| <!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="This trait represents a visitor that walks through a deserializer."><meta name="keywords" content="rust, rustlang, rust-lang, Visitor"><title>Visitor in serde::de - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link 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href="../../serde/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../serde/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">Visitor</a></h2><div class="sidebar-elems"><section><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.Value">Value</a></li></ul><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.expecting">expecting</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.visit_bool">visit_bool</a></li><li><a href="#method.visit_borrowed_bytes">visit_borrowed_bytes</a></li><li><a href="#method.visit_borrowed_str">visit_borrowed_str</a></li><li><a href="#method.visit_byte_buf">visit_byte_buf</a></li><li><a href="#method.visit_bytes">visit_bytes</a></li><li><a href="#method.visit_char">visit_char</a></li><li><a href="#method.visit_enum">visit_enum</a></li><li><a href="#method.visit_f32">visit_f32</a></li><li><a href="#method.visit_f64">visit_f64</a></li><li><a href="#method.visit_i128">visit_i128</a></li><li><a href="#method.visit_i16">visit_i16</a></li><li><a href="#method.visit_i32">visit_i32</a></li><li><a href="#method.visit_i64">visit_i64</a></li><li><a href="#method.visit_i8">visit_i8</a></li><li><a href="#method.visit_map">visit_map</a></li><li><a href="#method.visit_newtype_struct">visit_newtype_struct</a></li><li><a href="#method.visit_none">visit_none</a></li><li><a href="#method.visit_seq">visit_seq</a></li><li><a href="#method.visit_some">visit_some</a></li><li><a href="#method.visit_str">visit_str</a></li><li><a href="#method.visit_string">visit_string</a></li><li><a href="#method.visit_u128">visit_u128</a></li><li><a href="#method.visit_u16">visit_u16</a></li><li><a href="#method.visit_u32">visit_u32</a></li><li><a href="#method.visit_u64">visit_u64</a></li><li><a href="#method.visit_u8">visit_u8</a></li><li><a href="#method.visit_unit">visit_unit</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In serde::de</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Trait <a href="../index.html">serde</a>::<wbr><a href="index.html">de</a>::<wbr><a class="trait" href="#">Visitor</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../src/serde/de/mod.rs.html#1282-1684">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust trait"><code>pub trait Visitor<'de>: Sized { |
| type <a href="#associatedtype.Value" class="associatedtype">Value</a>; |
| |
| <details class="rustdoc-toggle type-contents-toggle"><summary class="hideme"><span>Show 28 methods</span></summary> fn <a href="#tymethod.expecting" class="fnname">expecting</a>(&self, formatter: &mut Formatter<'_>) -> Result; |
| |
| fn <a href="#method.visit_bool" class="fnname">visit_bool</a><E>(self, v: bool) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_i8" class="fnname">visit_i8</a><E>(self, v: i8) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_i16" class="fnname">visit_i16</a><E>(self, v: i16) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_i32" class="fnname">visit_i32</a><E>(self, v: i32) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_i64" class="fnname">visit_i64</a><E>(self, v: i64) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_i128" class="fnname">visit_i128</a><E>(self, v: i128) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_u8" class="fnname">visit_u8</a><E>(self, v: u8) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_u16" class="fnname">visit_u16</a><E>(self, v: u16) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_u32" class="fnname">visit_u32</a><E>(self, v: u32) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_u64" class="fnname">visit_u64</a><E>(self, v: u64) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_u128" class="fnname">visit_u128</a><E>(self, v: u128) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_f32" class="fnname">visit_f32</a><E>(self, v: f32) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_f64" class="fnname">visit_f64</a><E>(self, v: f64) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_char" class="fnname">visit_char</a><E>(self, v: char) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_str" class="fnname">visit_str</a><E>(self, v: &str) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_borrowed_str" class="fnname">visit_borrowed_str</a><E>(self, v: &'de str) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_string" class="fnname">visit_string</a><E>(self, v: String) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_bytes" class="fnname">visit_bytes</a><E>(self, v: &[u8]) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_borrowed_bytes" class="fnname">visit_borrowed_bytes</a><E>(self, v: &'de [u8]) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_byte_buf" class="fnname">visit_byte_buf</a><E>(self, v: Vec<u8>) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_none" class="fnname">visit_none</a><E>(self) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_some" class="fnname">visit_some</a><D>(self, deserializer: D) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, D::<a class="associatedtype" href="../trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>><br> <span class="where">where<br> D: <a class="trait" href="../trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_unit" class="fnname">visit_unit</a><E>(self) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><br> <span class="where">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_newtype_struct" class="fnname">visit_newtype_struct</a><D>(<br> self,<br> deserializer: D<br> ) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, D::<a class="associatedtype" href="../trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>><br> <span class="where">where<br> D: <a class="trait" href="../trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_seq" class="fnname">visit_seq</a><A>(self, seq: A) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, A::<a class="associatedtype" href="trait.SeqAccess.html#associatedtype.Error" title="type serde::de::SeqAccess::Error">Error</a>><br> <span class="where">where<br> A: <a class="trait" href="trait.SeqAccess.html" title="trait serde::de::SeqAccess">SeqAccess</a><'de></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_map" class="fnname">visit_map</a><A>(self, map: A) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, A::<a class="associatedtype" href="trait.MapAccess.html#associatedtype.Error" title="type serde::de::MapAccess::Error">Error</a>><br> <span class="where">where<br> A: <a class="trait" href="trait.MapAccess.html" title="trait serde::de::MapAccess">MapAccess</a><'de></span>, |
| { ... } |
| <span class="item-spacer"></span> fn <a href="#method.visit_enum" class="fnname">visit_enum</a><A>(self, data: A) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, A::<a class="associatedtype" href="trait.EnumAccess.html#associatedtype.Error" title="type serde::de::EnumAccess::Error">Error</a>><br> <span class="where">where<br> A: <a class="trait" href="trait.EnumAccess.html" title="trait serde::de::EnumAccess">EnumAccess</a><'de></span>, |
| { ... } |
| </details>}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This trait represents a visitor that walks through a deserializer.</p> |
| <h2 id="lifetime"><a href="#lifetime">Lifetime</a></h2> |
| <p>The <code>'de</code> lifetime of this trait is the requirement for lifetime of data |
| that may be borrowed by <code>Self::Value</code>. See the page <a href="https://serde.rs/lifetimes.html">Understanding |
| deserializer lifetimes</a> for a more detailed explanation of these lifetimes.</p> |
| <h2 id="example"><a href="#example">Example</a></h2> |
| <div class="example-wrap edition"><div class='tooltip' data-edition="2018">ⓘ</div><pre class="rust rust-example-rendered"><code><span class="doccomment">/// A visitor that deserializes a long string - a string containing at least |
| /// some minimum number of bytes. |
| </span><span class="kw">struct </span>LongString { |
| min: usize, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'de</span>> Visitor<<span class="lifetime">'de</span>> <span class="kw">for </span>LongString { |
| <span class="kw">type </span>Value = String; |
| |
| <span class="kw">fn </span>expecting(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="macro">write!</span>(formatter, <span class="string">"a string containing at least {} bytes"</span>, <span class="self">self</span>.min) |
| } |
| |
| <span class="kw">fn </span>visit_str<E>(<span class="self">self</span>, s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>::Value, E> |
| <span class="kw">where |
| </span>E: de::Error, |
| { |
| <span class="kw">if </span>s.len() >= <span class="self">self</span>.min { |
| <span class="prelude-val">Ok</span>(s.to_owned()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(de::Error::invalid_value(Unexpected::Str(s), <span class="kw-2">&</span><span class="self">self</span>)) |
| } |
| } |
| }</code></pre></div> |
| </div></details><h2 id="required-associated-types" class="small-section-header">Required Associated Types<a href="#required-associated-types" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle method-toggle" open><summary><section id="associatedtype.Value" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1284">source</a><h4 class="code-header">type <a href="#associatedtype.Value" class="associatedtype">Value</a></h4></section></summary><div class="docblock"><p>The value produced by this visitor.</p> |
| </div></details></div><h2 id="required-methods" class="small-section-header">Required Methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle method-toggle" open><summary><section id="tymethod.expecting" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1308">source</a><h4 class="code-header">fn <a href="#tymethod.expecting" class="fnname">expecting</a>(&self, formatter: &mut Formatter<'_>) -> Result</h4></section></summary><div class="docblock"><p>Format a message stating what data this Visitor expects to receive.</p> |
| <p>This is used in error messages. The message should complete the sentence |
| “This Visitor expects to receive …”, for example the message could be |
| “an integer between 0 and 64”. The message should not be capitalized and |
| should not end with a period.</p> |
| |
| <div class="example-wrap edition"><div class='tooltip' data-edition="2018">ⓘ</div><pre class="rust rust-example-rendered"><code><span class="kw">fn </span>expecting(<span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="macro">write!</span>(formatter, <span class="string">"an integer between 0 and {}"</span>, <span class="self">self</span>.max) |
| }</code></pre></div> |
| </div></details></div><h2 id="provided-methods" class="small-section-header">Provided Methods<a href="#provided-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_bool" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1313-1318">source</a><h4 class="code-header">fn <a href="#method.visit_bool" class="fnname">visit_bool</a><E>(self, v: bool) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a boolean.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_i8" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1325-1330">source</a><h4 class="code-header">fn <a href="#method.visit_i8" class="fnname">visit_i8</a><E>(self, v: i8) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains an <code>i8</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_i64"><code>visit_i64</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_i16" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1337-1342">source</a><h4 class="code-header">fn <a href="#method.visit_i16" class="fnname">visit_i16</a><E>(self, v: i16) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains an <code>i16</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_i64"><code>visit_i64</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_i32" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1349-1354">source</a><h4 class="code-header">fn <a href="#method.visit_i32" class="fnname">visit_i32</a><E>(self, v: i32) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains an <code>i32</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_i64"><code>visit_i64</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_i64" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1359-1364">source</a><h4 class="code-header">fn <a href="#method.visit_i64" class="fnname">visit_i64</a><E>(self, v: i64) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains an <code>i64</code>.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_i128" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1371-1379">source</a><h4 class="code-header">fn <a href="#method.visit_i128" class="fnname">visit_i128</a><E>(self, v: i128) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a <code>i128</code>.</p> |
| <p>This method is available only on Rust compiler versions >=1.26. The |
| default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_u8" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1387-1392">source</a><h4 class="code-header">fn <a href="#method.visit_u8" class="fnname">visit_u8</a><E>(self, v: u8) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a <code>u8</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_u64"><code>visit_u64</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_u16" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1399-1404">source</a><h4 class="code-header">fn <a href="#method.visit_u16" class="fnname">visit_u16</a><E>(self, v: u16) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a <code>u16</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_u64"><code>visit_u64</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_u32" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1411-1416">source</a><h4 class="code-header">fn <a href="#method.visit_u32" class="fnname">visit_u32</a><E>(self, v: u32) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a <code>u32</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_u64"><code>visit_u64</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_u64" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1421-1426">source</a><h4 class="code-header">fn <a href="#method.visit_u64" class="fnname">visit_u64</a><E>(self, v: u64) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a <code>u64</code>.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_u128" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1433-1441">source</a><h4 class="code-header">fn <a href="#method.visit_u128" class="fnname">visit_u128</a><E>(self, v: u128) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a <code>u128</code>.</p> |
| <p>This method is available only on Rust compiler versions >=1.26. The |
| default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_f32" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1449-1454">source</a><h4 class="code-header">fn <a href="#method.visit_f32" class="fnname">visit_f32</a><E>(self, v: f32) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains an <code>f32</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_f64"><code>visit_f64</code></a>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_f64" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1459-1464">source</a><h4 class="code-header">fn <a href="#method.visit_f64" class="fnname">visit_f64</a><E>(self, v: f64) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains an <code>f64</code>.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_char" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1473-1478">source</a><h4 class="code-header">fn <a href="#method.visit_char" class="fnname">visit_char</a><E>(self, v: char) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a <code>char</code>.</p> |
| <p>The default implementation forwards to <a href="#method.visit_str"><code>visit_str</code></a> as a one-character |
| string.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_str" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1491-1496">source</a><h4 class="code-header">fn <a href="#method.visit_str" class="fnname">visit_str</a><E>(self, v: &str) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a string. The lifetime of the string is ephemeral and |
| it may be destroyed after this method returns.</p> |
| <p>This method allows the <code>Deserializer</code> to avoid a copy by retaining |
| ownership of any buffered data. <code>Deserialize</code> implementations that do |
| not benefit from taking ownership of <code>String</code> data should indicate that |
| to the deserializer by using <code>Deserializer::deserialize_str</code> rather than |
| <code>Deserializer::deserialize_string</code>.</p> |
| <p>It is never correct to implement <code>visit_string</code> without implementing |
| <code>visit_str</code>. Implement neither, both, or just <code>visit_str</code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_borrowed_str" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1508-1513">source</a><h4 class="code-header">fn <a href="#method.visit_borrowed_str" class="fnname">visit_borrowed_str</a><E>(self, v: &'de str) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a string that lives at least as long as the |
| <code>Deserializer</code>.</p> |
| <p>This enables zero-copy deserialization of strings in some formats. For |
| example JSON input containing the JSON string <code>"borrowed"</code> can be |
| deserialized with zero copying into a <code>&'a str</code> as long as the input |
| data outlives <code>'a</code>.</p> |
| <p>The default implementation forwards to <code>visit_str</code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_string" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1532-1537">source</a><h4 class="code-header">fn <a href="#method.visit_string" class="fnname">visit_string</a><E>(self, v: String) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a string and ownership of the string is being given |
| to the <code>Visitor</code>.</p> |
| <p>This method allows the <code>Visitor</code> to avoid a copy by taking ownership of |
| a string created by the <code>Deserializer</code>. <code>Deserialize</code> implementations |
| that benefit from taking ownership of <code>String</code> data should indicate that |
| to the deserializer by using <code>Deserializer::deserialize_string</code> rather |
| than <code>Deserializer::deserialize_str</code>, although not every deserializer |
| will honor such a request.</p> |
| <p>It is never correct to implement <code>visit_string</code> without implementing |
| <code>visit_str</code>. Implement neither, both, or just <code>visit_str</code>.</p> |
| <p>The default implementation forwards to <code>visit_str</code> and then drops the |
| <code>String</code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_bytes" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1550-1556">source</a><h4 class="code-header">fn <a href="#method.visit_bytes" class="fnname">visit_bytes</a><E>(self, v: &[u8]) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a byte array. The lifetime of the byte array is |
| ephemeral and it may be destroyed after this method returns.</p> |
| <p>This method allows the <code>Deserializer</code> to avoid a copy by retaining |
| ownership of any buffered data. <code>Deserialize</code> implementations that do |
| not benefit from taking ownership of <code>Vec<u8></code> data should indicate that |
| to the deserializer by using <code>Deserializer::deserialize_bytes</code> rather |
| than <code>Deserializer::deserialize_byte_buf</code>.</p> |
| <p>It is never correct to implement <code>visit_byte_buf</code> without implementing |
| <code>visit_bytes</code>. Implement neither, both, or just <code>visit_bytes</code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_borrowed_bytes" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1567-1572">source</a><h4 class="code-header">fn <a href="#method.visit_borrowed_bytes" class="fnname">visit_borrowed_bytes</a><E>(self, v: &'de [u8]) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a byte array that lives at least as long as the |
| <code>Deserializer</code>.</p> |
| <p>This enables zero-copy deserialization of bytes in some formats. For |
| example Postcard data containing bytes can be deserialized with zero |
| copying into a <code>&'a [u8]</code> as long as the input data outlives <code>'a</code>.</p> |
| <p>The default implementation forwards to <code>visit_bytes</code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_byte_buf" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1591-1596">source</a><h4 class="code-header">fn <a href="#method.visit_byte_buf" class="fnname">visit_byte_buf</a><E>(self, v: Vec<u8>) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a byte array and ownership of the byte array is being |
| given to the <code>Visitor</code>.</p> |
| <p>This method allows the <code>Visitor</code> to avoid a copy by taking ownership of |
| a byte buffer created by the <code>Deserializer</code>. <code>Deserialize</code> |
| implementations that benefit from taking ownership of <code>Vec<u8></code> data |
| should indicate that to the deserializer by using |
| <code>Deserializer::deserialize_byte_buf</code> rather than |
| <code>Deserializer::deserialize_bytes</code>, although not every deserializer will |
| honor such a request.</p> |
| <p>It is never correct to implement <code>visit_byte_buf</code> without implementing |
| <code>visit_bytes</code>. Implement neither, both, or just <code>visit_bytes</code>.</p> |
| <p>The default implementation forwards to <code>visit_bytes</code> and then drops the |
| <code>Vec<u8></code>.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_none" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1601-1606">source</a><h4 class="code-header">fn <a href="#method.visit_none" class="fnname">visit_none</a><E>(self) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains an optional that is absent.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_some" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1611-1617">source</a><h4 class="code-header">fn <a href="#method.visit_some" class="fnname">visit_some</a><D>(self, deserializer: D) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, D::<a class="associatedtype" href="../trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>><span class="where fmt-newline">where<br> D: <a class="trait" href="../trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de>,</span></h4></section></summary><div class="docblock"><p>The input contains an optional that is present.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_unit" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1622-1627">source</a><h4 class="code-header">fn <a href="#method.visit_unit" class="fnname">visit_unit</a><E>(self) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, E><span class="where fmt-newline">where<br> E: <a class="trait" href="trait.Error.html" title="trait serde::de::Error">Error</a>,</span></h4></section></summary><div class="docblock"><p>The input contains a unit <code>()</code>.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_newtype_struct" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1635-1641">source</a><h4 class="code-header">fn <a href="#method.visit_newtype_struct" class="fnname">visit_newtype_struct</a><D>(<br> self,<br> deserializer: D<br>) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, D::<a class="associatedtype" href="../trait.Deserializer.html#associatedtype.Error" title="type serde::Deserializer::Error">Error</a>><span class="where fmt-newline">where<br> D: <a class="trait" href="../trait.Deserializer.html" title="trait serde::Deserializer">Deserializer</a><'de>,</span></h4></section></summary><div class="docblock"><p>The input contains a newtype struct.</p> |
| <p>The content of the newtype struct may be read from the given |
| <code>Deserializer</code>.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_seq" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1646-1652">source</a><h4 class="code-header">fn <a href="#method.visit_seq" class="fnname">visit_seq</a><A>(self, seq: A) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, A::<a class="associatedtype" href="trait.SeqAccess.html#associatedtype.Error" title="type serde::de::SeqAccess::Error">Error</a>><span class="where fmt-newline">where<br> A: <a class="trait" href="trait.SeqAccess.html" title="trait serde::de::SeqAccess">SeqAccess</a><'de>,</span></h4></section></summary><div class="docblock"><p>The input contains a sequence of elements.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_map" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1657-1663">source</a><h4 class="code-header">fn <a href="#method.visit_map" class="fnname">visit_map</a><A>(self, map: A) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, A::<a class="associatedtype" href="trait.MapAccess.html#associatedtype.Error" title="type serde::de::MapAccess::Error">Error</a>><span class="where fmt-newline">where<br> A: <a class="trait" href="trait.MapAccess.html" title="trait serde::de::MapAccess">MapAccess</a><'de>,</span></h4></section></summary><div class="docblock"><p>The input contains a key-value map.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.visit_enum" class="method has-srclink"><a class="srclink rightside" href="../../src/serde/de/mod.rs.html#1668-1674">source</a><h4 class="code-header">fn <a href="#method.visit_enum" class="fnname">visit_enum</a><A>(self, data: A) -> Result<Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Value" title="type serde::de::Visitor::Value">Value</a>, A::<a class="associatedtype" href="trait.EnumAccess.html#associatedtype.Error" title="type serde::de::EnumAccess::Error">Error</a>><span class="where fmt-newline">where<br> A: <a class="trait" href="trait.EnumAccess.html" title="trait serde::de::EnumAccess">EnumAccess</a><'de>,</span></h4></section></summary><div class="docblock"><p>The input contains an enum.</p> |
| <p>The default implementation fails with a type error.</p> |
| </div></details></div><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div id="implementors-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Visitor%3C%27de%3E-for-IgnoredAny" class="impl has-srclink"><a class="srclink rightside" href="../../src/serde/de/ignored_any.rs.html#114-233">source</a><a href="#impl-Visitor%3C%27de%3E-for-IgnoredAny" class="anchor"></a><h3 class="code-header">impl<'de> <a class="trait" href="trait.Visitor.html" title="trait serde::de::Visitor">Visitor</a><'de> for <a class="struct" href="struct.IgnoredAny.html" title="struct serde::de::IgnoredAny">IgnoredAny</a></h3></section></summary><div class="impl-items"><section id="associatedtype.Value-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Value-1" class="anchor"></a><h4 class="code-header">type <a href="#associatedtype.Value" class="associatedtype">Value</a> = <a class="struct" href="struct.IgnoredAny.html" title="struct serde::de::IgnoredAny">IgnoredAny</a></h4></section></div></details></div><script src="../../implementors/serde/de/trait.Visitor.js" async></script></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="serde" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
