Struct IterCopiedRev

pub struct IterCopiedRev<'a, T> { /* private fields */ }

A const equivalent of iter::Rev<iter::Copied<slice::Iter<'a, T>>>

This const iterator can be created with

konst::slice::iter_copied(slice).rev()

Example

use konst::iter;
use konst::slice::{self, IterCopiedRev};

const fn rfind_even(slice: &[u32]) -> Option<u32> {
    let iter: IterCopiedRev<'_, u32> = slice::iter_copied(slice).rev();
    iter::eval!(iter,find(|&elem| elem % 2 == 0))
}

assert_eq!(rfind_even(&[]), None);
assert_eq!(rfind_even(&[1]), None);
assert_eq!(rfind_even(&[1, 2]), Some(2));
assert_eq!(rfind_even(&[1, 2, 3, 4, 5]), Some(4));

Implementations

impl<'a, T> IterCopiedRev<'a, T>

where T: Copy,

pub const fn copy(&self) -> IterCopiedRev<'a, T>

Creates a clone of this iterator

pub const fn rev(self) -> IterCopied<'a, T>

Reverses the iterator

pub const fn next(self) -> Option<(T, IterCopiedRev<'a, T>)>

Advances the iterator and returns the next value.

pub const fn next_back(self) -> Option<(T, IterCopiedRev<'a, T>)>

Removes and returns an element from the end of the iterator.

pub const fn as_slice(&self) -> &'a [T]

Accesses the remaining slice.

Trait Implementations

impl<'a, T> ConstIntoIter for IterCopiedRev<'a, T>

type Kind = IsIteratorKind

What kind of type this is:

type IntoIter = IterCopiedRev<'a, T>

The iterator that this can be converted into.

type Item = T

The item that Self::IntoIter yields on .next()