How do I handle exceptions in Haskell?
In Haskell, you can handle exceptions using the Control.Exception
module. You can use try
to catch exceptions.
Can you show me a simple example of using try-catch?
Sure! Here's a basic example:
import Control.Exception
main :: IO ()
main = do
result <- try (evaluate (1 `div` 0)) :: IO (Either SomeException Int)
case result of
Left ex -> putStrLn $ "Caught exception: " ++ show ex
Right val -> print val
What types of exceptions can I catch?
You can catch various exceptions like ArithException
, IOException
, and custom exceptions defined in your code.
Is there a way to create my own exceptions?
Yes, you can create your own exceptions by defining a new data type and making it an instance of the Exception
class.
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