<!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 `ptr` mod in crate `std`."><meta name="keywords" content="rust, rustlang, rust-lang, ptr"><title>std::ptr - 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='../../std/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 ptr</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'><a href='../index.html'>std</a></p><script>window.sidebarCurrent = {name: 'ptr', 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'>std</a>::<wbr><a class="mod" href=''>ptr</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</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/lib.rs.html#174' title='goto source code'>[src]</a></span></h1><div class='docblock'><p>Raw, unsafe pointers, <code>*const T</code>, and <code>*mut T</code>.</p>
<p><em><a href="../../std/primitive.pointer.html">See also the pointer primitive types</a>.</em></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.NonNull.html"
title='struct std::ptr::NonNull'>NonNull</a></td>
<td class='docblock-short'>
<p><code>*mut T</code> but non-zero and covariant.</p>
</td>
</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
<table>
<tr class=' module-item'>
<td><a class="fn" href="fn.copy.html"
title='fn std::ptr::copy'>copy</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Copies <code>count * size_of<T></code> bytes from <code>src</code> to <code>dst</code>. The source
and destination may overlap.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.copy_nonoverlapping.html"
title='fn std::ptr::copy_nonoverlapping'>copy_nonoverlapping</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Copies <code>count * size_of<T></code> bytes from <code>src</code> to <code>dst</code>. The source
and destination may <em>not</em> overlap.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.drop_in_place.html"
title='fn std::ptr::drop_in_place'>drop_in_place</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Executes the destructor (if any) of the pointed-to value.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.eq.html"
title='fn std::ptr::eq'>eq</a></td>
<td class='docblock-short'>
<p>Compare raw pointers for equality.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.null.html"
title='fn std::ptr::null'>null</a></td>
<td class='docblock-short'>
<p>Creates a null raw pointer.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.null_mut.html"
title='fn std::ptr::null_mut'>null_mut</a></td>
<td class='docblock-short'>
<p>Creates a null mutable raw pointer.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.read.html"
title='fn std::ptr::read'>read</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Reads the value from <code>src</code> without moving it. This leaves the
memory in <code>src</code> unchanged.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.read_unaligned.html"
title='fn std::ptr::read_unaligned'>read_unaligned</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Reads the value from <code>src</code> without moving it. This leaves the
memory in <code>src</code> unchanged.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.read_volatile.html"
title='fn std::ptr::read_volatile'>read_volatile</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Performs a volatile read of the value from <code>src</code> without moving it. This
leaves the memory in <code>src</code> unchanged.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.replace.html"
title='fn std::ptr::replace'>replace</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Moves <code>src</code> into the pointed <code>dest</code>, returning the previous <code>dest</code> value.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.swap.html"
title='fn std::ptr::swap'>swap</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Swaps the values at two mutable locations of the same type, without
deinitializing either.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.swap_nonoverlapping.html"
title='fn std::ptr::swap_nonoverlapping'>swap_nonoverlapping</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Swaps a sequence of values at two mutable locations of the same type.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.write.html"
title='fn std::ptr::write'>write</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Overwrites a memory location with the given value without reading or
dropping the old value.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.write_bytes.html"
title='fn std::ptr::write_bytes'>write_bytes</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Invokes memset on the specified pointer, setting <code>count * size_of::<T>()</code>
bytes of memory starting at <code>dst</code> to <code>val</code>.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.write_unaligned.html"
title='fn std::ptr::write_unaligned'>write_unaligned</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Overwrites a memory location with the given value without reading or
dropping the old value.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="fn" href="fn.write_volatile.html"
title='fn std::ptr::write_volatile'>write_volatile</a><a title='unsafe function' href='#'><sup>⚠</sup></a></td>
<td class='docblock-short'>
<p>Performs a volatile write of a memory location with the given value without
reading or dropping the old value.</p>
</td>
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