| <!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="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/serde-1.0.163/src/ser/impossible.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>impossible.rs - source</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" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><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></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../serde/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><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="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="doccomment">//! This module contains `Impossible` serializer and its implementations. |
| |
| </span><span class="kw">use </span>lib::<span class="kw-2">*</span>; |
| |
| <span class="kw">use </span>ser::{ |
| <span class="self">self</span>, Serialize, SerializeMap, SerializeSeq, SerializeStruct, SerializeStructVariant, |
| SerializeTuple, SerializeTupleStruct, SerializeTupleVariant, |
| }; |
| |
| <span class="doccomment">/// Helper type for implementing a `Serializer` that does not support |
| /// serializing one of the compound types. |
| /// |
| /// This type cannot be instantiated, but implements every one of the traits |
| /// corresponding to the [`Serializer`] compound types: [`SerializeSeq`], |
| /// [`SerializeTuple`], [`SerializeTupleStruct`], [`SerializeTupleVariant`], |
| /// [`SerializeMap`], [`SerializeStruct`], and [`SerializeStructVariant`]. |
| /// |
| /// ```edition2018 |
| /// # use serde::ser::{Serializer, Impossible}; |
| /// # use serde::__private::doc::Error; |
| /// # |
| /// # struct MySerializer; |
| /// # |
| /// impl Serializer for MySerializer { |
| /// type Ok = (); |
| /// type Error = Error; |
| /// |
| /// type SerializeSeq = Impossible<(), Error>; |
| /// /* other associated types */ |
| /// |
| /// /// This data format does not support serializing sequences. |
| /// fn serialize_seq(self, |
| /// len: Option<usize>) |
| /// -> Result<Self::SerializeSeq, Error> { |
| /// // Given Impossible cannot be instantiated, the only |
| /// // thing we can do here is to return an error. |
| /// # stringify! { |
| /// Err(...) |
| /// # }; |
| /// # unimplemented!() |
| /// } |
| /// |
| /// /* other Serializer methods */ |
| /// # serde::__serialize_unimplemented! { |
| /// # bool i8 i16 i32 i64 u8 u16 u32 u64 f32 f64 char str bytes none some |
| /// # unit unit_struct unit_variant newtype_struct newtype_variant |
| /// # tuple tuple_struct tuple_variant map struct struct_variant |
| /// # } |
| /// } |
| /// ``` |
| /// |
| /// [`Serializer`]: trait.Serializer.html |
| /// [`SerializeSeq`]: trait.SerializeSeq.html |
| /// [`SerializeTuple`]: trait.SerializeTuple.html |
| /// [`SerializeTupleStruct`]: trait.SerializeTupleStruct.html |
| /// [`SerializeTupleVariant`]: trait.SerializeTupleVariant.html |
| /// [`SerializeMap`]: trait.SerializeMap.html |
| /// [`SerializeStruct`]: trait.SerializeStruct.html |
| /// [`SerializeStructVariant`]: trait.SerializeStructVariant.html |
| </span><span class="kw">pub struct </span>Impossible<<span class="prelude-val">Ok</span>, Error> { |
| void: Void, |
| ok: PhantomData<<span class="prelude-val">Ok</span>>, |
| error: PhantomData<Error>, |
| } |
| |
| <span class="kw">enum </span>Void {} |
| |
| <span class="kw">impl</span><<span class="prelude-val">Ok</span>, Error> SerializeSeq <span class="kw">for </span>Impossible<<span class="prelude-val">Ok</span>, Error> |
| <span class="kw">where |
| </span>Error: ser::Error, |
| { |
| <span class="kw">type </span><span class="prelude-val">Ok </span>= <span class="prelude-val">Ok</span>; |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>serialize_element<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= value; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>end(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><<span class="prelude-val">Ok</span>, Error> { |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="prelude-val">Ok</span>, Error> SerializeTuple <span class="kw">for </span>Impossible<<span class="prelude-val">Ok</span>, Error> |
| <span class="kw">where |
| </span>Error: ser::Error, |
| { |
| <span class="kw">type </span><span class="prelude-val">Ok </span>= <span class="prelude-val">Ok</span>; |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>serialize_element<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= value; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>end(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><<span class="prelude-val">Ok</span>, Error> { |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="prelude-val">Ok</span>, Error> SerializeTupleStruct <span class="kw">for </span>Impossible<<span class="prelude-val">Ok</span>, Error> |
| <span class="kw">where |
| </span>Error: ser::Error, |
| { |
| <span class="kw">type </span><span class="prelude-val">Ok </span>= <span class="prelude-val">Ok</span>; |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>serialize_field<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= value; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>end(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><<span class="prelude-val">Ok</span>, Error> { |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="prelude-val">Ok</span>, Error> SerializeTupleVariant <span class="kw">for </span>Impossible<<span class="prelude-val">Ok</span>, Error> |
| <span class="kw">where |
| </span>Error: ser::Error, |
| { |
| <span class="kw">type </span><span class="prelude-val">Ok </span>= <span class="prelude-val">Ok</span>; |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>serialize_field<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= value; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>end(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><<span class="prelude-val">Ok</span>, Error> { |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="prelude-val">Ok</span>, Error> SerializeMap <span class="kw">for </span>Impossible<<span class="prelude-val">Ok</span>, Error> |
| <span class="kw">where |
| </span>Error: ser::Error, |
| { |
| <span class="kw">type </span><span class="prelude-val">Ok </span>= <span class="prelude-val">Ok</span>; |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>serialize_key<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= key; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>serialize_value<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, value: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= value; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>end(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><<span class="prelude-val">Ok</span>, Error> { |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="prelude-val">Ok</span>, Error> SerializeStruct <span class="kw">for </span>Impossible<<span class="prelude-val">Ok</span>, Error> |
| <span class="kw">where |
| </span>Error: ser::Error, |
| { |
| <span class="kw">type </span><span class="prelude-val">Ok </span>= <span class="prelude-val">Ok</span>; |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>serialize_field<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span><span class="lifetime">'static </span>str, value: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= key; |
| <span class="kw">let _ </span>= value; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>end(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><<span class="prelude-val">Ok</span>, Error> { |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="prelude-val">Ok</span>, Error> SerializeStructVariant <span class="kw">for </span>Impossible<<span class="prelude-val">Ok</span>, Error> |
| <span class="kw">where |
| </span>Error: ser::Error, |
| { |
| <span class="kw">type </span><span class="prelude-val">Ok </span>= <span class="prelude-val">Ok</span>; |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>serialize_field<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span><span class="lifetime">'static </span>str, value: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Result</span><(), Error> |
| <span class="kw">where |
| </span>T: Serialize, |
| { |
| <span class="kw">let _ </span>= key; |
| <span class="kw">let _ </span>= value; |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| |
| <span class="kw">fn </span>end(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><<span class="prelude-val">Ok</span>, Error> { |
| <span class="kw">match </span><span class="self">self</span>.void {} |
| } |
| } |
| </code></pre></div> |
| </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> |
