Trait std::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<I, U> FusedIterator for Flatten<I> where     I: FusedIterator,     U: Iterator,     <I as Iterator>::Item: IntoIterator,     <<I as Iterator>::Item as IntoIterator>::IntoIter == U,     <<I as Iterator>::Item as IntoIterator>::Item == <U as Iterator>::Item,

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

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

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

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

impl<T> FusedIterator for Empty<T>

impl FusedIterator for ToUppercase

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

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

impl FusedIterator for std::char::EscapeDefault

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

impl FusedIterator for std::ascii::EscapeDefault

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

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

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

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

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

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

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

impl<T> FusedIterator for Once<T>

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

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

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

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

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

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

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

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

impl FusedIterator for EscapeDebug

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

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for ToLowercase

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<A> FusedIterator for std::ops::Range<A> where     A: Step,

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

impl FusedIterator for EscapeUnicode

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

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

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

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

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

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

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

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

impl<T> FusedIterator for std::collections::linked_list::IntoIter<T>

impl<'a, T> FusedIterator for std::collections::binary_heap::Drain<'a, T> where     T: 'a,

impl<'a, T> FusedIterator for std::collections::btree_set::Difference<'a, T> where     T: Ord,

impl<'a, T> FusedIterator for std::collections::btree_set::SymmetricDifference<'a, T> where     T: Ord,

impl<'a, K, V> FusedIterator for std::collections::btree_map::Values<'a, K, V>

impl<'a, T> FusedIterator for std::collections::vec_deque::Drain<'a, T> where     T: 'a,

impl<'a, T> FusedIterator for std::collections::binary_heap::Iter<'a, T>

impl<T> FusedIterator for std::vec::IntoIter<T>

impl<'a, T> FusedIterator for std::vec::Drain<'a, T>

impl<'a, T> FusedIterator for std::collections::btree_set::Intersection<'a, T> where     T: Ord,

impl<'a, T> FusedIterator for std::collections::linked_list::IterMut<'a, T>

impl<T> FusedIterator for std::collections::btree_set::IntoIter<T>

impl<I> FusedIterator for Box<I> where     I: FusedIterator + ?Sized,

impl<'a, T> FusedIterator for std::collections::btree_set::Range<'a, T>

impl<'a, T> FusedIterator for std::collections::btree_set::Iter<'a, T>

impl<'a, K, V> FusedIterator for std::collections::btree_map::IterMut<'a, K, V>

impl<'a, T> FusedIterator for std::collections::vec_deque::IterMut<'a, T>

impl<'a, K, V> FusedIterator for std::collections::btree_map::Range<'a, K, V>

impl<T> FusedIterator for std::collections::vec_deque::IntoIter<T>

impl<'a, K, V> FusedIterator for std::collections::btree_map::ValuesMut<'a, K, V>

impl<'a, T> FusedIterator for std::collections::linked_list::Iter<'a, T>

impl<'a, T> FusedIterator for std::collections::vec_deque::Iter<'a, T>

impl<'a, K, V> FusedIterator for std::collections::btree_map::Iter<'a, K, V>

impl<K, V> FusedIterator for std::collections::btree_map::IntoIter<K, V>

impl<T> FusedIterator for std::collections::binary_heap::IntoIter<T>

impl<'a, T> FusedIterator for std::collections::btree_set::Union<'a, T> where     T: Ord,

impl<'a, K, V> FusedIterator for std::collections::btree_map::Keys<'a, K, V>

impl<'a> FusedIterator for std::string::Drain<'a>

impl<'a, K, V> FusedIterator for RangeMut<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Iter<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::IterMut<'a, K, V>

impl<K, V> FusedIterator for std::collections::hash_map::IntoIter<K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Keys<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Values<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::ValuesMut<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Drain<'a, K, V>

impl<'a, K> FusedIterator for std::collections::hash_set::Iter<'a, K>

impl<K> FusedIterator for std::collections::hash_set::IntoIter<K>

impl<'a, K> FusedIterator for std::collections::hash_set::Drain<'a, K>

impl<'a, T, S> FusedIterator for std::collections::hash_set::Intersection<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a, T, S> FusedIterator for std::collections::hash_set::Difference<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a, T, S> FusedIterator for std::collections::hash_set::SymmetricDifference<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a, T, S> FusedIterator for std::collections::hash_set::Union<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a> FusedIterator for std::path::Iter<'a>

impl<'a> FusedIterator for Components<'a>

impl<'a> FusedIterator for Ancestors<'a>