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17 lines
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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="automatically converts the child parser’s result to another type"><meta name="keywords" content="rust, rustlang, rust-lang, into"><title>into in nom::combinator - Rust</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 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class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../nom/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../nom/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><div class="sidebar-elems"><h2 class="location"><a href="index.html">In nom::combinator</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../nom/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Function <a href="../index.html">nom</a>::<wbr><a href="index.html">combinator</a>::<wbr><a class="fn" href="#">into</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../src/nom/combinator/mod.rs.html#663-678">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust fn"><code>pub fn into<I, O1, O2, E1, E2, F>(<br> parser: F<br>) -> impl <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(I) -> <a class="type" href="../type.IResult.html" title="type nom::IResult">IResult</a><I, O2, E2> <span class="where fmt-newline">where<br> O1: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><O2>,<br> E1: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><E2>,<br> E1: <a class="trait" href="../error/trait.ParseError.html" title="trait nom::error::ParseError">ParseError</a><I>,<br> E2: <a class="trait" href="../error/trait.ParseError.html" title="trait nom::error::ParseError">ParseError</a><I>,<br> F: <a class="trait" href="../trait.Parser.html" title="trait nom::Parser">Parser</a><I, O1, E1>, </span></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>automatically converts the child parser’s result to another type</p>
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<p>it will be able to convert the output value and the error value
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as long as the <code>Into</code> implementations are available</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">nom::combinator::into</span>;
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<span class="kw">use</span> <span class="ident">nom::character::complete::alpha1</span>;
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<span class="kw">fn</span> <span class="ident">parser1</span>(<span class="ident">i</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">IResult</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> {
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<span class="ident">alpha1</span>(<span class="ident">i</span>)
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}
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">parser2</span> <span class="op">=</span> <span class="ident">into</span>(<span class="ident">parser1</span>);
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<span class="comment">// the parser converts the &str output of the child parser into a Vec<u8></span>
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<span class="kw">let</span> <span class="ident">bytes</span>: <span class="ident">IResult</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span><span class="op">></span> <span class="op">=</span> <span class="ident">parser2</span>(<span class="string">"abcd"</span>);
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<span class="macro">assert_eq!</span>(<span class="ident">bytes</span>, <span class="prelude-val">Ok</span>((<span class="string">""</span>, <span class="macro">vec!</span>[<span class="number">97</span>, <span class="number">98</span>, <span class="number">99</span>, <span class="number">100</span>])));</code></pre></div>
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