Trait arrow2::trusted_len::TrustedLen

pub unsafe trait TrustedLen: Iterator { }

An iterator of known, fixed size. A trait denoting Rusts’ unstable TrustedLen. This is re-defined here and implemented for some iterators until std::iter::TrustedLen is stabilized.

Safety

This trait must only be implemented when the contract is upheld. Consumers of this trait must inspect Iterator::size_hint()’s upper bound.

Implementations on Foreign Types

impl<T> TrustedLen for Iter<'_, T>

impl<B, I: TrustedLen, T: FnMut(I::Item) -> B> TrustedLen for Map<I, T>

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

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

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

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

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

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

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

impl<T> TrustedLen for Once<T>

impl<T> TrustedLen for IntoIter<T>

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

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

impl<A: TrustedLen> TrustedLen for Take<A>

Implementors

impl TrustedLen for BitmapIter<'_>

impl<'a, A: IterableListArray> TrustedLen for ListValuesIter<'a, A>

impl<I: Index> TrustedLen for IndexRange<I>

Safety: a range is always of known length

impl<O: Offset> TrustedLen for BinaryValueIter<'_, O>

impl<O: Offset> TrustedLen for Utf8ValuesIter<'_, O>

impl<T, I: TrustedLen<Item = T>> TrustedLen for ZipValidity<'_, T, I>

impl<T: BitChunk> TrustedLen for BitChunks<'_, T>

impl<T: BitChunk> TrustedLen for BitChunksExact<'_, T>

impl<T: BitChunk> TrustedLen for BitChunkIter<T>

impl<T: BitChunk> TrustedLen for BitChunkOnes<T>