| <!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/ready.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ready.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, marker::PhantomData}; |
| |
| <span class="kw">use </span>futures_core::ready; |
| <span class="kw">use </span>std::{ |
| future::Future, |
| pin::Pin, |
| task::{Context, Poll}, |
| }; |
| <span class="kw">use </span>tower_service::Service; |
| |
| <span class="doccomment">/// A [`Future`] that yields the service when it is ready to accept a request. |
| /// |
| /// [`ReadyOneshot`] values are produced by [`ServiceExt::ready_oneshot`]. |
| /// |
| /// [`ServiceExt::ready_oneshot`]: crate::util::ServiceExt::ready_oneshot |
| </span><span class="kw">pub struct </span>ReadyOneshot<T, Request> { |
| inner: <span class="prelude-ty">Option</span><T>, |
| _p: PhantomData<<span class="kw">fn</span>() -> Request>, |
| } |
| |
| <span class="comment">// Safety: This is safe because `Services`'s are always `Unpin`. |
| </span><span class="kw">impl</span><T, Request> Unpin <span class="kw">for </span>ReadyOneshot<T, Request> {} |
| |
| <span class="kw">impl</span><T, Request> ReadyOneshot<T, Request> |
| <span class="kw">where |
| </span>T: Service<Request>, |
| { |
| <span class="attribute">#[allow(missing_docs)] |
| </span><span class="kw">pub fn </span>new(service: T) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| inner: <span class="prelude-val">Some</span>(service), |
| _p: PhantomData, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T, Request> Future <span class="kw">for </span>ReadyOneshot<T, Request> |
| <span class="kw">where |
| </span>T: Service<Request>, |
| { |
| <span class="kw">type </span>Output = <span class="prelude-ty">Result</span><T, T::Error>; |
| |
| <span class="kw">fn </span>poll(<span class="kw-2">mut </span><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="self">Self</span>::Output> { |
| <span class="macro">ready!</span>(<span class="self">self |
| </span>.inner |
| .as_mut() |
| .expect(<span class="string">"poll after Poll::Ready"</span>) |
| .poll_ready(cx))<span class="question-mark">?</span>; |
| |
| Poll::Ready(<span class="prelude-val">Ok</span>(<span class="self">self</span>.inner.take().expect(<span class="string">"poll after Poll::Ready"</span>))) |
| } |
| } |
| |
| <span class="kw">impl</span><T, Request> fmt::Debug <span class="kw">for </span>ReadyOneshot<T, Request> |
| <span class="kw">where |
| </span>T: 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">"ReadyOneshot"</span>) |
| .field(<span class="string">"inner"</span>, <span class="kw-2">&</span><span class="self">self</span>.inner) |
| .finish() |
| } |
| } |
| |
| <span class="doccomment">/// A future that yields a mutable reference to the service when it is ready to accept a request. |
| /// |
| /// [`Ready`] values are produced by [`ServiceExt::ready`]. |
| /// |
| /// [`ServiceExt::ready`]: crate::util::ServiceExt::ready |
| </span><span class="kw">pub struct </span>Ready<<span class="lifetime">'a</span>, T, Request>(ReadyOneshot<<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T, Request>); |
| |
| <span class="doccomment">/// A future that yields a mutable reference to the service when it is ready to accept a request. |
| /// |
| /// [`ReadyAnd`] values are produced by [`ServiceExt::ready_and`]. |
| /// |
| /// [`ServiceExt::ready_and`]: crate::util::ServiceExt::ready_and |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.6"</span>, note = <span class="string">"Please use the Ready future instead"</span>)] |
| </span><span class="kw">pub type </span>ReadyAnd<<span class="lifetime">'a</span>, T, Request> = Ready<<span class="lifetime">'a</span>, T, Request>; |
| |
| <span class="comment">// Safety: This is safe for the same reason that the impl for ReadyOneshot is safe. |
| </span><span class="kw">impl</span><<span class="lifetime">'a</span>, T, Request> Unpin <span class="kw">for </span>Ready<<span class="lifetime">'a</span>, T, Request> {} |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T, Request> Ready<<span class="lifetime">'a</span>, T, Request> |
| <span class="kw">where |
| </span>T: Service<Request>, |
| { |
| <span class="attribute">#[allow(missing_docs)] |
| </span><span class="kw">pub fn </span>new(service: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T) -> <span class="self">Self </span>{ |
| <span class="self">Self</span>(ReadyOneshot::new(service)) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T, Request> Future <span class="kw">for </span>Ready<<span class="lifetime">'a</span>, T, Request> |
| <span class="kw">where |
| </span>T: Service<Request>, |
| { |
| <span class="kw">type </span>Output = <span class="prelude-ty">Result</span><<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T, T::Error>; |
| |
| <span class="kw">fn </span>poll(<span class="kw-2">mut </span><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="self">Self</span>::Output> { |
| Pin::new(<span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0</span>).poll(cx) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T, Request> fmt::Debug <span class="kw">for </span>Ready<<span class="lifetime">'a</span>, T, Request> |
| <span class="kw">where |
| </span>T: 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_tuple(<span class="string">"Ready"</span>).field(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>).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> |