Modulelogging-facade-0.3.1Haskell2010

System.Logging.Facade

This module is intended to be imported qualified:

import qualified System.Logging.Facade as Log

Producing log messages

6 declarations

valuelog :: (HasCallStack, Logging m) => LogLevel -> String -> m ()

Produce a log message with specified log level.

valuetrace :: (HasCallStack, Logging m) => String -> m ()

Produce a log message with log level TRACE.

valuedebug :: (HasCallStack, Logging m) => String -> m ()

Produce a log message with log level DEBUG.

valueinfo :: (HasCallStack, Logging m) => String -> m ()

Produce a log message with log level INFO.

valuewarn :: (HasCallStack, Logging m) => String -> m ()

Produce a log message with log level WARN.

valueerror :: (HasCallStack, Logging m) => String -> m ()

Produce a log message with log level ERROR.

2 declarations

classclass Monad m => Logging (m :: Type -> Type) where

A type class for monads with logging support

Instances12Logging, …

Logging IODefined in logging-facade-0.3.1 · System.Logging.Facade.Class
Log messages that are produced in the IO monad are consumed by the global LogSink.
Logging m => Logging (MaybeT m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
Logging m => Logging (ExceptT e m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
Logging m => Logging (IdentityT m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
Logging m => Logging (ReaderT r m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
Logging m => Logging (StateT s m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
Logging m => Logging (StateT s m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
(Monoid w, Logging m) => Logging (WriterT w m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
(Monoid w, Logging m) => Logging (WriterT w m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
Logging m => Logging (ContT r m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
(Monoid w, Logging m) => Logging (RWST r w s m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class
(Monoid w, Logging m) => Logging (RWST r w s m)Defined in logging-facade-0.3.1 · System.Logging.Facade.Class

datadata LogLevel

Instances6Bounded, Enum, Eq, Ord, Read, Show