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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 `de` mod in crate `serde`."><meta name="keywords" content="rust, rustlang, rust-lang, de"><title>serde::de - 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><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[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><a href='../../serde/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a><p class='location'>Module de</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#modules">Modules</a></li><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#traits">Traits</a></li></ul></div><p class='location'><a href='../index.html'>serde</a></p><script>window.sidebarCurrent = {name: 'de', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/serde/de/mod.rs.html#1-2269' title='goto source code'>[src]</a></span><span class='in-band'>Module <a href='../index.html'>serde</a>::<wbr><a class="mod" href=''>de</a></span></h1><div class='docblock'><p>Generic data structure deserialization framework.</p>
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<p>The two most important traits in this module are <a href="../trait.Deserialize.html"><code>Deserialize</code></a> and
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<a href="../trait.Deserializer.html"><code>Deserializer</code></a>.</p>
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<ul>
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<li><strong>A type that implements <code>Deserialize</code> is a data structure</strong> that can be
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deserialized from any data format supported by Serde, and conversely</li>
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<li><strong>A type that implements <code>Deserializer</code> is a data format</strong> that can
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deserialize any data structure supported by Serde.</li>
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</ul>
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<h1 id="the-deserialize-trait" class="section-header"><a href="#the-deserialize-trait">The Deserialize trait</a></h1>
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<p>Serde provides <a href="../trait.Deserialize.html"><code>Deserialize</code></a> implementations for many Rust primitive and
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standard library types. The complete list is below. All of these can be
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deserialized using Serde out of the box.</p>
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<p>Additionally, Serde provides a procedural macro called <a href="https://crates.io/crates/serde_derive"><code>serde_derive</code></a> to
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automatically generate <a href="../trait.Deserialize.html"><code>Deserialize</code></a> 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 use this.</p>
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<p>In rare cases it may be necessary to implement <a href="../trait.Deserialize.html"><code>Deserialize</code></a> manually for
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some type in your program. See the <a href="https://serde.rs/impl-deserialize.html">Implementing <code>Deserialize</code></a> section of
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the manual for more about this.</p>
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<p>Third-party crates may provide <a href="../trait.Deserialize.html"><code>Deserialize</code></a> implementations for types
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that they expose. For example the <a href="https://crates.io/crates/linked-hash-map"><code>linked-hash-map</code></a> crate provides a
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<a href="https://docs.rs/linked-hash-map/*/linked_hash_map/struct.LinkedHashMap.html"><code>LinkedHashMap<K, V></code></a> type that is deserializable by Serde because the
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crate provides an implementation of <a href="../trait.Deserialize.html"><code>Deserialize</code></a> for it.</p>
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<h1 id="the-deserializer-trait" class="section-header"><a href="#the-deserializer-trait">The Deserializer trait</a></h1>
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<p><a href="../trait.Deserializer.html"><code>Deserializer</code></a> implementations are provided by third-party crates, for
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example <a href="https://github.com/serde-rs/json"><code>serde_json</code></a>, <a href="https://github.com/dtolnay/serde-yaml"><code>serde_yaml</code></a> and <a href="https://github.com/TyOverby/bincode"><code>bincode</code></a>.</p>
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<p>A partial list of well-maintained formats is given on the <a href="https://serde.rs/#data-formats">Serde
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website</a>.</p>
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<h1 id="implementations-of-deserialize-provided-by-serde" class="section-header"><a href="#implementations-of-deserialize-provided-by-serde">Implementations of Deserialize provided by Serde</a></h1>
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<p>This is a slightly different set of types than what is supported for
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serialization. Some types can be serialized by Serde but not deserialized.
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One example is <code>OsStr</code>.</p>
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<ul>
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<li><strong>Primitive types</strong>:
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<ul>
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<li>bool</li>
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<li>i8, i16, i32, i64, i128, isize</li>
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<li>u8, u16, u32, u64, u128, usize</li>
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<li>f32, f64</li>
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<li>char</li>
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</ul>
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</li>
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<li><strong>Compound types</strong>:
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<ul>
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<li>[T; 0] through [T; 32]</li>
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<li>tuples up to size 16</li>
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</ul>
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</li>
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<li><strong>Common standard library types</strong>:
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<ul>
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<li>String</li>
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<li>Option<T></li>
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<li>Result<T, E></li>
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<li>PhantomData<T></li>
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</ul>
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</li>
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<li><strong>Wrapper types</strong>:
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<ul>
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<li>Box<T></li>
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<li>Box<[T]></li>
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<li>Box<str></li>
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<li>Cow<'a, T></li>
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<li>Cell<T></li>
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<li>RefCell<T></li>
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<li>Mutex<T></li>
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<li>RwLock<T></li>
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<li>Rc<T> <em>(if</em> features = ["rc"] <em>is enabled)</em></li>
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<li>Arc<T> <em>(if</em> features = ["rc"] <em>is enabled)</em></li>
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</ul>
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</li>
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<li><strong>Collection types</strong>:
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<ul>
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<li>BTreeMap<K, V></li>
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<li>BTreeSet<T></li>
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<li>BinaryHeap<T></li>
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<li>HashMap<K, V, H></li>
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<li>HashSet<T, H></li>
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<li>LinkedList<T></li>
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<li>VecDeque<T></li>
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<li>Vec<T></li>
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</ul>
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</li>
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<li><strong>Zero-copy types</strong>:
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<ul>
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<li>&str</li>
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<li>&[u8]</li>
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</ul>
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</li>
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<li><strong>FFI types</strong>:
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<ul>
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<li>CString</li>
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<li>Box<CStr></li>
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<li>OsString</li>
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</ul>
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</li>
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<li><strong>Miscellaneous standard library types</strong>:
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<ul>
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<li>Duration</li>
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<li>SystemTime</li>
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<li>Path</li>
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<li>PathBuf</li>
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<li>Range<T></li>
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<li>RangeInclusive<T></li>
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<li>Bound<T></li>
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<li>num::NonZero*</li>
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<li><code>!</code> <em>(unstable)</em></li>
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</ul>
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</li>
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<li><strong>Net types</strong>:
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<ul>
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<li>IpAddr</li>
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<li>Ipv4Addr</li>
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<li>Ipv6Addr</li>
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<li>SocketAddr</li>
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<li>SocketAddrV4</li>
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<li>SocketAddrV6</li>
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</ul>
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</li>
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</ul>
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</div><h2 id='modules' class='section-header'><a href="#modules">Modules</a></h2>
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<table><tr class='module-item'><td><a class="mod" href="value/index.html" title='serde::de::value mod'>value</a></td><td class='docblock-short'><p>Building blocks for deserializing basic values using the <code>IntoDeserializer</code>
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trait.</p>
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</td></tr></table><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table><tr class='module-item'><td><a class="struct" href="struct.IgnoredAny.html" title='serde::de::IgnoredAny struct'>IgnoredAny</a></td><td class='docblock-short'><p>An efficient way of discarding data from a deserializer.</p>
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</td></tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
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<table><tr class='module-item'><td><a class="enum" href="enum.Unexpected.html" title='serde::de::Unexpected enum'>Unexpected</a></td><td class='docblock-short'><p><code>Unexpected</code> represents an unexpected invocation of any one of the <code>Visitor</code>
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trait methods.</p>
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</td></tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
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<table><tr class='module-item'><td><a class="trait" href="trait.Deserialize.html" title='serde::de::Deserialize trait'>Deserialize</a></td><td class='docblock-short'><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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</td></tr><tr class='module-item'><td><a class="trait" href="trait.DeserializeOwned.html" title='serde::de::DeserializeOwned trait'>DeserializeOwned</a></td><td class='docblock-short'><p>A data structure that can be deserialized without borrowing any data from
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the deserializer.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.DeserializeSeed.html" title='serde::de::DeserializeSeed trait'>DeserializeSeed</a></td><td class='docblock-short'><p><code>DeserializeSeed</code> is the stateful form of the <code>Deserialize</code> trait. If you
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ever find yourself looking for a way to pass data into a <code>Deserialize</code> impl,
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this trait is the way to do it.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.Deserializer.html" title='serde::de::Deserializer trait'>Deserializer</a></td><td class='docblock-short'><p>A <strong>data format</strong> that can deserialize any data structure supported by
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Serde.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.EnumAccess.html" title='serde::de::EnumAccess trait'>EnumAccess</a></td><td class='docblock-short'><p>Provides a <code>Visitor</code> access to the data of an enum in the input.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.Error.html" title='serde::de::Error trait'>Error</a></td><td class='docblock-short'><p>The <code>Error</code> trait allows <code>Deserialize</code> implementations to create descriptive
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error messages belonging to the <code>Deserializer</code> against which they are
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currently running.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.Expected.html" title='serde::de::Expected trait'>Expected</a></td><td class='docblock-short'><p><code>Expected</code> represents an explanation of what data a <code>Visitor</code> was expecting
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to receive.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.IntoDeserializer.html" title='serde::de::IntoDeserializer trait'>IntoDeserializer</a></td><td class='docblock-short'><p>Converts an existing value into a <code>Deserializer</code> from which other values can
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be deserialized.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.MapAccess.html" title='serde::de::MapAccess trait'>MapAccess</a></td><td class='docblock-short'><p>Provides a <code>Visitor</code> access to each entry of a map in the input.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.SeqAccess.html" title='serde::de::SeqAccess trait'>SeqAccess</a></td><td class='docblock-short'><p>Provides a <code>Visitor</code> access to each element of a sequence in the input.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.VariantAccess.html" title='serde::de::VariantAccess trait'>VariantAccess</a></td><td class='docblock-short'><p><code>VariantAccess</code> is a visitor that is created by the <code>Deserializer</code> and
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passed to the <code>Deserialize</code> to deserialize the content of a particular enum
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variant.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.Visitor.html" title='serde::de::Visitor trait'>Visitor</a></td><td class='docblock-short'><p>This trait represents a visitor that walks through a deserializer.</p>
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</td></tr></table></section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g., <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g., <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g., <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../";window.currentCrate = "serde";</script><script src="../../aliases.js"></script><script src="../../main.js"></script><script defer src="../../search-index.js"></script></body></html>
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