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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 `BlockRngCore` trait in crate `rand_core`."><meta name="keywords" content="rust, rustlang, rust-lang, BlockRngCore"><title>rand_core::block::BlockRngCore - 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="https://www.rust-lang.org/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='../../rand_core/index.html'><div class='logo-container'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk.png' alt='logo'></div></a><p class='location'>Trait BlockRngCore</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#associated-types">Associated Types</a><div class="sidebar-links"><a href="#associatedtype.Item">Item</a><a href="#associatedtype.Results">Results</a></div><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.generate">generate</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>rand_core</a>::<wbr><a href='index.html'>block</a></p><script>window.sidebarCurrent = {name: 'BlockRngCore', 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/rand_core/block.rs.html#63-73' title='goto source code'>[src]</a></span><span class='in-band'>Trait <a href='../index.html'>rand_core</a>::<wbr><a href='index.html'>block</a>::<wbr><a class="trait" href=''>BlockRngCore</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait BlockRngCore {
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type <a href='#associatedtype.Item' class="type">Item</a>;
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type <a href='#associatedtype.Results' class="type">Results</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>Self::<a class="type" href="../../rand_core/block/trait.BlockRngCore.html#associatedtype.Item" title="type rand_core::block::BlockRngCore::Item">Item</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>Self::<a class="type" href="../../rand_core/block/trait.BlockRngCore.html#associatedtype.Item" title="type rand_core::block::BlockRngCore::Item">Item</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>>;
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fn <a href='#tymethod.generate' class='fnname'>generate</a>(&mut self, results: &mut Self::<a class="type" href="../../rand_core/block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>);
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}</pre></div><div class='docblock'><p>A trait for RNGs which do not generate random numbers individually, but in
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blocks (typically <code>[u32; N]</code>). This technique is commonly used by
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cryptographic RNGs to improve performance.</p>
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<p>See the [module][crate::block] documentation for details.</p>
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</div>
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<h2 id='associated-types' class='small-section-header'>Associated Types<a href='#associated-types' class='anchor'></a></h2><div class='methods'><h3 id='associatedtype.Item' class='method'><code id='Item.t'>type <a href='#associatedtype.Item' class="type">Item</a></code></h3><div class='docblock'><p>Results element type, e.g. <code>u32</code>.</p>
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</div><h3 id='associatedtype.Results' class='method'><code id='Results.t'>type <a href='#associatedtype.Results' class="type">Results</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>Self::<a class="type" href="../../rand_core/block/trait.BlockRngCore.html#associatedtype.Item" title="type rand_core::block::BlockRngCore::Item">Item</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsMut.html" title="trait core::convert::AsMut">AsMut</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>Self::<a class="type" href="../../rand_core/block/trait.BlockRngCore.html#associatedtype.Item" title="type rand_core::block::BlockRngCore::Item">Item</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>></code></h3><div class='docblock'><p>Results type. This is the 'block' an RNG implementing <code>BlockRngCore</code>
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generates, which will usually be an array like <code>[u32; 16]</code>.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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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.generate' class='method'><code id='generate.v'>fn <a href='#tymethod.generate' class='fnname'>generate</a>(&mut self, results: &mut Self::<a class="type" href="../../rand_core/block/trait.BlockRngCore.html#associatedtype.Results" title="type rand_core::block::BlockRngCore::Results">Results</a>)</code></h3><div class='docblock'><p>Generate a new block of results.</p>
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</div></div><span class='loading-content'>Loading content...</span>
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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/rand_core/block/trait.BlockRngCore.js">
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