#[macro_use] extern crate cached;
// `cached!` macro requires the `lazy_static!` macro
#[macro_use] extern crate lazy_static;

use std::time::Duration;
use std::thread::sleep;

use cached::{Cached, SizedCache}; // trait must be in scope


cached!{ SLOW: SizedCache = SizedCache::with_capacity(50); >>
slow(n: u32) -> () = {
    if n == 0 { return; }
    sleep(Duration::new(1, 0));
    slow(n-1)
}}

pub fn main() {
    slow(10);
    slow(10);
    {
        let cache = SLOW.lock().unwrap();
        println!("hits: {:?}", cache.cache_hits());
        println!("misses: {:?}", cache.cache_misses());
        // make sure the cache-lock is dropped
    }
}