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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="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.59/src/extra.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>extra.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_macro2/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_macro2/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">//! Items which do not have a correspondence to any API in the proc_macro crate,
//! but are necessary to include in proc-macro2.
</span><span class="kw">use </span><span class="kw">crate</span>::fallback;
<span class="kw">use </span><span class="kw">crate</span>::imp;
<span class="kw">use </span><span class="kw">crate</span>::marker::Marker;
<span class="kw">use </span><span class="kw">crate</span>::Span;
<span class="kw">use </span>core::fmt::{<span class="self">self</span>, Debug};
<span class="doccomment">/// An object that holds a [`Group`]&#39;s `span_open()` and `span_close()` together
/// (in a more compact representation than holding those 2 spans individually.
///
/// [`Group`]: crate::Group
</span><span class="attribute">#[derive(Copy, Clone)]
</span><span class="kw">pub struct </span>DelimSpan {
inner: DelimSpanEnum,
_marker: Marker,
}
<span class="attribute">#[derive(Copy, Clone)]
</span><span class="kw">enum </span>DelimSpanEnum {
<span class="attribute">#[cfg(wrap_proc_macro)]
</span>Compiler {
join: proc_macro::Span,
<span class="attribute">#[cfg(not(no_group_open_close))]
</span>open: proc_macro::Span,
<span class="attribute">#[cfg(not(no_group_open_close))]
</span>close: proc_macro::Span,
},
Fallback(fallback::Span),
}
<span class="kw">impl </span>DelimSpan {
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(group: <span class="kw-2">&amp;</span>imp::Group) -&gt; <span class="self">Self </span>{
<span class="attribute">#[cfg(wrap_proc_macro)]
</span><span class="kw">let </span>inner = <span class="kw">match </span>group {
imp::Group::Compiler(group) =&gt; DelimSpanEnum::Compiler {
join: group.span(),
<span class="attribute">#[cfg(not(no_group_open_close))]
</span>open: group.span_open(),
<span class="attribute">#[cfg(not(no_group_open_close))]
</span>close: group.span_close(),
},
imp::Group::Fallback(group) =&gt; DelimSpanEnum::Fallback(group.span()),
};
<span class="attribute">#[cfg(not(wrap_proc_macro))]
</span><span class="kw">let </span>inner = DelimSpanEnum::Fallback(group.span());
DelimSpan {
inner,
_marker: Marker,
}
}
<span class="doccomment">/// Returns a span covering the entire delimited group.
</span><span class="kw">pub fn </span>join(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Span {
<span class="kw">match </span><span class="kw-2">&amp;</span><span class="self">self</span>.inner {
<span class="attribute">#[cfg(wrap_proc_macro)]
</span>DelimSpanEnum::Compiler { join, .. } =&gt; Span::_new(imp::Span::Compiler(<span class="kw-2">*</span>join)),
DelimSpanEnum::Fallback(span) =&gt; Span::_new_fallback(<span class="kw-2">*</span>span),
}
}
<span class="doccomment">/// Returns a span for the opening punctuation of the group only.
</span><span class="kw">pub fn </span>open(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Span {
<span class="kw">match </span><span class="kw-2">&amp;</span><span class="self">self</span>.inner {
<span class="attribute">#[cfg(wrap_proc_macro)]
</span>DelimSpanEnum::Compiler {
<span class="attribute">#[cfg(not(no_group_open_close))]
</span>open,
<span class="attribute">#[cfg(no_group_open_close)]
</span>join: open,
..
} =&gt; Span::_new(imp::Span::Compiler(<span class="kw-2">*</span>open)),
DelimSpanEnum::Fallback(span) =&gt; Span::_new_fallback(span.first_byte()),
}
}
<span class="doccomment">/// Returns a span for the closing punctuation of the group only.
</span><span class="kw">pub fn </span>close(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Span {
<span class="kw">match </span><span class="kw-2">&amp;</span><span class="self">self</span>.inner {
<span class="attribute">#[cfg(wrap_proc_macro)]
</span>DelimSpanEnum::Compiler {
<span class="attribute">#[cfg(not(no_group_open_close))]
</span>close,
<span class="attribute">#[cfg(no_group_open_close)]
</span>join: close,
..
} =&gt; Span::_new(imp::Span::Compiler(<span class="kw-2">*</span>close)),
DelimSpanEnum::Fallback(span) =&gt; Span::_new_fallback(span.last_byte()),
}
}
}
<span class="kw">impl </span>Debug <span class="kw">for </span>DelimSpan {
<span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
Debug::fmt(<span class="kw-2">&amp;</span><span class="self">self</span>.join(), f)
}
}
</code></pre></div>
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