RWS
scalaz
RWST
scalaz
Reader
scalaz
ReaderT
scalaz
ReaderWriterState
scalaz
ReaderWriterStateT
scalaz
Releasable
covariant
invariant
Resource
covariant
invariant
ResourceT
covariant
invariant
raii
thoughtworks
release
AsynchronousSemaphore
Resource
Resource
resource
Do
run
AsynchronousDoOps
CovariantResourceTOps
InvariantResourceTOps