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