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

impl FusedIterator for EscapeUnicode

impl FusedIterator for core::char::EscapeDefault

impl FusedIterator for EscapeDebug

impl FusedIterator for ToLowercase

impl FusedIterator for ToUppercase

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

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

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

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

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

impl<T> FusedIterator for Empty<T>

impl<T> FusedIterator for Once<T>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<'a, T> FusedIterator for ExactChunks<'a, T>

impl<'a, T> FusedIterator for ExactChunksMut<'a, T>

impl<'a> FusedIterator for Chars<'a>

impl<'a> FusedIterator for CharIndices<'a>

impl<'a> FusedIterator for Bytes<'a>

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

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

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

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

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

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

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

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

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

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

impl<'a> FusedIterator for Lines<'a>

impl<'a> FusedIterator for LinesAny<'a>

impl<'a> FusedIterator for SplitWhitespace<'a>

impl<'a> FusedIterator for SplitAsciiWhitespace<'a>

impl<'a> FusedIterator for EncodeUtf16<'a>