<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="A Rust expression."><title>Expr in syn - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><linkrel="stylesheet"href="../static.files/normalize-76eba96aa4d2e634.css"><linkrel="stylesheet"href="../static.files/rustdoc-5bc39a1768837dd0.css"><metaname="rustdoc-vars"data-root-path="../"data-static-root-path="../static.files/"data-current-crate="syn"data-themes=""data-resource-suffix=""data-rustdoc-version="1.77.2 (25ef9e3d8 2024-04-09)"data-channel="1.77.2"data-search-js="search-dd67cee4cfa65049.js"data-settings-js="settings-4313503d2e1961c2.js"><scriptsrc="../static.files/storage-4c98445ec4002617.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../static.files/main-48f368f3872407c8.js"></script><noscript><linkrel="stylesheet"href="../static.files/noscript-04d5337699b92874.css"></noscript><linkrel="alternate icon"type="image/png"href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><linkrel="alternate icon"type="image/png"href="../static.files/favicon-32x32-422f7d1d52889060.png"><linkrel="icon"type="image/svg+xml"href="../static.files/favicon-2c020d218678b618.svg"></head><bodyclass="rustdoc enum"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle"title="show sidebar"></button></nav><navclass="sidebar"><divclass="sidebar-crate"><h2><ahref="../syn/index.html">syn</a><spanclass="version">2.0.58</span></h2></div><h2class="location"><ahref="#">Expr</a></h2><divclass="sidebar-elems"><section><h3><ahref="#variants">Variants</a></h3><ulclass="block variant"><li><ahref="#variant.Array">Array</a></li><li><ahref="#variant.Assign">Assign</a></li><li><ahref="#variant.Async">Async</a></li><li><ahref="#variant.Await">Await</a></li><li><ahref="#variant.Binary">Binary</a></li><li><ahref="#variant.Block">Block</a></li><li><ahref="#variant.Break">Break</a></li><li><ahref="#variant.Call">Call</a></li><li><ahref="#variant.Cast">Cast</a></li><li><ahref="#variant.Closure">Closure</a></li><li><ahref="#variant.Const">Const</a></li><li><ahref="#variant.Continue">Continue</a></li><li><ahref="#variant.Field">Field</a></li><li><ahref="#variant.ForLoop">ForLoop</a></li><li><ahref="#variant.Group">Group</a></li><li><ahref="#variant.If">If</a></li><li><ahref="#variant.Index">Index</a></li><li><ahref="#variant.Infer">Infer</a></li><li><ahref="#variant.Let">Let</a></li><li><ahref="#variant.Lit">Lit</a></li><li><ahref="#variant.Loop">Loop</a></li><li><ahref="#variant.Macro">Macro</a></li><li><ahref="#variant.Match">Match</a></li><li><ahref="#variant.MethodCall">MethodCall</a></li><li><ahref="#variant.Paren">Paren</a></li><li><ahref="#variant.Path">Path</a></li><li><ahref="#variant.Range">Range</a></li><li><ahref="#variant.Reference">Reference</a></li><li><ahref="#variant.Repeat">Repeat</a></li><li><ahref="#variant.Return">Return</a></li><li><ahref="#variant.Struct">Struct</a></li><li><ahref="#variant.Try">Try</a></li><li><ahref="#variant.TryBlock">TryBlock</a></li><li><ahref="#variant.Tuple">Tuple</a></li><li><ahref="#variant.Unary">Unary</a></li><li><ahref="#variant.Unsafe">Unsafe</a></li><li><ahref="#variant.Verbatim">
<main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><span></span><divid="sidebar-button"tabindex="-1"><ahref="../syn/all.html"title="show sidebar"></a></div><inputclass="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"><divid="help-button"tabindex="-1"><ahref="../help.html"title="help">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1>Enum <ahref="index.html">syn</a>::<wbr><aclass="enum"href="#">Expr</a><buttonid="copy-path"title="Copy item path to clipboard"><imgsrc="../static.files/clipboard-7571035ce49a181d.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="src"href="../src/syn/expr.rs.html#29-258">source</a> · <buttonid="toggle-all-docs"title="collapse all docs">[<span>−</span>]</button></span></div><preclass="rust item-decl"><code><divclass="code-attribute">#[non_exhaustive]</div>pub enum Expr {
<p>In general, the name to which a syntax tree enum variant is bound should
be a suitable name for the complete syntax tree enum type.</p>
<divclass="example-wrap"><preclass="rust rust-example-rendered"><code><spanclass="comment">// Binding is called `base` which is the name I would use if I were
// assigning `*discriminant.base` without an `if let`.
</span><spanclass="kw">if let </span>Expr::Tuple(base) = <spanclass="kw-2">*</span>discriminant.base {</code></pre></div>
<p>A sign that you may not be choosing the right variable names is if you
see names getting repeated in your code, like accessing
<code>receiver.receiver</code> or <code>pat.pat</code> or <code>cond.cond</code>.</p>
</div></details><h2id="variants"class="variants section-header">Variants (Non-exhaustive)<ahref="#variants"class="anchor">§</a></h2><detailsclass="toggle non-exhaustive"><summaryclass="hideme"><span>This enum is marked as non-exhaustive</span></summary><divclass="docblock">Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.</div></details><divclass="variants"><sectionid="variant.Array"class="variant"><ahref="#variant.Array"class="anchor">§</a><h3class="code-header">Array(<aclass="struct"href="struct.ExprArray.html"title="struct syn::ExprArray">ExprArray</a>)</h3></section><divclass="docblock"><p>A slice literal expression: <code>[a, b, c, d]</code>.</p>
</div><sectionid="variant.Break"class="variant"><ahref="#variant.Break"class="anchor">§</a><h3class="code-header">Break(<aclass="struct"href="struct.ExprBreak.html"title="struct syn::ExprBreak">ExprBreak</a>)</h3></section><divclass="docblock"><p>A <code>break</code>, with an optional label to break and an optional
expression.</p>
</div><sectionid="variant.Call"class="variant"><ahref="#variant.Call"class="anchor">§</a><h3class="code-header">Call(<aclass="struct"href="struct.ExprCall.html"title="struct syn::ExprCall">ExprCall</a>)</h3></section><divclass="docblock"><p>A function call expression: <code>invoke(a, b)</code>.</p>
</div><sectionid="variant.Cast"class="variant"><ahref="#variant.Cast"class="anchor">§</a><h3class="code-header">Cast(<aclass="struct"href="struct.ExprCast.html"title="struct syn::ExprCast">ExprCast</a>)</h3></section><divclass="docblock"><p>A cast expression: <code>foo as f64</code>.</p>
</div><sectionid="variant.Closure"class="variant"><ahref="#variant.Closure"class="anchor">§</a><h3class="code-header">Closure(<aclass="struct"href="struct.ExprClosure.html"title="struct syn::ExprClosure">ExprClosure</a>)</h3></section><divclass="docblock"><p>A closure expression: <code>|a, b| a + b</code>.</p>
</div><sectionid="variant.Continue"class="variant"><ahref="#variant.Continue"class="anchor">§</a><h3class="code-header">Continue(<aclass="struct"href="struct.ExprContinue.html"title="struct syn::ExprContinue">ExprContinue</a>)</h3></section><divclass="docblock"><p>A <code>continue</code>, with an optional label.</p>
</div><sectionid="variant.Field"class="variant"><ahref="#variant.Field"class="anchor">§</a><h3class="code-header">Field(<aclass="struct"href="struct.ExprField.html"title="struct syn::ExprField">ExprField</a>)</h3></section><divclass="docblock"><p>Access of a named struct field (<code>obj.k</code>) or unnamed tuple struct
field (<code>obj.0</code>).</p>
</div><sectionid="variant.ForLoop"class="variant"><ahref="#variant.ForLoop"class="anchor">§</a><h3class="code-header">ForLoop(<aclass="struct"href="struct.ExprForLoop.html"title="struct syn::ExprForLoop">ExprForLoop</a>)</h3></section><divclass="docblock"><p>A for loop: <code>for pat in expr { ... }</code>.</p>
</div><sectionid="variant.Group"class="variant"><ahref="#variant.Group"class="anchor">§</a><h3class="code-header">Group(<aclass="struct"href="struct.ExprGroup.html"title="struct syn::ExprGroup">ExprGroup</a>)</h3></section><divclass="docblock"><p>An expression contained within invisible delimiters.</p>
<p>This variant is important for faithfully representing the precedence
of expressions and is related to <code>None</code>-delimited spans in a
<code>TokenStream</code>.</p>
</div><sectionid="variant.If"class="variant"><ahref="#variant.If"class="anchor">§</a><h3class="code-header">If(<aclass="struct"href="struct.ExprIf.html"title="struct syn::ExprIf">ExprIf</a>)</h3></section><divclass="docblock"><p>An <code>if</code> expression with an optional <code>else</code> block: <code>if expr { ... } else { ... }</code>.</p>
<p>The <code>else</code> branch expression may only be an <code>If</code> or <code>Block</code>
expression, not any of the other types of expression.</p>
</div><sectionid="variant.Infer"class="variant"><ahref="#variant.Infer"class="anchor">§</a><h3class="code-header">Infer(<aclass="struct"href="struct.ExprInfer.html"title="struct syn::ExprInfer">ExprInfer</a>)</h3></section><divclass="docblock"><p>The inferred value of a const generic argument, denoted <code>_</code>.</p>
</div><sectionid="variant.Lit"class="variant"><ahref="#variant.Lit"class="anchor">§</a><h3class="code-header">Lit(<aclass="struct"href="struct.ExprLit.html"title="struct syn::ExprLit">ExprLit</a>)</h3></section><divclass="docblock"><p>A literal in place of an expression: <code>1</code>, <code>"foo"</code>.</p>
</div><sectionid="variant.Path"class="variant"><ahref="#variant.Path"class="anchor">§</a><h3class="code-header">Path(<aclass="struct"href="struct.ExprPath.html"title="struct syn::ExprPath">ExprPath</a>)</h3></section><divclass="docblock"><p>A path like <code>std::mem::replace</code> possibly containing generic
parameters and a qualified self-type.</p>
<p>A plain identifier like <code>x</code> is a path of length 1.</p>
</div><sectionid="variant.Range"class="variant"><ahref="#variant.Range"class="anchor">§</a><h3class="code-header">Range(<aclass="struct"href="struct.ExprRange.html"title="struct syn::ExprRange">ExprRange</a>)</h3></section><divclass="docblock"><p>A range expression: <code>1..2</code>, <code>1..</code>, <code>..2</code>, <code>1..=2</code>, <code>..=2</code>.</p>
</div><sectionid="variant.Reference"class="variant"><ahref="#variant.Reference"class="anchor">§</a><h3class="code-header">Reference(<aclass="struct"href="struct.ExprReference.html"title="struct syn::ExprReference">ExprReference</a>)</h3></section><divclass="docblock"><p>A referencing operation: <code>&a</code> or <code>&mut a</code>.</p>
</div><sectionid="variant.Repeat"class="variant"><ahref="#variant.Repeat"class="anchor">§</a><h3class="code-header">Repeat(<aclass="struct"href="struct.ExprRepeat.html"title="struct syn::ExprRepeat">ExprRepeat</a>)</h3></section><divclass="docblock"><p>An array literal constructed from one repeated element: <code>[0u8; N]</code>.</p>
</div><sectionid="variant.Return"class="variant"><ahref="#variant.Return"class="anchor">§</a><h3class="code-header">Return(<aclass="struct"href="struct.ExprReturn.html"title="struct syn::ExprReturn">ExprReturn</a>)</h3></section><divclass="docblock"><p>A <code>return</code>, with an optional value to be returned.</p>
</div><sectionid="variant.Verbatim"class="variant"><ahref="#variant.Verbatim"class="anchor">§</a><h3class="code-header">Verbatim(<aclass="struct"href="../proc_macro2/struct.TokenStream.html"title="struct proc_macro2::TokenStream">TokenStream</a>)</h3></section><divclass="docblock"><p>Tokens in expression position not interpreted by Syn.</p>
</div><sectionid="variant.While"class="variant"><ahref="#variant.While"class="anchor">§</a><h3class="code-header">While(<aclass="struct"href="struct.ExprWhile.html"title="struct syn::ExprWhile">ExprWhile</a>)</h3></section><divclass="docblock"><p>A while loop: <code>while expr { ... }</code>.</p>
</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.parse_with_earlier_boundary_rule"class="method"><aclass="src rightside"href="../src/syn/expr.rs.html#1245-1303">source</a><h4class="code-header">pub fn <ahref="#method.parse_with_earlier_boundary_rule"class="fn">parse_with_earlier_boundary_rule</a>(input: <aclass="type"href="parse/type.ParseStream.html"title="type syn::parse::ParseStream">ParseStream</a><'_>) -><aclass="type"href="parse/type.Result.html"title="type syn::parse::Result">Result</a><<aclass="enum"href="enum.Expr.html"title="enum syn::Expr">Expr</a>></h4></section></summary><divclass="docblock"><p>An alternative to the primary <code>Expr::parse</code> parser (from the
<ahref="parse/trait.Parse.html"title="trait syn::parse::Parse"><code>Parse</code></a> trait) for syntactic positions in which expression
boundaries are placed more eagerly than done by the typical
expression grammar. This includes expressions at the head of a
statement or in the right-hand side of a <code>match</code> arm.</p>
<spanclass="kw">if </span>cond { f } <spanclass="kw">else </span>{ g }
()
};</code></pre></div>
</li>
<li>
<divclass="example-wrap"><preclass="rust rust-example-rendered"><code><spanclass="kw">let _ </span>= [<spanclass="kw">if </span>cond { f } <spanclass="kw">else </span>{ g } ()];</code></pre></div>
</li>
</ol>
<p>The same sequence of tokens <code>if cond { f } else { g } ()</code> appears in
expression position 3 times. The first two syntactic positions use
eager placement of expression boundaries, and parse as <code>Expr::If</code>,
with the adjacent <code>()</code> becoming <code>Pat::Tuple</code> or <code>Expr::Tuple</code>. In
contrast, the third case uses standard expression boundaries and
parses as <code>Expr::Call</code>.</p>
<p>As with <ahref="enum.Expr.html#method.parse_without_eager_brace"title="associated function syn::Expr::parse_without_eager_brace"><code>parse_without_eager_brace</code></a>, this ambiguity in the Rust
</div></details></div></details></div><h2id="trait-implementations"class="section-header">Trait Implementations<ahref="#trait-implementations"class="anchor">§</a></h2><divid="trait-implementations-list"><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Clone-for-Expr"class="impl"><aclass="src rightside"href="../src/syn/gen/clone.rs.html#227-297">source</a><ahref="#impl-Clone-for-Expr"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a> for <aclass="enum"href="enum.Expr.html"title="enum syn::Expr">Expr</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.clone"class="method trait-impl"><aclass="src rightside"href="../src/syn/gen/clone.rs.html#228-296">source</a><ahref="#method.clone"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/clone/trait.Clone.html#tymethod.clone"class="fn">clone</a>(&self) -> Self</h4></section></summary><divclass='docblock'>Returns a copy of the value. <ahref="https://doc.rust-lang.org/1.77.2/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.clone_from"class="method trait-impl"><spanclass="rightside"><spanclass="since"title="Stable since Rust version 1.0.0">1.0.0</span> · <aclass="src"href="https://doc.rust-lang.org/1.77.2/src/core/clone.rs.html#169">source</a></span><ahref="#method.clone_from"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/clone/trait.Clone.html#method.clone_from"class="fn">clone_from</a>(&mut self, source: <aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.reference.html">&Self</a>)</h4></section></summary><divclass='docblock'>Performs copy-assignment from <code>source</code>. <ahref="https://doc.rust-lang.org/1.77.2/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Debug-for-Expr"class="impl"><aclass="src rightside"href="../src/syn/gen/debug.rs.html#397-472">source</a><ahref="#impl-Debug-for-Expr"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for <aclass="enum"href="enum.Expr.html"title="enum syn::Expr">Expr</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.fmt"class="method trait-impl"><aclass="src rightside"href="../src/syn/gen/debug.rs.html#398-471">source</a><ahref="#method.fmt"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/fmt/trait.Debug.html#tymethod.fmt"class="fn">fmt</a>(&self, formatter: &mut <aclass="struct"href="https://doc.rust-lang.org/1.77.2/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="type"href="https://doc.rust-lang.org/1.77.2/core/fmt/type.Result.html"title="type core::fmt::Result">Result</a></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/1.77.2/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-From%3CExprArray%3E-for-Expr"class="impl"><aclass="src rightside"href="../src/syn/expr.rs.html#29-258">source</a><ahref="#impl-From%3CExprArray%3E-for-Expr"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.From.html"title="trait core::convert::From">From</a><<aclass="struct"href="struct.ExprArray.html"title="struct syn::ExprArray">ExprArray</a>> for <aclass="enum"href="enu
H: <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/hash/trait.Hasher.html"title="trait core::hash::Hasher">Hasher</a>,</div></h4></section></summary><divclass='docblock'>Feeds this value into the given <ahref="https://doc.rust-lang.org/1.77.2/core/hash/trait.Hasher.html"title="trait core::hash::Hasher"><code>Hasher</code></a>. <ahref="https://doc.rust-lang.org/1.77.2/core/hash/trait.Hash.html#tymethod.hash">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.hash_slice"class="method trait-impl"><spanclass="rightside"><spanclass="since"title="Stable since Rust version 1.3.0">1.3.0</span> · <aclass="src"href="https://doc.rust-lang.org/1.77.2/src/core/hash/mod.rs.html#238-240">source</a></span><ahref="#method.hash_slice"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/hash/trait.Hash.html#method.hash_slice"class="fn">hash_slice</a><H>(data: &<aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.slice.html">[Self]</a>, state: <aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.reference.html">&mut H</a>)<divclass="where">where
Self: <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h4></section></summary><divclass='docblock'>Feeds a slice of this type into the given <ahref="https://doc.rust-lang.org/1.77.2/core/hash/trait.Hasher.html"title="trait core::hash::Hasher"><code>Hasher</code></a>. <ahref="https://doc.rust-lang.org/1.77.2/core/hash/trait.Hash.html#method.hash_slice">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-Parse-for-Expr"class="impl"><aclass="src rightside"href="../src/syn/expr.rs.html#1092-1100">source</a><ahref="#impl-Parse-for-Expr"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="parse/trait.Parse.html"title="trait syn::parse::Parse">Parse</a> for <aclass="enum"href="enum.Expr.html"title="enum syn::Expr">Expr</a></h3></section></summary><divclass="impl-items"><sectionid="method.parse"class="method trait-impl"><aclass="src rightside"href="../src/syn/expr.rs.html#1093-1099">source</a><ahref="#method.parse"class="anchor">§</a><h4class="code-header">fn <ahref="parse/trait.Parse.html#tymethod.parse"class="fn">parse</a>(input: <aclass="type"href="parse/type.ParseStream.html"title="type syn::parse::ParseStream">ParseStream</a><'_>) -><aclass="type"href="parse/type.Result.html"title="type syn::parse::Result">Result</a><Self></h4></section></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-PartialEq-for-Expr"class="impl"><aclass="src rightside"href="../src/syn/gen/eq.rs.html#246-329">source</a><ahref="#impl-PartialEq-for-Expr"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/cmp/trait.PartialEq.html"title="trait core::cmp::PartialEq">PartialEq</a> for <aclass="enum"href="enum.Expr.html"title="enum syn::Expr">Expr</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.eq"class="method trait-impl"><aclass="src rightside"href="../src/syn/gen/eq.rs.html#247-328">source</a><ahref="#method.eq"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/cmp/trait.PartialEq.html#tymethod.eq"class="fn">eq</a>(&self, other: <aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.reference.html">&Self</a>) -><aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used
by <code>==</code>.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.ne"class="method trait-impl"><spanclass="rightside"><spanclass="since"title="Stable since Rust version 1.0.0">1.0.0</span> · <aclass="src"href="https://doc.rust-lang.org/1.77.2/src/core/cmp.rs.html#242">source</a></span><ahref="#method.ne"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/cmp/trait.PartialEq.html#method.ne"class="fn">ne</a>(&self, other: <aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.reference.html">&Rhs</a>) -><aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.bool.html">bool</a></h4></section></summary><divclass='docblock'>This method tests for <code>!=</code>. The default implementation is almost always
sufficient, and should not be overridden without very good reason.</div></details></div></details><detailsclass="toggle implementors-toggle"open><summary><sectionid="impl-ToTokens-for-Expr"class="impl"><aclass="src rightside"href="../src/syn/expr.rs.html#29-258">source</a><ahref="#impl-ToTokens-for-Expr"class="anchor">§</a><h3class="code-header">impl <aclass="trait"href="../quote/to_tokens/trait.ToTokens.html"title="trait quote::to_tokens::ToTokens">ToTokens</a> for <aclass="enum"href="enum.Expr.html"title="enum syn::Expr">Expr</a></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.to_tokens"class="method trait-impl"><aclass="src rightside"href="../src/syn/expr.rs.html#29-258">source</a><ahref="#method.to_tokens"class="anchor">§</a><h4class="code-header">fn <ahref="../quote/to_tokens/trait.ToTokens.html#tymethod.to_tokens"class="fn">to_tokens</a>(&self, tokens: &mut <aclass="struct"href="../proc_macro2/struct.TokenStream.html"title="struct proc_macro2::TokenStream">TokenStream</a>)</h4></section></summary><divclass='docblock'>Write <code>self</code> to the given <code>TokenStream</code>. <ahref="../quote/to_tokens/trait.ToTokens.html#tymethod.to_tokens">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.to_token_stream"class="method trait-impl"><aclass="src rightside"href="../src/quote/to_tokens.rs.html#59">source</a><ahref="#method.to_token_stream"class="anchor">§</a><h4class="code-header">fn <ahref="../quote/to_tokens/trait.ToTokens.html#method.to_token_stream"class="fn">to_token_stream</a>(&self) -><aclass="struct"href="../proc_macro2/struct.TokenStream.html"title="struct proc_macro2::TokenStream">TokenStream</a></h4></section></summary><divclass='docblock'>Convert <code>self</code> directly into a <code>TokenStream</code> object. <ahref="../quote/to_tokens/trait.ToTokens.html#method.to_token_stream">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.into_token_stream"class="method trait-impl"><aclass="src rightside"href="../src/quote/to_tokens.rs.html#69-71">source</a><ahref="#method.into_token_stream"class="anchor">§</a><h4class="code-header">fn <ahref="../quote/to_tokens/trait.ToTokens.html#method.into_token_stream"class="fn">into_token_stream</a>(self) -><aclass="struct"href="../proc_macro2/struct.TokenStream.html"title="struct proc_macro2::TokenStream">TokenStream</a><divclass="where">where
<code><ahref="https://doc.rust-lang.org/1.77.2/core/convert/trait.From.html"title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
T: Spanned + ?<aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle method-toggle"open><summary><sectionid="method.span"class="method trait-impl"><aclass="src rightside"href="../src/syn/spanned.rs.html#105-107">source</a><ahref="#method.span"class="anchor">§</a><h4class="code-header">fn <ahref="spanned/trait.Spanned.html#tymethod.span"class="fn">span</a>(&self) -><aclass="struct"href="../proc_macro2/struct.Span.html"title="struct proc_macro2::Span">Span</a></h4></section></summary><divclass='docblock'>Returns a <code>Span</code> covering the complete contents of this syntax tree
node, or <ahref="../proc_macro2/struct.Span.html#method.call_site"title="associated function proc_macro2::Span::call_site"><code>Span::call_site()</code></a> if this node is empty.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-ToOwned-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.2/src/alloc/borrow.rs.html#83-85">source</a><ahref="#impl-ToOwned-for-T"class="anchor">§</a><h3class="code-header">impl<T><aclass="trait"href="https://doc.rust-lang.org/1.77.2/alloc/borrow/trait.ToOwned.html"title="trait alloc::borrow::ToOwned">ToOwned</a> for T<divclass="where">where
T: <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Owned"class="associatedtype trait-impl"><ahref="#associatedtype.Owned"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.77.2/alloc/borrow/trait.ToOwned.html#associatedtype.Owned"class="associatedtype">Owned</a> = T</h4></section></summary><divclass='docblock'>The resulting type after obtaining ownership.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.to_owned"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.2/src/alloc/borrow.rs.html#88">source</a><ahref="#method.to_owned"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/alloc/borrow/trait.ToOwned.html#tymethod.to_owned"class="fn">to_owned</a>(&self) -> T</h4></section></summary><divclass='docblock'>Creates owned data from borrowed data, usually by cloning. <ahref="https://doc.rust-lang.org/1.77.2/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.clone_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.2/src/alloc/borrow.rs.html#92">source</a><ahref="#method.clone_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/alloc/borrow/trait.ToOwned.html#method.clone_into"class="fn">clone_into</a>(&self, target: <aclass="primitive"href="https://doc.rust-lang.org/1.77.2/std/primitive.reference.html">&mut T</a>)</h4></section></summary><divclass='docblock'>Uses borrowed data to replace owned data, usually by cloning. <ahref="https://doc.rust-lang.org/1.77.2/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.2/src/core/convert/mod.rs.html#804-806">source</a><ahref="#impl-TryFrom%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error-1"class="associatedtype trait-impl"><ahref="#associatedtype.Error-1"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/1.77.2/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_from"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.2/src/core/convert/mod.rs.html#811">source</a><ahref="#method.try_from"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html#tymethod.try_from"class="fn">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/1.77.2/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-T"class="impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.2/src/core/convert/mod.rs.html#789-791">source</a><ahref="#impl-TryInto%3CU%3E-for-T"class="anchor">§</a><h3class="code-header">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T<divclass="where">where
U: <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><divclass="impl-items"><detailsclass="toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl"><ahref="#associatedtype.Error"class="anchor">§</a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="toggle method-toggle"open><summary><sectionid="method.try_into"class="method trait-impl"><aclass="src rightside"href="https://doc.rust-lang.org/1.77.2/src/core/convert/mod.rs.html#796">source</a><ahref="#method.try_into"class="anchor">§</a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryInto.html#tymethod.try_into"class="fn">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/1.77.2/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/1.77.2/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main></body></html>
