<!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 `fmt` mod in crate `core`."><meta name="keywords" content="rust, rustlang, rust-lang, fmt"><title>core::fmt - 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 fmt</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><li><a href="#functions">Functions</a></li><li><a href="#types">Type Definitions</a></li></ul></div><p class='location'><a href='../index.html'>core</a></p><script>window.sidebarCurrent = {name: 'fmt', 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=''>fmt</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/fmt/mod.rs.html#11-2108' title='goto source code'>[src]</a></span></h1><div class='docblock'><p>Utilities for formatting and printing strings.</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.Arguments.html"
title='struct core::fmt::Arguments'>Arguments</a></td>
<td class='docblock-short'>
<p>This structure represents a safely precompiled version of a format string
and its arguments. This cannot be generated at runtime because it cannot
safely be done, so no constructors are given and the fields are private
to prevent modification.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.DebugList.html"
title='struct core::fmt::DebugList'>DebugList</a></td>
<td class='docblock-short'>
<p>A struct to help with <a href="trait.Debug.html"><code>fmt::Debug</code></a> implementations.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.DebugMap.html"
title='struct core::fmt::DebugMap'>DebugMap</a></td>
<td class='docblock-short'>
<p>A struct to help with <a href="trait.Debug.html"><code>fmt::Debug</code></a> implementations.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.DebugSet.html"
title='struct core::fmt::DebugSet'>DebugSet</a></td>
<td class='docblock-short'>
<p>A struct to help with <a href="trait.Debug.html"><code>fmt::Debug</code></a> implementations.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.DebugStruct.html"
title='struct core::fmt::DebugStruct'>DebugStruct</a></td>
<td class='docblock-short'>
<p>A struct to help with <a href="trait.Debug.html"><code>fmt::Debug</code></a> implementations.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.DebugTuple.html"
title='struct core::fmt::DebugTuple'>DebugTuple</a></td>
<td class='docblock-short'>
<p>A struct to help with <a href="trait.Debug.html"><code>fmt::Debug</code></a> implementations.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.Error.html"
title='struct core::fmt::Error'>Error</a></td>
<td class='docblock-short'>
<p>The error type which is returned from formatting a message into a stream.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="struct" href="struct.Formatter.html"
title='struct core::fmt::Formatter'>Formatter</a></td>
<td class='docblock-short'>
<p>A struct to represent both where to emit formatting strings to and how they
should be formatted. A mutable version of this is passed to all formatting
traits.</p>
</td>
</tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
<table>
<tr class=' module-item'>
<td><a class="enum" href="enum.Alignment.html"
title='enum core::fmt::Alignment'>Alignment</a></td>
<td class='docblock-short'>
<p>Possible alignments returned by <code>Formatter::align</code></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.Binary.html"
title='trait core::fmt::Binary'>Binary</a></td>
<td class='docblock-short'>
<p><code>b</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.Debug.html"
title='trait core::fmt::Debug'>Debug</a></td>
<td class='docblock-short'>
<p><code>?</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.Display.html"
title='trait core::fmt::Display'>Display</a></td>
<td class='docblock-short'>
<p>Format trait for an empty format, <code>{}</code>.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.LowerExp.html"
title='trait core::fmt::LowerExp'>LowerExp</a></td>
<td class='docblock-short'>
<p><code>e</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.LowerHex.html"
title='trait core::fmt::LowerHex'>LowerHex</a></td>
<td class='docblock-short'>
<p><code>x</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.Octal.html"
title='trait core::fmt::Octal'>Octal</a></td>
<td class='docblock-short'>
<p><code>o</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.Pointer.html"
title='trait core::fmt::Pointer'>Pointer</a></td>
<td class='docblock-short'>
<p><code>p</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.UpperExp.html"
title='trait core::fmt::UpperExp'>UpperExp</a></td>
<td class='docblock-short'>
<p><code>E</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.UpperHex.html"
title='trait core::fmt::UpperHex'>UpperHex</a></td>
<td class='docblock-short'>
<p><code>X</code> formatting.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class="trait" href="trait.Write.html"
title='trait core::fmt::Write'>Write</a></td>
<td class='docblock-short'>
<p>A collection of methods that are required to format a message into a stream.</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.write.html"
title='fn core::fmt::write'>write</a></td>
<td class='docblock-short'>
<p>The <code>write</code> function takes an output stream, and an <code>Arguments</code> struct
that can be precompiled with the <code>format_args!</code> macro.</p>
</td>
</tr></table><h2 id='types' class='section-header'><a href="#types">Type Definitions</a></h2>
<table>
<tr class=' module-item'>
<td><a class="type" href="type.Result.html"
title='type core::fmt::Result'>Result</a></td>
<td class='docblock-short'>
<p>The type returned by formatter methods.</p>
</td>
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