// #![feature(test)]

// #[cfg(test)]
// mod pure_caching {
//     extern crate test;
//     use self::test::Bencher;
//     use std::rc::Rc;

//     extern crate adapton;
//     use self::adapton::simple::{run_fact,run_fact_repeat};
//     use self::adapton::engine::Engine;
    
//     #[test]
//     fn it_works() {
//         assert_eq!(120 as u64, run_fact::<Engine>(5));
//     }
    
//     #[bench]
//     fn bench_fact_5(b: &mut Bencher) {
//         b.iter(|| run_fact::<Engine>(5));
//     }

//     #[bench]
//     fn bench_fact_5_repeat_100(b: &mut Bencher) {
//         b.iter(|| run_fact_repeat::<Engine>(5, 100));
//     }
// }