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<p class='location'>Trait PeekingNext</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.peeking_next">peeking_next</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-PeekingNext">Peekable<I></a><a href="#impl-PeekingNext">Iter<'a, T></a><a href="#impl-PeekingNext">Chars<'a></a><a href="#impl-PeekingNext">CharIndices<'a></a><a href="#impl-PeekingNext">Bytes<'a></a><a href="#impl-PeekingNext">Iter<'a, T></a><a href="#impl-PeekingNext">Iter<'a, T></a><a href="#impl-PeekingNext">Empty<T></a><a href="#impl-PeekingNext">Iter<'a, T></a><a href="#impl-PeekingNext">Iter<'a, T></a><a href="#impl-PeekingNext">Rev<I></a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='index.html'>itertools</a></p><script>window.sidebarCurrent = {name: 'PeekingNext', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Trait <a href='index.html'>itertools</a>::<wbr><a class="trait" href=''>PeekingNext</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#15-21' title='goto source code'>[src]</a></span></h1>
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<pre class='rust trait'>pub trait PeekingNext: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> {
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fn <a href='#tymethod.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>><br> <span class="where">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></span>;
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}</pre><div class='docblock'><p>An iterator that allows peeking at an element before deciding to accept it.</p>
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<p>See <a href="trait.Itertools.html#method.peeking_take_while"><code>.peeking_take_while()</code></a>
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for more information.</p>
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<p>This is implemented by peeking adaptors like peekable and put back,
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but also by a few iterators that can be peeked natively, like the slice’s
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by reference iterator (<code>std::slice::Iter</code>).</p>
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<h2 id='required-methods' class='small-section-header'>
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Required Methods<a href='#required-methods' class='anchor'></a>
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<div class='methods'>
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<h3 id='tymethod.peeking_next' class='method'><span id='peeking_next.v' class='invisible'><code>fn <a href='#tymethod.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span></h3><div class='docblock'><p>Pass a reference to the next iterator element to the closure <code>accept</code>;
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if <code>accept</code> returns true, return it as the next element,
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else None.</p>
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</div></div>
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<h2 id='foreign-impls' class='small-section-header'>
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Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a>
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</h2>
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<h3 id='impl-PeekingNext' class='impl'><span class='in-band'><code>impl<I> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/iter/struct.Peekable.html" title="struct core::iter::Peekable">Peekable</a><I> <span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>, </span></code><a href='#impl-PeekingNext' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#23-36' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next' class="method"><span id='peeking_next.v-1' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#26-35' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-1' class='impl'><span class='in-band'><code>impl<'a, T> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/slice/struct.Iter.html" title="struct core::slice::Iter">Iter</a><'a, T></code><a href='#impl-PeekingNext-1' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-1' class="method"><span id='peeking_next.v-2' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-2' class='impl'><span class='in-band'><code>impl<'a> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/struct.Chars.html" title="struct core::str::Chars">Chars</a><'a></code><a href='#impl-PeekingNext-2' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-2' class="method"><span id='peeking_next.v-3' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-3' class='impl'><span class='in-band'><code>impl<'a> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/struct.CharIndices.html" title="struct core::str::CharIndices">CharIndices</a><'a></code><a href='#impl-PeekingNext-3' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-3' class="method"><span id='peeking_next.v-4' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-4' class='impl'><span class='in-band'><code>impl<'a> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/struct.Bytes.html" title="struct core::str::Bytes">Bytes</a><'a></code><a href='#impl-PeekingNext-4' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-4' class="method"><span id='peeking_next.v-5' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-5' class='impl'><span class='in-band'><code>impl<'a, T> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/option/struct.Iter.html" title="struct core::option::Iter">Iter</a><'a, T></code><a href='#impl-PeekingNext-5' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-5' class="method"><span id='peeking_next.v-6' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-6' class='impl'><span class='in-band'><code>impl<'a, T> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/result/struct.Iter.html" title="struct core::result::Iter">Iter</a><'a, T></code><a href='#impl-PeekingNext-6' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-6' class="method"><span id='peeking_next.v-7' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-7' class='impl'><span class='in-band'><code>impl<T> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/iter/sources/struct.Empty.html" title="struct core::iter::sources::Empty">Empty</a><T></code><a href='#impl-PeekingNext-7' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-7' class="method"><span id='peeking_next.v-8' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-8' class='impl'><span class='in-band'><code>impl<'a, T> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/linked_list/struct.Iter.html" title="struct alloc::linked_list::Iter">Iter</a><'a, T></code><a href='#impl-PeekingNext-8' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
|
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-8' class="method"><span id='peeking_next.v-9' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span><h3 id='impl-PeekingNext-9' class='impl'><span class='in-band'><code>impl<'a, T> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec_deque/struct.Iter.html" title="struct alloc::vec_deque::Iter">Iter</a><'a, T></code><a href='#impl-PeekingNext-9' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
|
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-9' class="method"><span id='peeking_next.v-10' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
|
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</div></span><h3 id='impl-PeekingNext-10' class='impl'><span class='in-band'><code>impl<I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> + <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.DoubleEndedIterator.html" title="trait core::iter::traits::DoubleEndedIterator">DoubleEndedIterator</a>> <a class="trait" href="../itertools/trait.PeekingNext.html" title="trait itertools::PeekingNext">PeekingNext</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/core/iter/struct.Rev.html" title="struct core::iter::Rev">Rev</a><I></code><a href='#impl-PeekingNext-10' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#117-131' title='goto source code'>[src]</a></span></h3>
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<span class='docblock autohide'><div class='impl-items'><h4 id='method.peeking_next-10' class="method"><span id='peeking_next.v-11' class='invisible'><code>fn <a href='#method.peeking_next' class='fnname'>peeking_next</a><F>(&mut self, accept: F) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#118-130' title='goto source code'>[src]</a></span></h4>
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</div></span>
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<h2 id='implementors' class='small-section-header'>
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Implementors<a href='#implementors' class='anchor'></a>
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</h2>
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<ul class='item-list' id='implementors-list'>
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<li><div class='out-of-band'><a class='srclink' href='../src/itertools/multipeek_impl.rs.html#61-78' title='goto source code'>[src]</a></div><code>impl<I> PeekingNext for <a class="struct" href="../itertools/structs/struct.MultiPeek.html" title="struct itertools::structs::MultiPeek">MultiPeek</a><I> <span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>, </span></code></li>
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<li><div class='out-of-band'><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#38-54' title='goto source code'>[src]</a></div><code>impl<I> PeekingNext for <a class="struct" href="../itertools/structs/struct.PutBack.html" title="struct itertools::structs::PutBack">PutBack</a><I> <span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>, </span></code></li>
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<li><div class='out-of-band'><a class='srclink' href='../src/itertools/peeking_take_while.rs.html#57-73' title='goto source code'>[src]</a></div><code>impl<I> PeekingNext for <a class="struct" href="../itertools/structs/struct.PutBackN.html" title="struct itertools::structs::PutBackN">PutBackN</a><I> <span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>, </span></code></li>
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