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