Notes (HPFP 26/31): Monad Transformers
26 Monad Transformers
26.3 EitherT
26.4 ReaderT
26.5 StateT
26.8 Lexically inner is structurally outer
26.14 Chapter Exercises
see exercise/src/ChapterExercises.hs
see exercise/src/HitCounter.hs
see exercise/src/Morra.hs