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 optimizing Iterator::fuse.

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

impl FusedIterator for core::char::EscapeDebug

impl FusedIterator for core::char::EscapeDefault

impl FusedIterator for core::char::EscapeUnicode

impl FusedIterator for ToLowercase

impl FusedIterator for ToUppercase

impl<'_> FusedIterator for Bytes<'_>

impl<'_> FusedIterator for CharIndices<'_>

impl<'_> FusedIterator for Chars<'_>

impl<'_> FusedIterator for EncodeUtf16<'_>

impl<'_> FusedIterator for Lines<'_>

impl<'_> FusedIterator for LinesAny<'_>

impl<'_> FusedIterator for SplitAsciiWhitespace<'_>

impl<'_> FusedIterator for SplitWhitespace<'_>

impl<'_, A> FusedIterator for core::option::Iter<'_, A>

impl<'_, A> FusedIterator for core::option::IterMut<'_, A>

impl<'_, I: FusedIterator + ?Sized> FusedIterator for &'_ mut I

impl<'_, T> FusedIterator for core::result::Iter<'_, T>

impl<'_, T> FusedIterator for core::result::IterMut<'_, T>

impl<'_, T> FusedIterator for Chunks<'_, T>

impl<'_, T> FusedIterator for ChunksExact<'_, T>

impl<'_, T> FusedIterator for ChunksExactMut<'_, T>

impl<'_, T> FusedIterator for ChunksMut<'_, T>

impl<'_, T> FusedIterator for core::slice::Iter<'_, T>

impl<'_, T> FusedIterator for core::slice::IterMut<'_, T>

impl<'_, T> FusedIterator for RChunks<'_, T>

impl<'_, T> FusedIterator for RChunksExact<'_, T>

impl<'_, T> FusedIterator for RChunksExactMut<'_, T>

impl<'_, T> FusedIterator for RChunksMut<'_, T>

impl<'_, T> FusedIterator for Windows<'_, T>

impl<'_, T, P> FusedIterator for core::slice::RSplit<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<'_, T, P> FusedIterator for RSplitMut<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<'_, T, P> FusedIterator for core::slice::Split<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<'_, T, P> FusedIterator for SplitMut<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<'a> FusedIterator for core::str::EscapeDebug<'a>

impl<'a> FusedIterator for core::str::EscapeDefault<'a>

impl<'a> FusedIterator for core::str::EscapeUnicode<'a>

impl<'a, I, T: 'a> FusedIterator for Cloned<I> where
    I: FusedIterator<Item = &'a T>,
    T: Clone, 

impl<'a, I, T: 'a> FusedIterator for Copied<I> where
    I: FusedIterator<Item = &'a T>,
    T: Copy, 

impl<'a, P: Pattern<'a>> FusedIterator for MatchIndices<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for Matches<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for RMatchIndices<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 

impl<'a, P: Pattern<'a>> FusedIterator for RMatches<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 

impl<'a, P: Pattern<'a>> FusedIterator for core::str::RSplit<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 

impl<'a, P: Pattern<'a>> FusedIterator for core::str::RSplitN<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 

impl<'a, P: Pattern<'a>> FusedIterator for RSplitTerminator<'a, P> where
    P::Searcher: ReverseSearcher<'a>, 

impl<'a, P: Pattern<'a>> FusedIterator for core::str::Split<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for core::str::SplitN<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for SplitTerminator<'a, P>

impl<'a, T, P> FusedIterator for core::slice::RSplitN<'a, T, P> where
    P: FnMut(&T) -> bool, 

impl<'a, T, P> FusedIterator for RSplitNMut<'a, T, P> where
    P: FnMut(&T) -> bool, 

impl<'a, T, P> FusedIterator for core::slice::SplitN<'a, T, P> where
    P: FnMut(&T) -> bool, 

impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where
    P: FnMut(&T) -> bool, 

impl<A> FusedIterator for core::option::IntoIter<A>

impl<A, B> FusedIterator for Chain<A, B> where
    A: FusedIterator,
    B: FusedIterator<Item = A::Item>, 

impl<A, B> FusedIterator for Zip<A, B> where
    A: FusedIterator,
    B: FusedIterator, 

impl<A, F: FnMut() -> A> FusedIterator for RepeatWith<F>

impl<A, F: FnOnce() -> A> FusedIterator for OnceWith<F>

impl<A: Clone> FusedIterator for Repeat<A>

impl<A: Step> FusedIterator for Range<A>

impl<A: Step> FusedIterator for RangeFrom<A>

impl<A: Step> FusedIterator for RangeInclusive<A>

impl<B, I: FusedIterator, F> FusedIterator for FilterMap<I, F> where
    F: FnMut(I::Item) -> Option<B>, 

impl<B, I: FusedIterator, F> FusedIterator for Map<I, F> where
    F: FnMut(I::Item) -> B, 

impl<I> FusedIterator for Cycle<I> where
    I: Clone + Iterator, 

impl<I> FusedIterator for Enumerate<I> where
    I: FusedIterator, 

impl<I> FusedIterator for Fuse<I> where
    I: Iterator, 

impl<I> FusedIterator for Rev<I> where
    I: FusedIterator + DoubleEndedIterator, 

impl<I> FusedIterator for Skip<I> where
    I: FusedIterator, 

impl<I> FusedIterator for Take<I> where
    I: FusedIterator, 

impl<I, P> FusedIterator for SkipWhile<I, P> where
    I: FusedIterator,
    P: FnMut(&I::Item) -> bool, 

impl<I, P> FusedIterator for TakeWhile<I, P> where
    I: FusedIterator,
    P: FnMut(&I::Item) -> bool, 

impl<I, U> FusedIterator for Flatten<I> where
    I: FusedIterator,
    U: Iterator,
    I::Item: IntoIterator<IntoIter = U, Item = U::Item>, 

impl<I, U, F> FusedIterator for FlatMap<I, U, F> where
    I: FusedIterator,
    U: IntoIterator,
    F: FnMut(I::Item) -> U, 

impl<I: FusedIterator> FusedIterator for Peekable<I>

impl<I: FusedIterator, F> FusedIterator for Inspect<I, F> where
    F: FnMut(&I::Item), 

impl<I: FusedIterator, P> FusedIterator for Filter<I, P> where
    P: FnMut(&I::Item) -> bool, 

impl<T> FusedIterator for Empty<T>

impl<T> FusedIterator for Once<T>

impl<T> FusedIterator for core::result::IntoIter<T>

impl<T, F> FusedIterator for Successors<T, F> where
    F: FnMut(&T) -> Option<T>, 

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