13 lines
5.6 KiB
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13 lines
5.6 KiB
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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 `visit` fn in crate `regex_syntax`."><meta name="keywords" content="rust, rustlang, rust-lang, visit"><title>regex_syntax::hir::visit - 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 fn"><!--[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='../../regex_syntax/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'>regex_syntax</a>::<wbr><a href='index.html'>hir</a></p><script>window.sidebarCurrent = {name: 'visit', ty: 'fn', 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 js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" 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/regex_syntax/hir/visitor.rs.html#69-71' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='../index.html'>regex_syntax</a>::<wbr><a href='index.html'>hir</a>::<wbr><a class="fn" href=''>visit</a></span></h1><pre class='rust fn'>pub fn visit<V: <a class="trait" href="../../regex_syntax/hir/trait.Visitor.html" title="trait regex_syntax::hir::Visitor">Visitor</a>>(hir: &<a class="struct" href="../../regex_syntax/hir/struct.Hir.html" title="struct regex_syntax::hir::Hir">Hir</a>, visitor: V) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><V::<a class="type" href="../../regex_syntax/hir/trait.Visitor.html#associatedtype.Output" title="type regex_syntax::hir::Visitor::Output">Output</a>, V::<a class="type" href="../../regex_syntax/hir/trait.Visitor.html#associatedtype.Err" title="type regex_syntax::hir::Visitor::Err">Err</a>></pre><div class='docblock'><p>Executes an implementation of <code>Visitor</code> in constant stack space.</p>
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<p>This function will visit every node in the given <code>Hir</code> while calling
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appropriate methods provided by the
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<a href="trait.Visitor.html"><code>Visitor</code></a> trait.</p>
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<p>The primary use case for this method is when one wants to perform case
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analysis over an <code>Hir</code> without using a stack size proportional to the depth
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of the <code>Hir</code>. Namely, this method will instead use constant stack space,
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but will use heap space proportional to the size of the <code>Hir</code>. This may be
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desirable in cases where the size of <code>Hir</code> is proportional to end user
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input.</p>
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<p>If the visitor returns an error at any point, then visiting is stopped and
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the error is returned.</p>
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