| <!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/ident_fragment.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ident_fragment.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>core::fmt; |
| <span class="kw">use </span>proc_macro2::{Ident, Span}; |
| <span class="kw">use </span>std::borrow::Cow; |
| |
| <span class="doccomment">/// Specialized formatting trait used by `format_ident!`. |
| /// |
| /// [`Ident`] arguments formatted using this trait will have their `r#` prefix |
| /// stripped, if present. |
| /// |
| /// See [`format_ident!`] for more information. |
| /// |
| /// [`format_ident!`]: crate::format_ident |
| </span><span class="kw">pub trait </span>IdentFragment { |
| <span class="doccomment">/// Format this value as an identifier fragment. |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result; |
| |
| <span class="doccomment">/// Span associated with this `IdentFragment`. |
| /// |
| /// If non-`None`, may be inherited by formatted identifiers. |
| </span><span class="kw">fn </span>span(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Span> { |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">impl</span><T: IdentFragment + <span class="question-mark">?</span>Sized> IdentFragment <span class="kw">for </span><span class="kw-2">&</span>T { |
| <span class="kw">fn </span>span(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Span> { |
| <T <span class="kw">as </span>IdentFragment>::span(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| IdentFragment::fmt(<span class="kw-2">*</span><span class="self">self</span>, f) |
| } |
| } |
| |
| <span class="kw">impl</span><T: IdentFragment + <span class="question-mark">?</span>Sized> IdentFragment <span class="kw">for </span><span class="kw-2">&mut </span>T { |
| <span class="kw">fn </span>span(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Span> { |
| <T <span class="kw">as </span>IdentFragment>::span(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| IdentFragment::fmt(<span class="kw-2">*</span><span class="self">self</span>, f) |
| } |
| } |
| |
| <span class="kw">impl </span>IdentFragment <span class="kw">for </span>Ident { |
| <span class="kw">fn </span>span(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Span> { |
| <span class="prelude-val">Some</span>(<span class="self">self</span>.span()) |
| } |
| |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="kw">let </span>id = <span class="self">self</span>.to_string(); |
| <span class="kw">if </span>id.starts_with(<span class="string">"r#"</span>) { |
| fmt::Display::fmt(<span class="kw-2">&</span>id[<span class="number">2</span>..], f) |
| } <span class="kw">else </span>{ |
| fmt::Display::fmt(<span class="kw-2">&</span>id[..], f) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T> IdentFragment <span class="kw">for </span>Cow<<span class="lifetime">'_</span>, T> |
| <span class="kw">where |
| </span>T: IdentFragment + ToOwned + <span class="question-mark">?</span>Sized, |
| { |
| <span class="kw">fn </span>span(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Span> { |
| T::span(<span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| T::fmt(<span class="self">self</span>, f) |
| } |
| } |
| |
| <span class="comment">// Limited set of types which this is implemented for, as we want to avoid types |
| // which will often include non-identifier characters in their `Display` impl. |
| </span><span class="macro">macro_rules! </span>ident_fragment_display { |
| ($(<span class="macro-nonterminal">$T</span>:ty),<span class="kw-2">*</span>) => { |
| $( |
| <span class="kw">impl </span>IdentFragment <span class="kw">for </span><span class="macro-nonterminal">$T </span>{ |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| fmt::Display::fmt(<span class="self">self</span>, f) |
| } |
| } |
| )* |
| }; |
| } |
| |
| <span class="macro">ident_fragment_display!</span>(bool, str, String, char); |
| <span class="macro">ident_fragment_display!</span>(u8, u16, u32, u64, u128, usize); |
| </code></pre></div> |
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