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| <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> |
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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 <LICENSE-APACHE or</span> |
| <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> |
| <span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, 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">fmt</span>; |
| |
| <span class="kw">use</span> <span class="ident">syntax</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">Debug</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">syntax</span>::<span class="ident">Error</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">/// **DEPRECATED:** Will be removed on next major version bump.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This error is no longer used. (A `RegexSet` can now contain zero or</span> |
| <span class="doccomment">/// more regular expressions.)</span> |
| <span class="ident">InvalidSet</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="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="ident">err</span>.<span class="ident">description</span>(), |
| <span class="ident">Error</span>::<span class="ident">CompiledTooBig</span>(_) <span class="op">=></span> <span class="string">"compiled program too big"</span>, |
| <span class="ident">Error</span>::<span class="ident">InvalidSet</span> <span class="op">=></span> { |
| <span class="string">"sets must contain 2 or more regular expressions"</span> |
| } |
| <span class="ident">Error</span>::<span class="ident">__Nonexhaustive</span> <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">cause</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>::<span class="ident">std</span>::<span class="ident">error</span>::<span class="ident">Error</span><span class="op">></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="prelude-val">Some</span>(<span class="ident">err</span>), |
| _ <span class="op">=></span> <span class="prelude-val">None</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="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="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="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">InvalidSet</span> <span class="op">=></span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Sets must contain 2 or more regular expressions."</span>) |
| } |
| <span class="ident">Error</span>::<span class="ident">__Nonexhaustive</span> <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">syntax</span>::<span class="ident">Error</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Error</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">syntax</span>::<span class="ident">Error</span>) <span class="op">-></span> <span class="ident">Error</span> { |
| <span class="ident">Error</span>::<span class="ident">Syntax</span>(<span class="ident">err</span>) |
| } |
| } |
| </pre> |
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