<!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="API documentation for the Rust `RegexBuilder` struct in crate `regex`.">
<meta name="keywords" content="rust, rustlang, rust-lang, RegexBuilder">
<title>regex::RegexBuilder - Rust</title>
<link rel="stylesheet" type="text/css" href="../rustdoc.css">
<link rel="stylesheet" type="text/css" href="../main.css">
</head>
<body class="rustdoc">
<nav class="sidebar">
<p class='location'><a href='index.html'>regex</a></p><script>window.sidebarCurrent = {name: 'RegexBuilder', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script>
</nav>
<nav class="sub">
<form class="search-form js-only">
<div class="search-container">
<input class="search-input" name="search"
autocomplete="off"
placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
type="search">
</div>
</form>
</nav>
<section id='main' class="content struct">
<h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>regex</a>::<wbr><a class='struct' href=''>RegexBuilder</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>−</span>]
</a>
</span><a class='srclink' href='../src/regex/re_builder.rs.html#56' title='goto source code'>[src]</a></span></h1>
<pre class='rust struct'>pub struct RegexBuilder(_);</pre><div class='docblock'><p>A configurable builder for a regular expression.</p>
<p>A builder can be used to configure how the regex is built, for example, by
setting the default flags (which can be overridden in the expression
itself) or setting various limits.</p>
</div><h2 id='methods'>Methods</h2><h3 class='impl'><span class='in-band'><code>impl <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/regex/re_builder.rs.html#58-146' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.new' class='method'><span id='new.v' class='invisible'><code>fn <a href='#method.new' class='fnname'>new</a>(pattern: &<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.str.html'>str</a>) -> <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Create a new regular expression builder with the given pattern.</p>
<p>If the pattern is invalid, then an error will be returned when
<code>compile</code> is called.</p>
</div><h4 id='method.build' class='method'><span id='build.v' class='invisible'><code>fn <a href='#method.build' class='fnname'>build</a>(&self) -> <a class='enum' href='https://doc.rust-lang.org/nightly/core/result/enum.Result.html' title='core::result::Result'>Result</a><<a class='struct' href='../regex/struct.Regex.html' title='regex::Regex'>Regex</a>, <a class='enum' href='../regex/enum.Error.html' title='regex::Error'>Error</a>></code></span></h4>
<div class='docblock'><p>Consume the builder and compile the regular expression.</p>
<p>Note that calling <code>as_str</code> on the resulting <code>Regex</code> will produce the
pattern given to <code>new</code> verbatim. Notably, it will not incorporate any
of the flags set on this builder.</p>
</div><h4 id='method.case_insensitive' class='method'><span id='case_insensitive.v' class='invisible'><code>fn <a href='#method.case_insensitive' class='fnname'>case_insensitive</a>(&mut self, yes: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the value for the case insensitive (<code>i</code>) flag.</p>
</div><h4 id='method.multi_line' class='method'><span id='multi_line.v' class='invisible'><code>fn <a href='#method.multi_line' class='fnname'>multi_line</a>(&mut self, yes: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the value for the multi-line matching (<code>m</code>) flag.</p>
</div><h4 id='method.dot_matches_new_line' class='method'><span id='dot_matches_new_line.v' class='invisible'><code>fn <a href='#method.dot_matches_new_line' class='fnname'>dot_matches_new_line</a>(&mut self, yes: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the value for the any character (<code>s</code>) flag, where in <code>.</code> matches
anything when <code>s</code> is set and matches anything except for new line when
it is not set (the default).</p>
<p>N.B. "matches anything" means "any byte" for <code>regex::bytes::Regex</code>
expressions and means "any Unicode scalar value" for <code>regex::Regex</code>
expressions.</p>
</div><h4 id='method.swap_greed' class='method'><span id='swap_greed.v' class='invisible'><code>fn <a href='#method.swap_greed' class='fnname'>swap_greed</a>(&mut self, yes: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the value for the greedy swap (<code>U</code>) flag.</p>
</div><h4 id='method.ignore_whitespace' class='method'><span id='ignore_whitespace.v' class='invisible'><code>fn <a href='#method.ignore_whitespace' class='fnname'>ignore_whitespace</a>(&mut self, yes: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the value for the ignore whitespace (<code>x</code>) flag.</p>
</div><h4 id='method.unicode' class='method'><span id='unicode.v' class='invisible'><code>fn <a href='#method.unicode' class='fnname'>unicode</a>(&mut self, yes: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the value for the Unicode (<code>u</code>) flag.</p>
</div><h4 id='method.size_limit' class='method'><span id='size_limit.v' class='invisible'><code>fn <a href='#method.size_limit' class='fnname'>size_limit</a>(&mut self, limit: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.usize.html'>usize</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the approximate size limit of the compiled regular expression.</p>
<p>This roughly corresponds to the number of bytes occupied by a single
compiled program. If the program exceeds this number, then a
compilation error is returned.</p>
</div><h4 id='method.dfa_size_limit' class='method'><span id='dfa_size_limit.v' class='invisible'><code>fn <a href='#method.dfa_size_limit' class='fnname'>dfa_size_limit</a>(&mut self, limit: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.usize.html'>usize</a>) -> &mut <a class='struct' href='../regex/struct.RegexBuilder.html' title='regex::RegexBuilder'>RegexBuilder</a></code></span></h4>
<div class='docblock'><p>Set the approximate size of the cache used by the DFA.</p>
<p>This roughly corresponds to the number of bytes that the DFA will
use while searching.</p>
<p>Note that this is a <em>per thread</em> limit. There is no way to set a global
limit. In particular, if a regex is used from multiple threads
simulanteously, then each thread may use up to the number of bytes
specified here.</p>
</div></div></section>
<section id='search' class="content hidden"></section>
<section class="footer"></section>
<aside id="help" class="hidden">
<div>
<h1 class="hidden">Help</h1>
<div class="shortcuts">
<h2>Keyboard Shortcuts</h2>
<dl>
<dt>?</dt>
<dd>Show this help dialog</dd>
<dt>S</dt>
<dd>Focus the search field</dd>
<dt>⇤</dt>
<dd>Move up in search results</dd>
<dt>⇥</dt>
<dd>Move down in search results</dd>
<dt>⏎</dt>
<dd>Go to active search result</dd>
<dt>+</dt>
<dd>Collapse/expand all sections</dd>
</dl>
</div>
<div class="infos">
<h2>Search Tricks</h2>
<p>
Prefix searches with a type followed by a colon (e.g.
<code>fn:</code>) to restrict the search to a given type.
</p>
<p>
Accepted types are: <code>fn</code>, <code>mod</code>,
<code>struct</code>, <code>enum</code>,
<code>trait</code>, <code>type</code>, <code>macro</code>,
and <code>const</code>.
</p>
<p>
Search functions by type signature (e.g.
<code>vec -> usize</code> or <code>* -> vec</code>)
</p>
</div>
</div>
</aside>
<script>
window.rootPath = "../";
window.currentCrate = "regex";
</script>
<script src="../jquery.js"></script>
<script src="../main.js"></script>
<script defer src="../search-index.js"></script>
</body>
</html>