rightside" href="../src/regex/regexset/string.rs.html#137-447">source</a><a href="#impl-RegexSet" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.RegexSet.html" title="struct regex::RegexSet">RegexSet</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/regexset/string.rs.html#154-160">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>&lt;I, S&gt;(exprs: I) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.80.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="struct" href="struct.RegexSet.html" title="struct regex::RegexSet">RegexSet</a>, <a class="enum" href="enum.Error.html" title="enum regex::Error">Error</a>&gt;<div class="where">where
S: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>&gt;,
I: <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>&lt;Item = S&gt;,</div></h4></section></summary><div class="docblock"><p>Create a new regex set with the given regular expressions.</p>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>This takes an iterator of <code>S</code>, where <code>S</code> is something that can produce
a <code>&amp;str</code>. If any of the strings in the iterator are not valid regular
expressions, then an error is returned.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-1"><a class="doc-anchor" href="#example-1">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>Create a new regex set from an iterator of strings:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::new([<span class="string">r"\w+"</span>, <span class="string">r"\d+"</span>]).unwrap();
<span class="macro">assert!</span>(set.is_match(<span class="string">"foo"</span>));</code></pre></div>
</div></details><details class="toggle method-toggle" open><summary><section id="method.empty" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#179-182">source</a><h4 class="code-header">pub fn <a href="#method.empty" class="fn">empty</a>() -&gt; <a class="struct" href="struct.RegexSet.html" title="struct regex::RegexSet">RegexSet</a></h4></section></summary><div class="docblock"><p>Create a new empty regex set.</p>
<p>An empty regex never matches anything.</p>
<p>This is a convenience function for <code>RegexSet::new([])</code>, but doesn’t
require one to specify the type of the input.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-2"><a class="doc-anchor" href="#example-2">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::empty();
<span class="macro">assert!</span>(set.is_empty());
<span class="comment">// an empty set matches nothing
</span><span class="macro">assert!</span>(!set.is_match(<span class="string">""</span>));</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_match" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#210-212">source</a><h4 class="code-header">pub fn <a href="#method.is_match" class="fn">is_match</a>(&amp;self, haystack: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if and only if one of the regexes in this set matches
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
the haystack given.</p>
<p>This method should be preferred if you only need to test whether any
of the regexes in the set should match, but don’t care about <em>which</em>
regexes matched. This is because the underlying matching engine will
quit immediately after seeing the first match instead of continuing to
find all matches.</p>
<p>Note that as with searches using <a href="struct.Regex.html" title="struct regex::Regex"><code>Regex</code></a>, the
expression is unanchored by default. That is, if the regex does not
start with <code>^</code> or <code>\A</code>, or end with <code>$</code> or <code>\z</code>, then it is permitted
to match anywhere in the haystack.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-3"><a class="doc-anchor" href="#example-3">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>Tests whether a set matches somewhere in a haystack:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::new([<span class="string">r"\w+"</span>, <span class="string">r"\d+"</span>]).unwrap();
<span class="macro">assert!</span>(set.is_match(<span class="string">"foo"</span>));
<span class="macro">assert!</span>(!set.is_match(<span class="string">"☃"</span>));</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_match_at" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#244-246">source</a><h4 class="code-header">pub fn <a href="#method.is_match_at" class="fn">is_match_at</a>(&amp;self, haystack: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>, start: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.usize.html">usize</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if and only if one of the regexes in this set matches the
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
haystack given, with the search starting at the offset given.</p>
<p>The significance of the starting point is that it takes the surrounding
context into consideration. For example, the <code>\A</code> anchor can only
match when <code>start == 0</code>.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="panics"><a class="doc-anchor" href="#panics">§</a>Panics</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>This panics when <code>start &gt;= haystack.len() + 1</code>.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-4"><a class="doc-anchor" href="#example-4">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>This example shows the significance of <code>start</code>. Namely, consider a
haystack <code>foobar</code> and a desire to execute a search starting at offset
<code>3</code>. You could search a substring explicitly, but then the look-around
assertions won’t work correctly. Instead, you can use this method to
specify the start position of a search.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::new([<span class="string">r"\bbar\b"</span>, <span class="string">r"(?m)^bar$"</span>]).unwrap();
<span class="kw">let </span>hay = <span class="string">"foobar"</span>;
<span class="comment">// We get a match here, but it's probably not intended.
</span><span class="macro">assert!</span>(set.is_match(<span class="kw-2">&amp;</span>hay[<span class="number">3</span>..]));
<span class="comment">// No match because the assertions take the context into account.
</span><span class="macro">assert!</span>(!set.is_match_at(hay, <span class="number">3</span>));</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</div></details><details class="toggle method-toggle" open><summary><section id="method.matches" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#287-289">source</a><h4 class="code-header">pub fn <a href="#method.matches" class="fn">matches</a>(&amp;self, haystack: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>) -&gt; <a class="struct" href="struct.SetMatches.html" title="struct regex::SetMatches">SetMatches</a></h4></section></summary><div class="docblock"><p>Returns the set of regexes that match in the given haystack.</p>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>The set returned contains the index of each regex that matches in
the given haystack. The index is in correspondence with the order of
regular expressions given to <code>RegexSet</code>’s constructor.</p>
<p>The set can also be used to iterate over the matched indices. The order
of iteration is always ascending with respect to the matching indices.</p>
<p>Note that as with searches using <a href="struct.Regex.html" title="struct regex::Regex"><code>Regex</code></a>, the
expression is unanchored by default. That is, if the regex does not
start with <code>^</code> or <code>\A</code>, or end with <code>$</code> or <code>\z</code>, then it is permitted
to match anywhere in the haystack.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-5"><a class="doc-anchor" href="#example-5">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>Tests which regular expressions match the given haystack:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::new([
<span class="string">r"\w+"</span>,
<span class="string">r"\d+"</span>,
<span class="string">r"\pL+"</span>,
<span class="string">r"foo"</span>,
<span class="string">r"bar"</span>,
<span class="string">r"barfoo"</span>,
<span class="string">r"foobar"</span>,
]).unwrap();
<span class="kw">let </span>matches: Vec&lt;<span class="kw">_</span>&gt; = set.matches(<span class="string">"foobar"</span>).into_iter().collect();
<span class="macro">assert_eq!</span>(matches, <span class="macro">vec!</span>[<span class="number">0</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">6</span>]);
<span class="comment">// You can also test whether a particular regex matched:
</span><span class="kw">let </span>matches = set.matches(<span class="string">"foobar"</span>);
<span class="macro">assert!</span>(!matches.matched(<span class="number">5</span>));
<span class="macro">assert!</span>(matches.matched(<span class="number">6</span>));</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</div></details><details class="toggle method-toggle" open><summary><section id="method.matches_at" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#325-330">source</a><h4 class="code-header">pub fn <a href="#method.matches_at" class="fn">matches_at</a>(&amp;self, haystack: &amp;<a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.str.html">str</a>, start: <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.usize.html">usize</a>) -&gt; <a class="struct" href="struct.SetMatches.html" title="struct regex::SetMatches">SetMatches</a></h4></section></summary><div class="docblock"><p>Returns the set of regexes that match in the given haystack.</p>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>The set returned contains the index of each regex that matches in
the given haystack. The index is in correspondence with the order of
regular expressions given to <code>RegexSet</code>’s constructor.</p>
<p>The set can also be used to iterate over the matched indices. The order
of iteration is always ascending with respect to the matching indices.</p>
<p>The significance of the starting point is that it takes the surrounding
context into consideration. For example, the <code>\A</code> anchor can only
match when <code>start == 0</code>.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="panics-1"><a class="doc-anchor" href="#panics-1">§</a>Panics</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>This panics when <code>start &gt;= haystack.len() + 1</code>.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-6"><a class="doc-anchor" href="#example-6">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>Tests which regular expressions match the given haystack:</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::new([<span class="string">r"\bbar\b"</span>, <span class="string">r"(?m)^bar$"</span>]).unwrap();
<span class="kw">let </span>hay = <span class="string">"foobar"</span>;
<span class="comment">// We get matches here, but it's probably not intended.
</span><span class="kw">let </span>matches: Vec&lt;<span class="kw">_</span>&gt; = set.matches(<span class="kw-2">&amp;</span>hay[<span class="number">3</span>..]).into_iter().collect();
<span class="macro">assert_eq!</span>(matches, <span class="macro">vec!</span>[<span class="number">0</span>, <span class="number">1</span>]);
<span class="comment">// No matches because the assertions take the context into account.
</span><span class="kw">let </span>matches: Vec&lt;<span class="kw">_</span>&gt; = set.matches_at(hay, <span class="number">3</span>).into_iter().collect();
<span class="macro">assert_eq!</span>(matches, <span class="macro">vec!</span>[]);</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</div></details><details class="toggle method-toggle" open><summary><section id="method.len" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#396-398">source</a><h4 class="code-header">pub fn <a href="#method.len" class="fn">len</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the total number of regexes in this set.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-7"><a class="doc-anchor" href="#example-7">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="macro">assert_eq!</span>(<span class="number">0</span>, RegexSet::empty().len());
<span class="macro">assert_eq!</span>(<span class="number">1</span>, RegexSet::new([<span class="string">r"[0-9]"</span>]).unwrap().len());
<span class="macro">assert_eq!</span>(<span class="number">2</span>, RegexSet::new([<span class="string">r"[0-9]"</span>, <span class="string">r"[a-z]"</span>]).unwrap().len());</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</div></details><details class="toggle method-toggle" open><summary><section id="method.is_empty" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#411-413">source</a><h4 class="code-header">pub fn <a href="#method.is_empty" class="fn">is_empty</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if this set contains no regexes.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-8"><a class="doc-anchor" href="#example-8">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="macro">assert!</span>(RegexSet::empty().is_empty());
<span class="macro">assert!</span>(!RegexSet::new([<span class="string">r"[0-9]"</span>]).unwrap().is_empty());</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</div></details><details class="toggle method-toggle" open><summary><section id="method.patterns" class="method"><a class="src rightside" href="../src/regex/regexset/string.rs.html#444-446">source</a><h4 class="code-header">pub fn <a href="#method.patterns" class="fn">patterns</a>(&amp;self) -&gt; &amp;[<a class="struct" href="https://doc.rust-lang.org/1.80.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>]</h4></section></summary><div class="docblock"><p>Returns the regex patterns that this regex set was constructed from.</p>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>This function can be used to determine the pattern for a match. The
slice returned has exactly as many patterns givens to this regex set,
and the order of the slice is the same as the order of the patterns
provided to the set.</p>
deploy: 39fc7f2b9fd58ce67982b1c71c788f3b031ae3df
2024-03-27 11:12:16 +00:00
<h5 id="example-9"><a class="doc-anchor" href="#example-9">§</a>Example</h5>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>regex::RegexSet;
<span class="kw">let </span>set = RegexSet::new(<span class="kw-2">&amp;</span>[
<span class="string">r"\w+"</span>,
<span class="string">r"\d+"</span>,
<span class="string">r"\pL+"</span>,
<span class="string">r"foo"</span>,
<span class="string">r"bar"</span>,
<span class="string">r"barfoo"</span>,
<span class="string">r"foobar"</span>,
]).unwrap();
<span class="kw">let </span>matches: Vec&lt;<span class="kw">_</span>&gt; = set
.matches(<span class="string">"foobar"</span>)
.into_iter()
.map(|index| <span class="kw-2">&amp;</span>set.patterns()[index])
.collect();
<span class="macro">assert_eq!</span>(matches, <span class="macro">vec!</span>[<span class="string">r"\w+"</span>, <span class="string">r"\pL+"</span>, <span class="string">r"foo"</span>, <span class="string">r"bar"</span>, <span class="string">r"foobar"</span>]);</code></pre></div>
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
</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-RegexSet" class="impl"><a class="src rightside" href="../src/regex/regexset/string.rs.html#131">source</a><a href="#impl-Clone-for-RegexSet" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.RegexSet.html" title="struct regex::RegexSet">RegexSet</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/regexset/string.rs.html#131">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.80.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&amp;self) -&gt; <a class="struct" href="struct.RegexSet.html" title="struct regex::RegexSet">RegexSet</a></h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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-RegexSet" class="impl"><a class="src rightside" href="../src/regex/regexset/string.rs.html#702-706">source</a><a href="#impl-Debug-for-RegexSet" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.RegexSet.html" title="struct regex::RegexSet">RegexSet</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/regexset/string.rs.html#703-705">source</a><a href="#method.fmt" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.80.0/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/1.80.0/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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-RegexSet" class="impl"><a class="src rightside" href="../src/regex/regexset/string.rs.html#449-453">source</a><a href="#impl-Default-for-RegexSet" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.80.0/core/default/trait.Default.html" title="trait
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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>
deploy: 4a83cfd6f9c58b14a87234162281aad1aef83c3e
2024-02-13 06:38:44 +00:00
<p>That is, this conversion is whatever the implementation of
deploy: b3bd34a9bbae9c73eb2d66a212d6921bd7499b69
2024-07-26 09:42:18 +00:00
<code><a href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.80.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/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-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/1.80.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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/1.80.0/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/1.80.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/1.80.0/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/1.80.0/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/1.80.0/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>
Reference in a new issue Copy permalink