log package:logging-facade

log :: (HasCallStack, Logging m) => LogLevel -> String -> m ()
logging-facade System.Logging.Facade
Produce a log message with specified log level.
package logging-facade
Uses
Simple logging abstraction that allows multiple back-ends Simple logging abstraction that allows multiple back-ends
logRecordLevel :: LogRecord -> LogLevel
logging-facade System.Logging.Facade.Types
logRecordLocation :: LogRecord -> Maybe Location
logging-facade System.Logging.Facade.Types
logRecordMessage :: LogRecord -> String
logging-facade System.Logging.Facade.Types
data LogLevel
logging-facade System.Logging.Facade System.Logging.Facade.Types
class Monad m => Logging m
logging-facade System.Logging.Facade System.Logging.Facade.Class
A type class for monads with logging support
type LogSink = LogRecord -> IO ()
logging-facade System.Logging.Facade.Sink
A consumer for log records
data LogRecord
logging-facade System.Logging.Facade.Types
LogRecord :: LogLevel -> Maybe Location -> String -> LogRecord
logging-facade System.Logging.Facade.Types
consumeLogRecord :: Logging m => LogRecord -> m ()
logging-facade System.Logging.Facade.Class
defaultLogSink :: IO LogSink
logging-facade System.Logging.Facade.Sink
A thread-safe log sink that writes log messages to stderr
getLogSink :: IO LogSink
logging-facade System.Logging.Facade.Sink
Return the global log sink.
setLogSink :: LogSink -> IO ()
logging-facade System.Logging.Facade.Sink
Set the global log sink.
swapLogSink :: LogSink -> IO LogSink
logging-facade System.Logging.Facade.Sink
Return the global log sink and set it to a new value in one atomic operation.
withLogSink :: LogSink -> IO () -> IO ()
logging-facade System.Logging.Facade.Sink
Set the global log sink to a specified value, run given action, and finally restore the global log sink to its previous value.