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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="Serde"><title>serde - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-5bc39a1768837dd0.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="serde" data-themes="" data-resource-suffix="" data-rustdoc-version="1.77.2 (25ef9e3d8 2024-04-09)" data-channel="1.77.2" data-search-js="search-dd67cee4cfa65049.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-4c98445ec4002617.js"></script><script defer src="../crates.js"></script><script defer src="../static.files/main-48f368f3872407c8.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-04d5337699b92874.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc mod crate"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../serde/index.html">serde</a><span class="version">1.0.197</span></h2></div><div class="sidebar-elems"><ul class="block">
<li><a id="all-types" href="all.html">All Items</a></li></ul><section><ul class="block"><li><a href="#modules">Modules</a></li><li><a href="#macros">Macros</a></li><li><a href="#traits">Traits</a></li><li><a href="#derives">Derive Macros</a></li></ul></section></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../serde/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press S to search, ? for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Crate <a class="mod" href="#">serde</a><button id="copy-path" title="Copy item path to clipboard"><img src="../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../src/serde/lib.rs.html#1-335">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><h2 id="serde"><a class="doc-anchor" href="#serde">§</a>Serde</h2>
<p>Serde is a framework for <em><strong>ser</strong></em>ializing and <em><strong>de</strong></em>serializing Rust data
structures efficiently and generically.</p>
<p>The Serde ecosystem consists of data structures that know how to serialize
and deserialize themselves along with data formats that know how to
serialize and deserialize other things. Serde provides the layer by which
these two groups interact with each other, allowing any supported data
structure to be serialized and deserialized using any supported data format.</p>
<p>See the Serde website <a href="https://serde.rs/">https://serde.rs/</a> for additional documentation and
usage examples.</p>
<h3 id="design"><a class="doc-anchor" href="#design">§</a>Design</h3>
<p>Where many other languages rely on runtime reflection for serializing data,
Serde is instead built on Rusts powerful trait system. A data structure
that knows how to serialize and deserialize itself is one that implements
Serdes <code>Serialize</code> and <code>Deserialize</code> traits (or uses Serdes derive
attribute to automatically generate implementations at compile time). This
avoids any overhead of reflection or runtime type information. In fact in
many situations the interaction between data structure and data format can
be completely optimized away by the Rust compiler, leaving Serde
serialization to perform the same speed as a handwritten serializer for the
specific selection of data structure and data format.</p>
<h3 id="data-formats"><a class="doc-anchor" href="#data-formats">§</a>Data formats</h3>
<p>The following is a partial list of data formats that have been implemented
for Serde by the community.</p>
<ul>
<li><a href="https://github.com/serde-rs/json">JSON</a>, the ubiquitous JavaScript Object Notation used by many HTTP APIs.</li>
<li><a href="https://github.com/jamesmunns/postcard">Postcard</a>, a no_std and embedded-systems friendly compact binary format.</li>
<li><a href="https://github.com/enarx/ciborium">CBOR</a>, a Concise Binary Object Representation designed for small message
size without the need for version negotiation.</li>
<li><a href="https://github.com/dtolnay/serde-yaml">YAML</a>, a self-proclaimed human-friendly configuration language that aint
markup language.</li>
<li><a href="https://github.com/3Hren/msgpack-rust">MessagePack</a>, an efficient binary format that resembles a compact JSON.</li>
<li><a href="https://docs.rs/toml">TOML</a>, a minimal configuration format used by <a href="https://doc.rust-lang.org/cargo/reference/manifest.html">Cargo</a>.</li>
<li><a href="https://github.com/birkenfeld/serde-pickle">Pickle</a>, a format common in the Python world.</li>
<li><a href="https://github.com/ron-rs/ron">RON</a>, a Rusty Object Notation.</li>
<li><a href="https://github.com/mongodb/bson-rust">BSON</a>, the data storage and network transfer format used by MongoDB.</li>
<li><a href="https://docs.rs/apache-avro">Avro</a>, a binary format used within Apache Hadoop, with support for schema
definition.</li>
<li><a href="https://github.com/callum-oakley/json5-rs">JSON5</a>, a superset of JSON including some productions from ES5.</li>
<li><a href="https://docs.rs/serde_qs">URL</a> query strings, in the x-www-form-urlencoded format.</li>
<li><a href="https://github.com/dtolnay/serde-starlark">Starlark</a>, the format used for describing build targets by the Bazel and
Buck build systems. <em>(serialization only)</em></li>
<li><a href="https://github.com/softprops/envy">Envy</a>, a way to deserialize environment variables into Rust structs.
<em>(deserialization only)</em></li>
<li><a href="https://github.com/softprops/envy-store">Envy Store</a>, a way to deserialize <a href="https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-parameter-store.html">AWS Parameter Store</a> parameters into
Rust structs. <em>(deserialization only)</em></li>
<li><a href="https://github.com/rotty/lexpr-rs">S-expressions</a>, the textual representation of code and data used by the
Lisp language family.</li>
<li><a href="https://docs.rs/zvariant">D-Bus</a>s binary wire format.</li>
<li><a href="https://github.com/google/flatbuffers/tree/master/rust/flexbuffers">FlexBuffers</a>, the schemaless cousin of Googles FlatBuffers zero-copy
serialization format.</li>
<li><a href="https://github.com/P3KI/bendy">Bencode</a>, a simple binary format used in the BitTorrent protocol.</li>
<li><a href="https://github.com/oxidecomputer/serde_tokenstream">Token streams</a>, for processing Rust procedural macro input.
<em>(deserialization only)</em></li>
<li><a href="https://docs.rs/serde_dynamo">DynamoDB Items</a>, the format used by <a href="https://docs.rs/rusoto_dynamodb">rusoto_dynamodb</a> to transfer data to
and from DynamoDB.</li>
<li><a href="https://github.com/Canop/deser-hjson">Hjson</a>, a syntax extension to JSON designed around human reading and
editing. <em>(deserialization only)</em></li>
<li><a href="https://docs.rs/csv">CSV</a>, Comma-separated values is a tabular text file format.</li>
</ul>
</div></details><h2 id="modules" class="section-header">Modules<a href="#modules" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="mod" href="de/index.html" title="mod serde::de">de</a></div><div class="desc docblock-short">Generic data structure deserialization framework.</div></li><li><div class="item-name"><a class="mod" href="ser/index.html" title="mod serde::ser">ser</a></div><div class="desc docblock-short">Generic data structure serialization framework.</div></li></ul><h2 id="macros" class="section-header">Macros<a href="#macros" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="macro" href="macro.forward_to_deserialize_any.html" title="macro serde::forward_to_deserialize_any">forward_to_deserialize_any</a></div><div class="desc docblock-short">Helper macro when implementing the <code>Deserializer</code> part of a new data format
for Serde.</div></li></ul><h2 id="traits" class="section-header">Traits<a href="#traits" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="trait" href="trait.Deserialize.html" title="trait serde::Deserialize">Deserialize</a></div><div class="desc docblock-short">A <strong>data structure</strong> that can be deserialized from any data format supported
by Serde.</div></li><li><div class="item-name"><a class="trait" href="trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a></div><div class="desc docblock-short">A <strong>data format</strong> that can deserialize any data structure supported by
Serde.</div></li><li><div class="item-name"><a class="trait" href="trait.Serialize.html" title="trait serde::Serialize">Serialize</a></div><div class="desc docblock-short">A <strong>data structure</strong> that can be serialized into any data format supported
by Serde.</div></li><li><div class="item-name"><a class="trait" href="trait.Serializer.html" title="trait serde::Serializer">Serializer</a></div><div class="desc docblock-short">A <strong>data format</strong> that can serialize any data structure supported by Serde.</div></li></ul><h2 id="derives" class="section-header">Derive Macros<a href="#derives" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="derive" href="derive.Deserialize.html" title="derive serde::Deserialize">Deserialize</a></div><div class="desc docblock-short">Derive macro available if serde is built with <code>features = [&quot;derive&quot;]</code>.</div></li><li><div class="item-name"><a class="derive" href="derive.Serialize.html" title="derive serde::Serialize">Serialize</a></div><div class="desc docblock-short">Derive macro available if serde is built with <code>features = [&quot;derive&quot;]</code>.</div></li></ul></section></div></main></body></html>