Trait 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.

Trait Implementations

impl<T> TrustedLen for &mut dyn TrustedLen<Item = T>

impl<T> TrustedLen for Box<dyn TrustedLen<Item = T> + '_>

Implementations on Foreign Types

impl<'a, I, T> TrustedLen for Cloned<I>

where I: TrustedLen<Item = &'a T>, T: Clone + 'a,

impl<'a, I, T> TrustedLen for Copied<I>

where I: TrustedLen<Item = &'a T>, T: Copy + 'a,

impl<A, B> TrustedLen for Chain<A, B>

where A: TrustedLen, B: TrustedLen<Item = A::Item>,

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

where A: TrustedLen, B: TrustedLen,

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

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

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

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

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

impl<I> TrustedLen for Enumerate<I>

where I: TrustedLen,

impl<I, St, F, B> TrustedLen for Scan<I, St, F>

where F: FnMut(&mut St, I::Item) -> Option<B>, I: TrustedLen,

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

impl<K, V> TrustedLen for IntoIter<K, V>

impl<T> TrustedLen for Box<dyn TrustedLen<Item = T> + '_>

impl<T> TrustedLen for IntoIter<T>

impl<T> TrustedLen for Once<T>

impl<T> TrustedLen for Range<T>

where Range<T>: Iterator,

impl<T> TrustedLen for RangeInclusive<T>

where RangeInclusive<T>: Iterator,

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

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

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

Implementors

impl TrustedLen for FastU32BitmapIter<'_>

impl TrustedLen for FastU56BitmapIter<'_>

impl TrustedLen for FastU64BitmapIter<'_>

impl TrustedLen for polars_arrow::bitmap::iterator::IntoIter

impl TrustedLen for TrueIdxIter<'_>

impl TrustedLen for BitmapIter<'_>

impl<'a, A: ArrayAccessor<'a> + ?Sized> TrustedLen for NonNullValuesIter<'a, A>

impl<'a, A: ArrayAccessor<'a>> TrustedLen for ArrayValuesIter<'a, A>

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

Safety

A range is always of known length.

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

impl<T> TrustedLen for &mut dyn TrustedLen<Item = T>

impl<T, I, V> TrustedLen for ZipValidity<T, I, V>

where I: TrustedLen<Item = T>, V: TrustedLen<Item = bool>,

impl<T, I, V> TrustedLen for ZipValidityIter<T, I, V>

where I: TrustedLen<Item = T>, V: TrustedLen<Item = bool>,

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>