Control.Monad.Logger

MonadLogger

class Monad m => MonadLogger m where

Methods

monadLoggerLog :: ToLogStr msg => Loc -> LogLevel -> msg -> m ()

Instances

MonadLogger IO

MonadLogger Identity

MonadLogger (ST s)

MonadLogger (ST s)

MonadLogger m => MonadLogger (ListT m)

MonadLogger m => MonadLogger (ResourceT m)

MonadLogger m => MonadLogger (MaybeT m)

MonadLogger m => MonadLogger (IdentityT m)

MonadLogger m => MonadLogger (ContT r m)

(MonadLogger m, Error e) => MonadLogger (ErrorT e m)

MonadLogger m => MonadLogger (ReaderT r m)

MonadLogger m => MonadLogger (StateT s m)

MonadLogger m => MonadLogger (StateT s m)

(MonadLogger m, Monoid w) => MonadLogger (WriterT w m)

(MonadLogger m, Monoid w) => MonadLogger (WriterT w m)

(MonadLogger m, Monoid w) => MonadLogger (RWST r w s m)

(MonadLogger m, Monoid w) => MonadLogger (RWST r w s m)

data LogLevel

Constructors

LevelDebug

LevelInfo

LevelWarn

LevelError

LevelOther Text

Instances

Eq LogLevel

Ord LogLevel

Read LogLevel

Show LogLevel

Lift LogLevel

TH logging

logDebug :: Q Exp

Generates a function that takes a Text and logs a LevelDebug message. Usage:

 $(logDebug) "This is a debug log message"

logInfo :: Q Exp

See logDebug

logWarn :: Q Exp

See logDebug

logError :: Q Exp

See logDebug

logOther :: Text -> Q Exp

Generates a function that takes a Text and logs a LevelOther message. Usage:

 $(logOther "My new level") "This is a log message"