Trait `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 Bytes<'_>
impl FusedIterator for Bytes<'_>
impl FusedIterator for CaseMappingIter
impl FusedIterator for CharIndices<'_>
impl FusedIterator for Chars<'_>
impl FusedIterator for EncodeUtf16<'_>
impl FusedIterator for EncodeWide<'_>
impl FusedIterator for EscapeDebug
impl FusedIterator for EscapeDefault
impl FusedIterator for EscapeDefault
impl FusedIterator for EscapeUnicode
impl FusedIterator for IndexRange
impl FusedIterator for Lines<'_>
impl FusedIterator for LinesAny<'_>
impl FusedIterator for SplitAsciiWhitespace<'_>
impl FusedIterator for SplitWhitespace<'_>
impl FusedIterator for ToCasefold
impl FusedIterator for ToLowercase
impl FusedIterator for ToTitlecase
impl FusedIterator for ToUppercase
impl FusedIterator for Utf8Chunks<'_>
impl<'a> FusedIterator for EscapeAscii<'a>
impl<'a> FusedIterator for EscapeDebug<'a>
impl<'a> FusedIterator for EscapeDefault<'a>
impl<'a> FusedIterator for EscapeUnicode<'a>
impl<'a> FusedIterator for Source<'a>
impl<'a, I, T> FusedIterator for Cloned where I: FusedIterator<Item = &'a T>, T: Clone + 'a,
impl<'a, I, T> FusedIterator for Copied where I: FusedIterator<Item = &'a T>, T: Copy + 'a,
impl<'a, P> FusedIterator for RMatchIndices<'a, P> where P: Pattern<Searcher<'a>: ReverseSearcher<'a>>,
impl<'a, P> FusedIterator for RMatches<'a, P> where P: Pattern<Searcher<'a>: ReverseSearcher<'a>>,
impl<'a, P> FusedIterator for RSplit<'a, P> where P: Pattern<Searcher<'a>: ReverseSearcher<'a>>,
impl<'a, P> FusedIterator for RSplitN<'a, P> where P: Pattern<Searcher<'a>: ReverseSearcher<'a>>,
impl<'a, P> FusedIterator for RSplitTerminator<'a, P> where P: Pattern<Searcher<'a>: ReverseSearcher<'a>>,
impl<'a, P: Pattern> FusedIterator for MatchIndices<'a, P>
impl<'a, P: Pattern> FusedIterator for Matches<'a, P>
impl<'a, P: Pattern> FusedIterator for Split<'a, P>
impl<'a, P: Pattern> FusedIterator for SplitInclusive<'a, P>
impl<'a, P: Pattern> FusedIterator for SplitN<'a, P>
impl<'a, P: Pattern> FusedIterator for SplitTerminator<'a, P>
impl<'a, T, P> FusedIterator for 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 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, T: 'a, P> FusedIterator for ChunkBy<'a, T, P> where P: FnMut(&T, &T) -> bool,
impl<'a, T: 'a, P> FusedIterator for ChunkByMut<'a, T, P> where P: FnMut(&T, &T) -> bool,
impl<A> FusedIterator for IntoIter<A>
impl<A> FusedIterator for Item<A>
impl<A> FusedIterator for Iter<'_, A>
impl<A> FusedIterator for IterMut<'_, 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: Clone> FusedIterator for RepeatN<A>
impl<A: FusedIterator> FusedIterator for OptionFlatten<A>
impl<A: Step> FusedIterator for Range<A>
impl<A: Step> FusedIterator for RangeFrom<A>
impl<A: Step> FusedIterator for RangeFromIter<A>
impl<A: Step> FusedIterator for RangeInclusive<A>
impl<A: Step> FusedIterator for RangeInclusiveIter<A>
impl<A: Step> FusedIterator for RangeIter<A>
impl<B, I: FusedIterator, F> FusedIterator for FilterMap<I, F> where F: FnMut(I::Item) -> Option,
impl<B, I: FusedIterator, F> FusedIterator for Map<I, F> where F: FnMut(I::Item) -> B,
impl FusedIterator for Cycle where I: Clone + Iterator,
impl FusedIterator for Enumerate where I: FusedIterator,
impl FusedIterator for Fuse where I: Iterator,
impl FusedIterator for Rev where I: FusedIterator + DoubleEndedIterator,
impl FusedIterator for Skip where I: FusedIterator,
impl FusedIterator for StepBy where I: FusedIterator,
impl FusedIterator for Take where I: FusedIterator,
impl<I, F, R, const N: usize> FusedIterator for MapWindows<I, F, N> where I: FusedIterator, F: FnMut(&[I::Item; N]) -> R,
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 where I: FusedIterator<Item: IntoIterator<IntoIter = U, Item = U::Item>>, U: Iterator,
impl<I, U, F> FusedIterator for FlatMap<I, U, F> where I: FusedIterator, U: IntoIterator, F: FnMut(I::Item) -> U,
impl<I, const N: usize> FusedIterator for ArrayChunks<I, N> where I: FusedIterator,
impl<I: FusedIterator + ?Sized> FusedIterator for &mut I
impl<I: FusedIterator> FusedIterator for Peekable
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<I: Iterator<Item = u16> + FusedIterator> FusedIterator for DecodeUtf16
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 Empty<T>
impl<T> FusedIterator for IntoIter<T>
impl<T> FusedIterator for Iter<'_, T>
impl<T> FusedIterator for Iter<'_, T>
impl<T> FusedIterator for IterMut<'_, T>
impl<T> FusedIterator for IterMut<'_, T>
impl<T> FusedIterator for Once<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, F> FusedIterator for Successors<T, F> where F: FnMut(&T) -> Option<T>,
impl<T, P> FusedIterator for 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 Split<'_, T, P> where P: FnMut(&T) -> bool,
impl<T, P> FusedIterator for SplitInclusive<'_, T, P> where P: FnMut(&T) -> bool,
impl<T, P> FusedIterator for SplitInclusiveMut<'_, T, P> where P: FnMut(&T) -> bool,
impl<T, P> FusedIterator for SplitMut<'_, T, P> where P: FnMut(&T) -> bool,
impl<T, const N: usize> FusedIterator for ArrayWindows<'_, T, N>
impl<T, const N: usize> FusedIterator for IntoIter<T, N>