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 </pre><pre class="rust ">
 <span class="comment">// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT</span>
 <span class="comment">// file at the top-level directory of this distribution and at</span>
 <span class="comment">// http://rust-lang.org/COPYRIGHT.</span>
 <span class="comment">//</span>
 <span class="comment">// Licensed under the Apache License, Version 2.0 &lt;LICENSE-APACHE or</span>
 <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0&gt; or the MIT license</span>
 <span class="comment">// &lt;LICENSE-MIT or http://opensource.org/licenses/MIT&gt;, at your</span>
 <span class="comment">// option. This file may not be copied, modified, or distributed</span>
 <span class="comment">// except according to those terms.</span>

 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">borrow</span>::<span class="ident">Cow</span>;
 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ops</span>::<span class="ident">Index</span>;
 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">str</span>::<span class="ident">FromStr</span>;
 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">Arc</span>;

 <span class="kw">use</span> <span class="ident">syntax</span>;

 <span class="kw">use</span> <span class="ident">error</span>::<span class="ident">Error</span>;
 <span class="kw">use</span> <span class="ident">exec</span>::{<span class="ident">Exec</span>, <span class="ident">ExecNoSyncStr</span>};
 <span class="kw">use</span> <span class="ident">re_builder</span>::<span class="ident">unicode</span>::<span class="ident">RegexBuilder</span>;
 <span class="kw">use</span> <span class="ident">re_plugin</span>::<span class="ident">Plugin</span>;
 <span class="kw">use</span> <span class="ident">re_trait</span>::{<span class="self">self</span>, <span class="ident">RegularExpression</span>, <span class="ident">Slot</span>};

 <span class="doccomment">/// Escapes all regular expression meta characters in `text`.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The string returned may be safely used as a literal in a regular</span>
 <span class="doccomment">/// expression.</span>
 <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">quote</span>(<span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="ident">String</span> {
     <span class="ident">syntax</span>::<span class="ident">quote</span>(<span class="ident">text</span>)
 }

 <span class="doccomment">/// Tests if the given regular expression matches somewhere in the text given.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// If there was a problem compiling the regular expression, an error is</span>
 <span class="doccomment">/// returned.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// To find submatches, split or replace text, you&#39;ll need to compile an</span>
 <span class="doccomment">/// expression first.</span>
 <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_match</span>(<span class="ident">regex</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">bool</span>, <span class="ident">Error</span><span class="op">&gt;</span> {
     <span class="ident">Regex</span>::<span class="ident">new</span>(<span class="ident">regex</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span>.<span class="ident">is_match</span>(<span class="ident">text</span>))
 }

 <span class="doccomment">/// A compiled regular expression for matching Unicode strings.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// It is represented as either a sequence of bytecode instructions (dynamic)</span>
 <span class="doccomment">/// or as a specialized Rust function (native). It can be used to search, split</span>
 <span class="doccomment">/// or replace text. All searching is done with an implicit `.*?` at the</span>
 <span class="doccomment">/// beginning and end of an expression. To force an expression to match the</span>
 <span class="doccomment">/// whole string (or a prefix or a suffix), you must use an anchor like `^` or</span>
 <span class="doccomment">/// `$` (or `\A` and `\z`).</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// While this crate will handle Unicode strings (whether in the regular</span>
 <span class="doccomment">/// expression or in the search text), all positions returned are **byte</span>
 <span class="doccomment">/// indices**. Every byte index is guaranteed to be at a Unicode code point</span>
 <span class="doccomment">/// boundary.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The lifetimes `&#39;r` and `&#39;t` in this crate correspond to the lifetime of a</span>
 <span class="doccomment">/// compiled regular expression and text to search, respectively.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The only methods that allocate new strings are the string replacement</span>
 <span class="doccomment">/// methods. All other methods (searching and splitting) return borrowed</span>
 <span class="doccomment">/// pointers into the string given.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// # Examples</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// Find the location of a US phone number:</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// ```rust</span>
 <span class="doccomment">/// # use regex::Regex;</span>
 <span class="doccomment">/// let re = Regex::new(&quot;[0-9]{3}-[0-9]{3}-[0-9]{4}&quot;).unwrap();</span>
 <span class="doccomment">/// assert_eq!(re.find(&quot;phone: 111-222-3333&quot;), Some((7, 19)));</span>
 <span class="doccomment">/// ```</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// # Using the `std::str::StrExt` methods with `Regex`</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// &gt; **Note**: This section requires that this crate is currently compiled with</span>
 <span class="doccomment">/// &gt;           the `pattern` Cargo feature enabled.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// Since `Regex` implements `Pattern`, you can use regexes with methods</span>
 <span class="doccomment">/// defined on `std::str::StrExt`. For example, `is_match`, `find`, `find_iter`</span>
 <span class="doccomment">/// and `split` can be replaced with `StrExt::contains`, `StrExt::find`,</span>
 <span class="doccomment">/// `StrExt::match_indices` and `StrExt::split`.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// Here are some examples:</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// ```rust,ignore</span>
 <span class="doccomment">/// # use regex::Regex;</span>
 <span class="doccomment">/// let re = Regex::new(r&quot;\d+&quot;).unwrap();</span>
 <span class="doccomment">/// let haystack = &quot;a111b222c&quot;;</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// assert!(haystack.contains(&amp;re));</span>
 <span class="doccomment">/// assert_eq!(haystack.find(&amp;re), Some(1));</span>
 <span class="doccomment">/// assert_eq!(haystack.match_indices(&amp;re).collect::&lt;Vec&lt;_&gt;&gt;(),</span>
 <span class="doccomment">///            vec![(1, 4), (5, 8)]);</span>
 <span class="doccomment">/// assert_eq!(haystack.split(&amp;re).collect::&lt;Vec&lt;_&gt;&gt;(), vec![&quot;a&quot;, &quot;b&quot;, &quot;c&quot;]);</span>
 <span class="doccomment">/// ```</span>
 <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Regex</span>(<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> <span class="kw">pub</span> <span class="ident">_Regex</span>);

 <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span>
 <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
 <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">_Regex</span> {
     <span class="comment">// The representation of `Regex` is exported to support the `regex!`</span>
     <span class="comment">// syntax extension. Do not rely on it.</span>
     <span class="comment">//</span>
     <span class="comment">// See the comments for the `program` module in `lib.rs` for a more</span>
     <span class="comment">// detailed explanation for what `regex!` requires.</span>
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="ident">Dynamic</span>(<span class="ident">Exec</span>),
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="ident">Plugin</span>(<span class="ident">Plugin</span>),
 }

 <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Regex</span> {
     <span class="doccomment">/// Shows the original regular expression.</span>
     <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
         <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;{}&quot;</span>, <span class="self">self</span>.<span class="ident">as_str</span>())
     }
 }

 <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Regex</span> {
     <span class="doccomment">/// Shows the original regular expression.</span>
     <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
         <span class="ident">fmt</span>::<span class="ident">Display</span>::<span class="ident">fmt</span>(<span class="self">self</span>, <span class="ident">f</span>)
     }
 }

 <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
 <span class="kw">impl</span> <span class="ident">From</span><span class="op">&lt;</span><span class="ident">Exec</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Regex</span> {
     <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">exec</span>: <span class="ident">Exec</span>) <span class="op">-&gt;</span> <span class="ident">Regex</span> {
         <span class="ident">Regex</span>(<span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="ident">exec</span>))
     }
 }

 <span class="doccomment">/// Equality comparison is based on the original string. It is possible that</span>
 <span class="doccomment">/// different regular expressions have the same matching behavior, but are</span>
 <span class="doccomment">/// still compared unequal. For example, `\d+` and `\d\d*` match the same set</span>
 <span class="doccomment">/// of strings, but are not considered equal.</span>
 <span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">Regex</span> {
     <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&amp;</span><span class="ident">Regex</span>) <span class="op">-&gt;</span> <span class="ident">bool</span> {
         <span class="self">self</span>.<span class="ident">as_str</span>() <span class="op">==</span> <span class="ident">other</span>.<span class="ident">as_str</span>()
     }
 }

 <span class="kw">impl</span> <span class="ident">Eq</span> <span class="kw">for</span> <span class="ident">Regex</span> {}

 <span class="kw">impl</span> <span class="ident">FromStr</span> <span class="kw">for</span> <span class="ident">Regex</span> {
     <span class="kw">type</span> <span class="prelude-val">Err</span> <span class="op">=</span> <span class="ident">Error</span>;

     <span class="doccomment">/// Attempts to parse a string into a regular expression</span>
     <span class="kw">fn</span> <span class="ident">from_str</span>(<span class="ident">s</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">Regex</span>, <span class="ident">Error</span><span class="op">&gt;</span> {
         <span class="ident">Regex</span>::<span class="ident">new</span>(<span class="ident">s</span>)
     }
 }

 <span class="kw">impl</span> <span class="ident">Regex</span> {
     <span class="doccomment">/// Compiles a regular expression. Once compiled, it can be used repeatedly</span>
     <span class="doccomment">/// to search, split or replace text in a string.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// If an invalid expression is given, then an error is returned.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">re</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">Regex</span>, <span class="ident">Error</span><span class="op">&gt;</span> {
         <span class="ident">Regex</span>::<span class="ident">with_size_limit</span>(<span class="number">10</span> <span class="op">*</span> (<span class="number">1</span> <span class="op">&lt;&lt;</span> <span class="number">20</span>), <span class="ident">re</span>)
     }

     <span class="doccomment">/// Compiles a regular expression with the given size limit.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// The size limit is applied to the size of the *compiled* data structure.</span>
     <span class="doccomment">/// If the data structure exceeds the size given, then an error is</span>
     <span class="doccomment">/// returned.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">with_size_limit</span>(<span class="ident">size</span>: <span class="ident">usize</span>, <span class="ident">re</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">Regex</span>, <span class="ident">Error</span><span class="op">&gt;</span> {
         <span class="ident">RegexBuilder</span>::<span class="ident">new</span>(<span class="ident">re</span>).<span class="ident">size_limit</span>(<span class="ident">size</span>).<span class="ident">compile</span>()
     }

     <span class="doccomment">/// Returns true if and only if the regex matches the string given.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// It is recommended to use this method if all you need to do is test</span>
     <span class="doccomment">/// a match, since the underlying matching engine may be able to do less</span>
     <span class="doccomment">/// work.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Example</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Test if some text contains at least one word with exactly 13</span>
     <span class="doccomment">/// Unicode word characters:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let text = &quot;I categorically deny having triskaidekaphobia.&quot;;</span>
     <span class="doccomment">/// assert!(Regex::new(r&quot;\b\w{13}\b&quot;).unwrap().is_match(text));</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_match</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="ident">bool</span> {
         <span class="self">self</span>.<span class="ident">is_match_at</span>(<span class="ident">text</span>, <span class="number">0</span>)
     }

     <span class="doccomment">/// Returns the same as is_match, but starts the search at the given</span>
     <span class="doccomment">/// offset.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// The significance of the starting point is that it takes the surrounding</span>
     <span class="doccomment">/// context into consideration. For example, the `\A` anchor can only</span>
     <span class="doccomment">/// match when `start == 0`.</span>
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_match_at</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">start</span>: <span class="ident">usize</span>) <span class="op">-&gt;</span> <span class="ident">bool</span> {
         <span class="self">self</span>.<span class="ident">shortest_match_at</span>(<span class="ident">text</span>, <span class="ident">start</span>).<span class="ident">is_some</span>()
     }

     <span class="doccomment">/// Returns the start and end byte range of the leftmost-first match in</span>
     <span class="doccomment">/// `text`. If no match exists, then `None` is returned.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Note that this should only be used if you want to discover the position</span>
     <span class="doccomment">/// of the match. Testing the existence of a match is faster if you use</span>
     <span class="doccomment">/// `is_match`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Example</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Find the start and end location of the first word with exactly 13</span>
     <span class="doccomment">/// Unicode word characters:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let text = &quot;I categorically deny having triskaidekaphobia.&quot;;</span>
     <span class="doccomment">/// let pos = Regex::new(r&quot;\b\w{13}\b&quot;).unwrap().find(text);</span>
     <span class="doccomment">/// assert_eq!(pos, Some((2, 15)));</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">find</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">&gt;</span> {
         <span class="self">self</span>.<span class="ident">find_at</span>(<span class="ident">text</span>, <span class="number">0</span>)
     }

     <span class="doccomment">/// Returns the same as find, but starts the search at the given</span>
     <span class="doccomment">/// offset.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// The significance of the starting point is that it takes the surrounding</span>
     <span class="doccomment">/// context into consideration. For example, the `\A` anchor can only</span>
     <span class="doccomment">/// match when `start == 0`.</span>
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">find_at</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">start</span>: <span class="ident">usize</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">exec</span>) <span class="op">=&gt;</span> {
                 <span class="ident">exec</span>.<span class="ident">searcher_str</span>().<span class="ident">find_at</span>(<span class="ident">text</span>, <span class="ident">start</span>)
             }
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">plug</span>) <span class="op">=&gt;</span> <span class="ident">plug</span>.<span class="ident">find_at</span>(<span class="ident">text</span>, <span class="ident">start</span>),
         }
     }

     <span class="doccomment">/// Returns an iterator for each successive non-overlapping match in</span>
     <span class="doccomment">/// `text`, returning the start and end byte indices with respect to</span>
     <span class="doccomment">/// `text`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Example</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Find the start and end location of every word with exactly 13 Unicode</span>
     <span class="doccomment">/// word characters:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let text = &quot;Retroactively relinquishing remunerations is reprehensible.&quot;;</span>
     <span class="doccomment">/// for pos in Regex::new(r&quot;\b\w{13}\b&quot;).unwrap().find_iter(text) {</span>
     <span class="doccomment">///     println!(&quot;{:?}&quot;, pos);</span>
     <span class="doccomment">/// }</span>
     <span class="doccomment">/// // Output:</span>
     <span class="doccomment">/// // (0, 13)</span>
     <span class="doccomment">/// // (14, 27)</span>
     <span class="doccomment">/// // (28, 41)</span>
     <span class="doccomment">/// // (45, 58)</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">find_iter</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;r</span> <span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>) <span class="op">-&gt;</span> <span class="ident">FindMatches</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">exec</span>) <span class="op">=&gt;</span> {
                 <span class="kw">let</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">exec</span>.<span class="ident">searcher_str</span>().<span class="ident">find_iter</span>(<span class="ident">text</span>);
                 <span class="ident">FindMatches</span>(<span class="ident">FindMatchesInner</span>::<span class="ident">Dynamic</span>(<span class="ident">it</span>))
             }
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">plug</span>) <span class="op">=&gt;</span> {
                 <span class="kw">let</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">plug</span>.<span class="ident">find_iter</span>(<span class="ident">text</span>);
                 <span class="ident">FindMatches</span>(<span class="ident">FindMatchesInner</span>::<span class="ident">Plugin</span>(<span class="ident">it</span>))
             }
         }
     }

     <span class="doccomment">/// Returns the capture groups corresponding to the leftmost-first</span>
     <span class="doccomment">/// match in `text`. Capture group `0` always corresponds to the entire</span>
     <span class="doccomment">/// match. If no match is found, then `None` is returned.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// You should only use `captures` if you need access to submatches.</span>
     <span class="doccomment">/// Otherwise, `find` is faster for discovering the location of the overall</span>
     <span class="doccomment">/// match.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Examples</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Say you have some text with movie names and their release years,</span>
     <span class="doccomment">/// like &quot;&#39;Citizen Kane&#39; (1941)&quot;. It&#39;d be nice if we could search for text</span>
     <span class="doccomment">/// looking like that, while also extracting the movie name and its release</span>
     <span class="doccomment">/// year separately.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;&#39;([^&#39;]+)&#39;\s+\((\d{4})\)&quot;).unwrap();</span>
     <span class="doccomment">/// let text = &quot;Not my favorite movie: &#39;Citizen Kane&#39; (1941).&quot;;</span>
     <span class="doccomment">/// let caps = re.captures(text).unwrap();</span>
     <span class="doccomment">/// assert_eq!(caps.at(1), Some(&quot;Citizen Kane&quot;));</span>
     <span class="doccomment">/// assert_eq!(caps.at(2), Some(&quot;1941&quot;));</span>
     <span class="doccomment">/// assert_eq!(caps.at(0), Some(&quot;&#39;Citizen Kane&#39; (1941)&quot;));</span>
     <span class="doccomment">/// // You can also access the groups by index using the Index notation.</span>
     <span class="doccomment">/// // Note that this will panic on an invalid index.</span>
     <span class="doccomment">/// assert_eq!(&amp;caps[1], &quot;Citizen Kane&quot;);</span>
     <span class="doccomment">/// assert_eq!(&amp;caps[2], &quot;1941&quot;);</span>
     <span class="doccomment">/// assert_eq!(&amp;caps[0], &quot;&#39;Citizen Kane&#39; (1941)&quot;);</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Note that the full match is at capture group `0`. Each subsequent</span>
     <span class="doccomment">/// capture group is indexed by the order of its opening `(`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// We can make this example a bit clearer by using *named* capture groups:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;&#39;(?P&lt;title&gt;[^&#39;]+)&#39;\s+\((?P&lt;year&gt;\d{4})\)&quot;)</span>
     <span class="doccomment">///                .unwrap();</span>
     <span class="doccomment">/// let text = &quot;Not my favorite movie: &#39;Citizen Kane&#39; (1941).&quot;;</span>
     <span class="doccomment">/// let caps = re.captures(text).unwrap();</span>
     <span class="doccomment">/// assert_eq!(caps.name(&quot;title&quot;), Some(&quot;Citizen Kane&quot;));</span>
     <span class="doccomment">/// assert_eq!(caps.name(&quot;year&quot;), Some(&quot;1941&quot;));</span>
     <span class="doccomment">/// assert_eq!(caps.at(0), Some(&quot;&#39;Citizen Kane&#39; (1941)&quot;));</span>
     <span class="doccomment">/// // You can also access the groups by name using the Index notation.</span>
     <span class="doccomment">/// // Note that this will panic on an invalid group name.</span>
     <span class="doccomment">/// assert_eq!(&amp;caps[&quot;title&quot;], &quot;Citizen Kane&quot;);</span>
     <span class="doccomment">/// assert_eq!(&amp;caps[&quot;year&quot;], &quot;1941&quot;);</span>
     <span class="doccomment">/// assert_eq!(&amp;caps[0], &quot;&#39;Citizen Kane&#39; (1941)&quot;);</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Here we name the capture groups, which we can access with the `name`</span>
     <span class="doccomment">/// method or the `Index` notation with a `&amp;str`. Note that the named</span>
     <span class="doccomment">/// capture groups are still accessible with `at` or the `Index` notation</span>
     <span class="doccomment">/// with a `usize`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// The `0`th capture group is always unnamed, so it must always be</span>
     <span class="doccomment">/// accessed with `at(0)` or `[0]`.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;&gt;</span> {
         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">slots</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="prelude-val">None</span>; <span class="number">2</span> <span class="op">*</span> <span class="self">self</span>.<span class="ident">captures_len</span>()];
         <span class="self">self</span>.<span class="ident">read_captures_at</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">slots</span>, <span class="ident">text</span>, <span class="number">0</span>).<span class="ident">map</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">Captures</span> {
             <span class="ident">text</span>: <span class="ident">text</span>,
             <span class="ident">slots</span>: <span class="ident">slots</span>,
             <span class="ident">named_groups</span>: <span class="ident">NamedGroups</span>::<span class="ident">from_regex</span>(<span class="self">self</span>)
         })
     }

     <span class="doccomment">/// Returns the same as captures, but starts the search at the given</span>
     <span class="doccomment">/// offset and populates the capture locations given.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// The significance of the starting point is that it takes the surrounding</span>
     <span class="doccomment">/// context into consideration. For example, the `\A` anchor can only</span>
     <span class="doccomment">/// match when `start == 0`.</span>
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">read_captures_at</span>(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         <span class="ident">slots</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="ident">Slot</span>],
         <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>,
         <span class="ident">start</span>: <span class="ident">usize</span>,
     ) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">exec</span>) <span class="op">=&gt;</span> {
                 <span class="ident">exec</span>.<span class="ident">searcher_str</span>().<span class="ident">read_captures_at</span>(<span class="ident">slots</span>, <span class="ident">text</span>, <span class="ident">start</span>)
             }
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">plug</span>) <span class="op">=&gt;</span> {
                 <span class="ident">plug</span>.<span class="ident">read_captures_at</span>(<span class="ident">slots</span>, <span class="ident">text</span>, <span class="ident">start</span>)
             }
         }
     }

     <span class="doccomment">/// Returns an iterator over all the non-overlapping capture groups matched</span>
     <span class="doccomment">/// in `text`. This is operationally the same as `find_iter`, except it</span>
     <span class="doccomment">/// yields information about submatches.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Example</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// We can use this to find all movie titles and their release years in</span>
     <span class="doccomment">/// some text, where the movie is formatted like &quot;&#39;Title&#39; (xxxx)&quot;:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;&#39;(?P&lt;title&gt;[^&#39;]+)&#39;\s+\((?P&lt;year&gt;\d{4})\)&quot;)</span>
     <span class="doccomment">///                .unwrap();</span>
     <span class="doccomment">/// let text = &quot;&#39;Citizen Kane&#39; (1941), &#39;The Wizard of Oz&#39; (1939), &#39;M&#39; (1931).&quot;;</span>
     <span class="doccomment">/// for caps in re.captures_iter(text) {</span>
     <span class="doccomment">///     println!(&quot;Movie: {:?}, Released: {:?}&quot;,</span>
     <span class="doccomment">///              caps.name(&quot;title&quot;), caps.name(&quot;year&quot;));</span>
     <span class="doccomment">/// }</span>
     <span class="doccomment">/// // Output:</span>
     <span class="doccomment">/// // Movie: Citizen Kane, Released: 1941</span>
     <span class="doccomment">/// // Movie: The Wizard of Oz, Released: 1939</span>
     <span class="doccomment">/// // Movie: M, Released: 1931</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">captures_iter</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>(
         <span class="kw-2">&amp;</span><span class="lifetime">&#39;r</span> <span class="self">self</span>,
         <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>,
     ) <span class="op">-&gt;</span> <span class="ident">FindCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">exec</span>) <span class="op">=&gt;</span> {
                 <span class="kw">let</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">exec</span>.<span class="ident">searcher_str</span>().<span class="ident">captures_iter</span>(<span class="ident">text</span>);
                 <span class="ident">FindCaptures</span>(<span class="ident">FindCapturesInner</span>::<span class="ident">Dynamic</span>(<span class="ident">it</span>))
             }
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">plug</span>) <span class="op">=&gt;</span> {
                 <span class="kw">let</span> <span class="ident">it</span> <span class="op">=</span> <span class="ident">plug</span>.<span class="ident">captures_iter</span>(<span class="ident">text</span>);
                 <span class="ident">FindCaptures</span>(<span class="ident">FindCapturesInner</span>::<span class="ident">Plugin</span>(<span class="ident">it</span>))
             }
         }
     }

     <span class="doccomment">/// Returns an iterator of substrings of `text` delimited by a match of the</span>
     <span class="doccomment">/// regular expression. Namely, each element of the iterator corresponds to</span>
     <span class="doccomment">/// text that *isn&#39;t* matched by the regular expression.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// This method will *not* copy the text given.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Example</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// To split a string delimited by arbitrary amounts of spaces or tabs:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;[ \t]+&quot;).unwrap();</span>
     <span class="doccomment">/// let fields: Vec&lt;&amp;str&gt; = re.split(&quot;a b \t  c\td    e&quot;).collect();</span>
     <span class="doccomment">/// assert_eq!(fields, vec![&quot;a&quot;, &quot;b&quot;, &quot;c&quot;, &quot;d&quot;, &quot;e&quot;]);</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;r</span> <span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>) <span class="op">-&gt;</span> <span class="ident">RegexSplits</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
         <span class="ident">RegexSplits</span> {
             <span class="ident">finder</span>: <span class="self">self</span>.<span class="ident">find_iter</span>(<span class="ident">text</span>),
             <span class="ident">last</span>: <span class="number">0</span>,
         }
     }

     <span class="doccomment">/// Returns an iterator of at most `limit` substrings of `text` delimited</span>
     <span class="doccomment">/// by a match of the regular expression. (A `limit` of `0` will return no</span>
     <span class="doccomment">/// substrings.) Namely, each element of the iterator corresponds to text</span>
     <span class="doccomment">/// that *isn&#39;t* matched by the regular expression. The remainder of the</span>
     <span class="doccomment">/// string that is not split will be the last element in the iterator.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// This method will *not* copy the text given.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Example</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Get the first two words in some text:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;\W+&quot;).unwrap();</span>
     <span class="doccomment">/// let fields: Vec&lt;&amp;str&gt; = re.splitn(&quot;Hey! How are you?&quot;, 3).collect();</span>
     <span class="doccomment">/// assert_eq!(fields, vec!(&quot;Hey&quot;, &quot;How&quot;, &quot;are you?&quot;));</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">splitn</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;r</span> <span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>, <span class="ident">limit</span>: <span class="ident">usize</span>)
                          <span class="op">-&gt;</span> <span class="ident">RegexSplitsN</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
         <span class="ident">RegexSplitsN</span> {
             <span class="ident">splits</span>: <span class="self">self</span>.<span class="ident">split</span>(<span class="ident">text</span>),
             <span class="ident">n</span>: <span class="ident">limit</span>,
         }
     }

     <span class="doccomment">/// Replaces the leftmost-first match with the replacement provided.</span>
     <span class="doccomment">/// The replacement can be a regular string (where `$N` and `$name` are</span>
     <span class="doccomment">/// expanded to match capture groups) or a function that takes the matches&#39;</span>
     <span class="doccomment">/// `Captures` and returns the replaced string.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// If no match is found, then a copy of the string is returned unchanged.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Examples</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Note that this function is polymorphic with respect to the replacement.</span>
     <span class="doccomment">/// In typical usage, this can just be a normal string:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(&quot;[^01]+&quot;).unwrap();</span>
     <span class="doccomment">/// assert_eq!(re.replace(&quot;1078910&quot;, &quot;&quot;), &quot;1010&quot;);</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// But anything satisfying the `Replacer` trait will work. For example,</span>
     <span class="doccomment">/// a closure of type `|&amp;Captures| -&gt; String` provides direct access to the</span>
     <span class="doccomment">/// captures corresponding to a match. This allows one to access</span>
     <span class="doccomment">/// submatches easily:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # use regex::Captures; fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;([^,\s]+),\s+(\S+)&quot;).unwrap();</span>
     <span class="doccomment">/// let result = re.replace(&quot;Springsteen, Bruce&quot;, |caps: &amp;Captures| {</span>
     <span class="doccomment">///     format!(&quot;{} {}&quot;, caps.at(2).unwrap_or(&quot;&quot;), caps.at(1).unwrap_or(&quot;&quot;))</span>
     <span class="doccomment">/// });</span>
     <span class="doccomment">/// assert_eq!(result, &quot;Bruce Springsteen&quot;);</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// But this is a bit cumbersome to use all the time. Instead, a simple</span>
     <span class="doccomment">/// syntax is supported that expands `$name` into the corresponding capture</span>
     <span class="doccomment">/// group. Here&#39;s the last example, but using this expansion technique</span>
     <span class="doccomment">/// with named capture groups:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;(?P&lt;last&gt;[^,\s]+),\s+(?P&lt;first&gt;\S+)&quot;).unwrap();</span>
     <span class="doccomment">/// let result = re.replace(&quot;Springsteen, Bruce&quot;, &quot;$first $last&quot;);</span>
     <span class="doccomment">/// assert_eq!(result, &quot;Bruce Springsteen&quot;);</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Note that using `$2` instead of `$first` or `$1` instead of `$last`</span>
     <span class="doccomment">/// would produce the same result. To write a literal `$` use `$$`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Finally, sometimes you just want to replace a literal string with no</span>
     <span class="doccomment">/// submatch expansion. This can be done by wrapping a string with</span>
     <span class="doccomment">/// `NoExpand`:</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// use regex::NoExpand;</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// let re = Regex::new(r&quot;(?P&lt;last&gt;[^,\s]+),\s+(\S+)&quot;).unwrap();</span>
     <span class="doccomment">/// let result = re.replace(&quot;Springsteen, Bruce&quot;, NoExpand(&quot;$2 $last&quot;));</span>
     <span class="doccomment">/// assert_eq!(result, &quot;$2 $last&quot;);</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">replace</span><span class="op">&lt;</span><span class="ident">R</span>: <span class="ident">Replacer</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">rep</span>: <span class="ident">R</span>) <span class="op">-&gt;</span> <span class="ident">String</span> {
         <span class="self">self</span>.<span class="ident">replacen</span>(<span class="ident">text</span>, <span class="number">1</span>, <span class="ident">rep</span>)
     }

     <span class="doccomment">/// Replaces all non-overlapping matches in `text` with the replacement</span>
     <span class="doccomment">/// provided. This is the same as calling `replacen` with `limit` set to</span>
     <span class="doccomment">/// `0`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// See the documentation for `replace` for details on how to access</span>
     <span class="doccomment">/// submatches in the replacement string.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">replace_all</span><span class="op">&lt;</span><span class="ident">R</span>: <span class="ident">Replacer</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">rep</span>: <span class="ident">R</span>) <span class="op">-&gt;</span> <span class="ident">String</span> {
         <span class="self">self</span>.<span class="ident">replacen</span>(<span class="ident">text</span>, <span class="number">0</span>, <span class="ident">rep</span>)
     }

     <span class="doccomment">/// Replaces at most `limit` non-overlapping matches in `text` with the</span>
     <span class="doccomment">/// replacement provided. If `limit` is 0, then all non-overlapping matches</span>
     <span class="doccomment">/// are replaced.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// See the documentation for `replace` for details on how to access</span>
     <span class="doccomment">/// submatches in the replacement string.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">replacen</span><span class="op">&lt;</span><span class="ident">R</span>: <span class="ident">Replacer</span><span class="op">&gt;</span>(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>,
         <span class="ident">limit</span>: <span class="ident">usize</span>,
         <span class="kw-2">mut</span> <span class="ident">rep</span>: <span class="ident">R</span>,
     ) <span class="op">-&gt;</span> <span class="ident">String</span> {

         <span class="comment">// If we know that the replacement doesn&#39;t have any capture expansions,</span>
         <span class="comment">// then we can fast path. The fast path can make a tremendous</span>
         <span class="comment">// difference:</span>
         <span class="comment">//</span>
         <span class="comment">//   1) We use `find_iter` instead of `captures_iter`. Not asking for</span>
         <span class="comment">//      captures generally makes the regex engines faster.</span>
         <span class="comment">//   2) We don&#39;t need to look up all of the capture groups and do</span>
         <span class="comment">//      replacements inside the replacement string. We just push it</span>
         <span class="comment">//      at each match and be done with it.</span>
         <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">rep</span>) <span class="op">=</span> <span class="ident">rep</span>.<span class="ident">no_expand</span>() {
             <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">with_capacity</span>(<span class="ident">text</span>.<span class="ident">len</span>());
             <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">last_match</span> <span class="op">=</span> <span class="number">0</span>;
             <span class="kw">for</span> (<span class="ident">i</span>, (<span class="ident">s</span>, <span class="ident">e</span>)) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">find_iter</span>(<span class="ident">text</span>).<span class="ident">enumerate</span>() {
                 <span class="kw">if</span> <span class="ident">limit</span> <span class="op">&gt;</span> <span class="number">0</span> <span class="op">&amp;&amp;</span> <span class="ident">i</span> <span class="op">&gt;=</span> <span class="ident">limit</span> {
                     <span class="kw">break</span>
                 }
                 <span class="ident">new</span>.<span class="ident">push_str</span>(<span class="kw-2">&amp;</span><span class="ident">text</span>[<span class="ident">last_match</span>..<span class="ident">s</span>]);
                 <span class="ident">new</span>.<span class="ident">push_str</span>(<span class="kw-2">&amp;</span><span class="ident">rep</span>);
                 <span class="ident">last_match</span> <span class="op">=</span> <span class="ident">e</span>;
             }
             <span class="ident">new</span>.<span class="ident">push_str</span>(<span class="kw-2">&amp;</span><span class="ident">text</span>[<span class="ident">last_match</span>..]);
             <span class="kw">return</span> <span class="ident">new</span>;
         }

         <span class="comment">// The slower path, which we use if the replacement needs access to</span>
         <span class="comment">// capture groups.</span>
         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">new</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">with_capacity</span>(<span class="ident">text</span>.<span class="ident">len</span>());
         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">last_match</span> <span class="op">=</span> <span class="number">0</span>;
         <span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">cap</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">captures_iter</span>(<span class="ident">text</span>).<span class="ident">enumerate</span>() {
             <span class="kw">if</span> <span class="ident">limit</span> <span class="op">&gt;</span> <span class="number">0</span> <span class="op">&amp;&amp;</span> <span class="ident">i</span> <span class="op">&gt;=</span> <span class="ident">limit</span> {
                 <span class="kw">break</span>
             }
             <span class="comment">// unwrap on 0 is OK because captures only reports matches</span>
             <span class="kw">let</span> (<span class="ident">s</span>, <span class="ident">e</span>) <span class="op">=</span> <span class="ident">cap</span>.<span class="ident">pos</span>(<span class="number">0</span>).<span class="ident">unwrap</span>();
             <span class="ident">new</span>.<span class="ident">push_str</span>(<span class="kw-2">&amp;</span><span class="ident">text</span>[<span class="ident">last_match</span>..<span class="ident">s</span>]);
             <span class="ident">new</span>.<span class="ident">push_str</span>(<span class="kw-2">&amp;</span><span class="ident">rep</span>.<span class="ident">reg_replace</span>(<span class="kw-2">&amp;</span><span class="ident">cap</span>));
             <span class="ident">last_match</span> <span class="op">=</span> <span class="ident">e</span>;
         }
         <span class="ident">new</span>.<span class="ident">push_str</span>(<span class="kw-2">&amp;</span><span class="ident">text</span>[<span class="ident">last_match</span>..]);
         <span class="ident">new</span>
     }

     <span class="doccomment">/// Returns the end location of a match in the text given.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// This method may have the same performance characteristics as</span>
     <span class="doccomment">/// `is_match`, except it provides an end location for a match. In</span>
     <span class="doccomment">/// particular, the location returned *may be shorter* than the proper end</span>
     <span class="doccomment">/// of the leftmost-first match.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// # Example</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// Typically, `a+` would match the entire first sequence of `a` in some</span>
     <span class="doccomment">/// text, but `shortest_match` can give up as soon as it sees the first</span>
     <span class="doccomment">/// `a`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// ```rust</span>
     <span class="doccomment">/// # extern crate regex; use regex::Regex;</span>
     <span class="doccomment">/// # fn main() {</span>
     <span class="doccomment">/// let text = &quot;aaaaa&quot;;</span>
     <span class="doccomment">/// let pos = Regex::new(r&quot;a+&quot;).unwrap().shortest_match(text);</span>
     <span class="doccomment">/// assert_eq!(pos, Some(1));</span>
     <span class="doccomment">/// # }</span>
     <span class="doccomment">/// ```</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">shortest_match</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
         <span class="self">self</span>.<span class="ident">shortest_match_at</span>(<span class="ident">text</span>, <span class="number">0</span>)
     }

     <span class="doccomment">/// Returns the same as shortest_match, but starts the search at the given</span>
     <span class="doccomment">/// offset.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// The significance of the starting point is that it takes the surrounding</span>
     <span class="doccomment">/// context into consideration. For example, the `\A` anchor can only</span>
     <span class="doccomment">/// match when `start == 0`.</span>
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">shortest_match_at</span>(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>,
         <span class="ident">start</span>: <span class="ident">usize</span>,
     ) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">exec</span>) <span class="op">=&gt;</span> {
                 <span class="ident">exec</span>.<span class="ident">searcher_str</span>().<span class="ident">shortest_match_at</span>(<span class="ident">text</span>, <span class="ident">start</span>)
             }
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">plug</span>) <span class="op">=&gt;</span> <span class="ident">plug</span>.<span class="ident">shortest_match_at</span>(<span class="ident">text</span>, <span class="ident">start</span>),
         }
     }

     <span class="doccomment">/// Returns the original string of this regex.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_str</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="kw-2">&amp;</span><span class="ident">str</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">exec</span>) <span class="op">=&gt;</span> <span class="kw-2">&amp;</span><span class="ident">exec</span>.<span class="ident">regex_strings</span>()[<span class="number">0</span>],
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">plug</span>) <span class="op">=&gt;</span> <span class="kw-2">&amp;</span><span class="ident">plug</span>.<span class="ident">original</span>,
         }
     }

     <span class="doccomment">/// Returns an iterator over the capture names.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">capture_names</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">CaptureNames</span> {
         <span class="ident">CaptureNames</span>(<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">n</span>) <span class="op">=&gt;</span> <span class="ident">_CaptureNames</span>::<span class="ident">Plugin</span>(<span class="ident">n</span>.<span class="ident">names</span>.<span class="ident">iter</span>()),
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">d</span>) <span class="op">=&gt;</span> {
                 <span class="ident">_CaptureNames</span>::<span class="ident">Dynamic</span>(<span class="ident">d</span>.<span class="ident">capture_names</span>().<span class="ident">iter</span>())
             }
         })
     }

     <span class="doccomment">/// Returns the number of captures.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">captures_len</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">usize</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">n</span>) <span class="op">=&gt;</span> <span class="ident">n</span>.<span class="ident">names</span>.<span class="ident">len</span>(),
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">d</span>) <span class="op">=&gt;</span> <span class="ident">d</span>.<span class="ident">capture_names</span>().<span class="ident">len</span>()
         }
     }
 }

 <span class="doccomment">/// An iterator over the names of all possible captures.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `None` indicates an unnamed capture; the first element (capture 0, the</span>
 <span class="doccomment">/// whole matched region) is always unnamed.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;r` is the lifetime of the compiled regular expression.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CaptureNames</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span><span class="op">&gt;</span>(<span class="ident">_CaptureNames</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span><span class="op">&gt;</span>);

 <span class="kw">enum</span> <span class="ident">_CaptureNames</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span><span class="op">&gt;</span> {
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="ident">Plugin</span>(::<span class="ident">std</span>::<span class="ident">slice</span>::<span class="ident">Iter</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span><span class="op">&gt;&gt;</span>),
     <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
     <span class="ident">Dynamic</span>(::<span class="ident">std</span>::<span class="ident">slice</span>::<span class="ident">Iter</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;&gt;</span>)
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">CaptureNames</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;r</span> <span class="ident">str</span><span class="op">&gt;</span>;

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;r</span> <span class="ident">str</span><span class="op">&gt;&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_CaptureNames</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">i</span>) <span class="op">=&gt;</span> <span class="ident">i</span>.<span class="ident">next</span>().<span class="ident">cloned</span>(),
             <span class="ident">_CaptureNames</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">i</span>) <span class="op">=&gt;</span> {
                 <span class="ident">i</span>.<span class="ident">next</span>().<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">o</span><span class="op">|</span> <span class="ident">o</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">s</span>.<span class="ident">as_ref</span>()))
             }
         }
     }

     <span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span>) {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">_CaptureNames</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">i</span>)  <span class="op">=&gt;</span> <span class="ident">i</span>.<span class="ident">size_hint</span>(),
             <span class="ident">_CaptureNames</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">i</span>) <span class="op">=&gt;</span> <span class="ident">i</span>.<span class="ident">size_hint</span>(),
         }
     }
 }

 <span class="doccomment">/// NoExpand indicates literal string replacement.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// It can be used with `replace` and `replace_all` to do a literal</span>
 <span class="doccomment">/// string replacement without expanding `$name` to their corresponding</span>
 <span class="doccomment">/// capture groups.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;t` is the lifetime of the literal text.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">NoExpand</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span>(<span class="kw">pub</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>);

 <span class="doccomment">/// Replacer describes types that can be used to replace matches in a string.</span>
 <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Replacer</span> {
     <span class="doccomment">/// Returns a possibly owned string that is used to replace the match</span>
     <span class="doccomment">/// corresponding to the `caps` capture group.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// The `&#39;a` lifetime refers to the lifetime of a borrowed string when</span>
     <span class="doccomment">/// a new owned string isn&#39;t needed (e.g., for `NoExpand`).</span>
     <span class="kw">fn</span> <span class="ident">reg_replace</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">caps</span>: <span class="kw-2">&amp;</span><span class="ident">Captures</span>) <span class="op">-&gt;</span> <span class="ident">Cow</span><span class="op">&lt;</span><span class="ident">str</span><span class="op">&gt;</span>;

     <span class="doccomment">/// Returns a possibly owned string that never needs expansion.</span>
     <span class="kw">fn</span> <span class="ident">no_expand</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Cow</span><span class="op">&lt;</span><span class="ident">str</span><span class="op">&gt;&gt;</span> { <span class="prelude-val">None</span> }
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Replacer</span> <span class="kw">for</span> <span class="ident">NoExpand</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">fn</span> <span class="ident">reg_replace</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, _: <span class="kw-2">&amp;</span><span class="ident">Captures</span>) <span class="op">-&gt;</span> <span class="ident">Cow</span><span class="op">&lt;</span><span class="ident">str</span><span class="op">&gt;</span> {
         <span class="self">self</span>.<span class="number">0</span>.<span class="ident">into</span>()
     }

     <span class="kw">fn</span> <span class="ident">no_expand</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Cow</span><span class="op">&lt;</span><span class="ident">str</span><span class="op">&gt;&gt;</span> {
         <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">into</span>())
     }
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Replacer</span> <span class="kw">for</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span> {
     <span class="kw">fn</span> <span class="ident">reg_replace</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">caps</span>: <span class="kw-2">&amp;</span><span class="ident">Captures</span>) <span class="op">-&gt;</span> <span class="ident">Cow</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span>, <span class="ident">str</span><span class="op">&gt;</span> {
         <span class="ident">caps</span>.<span class="ident">expand</span>(<span class="kw-2">*</span><span class="self">self</span>).<span class="ident">into</span>()
     }

     <span class="kw">fn</span> <span class="ident">no_expand</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Cow</span><span class="op">&lt;</span><span class="ident">str</span><span class="op">&gt;&gt;</span> {
         <span class="comment">// if there is a $ there may be an expansion</span>
         <span class="kw">match</span> <span class="self">self</span>.<span class="ident">find</span>(<span class="string">&#39;$&#39;</span>) {
             <span class="prelude-val">Some</span>(_) <span class="op">=&gt;</span> <span class="prelude-val">None</span>,
             <span class="prelude-val">None</span> <span class="op">=&gt;</span> <span class="prelude-val">Some</span>((<span class="kw-2">*</span><span class="self">self</span>).<span class="ident">into</span>()),
         }
     }
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="ident">F</span><span class="op">&gt;</span> <span class="ident">Replacer</span> <span class="kw">for</span> <span class="ident">F</span> <span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&amp;</span><span class="ident">Captures</span>) <span class="op">-&gt;</span> <span class="ident">String</span> {
     <span class="kw">fn</span> <span class="ident">reg_replace</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">caps</span>: <span class="kw-2">&amp;</span><span class="ident">Captures</span>) <span class="op">-&gt;</span> <span class="ident">Cow</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span>, <span class="ident">str</span><span class="op">&gt;</span> {
         (<span class="kw-2">*</span><span class="self">self</span>)(<span class="ident">caps</span>).<span class="ident">into</span>()
     }
 }

 <span class="doccomment">/// Yields all substrings delimited by a regular expression match.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;r` is the lifetime of the compiled regular expression and `&#39;t` is the</span>
 <span class="doccomment">/// lifetime of the string being split.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RegexSplits</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="ident">finder</span>: <span class="ident">FindMatches</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>,
     <span class="ident">last</span>: <span class="ident">usize</span>,
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">RegexSplits</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>;

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span><span class="op">&gt;</span> {
         <span class="kw">let</span> <span class="ident">text</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">finder</span>.<span class="ident">text</span>();
         <span class="kw">match</span> <span class="self">self</span>.<span class="ident">finder</span>.<span class="ident">next</span>() {
             <span class="prelude-val">None</span> <span class="op">=&gt;</span> {
                 <span class="kw">if</span> <span class="self">self</span>.<span class="ident">last</span> <span class="op">&gt;=</span> <span class="ident">text</span>.<span class="ident">len</span>() {
                     <span class="prelude-val">None</span>
                 } <span class="kw">else</span> {
                     <span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">text</span>[<span class="self">self</span>.<span class="ident">last</span>..];
                     <span class="self">self</span>.<span class="ident">last</span> <span class="op">=</span> <span class="ident">text</span>.<span class="ident">len</span>();
                     <span class="prelude-val">Some</span>(<span class="ident">s</span>)
                 }
             }
             <span class="prelude-val">Some</span>((<span class="ident">s</span>, <span class="ident">e</span>)) <span class="op">=&gt;</span> {
                 <span class="kw">let</span> <span class="ident">matched</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">text</span>[<span class="self">self</span>.<span class="ident">last</span>..<span class="ident">s</span>];
                 <span class="self">self</span>.<span class="ident">last</span> <span class="op">=</span> <span class="ident">e</span>;
                 <span class="prelude-val">Some</span>(<span class="ident">matched</span>)
             }
         }
     }
 }

 <span class="doccomment">/// Yields at most `N` substrings delimited by a regular expression match.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The last substring will be whatever remains after splitting.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;r` is the lifetime of the compiled regular expression and `&#39;t` is the</span>
 <span class="doccomment">/// lifetime of the string being split.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RegexSplitsN</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="ident">splits</span>: <span class="ident">RegexSplits</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>,
     <span class="ident">n</span>: <span class="ident">usize</span>,
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">RegexSplitsN</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>;

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span><span class="op">&gt;</span> {
         <span class="kw">if</span> <span class="self">self</span>.<span class="ident">n</span> <span class="op">==</span> <span class="number">0</span> {
             <span class="kw">return</span> <span class="prelude-val">None</span>
         }
         <span class="self">self</span>.<span class="ident">n</span> <span class="op">-=</span> <span class="number">1</span>;
         <span class="kw">if</span> <span class="self">self</span>.<span class="ident">n</span> <span class="op">==</span> <span class="number">0</span> {
             <span class="kw">let</span> <span class="ident">text</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">splits</span>.<span class="ident">finder</span>.<span class="ident">text</span>();
             <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="ident">text</span>[<span class="self">self</span>.<span class="ident">splits</span>.<span class="ident">last</span>..])
         } <span class="kw">else</span> {
             <span class="self">self</span>.<span class="ident">splits</span>.<span class="ident">next</span>()
         }
     }
 }

 <span class="kw">enum</span> <span class="ident">NamedGroups</span> {
     <span class="ident">Plugin</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> [(<span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span>, <span class="ident">usize</span>)]),
     <span class="ident">Dynamic</span>(<span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">HashMap</span><span class="op">&lt;</span><span class="ident">String</span>, <span class="ident">usize</span><span class="op">&gt;&gt;</span>),
 }

 <span class="kw">impl</span> <span class="ident">NamedGroups</span> {
     <span class="kw">fn</span> <span class="ident">from_regex</span>(<span class="ident">regex</span>: <span class="kw-2">&amp;</span><span class="ident">Regex</span>) <span class="op">-&gt;</span> <span class="ident">NamedGroups</span> {
         <span class="kw">match</span> <span class="ident">regex</span>.<span class="number">0</span> {
             <span class="ident">_Regex</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">plug</span>) <span class="op">=&gt;</span> <span class="ident">NamedGroups</span>::<span class="ident">Plugin</span>(<span class="kw-2">&amp;</span><span class="ident">plug</span>.<span class="ident">groups</span>),
             <span class="ident">_Regex</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">exec</span>) <span class="op">=&gt;</span> {
                 <span class="ident">NamedGroups</span>::<span class="ident">Dynamic</span>(<span class="ident">exec</span>.<span class="ident">capture_name_idx</span>().<span class="ident">clone</span>())
             }
         }
     }

     <span class="kw">fn</span> <span class="ident">pos</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
             <span class="ident">NamedGroups</span>::<span class="ident">Plugin</span>(<span class="ident">groups</span>) <span class="op">=&gt;</span> {
                 <span class="ident">groups</span>.<span class="ident">binary_search_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span>(<span class="ident">n</span>, _)<span class="op">|</span> <span class="ident">n</span>.<span class="ident">cmp</span>(<span class="ident">name</span>))
                       .<span class="ident">ok</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> <span class="ident">groups</span>[<span class="ident">i</span>].<span class="number">1</span>)
             },
             <span class="ident">NamedGroups</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">groups</span>) <span class="op">=&gt;</span> {
                 <span class="ident">groups</span>.<span class="ident">get</span>(<span class="ident">name</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">i</span>)
             },
         }
     }

     <span class="kw">fn</span> <span class="ident">iter</span><span class="op">&lt;</span><span class="lifetime">&#39;n</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;n</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">NamedGroupsIter</span><span class="op">&lt;</span><span class="lifetime">&#39;n</span><span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
             <span class="ident">NamedGroups</span>::<span class="ident">Plugin</span>(<span class="ident">g</span>) <span class="op">=&gt;</span> <span class="ident">NamedGroupsIter</span>::<span class="ident">Plugin</span>(<span class="ident">g</span>.<span class="ident">iter</span>()),
             <span class="ident">NamedGroups</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">g</span>) <span class="op">=&gt;</span> <span class="ident">NamedGroupsIter</span>::<span class="ident">Dynamic</span>(<span class="ident">g</span>.<span class="ident">iter</span>()),
         }
     }
 }

 <span class="kw">enum</span> <span class="ident">NamedGroupsIter</span><span class="op">&lt;</span><span class="lifetime">&#39;n</span><span class="op">&gt;</span> {
     <span class="ident">Plugin</span>(::<span class="ident">std</span>::<span class="ident">slice</span>::<span class="ident">Iter</span><span class="op">&lt;</span><span class="lifetime">&#39;static</span>, (<span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span>, <span class="ident">usize</span>)<span class="op">&gt;</span>),
     <span class="ident">Dynamic</span>(::<span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">hash_map</span>::<span class="ident">Iter</span><span class="op">&lt;</span><span class="lifetime">&#39;n</span>, <span class="ident">String</span>, <span class="ident">usize</span><span class="op">&gt;</span>),
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;n</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">NamedGroupsIter</span><span class="op">&lt;</span><span class="lifetime">&#39;n</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="kw-2">&amp;</span><span class="lifetime">&#39;n</span> <span class="ident">str</span>, <span class="ident">usize</span>);

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
             <span class="ident">NamedGroupsIter</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">it</span>) <span class="op">=&gt;</span> <span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">v</span><span class="op">|</span> <span class="ident">v</span>),
             <span class="ident">NamedGroupsIter</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">it</span>) <span class="op">=&gt;</span> {
                 <span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">s</span>, <span class="ident">i</span>)<span class="op">|</span> (<span class="ident">s</span>.<span class="ident">as_ref</span>(), <span class="kw-2">*</span><span class="ident">i</span>))
             }
         }
     }
 }

 <span class="doccomment">/// Captures represents a group of captured strings for a single match.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The 0th capture always corresponds to the entire match. Each subsequent</span>
 <span class="doccomment">/// index corresponds to the next capture group in the regex. If a capture</span>
 <span class="doccomment">/// group is named, then the matched string is *also* available via the `name`</span>
 <span class="doccomment">/// method. (Note that the 0th capture is always unnamed and so must be</span>
 <span class="doccomment">/// accessed with the `at` method.)</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// Positions returned from a capture group are always byte indices.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;t` is the lifetime of the matched text.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span>,
     <span class="ident">slots</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;&gt;</span>,
     <span class="ident">named_groups</span>: <span class="ident">NamedGroups</span>,
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="doccomment">/// Returns the start and end positions of the Nth capture group. Returns</span>
     <span class="doccomment">/// `None` if `i` is not a valid capture group or if the capture group did</span>
     <span class="doccomment">/// not match anything. The positions returned are *always* byte indices</span>
     <span class="doccomment">/// with respect to the original string matched.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">pos</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">i</span>: <span class="ident">usize</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">&gt;</span> {
         <span class="kw">let</span> (<span class="ident">s</span>, <span class="ident">e</span>) <span class="op">=</span> (<span class="ident">i</span> <span class="op">*</span> <span class="number">2</span>, <span class="ident">i</span> <span class="op">*</span> <span class="number">2</span> <span class="op">+</span> <span class="number">1</span>);
         <span class="kw">match</span> (<span class="self">self</span>.<span class="ident">slots</span>.<span class="ident">get</span>(<span class="ident">s</span>), <span class="self">self</span>.<span class="ident">slots</span>.<span class="ident">get</span>(<span class="ident">e</span>)) {
             (<span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="prelude-val">Some</span>(<span class="ident">s</span>)), <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="prelude-val">Some</span>(<span class="ident">e</span>))) <span class="op">=&gt;</span> <span class="prelude-val">Some</span>((<span class="ident">s</span>, <span class="ident">e</span>)),
             _ <span class="op">=&gt;</span> <span class="prelude-val">None</span>,
         }
     }

     <span class="doccomment">/// Returns the matched string for the capture group `i`.  If `i` isn&#39;t</span>
     <span class="doccomment">/// a valid capture group or didn&#39;t match anything, then `None` is</span>
     <span class="doccomment">/// returned.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">at</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">i</span>: <span class="ident">usize</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span><span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="ident">pos</span>(<span class="ident">i</span>) {
             <span class="prelude-val">None</span> <span class="op">=&gt;</span> <span class="prelude-val">None</span>,
             <span class="prelude-val">Some</span>((<span class="ident">s</span>, <span class="ident">e</span>)) <span class="op">=&gt;</span> <span class="prelude-val">Some</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">text</span>[<span class="ident">s</span>..<span class="ident">e</span>])
         }
     }

     <span class="doccomment">/// Returns the matched string for the capture group named `name`.  If</span>
     <span class="doccomment">/// `name` isn&#39;t a valid capture group or didn&#39;t match anything, then</span>
     <span class="doccomment">/// `None` is returned.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">name</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span><span class="op">&gt;</span> {
         <span class="self">self</span>.<span class="ident">named_groups</span>.<span class="ident">pos</span>(<span class="ident">name</span>).<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> <span class="self">self</span>.<span class="ident">at</span>(<span class="ident">i</span>))
     }

     <span class="doccomment">/// Creates an iterator of all the capture groups in order of appearance</span>
     <span class="doccomment">/// in the regular expression.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">iter</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">SubCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
         <span class="ident">SubCaptures</span> { <span class="ident">idx</span>: <span class="number">0</span>, <span class="ident">caps</span>: <span class="self">self</span>, }
     }

     <span class="doccomment">/// Creates an iterator of all the capture group positions in order of</span>
     <span class="doccomment">/// appearance in the regular expression. Positions are byte indices</span>
     <span class="doccomment">/// in terms of the original string matched.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">iter_pos</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">SubCapturesPos</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
         <span class="ident">SubCapturesPos</span> { <span class="ident">idx</span>: <span class="number">0</span>, <span class="ident">slots</span>: <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">slots</span> }
     }

     <span class="doccomment">/// Creates an iterator of all named groups as an tuple with the group</span>
     <span class="doccomment">/// name and the value. The iterator returns these values in arbitrary</span>
     <span class="doccomment">/// order.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">iter_named</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">SubCapturesNamed</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
         <span class="ident">SubCapturesNamed</span> {
             <span class="ident">caps</span>: <span class="self">self</span>,
             <span class="ident">names</span>: <span class="self">self</span>.<span class="ident">named_groups</span>.<span class="ident">iter</span>()
         }
     }

     <span class="doccomment">/// Expands all instances of `$name` in `text` to the corresponding capture</span>
     <span class="doccomment">/// group `name`.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// `name` may be an integer corresponding to the index of the</span>
     <span class="doccomment">/// capture group (counted by order of opening parenthesis where `0` is the</span>
     <span class="doccomment">/// entire match) or it can be a name (consisting of letters, digits or</span>
     <span class="doccomment">/// underscores) corresponding to a named capture group.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// If `name` isn&#39;t a valid capture group (whether the name doesn&#39;t exist or</span>
     <span class="doccomment">/// isn&#39;t a valid index), then it is replaced with the empty string.</span>
     <span class="doccomment">///</span>
     <span class="doccomment">/// To write a literal `$` use `$$`.</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">expand</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">text</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-&gt;</span> <span class="ident">String</span> {
         <span class="kw">const</span> <span class="ident">REPLACE_EXPAND</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">r&quot;(?x)
           (?P&lt;before&gt;^|\b|[^$]) # Ignore `$$name`.
           \$
           (?P&lt;name&gt; # Match the actual capture name. Can be...
             [0-9]+  # A sequence of digits (for indexed captures), or...
             |
             [_a-zA-Z][_0-9a-zA-Z]* # A name for named captures.
           )
         &quot;</span>;
         <span class="comment">// How evil can you get?</span>
         <span class="kw">let</span> <span class="ident">re</span> <span class="op">=</span> <span class="ident">Regex</span>::<span class="ident">new</span>(<span class="ident">REPLACE_EXPAND</span>).<span class="ident">unwrap</span>();
         <span class="kw">let</span> <span class="ident">text</span> <span class="op">=</span> <span class="ident">re</span>.<span class="ident">replace_all</span>(<span class="ident">text</span>, <span class="op">|</span><span class="ident">refs</span>: <span class="kw-2">&amp;</span><span class="ident">Captures</span><span class="op">|</span> <span class="op">-&gt;</span> <span class="ident">String</span> {
             <span class="kw">let</span> <span class="ident">before</span> <span class="op">=</span> <span class="ident">refs</span>.<span class="ident">name</span>(<span class="string">&quot;before&quot;</span>).<span class="ident">unwrap_or</span>(<span class="string">&quot;&quot;</span>);
             <span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="ident">refs</span>.<span class="ident">name</span>(<span class="string">&quot;name&quot;</span>).<span class="ident">unwrap_or</span>(<span class="string">&quot;&quot;</span>);
             <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}{}&quot;</span>, <span class="ident">before</span>, <span class="kw">match</span> <span class="ident">name</span>.<span class="ident">parse</span>::<span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span>() {
                 <span class="prelude-val">Err</span>(_) <span class="op">=&gt;</span> <span class="self">self</span>.<span class="ident">name</span>(<span class="ident">name</span>).<span class="ident">unwrap_or</span>(<span class="string">&quot;&quot;</span>).<span class="ident">to_owned</span>(),
                 <span class="prelude-val">Ok</span>(<span class="ident">i</span>) <span class="op">=&gt;</span> <span class="self">self</span>.<span class="ident">at</span>(<span class="ident">i</span>).<span class="ident">unwrap_or</span>(<span class="string">&quot;&quot;</span>).<span class="ident">to_owned</span>(),
             })
         });
         <span class="kw">let</span> <span class="ident">re</span> <span class="op">=</span> <span class="ident">Regex</span>::<span class="ident">new</span>(<span class="string">r&quot;\$\$&quot;</span>).<span class="ident">unwrap</span>();
         <span class="ident">re</span>.<span class="ident">replace_all</span>(<span class="kw-2">&amp;</span><span class="ident">text</span>, <span class="ident">NoExpand</span>(<span class="string">&quot;$&quot;</span>))
     }

     <span class="doccomment">/// Returns the number of captured groups.</span>
     <span class="attribute">#[<span class="ident">inline</span>]</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">usize</span> {
         <span class="self">self</span>.<span class="ident">slots</span>.<span class="ident">len</span>() <span class="op">/</span> <span class="number">2</span>
     }

     <span class="doccomment">/// Returns true if and only if there are no captured groups.</span>
     <span class="attribute">#[<span class="ident">inline</span>]</span>
     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">bool</span> {
         <span class="self">self</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span>
     }
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
         <span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">&quot;Captures&quot;</span>).<span class="ident">field</span>(<span class="kw-2">&amp;</span><span class="ident">CapturesDebug</span>(<span class="self">self</span>)).<span class="ident">finish</span>()
     }
 }

 <span class="kw">struct</span> <span class="ident">CapturesDebug</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span>, <span class="lifetime">&#39;t</span>: <span class="lifetime">&#39;c</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span>);

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">CapturesDebug</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
         <span class="comment">// We&#39;d like to show something nice here, even if it means an</span>
         <span class="comment">// allocation to build a reverse index.</span>
         <span class="kw">let</span> <span class="ident">slot_to_name</span>: <span class="ident">HashMap</span><span class="op">&lt;</span><span class="ident">usize</span>, <span class="kw-2">&amp;</span><span class="ident">str</span><span class="op">&gt;</span> <span class="op">=</span>
             <span class="self">self</span>.<span class="number">0</span>.<span class="ident">named_groups</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">a</span>, <span class="ident">b</span>)<span class="op">|</span> (<span class="ident">b</span>, <span class="ident">a</span>)).<span class="ident">collect</span>();
         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">f</span>.<span class="ident">debug_map</span>();
         <span class="kw">for</span> (<span class="ident">slot</span>, <span class="ident">m</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">iter_pos</span>().<span class="ident">enumerate</span>() {
             <span class="kw">let</span> <span class="ident">m</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">s</span>, <span class="ident">e</span>)<span class="op">|</span> <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">text</span>[<span class="ident">s</span>..<span class="ident">e</span>]);
             <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">name</span>) <span class="op">=</span> <span class="ident">slot_to_name</span>.<span class="ident">get</span>(<span class="kw-2">&amp;</span><span class="ident">slot</span>) {
                 <span class="ident">map</span>.<span class="ident">entry</span>(<span class="kw-2">&amp;</span><span class="ident">name</span>, <span class="kw-2">&amp;</span><span class="ident">m</span>);
             } <span class="kw">else</span> {
                 <span class="ident">map</span>.<span class="ident">entry</span>(<span class="kw-2">&amp;</span><span class="ident">slot</span>, <span class="kw-2">&amp;</span><span class="ident">m</span>);
             }
         }
         <span class="ident">map</span>.<span class="ident">finish</span>()
     }
 }

 <span class="doccomment">/// Get a group by index.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;t` is the lifetime of the matched text.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The text can&#39;t outlive the `Captures` object if this method is</span>
 <span class="doccomment">/// used, because of how `Index` is defined (normally `a[i]` is part</span>
 <span class="doccomment">/// of `a` and can&#39;t outlive it); to do that, use `at()` instead.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// # Panics</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// If there is no group at the given index.</span>
 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Index</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">str</span>;

     <span class="kw">fn</span> <span class="ident">index</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">i</span>: <span class="ident">usize</span>) <span class="op">-&gt;</span> <span class="kw-2">&amp;</span><span class="ident">str</span> {
         <span class="self">self</span>.<span class="ident">at</span>(<span class="ident">i</span>).<span class="ident">unwrap_or_else</span>(<span class="op">||</span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;no group at index &#39;{}&#39;&quot;</span>, <span class="ident">i</span>))
     }
 }

 <span class="doccomment">/// Get a group by name.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;t` is the lifetime of the matched text and `&#39;i` is the lifetime</span>
 <span class="doccomment">/// of the group name (the index).</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The text can&#39;t outlive the `Captures` object if this method is</span>
 <span class="doccomment">/// used, because of how `Index` is defined (normally `a[i]` is part</span>
 <span class="doccomment">/// of `a` and can&#39;t outlive it); to do that, use `name` instead.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// # Panics</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// If there is no group named by the given value.</span>
 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span>, <span class="lifetime">&#39;i</span><span class="op">&gt;</span> <span class="ident">Index</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;i</span> <span class="ident">str</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">str</span>;

     <span class="kw">fn</span> <span class="ident">index</span><span class="op">&lt;</span><span class="lifetime">&#39;a</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="self">self</span>, <span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;i</span> <span class="ident">str</span>) <span class="op">-&gt;</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;a</span> <span class="ident">str</span> {
         <span class="self">self</span>.<span class="ident">name</span>(<span class="ident">name</span>).<span class="ident">unwrap_or_else</span>(<span class="op">||</span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;no group named &#39;{}&#39;&quot;</span>, <span class="ident">name</span>))
     }
 }

 <span class="doccomment">/// An iterator over capture groups for a particular match of a regular</span>
 <span class="doccomment">/// expression.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;c` is the lifetime of the captures.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SubCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> {
     <span class="ident">idx</span>: <span class="ident">usize</span>,
     <span class="ident">caps</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span>,
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SubCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">str</span><span class="op">&gt;</span>;

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">str</span><span class="op">&gt;&gt;</span> {
         <span class="kw">if</span> <span class="self">self</span>.<span class="ident">idx</span> <span class="op">&lt;</span> <span class="self">self</span>.<span class="ident">caps</span>.<span class="ident">len</span>() {
             <span class="self">self</span>.<span class="ident">idx</span> <span class="op">+=</span> <span class="number">1</span>;
             <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">caps</span>.<span class="ident">at</span>(<span class="self">self</span>.<span class="ident">idx</span> <span class="op">-</span> <span class="number">1</span>))
         } <span class="kw">else</span> {
             <span class="prelude-val">None</span>
         }
     }
 }

 <span class="doccomment">/// An iterator over capture group positions for a particular match of a</span>
 <span class="doccomment">/// regular expression.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// Positions are byte indices in terms of the original string matched.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;c` is the lifetime of the captures.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SubCapturesPos</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> {
     <span class="ident">idx</span>: <span class="ident">usize</span>,
     <span class="ident">slots</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> [<span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span>]
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SubCapturesPos</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">&gt;</span>;

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">&gt;&gt;</span> {
         <span class="kw">if</span> <span class="self">self</span>.<span class="ident">idx</span> <span class="op">&gt;=</span> <span class="self">self</span>.<span class="ident">slots</span>.<span class="ident">len</span>() {
             <span class="kw">return</span> <span class="prelude-val">None</span>
         }
         <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="kw">match</span> (<span class="self">self</span>.<span class="ident">slots</span>[<span class="self">self</span>.<span class="ident">idx</span>], <span class="self">self</span>.<span class="ident">slots</span>[<span class="self">self</span>.<span class="ident">idx</span> <span class="op">+</span> <span class="number">1</span>]) {
             (<span class="prelude-val">Some</span>(<span class="ident">s</span>), <span class="prelude-val">Some</span>(<span class="ident">e</span>)) <span class="op">=&gt;</span> <span class="prelude-val">Some</span>((<span class="ident">s</span>, <span class="ident">e</span>)),
             (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>) <span class="op">=&gt;</span> <span class="prelude-val">None</span>,
             _ <span class="op">=&gt;</span> <span class="macro">unreachable</span><span class="macro">!</span>()
         };
         <span class="self">self</span>.<span class="ident">idx</span> <span class="op">+=</span> <span class="number">2</span>;
         <span class="prelude-val">Some</span>(<span class="ident">r</span>)
     }
 }

 <span class="doccomment">/// An Iterator over named capture groups as a tuple with the group</span>
 <span class="doccomment">/// name and the value.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;c` is the lifetime of the captures.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SubCapturesNamed</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> {
     <span class="ident">caps</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span>,
     <span class="ident">names</span>: <span class="ident">NamedGroupsIter</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span>,
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SubCapturesNamed</span><span class="op">&lt;</span><span class="lifetime">&#39;c</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">str</span>, <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">str</span><span class="op">&gt;</span>);

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">str</span>, <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;c</span> <span class="ident">str</span><span class="op">&gt;</span>)<span class="op">&gt;</span> {
         <span class="self">self</span>.<span class="ident">names</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">name</span>, <span class="ident">pos</span>)<span class="op">|</span> (<span class="ident">name</span>, <span class="self">self</span>.<span class="ident">caps</span>.<span class="ident">at</span>(<span class="ident">pos</span>)))
     }
 }

 <span class="doccomment">/// An iterator that yields all non-overlapping capture groups matching a</span>
 <span class="doccomment">/// particular regular expression.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The iterator stops when no more matches can be found.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;r` is the lifetime of the compiled regular expression and `&#39;t` is the</span>
 <span class="doccomment">/// lifetime of the matched string.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">FindCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>(<span class="ident">FindCapturesInner</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>);

 <span class="kw">enum</span> <span class="ident">FindCapturesInner</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="ident">Dynamic</span>(<span class="ident">re_trait</span>::<span class="ident">FindCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span>, <span class="ident">ExecNoSyncStr</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span><span class="op">&gt;&gt;</span>),
     <span class="ident">Plugin</span>(<span class="ident">re_trait</span>::<span class="ident">FindCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span>, <span class="ident">Plugin</span><span class="op">&gt;</span>),
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">FindCaptures</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;</span>;

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Captures</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span><span class="op">&gt;&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">FindCapturesInner</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">it</span>) <span class="op">=&gt;</span> {
                 <span class="kw">let</span> <span class="ident">named</span> <span class="op">=</span> <span class="ident">it</span>.<span class="ident">regex</span>().<span class="ident">capture_name_idx</span>().<span class="ident">clone</span>();
                 <span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">slots</span><span class="op">|</span> <span class="ident">Captures</span> {
                     <span class="ident">text</span>: <span class="ident">it</span>.<span class="ident">text</span>(),
                     <span class="ident">slots</span>: <span class="ident">slots</span>,
                     <span class="ident">named_groups</span>: <span class="ident">NamedGroups</span>::<span class="ident">Dynamic</span>(<span class="ident">named</span>),
                 })
             }
             <span class="ident">FindCapturesInner</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">it</span>) <span class="op">=&gt;</span> {
                 <span class="ident">it</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">slots</span><span class="op">|</span> <span class="ident">Captures</span> {
                     <span class="ident">text</span>: <span class="ident">it</span>.<span class="ident">text</span>(),
                     <span class="ident">slots</span>: <span class="ident">slots</span>,
                     <span class="ident">named_groups</span>: <span class="ident">NamedGroups</span>::<span class="ident">Plugin</span>(<span class="ident">it</span>.<span class="ident">regex</span>().<span class="ident">groups</span>),
                 })
             }
         }
     }
 }

 <span class="doccomment">/// An iterator over all non-overlapping matches for a particular string.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// The iterator yields a tuple of integers corresponding to the start and end</span>
 <span class="doccomment">/// of the match. The indices are byte offsets. The iterator stops when no more</span>
 <span class="doccomment">/// matches can be found.</span>
 <span class="doccomment">///</span>
 <span class="doccomment">/// `&#39;r` is the lifetime of the compiled regular expression and `&#39;t` is the</span>
 <span class="doccomment">/// lifetime of the matched string.</span>
 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">FindMatches</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>(<span class="ident">FindMatchesInner</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span>);

 <span class="kw">enum</span> <span class="ident">FindMatchesInner</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="ident">Dynamic</span>(<span class="ident">re_trait</span>::<span class="ident">FindMatches</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span>, <span class="ident">ExecNoSyncStr</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span><span class="op">&gt;&gt;</span>),
     <span class="ident">Plugin</span>(<span class="ident">re_trait</span>::<span class="ident">FindMatches</span><span class="op">&lt;</span><span class="lifetime">&#39;t</span>, <span class="ident">Plugin</span><span class="op">&gt;</span>),
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">FindMatches</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">fn</span> <span class="ident">text</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;t</span> <span class="ident">str</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">FindMatchesInner</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="ident">it</span>) <span class="op">=&gt;</span> <span class="ident">it</span>.<span class="ident">text</span>(),
             <span class="ident">FindMatchesInner</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="ident">it</span>) <span class="op">=&gt;</span> <span class="ident">it</span>.<span class="ident">text</span>(),
         }
     }
 }

 <span class="kw">impl</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">FindMatches</span><span class="op">&lt;</span><span class="lifetime">&#39;r</span>, <span class="lifetime">&#39;t</span><span class="op">&gt;</span> {
     <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="ident">usize</span>, <span class="ident">usize</span>);

     <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">usize</span>, <span class="ident">usize</span>)<span class="op">&gt;</span> {
         <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
             <span class="ident">FindMatchesInner</span>::<span class="ident">Dynamic</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">it</span>) <span class="op">=&gt;</span> <span class="ident">it</span>.<span class="ident">next</span>(),
             <span class="ident">FindMatchesInner</span>::<span class="ident">Plugin</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">it</span>) <span class="op">=&gt;</span> <span class="ident">it</span>.<span class="ident">next</span>(),
         }
     }
 }
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