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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 `VariableOutput` trait in crate `digest`."><meta name="keywords" content="rust, rustlang, rust-lang, VariableOutput"><title>digest::VariableOutput - 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='../digest/index.html'><div class='logo-container'><img src='https://raw.githubusercontent.com/RustCrypto/meta/master/logo_small.png' alt='logo'></div></a><p class='location'>Trait VariableOutput</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.new">new</a><a href="#tymethod.output_size">output_size</a><a href="#tymethod.variable_result">variable_result</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='index.html'>digest</a></p><script>window.sidebarCurrent = {name: 'VariableOutput', 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 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/digest/lib.rs.html#70-94' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='index.html'>digest</a>::<wbr><a class="trait" href=''>VariableOutput</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait VariableOutput: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> {
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fn <a href='#tymethod.new' class='fnname'>new</a>(output_size: usize) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, <a class="struct" href="../digest/struct.InvalidOutputSize.html" title="struct digest::InvalidOutputSize">InvalidOutputSize</a>>;
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<div class='item-spacer'></div> fn <a href='#tymethod.output_size' class='fnname'>output_size</a>(&self) -> usize;
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<div class='item-spacer'></div> fn <a href='#tymethod.variable_result' class='fnname'>variable_result</a><F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&[u8])>(self, f: F);
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}</pre></div><div class='docblock'><p>Trait for returning digest result with the variable size</p>
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</div>
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<h2 id='required-methods' class='small-section-header'>Required methods<a href='#required-methods' class='anchor'></a></h2><div class='methods'><h3 id='tymethod.new' class='method'><code id='new.v'>fn <a href='#tymethod.new' class='fnname'>new</a>(output_size: usize) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, <a class="struct" href="../digest/struct.InvalidOutputSize.html" title="struct digest::InvalidOutputSize">InvalidOutputSize</a>></code></h3><div class='docblock'><p>Create new hasher instance with the given output size.</p>
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<p>It will return <code>Err(InvalidOutputSize)</code> in case if hasher can not return
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specified output size. It will always return an error if output size
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equals to zero.</p>
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</div><h3 id='tymethod.output_size' class='method'><code id='output_size.v'>fn <a href='#tymethod.output_size' class='fnname'>output_size</a>(&self) -> usize</code></h3><div class='docblock'><p>Get output size of the hasher instance provided to the <code>new</code> method</p>
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</div><h3 id='tymethod.variable_result' class='method'><code id='variable_result.v'>fn <a href='#tymethod.variable_result' class='fnname'>variable_result</a><F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&[u8])>(self, f: F)</code></h3><div class='docblock'><p>Retrieve result via closure and consume hasher.</p>
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<p>Closure is guaranteed to be called, length of the buffer passed to it
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will be equal to <code>output_size</code>.</p>
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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'></div><span class='loading-content'>Loading content...</span><script type="text/javascript">window.inlined_types=new Set([]);</script><script type="text/javascript" async
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src="../implementors/digest/trait.VariableOutput.js">
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