<!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 `/Users/syrusakbary/.cargo/registry/src/github.com-1ecc6299db9ec823/regex-1.2.1/src/error.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>error.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> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span id="21">21</span> <span id="22">22</span> <span id="23">23</span> <span id="24">24</span> <span id="25">25</span> <span id="26">26</span> <span id="27">27</span> <span id="28">28</span> <span id="29">29</span> <span id="30">30</span> <span id="31">31</span> <span id="32">32</span> <span id="33">33</span> <span id="34">34</span> <span id="35">35</span> <span id="36">36</span> <span id="37">37</span> <span id="38">38</span> <span id="39">39</span> <span id="40">40</span> <span id="41">41</span> <span id="42">42</span> <span id="43">43</span> <span id="44">44</span> <span id="45">45</span> <span id="46">46</span> <span id="47">47</span> <span id="48">48</span> <span id="49">49</span> <span id="50">50</span> <span id="51">51</span> <span id="52">52</span> <span id="53">53</span> <span id="54">54</span> <span id="55">55</span> <span id="56">56</span> <span id="57">57</span> <span id="58">58</span> <span id="59">59</span> <span id="60">60</span> <span id="61">61</span> <span id="62">62</span> <span id="63">63</span> <span id="64">64</span> <span id="65">65</span> <span id="66">66</span> <span id="67">67</span> <span id="68">68</span> <span id="69">69</span> </pre><div class="example-wrap"><pre class="rust "> <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="ident">repeat</span>; <span class="doccomment">/// An error that occurred during parsing or compiling a regular expression.</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>)]</span> <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Error</span> { <span class="doccomment">/// A syntax error.</span> <span class="ident">Syntax</span>(<span class="ident">String</span>), <span class="doccomment">/// The compiled program exceeded the set size limit.</span> <span class="doccomment">/// The argument is the size limit imposed.</span> <span class="ident">CompiledTooBig</span>(<span class="ident">usize</span>), <span class="doccomment">/// Hints that destructuring should not be exhaustive.</span> <span class="doccomment">///</span> <span class="doccomment">/// This enum may grow additional variants, so this makes sure clients</span> <span class="doccomment">/// don't count on exhaustive matching. (Otherwise, adding a new variant</span> <span class="doccomment">/// could break existing code.)</span> <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> <span class="ident">__Nonexhaustive</span>, } <span class="kw">impl</span> ::<span class="ident">std</span>::<span class="ident">error</span>::<span class="ident">Error</span> <span class="kw">for</span> <span class="ident">Error</span> { <span class="kw">fn</span> <span class="ident">description</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">str</span> { <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> { <span class="ident">Error</span>::<span class="ident">Syntax</span>(<span class="kw-2">ref</span> <span class="ident">err</span>) <span class="op">=</span><span class="op">></span> <span class="ident">err</span>, <span class="ident">Error</span>::<span class="ident">CompiledTooBig</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="string">"compiled program too big"</span>, <span class="ident">Error</span>::<span class="ident">__Nonexhaustive</span> <span class="op">=</span><span class="op">></span> <span class="macro">unreachable</span><span class="macro">!</span>(), } } } <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Error</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="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> { <span class="ident">Error</span>::<span class="ident">Syntax</span>(<span class="kw-2">ref</span> <span class="ident">err</span>) <span class="op">=</span><span class="op">></span> <span class="ident">err</span>.<span class="ident">fmt</span>(<span class="ident">f</span>), <span class="ident">Error</span>::<span class="ident">CompiledTooBig</span>(<span class="ident">limit</span>) <span class="op">=</span><span class="op">></span> <span class="macro">write</span><span class="macro">!</span>( <span class="ident">f</span>, <span class="string">"Compiled regex exceeds size limit of {} bytes."</span>, <span class="ident">limit</span> ), <span class="ident">Error</span>::<span class="ident">__Nonexhaustive</span> <span class="op">=</span><span class="op">></span> <span class="macro">unreachable</span><span class="macro">!</span>(), } } } <span class="comment">// We implement our own Debug implementation so that we show nicer syntax</span> <span class="comment">// errors when people use `Regex::new(...).unwrap()`. It's a little weird,</span> <span class="comment">// but the `Syntax` variant is already storing a `String` anyway, so we might</span> <span class="comment">// as well format it nicely.</span> <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Error</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="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> { <span class="ident">Error</span>::<span class="ident">Syntax</span>(<span class="kw-2">ref</span> <span class="ident">err</span>) <span class="op">=</span><span class="op">></span> { <span class="kw">let</span> <span class="ident">hr</span>: <span class="ident">String</span> <span class="op">=</span> <span class="ident">repeat</span>(<span class="string">'~'</span>).<span class="ident">take</span>(<span class="number">79</span>).<span class="ident">collect</span>(); <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Syntax("</span>)<span class="question-mark">?</span>; <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}"</span>, <span class="ident">hr</span>)<span class="question-mark">?</span>; <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}"</span>, <span class="ident">err</span>)<span class="question-mark">?</span>; <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}"</span>, <span class="ident">hr</span>)<span class="question-mark">?</span>; <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">")"</span>)<span class="question-mark">?</span>; <span class="prelude-val">Ok</span>(()) } <span class="ident">Error</span>::<span class="ident">CompiledTooBig</span>(<span class="ident">limit</span>) <span class="op">=</span><span class="op">></span> { <span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">"CompiledTooBig"</span>).<span class="ident">field</span>(<span class="kw-2">&</span><span class="ident">limit</span>).<span class="ident">finish</span>() } <span class="ident">Error</span>::<span class="ident">__Nonexhaustive</span> <span class="op">=</span><span class="op">></span> { <span class="ident">f</span>.<span class="ident">debug_tuple</span>(<span class="string">"__Nonexhaustive"</span>).<span class="ident">finish</span>() } } } } </pre></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><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse 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><p>Search multiple things at once by splitting your query with comma (e.g., <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../";window.currentCrate = "regex";</script><script src="../../aliases.js"></script><script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script><script defer src="../../search-index.js"></script></body></html>