Trait std::iter::FusedIterator 1.26.0[−][src]
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> FusedIterator for Chars<'a>impl<'a> FusedIterator for Lines<'a>impl<A> FusedIterator for RangeInclusive<A> where
A: Step,impl<T> FusedIterator for std::result::IntoIter<T>impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a, T> FusedIterator for std::result::Iter<'a, T>impl<I> FusedIterator for Skip<I> where
I: FusedIterator,impl<'a> FusedIterator for LinesAny<'a>impl<'a, T, P> FusedIterator for RSplitMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<A, B> FusedIterator for Zip<A, B> where
A: FusedIterator,
B: FusedIterator,impl<'a> FusedIterator for EncodeUtf16<'a>impl<'a, T> FusedIterator for Windows<'a, T>impl<'a, P> FusedIterator for SplitTerminator<'a, P> where
P: Pattern<'a>,impl FusedIterator for EscapeDebugimpl<I> FusedIterator for Enumerate<I> where
I: FusedIterator,impl<'a, P> FusedIterator for std::str::Split<'a, P> where
P: Pattern<'a>,impl FusedIterator for EscapeUnicodeimpl<A> FusedIterator for std::ops::Range<A> where
A: Step,impl<I> FusedIterator for Fuse<I> where
I: Iterator,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 std::slice::RSplit<'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 std::char::EscapeDefaultimpl<'a, T> FusedIterator for ExactChunks<'a, T>impl<B, I, F> FusedIterator for Map<I, F> where
F: FnMut(<I as Iterator>::Item) -> B,
I: FusedIterator,impl<'a, T> FusedIterator for Chunks<'a, T>impl<'a, T> FusedIterator for ExactChunksMut<'a, T>impl<A> FusedIterator for RangeFrom<A> where
A: Step,impl<'a, T, P> FusedIterator for std::slice::SplitN<'a, T, P> where
P: FnMut(&T) -> bool,impl<I, P> FusedIterator for TakeWhile<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<T> FusedIterator for Once<T>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 SplitMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a, T> FusedIterator for std::result::IterMut<'a, T>impl<'a, T> FusedIterator for std::slice::IterMut<'a, T>impl<'a, T> FusedIterator for std::slice::Iter<'a, T>impl<A> FusedIterator for std::option::IntoIter<A>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 RSplitNMut<'a, T, P> where
P: FnMut(&T) -> bool,impl FusedIterator for ToLowercaseimpl<'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 Take<I> where
I: FusedIterator,impl<A> FusedIterator for Repeat<A> where
A: Clone,impl FusedIterator for ToUppercaseimpl<I> FusedIterator for Peekable<I> where
I: FusedIterator,impl<I, F> FusedIterator for Inspect<I, F> where
F: FnMut(&<I as Iterator>::Item),
I: FusedIterator,impl<'a> FusedIterator for Bytes<'a>impl<I, P> FusedIterator for Filter<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<'a, I> FusedIterator for &'a mut I where
I: FusedIterator + ?Sized,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, P> FusedIterator for MatchIndices<'a, P> where
P: Pattern<'a>,impl<A, F> FusedIterator for RepeatWith<F> where
F: FnMut() -> A,impl<A, B> FusedIterator for Chain<A, B> where
A: FusedIterator,
B: FusedIterator<Item = <A as Iterator>::Item>,impl<'a, T, P> FusedIterator for std::slice::RSplitN<'a, T, P> where
P: FnMut(&T) -> bool,impl<I> FusedIterator for Rev<I> where
I: FusedIterator + DoubleEndedIterator,impl FusedIterator for std::ascii::EscapeDefaultimpl<'a, I, T> FusedIterator for Cloned<I> where
I: FusedIterator<Item = &'a T>,
T: 'a + Clone,impl<T> FusedIterator for Empty<T>impl<'a> FusedIterator for SplitWhitespace<'a>impl<'a, P> FusedIterator for Matches<'a, P> where
P: Pattern<'a>,impl<'a, T> FusedIterator for ChunksMut<'a, T>impl<I, P> FusedIterator for SkipWhile<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<I> FusedIterator for DecodeUtf8<I> where
I: FusedIterator<Item = u8>,impl<'a, A> FusedIterator for std::option::IterMut<'a, A>impl<'a> FusedIterator for CharIndices<'a>impl<I> FusedIterator for Cycle<I> where
I: Clone + 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, A> FusedIterator for std::option::Iter<'a, A>impl<K, V> FusedIterator for std::collections::btree_map::IntoIter<K, V>impl<'a, T> FusedIterator for std::collections::btree_set::Intersection<'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::btree_set::SymmetricDifference<'a, T> where
T: Ord,impl<T> FusedIterator for std::collections::btree_set::IntoIter<T>impl<'a, K, V> FusedIterator for std::collections::btree_map::Range<'a, K, V>impl<'a, T> FusedIterator for std::collections::btree_set::Iter<'a, T>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::binary_heap::Iter<'a, T>impl<'a, T> FusedIterator for std::vec::Drain<'a, T>impl<'a, K, V> FusedIterator for std::collections::btree_map::Iter<'a, K, V>impl<T> FusedIterator for std::collections::linked_list::IntoIter<T>impl<I> FusedIterator for Box<I> where
I: FusedIterator + ?Sized,impl<'a, T> FusedIterator for std::collections::linked_list::Iter<'a, T>impl<'a, K, V> FusedIterator for std::collections::btree_map::Values<'a, K, V>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<'a, K, V> FusedIterator for RangeMut<'a, K, V>impl<T> FusedIterator for std::collections::vec_deque::IntoIter<T>impl<'a, T> FusedIterator for std::collections::linked_list::IterMut<'a, T>impl<'a, T> FusedIterator for std::collections::vec_deque::Iter<'a, T>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::IterMut<'a, K, V>impl<T> FusedIterator for std::collections::binary_heap::IntoIter<T>impl<'a> FusedIterator for std::string::Drain<'a>impl<'a, T> FusedIterator for std::collections::vec_deque::IterMut<'a, T>impl<'a, T> FusedIterator for std::collections::btree_set::Range<'a, 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>