Freer doesn’t come for free

The question on how to best structure functional programming applications in either Haskell or Scala is still out with various ways to achieve modularity, encapsulation and testability. In the past I have been an advocate of the `Eff` monad, based on Oleg Kiselyov’s work on “Freer monads, more extensible effects”. However, after being involved with 2 large applications (both in Scala and Haskell)

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Freer Monadは止めた方がいいという話。途中までしか読んでないけど大体自分と同意見っぽい。これからはcapabilityもあるしなぁ。