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.

Implementations on Foreign Types

impl<I> FusedIterator for Utf16Encoder<I> where     I: FusedIterator<Item = char>,

Implementors

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

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

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

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

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

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

• impl<I> FusedIterator for DecodeUtf8<I> where     I: FusedIterator<Item = u8>,

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

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

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

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

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

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

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

• impl<T> FusedIterator for Empty<T>

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

• impl FusedIterator for std::char::EscapeDefault

• impl<T> FusedIterator for Once<T>

• 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 RangeInclusive<A> where     A: Step,

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

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

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

• impl FusedIterator for EscapeUnicode

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

• impl FusedIterator for std::ascii::EscapeDefault

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

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

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

• impl FusedIterator for EscapeDebug

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

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

• 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 CharIndices<'a>

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

• impl<'a, T, P> FusedIterator for std::slice::RSplitN<'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, P> FusedIterator for RMatchIndices<'a, P> where     P: Pattern<'a>,     <P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

• 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::binary_heap::Iter<'a, T>

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

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

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

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

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

• impl FusedIterator for ToLowercase

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

• impl FusedIterator for ToUppercase

• 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>