| <!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/http-body-0.4.5/src/combinators/map_err.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>map_err.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="../../../http_body/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="../../../http_body/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="kw">use </span><span class="kw">crate</span>::Body; |
| <span class="kw">use </span>pin_project_lite::pin_project; |
| <span class="kw">use </span>std::{ |
| any::type_name, |
| fmt, |
| pin::Pin, |
| task::{Context, Poll}, |
| }; |
| |
| <span class="macro">pin_project! </span>{ |
| <span class="doccomment">/// Body returned by the [`map_err`] combinator. |
| /// |
| /// [`map_err`]: crate::util::BodyExt::map_err |
| </span><span class="attribute">#[derive(Clone, Copy)] |
| </span><span class="kw">pub struct </span>MapErr<B, F> { |
| <span class="attribute">#[pin] |
| </span>inner: B, |
| f: F |
| } |
| } |
| |
| <span class="kw">impl</span><B, F> MapErr<B, F> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(body: B, f: F) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ inner: body, f } |
| } |
| |
| <span class="doccomment">/// Get a reference to the inner body |
| </span><span class="kw">pub fn </span>get_ref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>B { |
| <span class="kw-2">&</span><span class="self">self</span>.inner |
| } |
| |
| <span class="doccomment">/// Get a mutable reference to the inner body |
| </span><span class="kw">pub fn </span>get_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>B { |
| <span class="kw-2">&mut </span><span class="self">self</span>.inner |
| } |
| |
| <span class="doccomment">/// Get a pinned mutable reference to the inner body |
| </span><span class="kw">pub fn </span>get_pin_mut(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>) -> Pin<<span class="kw-2">&mut </span>B> { |
| <span class="self">self</span>.project().inner |
| } |
| |
| <span class="doccomment">/// Consume `self`, returning the inner body |
| </span><span class="kw">pub fn </span>into_inner(<span class="self">self</span>) -> B { |
| <span class="self">self</span>.inner |
| } |
| } |
| |
| <span class="kw">impl</span><B, F, E> Body <span class="kw">for </span>MapErr<B, F> |
| <span class="kw">where |
| </span>B: Body, |
| F: FnMut(B::Error) -> E, |
| { |
| <span class="kw">type </span>Data = B::Data; |
| <span class="kw">type </span>Error = E; |
| |
| <span class="kw">fn </span>poll_data( |
| <span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| ) -> Poll<<span class="prelude-ty">Option</span><<span class="prelude-ty">Result</span><<span class="self">Self</span>::Data, <span class="self">Self</span>::Error>>> { |
| <span class="kw">let </span>this = <span class="self">self</span>.project(); |
| <span class="kw">match </span>this.inner.poll_data(cx) { |
| Poll::Pending => Poll::Pending, |
| Poll::Ready(<span class="prelude-val">None</span>) => Poll::Ready(<span class="prelude-val">None</span>), |
| Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(data))) => Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(data))), |
| Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(err))) => Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>((this.f)(err)))), |
| } |
| } |
| |
| <span class="kw">fn </span>poll_trailers( |
| <span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| ) -> Poll<<span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><http::HeaderMap>, <span class="self">Self</span>::Error>> { |
| <span class="kw">let </span>this = <span class="self">self</span>.project(); |
| this.inner.poll_trailers(cx).map_err(this.f) |
| } |
| |
| <span class="kw">fn </span>is_end_stream(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.inner.is_end_stream() |
| } |
| |
| <span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">crate</span>::SizeHint { |
| <span class="self">self</span>.inner.size_hint() |
| } |
| } |
| |
| <span class="kw">impl</span><B, F> fmt::Debug <span class="kw">for </span>MapErr<B, F> |
| <span class="kw">where |
| </span>B: fmt::Debug, |
| { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| f.debug_struct(<span class="string">"MapErr"</span>) |
| .field(<span class="string">"inner"</span>, <span class="kw-2">&</span><span class="self">self</span>.inner) |
| .field(<span class="string">"f"</span>, <span class="kw-2">&</span>type_name::<F>()) |
| .finish() |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="http_body" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
