Trait std::iter::FusedIterator

1.26.0 · source ·

pub trait FusedIterator: Iterator { }

Expand description

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。

Trait std::iter::FusedIterator

Implementors§

impl FusedIterator for std::ascii::EscapeDefault

impl FusedIterator for std::char::EscapeDebug

impl FusedIterator for std::char::EscapeDefault

impl FusedIterator for std::char::EscapeUnicode

impl FusedIterator for ToLowercase

impl FusedIterator for ToUppercase

impl FusedIterator for Incoming<'_>

impl FusedIterator for IntoIncoming

impl FusedIterator for EncodeWide<'_>

impl FusedIterator for Ancestors<'_>

impl FusedIterator for Components<'_>

impl FusedIterator for std::path::Iter<'_>

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 FusedIterator for Utf8Chunks<'_>

impl FusedIterator for std::string::Drain<'_>

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<'a, T, P> FusedIterator for std::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 std::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> FusedIterator for std::ops::Range<A>where A: Step,

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

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

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

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

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

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

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

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

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

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

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

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

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

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 Peekable<I>where I: FusedIterator,

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, A> FusedIterator for Box<I, A>where I: FusedIterator + ?Sized, A: Allocator,

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

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

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

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

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

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

impl<I, const N: usize> FusedIterator for std::iter::ArrayChunks<I, N>where I: FusedIterator,

impl<K> FusedIterator for std::collections::hash_set::Drain<'_, K>

impl<K> FusedIterator for std::collections::hash_set::IntoIter<K>

impl<K> FusedIterator for std::collections::hash_set::Iter<'_, K>

impl<K, F> FusedIterator for std::collections::hash_set::DrainFilter<'_, K, F>where F: FnMut(&K) -> bool,