The Complete Rust Programming Reference Guide

Slices

Slices are views into sequences to provide a more unified interface for accessing, iterating, or otherwise interacting with these memory areas. Consequently, they are available through Vec<T>, especially since they implement the Deref trait to implicitly treat Vec<T> as a [T]—a slice of T.

The Vec<T> implementation also hints at that for the IntoIterator implementation for immutable and mutable references:

impl<'a, T> IntoIterator for &'a Vec<T> {    type Item = &'a T;    type IntoIter = slice::Iter<'a, T>;    fn into_iter(self) -> slice::Iter<'a, T> {        self.iter()    }}impl<'a, T> IntoIterator for &'a mut Vec<T> {    type Item = &'a mut T;    type IntoIter = slice::IterMut<'a, T>;    fn into_iter(self) -> slice::IterMut<'a, T> {        self.iter_mut()    }}

The ...