| <!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/quote-1.0.28/src/spanned.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>spanned.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="../../quote/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="../../quote/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="kw">use </span><span class="kw">crate</span>::ToTokens; |
| <span class="kw">use </span>proc_macro2::extra::DelimSpan; |
| <span class="kw">use </span>proc_macro2::{Span, TokenStream}; |
| |
| <span class="comment">// Not public API other than via the syn crate. Use syn::spanned::Spanned. |
| </span><span class="kw">pub trait </span>Spanned: private::Sealed { |
| <span class="kw">fn </span>__span(<span class="kw-2">&</span><span class="self">self</span>) -> Span; |
| } |
| |
| <span class="kw">impl </span>Spanned <span class="kw">for </span>Span { |
| <span class="kw">fn </span>__span(<span class="kw-2">&</span><span class="self">self</span>) -> Span { |
| <span class="kw-2">*</span><span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl </span>Spanned <span class="kw">for </span>DelimSpan { |
| <span class="kw">fn </span>__span(<span class="kw-2">&</span><span class="self">self</span>) -> Span { |
| <span class="self">self</span>.join() |
| } |
| } |
| |
| <span class="kw">impl</span><T: <span class="question-mark">?</span>Sized + ToTokens> Spanned <span class="kw">for </span>T { |
| <span class="kw">fn </span>__span(<span class="kw-2">&</span><span class="self">self</span>) -> Span { |
| join_spans(<span class="self">self</span>.into_token_stream()) |
| } |
| } |
| |
| <span class="kw">fn </span>join_spans(tokens: TokenStream) -> Span { |
| <span class="attribute">#[cfg(not(needs_invalid_span_workaround))] |
| </span><span class="kw">let </span><span class="kw-2">mut </span>iter = tokens.into_iter().map(|tt| tt.span()); |
| |
| <span class="attribute">#[cfg(needs_invalid_span_workaround)] |
| </span><span class="kw">let </span><span class="kw-2">mut </span>iter = tokens.into_iter().filter_map(|tt| { |
| <span class="kw">let </span>span = tt.span(); |
| <span class="kw">let </span>debug = <span class="macro">format!</span>(<span class="string">"{:?}"</span>, span); |
| <span class="kw">if </span>debug.ends_with(<span class="string">"bytes(0..0)"</span>) { |
| <span class="prelude-val">None |
| </span>} <span class="kw">else </span>{ |
| <span class="prelude-val">Some</span>(span) |
| } |
| }); |
| |
| <span class="kw">let </span>first = <span class="kw">match </span>iter.next() { |
| <span class="prelude-val">Some</span>(span) => span, |
| <span class="prelude-val">None </span>=> <span class="kw">return </span>Span::call_site(), |
| }; |
| |
| iter.fold(<span class="prelude-val">None</span>, |_prev, next| <span class="prelude-val">Some</span>(next)) |
| .and_then(|last| first.join(last)) |
| .unwrap_or(first) |
| } |
| |
| <span class="kw">mod </span>private { |
| <span class="kw">use </span><span class="kw">crate</span>::ToTokens; |
| <span class="kw">use </span>proc_macro2::extra::DelimSpan; |
| <span class="kw">use </span>proc_macro2::Span; |
| |
| <span class="kw">pub trait </span>Sealed {} |
| <span class="kw">impl </span>Sealed <span class="kw">for </span>Span {} |
| <span class="kw">impl </span>Sealed <span class="kw">for </span>DelimSpan {} |
| <span class="kw">impl</span><T: <span class="question-mark">?</span>Sized + ToTokens> Sealed <span class="kw">for </span>T {} |
| } |
| </code></pre></div> |
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