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