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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="Parser that can parse Rust tokens into a particular syntax tree node."><title>Parser in syn::parse - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-ac92e1bbe349e143.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="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><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 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">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../syn/index.html">syn</a><span class="version">2.0.51</span></h2></div><h2 class="location"><a href="#">Parser</a></h2><div class="sidebar-elems"><section><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.Output">Output</a></li></ul><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.parse2">parse2</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.parse">parse</a></li><li><a href="#method.parse_str">parse_str</a></li></ul><h3><a href="#object-safety">Object Safety</a></h3><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In syn::parse</a></h2></div></nav><div class="sidebar-resizer"></div>
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../syn/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Trait <a href="../index.html">syn</a>::<wbr><a href="index.html">parse</a>::<wbr><a class="trait" href="#">Parser</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/syn/parse.rs.html#1235-1273">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub trait Parser: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> {
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type <a href="#associatedtype.Output" class="associatedtype">Output</a>;
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// Required method
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fn <a href="#tymethod.parse2" class="fn">parse2</a>(self, tokens: <a class="struct" href="../../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a>) -> <a class="type" href="type.Result.html" title="type syn::parse::Result">Result</a><Self::<a class="associatedtype" href="trait.Parser.html#associatedtype.Output" title="type syn::parse::Parser::Output">Output</a>>;
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// Provided methods
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fn <a href="#method.parse" class="fn">parse</a>(self, tokens: <a class="struct" href="https://doc.rust-lang.org/1.76.0/proc_macro/struct.TokenStream.html" title="struct proc_macro::TokenStream">TokenStream</a>) -> <a class="type" href="type.Result.html" title="type syn::parse::Result">Result</a><Self::<a class="associatedtype" href="trait.Parser.html#associatedtype.Output" title="type syn::parse::Parser::Output">Output</a>> { ... }
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<span class="item-spacer"></span> fn <a href="#method.parse_str" class="fn">parse_str</a>(self, s: &<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.str.html">str</a>) -> <a class="type" href="type.Result.html" title="type syn::parse::Result">Result</a><Self::<a class="associatedtype" href="trait.Parser.html#associatedtype.Output" title="type syn::parse::Parser::Output">Output</a>> { ... }
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}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Parser that can parse Rust tokens into a particular syntax tree node.</p>
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<p>Refer to the <a href="index.html" title="mod syn::parse">module documentation</a> for details about parsing in Syn.</p>
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</div></details><h2 id="required-associated-types" class="section-header">Required Associated Types<a href="#required-associated-types" class="anchor">§</a></h2><div class="methods"><section id="associatedtype.Output" class="method"><a class="src rightside" href="../../src/syn/parse.rs.html#1236">source</a><h4 class="code-header">type <a href="#associatedtype.Output" class="associatedtype">Output</a></h4></section></div><h2 id="required-methods" class="section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="tymethod.parse2" class="method"><a class="src rightside" href="../../src/syn/parse.rs.html#1242">source</a><h4 class="code-header">fn <a href="#tymethod.parse2" class="fn">parse2</a>(self, tokens: <a class="struct" href="../../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a>) -> <a class="type" href="type.Result.html" title="type syn::parse::Result">Result</a><Self::<a class="associatedtype" href="trait.Parser.html#associatedtype.Output" title="type syn::parse::Parser::Output">Output</a>></h4></section></summary><div class="docblock"><p>Parse a proc-macro2 token stream into the chosen syntax tree node.</p>
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<p>This function will check that the input is fully parsed. If there are
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any unparsed tokens at the end of the stream, an error is returned.</p>
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</div></details></div><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.parse" class="method"><a class="src rightside" href="../../src/syn/parse.rs.html#1250-1252">source</a><h4 class="code-header">fn <a href="#method.parse" class="fn">parse</a>(self, tokens: <a class="struct" href="https://doc.rust-lang.org/1.76.0/proc_macro/struct.TokenStream.html" title="struct proc_macro::TokenStream">TokenStream</a>) -> <a class="type" href="type.Result.html" title="type syn::parse::Result">Result</a><Self::<a class="associatedtype" href="trait.Parser.html#associatedtype.Output" title="type syn::parse::Parser::Output">Output</a>></h4></section></summary><div class="docblock"><p>Parse tokens of source code into the chosen syntax tree node.</p>
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<p>This function will check that the input is fully parsed. If there are
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any unparsed tokens at the end of the stream, an error is returned.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.parse_str" class="method"><a class="src rightside" href="../../src/syn/parse.rs.html#1263-1265">source</a><h4 class="code-header">fn <a href="#method.parse_str" class="fn">parse_str</a>(self, s: &<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.str.html">str</a>) -> <a class="type" href="type.Result.html" title="type syn::parse::Result">Result</a><Self::<a class="associatedtype" href="trait.Parser.html#associatedtype.Output" title="type syn::parse::Parser::Output">Output</a>></h4></section></summary><div class="docblock"><p>Parse a string of Rust code into the chosen syntax tree node.</p>
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<p>This function will check that the input is fully parsed. If there are
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any unparsed tokens at the end of the string, an error is returned.</p>
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<h5 id="hygiene"><a href="#hygiene">Hygiene</a></h5>
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<p>Every span in the resulting syntax tree will be set to resolve at the
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macro call site.</p>
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</div></details></div><h2 id="object-safety" class="section-header">Object Safety<a href="#object-safety" class="anchor">§</a></h2><div class="object-safety-info">This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.76.0/reference/items/traits.html#object-safety">object safe</a>.</div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><details class="toggle implementors-toggle"><summary><section id="impl-Parser-for-F" class="impl"><a class="src rightside" href="../../src/syn/parse.rs.html#1282-1313">source</a><a href="#impl-Parser-for-F" class="anchor">§</a><h3 class="code-header">impl<F, T> <a class="trait" href="trait.Parser.html" title="trait syn::parse::Parser">Parser</a> for F<div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="type" href="type.ParseStream.html" title="type syn::parse::ParseStream">ParseStream</a><'_>) -> <a class="type" href="type.Result.html" title="type syn::parse::Result">Result</a><T>,</div></h3></section></summary><div class="impl-items"><section id="associatedtype.Output-1" class="associatedtype trait-impl"><a href="#associatedtype.Output-1" class="anchor">§</a><h4 class="code-header">type <a href="#associatedtype.Output" class="associatedtype">Output</a> = T</h4></section></div></details></div><script src="../../trait.impl/syn/parse/trait.Parser.js" async></script></section></div></main></body></html> |