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