<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `/home/nicholas/.cargo/registry/src/github.com-1ecc6299db9ec823/regex-1.2.1/src/re_set.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>re_set.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../regex/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><div class="example-wrap"><pre class="rust ">
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">define_set</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">builder_mod</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">text_ty</span>:<span class="ident">ty</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">as_bytes</span>:<span class="ident">expr</span>,
$(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc_regexset_example</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span> ) <span class="op">=</span><span class="op">></span> {
<span class="kw">pub</span> <span class="kw">mod</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">slice</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">vec</span>;
<span class="kw">use</span> <span class="ident">error</span>::<span class="ident">Error</span>;
<span class="kw">use</span> <span class="ident">exec</span>::<span class="ident">Exec</span>;
<span class="kw">use</span> <span class="ident">re_builder</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">builder_mod</span>::<span class="ident">RegexSetBuilder</span>;
<span class="kw">use</span> <span class="ident">re_trait</span>::<span class="ident">RegularExpression</span>;
<span class="doccomment">/// Match multiple (possibly overlapping) regular expressions in a single scan.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// A regex set corresponds to the union of two or more regular expressions.</span>
<span class="doccomment">/// That is, a regex set will match text where at least one of its</span>
<span class="doccomment">/// constituent regular expressions matches. A regex set as its formulated here</span>
<span class="doccomment">/// provides a touch more power: it will also report *which* regular</span>
<span class="doccomment">/// expressions in the set match. Indeed, this is the key difference between</span>
<span class="doccomment">/// regex sets and a single `Regex` with many alternates, since only one</span>
<span class="doccomment">/// alternate can match at a time.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// For example, consider regular expressions to match email addresses and</span>
<span class="doccomment">/// domains: `[a-z]+@[a-z]+\.(com|org|net)` and `[a-z]+\.(com|org|net)`. If a</span>
<span class="doccomment">/// regex set is constructed from those regexes, then searching the text</span>
<span class="doccomment">/// `foo@example.com` will report both regexes as matching. Of course, one</span>
<span class="doccomment">/// could accomplish this by compiling each regex on its own and doing two</span>
<span class="doccomment">/// searches over the text. The key advantage of using a regex set is that it</span>
<span class="doccomment">/// will report the matching regexes using a *single pass through the text*.</span>
<span class="doccomment">/// If one has hundreds or thousands of regexes to match repeatedly (like a URL</span>
<span class="doccomment">/// router for a complex web application or a user agent matcher), then a regex</span>
<span class="doccomment">/// set can realize huge performance gains.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This shows how the above two regexes (for matching email addresses and</span>
<span class="doccomment">/// domains) might work:</span>
<span class="doccomment">///</span>
$(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc_regexset_example</span>]</span>)<span class="op">*</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that it would be possible to adapt the above example to using `Regex`</span>
<span class="doccomment">/// with an expression like:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```ignore</span>
<span class="doccomment">/// (?P<email>[a-z]+@(?P<email_domain>[a-z]+[.](com|org|net)))|(?P<domain>[a-z]+[.](com|org|net))</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// After a match, one could then inspect the capture groups to figure out</span>
<span class="doccomment">/// which alternates matched. The problem is that it is hard to make this</span>
<span class="doccomment">/// approach scale when there are many regexes since the overlap between each</span>
<span class="doccomment">/// alternate isn't always obvious to reason about.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Limitations</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Regex sets are limited to answering the following two questions:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// 1. Does any regex in the set match?</span>
<span class="doccomment">/// 2. If so, which regexes in the set match?</span>
<span class="doccomment">///</span>
<span class="doccomment">/// As with the main `Regex` type, it is cheaper to ask (1) instead of (2)</span>
<span class="doccomment">/// since the matching engines can stop after the first match is found.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Other features like finding the location of successive matches or their</span>
<span class="doccomment">/// sub-captures aren't supported. If you need this functionality, the</span>
<span class="doccomment">/// recommended approach is to compile each regex in the set independently and</span>
<span class="doccomment">/// selectively match them based on which regexes in the set matched.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Performance</span>
<span class="doccomment">///</span>
<span class="doccomment">/// A `RegexSet` has the same performance characteristics as `Regex`. Namely,</span>
<span class="doccomment">/// search takes `O(mn)` time, where `m` is proportional to the size of the</span>
<span class="doccomment">/// regex set and `n` is proportional to the length of the search text.</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">RegexSet</span>(<span class="ident">Exec</span>);
<span class="kw">impl</span> <span class="ident">RegexSet</span> {
<span class="doccomment">/// Create a new regex set with the given regular expressions.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This takes an iterator of `S`, where `S` is something that can produce</span>
<span class="doccomment">/// a `&str`. If any of the strings in the iterator are not valid regular</span>
<span class="doccomment">/// expressions, then an error is returned.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Create a new regex set from an iterator of strings:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// # use regex::RegexSet;</span>
<span class="doccomment">/// let set = RegexSet::new(&[r"\w+", r"\d+"]).unwrap();</span>
<span class="doccomment">/// assert!(set.is_match("foo"));</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">S</span><span class="op">></span>(<span class="ident">exprs</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">RegexSet</span>, <span class="ident">Error</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">S</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">str</span><span class="op">></span>, <span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">S</span><span class="op">></span> {
<span class="ident">RegexSetBuilder</span>::<span class="ident">new</span>(<span class="ident">exprs</span>).<span class="ident">build</span>()
}
<span class="doccomment">/// Returns true if and only if one of the regexes in this set matches</span>
<span class="doccomment">/// the text given.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method should be preferred if you only need to test whether any</span>
<span class="doccomment">/// of the regexes in the set should match, but don't care about *which*</span>
<span class="doccomment">/// regexes matched. This is because the underlying matching engine will</span>
<span class="doccomment">/// quit immediately after seeing the first match instead of continuing to</span>
<span class="doccomment">/// find all matches.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that as with searches using `Regex`, the expression is unanchored</span>
<span class="doccomment">/// by default. That is, if the regex does not start with `^` or `\A`, or</span>
<span class="doccomment">/// end with `$` or `\z`, then it is permitted to match anywhere in the</span>
<span class="doccomment">/// text.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Tests whether a set matches some text:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// # use regex::RegexSet;</span>
<span class="doccomment">/// let set = RegexSet::new(&[r"\w+", r"\d+"]).unwrap();</span>
<span class="doccomment">/// assert!(set.is_match("foo"));</span>
<span class="doccomment">/// assert!(!set.is_match("☃"));</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_match</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">text</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">text_ty</span>) <span class="op">-</span><span class="op">></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">&</span><span class="self">self</span>, <span class="ident">text</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">text_ty</span>, <span class="ident">start</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">searcher</span>().<span class="ident">is_match_at</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">as_bytes</span>(<span class="ident">text</span>), <span class="ident">start</span>)
}
<span class="doccomment">/// Returns the set of regular expressions that match in the given text.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The set returned contains the index of each regular expression that</span>
<span class="doccomment">/// matches in the given text. The index is in correspondence with the</span>
<span class="doccomment">/// order of regular expressions given to `RegexSet`'s constructor.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The set can also be used to iterate over the matched indices.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that as with searches using `Regex`, the expression is unanchored</span>
<span class="doccomment">/// by default. That is, if the regex does not start with `^` or `\A`, or</span>
<span class="doccomment">/// end with `$` or `\z`, then it is permitted to match anywhere in the</span>
<span class="doccomment">/// text.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Tests which regular expressions match the given text:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// # use regex::RegexSet;</span>
<span class="doccomment">/// let set = RegexSet::new(&[</span>
<span class="doccomment">/// r"\w+",</span>
<span class="doccomment">/// r"\d+",</span>
<span class="doccomment">/// r"\pL+",</span>
<span class="doccomment">/// r"foo",</span>
<span class="doccomment">/// r"bar",</span>
<span class="doccomment">/// r"barfoo",</span>
<span class="doccomment">/// r"foobar",</span>
<span class="doccomment">/// ]).unwrap();</span>
<span class="doccomment">/// let matches: Vec<_> = set.matches("foobar").into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(matches, vec![0, 2, 3, 4, 6]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // You can also test whether a particular regex matched:</span>
<span class="doccomment">/// let matches = set.matches("foobar");</span>
<span class="doccomment">/// assert!(!matches.matched(5));</span>
<span class="doccomment">/// assert!(matches.matched(6));</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">matches</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">text</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">text_ty</span>) <span class="op">-</span><span class="op">></span> <span class="ident">SetMatches</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="bool-val">false</span>; <span class="self">self</span>.<span class="number">0</span>.<span class="ident">regex_strings</span>().<span class="ident">len</span>()];
<span class="kw">let</span> <span class="ident">any</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">read_matches_at</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">matches</span>, <span class="ident">text</span>, <span class="number">0</span>);
<span class="ident">SetMatches</span> {
<span class="ident">matched_any</span>: <span class="ident">any</span>,
<span class="ident">matches</span>: <span class="ident">matches</span>,
}
}
<span class="doccomment">/// Returns the same as matches, but starts the search at the given</span>
<span class="doccomment">/// offset and stores the matches into the slice 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="doccomment">///</span>
<span class="doccomment">/// `matches` must have a length that is at least the number of regexes</span>
<span class="doccomment">/// in this set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method returns true if and only if at least one member of</span>
<span class="doccomment">/// `matches` is true after executing the set against `text`.</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_matches_at</span>(
<span class="kw-2">&</span><span class="self">self</span>,
<span class="ident">matches</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">bool</span>],
<span class="ident">text</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">text_ty</span>,
<span class="ident">start</span>: <span class="ident">usize</span>,
) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">searcher</span>().<span class="ident">many_matches_at</span>(<span class="ident">matches</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">as_bytes</span>(<span class="ident">text</span>), <span class="ident">start</span>)
}
<span class="doccomment">/// Returns the total number of regular expressions in this set.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">regex_strings</span>().<span class="ident">len</span>()
}
<span class="doccomment">/// Returns the patterns that this set will match on.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This function can be used to determine the pattern for a match. The</span>
<span class="doccomment">/// slice returned has exactly as many patterns givens to this regex set,</span>
<span class="doccomment">/// and the order of the slice is the same as the order of the patterns</span>
<span class="doccomment">/// provided to the set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// # use regex::RegexSet;</span>
<span class="doccomment">/// let set = RegexSet::new(&[</span>
<span class="doccomment">/// r"\w+",</span>
<span class="doccomment">/// r"\d+",</span>
<span class="doccomment">/// r"\pL+",</span>
<span class="doccomment">/// r"foo",</span>
<span class="doccomment">/// r"bar",</span>
<span class="doccomment">/// r"barfoo",</span>
<span class="doccomment">/// r"foobar",</span>
<span class="doccomment">/// ]).unwrap();</span>
<span class="doccomment">/// let matches: Vec<_> = set</span>
<span class="doccomment">/// .matches("foobar")</span>
<span class="doccomment">/// .into_iter()</span>
<span class="doccomment">/// .map(|match_idx| &set.patterns()[match_idx])</span>
<span class="doccomment">/// .collect();</span>
<span class="doccomment">/// assert_eq!(matches, vec![r"\w+", r"\pL+", r"foo", r"bar", r"foobar"]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">patterns</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span>[<span class="ident">String</span>] {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">regex_strings</span>()
}
}
<span class="doccomment">/// A set of matches returned by a regex set.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SetMatches</span> {
<span class="ident">matched_any</span>: <span class="ident">bool</span>,
<span class="ident">matches</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span>,
}
<span class="kw">impl</span> <span class="ident">SetMatches</span> {
<span class="doccomment">/// Whether this set contains any matches.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">matched_any</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">matched_any</span>
}
<span class="doccomment">/// Whether the regex at the given index matched.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The index for a regex is determined by its insertion order upon the</span>
<span class="doccomment">/// initial construction of a `RegexSet`, starting at `0`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `regex_index` is greater than or equal to `self.len()`.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">matched</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">regex_index</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">matches</span>[<span class="ident">regex_index</span>]
}
<span class="doccomment">/// The total number of regexes in the set that created these matches.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">matches</span>.<span class="ident">len</span>()
}
<span class="doccomment">/// Returns an iterator over indexes in the regex that matched.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This will always produces matches in ascending order of index, where</span>
<span class="doccomment">/// the index corresponds to the index of the regex that matched with</span>
<span class="doccomment">/// respect to its position when initially building the set.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">iter</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">SetMatchesIter</span> {
<span class="ident">SetMatchesIter</span>((<span class="kw-2">&</span><span class="kw-2">*</span><span class="self">self</span>.<span class="ident">matches</span>).<span class="ident">into_iter</span>().<span class="ident">enumerate</span>())
}
}
<span class="kw">impl</span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="ident">SetMatches</span> {
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">SetMatchesIntoIter</span>;
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">usize</span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span>::<span class="ident">IntoIter</span> {
<span class="ident">SetMatchesIntoIter</span>(<span class="self">self</span>.<span class="ident">matches</span>.<span class="ident">into_iter</span>().<span class="ident">enumerate</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">SetMatches</span> {
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">SetMatchesIter</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>;
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">usize</span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span>::<span class="ident">IntoIter</span> {
<span class="self">self</span>.<span class="ident">iter</span>()
}
}
<span class="doccomment">/// An owned iterator over the set of matches from a regex set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This will always produces matches in ascending order of index, where the</span>
<span class="doccomment">/// index corresponds to the index of the regex that matched with respect to</span>
<span class="doccomment">/// its position when initially building the set.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SetMatchesIntoIter</span>(<span class="ident">iter</span>::<span class="ident">Enumerate</span><span class="op"><</span><span class="ident">vec</span>::<span class="ident">IntoIter</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span><span class="op">></span>);
<span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SetMatchesIntoIter</span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">usize</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">next</span>() {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="bool-val">false</span>)) <span class="op">=</span><span class="op">></span> {}
<span class="prelude-val">Some</span>((<span class="ident">i</span>, <span class="bool-val">true</span>)) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">i</span>),
}
}
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">size_hint</span>()
}
}
<span class="kw">impl</span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">SetMatchesIntoIter</span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">next_back</span>() {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="bool-val">false</span>)) <span class="op">=</span><span class="op">></span> {}
<span class="prelude-val">Some</span>((<span class="ident">i</span>, <span class="bool-val">true</span>)) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">i</span>),
}
}
}
}
<span class="doccomment">/// A borrowed iterator over the set of matches from a regex set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The lifetime `'a` refers to the lifetime of a `SetMatches` value.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This will always produces matches in ascending order of index, where the</span>
<span class="doccomment">/// index corresponds to the index of the regex that matched with respect to</span>
<span class="doccomment">/// its position when initially building the set.</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">SetMatchesIter</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="ident">iter</span>::<span class="ident">Enumerate</span><span class="op"><</span><span class="ident">slice</span>::<span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">bool</span><span class="op">></span><span class="op">></span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SetMatchesIter</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">usize</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">next</span>() {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="kw-2">&</span><span class="bool-val">false</span>)) <span class="op">=</span><span class="op">></span> {}
<span class="prelude-val">Some</span>((<span class="ident">i</span>, <span class="kw-2">&</span><span class="bool-val">true</span>)) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">i</span>),
}
}
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">size_hint</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">SetMatchesIter</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
<span class="kw">loop</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">next_back</span>() {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="kw-2">&</span><span class="bool-val">false</span>)) <span class="op">=</span><span class="op">></span> {}
<span class="prelude-val">Some</span>((<span class="ident">i</span>, <span class="kw-2">&</span><span class="bool-val">true</span>)) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">i</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"><</span><span class="ident">Exec</span><span class="op">></span> <span class="kw">for</span> <span class="ident">RegexSet</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">exec</span>: <span class="ident">Exec</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="ident">RegexSet</span>(<span class="ident">exec</span>)
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">RegexSet</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">></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">"RegexSet({:?})"</span>, <span class="self">self</span>.<span class="number">0</span>.<span class="ident">regex_strings</span>())
}
}
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span> <span class="kw">fn</span> <span class="ident">as_bytes_str</span>(<span class="ident">text</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span>[<span class="ident">u8</span>] { <span class="ident">text</span>.<span class="ident">as_bytes</span>() }
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span> <span class="kw">fn</span> <span class="ident">as_bytes_bytes</span>(<span class="ident">text</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span>[<span class="ident">u8</span>] { <span class="ident">text</span> }
}
}
}
<span class="macro">define_set</span><span class="macro">!</span> {
<span class="ident">unicode</span>,
<span class="ident">set_unicode</span>,
<span class="kw-2">&</span><span class="ident">str</span>,
<span class="ident">as_bytes_str</span>,
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// # use regex::RegexSet;</span>
<span class="doccomment">/// let set = RegexSet::new(&[</span>
<span class="doccomment">/// r"[a-z]+@[a-z]+\.(com|org|net)",</span>
<span class="doccomment">/// r"[a-z]+\.(com|org|net)",</span>
<span class="doccomment">/// ]).unwrap();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Ask whether any regexes in the set match.</span>
<span class="doccomment">/// assert!(set.is_match("foo@example.com"));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Identify which regexes in the set match.</span>
<span class="doccomment">/// let matches: Vec<_> = set.matches("foo@example.com").into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(vec![0, 1], matches);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Try again, but with text that only matches one of the regexes.</span>
<span class="doccomment">/// let matches: Vec<_> = set.matches("example.com").into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(vec![1], matches);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Try again, but with text that doesn't match any regex in the set.</span>
<span class="doccomment">/// let matches: Vec<_> = set.matches("example").into_iter().collect();</span>
<span class="doccomment">/// assert!(matches.is_empty());</span>
<span class="doccomment">/// ```</span>
}
<span class="macro">define_set</span><span class="macro">!</span> {
<span class="ident">bytes</span>,
<span class="ident">set_bytes</span>,
<span class="kw-2">&</span>[<span class="ident">u8</span>],
<span class="ident">as_bytes_bytes</span>,
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// # use regex::bytes::RegexSet;</span>
<span class="doccomment">/// let set = RegexSet::new(&[</span>
<span class="doccomment">/// r"[a-z]+@[a-z]+\.(com|org|net)",</span>
<span class="doccomment">/// r"[a-z]+\.(com|org|net)",</span>
<span class="doccomment">/// ]).unwrap();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Ask whether any regexes in the set match.</span>
<span class="doccomment">/// assert!(set.is_match(b"foo@example.com"));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Identify which regexes in the set match.</span>
<span class="doccomment">/// let matches: Vec<_> = set.matches(b"foo@example.com").into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(vec![0, 1], matches);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Try again, but with text that only matches one of the regexes.</span>
<span class="doccomment">/// let matches: Vec<_> = set.matches(b"example.com").into_iter().collect();</span>
<span class="doccomment">/// assert_eq!(vec![1], matches);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Try again, but with text that doesn't match any regex in the set.</span>
<span class="doccomment">/// let matches: Vec<_> = set.matches(b"example").into_iter().collect();</span>
<span class="doccomment">/// assert!(matches.is_empty());</span>
<span class="doccomment">/// ```</span>
}
</pre></div>
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