RWS
scalaz
RWST
scalaz
Reader
scalaz
ReaderT
scalaz
ReaderWriterState
scalaz
ReaderWriterStateT
scalaz
Releasable
covariant
invariant
ResourceT
covariant
invariant
raii
thoughtworks
release
Releasable
Releasable
resourceTParallelApplicative
ResourceT
ResourceT
run
Do
ResourceT
ResourceT