RWS

scalaz

RWST

scalaz

Reader

scalaz

ReaderT

scalaz

ReaderWriterState

scalaz

ReaderWriterStateT

scalaz

raisedErrorsHandled

monadError

reflexive

equal

retention

lens

rightFM1Consistent

foldable1

rightFMConsistent

bifoldable foldable

rightIdentity

category divisible monad monoid

rightLeft

associative

rightPlusIdentity

plusEmpty

rightZero

monadPlus