| <!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 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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script> |
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| </a><h2 class="location">Trait Visitor</h2><div class="sidebar-elems"><div class="block items"><h3 class="sidebar-title"><a href="#associated-types">Associated Types</a></h3><div class="sidebar-links"><a href="#associatedtype.Value">Value</a></div><h3 class="sidebar-title"><a href="#required-methods">Required Methods</a></h3><div class="sidebar-links"><a href="#tymethod.expecting">expecting</a></div><h3 class="sidebar-title"><a href="#provided-methods">Provided Methods</a></h3><div class="sidebar-links"><a href="#method.visit_bool">visit_bool</a><a href="#method.visit_borrowed_bytes">visit_borrowed_bytes</a><a href="#method.visit_borrowed_str">visit_borrowed_str</a><a href="#method.visit_byte_buf">visit_byte_buf</a><a href="#method.visit_bytes">visit_bytes</a><a href="#method.visit_char">visit_char</a><a href="#method.visit_enum">visit_enum</a><a href="#method.visit_f32">visit_f32</a><a href="#method.visit_f64">visit_f64</a><a href="#method.visit_i128">visit_i128</a><a href="#method.visit_i16">visit_i16</a><a href="#method.visit_i32">visit_i32</a><a href="#method.visit_i64">visit_i64</a><a href="#method.visit_i8">visit_i8</a><a href="#method.visit_map">visit_map</a><a href="#method.visit_newtype_struct">visit_newtype_struct</a><a href="#method.visit_none">visit_none</a><a href="#method.visit_seq">visit_seq</a><a href="#method.visit_some">visit_some</a><a href="#method.visit_str">visit_str</a><a href="#method.visit_string">visit_string</a><a href="#method.visit_u128">visit_u128</a><a href="#method.visit_u16">visit_u16</a><a href="#method.visit_u32">visit_u32</a><a href="#method.visit_u64">visit_u64</a><a href="#method.visit_u8">visit_u8</a><a href="#method.visit_unit">visit_unit</a></div><h3 class="sidebar-title"><a href="#implementors">Implementors</a></h3></div><h2 class="location">Other items in<br><a href="../index.html">serde</a>::<wbr><a href="index.html">de</a></h2><div id="sidebar-vars" data-name="Visitor" data-ty="trait" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../serde/index.html"><img class="rust-logo" src="../../rust-logo.png" alt="logo"></a><nav class="sub"><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><div> |
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| <h1 class="fqn"><span class="in-band">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></span></h1><span class="out-of-band"> |
| <a class="srclink" href="../../src/serde/de/mod.rs.html#1276-1674" title="goto source code">source</a> · |
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| <div class="docblock item-decl"><pre class="rust trait"><code>pub trait Visitor<'de>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> { |
| 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 <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a>; |
| |
| fn <a href="#method.visit_bool" class="fnname">visit_bool</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_i8" class="fnname">visit_i8</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_i16" class="fnname">visit_i16</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_i32" class="fnname">visit_i32</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_i64" class="fnname">visit_i64</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_i128" class="fnname">visit_i128</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_u8" class="fnname">visit_u8</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_u16" class="fnname">visit_u16</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_u32" class="fnname">visit_u32</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_u64" class="fnname">visit_u64</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_u128" class="fnname">visit_u128</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u128.html">u128</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_f32" class="fnname">visit_f32</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_f64" class="fnname">visit_f64</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_char" class="fnname">visit_char</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_str" class="fnname">visit_str</a><E>(self, v: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_borrowed_str" class="fnname">visit_borrowed_str</a><E>(self, v: &'de <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_string" class="fnname">visit_string</a><E>(self, v: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_bytes" class="fnname">visit_bytes</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_borrowed_bytes" class="fnname">visit_borrowed_bytes</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'de [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_byte_buf" class="fnname">visit_byte_buf</a><E>(self, v: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_none" class="fnname">visit_none</a><E>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_some" class="fnname">visit_some</a><D>(self, 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::<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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_unit" class="fnname">visit_unit</a><E>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_newtype_struct" class="fnname">visit_newtype_struct</a><D>(<br> self, <br> deserializer: D<br> ) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_seq" class="fnname">visit_seq</a><A>(self, seq: A) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_map" class="fnname">visit_map</a><A>(self, map: A) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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>, |
| { ... } |
| <div class="item-spacer"></div> fn <a href="#method.visit_enum" class="fnname">visit_enum</a><A>(self, data: A) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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" class="section-header"><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" class="section-header"><a href="#example">Example</a></h2> |
| <div class='information'><div class='tooltip edition' data-edition="2018">ⓘ</div></div><div class="example-wrap"><pre class="rust rust-example-rendered edition"><code><span class="doccomment">/// A visitor that deserializes a long string - a string containing at least</span> |
| <span class="doccomment">/// some minimum number of bytes.</span> |
| <span class="kw">struct</span> <span class="ident">LongString</span> { |
| <span class="ident">min</span>: <span class="ident">usize</span>, |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span> <span class="ident">Visitor</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span> <span class="kw">for</span> <span class="ident">LongString</span> { |
| <span class="kw">type</span> <span class="ident">Value</span> <span class="op">=</span> <span class="ident">String</span>; |
| |
| <span class="kw">fn</span> <span class="ident">expecting</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="macro">write!</span>(<span class="ident">formatter</span>, <span class="string">"a string containing at least {} bytes"</span>, <span class="self">self</span>.<span class="ident">min</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">visit_str</span><span class="op"><</span><span class="ident">E</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident"><span class="self">Self</span>::Value</span>, <span class="ident">E</span><span class="op">></span> |
| <span class="kw">where</span> |
| <span class="ident">E</span>: <span class="ident">de::Error</span>, |
| { |
| <span class="kw">if</span> <span class="ident">s</span>.<span class="ident">len</span>() <span class="op">></span><span class="op">=</span> <span class="self">self</span>.<span class="ident">min</span> { |
| <span class="prelude-val">Ok</span>(<span class="ident">s</span>.<span class="ident">to_owned</span>()) |
| } <span class="kw">else</span> { |
| <span class="prelude-val">Err</span>(<span class="ident">de::Error::invalid_value</span>(<span class="ident">Unexpected::Str</span>(<span class="ident">s</span>), <span class="kw-2">&</span><span class="self">self</span>)) |
| } |
| } |
| }</code></pre></div> |
| </div></details><h2 id="associated-types" class="small-section-header">Associated Types<a href="#associated-types" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="associatedtype.Value" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1278" title="goto source code">source</a></div><h4 class="code-header">type <a href="#associatedtype.Value" class="associatedtype">Value</a></h4></div></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" open><summary><div id="tymethod.expecting" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1302" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#tymethod.expecting" class="fnname">expecting</a>(&self, formatter: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></div></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='information'><div class='tooltip edition' data-edition="2018">ⓘ</div></div><div class="example-wrap"><pre class="rust rust-example-rendered edition"><code><span class="kw">fn</span> <span class="ident">expecting</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="macro">write!</span>(<span class="ident">formatter</span>, <span class="string">"an integer between 0 and {}"</span>, <span class="self">self</span>.<span class="ident">max</span>) |
| }</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" open><summary><div id="method.visit_bool" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1307-1312" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_bool" class="fnname">visit_bool</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_i8" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1319-1324" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_i8" class="fnname">visit_i8</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_i16" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1331-1336" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_i16" class="fnname">visit_i16</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_i32" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1343-1348" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_i32" class="fnname">visit_i32</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_i64" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1353-1358" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_i64" class="fnname">visit_i64</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_i128" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1365-1371" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_i128" class="fnname">visit_i128</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i128.html">i128</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_u8" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1379-1384" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_u8" class="fnname">visit_u8</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_u16" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1391-1396" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_u16" class="fnname">visit_u16</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_u32" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1403-1408" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_u32" class="fnname">visit_u32</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_u64" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1413-1418" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_u64" class="fnname">visit_u64</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_u128" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1425-1431" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_u128" class="fnname">visit_u128</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u128.html">u128</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_f32" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1439-1444" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_f32" class="fnname">visit_f32</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_f64" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1449-1454" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_f64" class="fnname">visit_f64</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_char" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1463-1468" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_char" class="fnname">visit_char</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_str" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1481-1486" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_str" class="fnname">visit_str</a><E>(self, v: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_borrowed_str" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1498-1503" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_borrowed_str" class="fnname">visit_borrowed_str</a><E>(self, v: &'de <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_string" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1522-1527" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_string" class="fnname">visit_string</a><E>(self, v: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_bytes" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1540-1546" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_bytes" class="fnname">visit_bytes</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_borrowed_bytes" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1557-1562" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_borrowed_bytes" class="fnname">visit_borrowed_bytes</a><E>(self, v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'de [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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 Bincode 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" open><summary><div id="method.visit_byte_buf" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1581-1586" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_byte_buf" class="fnname">visit_byte_buf</a><E>(self, v: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_none" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1591-1596" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_none" class="fnname">visit_none</a><E>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_some" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1601-1607" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_some" class="fnname">visit_some</a><D>(self, 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::<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></div></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" open><summary><div id="method.visit_unit" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1612-1617" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_unit" class="fnname">visit_unit</a><E>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_newtype_struct" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1625-1631" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_newtype_struct" class="fnname">visit_newtype_struct</a><D>(<br> self, <br> deserializer: D<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_seq" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1636-1642" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_seq" class="fnname">visit_seq</a><A>(self, seq: A) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_map" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1647-1653" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_map" class="fnname">visit_map</a><A>(self, map: A) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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" open><summary><div id="method.visit_enum" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/mod.rs.html#1658-1664" title="goto source code">source</a></div><h4 class="code-header">fn <a href="#method.visit_enum" class="fnname">visit_enum</a><A>(self, data: A) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><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></div></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 class="item-list" id="implementors-list"><details class="rustdoc-toggle implementors-toggle"><summary><div id="impl-Visitor%3C%27de%3E" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../../src/serde/de/ignored_any.rs.html#114-233" title="goto source code">source</a></div><a href="#impl-Visitor%3C%27de%3E" class="anchor"></a><h3 class="code-header in-band">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></div></summary><div class="impl-items"><div id="associatedtype.Value-1" class="type 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></div></div></details></div><script type="text/javascript" src="../../implementors/serde/de/trait.Visitor.js" async></script></section><section id="search" class="content hidden"></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="1.60.0-nightly (1bd4fdc94 2022-01-12)" ></div> |
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