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struct.Group.html

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  1. <!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 `Group` struct in crate `proc_macro2`."><meta name="keywords" content="rust, rustlang, rust-lang, Group"><title>proc_macro2::Group - 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></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><p class='location'>Struct Group</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.delimiter">delimiter</a><a href="#method.stream">stream</a><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%3CGroup%3E">From&lt;Group&gt;</a><a href="#impl-Clone">Clone</a><a href="#impl-Display">Display</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_macro2</a></p><script>window.sidebarCurrent = {name: 'Group', 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_macro2</a>::<wbr><a class="struct" href=''>Group</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>]</a></span><a class='srclink' href='../src/proc_macro2/lib.rs.html#499-503' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct Group { /* fields omitted */ }</pre></div><div class='docblock'><p>A delimited token stream.</p>
    2. 

  2. <p>A <code>Group</code> internally contains a <code>TokenStream</code> which is surrounded by
    3. 

  3. <code>Delimiter</code>s.</p>
    4. 

  4. </div>
    5. 

  5.                     <h2 id='methods' class='small-section-header'>
    6. 

  6.                       Methods<a href='#methods' class='anchor'></a>
    7. 

  7.                     </h2>
    8. 

  8.                 <h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</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_macro2/lib.rs.html#524-566' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.new' class='fnname'>new</a>(delimiter: <a class="enum" href="../proc_macro2/enum.Delimiter.html" title="enum proc_macro2::Delimiter">Delimiter</a>, stream: <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a>) -&gt; <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#530-536' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a new <code>Group</code> with the given delimiter and token stream.</p>
    9. 

  9. <p>This constructor will set the span for this group to
    10. 

  10. <code>Span::call_site()</code>. To change the span you can use the <code>set_span</code>
    11. 

  11. method below.</p>
    12. 

  12. </div><h4 id='method.delimiter' class="method"><span id='delimiter.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.delimiter' class='fnname'>delimiter</a>(&amp;self) -&gt; <a class="enum" href="../proc_macro2/enum.Delimiter.html" title="enum proc_macro2::Delimiter">Delimiter</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#539-541' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the delimiter of this <code>Group</code></p>
    13. 

  13. </div><h4 id='method.stream' class="method"><span id='stream.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.stream' class='fnname'>stream</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#547-549' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the <code>TokenStream</code> of tokens that are delimited in this <code>Group</code>.</p>
    14. 

  14. <p>Note that the returned token stream does not include the delimiter
    15. 

  15. returned above.</p>
    16. 

  16. </div><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_macro2/struct.Span.html" title="struct proc_macro2::Span">Span</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#553-555' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the span for the delimiters of this token stream, spanning the
    17. 

  17. entire <code>Group</code>.</p>
    18. 

  18. </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_macro2/struct.Span.html" title="struct proc_macro2::Span">Span</a>)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#563-565' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Configures the span for this <code>Group</code>'s delimiters, but not its internal
    19. 

  19. tokens.</p>
    20. 

  20. <p>This method will <strong>not</strong> set the span of all the internal tokens spanned
    21. 

  21. by this group, but rather it will only set the span of the delimiter
    22. 

  22. tokens at the level of the <code>Group</code>.</p>
    23. 

  23. </div></div>
    24. 

  24.                 <h2 id='implementations' class='small-section-header'>
    25. 

  25.                   Trait Implementations<a href='#implementations' class='anchor'></a>
    26. 

  26.                 </h2>
    27. 

  27.                 <div id='implementations-list'><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="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></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#435-439' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><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='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></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#436-438' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs the conversion.</p>
    28. 

  28. </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="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</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_macro2/lib.rs.html#498' 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='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#498' title='goto source code'>[src]</a></td></tr></tbody></table></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>
    29. 

  29. </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='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></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='https://doc.rust-lang.org/nightly/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="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
    30. 

  30. </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="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> for <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</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_macro2/lib.rs.html#571-586' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='docblock'><p>Prints the group as a string that should be losslessly convertible back
    31. 

  31. into the same group (modulo spans), except for possibly <code>TokenTree::Group</code>s
    32. 

  32. with <code>Delimiter::None</code> delimiters.</p>
    33. 

  33. </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='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></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#572-585' 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="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></p>
    34. 

  34. </div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><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="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</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_macro2/lib.rs.html#588-597' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><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='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, fmt: &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></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/proc_macro2/lib.rs.html#589-596' 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="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
    35. 

  35. </div></div></div>
    36. 

  36.                 <h2 id='synthetic-implementations' class='small-section-header'>
    37. 

  37.                   Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a>
    38. 

  38.                 </h2>
    39. 

  39.                 <div id='synthetic-implementations-list'>
    40. 

  40.             <h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl !<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</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 class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</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 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_macro2";</script><script src="../aliases.js"></script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html>
    41.