peekaboo

docs - crates.io

Peekable iterator that allows to peek the next N elements without consuming them.

It's no_std compatible by default. It also doesn't perform any allocations.

Examples

Basic usage:

let xs = [1, 2, 3, 4, 5, 6, 7, 8, 9];
// create an iterator that allows us to peek at the next 4 element
let mut iter = xs.iter().peekable_n::<4>();

// peek() lets us see into the future
assert_eq!(iter.peek::<1>(), Some(&&1));
assert_eq!(iter.peek::<3>(), Some(&&3));

// the iterator will not advance until we call `next`
assert_eq!(iter.next(), Some(&1));
assert_eq!(iter.next(), Some(&2));

Use

Run cargo add peekaboo (if using a Rust version over 1.62), or manually add

peekaboo = "0.3.0"

to your Cargo.toml