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

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

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

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

impl FusedIterator for ToLowercase

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for EscapeDebug

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

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

impl FusedIterator for std::ascii::EscapeDefault

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

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

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

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

impl FusedIterator for EscapeUnicode

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

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

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

impl<T> FusedIterator for Once<T>

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

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

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

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

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

impl FusedIterator for std::char::EscapeDefault

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 SplitTerminator<'a, P> where     P: Pattern<'a>,

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

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

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

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

impl FusedIterator for ToUppercase

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

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

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

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

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

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

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

impl<'a> FusedIterator for SplitAsciiWhitespace<'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 Repeat<A> where     A: Clone,

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

impl<T> FusedIterator for Empty<T>

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

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

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

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

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

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

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

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::vec_deque::IntoIter<T>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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>