| <!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/async-trait-0.1.68/src/args.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>args.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="../../async_trait/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="../../async_trait/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> |
| <span id="2">2</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span>proc_macro2::Span; |
| <span class="kw">use </span>syn::parse::{Error, Parse, ParseStream, <span class="prelude-ty">Result</span>}; |
| <span class="kw">use </span>syn::Token; |
| |
| <span class="attribute">#[derive(Copy, Clone)] |
| </span><span class="kw">pub struct </span>Args { |
| <span class="kw">pub </span>local: bool, |
| } |
| |
| <span class="kw">mod </span>kw { |
| <span class="macro">syn::custom_keyword!</span>(Send); |
| } |
| |
| <span class="kw">impl </span>Parse <span class="kw">for </span>Args { |
| <span class="kw">fn </span>parse(input: ParseStream) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">match </span>try_parse(input) { |
| <span class="prelude-val">Ok</span>(args) <span class="kw">if </span>input.is_empty() => <span class="prelude-val">Ok</span>(args), |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(error()), |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>try_parse(input: ParseStream) -> <span class="prelude-ty">Result</span><Args> { |
| <span class="kw">if </span>input.peek(<span class="macro">Token!</span>[<span class="question-mark">?</span>]) { |
| input.parse::<<span class="macro">Token!</span>[<span class="question-mark">?</span>]>()<span class="question-mark">?</span>; |
| input.parse::<kw::Send>()<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(Args { local: <span class="bool-val">true </span>}) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(Args { local: <span class="bool-val">false </span>}) |
| } |
| } |
| |
| <span class="kw">fn </span>error() -> Error { |
| <span class="kw">let </span>msg = <span class="string">"expected #[async_trait] or #[async_trait(?Send)]"</span>; |
| Error::new(Span::call_site(), msg) |
| } |
| </code></pre></div> |
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