Trait std::iter::FusedIterator 1.26.0[−][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<'a, P> FusedIterator for Matches<'a, P> where
P: Pattern<'a>,impl<'a, T> FusedIterator for Windows<'a, T>
impl<'a, T> FusedIterator for ExactChunksMut<'a, T>
impl<A> FusedIterator for RangeInclusive<A> where
A: Step,impl<'a, T> FusedIterator for std::result::Iter<'a, T>
impl<'a, T, P> FusedIterator for std::slice::RSplitN<'a, T, P> where
P: FnMut(&T) -> bool,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::Split<'a, P> where
P: Pattern<'a>,impl<'a, T, P> FusedIterator for RSplitNMut<'a, T, P> where
P: FnMut(&T) -> bool,impl FusedIterator for std::ascii::EscapeDefault
impl<T> FusedIterator for std::result::IntoIter<T>
impl<'a, P> FusedIterator for RSplitTerminator<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl<A> FusedIterator for Repeat<A> where
A: Clone,impl<'a, T, P> FusedIterator for SplitMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a> FusedIterator for CharIndices<'a>
impl FusedIterator for std::char::EscapeDefault
impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a> FusedIterator for SplitWhitespace<'a>
impl<I, P> FusedIterator for SkipWhile<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<I> FusedIterator for Peekable<I> where
I: FusedIterator,impl<A> FusedIterator for RangeFrom<A> where
A: Step,impl<T> FusedIterator for Empty<T>
impl<T> FusedIterator for Once<T>
impl<'a, T> FusedIterator for ExactChunks<'a, T>
impl<I> FusedIterator for Fuse<I> where
I: Iterator,impl<'a> FusedIterator for Bytes<'a>
impl<'a, T> FusedIterator for std::slice::IterMut<'a, T>
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::RSplit<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl<'a, P> FusedIterator for SplitTerminator<'a, P> where
P: Pattern<'a>,impl<'a, I> FusedIterator for &'a mut I where
I: FusedIterator + ?Sized,impl<'a, P> FusedIterator for MatchIndices<'a, P> where
P: Pattern<'a>,impl<'a> FusedIterator for LinesAny<'a>
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> FusedIterator for Lines<'a>
impl<A, B> FusedIterator for Zip<A, B> where
A: FusedIterator,
B: FusedIterator,impl<I> FusedIterator for Cycle<I> where
I: Clone + Iterator,impl<I, P> FusedIterator for TakeWhile<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, F> FusedIterator for RepeatWith<F> where
F: FnMut() -> A,impl<'a, A> FusedIterator for std::option::IterMut<'a, A>
impl<A> FusedIterator for std::ops::Range<A> where
A: Step,impl<'a, T, P> FusedIterator for std::slice::Split<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a> FusedIterator for EncodeUtf16<'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 Chunks<'a, T>
impl<A> FusedIterator for std::option::IntoIter<A>
impl FusedIterator for EscapeUnicode
impl<I, P> FusedIterator for Filter<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<'a, T> FusedIterator for ChunksMut<'a, T>
impl<'a, T, P> FusedIterator for RSplitMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a, T> FusedIterator for std::slice::Iter<'a, T>
impl<I> FusedIterator for Skip<I> where
I: FusedIterator,impl<'a, P> FusedIterator for RMatches<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl FusedIterator for EscapeDebug
impl FusedIterator for ToUppercase
impl<'a, T> FusedIterator for std::result::IterMut<'a, T>
impl<B, I, F> FusedIterator for Map<I, F> where
F: FnMut(<I as Iterator>::Item) -> B,
I: FusedIterator,impl<I> FusedIterator for Rev<I> where
I: FusedIterator + DoubleEndedIterator,impl FusedIterator for ToLowercase
impl<'a> FusedIterator for Chars<'a>
impl<'a, A> FusedIterator for std::option::Iter<'a, A>
impl<B, I, F> FusedIterator for FilterMap<I, F> where
F: FnMut(<I as Iterator>::Item) -> Option<B>,
I: FusedIterator,impl<'a, T, P> FusedIterator for std::slice::SplitN<'a, T, P> where
P: FnMut(&T) -> bool,impl<'a, T, P> FusedIterator for std::slice::RSplit<'a, T, P> where
P: FnMut(&T) -> bool,impl<I> FusedIterator for Take<I> where
I: FusedIterator,impl<'a, I, T> FusedIterator for Cloned<I> where
I: FusedIterator<Item = &'a T>,
T: 'a + Clone,impl<I> FusedIterator for DecodeUtf8<I> where
I: FusedIterator<Item = u8>,impl<I, U> FusedIterator for Flatten<I> where
I: FusedIterator,
U: Iterator,
<I as Iterator>::Item: IntoIterator,
<<I as Iterator>::Item as IntoIterator>::IntoIter == U,
<<I as Iterator>::Item as IntoIterator>::Item == <U as Iterator>::Item,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::collections::binary_heap::Drain<'a, T> where
T: 'a,impl<'a, K, V> FusedIterator for std::collections::btree_map::Values<'a, K, V>
impl<'a, T> FusedIterator for std::collections::linked_list::IterMut<'a, T>
impl<'a, T> FusedIterator for std::collections::linked_list::Iter<'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<'a, K, V> FusedIterator for RangeMut<'a, K, V>
impl<T> FusedIterator for std::collections::btree_set::IntoIter<T>
impl<T> FusedIterator for std::collections::binary_heap::IntoIter<T>
impl<'a, T> FusedIterator for std::collections::binary_heap::Iter<'a, T>
impl<'a, T> FusedIterator for std::collections::btree_set::Union<'a, T> where
T: Ord,impl<I> FusedIterator for Box<I> where
I: FusedIterator + ?Sized,impl<'a, T> FusedIterator for std::collections::btree_set::Range<'a, T>
impl<'a, T> FusedIterator for std::collections::vec_deque::IterMut<'a, T>
impl<'a, T> FusedIterator for std::collections::vec_deque::Iter<'a, T>
impl<'a, K, V> FusedIterator for std::collections::btree_map::IterMut<'a, K, V>
impl<K, V> FusedIterator for std::collections::btree_map::IntoIter<K, V>
impl<'a, T> FusedIterator for std::vec::Drain<'a, T>
impl<'a, T> FusedIterator for std::collections::btree_set::Intersection<'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::btree_set::Difference<'a, T> where
T: Ord,impl<'a, K, V> FusedIterator for std::collections::btree_map::ValuesMut<'a, K, V>
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::btree_set::Iter<'a, T>
impl<'a> FusedIterator for std::string::Drain<'a>
impl<'a, T> FusedIterator for std::collections::btree_set::SymmetricDifference<'a, T> where
T: Ord,impl<'a, K, V> FusedIterator for std::collections::btree_map::Iter<'a, K, V>
impl<T> FusedIterator for std::collections::linked_list::IntoIter<T>
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>
impl<'a> FusedIterator for Ancestors<'a>