syn/token/trait.Token.html

<!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="Marker trait for types that represent single tokens."><title>Token in syn::token - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-84e720fa.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="syn" data-themes="" data-resource-suffix="" data-rustdoc-version="1.89.0 (29483883e 2025-08-04)" data-channel="1.89.0" data-search-js="search-92309212.js" data-settings-js="settings-5514c975.js" ><script src="../../static.files/storage-4e99c027.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-fd3af306.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-32bb7600.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../syn/index.html">syn</a><span class="version">2.0.106</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Token</a></h2><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-Token-for-Group" title="Group">Group</a></li><li><a href="#impl-Token-for-Literal" title="Literal">Literal</a></li><li><a href="#impl-Token-for-Punct" title="Punct">Punct</a></li><li><a href="#impl-Token-for-TokenTree" title="TokenTree">TokenTree</a></li></ul><h3><a href="#dyn-compatibility">Dyn Compatibility</a></h3><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In syn::<wbr>token</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">syn</a>::<wbr><a href="index.html">token</a></div><h1>Trait <span class="trait">Token</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/syn/token.rs.html#125-133">Source</a> </span></div><pre class="rust item-decl"><code>pub trait Token: Sealed { }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Marker trait for types that represent single tokens.</p>
<p>This trait is sealed and cannot be implemented for types outside of Syn.</p>
</div></details><h2 id="dyn-compatibility" class="section-header">Dyn Compatibility<a href="#dyn-compatibility" class="anchor">§</a></h2><div class="dyn-compatibility-info"><p>This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.89.0/reference/items/traits.html#dyn-compatibility">dyn compatible</a>.</p><p><i>In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.</i></p></div><h2 id="foreign-impls" class="section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor">§</a></h2><section id="impl-Token-for-TokenTree" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#183">Source</a><a href="#impl-Token-for-TokenTree" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="enum" href="../../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></h3></section><section id="impl-Token-for-Group" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#184">Source</a><a href="#impl-Token-for-Group" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a></h3></section><section id="impl-Token-for-Literal" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#182">Source</a><a href="#impl-Token-for-Literal" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../../proc_macro2/struct.Literal.html" title="struct proc_macro2::Literal">Literal</a></h3></section><section id="impl-Token-for-Punct" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#181">Source</a><a href="#impl-Token-for-Punct" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../../proc_macro2/struct.Punct.html" title="struct proc_macro2::Punct">Punct</a></h3></section><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-Token-for-Lit" class="impl"><a class="src rightside" href="../../src/syn/lit.rs.html#1050">Source</a><a href="#impl-Token-for-Lit" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="enum" href="../enum.Lit.html" title="enum syn::Lit">Lit</a></h3></section><section id="impl-Token-for-Ident" class="impl"><a class="src rightside" href="../../src/syn/ident.rs.html#95-107">Source</a><a href="#impl-Token-for-Ident" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../struct.Ident.html" title="struct syn::Ident">Ident</a></h3></section><section id="impl-Token-for-Lifetime" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#185">Source</a><a href="#impl-Token-for-Lifetime" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../struct.Lifetime.html" title="struct syn::Lifetime">Lifetime</a></h3></section><section id="impl-Token-for-LitBool" class="impl"><a class="src rightside" href="../../src/syn/lit.rs.html#1058">Source</a><a href="#impl-Token-for-LitBool" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../struct.LitBool.html" title="struct syn::LitBool">LitBool</a></h3></section><section id="impl-Token-for-LitByte" class="impl"><a class="src rightside" href="../../src/syn/lit.rs.html#1054">Source</a><a href="#impl-Token-for-LitByte" class="ancho
deploy: `b56668540e` 2025-08-20 14:48:48 +00:00			<!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="Marker trait for types that represent single tokens."><title>Token in syn::token - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-84e720fa.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="syn" data-themes="" data-resource-suffix="" data-rustdoc-version="1.89.0 (29483883e 2025-08-04)" data-channel="1.89.0" data-search-js="search-92309212.js" data-settings-js="settings-5514c975.js" ><script src="../../static.files/storage-4e99c027.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-fd3af306.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-32bb7600.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../syn/index.html">syn</a><span class="version">2.0.106</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Token</a></h2><h3><a href="#foreign-impls">Implementations on Foreign Types</a></h3><ul class="block"><li><a href="#impl-Token-for-Group" title="Group">Group</a></li><li><a href="#impl-Token-for-Literal" title="Literal">Literal</a></li><li><a href="#impl-Token-for-Punct" title="Punct">Punct</a></li><li><a href="#impl-Token-for-TokenTree" title="TokenTree">TokenTree</a></li></ul><h3><a href="#dyn-compatibility">Dyn Compatibility</a></h3><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In syn::<wbr>token</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">syn</a>::<wbr><a href="index.html">token</a></div><h1>Trait <span class="trait">Token</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/syn/token.rs.html#125-133">Source</a> </span></div><pre class="rust item-decl"><code>pub trait Token: Sealed { }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Marker trait for types that represent single tokens.</p>
deploy: b78a9a7a8538778ba390506f47f985ddacf0b0c3 2021-02-19 22:15:49 +00:00			`<p>This trait is sealed and cannot be implemented for types outside of Syn.</p>`
deploy: `b56668540e` 2025-08-20 14:48:48 +00:00			</div></details><h2 id="dyn-compatibility" class="section-header">Dyn Compatibility<a href="#dyn-compatibility" class="anchor">§</a></h2><div class="dyn-compatibility-info"><p>This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.89.0/reference/items/traits.html#dyn-compatibility">dyn compatible</a>.</p><p><i>In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.</i></p></div><h2 id="foreign-impls" class="section-header">Implementations on Foreign Types<a href="#foreign-impls" class="anchor">§</a></h2><section id="impl-Token-for-TokenTree" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#183">Source</a><a href="#impl-Token-for-TokenTree" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="enum" href="../../proc_macro2/enum.TokenTree.html" title="enum proc_macro2::TokenTree">TokenTree</a></h3></section><section id="impl-Token-for-Group" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#184">Source</a><a href="#impl-Token-for-Group" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../../proc_macro2/struct.Group.html" title="struct proc_macro2::Group">Group</a></h3></section><section id="impl-Token-for-Literal" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#182">Source</a><a href="#impl-Token-for-Literal" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../../proc_macro2/struct.Literal.html" title="struct proc_macro2::Literal">Literal</a></h3></section><section id="impl-Token-for-Punct" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#181">Source</a><a href="#impl-Token-for-Punct" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../../proc_macro2/struct.Punct.html" title="struct proc_macro2::Punct">Punct</a></h3></section><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-Token-for-Lit" class="impl"><a class="src rightside" href="../../src/syn/lit.rs.html#1050">Source</a><a href="#impl-Token-for-Lit" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="enum" href="../enum.Lit.html" title="enum syn::Lit">Lit</a></h3></section><section id="impl-Token-for-Ident" class="impl"><a class="src rightside" href="../../src/syn/ident.rs.html#95-107">Source</a><a href="#impl-Token-for-Ident" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../struct.Ident.html" title="struct syn::Ident">Ident</a></h3></section><section id="impl-Token-for-Lifetime" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#185">Source</a><a href="#impl-Token-for-Lifetime" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../struct.Lifetime.html" title="struct syn::Lifetime">Lifetime</a></h3></section><section id="impl-Token-for-LitBool" class="impl"><a class="src rightside" href="../../src/syn/lit.rs.html#1058">Source</a><a href="#impl-Token-for-LitBool" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Token.html" title="trait syn::token::Token">Token</a> for <a class="struct" href="../struct.LitBool.html" title="struct syn::LitBool">LitBool</a></h3></section><section id="impl-Token-for-LitByte" class="impl"><a class="src rightside" href="../../src/syn/lit.rs.html#1054">Source</a><a href="#impl-Token-for-LitByte" class="ancho