| <!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/tower-0.4.13/src/util/map_future.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>map_future.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="../../../tower/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="../../../tower/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>std::{ |
| fmt, |
| future::Future, |
| task::{Context, Poll}, |
| }; |
| <span class="kw">use </span>tower_layer::Layer; |
| <span class="kw">use </span>tower_service::Service; |
| |
| <span class="doccomment">/// [`Service`] returned by the [`map_future`] combinator. |
| /// |
| /// [`map_future`]: crate::util::ServiceExt::map_future |
| </span><span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>MapFuture<S, F> { |
| inner: S, |
| f: F, |
| } |
| |
| <span class="kw">impl</span><S, F> MapFuture<S, F> { |
| <span class="doccomment">/// Creates a new [`MapFuture`] service. |
| </span><span class="kw">pub fn </span>new(inner: S, f: F) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ inner, f } |
| } |
| |
| <span class="doccomment">/// Returns a new [`Layer`] that produces [`MapFuture`] services. |
| /// |
| /// This is a convenience function that simply calls [`MapFutureLayer::new`]. |
| /// |
| /// [`Layer`]: tower_layer::Layer |
| </span><span class="kw">pub fn </span>layer(f: F) -> MapFutureLayer<F> { |
| MapFutureLayer::new(f) |
| } |
| |
| <span class="doccomment">/// Get a reference to the inner service |
| </span><span class="kw">pub fn </span>get_ref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>S { |
| <span class="kw-2">&</span><span class="self">self</span>.inner |
| } |
| |
| <span class="doccomment">/// Get a mutable reference to the inner service |
| </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>S { |
| <span class="kw-2">&mut </span><span class="self">self</span>.inner |
| } |
| |
| <span class="doccomment">/// Consume `self`, returning the inner service |
| </span><span class="kw">pub fn </span>into_inner(<span class="self">self</span>) -> S { |
| <span class="self">self</span>.inner |
| } |
| } |
| |
| <span class="kw">impl</span><R, S, F, T, E, Fut> Service<R> <span class="kw">for </span>MapFuture<S, F> |
| <span class="kw">where |
| </span>S: Service<R>, |
| F: FnMut(S::Future) -> Fut, |
| E: From<S::Error>, |
| Fut: Future<Output = <span class="prelude-ty">Result</span><T, E>>, |
| { |
| <span class="kw">type </span>Response = T; |
| <span class="kw">type </span>Error = E; |
| <span class="kw">type </span>Future = Fut; |
| |
| <span class="kw">fn </span>poll_ready(<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="self">Self</span>::Error>> { |
| <span class="self">self</span>.inner.poll_ready(cx).map_err(From::from) |
| } |
| |
| <span class="kw">fn </span>call(<span class="kw-2">&mut </span><span class="self">self</span>, req: R) -> <span class="self">Self</span>::Future { |
| (<span class="self">self</span>.f)(<span class="self">self</span>.inner.call(req)) |
| } |
| } |
| |
| <span class="kw">impl</span><S, F> fmt::Debug <span class="kw">for </span>MapFuture<S, F> |
| <span class="kw">where |
| </span>S: 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<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_struct(<span class="string">"MapFuture"</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><span class="macro">format_args!</span>(<span class="string">"{}"</span>, std::any::type_name::<F>())) |
| .finish() |
| } |
| } |
| |
| <span class="doccomment">/// A [`Layer`] that produces a [`MapFuture`] service. |
| /// |
| /// [`Layer`]: tower_layer::Layer |
| </span><span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>MapFutureLayer<F> { |
| f: F, |
| } |
| |
| <span class="kw">impl</span><F> MapFutureLayer<F> { |
| <span class="doccomment">/// Creates a new [`MapFutureLayer`] layer. |
| </span><span class="kw">pub fn </span>new(f: F) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ f } |
| } |
| } |
| |
| <span class="kw">impl</span><S, F> Layer<S> <span class="kw">for </span>MapFutureLayer<F> |
| <span class="kw">where |
| </span>F: Clone, |
| { |
| <span class="kw">type </span>Service = MapFuture<S, F>; |
| |
| <span class="kw">fn </span>layer(<span class="kw-2">&</span><span class="self">self</span>, inner: S) -> <span class="self">Self</span>::Service { |
| MapFuture::new(inner, <span class="self">self</span>.f.clone()) |
| } |
| } |
| |
| <span class="kw">impl</span><F> fmt::Debug <span class="kw">for </span>MapFutureLayer<F> { |
| <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<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_struct(<span class="string">"MapFutureLayer"</span>) |
| .field(<span class="string">"f"</span>, <span class="kw-2">&</span><span class="macro">format_args!</span>(<span class="string">"{}"</span>, std::any::type_name::<F>())) |
| .finish() |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tower" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
