Trait polars_arrow::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. *Implementation from Jorge Leitao on Arrow2

Safety

length of the iterator must be correct

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<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 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>

impl<I: TrustedLen + DoubleEndedIterator> TrustedLen for Rev<I>

impl<T> TrustedLen for Range<T> where
    Range<T>: Iterator, 

impl TrustedLen for Utf8ValuesIter<'_, i64>

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

impl TrustedLen for BitmapIter<'_>

impl<A: TrustedLen> TrustedLen for StepBy<A>

Implementors

impl<I: Iterator<Item = J>, J> TrustedLen for TrustMyLength<I, J>