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