<!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="API documentation for the Rust `delimited` macro in crate `synom`."> <meta name="keywords" content="rust, rustlang, rust-lang, delimited"> <title>synom::delimited - Rust</title> <link rel="stylesheet" type="text/css" href="../normalize.css"> <link rel="stylesheet" type="text/css" href="../rustdoc.css"> <link rel="stylesheet" type="text/css" href="../main.css"> </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"> <p class='location'><a href='index.html'>synom</a></p><script>window.sidebarCurrent = {name: 'delimited', ty: 'macro', relpath: ''};</script><script defer src="sidebar-items.js"></script> </nav> <nav class="sub"> <form class="search-form js-only"> <div class="search-container"> <input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"> </div> </form> </nav> <section id='main' class="content"> <h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>synom</a>::<wbr><a class="macro" href=''>delimited</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/synom/lib.rs.html#903-914' title='goto source code'>[src]</a></span></h1> <pre class="rust macro"> <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">delimited</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">submac</span>:<span class="macro">ident</span><span class="macro">!</span>( $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">args</span>:<span class="ident">tt</span>)<span class="op">*</span> ), $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">rest</span>:<span class="ident">tt</span>)<span class="op">+</span>) <span class="op">=></span> { ... }; (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">f</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">rest</span>:<span class="ident">tt</span>)<span class="op">+</span>) <span class="op">=></span> { ... }; }</pre> <div class='docblock'><p>Value surrounded by a pair of delimiters.</p> <ul> <li><strong>Syntax:</strong> <code>delimited!(OPEN, THING, CLOSE)</code></li> <li><strong>Output:</strong> <code>THING</code></li> </ul> <pre class="rust rust-example-rendered"> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">syn</span>; <span class="attribute">#[<span class="ident">macro_use</span>]</span> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">synom</span>; <span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">Expr</span>; <span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">parse</span>::<span class="ident">expr</span>; <span class="comment">// An expression surrounded by [[ ... ]].</span> <span class="macro">named</span><span class="macro">!</span>(<span class="ident">double_bracket_expr</span> <span class="op">-></span> <span class="ident">Expr</span>, <span class="macro">delimited</span><span class="macro">!</span>(<span class="macro">punct</span><span class="macro">!</span>(<span class="string">"[["</span>), <span class="ident">expr</span>, <span class="macro">punct</span><span class="macro">!</span>(<span class="string">"]]"</span>)) ); <span class="kw">fn</span> <span class="ident">main</span>() { <span class="kw">let</span> <span class="ident">input</span> <span class="op">=</span> <span class="string">"[[ 1 + 1 ]]"</span>; <span class="kw">let</span> <span class="ident">parsed</span> <span class="op">=</span> <span class="ident">double_bracket_expr</span>(<span class="ident">input</span>).<span class="ident">expect</span>(<span class="string">"double bracket expr"</span>); <span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">parsed</span>); }</pre> </div></section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt>?</dt> <dd>Show this help dialog</dd> <dt>S</dt> <dd>Focus the search field</dd> <dt>⇤</dt> <dd>Move up in search results</dd> <dt>⇥</dt> <dd>Move down in search results</dd> <dt>⏎</dt> <dd>Go to active search result</dd> <dt>+</dt> <dd>Collapse/expand all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../"; 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