1.26.0[][src]Trait std::iter::FusedIterator

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 optimizing Iterator::fuse.

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