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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 `Span` struct in crate `proc_macro`."><meta name="keywords" content="rust, rustlang, rust-lang, Span"><title>proc_macro::Span - 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">&#9776;</div><a href='../proc_macro/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 Span</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.def_site">def_site</a><a href="#method.call_site">call_site</a><a href="#method.source_file">source_file</a><a href="#method.parent">parent</a><a href="#method.source">source</a><a href="#method.start">start</a><a href="#method.end">end</a><a href="#method.join">join</a><a href="#method.resolved_at">resolved_at</a><a href="#method.located_at">located_at</a><a href="#method.eq">eq</a><a href="#method.error">error</a><a href="#method.warning">warning</a><a href="#method.note">note</a><a href="#method.help">help</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Copy">Copy</a><a href="#impl-Clone">Clone</a><a href="#impl-Send">!Send</a><a href="#impl-Sync">!Sync</a><a href="#impl-Debug">Debug</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'>proc_macro</a></p><script>window.sidebarCurrent = {name: 'Span', 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'>proc_macro</a>::<wbr><a class="struct" href=''>Span</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version '></span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../src/proc_macro/lib.rs.html#265' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct Span(_);</pre></div><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>A region of source code, along with macro expansion information.</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 class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</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/proc_macro/lib.rs.html#283-382' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.def_site' class="method"><span id='def_site.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.def_site' class='fnname'>def_site</a>() -&gt; <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#286-291' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>A span that resolves at the macro definition site.</p>
</div><h4 id='method.call_site' class="method"><span id='call_site.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.call_site' class='fnname'>call_site</a>() -&gt; <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#298-300' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>The span of the invocation of the current procedural macro.
Identifiers created with this span will be resolved as if they were written
directly at the macro call location (call-site hygiene) and other code
at the macro call site will be able to refer to them as well.</p>
</div><h4 id='method.source_file' class="method"><span id='source_file.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.source_file' class='fnname'>source_file</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro/struct.SourceFile.html" title="struct proc_macro::SourceFile">SourceFile</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#304-308' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>The original source file into which this span points.</p>
</div><h4 id='method.parent' class="method"><span id='parent.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.parent' class='fnname'>parent</a>(&amp;self) -&gt; <a class="enum" href="../core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#313-315' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>The <code>Span</code> for the tokens in the previous macro expansion from which
<code>self</code> was generated from, if any.</p>
</div><h4 id='method.source' class="method"><span id='source.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.source' class='fnname'>source</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#321-323' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>The span for the origin source code that <code>self</code> was generated from. If
this <code>Span</code> wasn't generated from other macro expansions then the return
value is the same as <code>*self</code>.</p>
</div><h4 id='method.start' class="method"><span id='start.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.start' class='fnname'>start</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro/struct.LineColumn.html" title="struct proc_macro::LineColumn">LineColumn</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#327-333' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Get the starting line/column in the source file for this span.</p>
</div><h4 id='method.end' class="method"><span id='end.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.end' class='fnname'>end</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro/struct.LineColumn.html" title="struct proc_macro::LineColumn">LineColumn</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#337-343' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Get the ending line/column in the source file for this span.</p>
</div><h4 id='method.join' class="method"><span id='join.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.join' class='fnname'>join</a>(&amp;self, other: <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a>) -&gt; <a class="enum" href="../core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#349-356' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Create a new span encompassing <code>self</code> and <code>other</code>.</p>
<p>Returns <code>None</code> if <code>self</code> and <code>other</code> are from different files.</p>
</div><h4 id='method.resolved_at' class="method"><span id='resolved_at.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.resolved_at' class='fnname'>resolved_at</a>(&amp;self, other: <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a>) -&gt; <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#361-363' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Creates a new span with the same line/column information as <code>self</code> but
that resolves symbols as though it were at <code>other</code>.</p>
</div><h4 id='method.located_at' class="method"><span id='located_at.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.located_at' class='fnname'>located_at</a>(&amp;self, other: <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a>) -&gt; <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#368-370' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Creates a new span with the same name resolution behavior as <code>self</code> but
with the line/column information of <code>other</code>.</p>
</div><h4 id='method.eq' class="method"><span id='eq.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.eq' class='fnname'>eq</a>(&amp;self, other: &amp;<a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a>) -&gt; <a class="primitive" href="../std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#374-376' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Compares to spans to see if they're equal.</p>
</div><h4 id='method.error' class="method"><span id='error.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.error' class='fnname'>error</a>&lt;T:&nbsp;<a class="trait" href="../core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;<a class="struct" href="../alloc/string/struct.String.html" title="struct alloc::string::String">String</a>&gt;&gt;(self, message: T) -&gt; <a class="struct" href="../proc_macro/struct.Diagnostic.html" title="struct proc_macro::Diagnostic">Diagnostic</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#277-279' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Create a new <code>Diagnostic</code> with the given <code>message</code> at the span
<code>self</code>.</p>
</div><h4 id='method.warning' class="method"><span id='warning.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.warning' class='fnname'>warning</a>&lt;T:&nbsp;<a class="trait" href="../core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;<a class="struct" href="../alloc/string/struct.String.html" title="struct alloc::string::String">String</a>&gt;&gt;(self, message: T) -&gt; <a class="struct" href="../proc_macro/struct.Diagnostic.html" title="struct proc_macro::Diagnostic">Diagnostic</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#277-279' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Create a new <code>Diagnostic</code> with the given <code>message</code> at the span
<code>self</code>.</p>
</div><h4 id='method.note' class="method"><span id='note.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.note' class='fnname'>note</a>&lt;T:&nbsp;<a class="trait" href="../core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;<a class="struct" href="../alloc/string/struct.String.html" title="struct alloc::string::String">String</a>&gt;&gt;(self, message: T) -&gt; <a class="struct" href="../proc_macro/struct.Diagnostic.html" title="struct proc_macro::Diagnostic">Diagnostic</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#277-279' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Create a new <code>Diagnostic</code> with the given <code>message</code> at the span
<code>self</code>.</p>
</div><h4 id='method.help' class="method"><span id='help.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.help' class='fnname'>help</a>&lt;T:&nbsp;<a class="trait" href="../core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;<a class="struct" href="../alloc/string/struct.String.html" title="struct alloc::string::String">String</a>&gt;&gt;(self, message: T) -&gt; <a class="struct" href="../proc_macro/struct.Diagnostic.html" title="struct proc_macro::Diagnostic">Diagnostic</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#277-279' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API.  (<code>proc_macro </code><a href="https://github.com/rust-lang/rust/issues/38356">#38356</a>)</div></div><div class='docblock'><p>Create a new <code>Diagnostic</code> with the given <code>message</code> at the span
<code>self</code>.</p>
</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-Copy' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> for <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code><a href='#impl-Copy' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#264' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Clone' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code><a href='#impl-Clone' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#264' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#264' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a copy of the value. <a href="../core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&amp;mut self, source: <a class="primitive" href="../std/primitive.reference.html">&amp;</a>Self)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='../src/core/clone.rs.html#130-132' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="../core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
</div></div><h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl !<a class="trait" href="../core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#268' title='goto source code'>[src]</a></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 class="trait" href="../core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#270' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#386-393' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='docblock'><p>Prints a span in a form convenient for debugging.</p>
</div><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="../core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="../core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#387-392' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="../core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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                  Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a>
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            <h3 id='impl-Send-1' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl !<a class="trait" href="../core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code><a href='#impl-Send-1' 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-1' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl !<a class="trait" href="../core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../proc_macro/struct.Span.html" title="struct proc_macro::Span">Span</a></code><a href='#impl-Sync-1' 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 this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>&#9166;</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../";window.currentCrate = "proc_macro";</script><script src="../aliases.js"></script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html>