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

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

impl FusedIterator for std::char::EscapeDefault

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

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

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

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

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

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

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

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

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

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

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

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

impl<'a, T, P> FusedIterator for SplitMut<'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, F> FusedIterator for RepeatWith<F> where     F: FnMut() -> A,

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

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

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

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

impl FusedIterator for EscapeUnicode

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 SplitWhitespace<'a>

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

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

impl<T> FusedIterator for Once<T>

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

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

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

impl FusedIterator for EscapeDebug

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

impl FusedIterator for std::ascii::EscapeDefault

impl FusedIterator for ToUppercase

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

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

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

impl FusedIterator for ToLowercase

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

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

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

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

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

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> FusedIterator for Bytes<'a>

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

impl<T> FusedIterator for Empty<T>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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::ValuesMut<'a, K, V>

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

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

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

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

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

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::Range<'a, K, V>

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

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

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

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

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

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