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

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

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

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

impl FusedIterator for ToUppercase

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for std::char::EscapeDefault

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for ToLowercase

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

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

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

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

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

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

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

impl<T> FusedIterator for Once<T>

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

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

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

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

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

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

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

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

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

impl<T> FusedIterator for Empty<T>

impl FusedIterator for EscapeUnicode

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

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

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

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

impl FusedIterator for std::ascii::EscapeDefault

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for EscapeDebug

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

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

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

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

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

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

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::collections::binary_heap::Drain<'a, T> where     T: 'a,

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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