<!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 `Formatter` struct in crate `alloc`."><meta name="keywords" content="rust, rustlang, rust-lang, Formatter"><title>alloc::fmt::Formatter - 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 struct"><!--[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='../../alloc/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><p class='location'>Struct Formatter</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.pad_integral">pad_integral</a><a href="#method.pad">pad</a><a href="#method.write_str">write_str</a><a href="#method.write_fmt">write_fmt</a><a href="#method.flags">flags</a><a href="#method.fill">fill</a><a href="#method.align">align</a><a href="#method.width">width</a><a href="#method.precision">precision</a><a href="#method.sign_plus">sign_plus</a><a href="#method.sign_minus">sign_minus</a><a href="#method.alternate">alternate</a><a href="#method.sign_aware_zero_pad">sign_aware_zero_pad</a><a href="#method.debug_struct">debug_struct</a><a href="#method.debug_tuple">debug_tuple</a><a href="#method.debug_list">debug_list</a><a href="#method.debug_set">debug_set</a><a href="#method.debug_map">debug_map</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Write">Write</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">!Send</a><a href="#impl-Sync">!Sync</a></div></div><p class='location'><a href='../index.html'>alloc</a>::<wbr><a href='index.html'>fmt</a></p><script>window.sidebarCurrent = {name: 'Formatter', ty: 'struct', 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'>Struct <a href='../index.html'>alloc</a>::<wbr><a href='index.html'>fmt</a>::<wbr><a class="struct" href=''>Formatter</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#250-260' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct Formatter<'a> { /* fields omitted */ }</pre></div><div class='docblock'><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> </div> <h2 id='methods' class='small-section-header'> Methods<a href='#methods' class='anchor'></a> </h2> <h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a> <a class="struct" href="../../alloc/fmt/struct.Formatter.html" title="struct alloc::fmt::Formatter">Formatter</a><'a></code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1062-1743' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.pad_integral' class="method"><span id='pad_integral.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.pad_integral' class='fnname'>pad_integral</a>(<br> &mut self, <br> is_nonnegative: bool, <br> prefix: &str, <br> buf: &str<br>) -> <a class="enum" href="../../core/result/enum.Result.html" title="enum core::result::Result">Result</a><(), <a class="struct" href="../../alloc/fmt/struct.Error.html" title="struct alloc::fmt::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1135-1192' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the correct padding for an integer which has already been emitted into a str. The str should <em>not</em> contain the sign for the integer, that will be added by this method.</p> <h1 id="arguments" class="section-header"><a href="#arguments">Arguments</a></h1> <ul> <li>is_nonnegative - whether the original integer was either positive or zero.</li> <li>prefix - if the '#' character (Alternate) is provided, this is the prefix to put in front of the number.</li> <li>buf - the byte array that the number has been formatted into</li> </ul> <p>This function will correctly account for the flags provided as well as the minimum width. It will not take precision into account.</p> </div><h4 id='method.pad' class="method"><span id='pad.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.pad' class='fnname'>pad</a>(&mut self, s: &str) -> <a class="enum" href="../../core/result/enum.Result.html" title="enum core::result::Result">Result</a><(), <a class="struct" href="../../alloc/fmt/struct.Error.html" title="struct alloc::fmt::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1206-1248' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This function takes a string slice and emits it to the internal buffer after applying the relevant formatting flags specified. The flags recognized for generic strings are:</p> <ul> <li>width - the minimum width of what to emit</li> <li>fill/align - what to emit and where to emit it if the string provided needs to be padded</li> <li>precision - the maximum length to emit, the string is truncated if it is longer than this length</li> </ul> <p>Notably this function ignores the <code>flag</code> parameters.</p> </div><h4 id='method.write_str' class="method"><span id='write_str.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.write_str' class='fnname'>write_str</a>(&mut self, data: &str) -> <a class="enum" href="../../core/result/enum.Result.html" title="enum core::result::Result">Result</a><(), <a class="struct" href="../../alloc/fmt/struct.Error.html" title="struct alloc::fmt::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1367-1369' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Writes some data to the underlying buffer contained within this formatter.</p> </div><h4 id='method.write_fmt' class="method"><span id='write_fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.write_fmt' class='fnname'>write_fmt</a>(&mut self, fmt: <a class="struct" href="../../alloc/fmt/struct.Arguments.html" title="struct alloc::fmt::Arguments">Arguments</a>) -> <a class="enum" href="../../core/result/enum.Result.html" title="enum core::result::Result">Result</a><(), <a class="struct" href="../../alloc/fmt/struct.Error.html" title="struct alloc::fmt::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1373-1375' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Writes some formatted information into this instance</p> </div><h4 id='method.flags' class="method"><span id='flags.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.flags' class='fnname'>flags</a>(&self) -> u32</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1382' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab deprecated'>Deprecated since 1.24.0<p>: use the <code>sign_plus</code>, <code>sign_minus</code>, <code>alternate</code>, or <code>sign_aware_zero_pad</code> methods instead</p> </div></div><div class='docblock'><p>Flags for formatting</p> </div><h4 id='method.fill' class="method"><span id='fill.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.fill' class='fnname'>fill</a>(&self) -> char</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1386' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Character used as 'fill' whenever there is alignment</p> </div><h4 id='method.align' class="method"><span id='align.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.align' class='fnname'>align</a>(&self) -> <a class="enum" href="../../core/fmt/enum.Alignment.html" title="enum core::fmt::Alignment">Alignment</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1391-1398' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>fmt_flags_align </code><a href="https://github.com/rust-lang/rust/issues/27726">#27726</a>)</summary><p>method was just created</p> </details></div></div><div class='docblock'><p>Flag indicating what form of alignment was requested</p> </div><h4 id='method.width' class="method"><span id='width.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.width' class='fnname'>width</a>(&self) -> <a class="enum" href="../../core/option/enum.Option.html" title="enum core::option::Option">Option</a><usize></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1425' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Optionally specified integer width that the output should be.</p> <h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">i32</span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">width</span>) <span class="op">=</span> <span class="ident">formatter</span>.<span class="ident">width</span>() { <span class="comment">// If we received a width, we use it</span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"{:width$}"</span>, <span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"Foo({})"</span>, <span class="self">self</span>.<span class="number">0</span>), <span class="ident">width</span> <span class="op">=</span> <span class="ident">width</span>) } <span class="kw">else</span> { <span class="comment">// Otherwise we do nothing special</span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"Foo({})"</span>, <span class="self">self</span>.<span class="number">0</span>) } } } <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:10}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"Foo(23) "</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"Foo(23)"</span>);</pre> </div><h4 id='method.precision' class="method"><span id='precision.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.precision' class='fnname'>precision</a>(&self) -> <a class="enum" href="../../core/option/enum.Option.html" title="enum core::option::Option">Option</a><usize></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1452' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Optionally specified precision for numeric types.</p> <h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">f32</span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">precision</span>) <span class="op">=</span> <span class="ident">formatter</span>.<span class="ident">precision</span>() { <span class="comment">// If we received a precision, we use it.</span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"Foo({1:.*})"</span>, <span class="ident">precision</span>, <span class="self">self</span>.<span class="number">0</span>) } <span class="kw">else</span> { <span class="comment">// Otherwise we default to 2.</span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"Foo({:.2})"</span>, <span class="self">self</span>.<span class="number">0</span>) } } } <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:.4}"</span>, <span class="ident">Foo</span>(<span class="number">23.2</span>)), <span class="string">"Foo(23.2000)"</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">Foo</span>(<span class="number">23.2</span>)), <span class="string">"Foo(23.20)"</span>);</pre> </div><h4 id='method.sign_plus' class="method"><span id='sign_plus.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sign_plus' class='fnname'>sign_plus</a>(&self) -> bool</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1480' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Determines if the <code>+</code> flag was specified.</p> <h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">i32</span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="kw">if</span> <span class="ident">formatter</span>.<span class="ident">sign_plus</span>() { <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"Foo({}{})"</span>, <span class="kw">if</span> <span class="self">self</span>.<span class="number">0</span> <span class="op"><</span> <span class="number">0</span> { <span class="string">'-'</span> } <span class="kw">else</span> { <span class="string">'+'</span> }, <span class="self">self</span>.<span class="number">0</span>) } <span class="kw">else</span> { <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"Foo({})"</span>, <span class="self">self</span>.<span class="number">0</span>) } } } <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:+}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"Foo(+23)"</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"Foo(23)"</span>);</pre> </div><h4 id='method.sign_minus' class="method"><span id='sign_minus.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sign_minus' class='fnname'>sign_minus</a>(&self) -> bool</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1506' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Determines if the <code>-</code> flag was specified.</p> <h1 id="examples-3" class="section-header"><a href="#examples-3">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">i32</span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="kw">if</span> <span class="ident">formatter</span>.<span class="ident">sign_minus</span>() { <span class="comment">// You want a minus sign? Have one!</span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"-Foo({})"</span>, <span class="self">self</span>.<span class="number">0</span>) } <span class="kw">else</span> { <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"Foo({})"</span>, <span class="self">self</span>.<span class="number">0</span>) } } } <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:-}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"-Foo(23)"</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"Foo(23)"</span>);</pre> </div><h4 id='method.alternate' class="method"><span id='alternate.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.alternate' class='fnname'>alternate</a>(&self) -> bool</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1531' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Determines if the <code>#</code> flag was specified.</p> <h1 id="examples-4" class="section-header"><a href="#examples-4">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">i32</span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="kw">if</span> <span class="ident">formatter</span>.<span class="ident">alternate</span>() { <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"Foo({})"</span>, <span class="self">self</span>.<span class="number">0</span>) } <span class="kw">else</span> { <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"{}"</span>, <span class="self">self</span>.<span class="number">0</span>) } } } <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:#}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"Foo(23)"</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"23"</span>);</pre> </div><h4 id='method.sign_aware_zero_pad' class="method"><span id='sign_aware_zero_pad.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sign_aware_zero_pad' class='fnname'>sign_aware_zero_pad</a>(&self) -> bool</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.5.0'>1.5.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1554-1556' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Determines if the <code>0</code> flag was specified.</p> <h1 id="examples-5" class="section-header"><a href="#examples-5">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">i32</span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">formatter</span>.<span class="ident">sign_aware_zero_pad</span>()); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">formatter</span>.<span class="ident">width</span>(), <span class="prelude-val">Some</span>(<span class="number">4</span>)); <span class="comment">// We ignore the formatter's options.</span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"{}"</span>, <span class="self">self</span>.<span class="number">0</span>) } } <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:04}"</span>, <span class="ident">Foo</span>(<span class="number">23</span>)), <span class="string">"23"</span>);</pre> </div><h4 id='method.debug_struct' class="method"><span id='debug_struct.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.debug_struct' class='fnname'>debug_struct</a>(&'b mut self, name: &str) -> <a class="struct" href="../../alloc/fmt/struct.DebugStruct.html" title="struct alloc::fmt::DebugStruct">DebugStruct</a><'b, 'a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.2.0'>1.2.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1602-1604' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a <a href="../../std/fmt/struct.DebugStruct.html"><code>DebugStruct</code></a> builder designed to assist with creation of <a href="../../std/fmt/trait.Debug.html"><code>fmt::Debug</code></a> implementations for structs.</p> <h1 id="examples-6" class="section-header"><a href="#examples-6">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">net</span>::<span class="ident">Ipv4Addr</span>; <span class="kw">struct</span> <span class="ident">Foo</span> { <span class="ident">bar</span>: <span class="ident">i32</span>, <span class="ident">baz</span>: <span class="ident">String</span>, <span class="ident">addr</span>: <span class="ident">Ipv4Addr</span>, } <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="ident">fmt</span>.<span class="ident">debug_struct</span>(<span class="string">"Foo"</span>) .<span class="ident">field</span>(<span class="string">"bar"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">bar</span>) .<span class="ident">field</span>(<span class="string">"baz"</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">baz</span>) .<span class="ident">field</span>(<span class="string">"addr"</span>, <span class="kw-2">&</span><span class="macro">format_args</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="self">self</span>.<span class="ident">addr</span>)) .<span class="ident">finish</span>() } } <span class="macro">assert_eq</span><span class="macro">!</span>( <span class="string">"Foo { bar: 10, baz: \"Hello World\", addr: 127.0.0.1 }"</span>, <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">Foo</span> { <span class="ident">bar</span>: <span class="number">10</span>, <span class="ident">baz</span>: <span class="string">"Hello World"</span>.<span class="ident">to_string</span>(), <span class="ident">addr</span>: <span class="ident">Ipv4Addr</span>::<span class="ident">new</span>(<span class="number">127</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">1</span>), }) );</pre> </div><h4 id='method.debug_tuple' class="method"><span id='debug_tuple.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.debug_tuple' class='fnname'>debug_tuple</a>(&'b mut self, name: &str) -> <a class="struct" href="../../alloc/fmt/struct.DebugTuple.html" title="struct alloc::fmt::DebugTuple">DebugTuple</a><'b, 'a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.2.0'>1.2.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1633-1635' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a <code>DebugTuple</code> builder designed to assist with creation of <code>fmt::Debug</code> implementations for tuple structs.</p> <h1 id="examples-7" class="section-header"><a href="#examples-7">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">marker</span>::<span class="ident">PhantomData</span>; <span class="kw">struct</span> <span class="ident">Foo</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="ident">i32</span>, <span class="ident">String</span>, <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>); <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Foo</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="ident">fmt</span>.<span class="ident">debug_tuple</span>(<span class="string">"Foo"</span>) .<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>) .<span class="ident">field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">1</span>) .<span class="ident">field</span>(<span class="kw-2">&</span><span class="macro">format_args</span><span class="macro">!</span>(<span class="string">"_"</span>)) .<span class="ident">finish</span>() } } <span class="macro">assert_eq</span><span class="macro">!</span>( <span class="string">"Foo(10, \"Hello\", _)"</span>, <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">Foo</span>(<span class="number">10</span>, <span class="string">"Hello"</span>.<span class="ident">to_string</span>(), <span class="ident">PhantomData</span>::<span class="op"><</span><span class="ident">u8</span><span class="op">></span>)) );</pre> </div><h4 id='method.debug_list' class="method"><span id='debug_list.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.debug_list' class='fnname'>debug_list</a>(&'b mut self) -> <a class="struct" href="../../alloc/fmt/struct.DebugList.html" title="struct alloc::fmt::DebugList">DebugList</a><'b, 'a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.2.0'>1.2.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1657-1659' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a <code>DebugList</code> builder designed to assist with creation of <code>fmt::Debug</code> implementations for list-like structures.</p> <h1 id="examples-8" class="section-header"><a href="#examples-8">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="ident">fmt</span>.<span class="ident">debug_list</span>().<span class="ident">entries</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">iter</span>()).<span class="ident">finish</span>() } } <span class="comment">// prints "[10, 11]"</span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">Foo</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">10</span>, <span class="number">11</span>]));</pre> </div><h4 id='method.debug_set' class="method"><span id='debug_set.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.debug_set' class='fnname'>debug_set</a>(&'b mut self) -> <a class="struct" href="../../alloc/fmt/struct.DebugSet.html" title="struct alloc::fmt::DebugSet">DebugSet</a><'b, 'a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.2.0'>1.2.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1716-1718' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a <code>DebugSet</code> builder designed to assist with creation of <code>fmt::Debug</code> implementations for set-like structures.</p> <h1 id="examples-9" class="section-header"><a href="#examples-9">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="ident">fmt</span>.<span class="ident">debug_set</span>().<span class="ident">entries</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">iter</span>()).<span class="ident">finish</span>() } } <span class="comment">// prints "{10, 11}"</span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">Foo</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">10</span>, <span class="number">11</span>]));</pre> <p>In this more complex example, we use <a href="../../std/macro.format_args.html"><code>format_args!</code></a> and <code>.debug_set()</code> to build a list of match arms:</p> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Arm</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">L</span>: <span class="lifetime">'a</span>, <span class="ident">R</span>: <span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> (<span class="ident">L</span>, <span class="ident">R</span>)); <span class="kw">struct</span> <span class="ident">Table</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>: <span class="lifetime">'a</span>, <span class="ident">V</span>: <span class="lifetime">'a</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> [(<span class="ident">K</span>, <span class="ident">V</span>)], <span class="ident">V</span>); <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">L</span>, <span class="ident">R</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Arm</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">L</span>, <span class="ident">R</span><span class="op">></span> <span class="kw">where</span> <span class="ident">L</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span>, <span class="ident">R</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="ident">L</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span>(<span class="self">self</span>.<span class="number">0</span>).<span class="number">0</span>, <span class="ident">fmt</span>)<span class="question-mark">?</span>; <span class="ident">fmt</span>.<span class="ident">write_str</span>(<span class="string">" => "</span>)<span class="question-mark">?</span>; <span class="ident">R</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span>(<span class="self">self</span>.<span class="number">0</span>).<span class="number">1</span>, <span class="ident">fmt</span>) } } <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">V</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Table</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">V</span><span class="op">></span> <span class="kw">where</span> <span class="ident">K</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span>, <span class="ident">V</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="ident">fmt</span>.<span class="ident">debug_set</span>() .<span class="ident">entries</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="ident">Arm</span>)) .<span class="ident">entry</span>(<span class="kw-2">&</span><span class="ident">Arm</span>(<span class="kw-2">&</span>(<span class="macro">format_args</span><span class="macro">!</span>(<span class="string">"_"</span>), <span class="kw-2">&</span><span class="self">self</span>.<span class="number">1</span>))) .<span class="ident">finish</span>() } }</pre> </div><h4 id='method.debug_map' class="method"><span id='debug_map.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.debug_map' class='fnname'>debug_map</a>(&'b mut self) -> <a class="struct" href="../../alloc/fmt/struct.DebugMap.html" title="struct alloc::fmt::DebugMap">DebugMap</a><'b, 'a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.2.0'>1.2.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1740-1742' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a <code>DebugMap</code> builder designed to assist with creation of <code>fmt::Debug</code> implementations for map-like structures.</p> <h1 id="examples-10" class="section-header"><a href="#examples-10">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">struct</span> <span class="ident">Foo</span>(<span class="ident">Vec</span><span class="op"><</span>(<span class="ident">String</span>, <span class="ident">i32</span>)<span class="op">></span>); <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Foo</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="ident">fmt</span>.<span class="ident">debug_map</span>().<span class="ident">entries</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="kw-2">&</span>(<span class="kw-2">ref</span> <span class="ident">k</span>, <span class="kw-2">ref</span> <span class="ident">v</span>)<span class="op">|</span> (<span class="ident">k</span>, <span class="ident">v</span>))).<span class="ident">finish</span>() } } <span class="comment">// prints "{"A": 10, "B": 11}"</span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">Foo</span>(<span class="macro">vec</span><span class="macro">!</span>[(<span class="string">"A"</span>.<span class="ident">to_string</span>(), <span class="number">10</span>), (<span class="string">"B"</span>.<span class="ident">to_string</span>(), <span class="number">11</span>)]));</pre> </div></div> <h2 id='implementations' class='small-section-header'> Trait Implementations<a href='#implementations' class='anchor'></a> </h2> <div id='implementations-list'><h3 id='impl-Write' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a> <a class="trait" href="../../alloc/fmt/trait.Write.html" title="trait alloc::fmt::Write">Write</a> for <a class="struct" href="../../alloc/fmt/struct.Formatter.html" title="struct alloc::fmt::Formatter">Formatter</a><'a></code><a href='#impl-Write' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.2.0'>1.2.0</div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1746-1758' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.write_str-1' class="method"><span id='write_str.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../alloc/fmt/trait.Write.html#tymethod.write_str' class='fnname'>write_str</a>(&mut self, s: &str) -> <a class="enum" href="../../core/result/enum.Result.html" title="enum core::result::Result">Result</a><(), <a class="struct" href="../../alloc/fmt/struct.Error.html" title="struct alloc::fmt::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1747-1749' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Writes a slice of bytes into this writer, returning whether the write succeeded. <a href="../../alloc/fmt/trait.Write.html#tymethod.write_str">Read more</a></p> </div><h4 id='method.write_char' class="method"><span id='write_char.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../alloc/fmt/trait.Write.html#method.write_char' class='fnname'>write_char</a>(&mut self, c: char) -> <a class="enum" href="../../core/result/enum.Result.html" title="enum core::result::Result">Result</a><(), <a class="struct" href="../../alloc/fmt/struct.Error.html" title="struct alloc::fmt::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1751-1753' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Writes a [<code>char</code>] into this writer, returning whether the write succeeded. <a href="../../alloc/fmt/trait.Write.html#method.write_char">Read more</a></p> </div><h4 id='method.write_fmt-1' class="method"><span id='write_fmt.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../alloc/fmt/trait.Write.html#method.write_fmt' class='fnname'>write_fmt</a>(&mut self, args: <a class="struct" href="../../alloc/fmt/struct.Arguments.html" title="struct alloc::fmt::Arguments">Arguments</a>) -> <a class="enum" href="../../core/result/enum.Result.html" title="enum core::result::Result">Result</a><(), <a class="struct" href="../../alloc/fmt/struct.Error.html" title="struct alloc::fmt::Error">Error</a>></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/core/fmt/mod.rs.html#1755-1757' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Glue for usage of the [<code>write!</code>] macro with implementors of this trait. <a href="../../alloc/fmt/trait.Write.html#method.write_fmt">Read more</a></p> </div></div></div> <h2 id='synthetic-implementations' class='small-section-header'> Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a> </h2> <div id='synthetic-implementations-list'> <h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a> !<a class="trait" href="../../core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../../alloc/fmt/struct.Formatter.html" title="struct alloc::fmt::Formatter">Formatter</a><'a></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a> !<a class="trait" href="../../core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../../alloc/fmt/struct.Formatter.html" title="struct alloc::fmt::Formatter">Formatter</a><'a></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show 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