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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 `TokenTree` enum in crate `proc_macro`."><meta name="keywords" content="rust, rustlang, rust-lang, TokenTree"><title>proc_macro::TokenTree - 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 enum"><!--[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'>Enum TokenTree</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#variants">Variants</a><div class="sidebar-links"><a href="#variant.Group">Group</a><a href="#variant.Ident">Ident</a><a href="#variant.Punct">Punct</a><a href="#variant.Literal">Literal</a></div><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.span">span</a><a href="#method.set_span">set_span</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-From%3CTokenTree%3E">From&lt;TokenTree&gt;</a><a href="#impl-FromIterator%3CTokenTree%3E">FromIterator&lt;TokenTree&gt;</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><a href="#impl-From%3CGroup%3E">From&lt;Group&gt;</a><a href="#impl-From%3CIdent%3E">From&lt;Ident&gt;</a><a href="#impl-From%3CPunct%3E">From&lt;Punct&gt;</a><a href="#impl-From%3CLiteral%3E">From&lt;Literal&gt;</a><a href="#impl-Display">Display</a></div></div><p class='location'><a href='index.html'>proc_macro</a></p><script>window.sidebarCurrent = {name: 'TokenTree', ty: 'enum', 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'>Enum <a href='index.html'>proc_macro</a>::<wbr><a class="enum" href=''>TokenTree</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#489-498' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust enum'>pub enum TokenTree {
    Group(<a class="struct" href="../proc_macro/struct.Group.html" title="struct proc_macro::Group">Group</a>),
    Ident(<a class="struct" href="../proc_macro/struct.Ident.html" title="struct proc_macro::Ident">Ident</a>),
    Punct(<a class="struct" href="../proc_macro/struct.Punct.html" title="struct proc_macro::Punct">Punct</a>),
    Literal(<a class="struct" href="../proc_macro/struct.Literal.html" title="struct proc_macro::Literal">Literal</a>),
}</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 single token or a delimited sequence of token trees (e.g. <code>[1, (), ..]</code>).</p>
</div><h2 id='variants' class='variants small-section-header'>
                   Variants<a href='#variants' class='anchor'></a></h2>
<span id="variant.Group" class="variant small-section-header"><a href="#variant.Group" class="anchor field"></a><span id='Group.v' class='invisible'><code>Group(<a class="struct" href="../proc_macro/struct.Group.html" title="struct proc_macro::Group">Group</a>)</code></span></span><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 token stream surrounded by bracket delimiters.</p>
</div><span id="variant.Ident" class="variant small-section-header"><a href="#variant.Ident" class="anchor field"></a><span id='Ident.v' class='invisible'><code>Ident(<a class="struct" href="../proc_macro/struct.Ident.html" title="struct proc_macro::Ident">Ident</a>)</code></span></span><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>An identifier.</p>
</div><span id="variant.Punct" class="variant small-section-header"><a href="#variant.Punct" class="anchor field"></a><span id='Punct.v' class='invisible'><code>Punct(<a class="struct" href="../proc_macro/struct.Punct.html" title="struct proc_macro::Punct">Punct</a>)</code></span></span><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 single punctuation character (<code>+</code>, <code>,</code>, <code>$</code>, etc.).</p>
</div><span id="variant.Literal" class="variant small-section-header"><a href="#variant.Literal" class="anchor field"></a><span id='Literal.v' class='invisible'><code>Literal(<a class="struct" href="../proc_macro/struct.Literal.html" title="struct proc_macro::Literal">Literal</a>)</code></span></span><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 literal character (<code>'a'</code>), string (<code>&quot;hello&quot;</code>), number (<code>2.3</code>), etc.</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="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</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#505-532' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.span' class="method"><span id='span.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.span' class='fnname'>span</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#509-516' 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>Returns the span of this tree, delegating to the <code>span</code> method of
the contained token or a delimited stream.</p>
</div><h4 id='method.set_span' class="method"><span id='set_span.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.set_span' class='fnname'>set_span</a>(&amp;mut self, span: <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#524-531' 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>Configures the span for <em>only this token</em>.</p>
<p>Note that if this token is a <code>Group</code> then this method will not configure
the span of each of the internal tokens, this will simply delegate to
the <code>set_span</code> method of each variant.</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-From%3CTokenTree%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a>&gt; for <a class="struct" href="../proc_macro/struct.TokenStream.html" title="struct proc_macro::TokenStream">TokenStream</a></code><a href='#impl-From%3CTokenTree%3E' 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#156-160' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='docblock'><p>Creates a token stream containing a single token tree.</p>
</div><div class='impl-items'><h4 id='method.from' class="method"><span id='from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(tree: <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a>) -&gt; <a class="struct" href="../proc_macro/struct.TokenStream.html" title="struct proc_macro::TokenStream">TokenStream</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#157-159' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-FromIterator%3CTokenTree%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/iter/traits/trait.FromIterator.html" title="trait core::iter::traits::FromIterator">FromIterator</a>&lt;<a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a>&gt; for <a class="struct" href="../proc_macro/struct.TokenStream.html" title="struct proc_macro::TokenStream">TokenStream</a></code><a href='#impl-FromIterator%3CTokenTree%3E' 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#164-168' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='docblock'><p>Collects a number of token trees into a single stream.</p>
</div><div class='impl-items'><h4 id='method.from_iter' class="method"><span id='from_iter.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/iter/traits/trait.FromIterator.html#tymethod.from_iter' class='fnname'>from_iter</a>&lt;I:&nbsp;<a class="trait" href="../core/iter/traits/trait.IntoIterator.html" title="trait core::iter::traits::IntoIterator">IntoIterator</a>&lt;Item = <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a>&gt;&gt;(trees: I) -&gt; Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#165-167' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a value from an iterator. <a href="../core/iter/traits/trait.FromIterator.html#tymethod.from_iter">Read more</a></p>
</div></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="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</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#488' 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="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#488' 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="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</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#501' 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="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</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#503' 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="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</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#536-547' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='docblock'><p>Prints token treee 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#537-546' 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>
</div></div><h3 id='impl-From%3CGroup%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro/struct.Group.html" title="struct proc_macro::Group">Group</a>&gt; for <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code><a href='#impl-From%3CGroup%3E' 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#550-554' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-1' class="method"><span id='from.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro/struct.Group.html" title="struct proc_macro::Group">Group</a>) -&gt; <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#551-553' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-From%3CIdent%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro/struct.Ident.html" title="struct proc_macro::Ident">Ident</a>&gt; for <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code><a href='#impl-From%3CIdent%3E' 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#557-561' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-2' class="method"><span id='from.v-2' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro/struct.Ident.html" title="struct proc_macro::Ident">Ident</a>) -&gt; <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#558-560' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-From%3CPunct%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro/struct.Punct.html" title="struct proc_macro::Punct">Punct</a>&gt; for <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code><a href='#impl-From%3CPunct%3E' 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#564-568' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-3' class="method"><span id='from.v-3' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro/struct.Punct.html" title="struct proc_macro::Punct">Punct</a>) -&gt; <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#565-567' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-From%3CLiteral%3E' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro/struct.Literal.html" title="struct proc_macro::Literal">Literal</a>&gt; for <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code><a href='#impl-From%3CLiteral%3E' 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#571-575' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.from-4' class="method"><span id='from.v-4' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro/struct.Literal.html" title="struct proc_macro::Literal">Literal</a>) -&gt; <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro/lib.rs.html#572-574' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-Display' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> for <a class="enum" href="../proc_macro/enum.TokenTree.html" title="enum proc_macro::TokenTree">TokenTree</a></code><a href='#impl-Display' 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#581-590' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='docblock'><p>Prints the token tree as a string that is supposed to be losslessly convertible back
into the same token tree (modulo spans), except for possibly <code>TokenTree::Group</code>s
with <code>Delimiter::None</code> delimiters and negative numeric literals.</p>
</div><div class='impl-items'><h4 id='method.fmt-1' class="method"><span id='fmt.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../core/fmt/trait.Display.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#582-589' 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.Display.html#tymethod.fmt">Read more</a></p>
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