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 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]

Implementors

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