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<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-Extend%3CTokenTree%3E">Extend&lt;TokenTree&gt;</a><a href="#impl-FromIterator%3CTokenTree%3E">FromIterator&lt;TokenTree&gt;</a><a href="#impl-Clone">Clone</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><a href="#impl-Debug">Debug</a></div></div><p class='location'><a href='index.html'>proc_macro2</a></p><script>window.sidebarCurrent = {name: 'TokenTree', ty: 'enum', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Enum <a href='index.html'>proc_macro2</a>::<wbr><a class="enum" href=''>TokenTree</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>&#x2212;</span>]
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</span><a class='srclink' href='../src/proc_macro2/lib.rs.html#396-405' title='goto source code'>[src]</a></span></h1>
<pre class='rust enum'>pub enum TokenTree {
Group(<a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a>),
Ident(<a class="struct" href="../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>),
Punct(<a class="struct" href="../proc_macro2/struct.Punct.html" title="struct proc_macro2::Punct">Punct</a>),
Literal(<a class="struct" href="../proc_macro2/struct.Literal.html" title="struct proc_macro2::Literal">Literal</a>),
}</pre><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_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a>)</code></span></span><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_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>)</code></span></span><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_macro2/struct.Punct.html" title="struct proc_macro2::Punct">Punct</a>)</code></span></span><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_macro2/struct.Literal.html" title="struct proc_macro2::Literal">Literal</a>)</code></span></span><div class='docblock'><p>A literal character (<code>'a'</code>), string (<code>&quot;hello&quot;</code>), number (<code>2.3</code>), etc.</p>
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<h2 id='methods' class='small-section-header'>
Methods<a href='#methods' class='anchor'></a>
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<h3 id='impl' class='impl'><span class='in-band'><code>impl <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#407-432' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.span' class="method"><span id='span.v' class='invisible'><code>pub fn <a href='#method.span' class='fnname'>span</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro2/struct.Span.html" title="struct proc_macro2::Span">Span</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#410-417' title='goto source code'>[src]</a></span></h4>
<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'><code>pub fn <a href='#method.set_span' class='fnname'>set_span</a>(&amp;mut self, span: <a class="struct" href="../proc_macro2/struct.Span.html" title="struct proc_macro2::Span">Span</a>)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#424-431' title='goto source code'>[src]</a></span></h4>
<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>
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<h3 id='impl-Extend%3CTokenTree%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.Extend.html" title="trait core::iter::traits::Extend">Extend</a>&lt;<a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a>&gt; for <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a></code><a href='#impl-Extend%3CTokenTree%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#166-170' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.extend' class="method"><span id='extend.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/iter/traits/trait.Extend.html#tymethod.extend' class='fnname'>extend</a>&lt;I:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html" title="trait core::iter::traits::IntoIterator">IntoIterator</a>&lt;Item = <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a>&gt;&gt;(&amp;mut self, streams: I)</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#167-169' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Extends a collection with the contents of an iterator. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.Extend.html#tymethod.extend">Read more</a></p>
</div></div><h3 id='impl-FromIterator%3CTokenTree%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.FromIterator.html" title="trait core::iter::traits::FromIterator">FromIterator</a>&lt;<a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a>&gt; for <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a></code><a href='#impl-FromIterator%3CTokenTree%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#180-184' title='goto source code'>[src]</a></span></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'><code>fn <a href='https://doc.rust-lang.org/nightly/core/iter/traits/trait.FromIterator.html#tymethod.from_iter' class='fnname'>from_iter</a>&lt;I:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html" title="trait core::iter::traits::IntoIterator">IntoIterator</a>&lt;Item = <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a>&gt;&gt;(streams: I) -&gt; Self</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#181-183' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Creates a value from an iterator. <a href="https://doc.rust-lang.org/nightly/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'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl-Clone' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#395' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#395' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/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'><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self)</code></span><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='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#112-114' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
</div></div><h3 id='impl-From%3CGroup%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a>&gt; for <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl-From%3CGroup%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#434-438' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.from' class="method"><span id='from.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a>) -&gt; <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#435-437' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-From%3CIdent%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>&gt; for <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl-From%3CIdent%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#440-444' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.from-1' class="method"><span id='from.v-1' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro2/struct.Ident.html" title="struct proc_macro2::Ident">Ident</a>) -&gt; <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#441-443' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-From%3CPunct%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro2/struct.Punct.html" title="struct proc_macro2::Punct">Punct</a>&gt; for <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl-From%3CPunct%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#446-450' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.from-2' class="method"><span id='from.v-2' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro2/struct.Punct.html" title="struct proc_macro2::Punct">Punct</a>) -&gt; <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#447-449' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-From%3CLiteral%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;<a class="struct" href="../proc_macro2/struct.Literal.html" title="struct proc_macro2::Literal">Literal</a>&gt; for <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl-From%3CLiteral%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#452-456' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.from-3' class="method"><span id='from.v-3' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(g: <a class="struct" href="../proc_macro2/struct.Literal.html" title="struct proc_macro2::Literal">Literal</a>) -&gt; <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#453-455' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Performs the conversion.</p>
</div></div><h3 id='impl-Display' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> for <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl-Display' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#462-471' title='goto source code'>[src]</a></span></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' class="method"><span id='fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#463-470' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></p>
</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="enum" href="../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></code><a href='#impl-Debug' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#474-491' title='goto source code'>[src]</a></span></h3>
<div class='docblock'><p>Prints token tree in a form convenient for debugging.</p>
</div><div class='impl-items'><h4 id='method.fmt-1' class="method"><span id='fmt.v-1' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#475-490' title='goto source code'>[src]</a></span></h4>
<div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div></section>
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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>
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