Trait std::iter::FusedIterator
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[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 is 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 Box<I> where
I: FusedIterator + ?Sized,impl FusedIterator for ToUppercase
impl<I> FusedIterator for Utf16Encoder<I> where
I: FusedIterator<Item = char>,impl FusedIterator for ToLowercase
impl<'a> FusedIterator for SplitWhitespace<'a>
impl<'a, K, V> FusedIterator for std::collections::btree_map::ValuesMut<'a, K, V>
impl<'a, T> FusedIterator for std::vec::Drain<'a, T>
impl<T> FusedIterator for std::vec::IntoIter<T>
impl<'a, T> FusedIterator for std::collections::btree_set::Intersection<'a, T> where
T: Ord,impl<'a, T> FusedIterator for std::collections::btree_set::Range<'a, T>
impl<'a, K, V> FusedIterator for std::collections::btree_map::IterMut<'a, K, V>
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::linked_list::IterMut<'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::Keys<'a, K, V>
impl<T> FusedIterator for std::collections::linked_list::IntoIter<T>
impl<'a, T> FusedIterator for std::collections::binary_heap::Iter<'a, T>
impl<'a, T> FusedIterator for std::collections::binary_heap::Drain<'a, T> where
T: 'a,impl<'a, T> FusedIterator for std::collections::vec_deque::Iter<'a, T>
impl<'a, T> FusedIterator for std::collections::btree_set::SymmetricDifference<'a, T> where
T: Ord,impl<'a, T> FusedIterator for std::collections::linked_list::Iter<'a, T>
impl<T> FusedIterator for std::collections::binary_heap::IntoIter<T>
impl<'a> FusedIterator for EncodeUtf16<'a>
impl<T> FusedIterator for std::collections::btree_set::IntoIter<T>
impl<'a, K, V> FusedIterator for RangeMut<'a, K, V>
impl<'a, K, V> FusedIterator for std::collections::btree_map::Values<'a, K, V>
impl<'a, T> FusedIterator for std::collections::vec_deque::IterMut<'a, T>
impl<'a, K, V> FusedIterator for std::collections::btree_map::Range<'a, K, V>
impl<'a, T> FusedIterator for std::collections::vec_deque::Drain<'a, T> where
T: 'a,impl<'a> FusedIterator for std::string::Drain<'a>
impl<'a, T> FusedIterator for std::collections::btree_set::Difference<'a, T> where
T: Ord,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, P> FusedIterator for RSplitTerminator<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl FusedIterator for EscapeUnicode
impl<'a, P> FusedIterator for std::str::SplitN<'a, P> where
P: Pattern<'a>,impl<A, B> FusedIterator for Zip<A, B> where
A: FusedIterator,
B: FusedIterator,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<B, I, F> FusedIterator for FilterMap<I, F> where
F: FnMut(<I as Iterator>::Item) -> Option<B>,
I: FusedIterator,impl<A> FusedIterator for StepBy<A, RangeInclusive<A>> where
A: Clone + Step,impl<T> FusedIterator for std::result::IntoIter<T>
impl<'a, I, T> FusedIterator for Cloned<I> where
I: FusedIterator<Item = &'a T>,
T: 'a + Clone,impl<I> FusedIterator for Cycle<I> where
I: Clone + Iterator,impl<'a, P> FusedIterator for RMatchIndices<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl<A, B> FusedIterator for Chain<A, B> where
A: FusedIterator,
B: FusedIterator<Item = <A as Iterator>::Item>,impl<'a, T> FusedIterator for ChunksMut<'a, T>
impl<A> FusedIterator for Repeat<A> where
A: Clone,impl<A> FusedIterator for RangeFrom<A> where
A: Step,
&'a A: Add<&'a A>,
<&'a A as Add<&'a A>>::Output == A,impl<I> FusedIterator for DecodeUtf8<I> where
I: FusedIterator<Item = u8>,impl FusedIterator for std::char::EscapeDefault
impl<I> FusedIterator for Peekable<I> where
I: FusedIterator,impl<A> FusedIterator for std::option::IntoIter<A>
impl<'a, T, P> FusedIterator for RSplitNMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<I, F> FusedIterator for Inspect<I, F> where
F: FnMut(&<I as Iterator>::Item) -> (),
I: FusedIterator,impl<'a> FusedIterator for LinesAny<'a>
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, A> FusedIterator for std::option::IterMut<'a, A>
impl<'a, T, P> FusedIterator for std::slice::Split<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a> FusedIterator for CharIndices<'a>
impl<I> FusedIterator for Fuse<I> where
I: Iterator,impl<'a, T, P> FusedIterator for std::slice::RSplit<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a, I> FusedIterator for &'a mut I where
I: FusedIterator + ?Sized,impl<'a, T> FusedIterator for Chunks<'a, T>
impl<'a, T> FusedIterator for std::result::Iter<'a, T>
impl<I> FusedIterator for Enumerate<I> where
I: FusedIterator,impl<'a, P> FusedIterator for SplitTerminator<'a, P> where
P: Pattern<'a>,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<I> FusedIterator for Take<I> where
I: FusedIterator,impl<B, I, F> FusedIterator for Map<I, F> where
F: FnMut(<I as Iterator>::Item) -> B,
I: FusedIterator,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::SplitN<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a, T> FusedIterator for std::slice::IterMut<'a, T>
impl<'a, T> FusedIterator for Windows<'a, T>
impl<'a, T, P> FusedIterator for RSplitMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<T> FusedIterator for Empty<T>
impl<T> FusedIterator for Once<T>
impl<A> FusedIterator for RangeInclusive<A> where
A: Step,
&'a A: Add<&'a A>,
<&'a A as Add<&'a A>>::Output == A,impl<'a> FusedIterator for Bytes<'a>
impl<'a, P> FusedIterator for MatchIndices<'a, P> where
P: Pattern<'a>,impl FusedIterator for EscapeDebug
impl<'a, P> FusedIterator for Matches<'a, P> where
P: Pattern<'a>,impl<I> FusedIterator for Rev<I> where
I: FusedIterator + DoubleEndedIterator,impl<'a> FusedIterator for Chars<'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> FusedIterator for std::slice::Iter<'a, T>
impl<I, U, F> FusedIterator for FlatMap<I, U, F> where
F: FnMut(<I as Iterator>::Item) -> U,
I: FusedIterator,
U: IntoIterator,impl<'a, P> FusedIterator for std::str::Split<'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> FusedIterator for StepBy<A, RangeFrom<A>> where
A: Clone,
&'a A: Add<&'a A>,
<&'a A as Add<&'a A>>::Output == A,impl<A> FusedIterator for StepBy<A, Range<A>> where
A: Clone + Step,impl<'a, A> FusedIterator for std::option::Iter<'a, A>
impl<A> FusedIterator for std::ops::Range<A> where
A: Step,
&'a A: Add<&'a A>,
<&'a A as Add<&'a A>>::Output == A,impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<I, P> FusedIterator for SkipWhile<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<I> FusedIterator for Skip<I> where
I: FusedIterator,impl FusedIterator for std::ascii::EscapeDefault
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>