| <!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/syn-2.0.18/src/whitespace.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>whitespace.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="../../syn/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="../../syn/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">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>skip(<span class="kw-2">mut </span>s: <span class="kw-2">&</span>str) -> <span class="kw-2">&</span>str { |
| <span class="lifetime">'skip</span>: <span class="kw">while </span>!s.is_empty() { |
| <span class="kw">let </span>byte = s.as_bytes()[<span class="number">0</span>]; |
| <span class="kw">if </span>byte == <span class="string">b'/' </span>{ |
| <span class="kw">if </span>s.starts_with(<span class="string">"//"</span>) |
| && (!s.starts_with(<span class="string">"///"</span>) || s.starts_with(<span class="string">"////"</span>)) |
| && !s.starts_with(<span class="string">"//!"</span>) |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(i) = s.find(<span class="string">'\n'</span>) { |
| s = <span class="kw-2">&</span>s[i + <span class="number">1</span>..]; |
| <span class="kw">continue</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="string">""</span>; |
| } |
| } <span class="kw">else if </span>s.starts_with(<span class="string">"/**/"</span>) { |
| s = <span class="kw-2">&</span>s[<span class="number">4</span>..]; |
| <span class="kw">continue</span>; |
| } <span class="kw">else if </span>s.starts_with(<span class="string">"/*"</span>) |
| && (!s.starts_with(<span class="string">"/**"</span>) || s.starts_with(<span class="string">"/***"</span>)) |
| && !s.starts_with(<span class="string">"/*!"</span>) |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>depth = <span class="number">0</span>; |
| <span class="kw">let </span>bytes = s.as_bytes(); |
| <span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>; |
| <span class="kw">let </span>upper = bytes.len() - <span class="number">1</span>; |
| <span class="kw">while </span>i < upper { |
| <span class="kw">if </span>bytes[i] == <span class="string">b'/' </span>&& bytes[i + <span class="number">1</span>] == <span class="string">b'*' </span>{ |
| depth += <span class="number">1</span>; |
| i += <span class="number">1</span>; <span class="comment">// eat '*' |
| </span>} <span class="kw">else if </span>bytes[i] == <span class="string">b'*' </span>&& bytes[i + <span class="number">1</span>] == <span class="string">b'/' </span>{ |
| depth -= <span class="number">1</span>; |
| <span class="kw">if </span>depth == <span class="number">0 </span>{ |
| s = <span class="kw-2">&</span>s[i + <span class="number">2</span>..]; |
| <span class="kw">continue </span><span class="lifetime">'skip</span>; |
| } |
| i += <span class="number">1</span>; <span class="comment">// eat '/' |
| </span>} |
| i += <span class="number">1</span>; |
| } |
| <span class="kw">return </span>s; |
| } |
| } |
| <span class="kw">match </span>byte { |
| <span class="string">b' ' </span>| <span class="number">0x09</span>..=<span class="number">0x0d </span>=> { |
| s = <span class="kw-2">&</span>s[<span class="number">1</span>..]; |
| <span class="kw">continue</span>; |
| } |
| b <span class="kw">if </span>b <= <span class="number">0x7f </span>=> {} |
| <span class="kw">_ </span>=> { |
| <span class="kw">let </span>ch = s.chars().next().unwrap(); |
| <span class="kw">if </span>is_whitespace(ch) { |
| s = <span class="kw-2">&</span>s[ch.len_utf8()..]; |
| <span class="kw">continue</span>; |
| } |
| } |
| } |
| <span class="kw">return </span>s; |
| } |
| s |
| } |
| |
| <span class="kw">fn </span>is_whitespace(ch: char) -> bool { |
| <span class="comment">// Rust treats left-to-right mark and right-to-left mark as whitespace |
| </span>ch.is_whitespace() || ch == <span class="string">'\u{200e}' </span>|| ch == <span class="string">'\u{200f}' |
| </span>} |
| </code></pre></div> |
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