Time-sensitive cache; Howl code sample

Cache.howl

// (╯°□°)╯ ⌢ C#
⊐ System; ⊐̥ UnityEngine.Time;

⊓ Active.Howl{
‒ ○ Cache<T> ¿ T: ⊟{

    T? ω;  ⒡<T> evaluator;  ㅅ duration, end;

    ‒ Cache(⒡<T> φ, ㅅ expiry = 1f){
        evaluator = φ;  duration = expiry;
    }

    ‒̥ ⁱ ⨕ T(Cache<T> x) → time > x.end ∨ x.ω ☰ ∅ ? +x : x.ω.Value;

    ‒̥ T ⨕ +(Cache<T> x){
        x.end = time + x.duration;
        ⮐ (x.ω = x.evaluator()).Value;
    }

}}