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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="Provides methods for converting a type `Self` into either a `Left` or `Right` variant of `Either<Self, Self>`."><title>IntoEither in either - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-ca0dd0c4.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="either" data-themes="" data-resource-suffix="" data-rustdoc-version="1.93.1 (01f6ddf75 2026-02-11) (Arch Linux rust 1:1.93.1-1)" data-channel="1.93.1" data-search-js="search-9e2438ea.js" data-stringdex-js="stringdex-a3946164.js" data-settings-js="settings-c38705f0.js" ><script src="../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-a410ff4d.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">IntoEither</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../either/index.html">either</a><span class="version">1.15.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Into<wbr>Either</a></h2><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.into_either" title="into_either">into_either</a></li><li><a href="#method.into_either_with" title="into_either_with">into_either_with</a></li></ul><h3><a href="#dyn-compatibility">Dyn Compatibility</a></h3><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate either</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="index.html">either</a></div><h1>Trait <span class="trait">Into<wbr>Either</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/either/into_either.rs.html#14-62">Source</a> </span></div><pre class="rust item-decl"><code>pub trait IntoEither: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> {
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// Provided methods
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fn <a href="#method.into_either" class="fn">into_either</a>(self, into_left: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>) -> <a class="enum" href="enum.Either.html" title="enum either::Either">Either</a><Self, Self> <a href="#" class="tooltip" data-notable-ty="Either<Self, Self>">ⓘ</a> { ... }
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<span class="item-spacer"></span> fn <a href="#method.into_either_with" class="fn">into_either_with</a><F>(self, into_left: F) -> <a class="enum" href="enum.Either.html" title="enum either::Either">Either</a><Self, Self> <a href="#" class="tooltip" data-notable-ty="Either<Self, Self>">ⓘ</a>
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<span class="where">where F: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self) -> <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a></span> { ... }
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}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Provides methods for converting a type <code>Self</code> into either a <a href="enum.Either.html#variant.Left" title="variant either::Either::Left"><code>Left</code></a> or <a href="enum.Either.html#variant.Right" title="variant either::Either::Right"><code>Right</code></a>
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variant of <a href="enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a>.</p>
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<p>The <a href="trait.IntoEither.html#method.into_either" title="method either::IntoEither::into_either"><code>into_either</code></a> method takes a <a href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html" title="primitive bool"><code>bool</code></a> to determine
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whether to convert to <a href="enum.Either.html#variant.Left" title="variant either::Either::Left"><code>Left</code></a> or <a href="enum.Either.html#variant.Right" title="variant either::Either::Right"><code>Right</code></a>.</p>
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<p>The <a href="trait.IntoEither.html#method.into_either_with" title="method either::IntoEither::into_either_with"><code>into_either_with</code></a> method takes a
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<a href="https://doc.rust-lang.org/1.93.1/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">predicate function</a> to determine whether to convert to <a href="enum.Either.html#variant.Left" title="variant either::Either::Left"><code>Left</code></a> or <a href="enum.Either.html#variant.Right" title="variant either::Either::Right"><code>Right</code></a>.</p>
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</div></details><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.into_either" class="method"><a class="src rightside" href="../src/either/into_either.rs.html#29-35">Source</a><h4 class="code-header">fn <a href="#method.into_either" class="fn">into_either</a>(self, into_left: <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>) -> <a class="enum" href="enum.Either.html" title="enum either::Either">Either</a><Self, Self> <a href="#" class="tooltip" data-notable-ty="Either<Self, Self>">ⓘ</a></h4></section></summary><div class="docblock"><p>Converts <code>self</code> into a <a href="enum.Either.html#variant.Left" title="variant either::Either::Left"><code>Left</code></a> variant of <a href="enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a>
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if <code>into_left</code> is <code>true</code>.
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Converts <code>self</code> into a <a href="enum.Either.html#variant.Right" title="variant either::Either::Right"><code>Right</code></a> variant of <a href="enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a>
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otherwise.</p>
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<h5 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>either::{IntoEither, Left, Right};
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<span class="kw">let </span>x = <span class="number">0</span>;
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<span class="macro">assert_eq!</span>(x.into_either(<span class="bool-val">true</span>), Left(x));
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<span class="macro">assert_eq!</span>(x.into_either(<span class="bool-val">false</span>), Right(x));</code></pre></div></div></details><details class="toggle method-toggle" open><summary><section id="method.into_either_with" class="method"><a class="src rightside" href="../src/either/into_either.rs.html#55-61">Source</a><h4 class="code-header">fn <a href="#method.into_either_with" class="fn">into_either_with</a><F>(self, into_left: F) -> <a class="enum" href="enum.Either.html" title="enum either::Either">Either</a><Self, Self> <a href="#" class="tooltip" data-notable-ty="Either<Self, Self>">ⓘ</a><div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/1.93.1/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self) -> <a class="primitive" href="https://doc.rust-lang.org/1.93.1/std/primitive.bool.html">bool</a>,</div></h4></section></summary><div class="docblock"><p>Converts <code>self</code> into a <a href="enum.Either.html#variant.Left" title="variant either::Either::Left"><code>Left</code></a> variant of <a href="enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a>
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if <code>into_left(&self)</code> returns <code>true</code>.
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Converts <code>self</code> into a <a href="enum.Either.html#variant.Right" title="variant either::Either::Right"><code>Right</code></a> variant of <a href="enum.Either.html" title="enum either::Either"><code>Either<Self, Self></code></a>
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otherwise.</p>
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<h5 id="examples-1"><a class="doc-anchor" href="#examples-1">§</a>Examples</h5>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>either::{IntoEither, Left, Right};
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<span class="kw">fn </span>is_even(x: <span class="kw-2">&</span>u8) -> bool {
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x % <span class="number">2 </span>== <span class="number">0
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</span>}
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<span class="kw">let </span>x = <span class="number">0</span>;
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<span class="macro">assert_eq!</span>(x.into_either_with(is_even), Left(x));
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<span class="macro">assert_eq!</span>(x.into_either_with(|x| !is_even(x)), Right(x));</code></pre></div></div></details></div><h2 id="dyn-compatibility" class="section-header">Dyn Compatibility<a href="#dyn-compatibility" class="anchor">§</a></h2><div class="dyn-compatibility-info"><p>This trait is <b>not</b> <a href="https://doc.rust-lang.org/1.93.1/reference/items/traits.html#dyn-compatibility">dyn compatible</a>.</p><p><i>In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.</i></p></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-IntoEither-for-T" class="impl"><a class="src rightside" href="../src/either/into_either.rs.html#64">Source</a><a href="#impl-IntoEither-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="trait.IntoEither.html" title="trait either::IntoEither">IntoEither</a> for T</h3></section></div><script src="../trait.impl/either/into_either/trait.IntoEither.js" async></script><script type="text/json" id="notable-traits-data">{"Either<Self, Self>":"<h3>Notable traits for <code><a class=\"enum\" href=\"enum.Either.html\" title=\"enum either::Either\">Either</a><L, R></code></h3><pre><code><div class=\"where\">impl<L, R> <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/iter/traits/iterator/trait.Iterator.html\" title=\"trait core::iter::traits::iterator::Iterator\">Iterator</a> for <a class=\"enum\" href=\"enum.Either.html\" title=\"enum either::Either\">Either</a><L, R><div class=\"where\">where\n L: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/iter/traits/iterator/trait.Iterator.html\" title=\"trait core::iter::traits::iterator::Iterator\">Iterator</a>,\n R: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/iter/traits/iterator/trait.Iterator.html\" title=\"trait core::iter::traits::iterator::Iterator\">Iterator</a><Item = L::<a class=\"associatedtype\" href=\"https://doc.rust-lang.org/1.93.1/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item\" title=\"type core::iter::traits::iterator::Iterator::Item\">Item</a>>,</div></div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.93.1/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item\" class=\"associatedtype\">Item</a> = L::<a class=\"associatedtype\" href=\"https://doc.rust-lang.org/1.93.1/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item\" title=\"type core::iter::traits::iterator::Iterator::Item\">Item</a>;</div><div class=\"where\">impl<L, R> <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a> for <a class=\"enum\" href=\"enum.Either.html\" title=\"enum either::Either\">Either</a><L, R><div class=\"where\">where\n L: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a>,\n R: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html\" title=\"trait core::future::future::Future\">Future</a><Output = L::<a class=\"associatedtype\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html#associatedtype.Output\" title=\"type core::future::future::Future::Output\">Output</a>>,</div></div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html#associatedtype.Output\" class=\"associatedtype\">Output</a> = L::<a class=\"associatedtype\" href=\"https://doc.rust-lang.org/1.93.1/core/future/future/trait.Future.html#associatedtype.Output\" title=\"type core::future::future::Future::Output\">Output</a>;</div><div class=\"where\">impl<L, R> <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/std/io/trait.Read.html\" title=\"trait std::io::Read\">Read</a> for <a class=\"enum\" href=\"enum.Either.html\" title=\"enum either::Either\">Either</a><L, R><div class=\"where\">where\n L: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/std/io/trait.Read.html\" title=\"trait std::io::Read\">Read</a>,\n R: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/std/io/trait.Read.html\" title=\"trait std::io::Read\">Read</a>,</div></div><div class=\"where\">impl<L, R> <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html\" title=\"trait std::io::Write\">Write</a> for <a class=\"enum\" href=\"enum.Either.html\" title=\"enum either::Either\">Either</a><L, R><div class=\"where\">where\n L: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html\" title=\"trait std::io::Write\">Write</a>,\n R: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.93.1/std/io/trait.Write.html\" title=\"trait std::io::Write\">Write</a>,</div></div>"}</script></section></div></main></body></html> |