28 lines
5.1 KiB
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28 lines
5.1 KiB
HTML
<!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 `tuple` macro in crate `nom`."><meta name="keywords" content="rust, rustlang, rust-lang, tuple"><title>nom::tuple - 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="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="shortcut icon" href="../favicon.ico"><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">☰</div><a href='../nom/index.html'><div class='logo-container'><img src='../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='index.html'>nom</a></p><script>window.sidebarCurrent = {name: 'tuple', ty: 'macro', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></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><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><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/nom/sequence.rs.html#33-39' title='goto source code'>[src]</a></span><span class='in-band'>Macro <a href='index.html'>nom</a>::<wbr><a class="macro" href=''>tuple</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">tuple</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">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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</div><div class='docblock'><p><code>tuple!(I->IResult<I,A>, I->IResult<I,B>, ... I->IResult<I,X>) => I -> IResult<I, (A, B, ..., X)></code>
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chains parsers and assemble the sub results in a tuple.</p>
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<p>The input type <code>I</code> must implement <code>nom::InputLength</code>.</p>
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<p>This combinator will count how much data is consumed by every child parser
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and take it into account if there is not enough data</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="comment">// the return type depends of the children parsers</span>
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<span class="macro">named</span><span class="macro">!</span>(<span class="ident">parser</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">u8</span>], (<span class="ident">u16</span>, <span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">></span>,
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<span class="macro">tuple</span><span class="macro">!</span>(
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<span class="ident">be_u16</span> ,
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<span class="macro">take</span><span class="macro">!</span>(<span class="number">3</span>),
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<span class="macro">tag</span><span class="macro">!</span>(<span class="string">"fg"</span>)
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)
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);
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<span class="macro">assert_eq</span><span class="macro">!</span>(
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<span class="ident">parser</span>(<span class="kw-2">&</span><span class="string">b"abcdefgh"</span>[..]),
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<span class="prelude-val">Ok</span>((
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<span class="kw-2">&</span><span class="string">b"h"</span>[..],
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(<span class="number">0x6162u16</span>, <span class="kw-2">&</span><span class="string">b"cde"</span>[..], <span class="kw-2">&</span><span class="string">b"fg"</span>[..])
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))
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);</pre></div>
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