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21 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="API documentation for the Rust `DoubleEndedSearcher` trait in crate `nom`."><meta name="keywords" content="rust, rustlang, rust-lang, DoubleEndedSearcher"><title>nom::lib::std::str::pattern::DoubleEndedSearcher - 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 trait"><!--[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><p class='location'>Trait DoubleEndedSearcher</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../../../../index.html'>nom</a>::<wbr><a href='../../../index.html'>lib</a>::<wbr><a href='../../index.html'>std</a>::<wbr><a href='../index.html'>str</a>::<wbr><a href='index.html'>pattern</a></p><script>window.sidebarCurrent = {name: 'DoubleEndedSearcher', ty: 'trait', 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 class='since' title='Stable since Rust version '></span><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='https://doc.rust-lang.org/nightly/src/core/str/pattern.rs.html#231' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='../../../../index.html'>nom</a>::<wbr><a href='../../../index.html'>lib</a>::<wbr><a href='../../index.html'>std</a>::<wbr><a href='../index.html'>str</a>::<wbr><a href='index.html'>pattern</a>::<wbr><a class="trait" href=''>DoubleEndedSearcher</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait DoubleEndedSearcher<'a>: <a class="trait" href="../../../../../nom/lib/std/str/pattern/trait.ReverseSearcher.html" title="trait nom::lib::std::str::pattern::ReverseSearcher">ReverseSearcher</a><'a> { }</pre></div><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>pattern</code>)</summary><p>API not fully fleshed out and ready to be stabilized</p>
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</details></div></div><div class='docblock'><p>A marker trait to express that a <code>ReverseSearcher</code>
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can be used for a <code>DoubleEndedIterator</code> implementation.</p>
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<p>For this, the impl of <code>Searcher</code> and <code>ReverseSearcher</code> need
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to follow these conditions:</p>
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<ul>
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<li>All results of <code>next()</code> need to be identical
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to the results of <code>next_back()</code> in reverse order.</li>
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<li><code>next()</code> and <code>next_back()</code> need to behave as
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the two ends of a range of values, that is they
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can not "walk past each other".</li>
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</ul>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<p><code>char::Searcher</code> is a <code>DoubleEndedSearcher</code> because searching for a
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<code>char</code> only requires looking at one at a time, which behaves the same
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from both ends.</p>
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<p><code>(&str)::Searcher</code> is not a <code>DoubleEndedSearcher</code> because
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the pattern <code>"aa"</code> in the haystack <code>"aaa"</code> matches as either
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<code>"[aa]a"</code> or <code>"a[aa]"</code>, depending from which side it is searched.</p>
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</div>
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<h2 id='implementors' class='small-section-header'>Implementors<a href='#implementors' class='anchor'></a></h2><div class='item-list' id='implementors-list'><h3 id='impl-DoubleEndedSearcher%3C%27a%3E' class='impl'><code class='in-band'>impl<'a> DoubleEndedSearcher<'a> for <a class="struct" href="../../../../../nom/lib/std/str/pattern/struct.CharSearcher.html" title="struct nom::lib::std::str::pattern::CharSearcher">CharSearcher</a><'a></code><a href='#impl-DoubleEndedSearcher%3C%27a%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/str/pattern.rs.html#420' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-DoubleEndedSearcher%3C%27a%3E-1' class='impl'><code class='in-band'>impl<'a, 'b> DoubleEndedSearcher<'a> for <a class="struct" href="../../../../../nom/lib/std/str/pattern/struct.CharSliceSearcher.html" title="struct nom::lib::std::str::pattern::CharSliceSearcher">CharSliceSearcher</a><'a, 'b></code><a href='#impl-DoubleEndedSearcher%3C%27a%3E-1' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/str/pattern.rs.html#638' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-DoubleEndedSearcher%3C%27a%3E-2' class='impl'><code class='in-band'>impl<'a, F> DoubleEndedSearcher<'a> for <a class="struct" href="../../../../../nom/lib/std/str/pattern/struct.CharPredicateSearcher.html" title="struct nom::lib::std::str::pattern::CharPredicateSearcher">CharPredicateSearcher</a><'a, F> <span class="where fmt-newline">where<br> F: <a class="trait" href="../../../../../nom/lib/std/prelude/v1/v1/trait.FnMut.html" title="trait nom::lib::std::prelude::v1::v1::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code><a href='#impl-DoubleEndedSearcher%3C%27a%3E-2' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/str/pattern.rs.html#680' title='goto source code'>[src]</a></h3><div class='impl-items'></div></div><span class='loading-content'>Loading content...</span><script type="text/javascript" src="../../../../../implementors/core/str/pattern/trait.DoubleEndedSearcher.js" async></script></section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../../../../";window.currentCrate = "nom";</script><script src="../../../../../aliases.js"></script><script src="../../../../../main.js"></script><script defer src="../../../../../search-index.js"></script></body></html> |