cache-macro 0.4.1

A procedural macro for automatically caching the output of functions.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

use cache_macro::cache;
use lru_cache::LruCache;

#[test]
fn multiple_args() {
    #[cache(LruCache : LruCache::new(20))]
    #[inline]
    fn ackermann(m: u64, n: u64) -> u64 {
        if m == 0 {
            n + 1
        } else if m > 0 && n == 0 {
            ackermann(m - 1, 1)
        } else {
            ackermann(m - 1, ackermann(m, n - 1))
        }
    }

    assert_eq!(ackermann(0, 0), 1);
    assert_eq!(ackermann(1, 0), 2);
    assert_eq!(ackermann(1, 1), 3);
    assert_eq!(ackermann(3, 2), 29);
}