com.twitter.algebird
Group, Ring, and Field ARE NOT AUTOMATIC. You have to check that the laws hold for your Applicative. If your M[_] is a wrapper type (Option[_], Some[_], Try[_], Future[_], etc...) this generally works.
override this if there is a faster way to do this sum than reduceLeftOption on plus
Group, Ring, and Field ARE NOT AUTOMATIC. You have to check that the laws hold for your Applicative. If your M[_] is a wrapper type (Option[_], Some[_], Try[_], Future[_], etc...) this generally works.