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<p class='location'>Struct Deserializer</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.from_reader">from_reader</a><a href="#method.from_slice">from_slice</a><a href="#method.from_str">from_str</a><a href="#method.end">end</a><a href="#method.into_iter">into_iter</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Deserializer%3C%27de%3E">Deserializer<'de></a></div></div><p class='location'><a href='../index.html'>serde_json</a>::<wbr><a href='index.html'>de</a></p><script>window.sidebarCurrent = {name: 'Deserializer', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>serde_json</a>::<wbr><a href='index.html'>de</a>::<wbr><a class="struct" href=''>Deserializer</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../../src/serde_json/de.rs.html#32-36' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct Deserializer<R> { /* fields omitted */ }</pre><div class='docblock'><p>A structure that deserializes JSON into Rust values.</p>
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</div>
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<h2 id='methods' class='small-section-header'>
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Methods<a href='#methods' class='anchor'></a>
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</h2>
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<h3 id='impl' class='impl'><span class='in-band'><code>impl<'de, R> <a class="struct" href="../../serde_json/de/struct.Deserializer.html" title="struct serde_json::de::Deserializer">Deserializer</a><R> <span class="where fmt-newline">where<br> R: <a class="trait" href="../../serde_json/de/trait.Read.html" title="trait serde_json::de::Read">Read</a><'de>, </span></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#38-57' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><code>pub fn <a href='#method.new' class='fnname'>new</a>(read: R) -> Self</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#50-56' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Create a JSON deserializer from one of the possible serde_json input
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sources.</p>
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<p>Typically it is more convenient to use one of these methods instead:</p>
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<ul>
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<li>Deserializer::from_str</li>
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<li>Deserializer::from_bytes</li>
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<li>Deserializer::from_reader</li>
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</ul>
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</div></div><h3 id='impl-1' class='impl'><span class='in-band'><code>impl<R> <a class="struct" href="../../serde_json/de/struct.Deserializer.html" title="struct serde_json::de::Deserializer">Deserializer</a><<a class="struct" href="../../serde_json/de/struct.IoRead.html" title="struct serde_json::de::IoRead">IoRead</a><R>> <span class="where fmt-newline">where<br> R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>, </span></code><a href='#impl-1' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#59-67' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.from_reader' class="method"><span id='from_reader.v' class='invisible'><code>pub fn <a href='#method.from_reader' class='fnname'>from_reader</a>(reader: R) -> Self</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#64-66' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Creates a JSON deserializer from an <code>io::Read</code>.</p>
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</div></div><h3 id='impl-2' class='impl'><span class='in-band'><code>impl<'a> <a class="struct" href="../../serde_json/de/struct.Deserializer.html" title="struct serde_json::de::Deserializer">Deserializer</a><<a class="struct" href="../../serde_json/de/struct.SliceRead.html" title="struct serde_json::de::SliceRead">SliceRead</a><'a>></code><a href='#impl-2' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#69-74' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.from_slice' class="method"><span id='from_slice.v' class='invisible'><code>pub fn <a href='#method.from_slice' class='fnname'>from_slice</a>(bytes: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> Self</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#71-73' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Creates a JSON deserializer from a <code>&[u8]</code>.</p>
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</div></div><h3 id='impl-3' class='impl'><span class='in-band'><code>impl<'a> <a class="struct" href="../../serde_json/de/struct.Deserializer.html" title="struct serde_json::de::Deserializer">Deserializer</a><<a class="struct" href="../../serde_json/de/struct.StrRead.html" title="struct serde_json::de::StrRead">StrRead</a><'a>></code><a href='#impl-3' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#76-81' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.from_str' class="method"><span id='from_str.v' class='invisible'><code>pub fn <a href='#method.from_str' class='fnname'>from_str</a>(s: &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> Self</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#78-80' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Creates a JSON deserializer from a <code>&str</code>.</p>
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</div></div><h3 id='impl-4' class='impl'><span class='in-band'><code>impl<'de, R: <a class="trait" href="../../serde_json/de/trait.Read.html" title="trait serde_json::de::Read">Read</a><'de>> <a class="struct" href="../../serde_json/de/struct.Deserializer.html" title="struct serde_json::de::Deserializer">Deserializer</a><R></code><a href='#impl-4' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#124-949' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.end' class="method"><span id='end.v' class='invisible'><code>pub fn <a href='#method.end' class='fnname'>end</a>(&mut self) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#128-133' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>The <code>Deserializer::end</code> method should be called after a value has been fully deserialized.
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This allows the <code>Deserializer</code> to validate that the input stream is at the end or that it
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only has trailing whitespace.</p>
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</div><h4 id='method.into_iter' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="../../serde_json/de/struct.StreamDeserializer.html" title="struct serde_json::de::StreamDeserializer">StreamDeserializer</a><'de, R, T></span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="../../serde_json/de/struct.StreamDeserializer.html" title="struct serde_json::de::StreamDeserializer">StreamDeserializer</a><'de, R, T></h3><code class="content"><span class="where fmt-newline">impl<'de, R, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="../../serde_json/de/struct.StreamDeserializer.html" title="struct serde_json::de::StreamDeserializer">StreamDeserializer</a><'de, R, T> <span class="where fmt-newline">where<br> R: <a class="trait" href="../../serde_json/de/trait.Read.html" title="trait serde_json::de::Read">Read</a><'de>,<br> T: <a class="trait" href="../../serde/de/trait.Deserialize.html" title="trait serde::de::Deserialize">Deserialize</a><'de>, </span></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><T>;</span></code></div></div><span id='into_iter.v' class='invisible'><code>pub fn <a href='#method.into_iter' class='fnname'>into_iter</a><T>(self) -> <a class="struct" href="../../serde_json/de/struct.StreamDeserializer.html" title="struct serde_json::de::StreamDeserializer">StreamDeserializer</a><'de, R, T> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../serde/de/trait.Deserialize.html" title="trait serde::de::Deserialize">Deserialize</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#136-149' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Turn a JSON deserializer into an iterator over values of type T.</p>
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</div></div>
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<h2 id='implementations' class='small-section-header'>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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</h2>
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<h3 id='impl-Deserializer%3C%27de%3E' class='impl'><span class='in-band'><code>impl<'de, 'a, R: <a class="trait" href="../../serde_json/de/trait.Read.html" title="trait serde_json::de::Read">Read</a><'de>> <a class="trait" href="../../serde/de/trait.Deserializer.html" title="trait serde::de::Deserializer">Deserializer</a><'de> for &'a mut <a class="struct" href="../../serde_json/de/struct.Deserializer.html" title="struct serde_json::de::Deserializer">Deserializer</a><R></code><a href='#impl-Deserializer%3C%27de%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1006-1626' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='associatedtype.Error' class="type"><span id='Error.t' class='invisible'><code>type <a href='../../serde/de/trait.Deserializer.html#associatedtype.Error' class="type">Error</a> = <a class="struct" href="../../serde_json/error/struct.Error.html" title="struct serde_json::error::Error">Error</a></code></span></h4>
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<div class='docblock'><p>The error type that can be returned if some error occurs during deserialization. <a href="../../serde/de/trait.Deserializer.html#associatedtype.Error">Read more</a></p>
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</div><h4 id='method.deserialize_any' class="method"><span id='deserialize_any.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_any' class='fnname'>deserialize_any</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1010-1094' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Require the <code>Deserializer</code> to figure out how to drive the visitor based on what data type is in the input. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_any">Read more</a></p>
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||
</div><h4 id='method.deserialize_bool' class="method"><span id='deserialize_bool.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_bool' class='fnname'>deserialize_bool</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1096-1125' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>bool</code> value.</p>
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</div><h4 id='method.deserialize_i8' class="method"><span id='deserialize_i8.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_i8' class='fnname'>deserialize_i8</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting an <code>i8</code> value.</p>
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</div><h4 id='method.deserialize_i16' class="method"><span id='deserialize_i16.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_i16' class='fnname'>deserialize_i16</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting an <code>i16</code> value.</p>
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</div><h4 id='method.deserialize_i32' class="method"><span id='deserialize_i32.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_i32' class='fnname'>deserialize_i32</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting an <code>i32</code> value.</p>
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</div><h4 id='method.deserialize_i64' class="method"><span id='deserialize_i64.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_i64' class='fnname'>deserialize_i64</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting an <code>i64</code> value.</p>
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</div><h4 id='method.deserialize_u8' class="method"><span id='deserialize_u8.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_u8' class='fnname'>deserialize_u8</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>u8</code> value.</p>
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</div><h4 id='method.deserialize_u16' class="method"><span id='deserialize_u16.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_u16' class='fnname'>deserialize_u16</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>u16</code> value.</p>
|
||
</div><h4 id='method.deserialize_u32' class="method"><span id='deserialize_u32.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_u32' class='fnname'>deserialize_u32</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>u32</code> value.</p>
|
||
</div><h4 id='method.deserialize_u64' class="method"><span id='deserialize_u64.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_u64' class='fnname'>deserialize_u64</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>u64</code> value.</p>
|
||
</div><h4 id='method.deserialize_f32' class="method"><span id='deserialize_f32.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_f32' class='fnname'>deserialize_f32</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>f32</code> value.</p>
|
||
</div><h4 id='method.deserialize_f64' class="method"><span id='deserialize_f64.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_f64' class='fnname'>deserialize_f64</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#997-1002' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>f64</code> value.</p>
|
||
</div><h4 id='method.deserialize_char' class="method"><span id='deserialize_char.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_char' class='fnname'>deserialize_char</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1202-1207' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a <code>char</code> value.</p>
|
||
</div><h4 id='method.deserialize_str' class="method"><span id='deserialize_str.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_str' class='fnname'>deserialize_str</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1209-1236' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a string value and does not benefit from taking ownership of buffered data owned by the <code>Deserializer</code>. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_str">Read more</a></p>
|
||
</div><h4 id='method.deserialize_string' class="method"><span id='deserialize_string.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_string' class='fnname'>deserialize_string</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1238-1243' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a string value and would benefit from taking ownership of buffered data owned by the <code>Deserializer</code>. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_string">Read more</a></p>
|
||
</div><h4 id='method.deserialize_bytes' class="method"><span id='deserialize_bytes.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_bytes' class='fnname'>deserialize_bytes</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1326-1354' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Parses a JSON string as bytes. Note that this function does not check
|
||
whether the bytes represent a valid UTF-8 string.</p>
|
||
<p>The relevant part of the JSON specification is Section 8.2 of <a href="https://tools.ietf.org/html/rfc7159">RFC
|
||
7159</a>:</p>
|
||
<blockquote>
|
||
<p>When all the strings represented in a JSON text are composed entirely
|
||
of Unicode characters (however escaped), then that JSON text is
|
||
interoperable in the sense that all software implementations that
|
||
parse it will agree on the contents of names and of string values in
|
||
objects and arrays.</p>
|
||
<p>However, the ABNF in this specification allows member names and string
|
||
values to contain bit sequences that cannot encode Unicode characters;
|
||
for example, "\uDEAD" (a single unpaired UTF-16 surrogate). Instances
|
||
of this have been observed, for example, when a library truncates a
|
||
UTF-16 string without checking whether the truncation split a
|
||
surrogate pair. The behavior of software that receives JSON texts
|
||
containing such values is unpredictable; for example, implementations
|
||
might return different values for the length of a string value or even
|
||
suffer fatal runtime exceptions.</p>
|
||
</blockquote>
|
||
<p>The behavior of serde_json is specified to fail on non-UTF-8 strings
|
||
when deserializing into Rust UTF-8 string types such as String, and
|
||
succeed with non-UTF-8 bytes when deserializing using this method.</p>
|
||
<p>Escape sequences are processed as usual, and for <code>\uXXXX</code> escapes it is
|
||
still checked if the hex number represents a valid Unicode code point.</p>
|
||
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
|
||
<p>You can use this to parse JSON strings containing invalid UTF-8 bytes.</p>
|
||
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_json</span>;
|
||
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_bytes</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">serde_bytes</span>::<span class="ident">ByteBuf</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">look_at_bytes</span>() <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">serde_json</span>::<span class="ident">Error</span><span class="op">></span> {
|
||
<span class="kw">let</span> <span class="ident">json_data</span> <span class="op">=</span> <span class="string">b"\"some bytes: \xe5\x00\xe5\""</span>;
|
||
<span class="kw">let</span> <span class="ident">bytes</span>: <span class="ident">ByteBuf</span> <span class="op">=</span> <span class="ident">serde_json</span>::<span class="ident">from_slice</span>(<span class="ident">json_data</span>)<span class="question-mark">?</span>;
|
||
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b'\xe5'</span>, <span class="ident">bytes</span>[<span class="number">12</span>]);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b'\0'</span>, <span class="ident">bytes</span>[<span class="number">13</span>]);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b'\xe5'</span>, <span class="ident">bytes</span>[<span class="number">14</span>]);
|
||
|
||
<span class="prelude-val">Ok</span>(())
|
||
}</pre>
|
||
<p>Backslash escape sequences like <code>\n</code> are still interpreted and required
|
||
to be valid, and <code>\u</code> escape sequences are required to represent valid
|
||
Unicode code points.</p>
|
||
|
||
<pre class="rust rust-example-rendered">
|
||
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_json</span>;
|
||
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde_bytes</span>;
|
||
|
||
<span class="kw">use</span> <span class="ident">serde_bytes</span>::<span class="ident">ByteBuf</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">look_at_bytes</span>() {
|
||
<span class="kw">let</span> <span class="ident">json_data</span> <span class="op">=</span> <span class="string">b"\"invalid unicode surrogate: \\uD801\""</span>;
|
||
<span class="kw">let</span> <span class="ident">parsed</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">ByteBuf</span>, _<span class="op">></span> <span class="op">=</span> <span class="ident">serde_json</span>::<span class="ident">from_slice</span>(<span class="ident">json_data</span>);
|
||
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">parsed</span>.<span class="ident">is_err</span>());
|
||
|
||
<span class="kw">let</span> <span class="ident">expected_msg</span> <span class="op">=</span> <span class="string">"unexpected end of hex escape at line 1 column 35"</span>;
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">expected_msg</span>, <span class="ident">parsed</span>.<span class="ident">unwrap_err</span>().<span class="ident">to_string</span>());
|
||
}</pre>
|
||
</div><h4 id='method.deserialize_byte_buf' class="method"><span id='deserialize_byte_buf.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_byte_buf' class='fnname'>deserialize_byte_buf</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1357-1362' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a byte array and would benefit from taking ownership of buffered data owned by the <code>Deserializer</code>. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_byte_buf">Read more</a></p>
|
||
</div><h4 id='method.deserialize_option' class="method"><span id='deserialize_option.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_option' class='fnname'>deserialize_option</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1366-1378' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Parses a <code>null</code> as a None, and any other values as a <code>Some(...)</code>.</p>
|
||
</div><h4 id='method.deserialize_unit' class="method"><span id='deserialize_unit.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_unit' class='fnname'>deserialize_unit</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1380-1404' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a unit value.</p>
|
||
</div><h4 id='method.deserialize_unit_struct' class="method"><span id='deserialize_unit_struct.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_unit_struct' class='fnname'>deserialize_unit_struct</a><V>(<br> self, <br> _name: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> visitor: V<br>) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1406-1411' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a unit struct with a particular name. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_unit_struct">Read more</a></p>
|
||
</div><h4 id='method.deserialize_newtype_struct' class="method"><span id='deserialize_newtype_struct.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_newtype_struct' class='fnname'>deserialize_newtype_struct</a><V>(<br> self, <br> _name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> visitor: V<br>) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1415-1420' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Parses a newtype struct as the underlying value.</p>
|
||
</div><h4 id='method.deserialize_seq' class="method"><span id='deserialize_seq.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_seq' class='fnname'>deserialize_seq</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1422-1457' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a sequence of values.</p>
|
||
</div><h4 id='method.deserialize_tuple' class="method"><span id='deserialize_tuple.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_tuple' class='fnname'>deserialize_tuple</a><V>(self, _len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1459-1464' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a sequence of values and knows how many values there are without looking at the serialized data. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_tuple">Read more</a></p>
|
||
</div><h4 id='method.deserialize_tuple_struct' class="method"><span id='deserialize_tuple_struct.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_tuple_struct' class='fnname'>deserialize_tuple_struct</a><V>(<br> self, <br> _name: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> _len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> visitor: V<br>) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1466-1476' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a tuple struct with a particular name and number of fields. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_tuple_struct">Read more</a></p>
|
||
</div><h4 id='method.deserialize_map' class="method"><span id='deserialize_map.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_map' class='fnname'>deserialize_map</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1478-1513' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a map of key-value pairs.</p>
|
||
</div><h4 id='method.deserialize_struct' class="method"><span id='deserialize_struct.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_struct' class='fnname'>deserialize_struct</a><V>(<br> self, <br> _name: &'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> _fields: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'static [</a>&'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <br> visitor: V<br>) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1515-1571' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting a struct with a particular name and fields. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_struct">Read more</a></p>
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</div><h4 id='method.deserialize_enum' class="method"><span id='deserialize_enum.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_enum' class='fnname'>deserialize_enum</a><V>(<br> self, <br> _name: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> _variants: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'static [</a>&'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>, <br> visitor: V<br>) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1576-1610' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Parses an enum as an object like <code>{"$KEY":$VALUE}</code>, where $VALUE is either a straight
|
||
value, a <code>[..]</code>, or a <code>{..}</code>.</p>
|
||
</div><h4 id='method.deserialize_identifier' class="method"><span id='deserialize_identifier.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_identifier' class='fnname'>deserialize_identifier</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1612-1617' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type is expecting the name of a struct field or the discriminant of an enum variant. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_identifier">Read more</a></p>
|
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</div><h4 id='method.deserialize_ignored_any' class="method"><span id='deserialize_ignored_any.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#tymethod.deserialize_ignored_any' class='fnname'>deserialize_ignored_any</a><V>(self, visitor: V) -> <a class="type" href="../../serde_json/type.Result.html" title="type serde_json::Result">Result</a><V::<a class="type" href="../../serde/de/trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../serde/de/trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde_json/de.rs.html#1619-1625' title='goto source code'>[src]</a></span></h4>
|
||
<div class='docblock'><p>Hint that the <code>Deserialize</code> type needs to deserialize a value whose type doesn't matter because it is ignored. <a href="../../serde/de/trait.Deserializer.html#tymethod.deserialize_ignored_any">Read more</a></p>
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</div><h4 id='method.is_human_readable' class="method"><span id='is_human_readable.v' class='invisible'><code>fn <a href='../../serde/de/trait.Deserializer.html#method.is_human_readable' class='fnname'>is_human_readable</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/serde/de/mod.rs.html#1206-1208' title='goto source code'>[src]</a></span></h4>
|
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<div class='docblock'><p>Determine whether <code>Deserialize</code> implementations should expect to deserialize their human-readable form. <a href="../../serde/de/trait.Deserializer.html#method.is_human_readable">Read more</a></p>
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