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29 lines
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<!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="A collection of methods that do not exist in `proc_macro::Diagnostic` but still useful to have around."><meta name="keywords" content="rust, rustlang, rust-lang, DiagnosticExt"><title>DiagnosticExt in proc_macro_error - Rust</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" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../dark.css" disabled><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../storage.js"></script><script src="../crates.js"></script><script defer src="../main.js"></script>
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</a><h2 class="location">Trait DiagnosticExt</h2><div class="sidebar-elems"><div class="block items"><h3 class="sidebar-title"><a href="#required-methods">Required Methods</a></h3><div class="sidebar-links"><a href="#tymethod.span_range_error">span_range_error</a><a href="#tymethod.span_range_help">span_range_help</a><a href="#tymethod.span_range_note">span_range_note</a><a href="#tymethod.spanned_range">spanned_range</a></div><h3 class="sidebar-title"><a href="#implementors">Implementors</a></h3></div><h2 class="location">Other items in<br><a href="index.html">proc_macro_error</a></h2><div id="sidebar-vars" data-name="DiagnosticExt" data-ty="trait" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../proc_macro_error/index.html"><img class="rust-logo" src="../rust-logo.png" alt="logo"></a><nav class="sub"><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><h1 class="fqn"><span class="in-band">Trait <a href="index.html">proc_macro_error</a>::<wbr><a class="trait" href="#">DiagnosticExt</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../src/proc_macro_error/diagnostic.rs.html#34-67" title="goto source code">[src]</a></span></h1><div class="docblock item-decl"><pre class="rust trait"><code>pub trait DiagnosticExt: Sealed {
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fn <a href="#tymethod.spanned_range" class="fnname">spanned_range</a>(<br> span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, <br> level: <a class="enum" href="enum.Level.html" title="enum proc_macro_error::Level">Level</a>, <br> message: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a><br> ) -> Self;
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<div class="item-spacer"></div> fn <a href="#tymethod.span_range_error" class="fnname">span_range_error</a>(self, span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, msg: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> Self;
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<div class="item-spacer"></div> fn <a href="#tymethod.span_range_help" class="fnname">span_range_help</a>(self, span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, msg: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> Self;
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<div class="item-spacer"></div> fn <a href="#tymethod.span_range_note" class="fnname">span_range_note</a>(self, span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, msg: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> Self;
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}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A collection of methods that do not exist in <code>proc_macro::Diagnostic</code>
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but still useful to have around.</p>
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<p>This trait is sealed and cannot be implemented outside of <code>proc_macro_error</code>.</p>
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</div></details><h2 id="required-methods" class="small-section-header">Required methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="tymethod.spanned_range" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/proc_macro_error/diagnostic.rs.html#39" title="goto source code">[src]</a></div><h4 class="code-header">fn <a href="#tymethod.spanned_range" class="fnname">spanned_range</a>(span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, level: <a class="enum" href="enum.Level.html" title="enum proc_macro_error::Level">Level</a>, message: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> Self</h4></div></summary><div class="docblock"><p>Create a new diagnostic message that points to the <code>span_range</code>.</p>
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<p>This function is the same as <code>Diagnostic::spanned</code> but produces considerably
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better error messages for multi-token spans on stable.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="tymethod.span_range_error" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/proc_macro_error/diagnostic.rs.html#46" title="goto source code">[src]</a></div><h4 class="code-header">fn <a href="#tymethod.span_range_error" class="fnname">span_range_error</a>(self, span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, msg: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> Self</h4></div></summary><div class="docblock"><p>Add another error message to self such that it will be emitted right after
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the main message.</p>
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<p>This function is the same as <code>Diagnostic::span_error</code> but produces considerably
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better error messages for multi-token spans on stable.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="tymethod.span_range_help" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/proc_macro_error/diagnostic.rs.html#56" title="goto source code">[src]</a></div><h4 class="code-header">fn <a href="#tymethod.span_range_help" class="fnname">span_range_help</a>(self, span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, msg: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> Self</h4></div></summary><div class="docblock"><p>Attach a “help” note to your main message, the note will have it’s own span on nightly.</p>
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<p>This function is the same as <code>Diagnostic::span_help</code> but produces considerably
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better error messages for multi-token spans on stable.</p>
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<h5 id="span" class="section-header"><a href="#span">Span</a></h5>
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<p>The span is ignored on stable, the note effectively inherits its parent’s (main message) span</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="tymethod.span_range_note" class="method has-srclink"><div class="rightside"><a class="srclink" href="../src/proc_macro_error/diagnostic.rs.html#66" title="goto source code">[src]</a></div><h4 class="code-header">fn <a href="#tymethod.span_range_note" class="fnname">span_range_note</a>(self, span_range: <a class="struct" href="struct.SpanRange.html" title="struct proc_macro_error::SpanRange">SpanRange</a>, msg: <a class="struct" href="https://doc.rust-lang.org/1.59.0/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -> Self</h4></div></summary><div class="docblock"><p>Attach a note to your main message, the note will have it’s own span on nightly.</p>
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<p>This function is the same as <code>Diagnostic::span_note</code> but produces considerably
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better error messages for multi-token spans on stable.</p>
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<h5 id="span-1" class="section-header"><a href="#span-1">Span</a></h5>
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<p>The span is ignored on stable, the note effectively inherits its parent’s (main message) span</p>
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</div></details></div><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"><div id="impl-DiagnosticExt" class="impl has-srclink"><div class="rightside"><a class="srclink" href="../src/proc_macro_error/diagnostic.rs.html#69-96" title="goto source code">[src]</a></div><a href="#impl-DiagnosticExt" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="trait.DiagnosticExt.html" title="trait proc_macro_error::DiagnosticExt">DiagnosticExt</a> for <a class="struct" href="struct.Diagnostic.html" title="struct proc_macro_error::Diagnostic">Diagnostic</a></h3></div></div><script type="text/javascript" src="../implementors/proc_macro_error/trait.DiagnosticExt.js" async></script></section><section id="search" class="content hidden"></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="1.59.0 (9d1b2106e 2022-02-23)" ></div>
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