| <!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/proc-macro-error-1.0.4/src/imp/delegate.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>delegate.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="../../../proc_macro_error/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="../../../proc_macro_error/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="doccomment">//! This implementation uses [`proc_macro::Diagnostic`], nightly only. |
| |
| </span><span class="kw">use </span>std::cell::Cell; |
| |
| <span class="kw">use </span>proc_macro::{Diagnostic <span class="kw">as </span>PDiag, Level <span class="kw">as </span>PLevel}; |
| |
| <span class="kw">use crate</span>::{ |
| abort_now, check_correctness, |
| diagnostic::{Diagnostic, Level, SuggestionKind}, |
| }; |
| |
| <span class="kw">pub fn </span>abort_if_dirty() { |
| check_correctness(); |
| <span class="kw">if </span>IS_DIRTY.with(|c| c.get()) { |
| abort_now() |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>cleanup() -> Vec<Diagnostic> { |
| IS_DIRTY.with(|c| c.set(<span class="bool-val">false</span>)); |
| <span class="macro">vec!</span>[] |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>emit_diagnostic(diag: Diagnostic) { |
| <span class="kw">let </span>Diagnostic { |
| level, |
| span_range, |
| msg, |
| suggestions, |
| children, |
| } = diag; |
| |
| <span class="kw">let </span>span = span_range.collapse().unwrap(); |
| |
| <span class="kw">let </span>level = <span class="kw">match </span>level { |
| Level::Warning => PLevel::Warning, |
| Level::Error => { |
| IS_DIRTY.with(|c| c.set(<span class="bool-val">true</span>)); |
| PLevel::Error |
| } |
| <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(), |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>res = PDiag::spanned(span, level, msg); |
| |
| <span class="kw">for </span>(kind, msg, span) <span class="kw">in </span>suggestions { |
| res = <span class="kw">match </span>(kind, span) { |
| (SuggestionKind::Note, <span class="prelude-val">Some</span>(span_range)) => { |
| res.span_note(span_range.collapse().unwrap(), msg) |
| } |
| (SuggestionKind::Help, <span class="prelude-val">Some</span>(span_range)) => { |
| res.span_help(span_range.collapse().unwrap(), msg) |
| } |
| (SuggestionKind::Note, <span class="prelude-val">None</span>) => res.note(msg), |
| (SuggestionKind::Help, <span class="prelude-val">None</span>) => res.help(msg), |
| } |
| } |
| |
| <span class="kw">for </span>(span_range, msg) <span class="kw">in </span>children { |
| <span class="kw">let </span>span = span_range.collapse().unwrap(); |
| res = res.span_error(span, msg); |
| } |
| |
| res.emit() |
| } |
| |
| <span class="macro">thread_local! </span>{ |
| <span class="kw">static </span>IS_DIRTY: Cell<bool> = Cell::new(<span class="bool-val">false</span>); |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="proc_macro_error" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |