Control.Monad.Trans.Crtn.Logger

describe logger

Documentation

class Monad m => MonadLog m where

Methods

scribe :: String -> m ()

Instances

MonadLog IO

(MonadTrans t, MonadLog m, Monad (t m)) => MonadLog (t m)

data LogOp i o where

Constructors

WriteLog :: LogOp String ()

type LogInput = Arg LogOp

type LogServer m r = SObjT LogOp m r

type LogClient m r = CObjT LogOp m r

writeLog :: Monad m => String -> LogClient m ()