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