| <!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/bound.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>bound.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> |
| <span id="3">3</span> |
| <span id="4">4</span> |
| <span id="5">5</span> |
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| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
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| <span id="48">48</span> |
| </pre><pre class="rust"><code><span class="kw">use </span>proc_macro2::{Ident, Span, TokenStream}; |
| <span class="kw">use </span>quote::quote_spanned; |
| <span class="kw">use </span>syn::punctuated::Punctuated; |
| <span class="kw">use </span>syn::{Token, TypeParamBound}; |
| |
| <span class="kw">pub type </span>Supertraits = Punctuated<TypeParamBound, <span class="macro">Token!</span>[+]>; |
| |
| <span class="kw">pub enum </span>InferredBound { |
| Send, |
| Sync, |
| } |
| |
| <span class="kw">pub fn </span>has_bound(supertraits: <span class="kw-2">&</span>Supertraits, bound: <span class="kw-2">&</span>InferredBound) -> bool { |
| <span class="kw">for </span>supertrait <span class="kw">in </span>supertraits { |
| <span class="kw">if let </span>TypeParamBound::Trait(supertrait) = supertrait { |
| <span class="kw">if </span>supertrait.path.is_ident(bound) |
| || supertrait.path.segments.len() == <span class="number">3 |
| </span>&& (supertrait.path.segments[<span class="number">0</span>].ident == <span class="string">"std" |
| </span>|| supertrait.path.segments[<span class="number">0</span>].ident == <span class="string">"core"</span>) |
| && supertrait.path.segments[<span class="number">1</span>].ident == <span class="string">"marker" |
| </span>&& supertrait.path.segments[<span class="number">2</span>].ident == <span class="kw-2">*</span>bound |
| { |
| <span class="kw">return </span><span class="bool-val">true</span>; |
| } |
| } |
| } |
| <span class="bool-val">false |
| </span>} |
| |
| <span class="kw">impl </span>InferredBound { |
| <span class="kw">fn </span>as_str(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>str { |
| <span class="kw">match </span><span class="self">self </span>{ |
| InferredBound::Send => <span class="string">"Send"</span>, |
| InferredBound::Sync => <span class="string">"Sync"</span>, |
| } |
| } |
| |
| <span class="kw">pub fn </span>spanned_path(<span class="kw-2">&</span><span class="self">self</span>, span: Span) -> TokenStream { |
| <span class="kw">let </span>ident = Ident::new(<span class="self">self</span>.as_str(), span); |
| <span class="macro">quote_spanned!</span>(span=> ::core::marker::#ident) |
| } |
| } |
| |
| <span class="kw">impl </span>PartialEq<InferredBound> <span class="kw">for </span>Ident { |
| <span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, bound: <span class="kw-2">&</span>InferredBound) -> bool { |
| <span class="self">self </span>== bound.as_str() |
| } |
| } |
| </code></pre></div> |
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