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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="Pseudo-token used for peeking the end of a parse stream."><title>End in syn::parse - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.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-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-b0742ba02757f159.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="1.83.0 (90b35a623 2024-11-26)" data-channel="1.83.0" data-search-js="search-f0d225181b97f9a4.js" data-settings-js="settings-805db61a62df4bd2.js" ><script src="../../static.files/storage-1d39b6787ed640ff.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-f070b9041d14864c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-0111fcff984fae8f.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc struct"><!--[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">2.0.90</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">End</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#example" title="Example">Example</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Clone-for-End" title="Clone">Clone</a></li><li><a href="#impl-Copy-for-End" title="Copy">Copy</a></li><li><a href="#impl-Peek-for-End" title="Peek">Peek</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Freeze-for-End" title="Freeze">Freeze</a></li><li><a href="#impl-RefUnwindSafe-for-End" title="RefUnwindSafe">RefUnwindSafe</a></li><li><a href="#impl-Send-for-End" title="Send">Send</a></li><li><a href="#impl-Sync-for-End" title="Sync">Sync</a></li><li><a href="#impl-Unpin-for-End" title="Unpin">Unpin</a></li><li><a href="#impl-UnwindSafe-for-End" title="UnwindSafe">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T" title="Any">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T" title="Borrow<T>">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T" title="BorrowMut<T>">BorrowMut<T></a></li><li><a href="#impl-CloneToUninit-for-T" title="CloneToUninit">CloneToUninit</a></li><li><a href="#impl-From%3CT%3E-for-T" title="From<T>">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-T" title="Into<U>">Into<U></a></li><li><a href="#impl-ToOwned-for-T" title="ToOwned">ToOwned</a></li><li><a href="#impl-Token-for-T" title="Token">Token</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T" title="TryFrom<U>">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-T" title="TryInto<U>">TryInto<U></a></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In syn::<wbr>parse</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="../index.html">syn</a>::<wbr><a href="index.html">parse</a></span><h1>Struct <span class="struct">End</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/lookahead.rs.html#294">source</a> </span></div><pre class="rust item-decl"><code>pub struct End;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Pseudo-token used for peeking the end of a parse stream.</p>
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<p>This type is only useful as an argument to one of the following functions:</p>
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<ul>
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<li><a href="struct.ParseBuffer.html#method.peek" title="method syn::parse::ParseBuffer::peek"><code>ParseStream::peek</code></a></li>
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<li><a href="struct.ParseBuffer.html#method.peek2" title="method syn::parse::ParseBuffer::peek2"><code>ParseStream::peek2</code></a></li>
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<li><a href="struct.ParseBuffer.html#method.peek3" title="method syn::parse::ParseBuffer::peek3"><code>ParseStream::peek3</code></a></li>
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<li><a href="struct.Lookahead1.html#method.peek" title="method syn::parse::Lookahead1::peek"><code>Lookahead1::peek</code></a></li>
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</ul>
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<p>The peek will return <code>true</code> if there are no remaining tokens after that
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point in the parse stream.</p>
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<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
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<p>Suppose we are parsing attributes containing core::fmt inspired formatting
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arguments:</p>
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<ul>
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<li><code>#[fmt("simple example")]</code></li>
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<li><code>#[fmt("interpolation e{}ample", self.x)]</code></li>
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<li><code>#[fmt("interpolation e{x}ample")]</code></li>
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</ul>
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<p>and we want to recognize the cases where no interpolation occurs so that
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more efficient code can be generated.</p>
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<p>The following implementation uses <code>input.peek(Token![,]) && input.peek2(End)</code> to recognize the case of a trailing comma without
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consuming the comma from the parse stream, because if it isn’t a trailing
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comma, that same comma needs to be parsed as part of <code>args</code>.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>proc_macro2::TokenStream;
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<span class="kw">use </span>quote::quote;
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<span class="kw">use </span>syn::parse::{End, Parse, ParseStream, <span class="prelude-ty">Result</span>};
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<span class="kw">use </span>syn::{parse_quote, Attribute, LitStr, Token};
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<span class="kw">struct </span>FormatArgs {
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template: LitStr, <span class="comment">// "...{}..."
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</span>args: TokenStream, <span class="comment">// , self.x
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</span>}
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<span class="kw">impl </span>Parse <span class="kw">for </span>FormatArgs {
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<span class="kw">fn </span>parse(input: ParseStream) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> {
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<span class="kw">let </span>template: LitStr = input.parse()<span class="question-mark">?</span>;
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<span class="kw">let </span>args = <span class="kw">if </span>input.is_empty()
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|| input.peek(<span class="macro">Token!</span>[,]) && input.peek2(End)
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{
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input.parse::<<span class="prelude-ty">Option</span><<span class="macro">Token!</span>[,]>>()<span class="question-mark">?</span>;
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TokenStream::new()
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} <span class="kw">else </span>{
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input.parse()<span class="question-mark">?
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</span>};
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<span class="prelude-val">Ok</span>(FormatArgs {
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template,
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args,
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})
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}
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}
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<span class="kw">fn </span>main() -> <span class="prelude-ty">Result</span><()> {
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<span class="kw">let </span>attrs: Vec<Attribute> = <span class="macro">parse_quote!</span> {
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<span class="attr">#[fmt(<span class="string">"simple example"</span>)]
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#[fmt(<span class="string">"interpolation e{}ample"</span>, <span class="self">self</span>.x)]
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#[fmt(<span class="string">"interpolation e{x}ample"</span>)]
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</span>};
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<span class="kw">for </span>attr <span class="kw">in </span><span class="kw-2">&</span>attrs {
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<span class="kw">let </span>FormatArgs { template, args } = attr.parse_args()<span class="question-mark">?</span>;
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<span class="kw">let </span>requires_fmt_machinery =
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!args.is_empty() || template.value().contains([<span class="string">'{'</span>, <span class="string">'}'</span>]);
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<span class="kw">let </span>out = <span class="kw">if </span>requires_fmt_machinery {
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<span class="macro">quote!</span> {
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<span class="macro">::core::write!</span>(__formatter, #template #args)
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}
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} <span class="kw">else </span>{
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<span class="macro">quote!</span> {
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__formatter.write_str(#template)
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}
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};
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<span class="macro">println!</span>(<span class="string">"{}"</span>, out);
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}
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<span class="prelude-val">Ok</span>(())
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}</code></pre></div>
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<p>Implementing this parsing logic without <code>peek2(End)</code> is more clumsy because
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we’d need a parse stream actually advanced past the comma before being able
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to find out whether there is anything after it. It would look something
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like:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>syn::parse::discouraged::Speculative <span class="kw">as _</span>;
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<span class="kw">let </span>ahead = input.fork();
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ahead.parse::<<span class="prelude-ty">Option</span><<span class="macro">Token!</span>[,]>>()<span class="question-mark">?</span>;
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<span class="kw">let </span>args = <span class="kw">if </span>ahead.is_empty() {
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input.advance_to(<span class="kw-2">&</span>ahead);
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TokenStream::new()
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} <span class="kw">else </span>{
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input.parse()<span class="question-mark">?
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</span>};</code></pre></div>
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<p>or:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>quote::ToTokens <span class="kw">as _</span>;
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<span class="kw">let </span>comma: <span class="prelude-ty">Option</span><<span class="macro">Token!</span>[,]> = input.parse()<span class="question-mark">?</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>args = TokenStream::new();
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<span class="kw">if </span>!input.is_empty() {
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comma.to_tokens(<span class="kw-2">&mut </span>args);
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input.parse::<TokenStream>()<span class="question-mark">?</span>.to_tokens(<span class="kw-2">&mut </span>args);
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}</code></pre></div>
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</div></details><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Clone-for-End" class="impl"><a class="src rightside" href="../../src/syn/lookahead.rs.html#298-302">source</a><a href="#impl-Clone-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="../../src/syn/lookahead.rs.html#299-301">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&self) -> Self</h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/1.83.0/src/core/clone.rs.html#174">source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&mut self, source: &Self)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><section id="impl-Copy-for-End" class="impl"><a class="src rightside" href="../../src/syn/lookahead.rs.html#296">source</a><a href="#impl-Copy-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section><section id="impl-Peek-for-End" class="impl"><a class="src rightside" href="../../src/syn/lookahead.rs.html#304-306">source</a><a href="#impl-Peek-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.Peek.html" title="trait syn::parse::Peek">Peek</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-Freeze-for-End" class="impl"><a href="#impl-Freeze-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section><section id="impl-RefUnwindSafe-for-End" class="impl"><a href="#impl-RefUnwindSafe-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section><section id="impl-Send-for-End" class="impl"><a href="#impl-Send-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section><section id="impl-Sync-for-End" class="impl"><a href="#impl-Sync-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section><section id="impl-Unpin-for-End" class="impl"><a href="#impl-Unpin-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section><section id="impl-UnwindSafe-for-End" class="impl"><a href="#impl-UnwindSafe-for-End" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.End.html" title="struct syn::parse::End">End</a></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/any.rs.html#138">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
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T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/any.rs.html#139">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.83.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.83.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#209">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#211">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#217">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/1.83.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/borrow.rs.html#218">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.83.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-CloneToUninit-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/clone.rs.html#273">source</a><a href="#impl-CloneToUninit-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.CloneToUninit.html" title="trait core::clone::CloneToUninit">CloneToUninit</a> for T<div class="where">where
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T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone_to_uninit" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/clone.rs.html#275">source</a><a href="#method.clone_to_uninit" class="anchor">§</a><h4 class="code-header">unsafe fn <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit" class="fn">clone_to_uninit</a>(&self, dst: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/std/primitive.pointer.html">*mut T</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>clone_to_uninit</code>)</span></div></span><div class='docblock'>Performs copy-assignment from <code>self</code> to <code>dst</code>. <a href="https://doc.rust-lang.org/1.83.0/core/clone/trait.CloneToUninit.html#tymethod.clone_to_uninit">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#765">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#768">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#748-750">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#758">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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<p>That is, this conversion is whatever the implementation of
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<code><a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/alloc/borrow.rs.html#82-84">source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.83.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<div class="where">where
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T: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/alloc/borrow.rs.html#86">source</a><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/alloc/borrow.rs.html#87">source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.83.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/alloc/borrow.rs.html#91">source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/1.83.0/std/primitive.reference.html">&mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.83.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Token-for-T" class="impl"><a class="src rightside" href="../../src/syn/token.rs.html#191-199">source</a><a href="#impl-Token-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="../token/trait.Token.html" title="trait syn::token::Token">Token</a> for T<div class="where">where
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T: CustomToken,</div></h3></section></summary><div class="impl-items"><section id="method.peek" class="method trait-impl"><a class="src rightside" href="../../src/syn/token.rs.html#192-194">source</a><a href="#method.peek" class="anchor">§</a><h4 class="code-header">fn <a href="../token/trait.Token.html#tymethod.peek" class="fn">peek</a>(cursor: <a class="struct" href="../buffer/struct.Cursor.html" title="struct syn::buffer::Cursor">Cursor</a><'_>) -> <a class="primitive" href="https://doc.rust-lang.org/1.83.0/std/primitive.bool.html">bool</a></h4></section><section id="method.display" class="method trait-impl"><a class="src rightside" href="../../src/syn/token.rs.html#196-198">source</a><a href="#method.display" class="anchor">§</a><h4 class="code-header">fn <a href="../token/trait.Token.html#tymethod.display" class="fn">display</a>() -> &'static <a class="primitive" href="https://doc.rust-lang.org/1.83.0/std/primitive.str.html">str</a></h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#805-807">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#809">source</a><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#812">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#790-792">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#794">source</a><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.83.0/src/core/convert/mod.rs.html#797">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.83.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.83.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html> |