lru-cache-macros 0.3.1

A procedural macro for automatically caching the output of functions.
Documentation 
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use lru_cache_macros::lru_cache;

#[test]
fn multiple_caches() {
    use std::f64;
    #[lru_cache(20)]
    fn cached_sqrt(x: u64) -> f64 {
        f64::sqrt(x as f64)
    }
    #[lru_cache(20)]
    fn cached_log(x: u64) -> f64 {
        f64::ln(x as f64)
    }

    assert_eq!(cached_sqrt(9), f64::sqrt(9.0));
    assert_eq!(cached_log(9), f64::ln(9.0));
}