ring_pair

Tiny ring-buffer types specialized for exactly two elements.

Types

• RingPair<T>: inline storage with [T; 2]
• BoxedRingPair<T>: heap storage with Box<[T; 2]>

Both provide O(1) push, push_with, and accessors for older/newer entries.

Example

use ring_pair::{BoxedRingPair, RingPair};

let mut inline = RingPair::new(1);
inline.push(2);
assert_eq!(inline.as_pair(), (&1, &2));

let mut boxed = BoxedRingPair::new(String::from("a"));
boxed.push(String::from("b"));
assert_eq!(boxed.as_pair(), (&String::from("a"), &String::from("b")));

Development

cargo test