<!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 `alloc` mod in crate `core`."><meta name="keywords" content="rust, rustlang, rust-lang, alloc"><title>core::alloc - 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><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc mod"><!--[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='../../core/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><p class='location'>Module alloc</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#traits">Traits</a></li></ul></div><p class='location'><a href='../index.html'>core</a></p><script>window.sidebarCurrent = {name: 'alloc', ty: 'mod', 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"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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='in-band'>Module <a href='../index.html'>core</a>::<wbr><a class="mod" href=''>alloc</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.28.0'>1.28.0</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='../../src/core/alloc.rs.html#11-1262' title='goto source code'>[src]</a></span></h1><div class='docblock'><p>Memory allocation APIs</p>
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
<table>
<tr class=' module-item'>
<td><a class="struct" href="struct.Layout.html"
title='struct core::alloc::Layout'>Layout</a></td>
<td class='docblock-short'>
<p>Layout of a block of memory.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.LayoutErr.html"
title='struct core::alloc::LayoutErr'>LayoutErr</a></td>
<td class='docblock-short'>
<p>The parameters given to <code>Layout::from_size_align</code>
or some other <code>Layout</code> constructor
do not satisfy its documented constraints.</p>
</td>
</tr>
<tr class='unstable module-item'>
<td><a class="struct" href="struct.AllocErr.html"
title='struct core::alloc::AllocErr'>AllocErr</a></td>
<td class='docblock-short'>
[<div class='stab unstable'>Experimental</div>] <p>The <code>AllocErr</code> error indicates an allocation failure
that may be due to resource exhaustion or to
something wrong when combining the given input arguments with this
allocator.</p>
</td>
</tr>
<tr class='unstable module-item'>
<td><a class="struct" href="struct.CannotReallocInPlace.html"
title='struct core::alloc::CannotReallocInPlace'>CannotReallocInPlace</a></td>
<td class='docblock-short'>
[<div class='stab unstable'>Experimental</div>] <p>The <code>CannotReallocInPlace</code> error is used when <code>grow_in_place</code> or
<code>shrink_in_place</code> were unable to reuse the given memory block for
a requested layout.</p>
</td>
</tr>
<tr class='unstable module-item'>
<td><a class="struct" href="struct.Excess.html"
title='struct core::alloc::Excess'>Excess</a></td>
<td class='docblock-short'>
[<div class='stab unstable'>Experimental</div>] <p>Represents the combination of a starting address and
a total capacity of the returned block.</p>
</td>
</tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
<table>
<tr class='unstable module-item'>
<td><a class="enum" href="enum.CollectionAllocErr.html"
title='enum core::alloc::CollectionAllocErr'>CollectionAllocErr</a></td>
<td class='docblock-short'>
[<div class='stab unstable'>Experimental</div>] <p>Augments <code>AllocErr</code> with a CapacityOverflow variant.</p>
</td>
</tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
<table>
<tr class=' module-item'>
<td><a class="trait" href="trait.GlobalAlloc.html"
title='trait core::alloc::GlobalAlloc'>GlobalAlloc</a></td>
<td class='docblock-short'>
<p>A memory allocator that can be registered as the standard library’s default
though the <code>#[global_allocator]</code> attributes.</p>
</td>
</tr>
<tr class='unstable module-item'>
<td><a class="trait" href="trait.Alloc.html"
title='trait core::alloc::Alloc'>Alloc</a></td>
<td class='docblock-short'>
[<div class='stab unstable'>Experimental</div>] <p>An implementation of <code>Alloc</code> can allocate, reallocate, and
deallocate arbitrary blocks of data described via <code>Layout</code>.</p>
</td>
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