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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="Helper macro when implementing the `Deserializer` part of a new data format for Serde."><title>forward_to_deserialize_any in serde - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-42caa33d.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="1.84.1 (e71f9a9a9 2025-01-27)" data-channel="1.84.1" data-search-js="search-92e6798f.js" data-settings-js="settings-0f613d39.js" ><script src="../static.files/storage-59e33391.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-044be391.svg"></head><body class="rustdoc macro"><!--[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">1.0.216</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="index.html">serde</a></span><h1>Macro <span class="macro">forward_to_deserialize_any</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/serde/macros.rs.html#111-119">Source</a> </span></div><pre class="rust item-decl"><code>macro_rules! forward_to_deserialize_any {
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(<$visitor:ident: Visitor<$lifetime:tt>> $($func:ident)*) => { ... };
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($($func:ident)*) => { ... };
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}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Helper macro when implementing the <code>Deserializer</code> part of a new data format
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for Serde.</p>
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<p>Some <a href="trait.Deserializer.html"><code>Deserializer</code></a> implementations for self-describing formats do not
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care what hint the <a href="de/trait.Visitor.html"><code>Visitor</code></a> gives them, they just want to blindly call
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the <a href="de/trait.Visitor.html"><code>Visitor</code></a> method corresponding to the data they can tell is in the
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input. This requires repetitive implementations of all the <a href="trait.Deserializer.html"><code>Deserializer</code></a>
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trait methods.</p>
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<div class="example-wrap edition"><a href="#" class="tooltip" title="This example runs with edition 2021">ⓘ</a><pre class="rust rust-example-rendered"><code><span class="attr">#[inline]
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</span><span class="kw">fn </span>deserialize_bool<V>(<span class="self">self</span>, visitor: V) -> <span class="prelude-ty">Result</span><V::Value, <span class="self">Self</span>::Error>
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<span class="kw">where
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</span>V: Visitor<<span class="lifetime">'de</span>>,
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{
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<span class="self">self</span>.deserialize_any(visitor)
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}</code></pre></div>
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<p>The <code>forward_to_deserialize_any!</code> macro implements these simple forwarding
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methods so that they forward directly to <a href="trait.Deserializer.html#tymethod.deserialize_any"><code>Deserializer::deserialize_any</code></a>.
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You can choose which methods to forward.</p>
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<div class="example-wrap edition"><a href="#" class="tooltip" title="This example runs with edition 2021">ⓘ</a><pre class="rust rust-example-rendered"><code><span class="kw">impl</span><<span class="lifetime">'de</span>> Deserializer<<span class="lifetime">'de</span>> <span class="kw">for </span>MyDeserializer {
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<span class="kw">fn </span>deserialize_any<V>(<span class="self">self</span>, visitor: V) -> <span class="prelude-ty">Result</span><V::Value, <span class="self">Self</span>::Error>
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<span class="kw">where
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</span>V: Visitor<<span class="lifetime">'de</span>>,
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{
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<span class="comment">/* ... */
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</span>}
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<span class="macro">forward_to_deserialize_any!</span> {
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bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
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bytes byte_buf option unit unit_struct newtype_struct seq tuple
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tuple_struct map <span class="kw">struct enum </span>identifier ignored_any
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}
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}</code></pre></div>
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<p>The macro assumes the convention that your <code>Deserializer</code> lifetime parameter
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is called <code>'de</code> and that the <code>Visitor</code> type parameters on each method are
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called <code>V</code>. A different type parameter and a different lifetime can be
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specified explicitly if necessary.</p>
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<div class="example-wrap edition"><a href="#" class="tooltip" title="This example runs with edition 2021">ⓘ</a><pre class="rust rust-example-rendered"><code><span class="macro">forward_to_deserialize_any!</span> {
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<W: Visitor<<span class="lifetime">'q</span>>>
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bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
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bytes byte_buf option unit unit_struct newtype_struct seq tuple
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tuple_struct map <span class="kw">struct enum </span>identifier ignored_any
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}</code></pre></div>
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</div></details></section></div></main></body></html> |