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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 streaming iterator able to yield elements from both ends."><title>DoubleEndedStreamingIterator in streaming_iterator - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="streaming_iterator" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../streaming_iterator/index.html">streaming_iterator</a><span class="version">0.1.9</span></h2></div><h2 class="location"><a href="#">DoubleEndedStreamingIterator</a></h2><div class="sidebar-elems"><section><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.advance_back">advance_back</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.next_back">next_back</a></li><li><a href="#method.rfold">rfold</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In crate streaming_iterator</a></h2></div></nav><div class="sidebar-resizer"></div>
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../streaming_iterator/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Trait <a href="index.html">streaming_iterator</a>::<wbr><a class="trait" href="#">DoubleEndedStreamingIterator</a><button id="copy-path" title="Copy item path to clipboard"><img src="../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../src/streaming_iterator/lib.rs.html#523-556">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub trait DoubleEndedStreamingIterator: <a class="trait" href="trait.StreamingIterator.html" title="trait streaming_iterator::StreamingIterator">StreamingIterator</a> {
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// Required method
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fn <a href="#tymethod.advance_back" class="fn">advance_back</a>(&mut self);
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// Provided methods
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fn <a href="#method.next_back" class="fn">next_back</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>> { ... }
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<span class="item-spacer"></span> fn <a href="#method.rfold" class="fn">rfold</a><B, F>(self, init: B, f: F) -> B
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<span class="where">where Self: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(B, &Self::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>) -> B</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>A streaming iterator able to yield elements from both ends.</p>
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</div></details><h2 id="required-methods" class="section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="tymethod.advance_back" class="method"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#530">source</a><h4 class="code-header">fn <a href="#tymethod.advance_back" class="fn">advance_back</a>(&mut self)</h4></section></summary><div class="docblock"><p>Advances the iterator to the next element from the back of the iterator.</p>
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<p>Double ended iterators just after the last element, so this should be called before <code>get</code>
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when iterating in reverse.</p>
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<p>The behavior of calling this method after the iterator has been exhausted is unspecified.</p>
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</div></details></div><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.next_back" class="method"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#538-541">source</a><h4 class="code-header">fn <a href="#method.next_back" class="fn">next_back</a>(&mut self) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&Self::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>></h4></section></summary><div class="docblock"><p>Advances the iterator and returns the next value from the back.</p>
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<p>The behavior of calling this method after the iterator has been exhausted is unspecified.</p>
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<p>The default implementation simply calls <code>advance_back</code> followed by <code>get</code>.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.rfold" class="method"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#545-555">source</a><h4 class="code-header">fn <a href="#method.rfold" class="fn">rfold</a><B, F>(self, init: B, f: F) -> B<div class="where">where
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Self: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(B, &Self::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>) -> B,</div></h4></section></summary><div class="docblock"><p>Reduces the iterator’s elements to a single, final value, starting from the back.</p>
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</div></details></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-DoubleEndedStreamingIterator-for-ConvertMut%3C'a,+I,+T%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/sources.rs.html#414-431">source</a><a href="#impl-DoubleEndedStreamingIterator-for-ConvertMut%3C'a,+I,+T%3E" class="anchor">§</a><h3 class="code-header">impl<'a, I, T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.ConvertMut.html" title="struct streaming_iterator::ConvertMut">ConvertMut</a><'a, I, T><div class="where">where
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I: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="trait core::iter::traits::double_ended::DoubleEndedIterator">DoubleEndedIterator</a><Item = <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a mut T</a>>,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-ConvertRef%3C'a,+I,+T%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/sources.rs.html#346-363">source</a><a href="#impl-DoubleEndedStreamingIterator-for-ConvertRef%3C'a,+I,+T%3E" class="anchor">§</a><h3 class="code-header">impl<'a, I, T: ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.ConvertRef.html" title="struct streaming_iterator::ConvertRef">ConvertRef</a><'a, I, T><div class="where">where
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I: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="trait core::iter::traits::double_ended::DoubleEndedIterator">DoubleEndedIterator</a><Item = <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.reference.html">&'a T</a>>,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Chain%3CA,+B%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#778-819">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Chain%3CA,+B%3E" class="anchor">§</a><h3 class="code-header">impl<A, B> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Chain.html" title="struct streaming_iterator::Chain">Chain</a><A, B><div class="where">where
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A: <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a>,
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B: <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a><Item = A::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>>,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Convert%3CI%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/sources.rs.html#248-265">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Convert%3CI%3E" class="anchor">§</a><h3 class="code-header">impl<I> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Convert.html" title="struct streaming_iterator::Convert">Convert</a><I><div class="where">where
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I: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="trait core::iter::traits::double_ended::DoubleEndedIterator">DoubleEndedIterator</a>,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Rev%3CI%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#2413-2435">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Rev%3CI%3E" class="anchor">§</a><h3 class="code-header">impl<I> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Rev.html" title="struct streaming_iterator::Rev">Rev</a><I><div class="where">where
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I: <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a>,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-FilterMap%3CI,+B,+F%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#1186-1221">source</a><a href="#impl-DoubleEndedStreamingIterator-for-FilterMap%3CI,+B,+F%3E" class="anchor">§</a><h3 class="code-header">impl<I, B, F> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.FilterMap.html" title="struct streaming_iterator::FilterMap">FilterMap</a><I, B, F><div class="where">where
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I: <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a>,
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&I::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>) -> <a class="enum" href="https://doc.rust-lang.org/1.76.0/core/option/enum.Option.html" title="enum core::option::Option">Option</a><B>,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Map%3CI,+B,+F%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#1785-1804">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Map%3CI,+B,+F%3E" class="anchor">§</a><h3 class="code-header">impl<I, B, F> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Map.html" title="struct streaming_iterator::Map">Map</a><I, B, F><div class="where">where
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I: <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a>,
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&I::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>) -> B,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Filter%3CI,+F%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#1040-1072">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Filter%3CI,+F%3E" class="anchor">§</a><h3 class="code-header">impl<I, F> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Filter.html" title="struct streaming_iterator::Filter">Filter</a><I, F><div class="where">where
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I: <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a>,
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&I::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/1.76.0/core/primitive.bool.html">bool</a>,</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Inspect%3CI,+F%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/lib.rs.html#1677-1700">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Inspect%3CI,+F%3E" class="anchor">§</a><h3 class="code-header">impl<I, F> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Inspect.html" title="struct streaming_iterator::Inspect">Inspect</a><I, F><div class="where">where
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I: <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a>,
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&I::<a class="associatedtype" href="trait.StreamingIterator.html#associatedtype.Item" title="type streaming_iterator::StreamingIterator::Item">Item</a>),</div></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Empty%3CT%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/sources.rs.html#492-495">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Empty%3CT%3E" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Empty.html" title="struct streaming_iterator::Empty">Empty</a><T></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Once%3CT%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/sources.rs.html#565-570">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Once%3CT%3E" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Once.html" title="struct streaming_iterator::Once">Once</a><T></h3></section><section id="impl-DoubleEndedStreamingIterator-for-Repeat%3CT%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/sources.rs.html#650-653">source</a><a href="#impl-DoubleEndedStreamingIterator-for-Repeat%3CT%3E" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.Repeat.html" title="struct streaming_iterator::Repeat">Repeat</a><T></h3></section><section id="impl-DoubleEndedStreamingIterator-for-WindowsMut%3C'_,+T%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/slice.rs.html#136-146">source</a><a href="#impl-DoubleEndedStreamingIterator-for-WindowsMut%3C'_,+T%3E" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.WindowsMut.html" title="struct streaming_iterator::WindowsMut">WindowsMut</a><'_, T></h3></section><section id="impl-DoubleEndedStreamingIterator-for-OnceWith%3CT,+F%3E" class="impl"><a class="src rightside" href="../src/streaming_iterator/sources.rs.html#608-613">source</a><a href="#impl-DoubleEndedStreamingIterator-for-OnceWith%3CT,+F%3E" class="anchor">§</a><h3 class="code-header">impl<T, F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>() -> T> <a class="trait" href="trait.DoubleEndedStreamingIterator.html" title="trait streaming_iterator::DoubleEndedStreamingIterator">DoubleEndedStreamingIterator</a> for <a class="struct" href="struct.OnceWith.html" title="struct streaming_iterator::OnceWith">OnceWith</a><T, F></h3></section></div><script src="../trait.impl/streaming_iterator/trait.DoubleEndedStreamingIterator.js" async></script></section></div></main></body></html> |