Trait competitive_hpp::prelude::__std_iter::TrustedLen

pub unsafe trait TrustedLen: Iterator { }

🔬 This is a nightly-only experimental API. (trusted_len)

An iterator that reports an accurate length using size_hint.

The iterator reports a size hint where it is either exact (lower bound is equal to upper bound), or the upper bound is None. The upper bound must only be None if the actual iterator length is larger than usize::MAX. In that case, the lower bound must be usize::MAX, resulting in a .size_hint of (usize::MAX, None).

The iterator must produce exactly the number of elements it reported or diverge before reaching the end.

Safety

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

Implementations on Foreign Types

impl<A> TrustedLen for IntoIter<A>

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

impl<const N: usize, T> TrustedLen for IntoIter<T, N> where
    [T; N]: LengthAtMost32, 

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

impl<A> TrustedLen for Range<A> where
    A: Step, 

impl<'_, A> TrustedLen for IterMut<'_, A>

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

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

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

impl<'_> TrustedLen for Bytes<'_>

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

impl<'_, A> TrustedLen for IterMut<'_, A>

impl<'_, A> TrustedLen for Iter<'_, A>

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

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

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

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

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

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

impl<'_, A> TrustedLen for Iter<'_, A>

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

impl<'_, I> TrustedLen for &'_ mut I where
    I: TrustedLen + ?Sized, 

impl<A> TrustedLen for IntoIter<A>

impl<T> TrustedLen for IntoIter<T>

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

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Implementors

impl<'_, T> TrustedLen for DrainSorted<'_, T> where
    T: Ord, 

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

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

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

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

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

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

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

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

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

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

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

impl<T> TrustedLen for Empty<T>

impl<T> TrustedLen for Once<T>

impl<T> TrustedLen for IntoIterSorted<T> where
    T: Ord, 

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