143 lines
6.8 KiB
HTML
143 lines
6.8 KiB
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<meta name="description" content="API documentation for the Rust `delimited` macro in crate `synom`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, delimited">
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<title>synom::delimited - Rust</title>
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This old browser is unsupported and will most likely display funky
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things.
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<nav class="sidebar">
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<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>
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<section id='main' class="content">
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<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'>
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../src/synom/lib.rs.html#903-914' title='goto source code'>[src]</a></span></h1>
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<pre class="rust macro">
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<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">delimited</span> {
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(<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> { ... };
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(<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> { ... };
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}</pre>
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<div class='docblock'><p>Value surrounded by a pair of delimiters.</p>
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<ul>
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<li><strong>Syntax:</strong> <code>delimited!(OPEN, THING, CLOSE)</code></li>
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<li><strong>Output:</strong> <code>THING</code></li>
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</ul>
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<pre class="rust rust-example-rendered">
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">syn</span>;
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<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>;
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<span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">Expr</span>;
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<span class="kw">use</span> <span class="ident">syn</span>::<span class="ident">parse</span>::<span class="ident">expr</span>;
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<span class="comment">// An expression surrounded by [[ ... ]].</span>
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<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>,
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<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>))
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);
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">input</span> <span class="op">=</span> <span class="string">"[[ 1 + 1 ]]"</span>;
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<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>);
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<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">parsed</span>);
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}</pre>
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</div></section>
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<div class="infos">
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<h2>Search Tricks</h2>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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and <code>const</code>.
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Search functions by type signature (e.g.
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<script>
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window.rootPath = "../";
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window.currentCrate = "synom";
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