169 lines
9.2 KiB
HTML
169 lines
9.2 KiB
HTML
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<!DOCTYPE html>
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<meta name="description" content="API documentation for the Rust `Error` trait in crate `serde`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, Error">
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<title>serde::ser::Error - Rust</title>
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<div class="sidebar-menu">☰</div>
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<p class='location'>Trait Error</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.custom">custom</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>serde</a>::<wbr><a href='index.html'>ser</a></p><script>window.sidebarCurrent = {name: 'Error', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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autocomplete="off"
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placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
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type="search">
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>serde</a>::<wbr><a href='index.html'>ser</a>::<wbr><a class="trait" href=''>Error</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../../src/serde/ser/mod.rs.html#138-177' title='goto source code'>[src]</a></span></h1>
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<pre class='rust trait'>pub trait Error: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/std/error/trait.Error.html" title="trait std::error::Error">Error</a> {
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fn <a href='#tymethod.custom' class='fnname'>custom</a><T>(msg: T) -> Self<br> <span class="where">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a></span>;
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}</pre><div class='docblock'><p>Trait used by <code>Serialize</code> implementations to generically construct
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errors belonging to the <code>Serializer</code> against which they are
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currently running.</p>
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<h1 id="example-implementation" class="section-header"><a href="#example-implementation">Example implementation</a></h1>
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<p>The <a href="https://serde.rs/data-format.html">example data format</a> presented on the website shows an error
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type appropriate for a basic JSON data format.</p>
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</div>
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<h2 id='required-methods' class='small-section-header'>
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Required Methods<a href='#required-methods' class='anchor'></a>
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</h2>
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<div class='methods'>
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<h3 id='tymethod.custom' class='method'><span id='custom.v' class='invisible'><code>fn <a href='#tymethod.custom' class='fnname'>custom</a><T>(msg: T) -> Self <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a>, </span></code></span></h3><div class='docblock'><p>Used when a <a href="../trait.Serialize.html"><code>Serialize</code></a> implementation encounters any error
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while serializing a type.</p>
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<p>The message should not be capitalized and should not end with a
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period.</p>
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<p>For example, a filesystem <a href="https://doc.rust-lang.org/std/path/struct.Path.html"><code>Path</code></a> may refuse to serialize
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itself if it contains invalid UTF-8 data.</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">serde</span>::<span class="ident">ser</span>::{<span class="self">self</span>, <span class="ident">Serialize</span>, <span class="ident">Serializer</span>};
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<span class="kw">impl</span> <span class="ident">Serialize</span> <span class="kw">for</span> <span class="ident">Path</span> {
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<span class="kw">fn</span> <span class="ident">serialize</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">serializer</span>: <span class="ident">S</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">S</span>::<span class="prelude-val">Ok</span>, <span class="ident">S</span>::<span class="ident">Error</span><span class="op">></span>
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<span class="kw">where</span>
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<span class="ident">S</span>: <span class="ident">Serializer</span>,
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{
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<span class="kw">match</span> <span class="self">self</span>.<span class="ident">to_str</span>() {
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<span class="prelude-val">Some</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="ident">serializer</span>.<span class="ident">serialize_str</span>(<span class="ident">s</span>),
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<span class="prelude-val">None</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">ser</span>::<span class="ident">Error</span>::<span class="ident">custom</span>(<span class="string">"path contains invalid UTF-8 characters"</span>)),
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}
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}
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}</pre>
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</div></div>
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<h2 id='implementors' class='small-section-header'>
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Implementors<a href='#implementors' class='anchor'></a>
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</h2>
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<ul class='item-list' id='implementors-list'>
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<li><div class='out-of-band'><a class='srclink' href='../../src/serde/de/value.rs.html#98-106' title='goto source code'>[src]</a></div><code>impl Error for <a class="struct" href="../../serde/de/value/struct.Error.html" title="struct serde::de::value::Error">Error</a></code></li>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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