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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="Formatting macro for constructing `Ident`s."><meta name="keywords" content="rust, rustlang, rust-lang, format_ident"><title>quote::format_ident - Rust</title><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="../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../ayu.css" disabled ><script id="default-settings"></script><script src="../storage.js"></script><script src="../crates.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../favicon.svg">
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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="Formatting macro for constructing `Ident`s."><meta name="keywords" content="rust, rustlang, rust-lang, format_ident"><title>format_ident in quote - Rust</title><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="../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../ayu.css" disabled ><script id="default-settings"></script><script src="../storage.js"></script><script src="../crates.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc macro"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../quote/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class="location"><a href="index.html">quote</a></p><div id="sidebar-vars" data-name="format_ident" data-ty="macro" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../theme.js"></script><nav class="sub"><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" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Macro <a href="index.html">quote</a>::<wbr><a class="macro" href="">format_ident</a></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/quote/format.rs.html#110-124" title="goto source code">[src]</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><div class="example-wrap"><pre class="rust macro">
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<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">format_ident</span> {
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<link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc macro"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../quote/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class="location"><a href="index.html">quote</a></p><div id="sidebar-vars" data-name="format_ident" data-ty="macro" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><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" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Macro <a href="index.html">quote</a>::<wbr><a class="macro" href="">format_ident</a><button id="copy-path" onclick="copy_path(this)">⎘</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/quote/format.rs.html#110-124" title="goto source code">[src]</a></span></h1><div class="docblock type-decl"><div class="example-wrap"><pre class="rust macro">
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<span class="macro">macro_rules!</span> <span class="ident">format_ident</span> {
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>:<span class="ident">expr</span>) <span class="op">=</span><span class="op">></span> { ... };
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">rest</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=</span><span class="op">></span> { ... };
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}</pre></div>
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@@ -38,14 +38,14 @@ provided.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="comment">// If `ident` is an Ident, the span of `my_ident` will be inherited from it.</span>
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<span class="kw">let</span> <span class="ident">my_ident</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"My{}{}"</span>, <span class="ident">ident</span>, <span class="string">"IsCool"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">my_ident</span>, <span class="string">"MyIdentIsCool"</span>);</pre></div>
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<span class="kw">let</span> <span class="ident">my_ident</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"My{}{}"</span>, <span class="ident">ident</span>, <span class="string">"IsCool"</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">my_ident</span>, <span class="string">"MyIdentIsCool"</span>);</pre></div>
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<p>Alternatively, the span can be overridden by passing the <code>span</code> named
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argument.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">my_span</span> <span class="op">=</span> <span class="comment">/* ... */</span>;
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<span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"MyIdent"</span>, <span class="ident">span</span> <span class="op">=</span> <span class="ident">my_span</span>);</pre></div>
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<span class="macro">format_ident!</span>(<span class="string">"MyIdent"</span>, <span class="ident">span</span> <span class="op">=</span> <span class="ident">my_span</span>);</pre></div>
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<p><br></p>
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<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
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<p>This method will panic if the resulting formatted string is not a valid
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@@ -55,32 +55,32 @@ identifier.</p>
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<p>Composing raw and non-raw identifiers:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">my_ident</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"My{}"</span>, <span class="string">"Ident"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">my_ident</span>, <span class="string">"MyIdent"</span>);
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<span class="kw">let</span> <span class="ident">my_ident</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"My{}"</span>, <span class="string">"Ident"</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">my_ident</span>, <span class="string">"MyIdent"</span>);
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<span class="kw">let</span> <span class="ident">raw</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"r#Raw"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">raw</span>, <span class="string">"r#Raw"</span>);
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<span class="kw">let</span> <span class="ident">raw</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"r#Raw"</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">raw</span>, <span class="string">"r#Raw"</span>);
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<span class="kw">let</span> <span class="ident">my_ident_raw</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"{}Is{}"</span>, <span class="ident">my_ident</span>, <span class="ident">raw</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">my_ident_raw</span>, <span class="string">"MyIdentIsRaw"</span>);</pre></div>
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<span class="kw">let</span> <span class="ident">my_ident_raw</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"{}Is{}"</span>, <span class="ident">my_ident</span>, <span class="ident">raw</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">my_ident_raw</span>, <span class="string">"MyIdentIsRaw"</span>);</pre></div>
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<p>Integer formatting options:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">num</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">10</span>;
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<span class="kw">let</span> <span class="ident">decimal</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"Id_{}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">decimal</span>, <span class="string">"Id_10"</span>);
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<span class="kw">let</span> <span class="ident">decimal</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"Id_{}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">decimal</span>, <span class="string">"Id_10"</span>);
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<span class="kw">let</span> <span class="ident">octal</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"Id_{:o}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">octal</span>, <span class="string">"Id_12"</span>);
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<span class="kw">let</span> <span class="ident">octal</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"Id_{:o}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">octal</span>, <span class="string">"Id_12"</span>);
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<span class="kw">let</span> <span class="ident">binary</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"Id_{:b}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">binary</span>, <span class="string">"Id_1010"</span>);
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<span class="kw">let</span> <span class="ident">binary</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"Id_{:b}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">binary</span>, <span class="string">"Id_1010"</span>);
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<span class="kw">let</span> <span class="ident">lower_hex</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"Id_{:x}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lower_hex</span>, <span class="string">"Id_a"</span>);
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<span class="kw">let</span> <span class="ident">lower_hex</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"Id_{:x}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">lower_hex</span>, <span class="string">"Id_a"</span>);
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<span class="kw">let</span> <span class="ident">upper_hex</span> <span class="op">=</span> <span class="macro">format_ident</span><span class="macro">!</span>(<span class="string">"Id_{:X}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">upper_hex</span>, <span class="string">"Id_A"</span>);</pre></div>
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</div></section><section id="search" class="content hidden"></section><section class="footer"></section><div id="rustdoc-vars" data-root-path="../" data-current-crate="quote" data-search-js="../search-index.js"></div>
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<span class="kw">let</span> <span class="ident">upper_hex</span> <span class="op">=</span> <span class="macro">format_ident!</span>(<span class="string">"Id_{:X}"</span>, <span class="ident">num</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">upper_hex</span>, <span class="string">"Id_A"</span>);</pre></div>
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</div></section><section id="search" class="content hidden"></section><div id="rustdoc-vars" data-root-path="../" data-current-crate="quote" data-search-index-js="../search-index.js" data-search-js="../search.js"></div>
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