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