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<section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class='rust '>
<span class='doccomment'>//! A stand-in for `std::error`</span>
<span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>fmt</span>::{<span class='ident'>Debug</span>, <span class='ident'>Display</span>};
<span class='doccomment'>/// A stand-in for `std::error::Error`, which requires no allocation.</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Error</span>: <span class='ident'>Debug</span> <span class='op'>+</span> <span class='ident'>Display</span> {
<span class='doccomment'>/// A short description of the error.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The description should not contain newlines or sentence-ending</span>
<span class='doccomment'>/// punctuation, to facilitate embedding in larger user-facing</span>
<span class='doccomment'>/// strings.</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='doccomment'>/// The lower-level cause of this error, if any.</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'>Error</span><span class='op'>></span> {
<span class='prelude-val'>None</span>
}
}
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