Function itertools::rev

pub fn rev<I>(iterable: I) -> Rev<I::IntoIter> where
    I: IntoIterator,
    I::IntoIter: DoubleEndedIterator, 

Iterate iterable in reverse.

IntoIterator enabled version of .rev().

use itertools::rev;

for elt in rev(&[1, 2, 3]) {
    /* loop body */
}