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