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<!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 of the Rust file `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/uuid-1.1.2/src/error.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>error.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" href="https://www.rust-lang.org/favicon.ico"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../uuid/index.html"><div class="logo-container"><img src="https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png" alt="logo"></div>
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</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::std::fmt</span>;
<span class="doccomment">/// A general error that can occur when working with UUIDs.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Error</span>(<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="ident">ErrorKind</span>);
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">ErrorKind</span> {
<span class="doccomment">/// Invalid character in the [`Uuid`] string.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Uuid`]: ../struct.Uuid.html</span>
<span class="ident">Char</span> { <span class="ident">character</span>: <span class="ident">char</span>, <span class="ident">index</span>: <span class="ident">usize</span> },
<span class="doccomment">/// A simple [`Uuid`] didn't contain 32 characters.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Uuid`]: ../struct.Uuid.html</span>
<span class="ident">SimpleLength</span> { <span class="ident">len</span>: <span class="ident">usize</span> },
<span class="doccomment">/// A byte array didn't contain 16 bytes</span>
<span class="ident">ByteLength</span> { <span class="ident">len</span>: <span class="ident">usize</span> },
<span class="doccomment">/// A hyphenated [`Uuid`] didn't contain 5 groups</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Uuid`]: ../struct.Uuid.html</span>
<span class="ident">GroupCount</span> { <span class="ident">count</span>: <span class="ident">usize</span> },
<span class="doccomment">/// A hyphenated [`Uuid`] had a group that wasn't the right length</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Uuid`]: ../struct.Uuid.html</span>
<span class="ident">GroupLength</span> {
<span class="ident">group</span>: <span class="ident">usize</span>,
<span class="ident">len</span>: <span class="ident">usize</span>,
<span class="ident">index</span>: <span class="ident">usize</span>,
},
<span class="doccomment">/// The input was not a valid UTF8 string</span>
<span class="ident">InvalidUTF8</span>,
<span class="doccomment">/// Some other error occurred.</span>
<span class="ident">Other</span>,
}
<span class="doccomment">/// A string that is guaranteed to fail to parse to a [`Uuid`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This type acts as a lightweight error indicator, suggesting</span>
<span class="doccomment">/// that the string cannot be parsed but offering no error</span>
<span class="doccomment">/// details. To get details, use `InvalidUuid::into_err`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Uuid`]: ../struct.Uuid.html</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">InvalidUuid</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">u8</span>]);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">InvalidUuid</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="doccomment">/// Converts the lightweight error type into detailed diagnostics.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_err</span>(<span class="self">self</span>) -> <span class="ident">Error</span> {
<span class="comment">// Check whether or not the input was ever actually a valid UTF8 string</span>
<span class="kw">let</span> <span class="ident">input_str</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">std::str::from_utf8</span>(<span class="self">self</span>.<span class="number">0</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">s</span>) => <span class="ident">s</span>,
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">ErrorKind::InvalidUTF8</span>),
};
<span class="kw">let</span> (<span class="ident">uuid_str</span>, <span class="ident">offset</span>, <span class="ident">simple</span>) <span class="op">=</span> <span class="kw">match</span> <span class="ident">input_str</span>.<span class="ident">as_bytes</span>() {
[<span class="string">b'{'</span>, <span class="ident">s</span> @ .., <span class="string">b'}'</span>] => (<span class="ident">s</span>, <span class="number">1</span>, <span class="bool-val">false</span>),
[<span class="string">b'u'</span>, <span class="string">b'r'</span>, <span class="string">b'n'</span>, <span class="string">b':'</span>, <span class="string">b'u'</span>, <span class="string">b'u'</span>, <span class="string">b'i'</span>, <span class="string">b'd'</span>, <span class="string">b':'</span>, <span class="ident">s</span> @ ..] => {
(<span class="ident">s</span>, <span class="string">"urn:uuid:"</span>.<span class="ident">len</span>(), <span class="bool-val">false</span>)
}
<span class="ident">s</span> => (<span class="ident">s</span>, <span class="number">0</span>, <span class="bool-val">true</span>),
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hyphen_count</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">group_bounds</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">4</span>];
<span class="comment">// SAFETY: the byte array came from a valid utf8 string,</span>
<span class="comment">// and is aligned along char boundaries.</span>
<span class="kw">let</span> <span class="ident">uuid_str</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">std::str::from_utf8_unchecked</span>(<span class="ident">uuid_str</span>) };
<span class="kw">for</span> (<span class="ident">index</span>, <span class="ident">character</span>) <span class="kw">in</span> <span class="ident">uuid_str</span>.<span class="ident">char_indices</span>() {
<span class="kw">let</span> <span class="ident">byte</span> <span class="op">=</span> <span class="ident">character</span> <span class="kw">as</span> <span class="ident">u8</span>;
<span class="kw">if</span> <span class="ident">character</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op">-</span> <span class="ident">byte</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op">></span> <span class="number">0</span> {
<span class="comment">// Multibyte char</span>
<span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">ErrorKind::Char</span> {
<span class="ident">character</span>,
<span class="ident">index</span>: <span class="ident">index</span> <span class="op">+</span> <span class="ident">offset</span> <span class="op">+</span> <span class="number">1</span>,
});
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">byte</span> <span class="op">==</span> <span class="string">b'-'</span> {
<span class="comment">// While we search, also count group breaks</span>
<span class="kw">if</span> <span class="ident">hyphen_count</span> <span class="op"><</span> <span class="number">4</span> {
<span class="ident">group_bounds</span>[<span class="ident">hyphen_count</span>] <span class="op">=</span> <span class="ident">index</span>;
}
<span class="ident">hyphen_count</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
} <span class="kw">else</span> <span class="kw">if</span> <span class="op">!</span><span class="macro">matches!</span>(<span class="ident">byte</span>, <span class="string">b'0'</span>..<span class="op">=</span><span class="string">b'9'</span> <span class="op">|</span> <span class="string">b'a'</span>..<span class="op">=</span><span class="string">b'f'</span> <span class="op">|</span> <span class="string">b'A'</span>..<span class="op">=</span><span class="string">b'F'</span>) {
<span class="comment">// Non-hex char</span>
<span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">ErrorKind::Char</span> {
<span class="ident">character</span>: <span class="ident">byte</span> <span class="kw">as</span> <span class="ident">char</span>,
<span class="ident">index</span>: <span class="ident">index</span> <span class="op">+</span> <span class="ident">offset</span> <span class="op">+</span> <span class="number">1</span>,
});
}
}
<span class="kw">if</span> <span class="ident">hyphen_count</span> <span class="op">==</span> <span class="number">0</span> <span class="op">&&</span> <span class="ident">simple</span> {
<span class="comment">// This means that we tried and failed to parse a simple uuid.</span>
<span class="comment">// Since we verified that all the characters are valid, this means</span>
<span class="comment">// that it MUST have an invalid length.</span>
<span class="ident">Error</span>(<span class="ident">ErrorKind::SimpleLength</span> {
<span class="ident">len</span>: <span class="ident">input_str</span>.<span class="ident">len</span>(),
})
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">hyphen_count</span> <span class="op">!</span><span class="op">=</span> <span class="number">4</span> {
<span class="comment">// We tried to parse a hyphenated variant, but there weren't</span>
<span class="comment">// 5 groups (4 hyphen splits).</span>
<span class="ident">Error</span>(<span class="ident">ErrorKind::GroupCount</span> {
<span class="ident">count</span>: <span class="ident">hyphen_count</span> <span class="op">+</span> <span class="number">1</span>,
})
} <span class="kw">else</span> {
<span class="comment">// There are 5 groups, one of them has an incorrect length</span>
<span class="kw">const</span> <span class="ident">BLOCK_STARTS</span>: [<span class="ident">usize</span>; <span class="number">5</span>] <span class="op">=</span> [<span class="number">0</span>, <span class="number">9</span>, <span class="number">14</span>, <span class="number">19</span>, <span class="number">24</span>];
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="number">4</span> {
<span class="kw">if</span> <span class="ident">group_bounds</span>[<span class="ident">i</span>] <span class="op">!</span><span class="op">=</span> <span class="ident">BLOCK_STARTS</span>[<span class="ident">i</span> <span class="op">+</span> <span class="number">1</span>] <span class="op">-</span> <span class="number">1</span> {
<span class="kw">return</span> <span class="ident">Error</span>(<span class="ident">ErrorKind::GroupLength</span> {
<span class="ident">group</span>: <span class="ident">i</span>,
<span class="ident">len</span>: <span class="ident">group_bounds</span>[<span class="ident">i</span>] <span class="op">-</span> <span class="ident">BLOCK_STARTS</span>[<span class="ident">i</span>],
<span class="ident">index</span>: <span class="ident">offset</span> <span class="op">+</span> <span class="ident">BLOCK_STARTS</span>[<span class="ident">i</span>] <span class="op">+</span> <span class="number">1</span>,
});
}
}
<span class="comment">// The last group must be too long</span>
<span class="ident">Error</span>(<span class="ident">ErrorKind::GroupLength</span> {
<span class="ident">group</span>: <span class="number">4</span>,
<span class="ident">len</span>: <span class="ident">input_str</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">BLOCK_STARTS</span>[<span class="number">4</span>],
<span class="ident">index</span>: <span class="ident">offset</span> <span class="op">+</span> <span class="ident">BLOCK_STARTS</span>[<span class="number">4</span>] <span class="op">+</span> <span class="number">1</span>,
})
}
}
}
<span class="comment">// NOTE: This impl is part of the public API. Breaking changes to it should be carefully considered</span>
<span class="kw">impl</span> <span class="ident">fmt::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">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> {
<span class="ident">ErrorKind::Char</span> {
<span class="ident">character</span>, <span class="ident">index</span>, ..
} => {
<span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"invalid character: expected an optional prefix of `urn:uuid:` followed by [0-9a-zA-Z], found `{}` at {}"</span>, <span class="ident">character</span>, <span class="ident">index</span>)
}
<span class="ident">ErrorKind::SimpleLength</span> { <span class="ident">len</span> } => {
<span class="macro">write!</span>(
<span class="ident">f</span>,
<span class="string">"invalid length: expected length 32 for simple format, found {}"</span>,
<span class="ident">len</span>
)
}
<span class="ident">ErrorKind::ByteLength</span> { <span class="ident">len</span> } => {
<span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"invalid length: expected 16 bytes, found {}"</span>, <span class="ident">len</span>)
}
<span class="ident">ErrorKind::GroupCount</span> { <span class="ident">count</span> } => {
<span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"invalid group count: expected 5, found {}"</span>, <span class="ident">count</span>)
}
<span class="ident">ErrorKind::GroupLength</span> { <span class="ident">group</span>, <span class="ident">len</span>, .. } => {
<span class="kw">let</span> <span class="ident">expected</span> <span class="op">=</span> [<span class="number">8</span>, <span class="number">4</span>, <span class="number">4</span>, <span class="number">4</span>, <span class="number">12</span>][<span class="ident">group</span>];
<span class="macro">write!</span>(
<span class="ident">f</span>,
<span class="string">"invalid group length in group {}: expected {}, found {}"</span>,
<span class="ident">group</span>, <span class="ident">expected</span>, <span class="ident">len</span>
)
}
<span class="ident">ErrorKind::InvalidUTF8</span> => <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"non-UTF8 input"</span>),
<span class="ident">ErrorKind::Other</span> => <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"failed to parse a UUID"</span>),
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std"</span>)]</span>
<span class="kw">mod</span> <span class="ident">std_support</span> {
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::std::error</span>;
<span class="kw">impl</span> <span class="ident">error::Error</span> <span class="kw">for</span> <span class="ident">Error</span> {}
}
</code></pre></div>
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