How can I handle logging exceptions in Haskell?

How can I handle logging exceptions in Haskell?

In Haskell, you can use the Control.Exception module to handle exceptions. You can log exceptions using a logging library like monad-logger.

Can you show me a simple example of logging an exception?

Sure! Here's a basic example:

import Control.Exception
import Control.Monad.Logger

logException :: IO ()
logException = runStdoutLoggingT $ do
    result <- try (evaluate (error "This is an error")) :: LoggingT IO (Either SomeException ())
    case result of
        Left ex -> $(logError) (T.pack (show ex))
        Right _ -> $(logInfo) "No exception occurred"

What logging libraries do you recommend for Haskell?

I recommend monad-logger for structured logging and fast-logger for high-performance logging. Both are widely used.