1.26.0[][src]Trait core::iter::FusedIterator

pub trait FusedIterator: Iterator { }

An iterator that always continues to yield None when exhausted.

Calling next on a fused iterator that has returned None once is guaranteed to return None again. This trait should be implemented by all iterators that behave this way because it allows for some significant optimizations.

Note: In general, you should not use FusedIterator in generic bounds if you need a fused iterator. Instead, you should just call Iterator::fuse on the iterator. If the iterator is already fused, the additional Fuse wrapper will be a no-op with no performance penalty.

Implementors

impl FusedIterator for core::ascii::EscapeDefault
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impl FusedIterator for EscapeDebug
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impl FusedIterator for core::char::EscapeDefault
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impl FusedIterator for EscapeUnicode
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impl FusedIterator for ToLowercase
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impl FusedIterator for ToUppercase
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impl<'_> FusedIterator for Bytes<'_>
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impl<'_> FusedIterator for CharIndices<'_>
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impl<'_> FusedIterator for Chars<'_>
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impl<'_> FusedIterator for EncodeUtf16<'_>
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impl<'_> FusedIterator for Lines<'_>
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impl<'_> FusedIterator for LinesAny<'_>
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impl<'_> FusedIterator for SplitAsciiWhitespace<'_>
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impl<'_> FusedIterator for SplitWhitespace<'_>
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impl<'a, I, T: 'a> FusedIterator for Cloned<I> where
    I: FusedIterator<Item = &'a T>,
    T: Clone
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impl<'a, P: Pattern<'a>> FusedIterator for MatchIndices<'a, P>
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impl<'a, P: Pattern<'a>> FusedIterator for Matches<'a, P>
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impl<'a, P: Pattern<'a>> FusedIterator for RMatchIndices<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 
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impl<'a, P: Pattern<'a>> FusedIterator for RMatches<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 
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impl<'a, P: Pattern<'a>> FusedIterator for core::str::RSplit<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 
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impl<'a, P: Pattern<'a>> FusedIterator for core::str::RSplitN<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 
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impl<'a, P: Pattern<'a>> FusedIterator for RSplitTerminator<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 
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impl<'a, P: Pattern<'a>> FusedIterator for core::str::Split<'a, P>
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impl<'a, P: Pattern<'a>> FusedIterator for core::str::SplitN<'a, P>
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impl<'a, P: Pattern<'a>> FusedIterator for SplitTerminator<'a, P>
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impl<'a, T> FusedIterator for core::slice::Iter<'a, T>
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impl<'a, T> FusedIterator for core::slice::IterMut<'a, T>
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impl<'a, T> FusedIterator for RChunks<'a, T>
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impl<'a, T> FusedIterator for RChunksExact<'a, T>
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impl<'a, T> FusedIterator for RChunksExactMut<'a, T>
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impl<'a, T> FusedIterator for RChunksMut<'a, T>
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impl<'a, T, P> FusedIterator for core::slice::RSplitN<'a, T, P> where
    P: FnMut(&T) -> bool, 
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impl<'a, T, P> FusedIterator for RSplitNMut<'a, T, P> where
    P: FnMut(&T) -> bool, 
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impl<'a, T, P> FusedIterator for core::slice::SplitN<'a, T, P> where
    P: FnMut(&T) -> bool, 
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impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where
    P: FnMut(&T) -> bool, 
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impl<A> FusedIterator for core::option::IntoIter<A>
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impl<A, '_> FusedIterator for core::option::Iter<'_, A>
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impl<A, '_> FusedIterator for core::option::IterMut<'_, A>
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impl<A, B> FusedIterator for Chain<A, B> where
    A: FusedIterator,
    B: FusedIterator<Item = A::Item>, 
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impl<A, B> FusedIterator for Zip<A, B> where
    A: FusedIterator,
    B: FusedIterator
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impl<A, F: FnMut() -> A> FusedIterator for RepeatWith<F>
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impl<A: Clone> FusedIterator for Repeat<A>
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impl<A: Step> FusedIterator for Range<A>
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impl<A: Step> FusedIterator for RangeFrom<A>
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impl<A: Step> FusedIterator for RangeInclusive<A>
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impl<B, I: FusedIterator, F> FusedIterator for FilterMap<I, F> where
    F: FnMut(I::Item) -> Option<B>, 
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impl<B, I: FusedIterator, F> FusedIterator for Map<I, F> where
    F: FnMut(I::Item) -> B, 
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impl<I> FusedIterator for Cycle<I> where
    I: Clone + Iterator
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impl<I> FusedIterator for Enumerate<I> where
    I: FusedIterator
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impl<I> FusedIterator for Fuse<I> where
    I: Iterator
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impl<I> FusedIterator for Rev<I> where
    I: FusedIterator + DoubleEndedIterator
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impl<I> FusedIterator for Skip<I> where
    I: FusedIterator
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impl<I> FusedIterator for Take<I> where
    I: FusedIterator
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impl<I, P> FusedIterator for SkipWhile<I, P> where
    I: FusedIterator,
    P: FnMut(&I::Item) -> bool, 
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impl<I, P> FusedIterator for TakeWhile<I, P> where
    I: FusedIterator,
    P: FnMut(&I::Item) -> bool, 
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impl<I, U> FusedIterator for Flatten<I> where
    I: FusedIterator,
    U: Iterator,
    I::Item: IntoIterator<IntoIter = U, Item = U::Item>, 
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impl<I, U, F> FusedIterator for FlatMap<I, U, F> where
    I: FusedIterator,
    U: IntoIterator,
    F: FnMut(I::Item) -> U, 
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impl<I: FusedIterator + ?Sized, '_> FusedIterator for &'_ mut I
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impl<I: FusedIterator> FusedIterator for Peekable<I>
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impl<I: FusedIterator, F> FusedIterator for Inspect<I, F> where
    F: FnMut(&I::Item), 
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impl<I: FusedIterator, P> FusedIterator for Filter<I, P> where
    P: FnMut(&I::Item) -> bool, 
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impl<T> FusedIterator for Empty<T>
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impl<T> FusedIterator for Once<T>
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impl<T> FusedIterator for core::result::IntoIter<T>
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impl<T, '_> FusedIterator for core::result::Iter<'_, T>
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impl<T, '_> FusedIterator for core::result::IterMut<'_, T>
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impl<T, '_> FusedIterator for Chunks<'_, T>
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impl<T, '_> FusedIterator for ChunksExact<'_, T>
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impl<T, '_> FusedIterator for ChunksExactMut<'_, T>
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impl<T, '_> FusedIterator for ChunksMut<'_, T>
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impl<T, '_> FusedIterator for Windows<'_, T>
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impl<T, P, '_> FusedIterator for core::slice::RSplit<'_, T, P> where
    P: FnMut(&T) -> bool, 
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impl<T, P, '_> FusedIterator for RSplitMut<'_, T, P> where
    P: FnMut(&T) -> bool, 
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impl<T, P, '_> FusedIterator for core::slice::Split<'_, T, P> where
    P: FnMut(&T) -> bool, 
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impl<T, P, '_> FusedIterator for SplitMut<'_, T, P> where
    P: FnMut(&T) -> bool, 
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