use cache_macro::cache; use lru_cache::LruCache; #[test] fn args_as_ref() { #[cache(LruCache : LruCache::new(20))] fn fib(x: &u32) -> u64 { println!("{:?}", x); if *x <= 1 { 1 } else { fib(&(x - 1)) + fib(&(x - 2)) } } assert_eq!(fib(&19), 6765); }