Trait core::iter::FusedIterator

pub trait FusedIterator: Iterator { }

一个迭代器，用完后总是继续产生 None。

确保一次返回 None 的融合迭代器上的 next 调用保证再次返回 None。 该 trait 应该由以此方式运行的所有迭代器实现，因为它允许优化 Iterator::fuse()。

Note: 通常，如果需要融合的迭代器，则不应在泛型范围内使用 FusedIterator。 相反，您应该只在迭代器上调用 Iterator::fuse()。 如果迭代器已经融合，则额外的 Fuse 包装器将是无操作的，并且不会降低性能。

Implementors

impl FusedIterator for core::ascii::EscapeDefault

impl FusedIterator for core::char::EscapeDebug

impl FusedIterator for core::char::EscapeDefault

impl FusedIterator for core::char::EscapeUnicode

impl FusedIterator for ToLowercase

impl FusedIterator for ToUppercase

impl FusedIterator for Bytes<'_>

impl FusedIterator for CharIndices<'_>

impl FusedIterator for Chars<'_>

impl FusedIterator for EncodeUtf16<'_>

impl FusedIterator for Lines<'_>

impl FusedIterator for LinesAny<'_>

impl FusedIterator for SplitAsciiWhitespace<'_>

impl FusedIterator for SplitWhitespace<'_>

impl<'a> FusedIterator for EscapeAscii<'a>

impl<'a> FusedIterator for core::str::EscapeDebug<'a>

impl<'a> FusedIterator for core::str::EscapeDefault<'a>

impl<'a> FusedIterator for core::str::EscapeUnicode<'a>

impl<'a, I, T: 'a> FusedIterator for Cloned<I> where
    I: FusedIterator<Item = &'a T>,
    T: Clone, 

impl<'a, I, T: 'a> FusedIterator for Copied<I> where
    I: FusedIterator<Item = &'a T>,
    T: Copy, 

impl<'a, P> FusedIterator for RMatchIndices<'a, P> where
    P: Pattern<'a, Searcher: ReverseSearcher<'a>>, 

impl<'a, P> FusedIterator for RMatches<'a, P> where
    P: Pattern<'a, Searcher: ReverseSearcher<'a>>, 

impl<'a, P> FusedIterator for core::str::RSplit<'a, P> where
    P: Pattern<'a, Searcher: ReverseSearcher<'a>>, 

impl<'a, P> FusedIterator for core::str::RSplitN<'a, P> where
    P: Pattern<'a, Searcher: ReverseSearcher<'a>>, 

impl<'a, P> FusedIterator for RSplitTerminator<'a, P> where
    P: Pattern<'a, Searcher: ReverseSearcher<'a>>, 

impl<'a, P: Pattern<'a>> FusedIterator for MatchIndices<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for Matches<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for core::str::Split<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for core::str::SplitInclusive<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for core::str::SplitN<'a, P>

impl<'a, P: Pattern<'a>> FusedIterator for SplitTerminator<'a, P>

impl<'a, T, P> FusedIterator for core::slice::RSplitN<'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, T, P> FusedIterator for core::slice::SplitN<'a, T, P> where
    P: FnMut(&T) -> bool, 

impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where
    P: FnMut(&T) -> bool, 

impl<'a, T: 'a, P> FusedIterator for GroupBy<'a, T, P> where
    P: FnMut(&T, &T) -> bool, 

impl<'a, T: 'a, P> FusedIterator for GroupByMut<'a, T, P> where
    P: FnMut(&T, &T) -> bool, 

impl<A> FusedIterator for core::option::IntoIter<A>

impl<A> FusedIterator for core::option::Iter<'_, A>

impl<A> FusedIterator for core::option::IterMut<'_, A>

impl<A, B> FusedIterator for Chain<A, B> where
    A: FusedIterator,
    B: FusedIterator<Item = A::Item>, 

impl<A, B> FusedIterator for Zip<A, B> where
    A: FusedIterator,
    B: FusedIterator, 

impl<A, F: FnMut() -> A> FusedIterator for RepeatWith<F>

impl<A, F: FnOnce() -> A> FusedIterator for OnceWith<F>

impl<A: Clone> FusedIterator for Repeat<A>

impl<A: Step> FusedIterator for Range<A>

impl<A: Step> FusedIterator for RangeFrom<A>

impl<A: Step> FusedIterator for RangeInclusive<A>

impl<B, I: FusedIterator, F> FusedIterator for FilterMap<I, F> where
    F: FnMut(I::Item) -> Option<B>, 

impl<B, I: FusedIterator, F> FusedIterator for Map<I, F> where
    F: FnMut(I::Item) -> B, 

impl<I> FusedIterator for Cycle<I> where
    I: Clone + Iterator, 

impl<I> FusedIterator for Enumerate<I> where
    I: FusedIterator, 

impl<I> FusedIterator for Fuse<I> where
    I: Iterator, 

impl<I> FusedIterator for Rev<I> where
    I: FusedIterator + DoubleEndedIterator, 

impl<I> FusedIterator for Skip<I> where
    I: FusedIterator, 

impl<I> FusedIterator for Take<I> where
    I: FusedIterator, 

impl<I, P> FusedIterator for SkipWhile<I, P> where
    I: FusedIterator,
    P: FnMut(&I::Item) -> bool, 

impl<I, P> FusedIterator for TakeWhile<I, P> where
    I: FusedIterator,
    P: FnMut(&I::Item) -> bool, 

impl<I, U> FusedIterator for Flatten<I> where
    I: FusedIterator<Item: IntoIterator<IntoIter = U, Item = U::Item>>,
    U: Iterator, 

impl<I, U, F> FusedIterator for FlatMap<I, U, F> where
    I: FusedIterator,
    U: IntoIterator,
    F: FnMut(I::Item) -> U, 

impl<I: FusedIterator + ?Sized> FusedIterator for &mut I

impl<I: FusedIterator> FusedIterator for Peekable<I>

impl<I: FusedIterator, F> FusedIterator for Inspect<I, F> where
    F: FnMut(&I::Item), 

impl<I: FusedIterator, P> FusedIterator for Filter<I, P> where
    P: FnMut(&I::Item) -> bool, 

impl<T> FusedIterator for core::result::IntoIter<T>

impl<T> FusedIterator for core::result::Iter<'_, T>

impl<T> FusedIterator for core::result::IterMut<'_, T>

impl<T> FusedIterator for Chunks<'_, T>

impl<T> FusedIterator for ChunksExact<'_, T>

impl<T> FusedIterator for ChunksExactMut<'_, T>

impl<T> FusedIterator for ChunksMut<'_, T>

impl<T> FusedIterator for core::slice::Iter<'_, T>

impl<T> FusedIterator for core::slice::IterMut<'_, T>

impl<T> FusedIterator for RChunks<'_, T>

impl<T> FusedIterator for RChunksExact<'_, T>

impl<T> FusedIterator for RChunksExactMut<'_, T>

impl<T> FusedIterator for RChunksMut<'_, T>

impl<T> FusedIterator for Windows<'_, T>

impl<T> FusedIterator for Empty<T>

impl<T> FusedIterator for Once<T>

impl<T, F> FusedIterator for Successors<T, F> where
    F: FnMut(&T) -> Option<T>, 

impl<T, P> FusedIterator for core::slice::RSplit<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<T, P> FusedIterator for RSplitMut<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<T, P> FusedIterator for core::slice::Split<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<T, P> FusedIterator for core::slice::SplitInclusive<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<T, P> FusedIterator for SplitInclusiveMut<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<T, P> FusedIterator for SplitMut<'_, T, P> where
    P: FnMut(&T) -> bool, 

impl<T, const N: usize> FusedIterator for core::array::IntoIter<T, N>

impl<T, const N: usize> FusedIterator for ArrayChunks<'_, T, N>

impl<T, const N: usize> FusedIterator for ArrayChunksMut<'_, T, N>