Trait std::iter::FusedIterator 1.26.0
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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.
Implementations on Foreign Types
impl<I> FusedIterator for Utf16Encoder<I> where
I: FusedIterator<Item = char>,
[src]
impl<I> FusedIterator for Utf16Encoder<I> where
I: FusedIterator<Item = char>,
Implementors
impl<I> FusedIterator for DecodeUtf8<I> where
I: FusedIterator<Item = u8>,impl<A> FusedIterator for RangeInclusive<A> where
A: Step,impl<T> FusedIterator for std::result::IntoIter<T>
impl<'a, T, P> FusedIterator for std::slice::Split<'a, T, P> where
P: FnMut(&T) -> bool,impl<I, F> FusedIterator for Inspect<I, F> where
F: FnMut(&<I as Iterator>::Item),
I: FusedIterator,impl<'a, T> FusedIterator for Chunks<'a, T>
impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where
P: FnMut(&T) -> bool,impl<I, P> FusedIterator for SkipWhile<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<A> FusedIterator for RangeFrom<A> where
A: Step,impl<T> FusedIterator for Empty<T>
impl<'a, T> FusedIterator for ChunksMut<'a, T>
impl<I, P> FusedIterator for Filter<I, P> where
I: FusedIterator,
P: FnMut(&<I as Iterator>::Item) -> bool,impl<I> FusedIterator for Peekable<I> where
I: FusedIterator,impl<'a, T> FusedIterator for std::slice::IterMut<'a, T>
impl<A, F> FusedIterator for RepeatWith<F> where
F: FnMut() -> A,impl<'a, T> FusedIterator for std::result::Iter<'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::Split<'a, P> where
P: Pattern<'a>,impl<'a, A> FusedIterator for std::option::IterMut<'a, A>
impl<'a, P> FusedIterator for std::str::SplitN<'a, P> where
P: Pattern<'a>,impl<'a> FusedIterator for Chars<'a>
impl<'a> FusedIterator for Lines<'a>
impl<'a, T, P> FusedIterator for SplitMut<'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, A> FusedIterator for std::option::Iter<'a, A>
impl<'a> FusedIterator for LinesAny<'a>
impl<'a, T> FusedIterator for ExactChunksMut<'a, T>
impl<'a, T, P> FusedIterator for std::slice::RSplitN<'a, T, P> where
P: FnMut(&T) -> bool,impl FusedIterator for EscapeUnicode
impl<'a, P> FusedIterator for MatchIndices<'a, P> where
P: Pattern<'a>,impl<'a, P> FusedIterator for RMatches<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl<'a, P> FusedIterator for RMatchIndices<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl<T> FusedIterator for Once<T>
impl<I> FusedIterator for Take<I> where
I: FusedIterator,impl<'a> FusedIterator for Bytes<'a>
impl<I> FusedIterator for Cycle<I> where
I: Clone + Iterator,impl<'a, I> FusedIterator for &'a mut I where
I: FusedIterator + ?Sized,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 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> FusedIterator for Repeat<A> where
A: Clone,impl<'a> FusedIterator for CharIndices<'a>
impl<'a, P> FusedIterator for std::str::RSplit<'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::RSplit<'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, P> FusedIterator for Matches<'a, P> where
P: Pattern<'a>,impl<I> FusedIterator for Skip<I> where
I: FusedIterator,impl<'a, T> FusedIterator for std::result::IterMut<'a, T>
impl<I> FusedIterator for Rev<I> where
I: FusedIterator + DoubleEndedIterator,impl<I, U, F> FusedIterator for FlatMap<I, U, F> where
F: FnMut(<I as Iterator>::Item) -> U,
I: FusedIterator,
U: IntoIterator,impl<I> FusedIterator for Fuse<I> where
I: Iterator,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 std::str::RSplitN<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,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 FusedIterator for EscapeDebug
impl<A> FusedIterator for std::ops::Range<A> where
A: Step,impl<'a, I, T> FusedIterator for Cloned<I> where
I: FusedIterator<Item = &'a T>,
T: 'a + Clone,impl<'a, P> FusedIterator for RSplitTerminator<'a, P> where
P: Pattern<'a>,
<P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,impl<'a, T> FusedIterator for Windows<'a, T>
impl<'a, T> FusedIterator for ExactChunks<'a, T>
impl<I> FusedIterator for Enumerate<I> where
I: FusedIterator,impl<B, I, F> FusedIterator for FilterMap<I, F> where
F: FnMut(<I as Iterator>::Item) -> Option<B>,
I: FusedIterator,impl FusedIterator for std::ascii::EscapeDefault
impl FusedIterator for std::char::EscapeDefault
impl<'a, T> FusedIterator for std::collections::vec_deque::Iter<'a, T>
impl<'a, T> FusedIterator for std::collections::binary_heap::Iter<'a, T>
impl<I> FusedIterator for Box<I> where
I: FusedIterator + ?Sized,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, K, V> FusedIterator for std::collections::btree_map::Values<'a, K, V>
impl<'a, K, V> FusedIterator for std::collections::btree_map::Iter<'a, K, V>
impl<T> FusedIterator for std::collections::btree_set::IntoIter<T>
impl<'a, K, V> FusedIterator for RangeMut<'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::Intersection<'a, T> where
T: Ord,impl<'a> FusedIterator for EncodeUtf16<'a>
impl<'a, T> FusedIterator for std::collections::vec_deque::IterMut<'a, T>
impl<'a, K, V> FusedIterator for std::collections::btree_map::IterMut<'a, K, V>
impl<'a, T> FusedIterator for std::collections::btree_set::Difference<'a, T> where
T: Ord,impl<T> FusedIterator for std::collections::linked_list::IntoIter<T>
impl<'a, T> FusedIterator for std::collections::linked_list::Iter<'a, T>
impl<T> FusedIterator for std::collections::vec_deque::IntoIter<T>
impl<'a, T> FusedIterator for std::collections::btree_set::Range<'a, T>
impl<K, V> FusedIterator for std::collections::btree_map::IntoIter<K, V>
impl<'a> FusedIterator for std::string::Drain<'a>
impl<'a, T> FusedIterator for std::collections::btree_set::Iter<'a, T>
impl<'a, K, V> FusedIterator for std::collections::btree_map::Keys<'a, K, V>
impl<T> FusedIterator for std::vec::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::ValuesMut<'a, K, V>
impl<'a, T> FusedIterator for std::collections::vec_deque::Drain<'a, T> where
T: 'a,impl<'a, T> FusedIterator for std::collections::btree_set::SymmetricDifference<'a, T> where
T: Ord,impl<'a, T> FusedIterator for std::collections::linked_list::IterMut<'a, T>
impl<T> FusedIterator for std::collections::binary_heap::IntoIter<T>
impl<'a> FusedIterator for SplitWhitespace<'a>
impl FusedIterator for ToUppercase
impl FusedIterator for ToLowercase
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>