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 SplitAsciiWhitespace<'a>

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

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

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

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

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

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

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

impl<'a, T, P> FusedIterator for SplitMut<'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<I> FusedIterator for Take<I> where     I: FusedIterator,

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

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

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for ToLowercase

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

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

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

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

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

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

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

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

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

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

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

impl FusedIterator for EscapeUnicode

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

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

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

impl FusedIterator for ToUppercase

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

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

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

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

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

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

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

impl<T> FusedIterator for Once<T>

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

impl<T> FusedIterator for Empty<T>

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

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

impl FusedIterator for EscapeDebug

impl FusedIterator for std::ascii::EscapeDefault

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

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

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

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

impl<T> FusedIterator for std::collections::btree_set::IntoIter<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<'a, K, V> FusedIterator for std::collections::btree_map::Range<'a, K, V>

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<'a, K, V> FusedIterator for RangeMut<'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::vec_deque::Drain<'a, T> where     T: 'a,

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

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

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