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

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

impl FusedIterator for std::char::EscapeDefault

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

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

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

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

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

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 ExactChunksMut<'a, T>

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

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

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

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

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

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

impl FusedIterator for EscapeUnicode

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

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

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

impl<T> FusedIterator for Once<T>

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

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

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

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

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

impl FusedIterator for ToLowercase

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

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for EscapeDebug

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

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

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

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

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

impl<T> FusedIterator for Empty<T>

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

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for std::ascii::EscapeDefault

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

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

impl FusedIterator for ToUppercase

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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>