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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="API documentation for the Rust `Deserialize` trait in crate `serde`."><meta name="keywords" content="rust, rustlang, rust-lang, Deserialize"><title>serde::Deserialize - Rust</title><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="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script></head><body class="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><p class='location'>Trait Deserialize</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.deserialize">deserialize</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-Deserialize%3C%27de%3E">()</a><a href="#impl-Deserialize%3C%27de%3E">bool</a><a href="#impl-Deserialize%3C%27de%3E">i8</a><a href="#impl-Deserialize%3C%27de%3E">i16</a><a href="#impl-Deserialize%3C%27de%3E">i32</a><a href="#impl-Deserialize%3C%27de%3E">i64</a><a href="#impl-Deserialize%3C%27de%3E">isize</a><a href="#impl-Deserialize%3C%27de%3E">u8</a><a href="#impl-Deserialize%3C%27de%3E">u16</a><a href="#impl-Deserialize%3C%27de%3E">u32</a><a href="#impl-Deserialize%3C%27de%3E">u64</a><a href="#impl-Deserialize%3C%27de%3E">usize</a><a href="#impl-Deserialize%3C%27de%3E">f32</a><a href="#impl-Deserialize%3C%27de%3E">f64</a><a href="#impl-Deserialize%3C%27de%3E">i128</a><a href="#impl-Deserialize%3C%27de%3E">u128</a><a href="#impl-Deserialize%3C%27de%3E">char</a><a href="#impl-Deserialize%3C%27de%3E">String</a><a href="#impl-Deserialize%3C%27de%3E">&'a str</a><a href="#impl-Deserialize%3C%27de%3E">&'a [u8]</a><a href="#impl-Deserialize%3C%27de%3E">CString</a><a href="#impl-Deserialize%3C%27de%3E">Box<CStr></a><a href="#impl-Deserialize%3C%27de%3E">Option<T></a><a href="#impl-Deserialize%3C%27de%3E">PhantomData<T></a><a href="#impl-Deserialize%3C%27de%3E">BinaryHeap<T></a><a href="#impl-Deserialize%3C%27de%3E">BTreeSet<T></a><a href="#impl-Deserialize%3C%27de%3E">LinkedList<T></a><a href="#impl-Deserialize%3C%27de%3E">HashSet<T, S></a><a href="#impl-Deserialize%3C%27de%3E">VecDeque<T></a><a href="#impl-Deserialize%3C%27de%3E">Vec<T></a><a href="#impl-Deserialize%3C%27de%3E">[T; 0]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 1]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 2]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 3]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 4]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 5]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 6]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 7]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 8]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 9]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 10]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 11]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 12]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 13]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 14]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 15]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 16]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 17]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 18]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 19]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 20]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 21]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 22]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 23]</a><a href="#impl-Deserialize%3C%27de%3E">[T; 24]</a><a href="#impl-Deserialize%3C%27de
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fn <a href='#tymethod.deserialize' class='fnname'>deserialize</a><D>(deserializer: D) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, D::<a class="type" href="../serde/trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>><br> <span class="where">where<br> D: <a class="trait" href="../serde/trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de></span>;
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}</pre></div><div class='docblock'><p>A <strong>data structure</strong> that can be deserialized from any data format supported
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by Serde.</p>
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<p>Serde provides <code>Deserialize</code> implementations for many Rust primitive and
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standard library types. The complete list is <a href="https://docs.serde.rs/serde/de/index.html">here</a>. All of these can
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be deserialized using Serde out of the box.</p>
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<p>Additionally, Serde provides a procedural macro called <code>serde_derive</code> to
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automatically generate <code>Deserialize</code> implementations for structs and enums
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in your program. See the <a href="https://serde.rs/derive.html">derive section of the manual</a> for how to
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use this.</p>
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<p>In rare cases it may be necessary to implement <code>Deserialize</code> manually for
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some type in your program. See the <a href="https://serde.rs/impl-deserialize.html">Implementing
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<code>Deserialize</code></a> section of the manual for more about this.</p>
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<p>Third-party crates may provide <code>Deserialize</code> implementations for types that
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they expose. For example the <code>linked-hash-map</code> crate provides a
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<code>LinkedHashMap<K, V></code> type that is deserializable by Serde because the crate
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provides an implementation of <code>Deserialize</code> for it.</p>
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<h1 id="lifetime" class="section-header"><a href="#lifetime">Lifetime</a></h1>
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<p>The <code>'de</code> lifetime of this trait is the lifetime of data that may be
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borrowed by <code>Self</code> when deserialized. See the page <a href="https://serde.rs/lifetimes.html">Understanding
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deserializer lifetimes</a> for a more detailed explanation of these lifetimes.</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.deserialize' class='method'><span id='deserialize.v' class='invisible'><code>fn <a href='#tymethod.deserialize' class='fnname'>deserialize</a><D>(deserializer: D) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, D::<a class="type" href="../serde/trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>> <span class="where fmt-newline">where<br> D: <a class="trait" href="../serde/trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de>, </span></code></span></h3><div class='docblock'><p>Deserialize this value from the given Serde deserializer.</p>
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<p>See the <a href="https://serde.rs/impl-deserialize.html">Implementing <code>Deserialize</code></a> section of the
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manual for more information about how to implement this method.</p>
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</div></div>
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<h2 id='foreign-impls' class='small-section-header'>
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Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a>
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</h2>
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<h3 id='impl-Deserialize%3C%27de%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'de> <a class="trait" href="../serde/trait.Deserialize.html" title="trait serde::Deserialize">Deserialize</a><'de> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a></code><a href='#impl-Deserialize%3C%27de%3E' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/serde/de/impls.rs.html#43-50' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.deserialize' class="method"><span id='deserialize.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.deserialize' class='fnname'>deserialize</a><D>(deserializer: D) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, D::<a class="type" href="../serde/trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>> <span class="where fmt-newline">where<br> D: <a class="trait" href="../serde/trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/serde/de/impls.rs.html#44-49' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Deserialize%3C%27de%3E-1' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'de> <a class="trait" href="../serde/trait.Deserialize.html" title="trait serde::Deserialize">Deserialize</a><'de> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a href='#impl-Deserialize%3C%27de%3E-1' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/serde/de/impls.rs.html#81-88' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.deserialize-1' class="method"><span id='deserialize.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.deserialize' class='fnname'>deserialize</a><D>(deserializer: D) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, D::<a class="type" href="../serde/trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>> <span class="where fmt-newline">where<br> D: <a class="trait" href="../serde/trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de>, </span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/serde/de/impls.rs.html#82-87' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4></div></span><h3 id='impl-Deserialize%3C%27de%3E-2' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'de> <a class="trait" href="../serde/trait.Deserialize.html" title="trait serde::Deserialize">Deserialize</a><'de> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></code><a href='#impl-Deserialize%3C%27de%3E-2' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/serde/de/impls.rs.html#121-143' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><span class='docblock autohide'><div class='impl-items'><h4 id='method.deserialize-2' class="method"><span id='deserialize.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='#method.deserialize' class='fnname'>deseriali
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