<main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><divid="sidebar-button"tabindex="-1"><ahref="../../../regex_automata/all.html"title="show sidebar"></a></div><inputclass="search-input"name="search"aria-label="Run search in the documentation"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"tabindex="-1"><ahref="../../../help.html"title="help">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../../../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Struct <ahref="../../index.html">regex_automata</a>::<wbr><ahref="../index.html">hybrid</a>::<wbr><ahref="index.html">dfa</a>::<wbr><aclass="struct"href="#">Builder</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../../../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="src"href="../../../src/regex_automata/hybrid/dfa.rs.html#3974-3978">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code>pub struct Builder { <spanclass="comment">/* private fields */</span> }</code></pre><detailsclass="toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>A builder for constructing a lazy deterministic finite automaton from
regular expressions.</p>
<p>As a convenience, <ahref="struct.DFA.html#method.builder"title="associated function regex_automata::hybrid::dfa::DFA::builder"><code>DFA::builder</code></a> is an alias for <ahref="struct.Builder.html#method.new"title="associated function regex_automata::hybrid::dfa::Builder::new"><code>Builder::new</code></a>. The
advantage of the former is that it often lets you avoid importing the
<code>Builder</code> type directly.</p>
<p>This builder provides two main things:</p>
<ol>
<li>It provides a few different <code>build</code> routines for actually constructing
a DFA from different kinds of inputs. The most convenient is
<ahref="struct.Builder.html#method.build"title="method regex_automata::hybrid::dfa::Builder::build"><code>Builder::build</code></a>, which builds a DFA directly from a pattern string. The
most flexible is <ahref="struct.Builder.html#method.build_from_nfa"title="method regex_automata::hybrid::dfa::Builder::build_from_nfa"><code>Builder::build_from_nfa</code></a>, which builds a DFA straight
from an NFA.</li>
<li>The builder permits configuring a number of things.
<ahref="struct.Builder.html#method.configure"title="method regex_automata::hybrid::dfa::Builder::configure"><code>Builder::configure</code></a> is used with <ahref="struct.Config.html"title="struct regex_automata::hybrid::dfa::Config"><code>Config</code></a> to configure aspects of
the DFA and the construction process itself. <ahref="struct.Builder.html#method.syntax"title="method regex_automata::hybrid::dfa::Builder::syntax"><code>Builder::syntax</code></a> and
<ahref="struct.Builder.html#method.thompson"title="method regex_automata::hybrid::dfa::Builder::thompson"><code>Builder::thompson</code></a> permit configuring the regex parser and Thompson NFA
construction, respectively. The syntax and thompson configurations only
apply when building from a pattern string.</li>
</ol>
<p>This builder always constructs a <em>single</em> lazy DFA. As such, this builder
can only be used to construct regexes that either detect the presence
of a match or find the end location of a match. A single DFA cannot
produce both the start and end of a match. For that information, use a
<ahref="../regex/struct.Regex.html"title="struct regex_automata::hybrid::regex::Regex"><code>Regex</code></a>, which can be similarly configured
using <ahref="../regex/struct.Builder.html"title="struct regex_automata::hybrid::regex::Builder"><code>regex::Builder</code></a>. The main reason
to use a DFA directly is if the end location of a match is enough for your
use case. Namely, a <code>Regex</code> will construct two lazy DFAs instead of one,
since a second reverse DFA is needed to find the start of a match.</p>
</div></details><h2id="implementations"class="section-header">Implementations<ahref="#implementations"class="anchor">§</a></h2><divid="implementations-list"><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Builder"class="impl"><aclass="src rightside"href="../../../src/regex_automata/hybrid/dfa.rs.html#3980-4153">source</a><ahref="#impl-Builder"class="anchor">§</a><h3class="code-header">impl <aclass="struct"href="struct.Builder.html"title="struct regex_automata::hybrid::dfa::Builder">Builder</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.new"class="method"><aclass="src rightside"href="../../../src/regex_automata/hybrid/dfa.rs.html#3982-3988">source</a><h4class="code-header">pub fn <ahref="#method.new"class="fn">new</a>() -><aclass="struct"href="struct.Builder.html"title="struct regex_automata::hybrid::dfa::Builder">Builder</a></h4></section></summary><divclass="docblock"><p>Create a new lazy DFA builder with the default configuration.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.build"class="method"><aclass="src rightside"href="../../../src/regex_automata/hybrid/dfa.rs.html#3995-3997">source</a><h4class="code-header">pub fn <ahref="#method.build"class="fn">build</a>(&self, pattern: &<aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.str.html">str</a>) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="struct"href="struct.DFA.html"title="struct regex_automata::hybrid::dfa::DFA">DFA</a>, <aclass="struct"href="../struct.BuildError.html"title="struct regex_automata::hybrid::BuildError">BuildError</a>></h4></section></summary><divclass="docblock"><p>Build a lazy DFA from the given pattern.</p>
<p>If there was a problem parsing or compiling the pattern, then an error
) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="struct"href="struct.DFA.html"title="struct regex_automata::hybrid::dfa::DFA">DFA</a>, <aclass="struct"href="../struct.BuildError.html"title="struct regex_automata::hybrid::BuildError">BuildError</a>></h4></section></summary><divclass="docblock"><p>Build a lazy DFA from the given patterns.</p>
<p>When matches are returned, the pattern ID corresponds to the index of
the pattern in the slice given.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.build_from_nfa"class="method"><aclass="src rightside"href="../../../src/regex_automata/hybrid/dfa.rs.html#4055-4114">source</a><h4class="code-header">pub fn <ahref="#method.build_from_nfa"class="fn">build_from_nfa</a>(&self, nfa: <aclass="struct"href="../../nfa/thompson/struct.NFA.html"title="struct regex_automata::nfa::thompson::NFA">NFA</a>) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="struct"href="struct.DFA.html"title="struct regex_automata::hybrid::dfa::DFA">DFA</a>, <aclass="struct"href="../struct.BuildError.html"title="struct regex_automata::hybrid::BuildError">BuildError</a>></h4></section></summary><divclass="docblock"><p>Build a DFA from the given NFA.</p>
<p>Note that this requires owning a <code>thompson::NFA</code>. While this may force
you to clone the NFA, such a clone is not a deep clone. Namely, NFAs
are defined internally to support shared ownership such that cloning is
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.configure"class="method"><aclass="src rightside"href="../../../src/regex_automata/hybrid/dfa.rs.html#4117-4120">source</a><h4class="code-header">pub fn <ahref="#method.configure"class="fn">configure</a>(&mut self, config: <aclass="struct"href="struct.Config.html"title="struct regex_automata::hybrid::dfa::Config">Config</a>) ->&mut <aclass="struct"href="struct.Builder.html"title="struct regex_automata::hybrid::dfa::Builder">Builder</a></h4></section></summary><divclass="docblock"><p>Apply the given lazy DFA configuration options to this builder.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.syntax"class="method"><aclass="src rightside"href="../../../src/regex_automata/hybrid/dfa.rs.html#4131-4137">source</a><h4class="code-header">pub fn <ahref="#method.syntax"class="fn">syntax</a>(&mut self, config: <aclass="struct"href="../../util/syntax/struct.Config.html"title="struct regex_automata::util::syntax::Config">Config</a>) ->&mut <aclass="struct"href="struct.Builder.html"title="struct regex_automata::hybrid::dfa::Builder">Builder</a></h4></section></summary><divclass="docblock"><p>Set the syntax configuration for this builder using
<p>This permits setting things like case insensitivity, Unicode and multi
line mode.</p>
<p>These settings only apply when constructing a lazy DFA directly from a
pattern.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.thompson"class="method"><aclass="src rightside"href="../../../src/regex_automata/hybrid/dfa.rs.html#4149-4152">source</a><h4class="code-header">pub fn <ahref="#method.thompson"class="fn">thompson</a>(&mut self, config: <aclass="struct"href="../../nfa/thompson/struct.Config.html"title="struct regex_automata::nfa::thompson::Config">Config</a>) ->&mut <aclass="struct"href="struct.Builder.html"title="struct regex_automata::hybrid::dfa::Builder">Builder</a></h4></section></summary><divclass="docblock"><p>Set the Thompson NFA configuration for this builder using
<p>That is, this conversion is whatever the implementation of
<code><ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.From.html"title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-ToOwned-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#83-85">source</a><ahref="#impl-ToOwned-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html"title="trait alloc::borrow::ToOwned">ToOwned</a> for T<divclass="where">where
T: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Owned"class="associatedtype trait-impl"><ahref="#associatedtype.Owned"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned"class="associatedtype">Owned</a> = T</h4></section></summary><divclass='docblock'>The resulting type after obtaining ownership.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.to_owned"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#88">source</a><ahref="#method.to_owned"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned"class="fn">to_owned</a>(&self) -> T</h4></section></summary><divclass='docblock'>Creates owned data from borrowed data, usually by cloning. <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.clone_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/alloc/borrow.rs.html#92">source</a><ahref="#method.clone_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into"class="fn">clone_into</a>(&self, target: <aclass="primitive"href="https://doc.rust-lang.org/1.76.0/std/primitive.reference.html">&mut T</a>)</h4></section></summary><divclass='docblock'>Uses borrowed data to replace owned data, usually by cloning. <ahref="https://doc.rust-lang.org/1.76.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#803-805">source</a><ahref="#impl-TryFrom%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl"><ahref="#associatedtype.Error"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_from"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#810">source</a><ahref="#method.try_from"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#tymethod.try_from"class="fn">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#788-790">source</a><ahref="#impl-TryInto%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error-1"class="associatedtype trait-impl"><ahref="#associatedtype.Error-1"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.76.0/src/core/convert/mod.rs.html#795">source</a><ahref="#method.try_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryInto.html#tymethod.try_into"class="fn">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/1.76.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.76.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
