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109 lines
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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="A macro invocation: `println!("{}", mac)`."><meta name="keywords" content="rust, rustlang, rust-lang, Macro"><title>Macro in syn - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" type="text/css" 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class="sidebar-logo" href="../syn/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../syn/index.html"><div class="logo-container"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">Macro</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#fields">Fields</a></h3><ul><li><a href="#structfield.bang_token">bang_token</a></li><li><a href="#structfield.delimiter">delimiter</a></li><li><a href="#structfield.path">path</a></li><li><a href="#structfield.tokens">tokens</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#implementations">Methods</a></h3><ul><li><a href="#method.parse_body">parse_body</a></li><li><a href="#method.parse_body_with">parse_body_with</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#trait-implementations">Trait Implementations</a></h3><ul><li><a href="#impl-Clone-for-Macro">Clone</a></li><li><a href="#impl-Parse-for-Macro">Parse</a></li><li><a href="#impl-ToTokens-for-Macro">ToTokens</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul><li><a href="#impl-RefUnwindSafe-for-Macro">RefUnwindSafe</a></li><li><a href="#impl-Send-for-Macro">!Send</a></li><li><a href="#impl-Sync-for-Macro">!Sync</a></li><li><a href="#impl-Unpin-for-Macro">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Macro">UnwindSafe</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#blanket-implementations">Blanket Implementations</a></h3><ul><li><a href="#impl-Any-for-Macro">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-Macro">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-Macro">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-Macro">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-Macro">Into<U></a></li><li><a href="#impl-Spanned-for-Macro">Spanned</a></li><li><a href="#impl-ToOwned-for-Macro">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-Macro">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-Macro">TryInto<U></a></li></ul></div></section><h2 class="location"><a href="index.html">In syn</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../syn/index.html"><img class="rust-logo" src="../rust-logo.svg" alt="logo"></a><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><button type="button">?</button></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../wheel.svg"></a></div></div></form></nav></div><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn"><span class="in-band">Struct <a href="index.html">syn</a>::<wbr><a class="struct" href="#">Macro</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../src/syn/mac.rs.html#10-22">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust struct"><code>pub struct Macro {
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pub path: <a class="struct" href="struct.Path.html" title="struct syn::Path">Path</a>,
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pub bang_token: <a class="struct" href="token/struct.Bang.html" title="struct syn::token::Bang">Bang</a>,
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pub delimiter: <a class="enum" href="enum.MacroDelimiter.html" title="enum syn::MacroDelimiter">MacroDelimiter</a>,
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pub tokens: <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a>,
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}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A macro invocation: <code>println!("{}", mac)</code>.</p>
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<p><em>This type is available only if Syn is built with the <code>"derive"</code> or <code>"full"</code>
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feature.</em></p>
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</div></details><h2 id="fields" class="fields small-section-header">Fields<a href="#fields" class="anchor"></a></h2><span id="structfield.path" class="structfield small-section-header"><a href="#structfield.path" class="anchor field"></a><code>path: <a class="struct" href="struct.Path.html" title="struct syn::Path">Path</a></code></span><span id="structfield.bang_token" class="structfield small-section-header"><a href="#structfield.bang_token" class="anchor field"></a><code>bang_token: <a class="struct" href="token/struct.Bang.html" title="struct syn::token::Bang">Bang</a></code></span><span id="structfield.delimiter" class="structfield small-section-header"><a href="#structfield.delimiter" class="anchor field"></a><code>delimiter: <a class="enum" href="enum.MacroDelimiter.html" title="enum syn::MacroDelimiter">MacroDelimiter</a></code></span><span id="structfield.tokens" class="structfield small-section-header"><a href="#structfield.tokens" class="anchor field"></a><code>tokens: <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a></code></span><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/mac.rs.html#53-150">source</a></span><a href="#impl-Macro" class="anchor"></a><h3 class="code-header in-band">impl <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.parse_body" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/mac.rs.html#138-140">source</a></span><h4 class="code-header">pub fn <a href="#method.parse_body" class="fnname">parse_body</a><T: <a class="trait" href="parse/trait.Parse.html" title="trait syn::parse::Parse">Parse</a>>(&self) -> <a class="type" href="parse/type.Result.html" title="type syn::parse::Result">Result</a><T></h4></section></summary><div class="docblock"><p>Parse the tokens within the macro invocation’s delimiters into a syntax
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tree.</p>
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<p>This is equivalent to <code>syn::parse2::<T>(mac.tokens)</code> except that it
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produces a more useful span when <code>tokens</code> is empty.</p>
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<h5 id="example"><a href="#example">Example</a></h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use</span> <span class="ident">syn</span>::{<span class="ident">parse_quote</span>, <span class="ident">Expr</span>, <span class="ident">ExprLit</span>, <span class="ident">Ident</span>, <span class="ident">Lit</span>, <span class="ident">LitStr</span>, <span class="ident">Macro</span>, <span class="ident">Token</span>};
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<span class="kw">use</span> <span class="ident">syn::ext::IdentExt</span>;
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<span class="kw">use</span> <span class="ident">syn::parse</span>::{<span class="ident">Error</span>, <span class="ident">Parse</span>, <span class="ident">ParseStream</span>, <span class="prelude-ty">Result</span>};
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<span class="kw">use</span> <span class="ident">syn::punctuated::Punctuated</span>;
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<span class="comment">// The arguments expected by libcore's format_args macro, and as a</span>
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<span class="comment">// result most other formatting and printing macros like println.</span>
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<span class="comment">//</span>
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<span class="comment">// println!("{} is {number:.prec$}", "x", prec=5, number=0.01)</span>
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<span class="kw">struct</span> <span class="ident">FormatArgs</span> {
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<span class="ident">format_string</span>: <span class="ident">Expr</span>,
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<span class="ident">positional_args</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Expr</span><span class="op">></span>,
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<span class="ident">named_args</span>: <span class="ident">Vec</span><span class="op"><</span>(<span class="ident">Ident</span>, <span class="ident">Expr</span>)<span class="op">></span>,
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}
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<span class="kw">impl</span> <span class="ident">Parse</span> <span class="kw">for</span> <span class="ident">FormatArgs</span> {
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<span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span><span class="op">></span> {
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<span class="kw">let</span> <span class="ident">format_string</span>: <span class="ident">Expr</span>;
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">positional_args</span> <span class="op">=</span> <span class="ident">Vec::new</span>();
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">named_args</span> <span class="op">=</span> <span class="ident">Vec::new</span>();
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<span class="ident">format_string</span> <span class="op">=</span> <span class="ident">input</span>.<span class="ident">parse</span>()<span class="question-mark">?</span>;
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<span class="kw">while</span> <span class="op">!</span><span class="ident">input</span>.<span class="ident">is_empty</span>() {
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<span class="ident">input</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="macro">Token!</span>[,]<span class="op">></span>()<span class="question-mark">?</span>;
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<span class="kw">if</span> <span class="ident">input</span>.<span class="ident">is_empty</span>() {
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<span class="kw">break</span>;
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}
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<span class="kw">if</span> <span class="ident">input</span>.<span class="ident">peek</span>(<span class="ident">Ident::peek_any</span>) <span class="op">&&</span> <span class="ident">input</span>.<span class="ident">peek2</span>(<span class="macro">Token!</span>[<span class="op">=</span>]) {
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<span class="kw">while</span> <span class="op">!</span><span class="ident">input</span>.<span class="ident">is_empty</span>() {
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<span class="kw">let</span> <span class="ident">name</span>: <span class="ident">Ident</span> <span class="op">=</span> <span class="ident">input</span>.<span class="ident">call</span>(<span class="ident">Ident::parse_any</span>)<span class="question-mark">?</span>;
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<span class="ident">input</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="macro">Token!</span>[<span class="op">=</span>]<span class="op">></span>()<span class="question-mark">?</span>;
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<span class="kw">let</span> <span class="ident">value</span>: <span class="ident">Expr</span> <span class="op">=</span> <span class="ident">input</span>.<span class="ident">parse</span>()<span class="question-mark">?</span>;
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<span class="ident">named_args</span>.<span class="ident">push</span>((<span class="ident">name</span>, <span class="ident">value</span>));
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<span class="kw">if</span> <span class="ident">input</span>.<span class="ident">is_empty</span>() {
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<span class="kw">break</span>;
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}
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<span class="ident">input</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="macro">Token!</span>[,]<span class="op">></span>()<span class="question-mark">?</span>;
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}
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<span class="kw">break</span>;
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}
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<span class="ident">positional_args</span>.<span class="ident">push</span>(<span class="ident">input</span>.<span class="ident">parse</span>()<span class="question-mark">?</span>);
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}
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<span class="prelude-val">Ok</span>(<span class="ident">FormatArgs</span> {
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<span class="ident">format_string</span>,
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<span class="ident">positional_args</span>,
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<span class="ident">named_args</span>,
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})
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}
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}
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<span class="comment">// Extract the first argument, the format string literal, from an</span>
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<span class="comment">// invocation of a formatting or printing macro.</span>
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<span class="kw">fn</span> <span class="ident">get_format_string</span>(<span class="ident">m</span>: <span class="kw-2">&</span><span class="ident">Macro</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">LitStr</span><span class="op">></span> {
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<span class="kw">let</span> <span class="ident">args</span>: <span class="ident">FormatArgs</span> <span class="op">=</span> <span class="ident">m</span>.<span class="ident">parse_body</span>()<span class="question-mark">?</span>;
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<span class="kw">match</span> <span class="ident">args</span>.<span class="ident">format_string</span> {
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<span class="ident">Expr::Lit</span>(<span class="ident">ExprLit</span> { <span class="ident">lit</span>: <span class="ident">Lit::Str</span>(<span class="ident">lit</span>), .. }) => <span class="prelude-val">Ok</span>(<span class="ident">lit</span>),
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<span class="ident">other</span> => {
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<span class="comment">// First argument was not a string literal expression.</span>
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<span class="comment">// Maybe something like: println!(concat!(...), ...)</span>
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<span class="prelude-val">Err</span>(<span class="ident">Error::new_spanned</span>(<span class="ident">other</span>, <span class="string">"format string must be a string literal"</span>))
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}
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}
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">invocation</span> <span class="op">=</span> <span class="macro">parse_quote!</span> {
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<span class="macro">println!</span>(<span class="string">"{:?}"</span>, <span class="ident">Instant::now</span>())
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};
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<span class="kw">let</span> <span class="ident">lit</span> <span class="op">=</span> <span class="ident">get_format_string</span>(<span class="kw-2">&</span><span class="ident">invocation</span>).<span class="ident">unwrap</span>();
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<span class="macro">assert_eq!</span>(<span class="ident">lit</span>.<span class="ident">value</span>(), <span class="string">"{:?}"</span>);
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}</code></pre></div>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.parse_body_with" class="method has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/mac.rs.html#146-149">source</a></span><h4 class="code-header">pub fn <a href="#method.parse_body_with" class="fnname">parse_body_with</a><F: <a class="trait" href="parse/trait.Parser.html" title="trait syn::parse::Parser">Parser</a>>(&self, parser: F) -> <a class="type" href="parse/type.Result.html" title="type syn::parse::Result">Result</a><F::<a class="associatedtype" href="parse/trait.Parser.html#associatedtype.Output" title="type syn::parse::Parser::Output">Output</a>></h4></section></summary><div class="docblock"><p>Parse the tokens within the macro invocation’s delimiters using the
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given parser.</p>
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</div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Clone-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/gen/clone.rs.html#1363-1372">source</a></span><a href="#impl-Clone-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/gen/clone.rs.html#1364-1371">source</a></span><a href="#method.clone" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html#tymethod.clone" class="fnname">clone</a>(&self) -> Self</h4></section></summary><div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/clone.rs.html#132-134">source</a></span><a href="#method.clone_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html#method.clone_from" class="fnname">clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&</a>Self)</h4></section></summary><div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
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</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Parse-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/mac.rs.html#178-192">source</a></span><a href="#impl-Parse-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="parse/trait.Parse.html" title="trait syn::parse::Parse">Parse</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section></summary><div class="impl-items"><section id="method.parse" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/mac.rs.html#179-191">source</a></span><a href="#method.parse" class="anchor"></a><h4 class="code-header">fn <a href="parse/trait.Parse.html#tymethod.parse" class="fnname">parse</a>(input: <a class="type" href="parse/type.ParseStream.html" title="type syn::parse::ParseStream">ParseStream</a><'_>) -> <a class="type" href="parse/type.Result.html" title="type syn::parse::Result">Result</a><Self></h4></section></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-ToTokens-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/mac.rs.html#202-218">source</a></span><a href="#impl-ToTokens-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="../quote/to_tokens/trait.ToTokens.html" title="trait quote::to_tokens::ToTokens">ToTokens</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_tokens" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/mac.rs.html#203-217">source</a></span><a href="#method.to_tokens" class="anchor"></a><h4 class="code-header">fn <a href="../quote/to_tokens/trait.ToTokens.html#tymethod.to_tokens" class="fnname">to_tokens</a>(&self, tokens: &mut <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a>)</h4></section></summary><div class='docblock'><p>Write <code>self</code> to the given <code>TokenStream</code>. <a href="../quote/to_tokens/trait.ToTokens.html#tymethod.to_tokens">Read more</a></p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_token_stream" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/quote/to_tokens.rs.html#59">source</a></span><a href="#method.to_token_stream" class="anchor"></a><h4 class="code-header">fn <a href="../quote/to_tokens/trait.ToTokens.html#method.to_token_stream" class="fnname">to_token_stream</a>(&self) -> <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a></h4></section></summary><div class='docblock'><p>Convert <code>self</code> directly into a <code>TokenStream</code> object. <a href="../quote/to_tokens/trait.ToTokens.html#method.to_token_stream">Read more</a></p>
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</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into_token_stream" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/quote/to_tokens.rs.html#69-71">source</a></span><a href="#method.into_token_stream" class="anchor"></a><h4 class="code-header">fn <a href="../quote/to_tokens/trait.ToTokens.html#method.into_token_stream" class="fnname">into_token_stream</a>(self) -> <a class="struct" href="../proc_macro2/struct.TokenStream.html" title="struct proc_macro2::TokenStream">TokenStream</a></h4></section></summary><div class='docblock'><p>Convert <code>self</code> directly into a <code>TokenStream</code> object. <a href="../quote/to_tokens/trait.ToTokens.html#method.into_token_stream">Read more</a></p>
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||
</div></details></div></details></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-Macro" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section><section id="impl-Send-for-Macro" class="impl has-srclink"><a href="#impl-Send-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl !<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section><section id="impl-Sync-for-Macro" class="impl has-srclink"><a href="#impl-Sync-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl !<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section><section id="impl-Unpin-for-Macro" class="impl has-srclink"><a href="#impl-Unpin-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section><section id="impl-UnwindSafe-for-Macro" class="impl has-srclink"><a href="#impl-UnwindSafe-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Macro.html" title="struct syn::Macro">Macro</a></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/any.rs.html#203">source</a></span><a href="#impl-Any-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/any.rs.html#204">source</a></span><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/1.64.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.64.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#209">source</a></span><a href="#impl-Borrow%3CT%3E-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#211">source</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&</a>T</h4></section></summary><div class='docblock'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#218">source</a></span><a href="#impl-BorrowMut%3CT%3E-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/borrow.rs.html#219">source</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&mut </a>T</h4></section></summary><div class='docblock'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/1.64.0/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#557">source</a></span><a href="#impl-From%3CT%3E-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#559">source</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#541">source</a></span><a href="#impl-Into%3CU%3E-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#549">source</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
|
||
<p>That is, this conversion is whatever the implementation of
|
||
<code><a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.From.html" title="From">From</a><T> for U</code> chooses to do.</p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Spanned-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/spanned.rs.html#110-114">source</a></span><a href="#impl-Spanned-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="spanned/trait.Spanned.html" title="trait syn::spanned::Spanned">Spanned</a> for T <span class="where fmt-newline">where<br> T: Spanned + ?<a class="trait" href="https://doc.rust-lang.org/1.64.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.span" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="../src/syn/spanned.rs.html#111-113">source</a></span><a href="#method.span" class="anchor"></a><h4 class="code-header">fn <a href="spanned/trait.Spanned.html#tymethod.span" class="fnname">span</a>(&self) -> <a class="struct" href="../proc_macro2/struct.Span.html" title="struct proc_macro2::Span">Span</a></h4></section></summary><div class='docblock'><p>Returns a <code>Span</code> covering the complete contents of this syntax tree
|
||
node, or <a href="../proc_macro2/struct.Span.html#method.call_site"><code>Span::call_site()</code></a> if this node is empty. <a href="spanned/trait.Spanned.html#tymethod.span">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-ToOwned-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/alloc/borrow.rs.html#83">source</a></span><a href="#impl-ToOwned-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T> <a class="trait" href="https://doc.rust-lang.org/1.64.0/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T <span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Owned" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.64.0/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'><p>The resulting type after obtaining ownership.</p>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/alloc/borrow.rs.html#88">source</a></span><a href="#method.to_owned" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fnname">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'><p>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/1.64.0/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></p>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/alloc/borrow.rs.html#92">source</a></span><a href="#method.clone_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fnname">clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/1.64.0/std/primitive.reference.html">&mut </a>T)</h4></section></summary><div class='docblock'><p>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/1.64.0/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#598">source</a></span><a href="#impl-TryFrom%3CU%3E-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#604">source</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
|
||
</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-Macro" class="impl has-srclink"><span class="rightside"><a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#583">source</a></span><a href="#impl-TryInto%3CU%3E-for-Macro" class="anchor"></a><h3 class="code-header in-band">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'><p>The type returned in the event of a conversion error.</p>
|
||
</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/1.64.0/src/core/convert/mod.rs.html#589">source</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/1.64.0/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/1.64.0/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'><p>Performs the conversion.</p>
|
||
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