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