Data.Fail
data Fail a
isFail
isOk
data FailT m a
runFailT
type FIO a
failEitherStr
failEitherShow
failEitherText
runExceptTFail
failInM
failInM'
failInM''
failToEither
failMaybe
failToMaybe
mapFail
failSwitch
fromFail
class MonadFailure m
failForIOException
catFails
eitherToError
errorToEither
liftError
errorToDefault
errorToMaybe
maybeToError
runError
runExceptTorFail
maybeToFail
eitherToFail
fromFailString
partitionFails
safeFromOk
class MonadFail m